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Luleå University of Technology
1.
Danielsson, Anton.
Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface.
Degree: 2015, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58890 
► This Master of Science thesis report describes the development process which aims to create a concept for a new off-road electric wheelchair for Permobil,…
(more)
▼ This Master of Science thesis report describes the development process which aims to create a concept for a new off-road electric wheelchair for Permobil, with a focus on the vehicle-to-ground interface. It was performed between January and July 2015 as part of the Master Degree program, Industrial Design Engineering at Luleå University of Technology.Everyone does not have the ability to walk or transport themselves by their own means at trails or rough terrain due to injuries or other kinds of disabilities. The project aims to investigate how a solution should be designed in order to suffice the needs of these kinds of users. In order to achieve the goals, a series of research questions was determined, one of which read: How does the vehicle-to-ground interface affect the traction of the vehicle and the comfort of the user?The theoretical framework presents research findings necessary to reach the aim of this project and focuses on topics such as modularity, terrain types, off-road capability, vehicle dynamics and comfort. The overall development process in this project used a method called Pulse Model. The first stage of the project was market research with a primary focus on Permobil’s X850 model, which was put through several tests. The main problems found were that its lack of lateral stability, low ground clearance, and overall harsh and bumpy ride comfort.The idea generation included both the use of LEGO® Technic bricks, the catalogue method and function prototypes, which resulted in a multitude of different suspension systems. A concept with front and rear trailing arms were chosen for further development and a full-scale prototype was fabricated and tested, which provided important feedback for the final concept.The prototype enabled a set of key aspects that should be considered when designing an off-road wheelchair. These were a ground clearance of at least 200 mm, four wheel drive, 50/50 weight distribution, 360 degree rear wheel steering, a front pivot bar suspension system and active lateral stability system in the rear which makes it able to maintain a level seat while traversing side slopes.In this project it was demonstrated that it is possible to design an off-road electric wheelchair which enables people with disabilities to move around more freely and independently in tough terrain. It is also possible achieve this on Permobil’s new modular chassis, which will reduce both manufacturing, stock and production costs for the products overall life cycle.
Validerat; 20150616 (global_studentproject_submitter)
Subjects/Keywords: Technology; off-road; electric wheelchair; Permobil; suspension; terrain; personal mobility; Teknik; off-road; electric wheelchair; Permobil; suspension; terrain; personal mobility
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APA (6th Edition):
Danielsson, A. (2015). Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58890
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Danielsson, Anton. “Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface.” 2015. Thesis, Luleå University of Technology. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58890.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Danielsson, Anton. “Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface.” 2015. Web. 05 Dec 2019.
Vancouver:
Danielsson A. Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface. [Internet] [Thesis]. Luleå University of Technology; 2015. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58890.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Danielsson A. Development of an Off-Road Electric Wheelchair : A Study of the Vehicle-to-Ground Interface. [Thesis]. Luleå University of Technology; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58890
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Olsson, Sofia.
Concept Study of Construction Ingress.
Degree: Machine Design, 2008, Linköping UniversityLinköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15647
► The purpose of this thesis is to, on Volvo Truck’s account, look at a new concept for the construction ingress used on construction vehicles…
(more)
▼ The purpose of this thesis is to, on Volvo Truck’s account, look at a new concept for the construction ingress used on construction vehicles which have a higher ground clearance than ordinary trucks. The high ground clearance makes it hard for the driver to reach the first instep and therefore a construction ingress is assembled below the stationary insteps. It is designed in a way that avoids damage if colliding with objects. The present construction ingress used is too expensive, too complex and a bit unsteady to climb on. There is also a new construction vehicle being developed and the old ingress might not fit the new truck. The concept generation is carried out using systematic concept development. There are many demands and requests for the ingress and these are summarized in a design criterion list. All wished-for properties can not be fulfilled for the simplest ingress designs since they conflict with each other, for example flexibility and stability. The concepts that are generated are evaluated and selected through different matrices until one concept is found to be the most promising. Different designs of this concept are discussed and one is chosen as the most suitable. The chosen concept design is already used by at least two competitors and that confirms its suitability. The detailed design presented is only a suggestion for a new construction ingress. Before manufacturing the design needs to be analysed more accurately and the strength, material and cost need to be optimized. The analyses made in the project only show that the design is realistic and that it is worth further work. The final design is promising since it is stable to use, consists of only a few simple parts and will be cheap to manufacture.
Subjects/Keywords: truck; construction vehicle; off-road; ingress; construction ingress; concept; design; Construction engineering; Konstruktionsteknik
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APA (6th Edition):
Olsson, S. (2008). Concept Study of Construction Ingress. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15647
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Olsson, Sofia. “Concept Study of Construction Ingress.” 2008. Thesis, Linköping UniversityLinköping University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15647.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Olsson, Sofia. “Concept Study of Construction Ingress.” 2008. Web. 05 Dec 2019.
Vancouver:
Olsson S. Concept Study of Construction Ingress. [Internet] [Thesis]. Linköping UniversityLinköping University; 2008. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15647.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Olsson S. Concept Study of Construction Ingress. [Thesis]. Linköping UniversityLinköping University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15647
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
3.
Giacosa, Matteo.
Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway.
Degree: Energy Systems Analysis, 2017, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226144
► Road transport is responsible for a significant share of the global GHG emissions. In order to address the increasing trend of road vehicle emissions,…
(more)
▼ Road transport is responsible for a significant share of the global GHG emissions. In order to address the increasing trend of road vehicle emissions, due to its heavy reliance on oil, Nordic countries have set ambitious goals and policies for the reduction of road transport GHG emissions. Despite the fact that the latest developments in the passenger car segment are leading towards the progressive electrification of the fleet, the decarbonization of heavy-duty vehicle segment presents significant challenges that are yet to be overcome. This study focuses, on the first part, on the regulatory framework of fuel economy standards of road vehicles, highlighting the absence of a European regulation on fuel efficiency for the heavy-duty sector. Energy efficiency technologies can be grouped mainly in vehicle technologies, driveline and powertrain technologies, and alternative fuels. The fuel efficiency of HDVs can be positively improved at different vehicle levels, but the technology benefit and its economic feasibility are heavily dependent on the vehicle type and the operational cycle considered. The electrification pathway has the potential of reducing the carbon emission to a great extent, but the current battery technologies have proven to be not cost efficient for the heavy vehicles, because of the high purchase price and the low range, related to the battery cost and inferior energy density compared to conventional liquid fuels. A scenario development model has been created in order to estimate and quantify the impact of future developments and emission reduction measures in Finland, Sweden and Norway for the timeframe 2016-2050, with a focus on 2030 results. Two scenarios concerning the powertrain developments of heavy-duty vehicles and buses have been created, a conservative scenario and electric scenario, as well as vehicle efficiency improvements and fuel consumption scenarios. Additional sets of parameters have been estimated as input for the model, such as national transport need and load assumptions. The results highlight the challenges of achieving the national GHG emission reduction targets with the current measures in all three countries. The slow fleet renewal rates and the high forecasted increase of transport need limit the benefits of alternative and more efficient powertrains introduced in the fleet by new vehicles. The heavy-duty transport is expected to maintain its heavy reliance on diesel fuel and hinder the improvements of the light-duty segments. A holistic approach is needed to reduce the GHG emissions from road transport, including more efficient powertrains, higher biofuel shares and progressive electrification.
Subjects/Keywords: road transport; GHG emissions; heavy-duty vehicles; buses; vehicle efficiency; scenario development; Energy Engineering; Energiteknik
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APA (6th Edition):
Giacosa, M. (2017). Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226144
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Giacosa, Matteo. “Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway.” 2017. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226144.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Giacosa, Matteo. “Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway.” 2017. Web. 05 Dec 2019.
Vancouver:
Giacosa M. Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway. [Internet] [Thesis]. KTH; 2017. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226144.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Giacosa M. Carbon dioxide abatement options for heavy-duty vehicles and future vehicle fleet scenarios for Finland, Sweden and Norway. [Thesis]. KTH; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226144
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
4.
Ekenstedt, Emelie.
Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
.
Degree: Chalmers tekniska högskola / Institutionen för data och informationsvetenskap, 2019, Chalmers University of Technology
URL: http://hdl.handle.net/20.500.12380/300410
► This thesis presents an extension to a communication protocol proposed by Casimiro and Schiller [1] for manoeuvre negotiation amongst autonomous vehicles. Local traffic rules establish…
(more)
▼ This thesis presents an extension to a communication protocol proposed by Casimiro
and Schiller [1] for manoeuvre negotiation amongst autonomous vehicles.
Local traffic rules establish a priority ordering amongst vehicles sharing a section
of road. The manoeuvre negotiation protocol establishes procedures for how lowpriority
vehicles can seek permission from high-priority vehicles to enter shared areas
of road, in order to avoid collisions even in the presence of some common network
failures. The extensions proposed in this thesis adapt the protocol to be used in
intersections and increase safety in traffic situations where vehicles do not maintain
an ideal speed. This protocol is run alongside a risk estimator that continuously
estimates the likelihood of a collision between vehicles. When a high risk situation is
detected, the risk estimator will trigger an emergency breaking event. The combined
system was tested in simulations where two vehicles approached an intersection
from opposite directions and the intended path of one vehicle turns left across the
intended path of the other vehicle. Variables to model communication loss, noisy
positional data and violations of traffic rules by one vehicle were incorporated into
the simulations in order to evaluate the rigidity of the system.
The combined system resulted in fewer collisions and near collisions than were observed
when running the same simulations using either the manoeuvre negotiation
protocol or risk estimator separately. Furthermore, the combined system was shown
to adhere to the established local traffic rules. The results indicate that a combined
risk estimator and manoeuvre negotiation protocol can create a more robust safety
system than one that relies solely on either component.
A correctness proof is also provided in this thesis to demonstrate analytically that
the protocol increases safety by both reducing the risk collision between vehicles and
preventing violations of the established local traffic rules.
Subjects/Keywords: Risk estimation;
Autonomous vehicles;
road safety;
communication protocol;
distributed system;
traffic priority;
intersection;
traffic simulation
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APA ·
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CSE |
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Manager
APA (6th Edition):
Ekenstedt, E. (2019). Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
. (Thesis). Chalmers University of Technology. Retrieved from http://hdl.handle.net/20.500.12380/300410
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ekenstedt, Emelie. “Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
.” 2019. Thesis, Chalmers University of Technology. Accessed December 05, 2019.
http://hdl.handle.net/20.500.12380/300410.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ekenstedt, Emelie. “Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
.” 2019. Web. 05 Dec 2019.
Vancouver:
Ekenstedt E. Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
. [Internet] [Thesis]. Chalmers University of Technology; 2019. [cited 2019 Dec 05].
Available from: http://hdl.handle.net/20.500.12380/300410.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ekenstedt E. Membership-based Manoeuvre Negotiation in Autonomous and Safety-critical Vehicular Systems
. [Thesis]. Chalmers University of Technology; 2019. Available from: http://hdl.handle.net/20.500.12380/300410
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Linköping University
5.
Attervall, Sebastian.
Styrning och nödbroms av ModuLith.
Degree: Management and Engineering, 2008, Linköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11987
► The purpose of this project is to get a fully functional, automatic steering system and a variable breaking system with an emergency breaking function…
(more)
▼ The purpose of this project is to get a fully functional, automatic steering system and a variable breaking system with an emergency breaking function to an off road vehicle. This off road vehicle is supposed to work as an aid in military situations. A team of two, Sebastian Attervall and Nichlas Gustafsson, got an order from Jonas Nyårds and the PreeRunners Project to construct a steering system that could manoeuvre an off road vehicle without any human involvement. To make this possible the vehicle would be guided by onboard sensors, cameras and computers. The team where also assigned to construct an automatic breaking system, there also no human would be involved. The breaking system should as well contain an emergency stop function to prevent any accidents. The team has solved the problems assigned by using theories by David G. Ullman. The system that was eventually chosen was a steering system containing a 48V, 250W DC motor. A planetary gear where chosen to increase the torque from the engine. To translate the torque from the planetary gear to the steering bar a chain with chainwheel where chosen, this because the chain and chainwheel could withstand the immense forces acting on the chain. Between the planetary gear and the chainwheel a skid clutch is placed to prevent destruction on the planetary gear due to overload. The whole steering system is monitored by two rotary encoders, one placed on the engine and one placed on the steering bar. The breaking system eventually chosen where a system build on the existing drum brakes, placed in the front. To make the system independent from any human interference a system containing a linear motor, an electromagnet and a spring where chosen. The system works by letting the spring act on the wire from the existing drum breaks. The spring is always compressed so a force will always act on the wire when the system is at rest. By compressing the spring further the force acting on the wire will decrease and by compressing it enough the breaks will be released. The force compressing the spring will come from the linear motor. And to make the system failsafe in case of an emergency an electromagnet will be placed between the linear motor and the spring. When the power is cut to the electromagnet the compressed spring will be released and the drum breaks will break. The breaking system as well will be supervised by encoders and in this case linear encoders.
Syftet med detta projekt är att få ett fungerande automatiskt styrsystem och en variabel broms med nödbromsfunktion till en fyrhjuling som ska bli ett hjälpmedel i militära situationer. En projektgrupp bestående av Sebastian Attervall och Nichlas Gustafsson fick i uppgift av beställare Jonas Nygårds att ta fram ett system som ska kunna manövrera en fyrhjuling utan att en människa är inblandad. På detta vis ska den fungera helt automatiskt med hjälp av sensorer, kameror och datorer. Projektgruppen fick även i uppgift att ta fram en broms som ska kunna fungera utan inblandning av en människa. Den ska även kunna…
Subjects/Keywords: Steering; Breaking; Automatic; Electric motor; ModuLith; Off road vehicle; ModuLith; Fyrhjuling; Styrning; Broms; Automatisk; Elmotor; Construction engineering; Konstruktionsteknik
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APA ·
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APA (6th Edition):
Attervall, S. (2008). Styrning och nödbroms av ModuLith. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Attervall, Sebastian. “Styrning och nödbroms av ModuLith.” 2008. Thesis, Linköping University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Attervall, Sebastian. “Styrning och nödbroms av ModuLith.” 2008. Web. 05 Dec 2019.
Vancouver:
Attervall S. Styrning och nödbroms av ModuLith. [Internet] [Thesis]. Linköping University; 2008. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Attervall S. Styrning och nödbroms av ModuLith. [Thesis]. Linköping University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Swedish University of Agricultural Sciences
6.
Hansson, Linnea.
Impacts of forestry operations on soil physical properties, water and temperature dynamics.
Degree: 2019, Swedish University of Agricultural Sciences
URL: https://pub.epsilon.slu.se/15912/
► Soil physical disturbances caused by forestry operations can be both intentional, e.g., soil scarification, and unintentional, e.g., soil compaction and rutting as a consequence of…
(more)
▼ Soil physical disturbances caused by forestry operations can be both intentional, e.g., soil scarification, and unintentional, e.g., soil compaction and rutting as a consequence of off-road traffic. All disturbances may alter the soil, and thus change its water and temperature dynamics, with consequences for both forest production and the surrounding ecosystems.
The overall aim of this thesis was to summarize how forestry operations – here: off-road traffic and soil scarification – affect the soil, its water content and tem-perature at clearcuts, as well as what implications this may have for, e.g., tree seed-ling establishment, field vegetation, and the surrounding ecosystems. The sum-mary is based on four studies, three on off-road traffic at two clearcuts in northern Sweden and one on soil scarification (disc trenching) at a clearcut in central Sweden. The methods used were soil sampling, X-ray tomography, image and soil physical analyses, in situ measurements of soil temperature and water content, vegetation survey, evaluation of abiotic growing conditions, and finally, hydrolog-ical modelling.
The most notable results were that even stony till soils in recharge areas were compacted by off-road traffic, which especially affected hydraulic conductivity, reducing it by 70%. Changes in soil physical properties caused by traffic may lead to longer periods of high water content, increased risk of surface runoff and insufficient root aeration. Five years after the operation, volumetric water content was higher in wheel tracks, and this was corroborated by the species composition of the vegetation. Simulations demonstrated how the changed soil hydrological properties influenced the water dynamics. Restricted aeration was more frequent in wheel tracks and could explain patches of bare soil in the lower parts of the slopes of the experimental plots. Logging mats and residues prevented creation of deep wheel tracks by off-road traffic, despite the additional passes necessary to apply (and remove) them. However, the logging residues were pressed into the soil, with potential soil compaction and element concentration beneath them as a result. To con-clude, care should be taken when planning off-road traffic, even on sandy till soils with high stone content.
After soil scarification, the soil temperature during growing season was higher in the furrows than in the area without disc trenching; the temperature effect lasted for at least six years, but decreased over time. No microsite was wet enough to hamper soil aeration after disc trenching. In conclusion, furrows offered a suitable microclimate for planting at the dry, boreal site.
Subjects/Keywords: off-road traffic; soil compaction; soil physical properties; soil temperature; aeration; moisture content; Ellenberg; Hydrus-1D; X-ray computed tomography
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hansson, L. (2019). Impacts of forestry operations on soil physical properties, water and temperature dynamics. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from https://pub.epsilon.slu.se/15912/
Chicago Manual of Style (16th Edition):
Hansson, Linnea. “Impacts of forestry operations on soil physical properties, water and temperature dynamics.” 2019. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed December 05, 2019.
https://pub.epsilon.slu.se/15912/.
MLA Handbook (7th Edition):
Hansson, Linnea. “Impacts of forestry operations on soil physical properties, water and temperature dynamics.” 2019. Web. 05 Dec 2019.
Vancouver:
Hansson L. Impacts of forestry operations on soil physical properties, water and temperature dynamics. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2019. [cited 2019 Dec 05].
Available from: https://pub.epsilon.slu.se/15912/.
Council of Science Editors:
Hansson L. Impacts of forestry operations on soil physical properties, water and temperature dynamics. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2019. Available from: https://pub.epsilon.slu.se/15912/
7.
Eriksson, Mikael.
An Alternative Variable Valve Timing System for Heavy Duty Vehicles.
Degree: Engineering Sciences and Mathematics, 2016, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153
► The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve…
(more)
▼ The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve timing technology enables the possibility to increase efficiency, lowering emissions, increase engine torque, etc. One of the simplest ways to obtain a variable valve timing is to use cam phasers. The dynamics of a hydraulic cam phaser has been studied, three concepts with the purpose to control such an element has been developed using simulation driven product development. Focus have been on robustness, simplicity and implementation. A final concept using on/off solenoids to control a torque driven cam phaser has been designed and simulated in GT-SUITE which validated its performance and functionality. A dynamic model was built in Simulink which simulated the behaviour of the cam phaser and provided tools for optimizing the rotor design. By combining the knowledge of mechanical- and control engineering at Scania, the development process of such machine elements was effective. The outcome of this thesis has given a new perspective in understanding these components and their potentials.
Subjects/Keywords: Variable; Valve Timing; VVT; Cam phaser; Heavy Duty; Scania; Commercial Vehicles; GT-SUITE; Dynamic; On/off valve; Product Development; Machine Element
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APA ·
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Manager
APA (6th Edition):
Eriksson, M. (2016). An Alternative Variable Valve Timing System for Heavy Duty Vehicles. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Eriksson, Mikael. “An Alternative Variable Valve Timing System for Heavy Duty Vehicles.” 2016. Thesis, Luleå University of Technology. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Eriksson, Mikael. “An Alternative Variable Valve Timing System for Heavy Duty Vehicles.” 2016. Web. 05 Dec 2019.
Vancouver:
Eriksson M. An Alternative Variable Valve Timing System for Heavy Duty Vehicles. [Internet] [Thesis]. Luleå University of Technology; 2016. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Eriksson M. An Alternative Variable Valve Timing System for Heavy Duty Vehicles. [Thesis]. Luleå University of Technology; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Forsman, Viking.
MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS.
Degree: Design and Engineering, 2019, Mälardalen University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44158
► Off-highway vehicle, such as excavators and forklifts, are heavy machines that are capable of causing harm to humans or damage property. Therefore, it is…
(more)
▼ Off-highway vehicle, such as excavators and forklifts, are heavy machines that are capable of causing harm to humans or damage property. Therefore, it is necessary to be able to develop interfaces for these kind of vehicles that can aid the operator to maintain a high level of situational awareness. How the interface affects the operators’ situational awareness is consequently an important metric to measure when evaluating the interface. Mixed reality simulators can be used to both develop and evaluate such interfaces in an immersive and safe environment. In this thesis we investigated how to measure situational awareness in a mixed-reality off-highway vehicle simulation scenario, without having to pause the scenario, by cross-referencing logs from the virtual environment and logs from the users' gaze position. Our method for investigating this research question was to perform a literature study and a user test. Each participant in the user test filled out a SART post-simulation questionnaire which we then compared with our measurement system.
Subjects/Keywords: situation awareness; SA; mixed reality; simulator; real-time; off-highway vehicles; eye tracking; Computer Sciences; Datavetenskap (datalogi)
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APA (6th Edition):
Forsman, V. (2019). MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS. (Thesis). Mälardalen University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44158
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Forsman, Viking. “MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS.” 2019. Thesis, Mälardalen University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44158.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Forsman, Viking. “MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS.” 2019. Web. 05 Dec 2019.
Vancouver:
Forsman V. MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS. [Internet] [Thesis]. Mälardalen University; 2019. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44158.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Forsman V. MEASURING SITUATION AWARENESS IN MIXED REALITY SIMULATIONS. [Thesis]. Mälardalen University; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44158
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
9.
Karlsson, Erika.
Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur.
Degree: Solid State Physics, 2018, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358290
► The conversion towards a more automated transport system causes new challenges for information sharing, responsibilities and infrastructure requirements. This study examines autonomous vehicles’ need…
(more)
▼ The conversion towards a more automated transport system causes new challenges for information sharing, responsibilities and infrastructure requirements. This study examines autonomous vehicles’ need of reliable information and infrastructure, and how it affects the future road transport system, with focus on road signs. The purpose of the study is to investigate how cooperation among different actors can meet the vehicles’ need of information, with the assumption of mixed traffic including vehicles of different automation levels. Interviews were conducted with representatives from the automotive industry, the transport administration, the transport agency and a transport research lab. The results indicate great complexity and diversity among the actors perspectives upon how the automated transport system will be designed in the future. It is clear that autonomous driving will be limited to geofenced areas and restricted under special conditions, at least in the near future. Redundant and secure information obtained e.g. from digital maps, cloud services and vehicle sensors will be important for the future automated vehicle to make accurate strategic-, tactical- and operational decisions. Further, it is important that actors collaborate and share this information with each other.
Subjects/Keywords: information technology; autonomous vehicles; infrastructure; road signs; informationsteknik; autonoma fordon; infrastruktur; vägmärken; Engineering and Technology; Teknik och teknologier
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APA (6th Edition):
Karlsson, E. (2018). Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Karlsson, Erika. “Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur.” 2018. Thesis, Uppsala University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Karlsson, Erika. “Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur.” 2018. Web. 05 Dec 2019.
Vancouver:
Karlsson E. Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur. [Internet] [Thesis]. Uppsala University; 2018. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Karlsson E. Autonoma fordons påverkan på infrastrukturen : En studie om förändrade behov av fysisk och digital infrastruktur. [Thesis]. Uppsala University; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Jönköping University
10.
Gudmundsson, Erik.
Road Transportation : Environmental sustainability vs. lead time and costs.
Degree: Jönköping International Business School, 2008, Jönköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1220
► The recession of the early 1990’s marked the starting point for a transformation of the Swedish transportation industry. Cost oriented production techniques by the…
(more)
▼ The recession of the early 1990’s marked the starting point for a transformation of the Swedish transportation industry. Cost oriented production techniques by the industry’s customer increased demand on swiftness, reliability and flexibility in transportation services. This development has continued ever since which in turn has continuously increased the rates of harmful discharges of emissions. The research is performed on the Swedish plastic industry and examines the relationship between environmental sustainability, lead time and cost when selecting road carrier for transportations. The main purpose is to examine to what extent environmental concerns are taken into account when deciding over distribution and furthermore, whether there exist potential and ambitions for improvements. Out of theories concerning transportation modal choice, four points of interest constitutes the basis for the empirical gathering; prioritization of selection determinants, environmental requirements in procurement of transportation services, use of rail freight and acceptable cost levels for implementing environmental sustainability. The study shows that the market of the Swedish plastic industry is driven by price competition and constant pressure from international trade. Naturally, cost is considered to be the foremost selection determinant in terms of transportation modal choice, followed by reliability and lead time. Furthermore, the study shows that environment is of low priority in respect to the other selection determinants. Although the current market condition diminishes the possibilities for changes, there exists a general ambition to become more environmental within the distribution activities. A majority of the respondent firms could potentially accept levels of increased transportation costs which balance with the costs of guaranteeing environmental sustainability in road transportations. In reference to increased environmental ambitions, three conclusions can be drawn. The relationship between environmental sustainability, lead time and cost allow for environmental improvements if lead time can be extended to the maximum conceivable limit of the market. Furthermore, the price competition of the market makes own initiatives impossible in terms of raising price for transportations; environmental sustainability in road transportation must therefore be preceded by demand for such. Finally, it can be concluded that environmental improvements cannot be achieved single handedly; costs must be evenly distributed among the suppliers, customers and haulers.
Subjects/Keywords: road transportation; environmental sustainability; Economics and Business; Ekonomi och näringsliv
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APA (6th Edition):
Gudmundsson, E. (2008). Road Transportation : Environmental sustainability vs. lead time and costs. (Thesis). Jönköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1220
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gudmundsson, Erik. “Road Transportation : Environmental sustainability vs. lead time and costs.” 2008. Thesis, Jönköping University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1220.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gudmundsson, Erik. “Road Transportation : Environmental sustainability vs. lead time and costs.” 2008. Web. 05 Dec 2019.
Vancouver:
Gudmundsson E. Road Transportation : Environmental sustainability vs. lead time and costs. [Internet] [Thesis]. Jönköping University; 2008. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1220.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gudmundsson E. Road Transportation : Environmental sustainability vs. lead time and costs. [Thesis]. Jönköping University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1220
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Pancorbo, Pablo Martinez.
Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues.
Degree: Energy and Environmental Engineering, 2018, University of Gävle
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27987
► Current private transportation remains very harmful for the environment, especially the non-electric vehicles. This report proposes five novel type of nanomaterials-based Li-ion batteries to…
(more)
▼ Current private transportation remains very harmful for the environment, especially the non-electric vehicles. This report proposes five novel type of nanomaterials-based Li-ion batteries to improve substantially the electric vehicle battery properties along with a substantial reduction of the environmental impact of its commercial counterparts. To address the problem, a cradle-to-gate life-cycle assessment has been performed in which the biggest emphasis has been focused on the energy and materials inputs and outputs during the raw materials extraction. We show how the analyzed Ni-doped graphene battery and Fe3O4-based Cu battery are the most environmentally friendly, stable, reliable and improved batteries among the five cases of study. These results can open new horizons for future advances in the implantation of an electromobility transportation.
I presented my work via Skype while sharing the screen.
Subjects/Keywords: electric vehicles; raw materials; environmental impact; carbon dioxide; Energy Systems; Energisystem
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APA ·
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CSE |
Export
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APA (6th Edition):
Pancorbo, P. M. (2018). Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pancorbo, Pablo Martinez. “Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues.” 2018. Thesis, University of Gävle. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pancorbo, Pablo Martinez. “Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues.” 2018. Web. 05 Dec 2019.
Vancouver:
Pancorbo PM. Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues. [Internet] [Thesis]. University of Gävle; 2018. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pancorbo PM. Cradle-to-gate life-cycle assessment of future materials for commercial lithium-ion batteries : Raw Materials issues. [Thesis]. University of Gävle; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
12.
Gonzales, Elkin.
Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar.
Degree: Building Technology and Design, 2016, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189558
► Näringslivet efterfrågar ett införande av 74 tons lastbilar på det statliga vägnätet. Det finns ett flertal fördelar med att höja maximala bruttovikten från nuvarande…
(more)
▼ Näringslivet efterfrågar ett införande av 74 tons lastbilar på det statliga vägnätet. Det finns ett flertal fördelar med att höja maximala bruttovikten från nuvarande 64 till 74 ton. Däremot är höga bruttovikter direkt kopplade till bärighetsrelaterade skador. Syftet med denna studie är att ligga till grund för vidare arbete av Trafikverket. Detta för att uppnå bättre kontroll på hela det statliga vägnätet och den tunga trafikens inverkan. Studien har utgått från observationer i PMSv3, ett webbaserat system med grafiska tvärprofiler baserade på vägytemätning samt information om det statliga belagda vägnätet. Observationerna innefattar mönsteridentifiering av återkommande tvärprofilstyper tillskrivna skador av den tunga trafiken. Resultatet av tvärprofilstyperna har sedan analyserats och beskrivits som representativa spårtyper för det statliga vägnätet. Slutsatsen är att det finns indikation på mönster av spårtyper. Utifrån observationerna i PMSv3 har spårtyperna formulerats som hypoteser för vidare forskning.
The wood industry asks for an imposition of 74-ton trucks on the national road system. There are several advantages of increasing the maximum gross weight from 64 to 74 tons. On the other hand, high gross weights are directly connected to structural road damage. The purpose of this study is to serve as foundation for further research by the Swedish transport administration. The ulterior goal is to reach better control on the national road system. The basis of the study is a web-based system - PMSv3, which contain road information and transverse road profiles. The observations in PMSv3 have led to rut-types ascribed due to heavy gross weights. The conclusion is that rut-patterns indications exist. Based on the observations in PMSv3, the rut-types have been formulated as hypothesis for further research.
Subjects/Keywords: heavy vehicles; road; road damage; PMSv3; road measurement; tunga fordon; väg; vägskador; PMSv3; vägytemätning
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APA ·
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CSE |
Export
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APA (6th Edition):
Gonzales, E. (2016). Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189558
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gonzales, Elkin. “Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar.” 2016. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189558.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gonzales, Elkin. “Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar.” 2016. Web. 05 Dec 2019.
Vancouver:
Gonzales E. Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar. [Internet] [Thesis]. KTH; 2016. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189558.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gonzales E. Vägskador av tung trafik : Upplåtande av vägnätet för 74-tons lastbilar. [Thesis]. KTH; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189558
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Jönköping University
13.
Hwang, Isabel.
An initial study on external warning signals for Quiet Road Transport Vehicles.
Degree: Product Development, 2016, Jönköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31111
► The increasing number of electric and hybrid vehicles in urban areas has shown to be beneficial in reducing both air and noise pollution. However,…
(more)
▼ The increasing number of electric and hybrid vehicles in urban areas has shown to be beneficial in reducing both air and noise pollution. However, the lack of sound when driving at low speed has negatively affected the pedestrian safety since many rely on the vehicle sound for orientation. Regulatory bodies have therefore introduced minimum sound requirements for all silent vehicles, which has resulted in a key challenge for car manufacturers to develop external warning signature sounds. The objective of this project has been to study how these signals should sound in order to fit the image of electric and hybrid vehicles and minimize noise and annoyance. To complete the study, five sound concepts with different characteristics and rhythms were developed using the concept generation process. In order to gain subjective impressions of the sounds, three measurement methods were utilized. The first listening test was performed to eliminate the possibility that the sound samples would be perceived variously loud in the upcoming tests. The second listening test was performed to gain information on how suitable the signals are for electric and hybrid vehicles, and the third listening test was conducted to obtain information on how much annoyance the signals contributed with. A reference signal representing an internal combustion engine was included in the tests as well. The results of the measurement methods showed that the sound samples with long tone sequences were more preferred than those with short tone sequences, and that the artificial approach was more popular than the sound of an internal combustion engine vehicle. It was also established that additional tests need to be performed in order to confirm that these results are valid. It was suggested that field tests should be conducted and that new sound concepts should be developed based on the results of these tests.
Subjects/Keywords: Quiet Road Transport Vehicles; Acoustic Vehicle Alerting System; External warning signals; Sound quality; Product sound design; Psychoacoustics; Engineering and Technology; Teknik och teknologier
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hwang, I. (2016). An initial study on external warning signals for Quiet Road Transport Vehicles. (Thesis). Jönköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31111
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hwang, Isabel. “An initial study on external warning signals for Quiet Road Transport Vehicles.” 2016. Thesis, Jönköping University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31111.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hwang, Isabel. “An initial study on external warning signals for Quiet Road Transport Vehicles.” 2016. Web. 05 Dec 2019.
Vancouver:
Hwang I. An initial study on external warning signals for Quiet Road Transport Vehicles. [Internet] [Thesis]. Jönköping University; 2016. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31111.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hwang I. An initial study on external warning signals for Quiet Road Transport Vehicles. [Thesis]. Jönköping University; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31111
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
14.
Nashed, Rose-Marie.
Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars.
Degree: Energy Technology, 2019, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250892
► Sweden is a geographically large and sparsely populated country, with a need for road transport for individuals as well as for logistics. Domestic road…
(more)
▼ Sweden is a geographically large and sparsely populated country, with a need for road transport for individuals as well as for logistics. Domestic road transport largely contributes to air pollutions, where passenger cars account for the largest share. Looking ahead, the present rate of reduction of emissions is not enough to reach the climate targets of a fossil free transport sector. Electric road system (ERS) has emerged to deal with drawbacks of electric vehicles. Several solutions are being evaluated at demonstration projects. Until now, ERS is mainly associated with heavy vehicles and the relation to passenger cars is not as clear, where this study explores the social advantages of ERS and passenger cars. A case study is conducted, where an ERS implementation between Helsingborg and Malmö as part of the European route E6 in Sweden is modelled. The NPV with an economic lifespan of 20 years and an interest rate of 3.5 percent amounts to 350 MSEK, considered as high profitable. The CO2 emissions of the studied system would be reduced by 102 000 tonnes CO2, corresponding to a decrease of about 60 percent. Looking at the studied system, heavy trucks are contributing to the most impact. Nevertheless, there is great potential for passenger cars utilising ERS to decrease their emissions and fuel costs. Several semi-structured interviews have been conducted to highlight the prevailing views of ERS and passenger cars and the impact of cost-benefit analysis (CBA) for decision-making of transport investments. Several diverse views of ERS and passenger cars exist. ERS is a large investment, where the main need is among heavy vehicles. However, the profitability would increase as the amount of vehicles utilising ERS increases. In a future road transport system, it is possible that several technologies such as ERS, fast chargers and autonomous vehicles could be utilised simultaneous, and complete each other rather than being substitutes. It is conceivable that ERS is planned out of the needs of heavy vehicles, where passenger cars might benefit of the system as well. More passenger cars would likely utilise ERS as it is implemented to a greater extent. Further, CBA could provide a perception of the investment. However, it does not ensure that the projects are performed or chosen out of highest NPV, since several aspects besides the profitability are considered. Available information of ERS for CBA is yet limited and more data, such as effect relations is needed to facilitate well-founded decisions. In the future, it is likely that CBA of transport investments would become more complex, where several technologies would be considered. The transport sector will most likely alter, and existing assessment methods will presumably be adjusted in line with this.
Sverige är ett geografiskt stort och glesbefolkat land med ett stort behov av vägtransporter för såväl privatpersoner som för logistik. Inrikes vägtransport bidrar i stor utsträckning till luftföroreningar, där…
Subjects/Keywords: Electric roads; ERS; road transport; conductive; charge; sustainability; infrastructure; passenger cars; social investment; CBA; electric vehicles; environment; automotive industry; implementation; decision-making; Engineering and Technology; Teknik och teknologier
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APA ·
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APA (6th Edition):
Nashed, R. (2019). Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250892
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nashed, Rose-Marie. “Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars.” 2019. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250892.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nashed, Rose-Marie. “Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars.” 2019. Web. 05 Dec 2019.
Vancouver:
Nashed R. Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars. [Internet] [Thesis]. KTH; 2019. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250892.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nashed R. Electric roads as future road transport : A study of Electric Road System (ERS) to facilitate sustainable road transport for passenger cars. [Thesis]. KTH; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250892
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
15.
Bakhiet, Omnia.
Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry.
Degree: Industrial Ecology, 2017, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210635
► Energy utilization in Sweden has been on a rise since the 1980’s and the industrial sector has been its highest consumer. The construction industry…
(more)
▼ Energy utilization in Sweden has been on a rise since the 1980’s and the industrial sector has been its highest consumer. The construction industry plays a central role in building and developing cities for a population which is increasing rapidly year by year. Environmental awareness has given incentives to reduce carbon dioxide emissions and to make operations more sustainable. The construction industry faces three main challenges in regards to sustainability which are, material usage, vehicle fleets, and machine parks. Vehicles and machines are integral parts within the construction industry, however, how to reduce their environmental impact is a relatively new research area with many challenges. The conclusion that carbon dioxide emissions must be reduced is one that has been reached by the construction industry in Sweden. One way to study this aspect is by collecting and managing data on their fuel consumption since the vehicles and machines operate almost exclusively on fossil fuels. Data collection on fuel consumption by vehicles and machinery will give insight to what factors increase or decrease it. Analyzing these factors will allow for reductions to be made in terms ofcarbon dioxide emissions and costs. The aim of this report is therefore to investigate the aspect of data collection and management on fuel consumption in vehicles and machinery. The report is the result of work conducted in cooperation with the Nordic construction and development company NCC. NCC has set a goal for reducing climate impacts from direct operations by 50% between the years 2015 and 2020. In order for this to be achieved, carbon dioxide emissions resulting from fuel consumption have to be accounted for. As this is a new research area, this report is to serve as a baseline for NCC to get an overview of what challenges and possibilities there are with efficient data collection and management on fuel consumption. The study is initiated by analyzing the three main aspects which are taken into consideration within this study. The first aspect is authoritative requirements which are demands from authorities such as municipalities or the Swedish Transport Administration. The second is the contractors such as NCC which have to meet these requirements. The final aspect is the suppliers who contractors hire for projects. Furthermore, interviews are carried out to gain insight on experiences of persons within the field and the challenges they have faced. A study on Norrtälje Harbor, an old industrial harbor turning into a new city district, is also conducted as there is available data from the vehicles and machines in this project. Finally, a gap-analysis is constructed in order to gain an overview of NCC’s present standings, future goals, andlimitations in terms of data collection and management from vehicles and machinery. The findings of this report conclude that a lack of standard is the biggest challenge which theindustry is facing. Authorities face challenges on how to set standards while the lack of…
Subjects/Keywords: Vehicles; machines; fuel consumption; data collection; Fordon; maskiner; bränsleförbrukning; datainsamling; Environmental Sciences; Miljövetenskap
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APA (6th Edition):
Bakhiet, O. (2017). Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210635
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bakhiet, Omnia. “Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry.” 2017. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210635.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bakhiet, Omnia. “Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry.” 2017. Web. 05 Dec 2019.
Vancouver:
Bakhiet O. Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry. [Internet] [Thesis]. KTH; 2017. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210635.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bakhiet O. Data collection for management of fuel consumption in vehicles and machinery : A study on the challenges and strategic possibilities in the construction industry. [Thesis]. KTH; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210635
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
16.
Singh, Archit.
Electric Road Systems : A feasibility study investigating a possible future of road transportation.
Degree: Energy Technology, 2016, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194242
► The transportation sector is a vital part of today’s society and accounts for 20 % of our global total energy consumption. It is also…
(more)
▼ The transportation sector is a vital part of today’s society and accounts for 20 % of our global total energy consumption. It is also one of the most greenhouse gas emission intensive sectors as almost 95 % of its energy originates from petroleum-based fuels. Due to the possible harmful nature of greenhouse gases, there is a need for a transition to more sustainable transportation alternatives. A possible alternative to the conventional petroleum-based road transportation is implementation of Electric Road Systems (ERS) in combination with electric vehicles (EVs). ERS are systems that enable dynamic power transfer to the EV's from the roads they are driving on. Consequently, by utilizing ERS in combination with EVs, both the cost and weight of the EV-batteries can be kept to a minimum and the requirement for stops for recharging can also be eliminated. This system further enables heavy vehicles to utilize battery solutions. There are currently in principal three proven ERS technologies, namely, conductive power transfer through overhead lines, conductive power transfer from rails in the road and inductive power transfer through the road. The aim of this report is to evaluate and compare the potential of a full-scale implementation of these ERS technologies on a global and local (Sweden) level from predominantly, an economic and environmental perspective. Furthermore, the thesis also aims to explore how an expansion of ERS might look like until the year 2050 in Sweden using different scenarios. To answer these questions two main models (global and Swedish perspective) with accompanying submodels were produced in Excel. The findings show that not all countries are viable for ERS from an economic standpoint, however, a large number of countries in the world do have good prospects for ERS implementation. Findings further indicated that small and/or developed countries are best suited for ERS implementation. From an economic and environmental perspective the conductive road was found to be the most attractive ERS technology followed by overhead conductive and inductive road ERS technologies. The expansion model developed demonstrates that a fast expansion and implementation of an ERS-based transportation sector is the best approach from an economical perspective where the conductive road technology results in largest cost savings until 2050.
Transportsektorn är en viktig del av dagens samhälle och står för 20% av den totala globala energiförbrukningen. Det är också en av de sektorer med mest växthusgasutsläpp, där nästan 95% av energin härstammar från petroleumbaserade bränslen. På grund av växthusgasers potentiellt skadliga karaktär finns det ett behov för en övergång till mer hållbara transportmedel. En möjlig alternativ till den konventionella petroleumbaserade vägtransporten är implementering av elektriska vägsystem (ERS) i kombination med elfordon. Elektriska vägsystem är system som möjliggör dynamisk kraftöverföring till fordon från vägarna de kör på. Sålunda kan man genom att använda ERS i…
Subjects/Keywords: Electric Roads Road Systems ERS Electric Vehicles Cars EVs Inductive Conductive Overhead Sustainability Optimal Electrification Full-scale Expansion Feasibility Techno-economic study Road Transportation; Elväg Elvägar Elvägssystem Elektriska Vägsystem Elfordon Elbilar Induktiv Konduktiv Hållbarhet Hållbar utveckling Optimal Elektrifiering Fullskalig Utbyggnad Genomförbarhetsstudie Tekno-ekonomisk studie Vägtransport
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APA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Singh, A. (2016). Electric Road Systems : A feasibility study investigating a possible future of road transportation. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194242
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Singh, Archit. “Electric Road Systems : A feasibility study investigating a possible future of road transportation.” 2016. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194242.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Singh, Archit. “Electric Road Systems : A feasibility study investigating a possible future of road transportation.” 2016. Web. 05 Dec 2019.
Vancouver:
Singh A. Electric Road Systems : A feasibility study investigating a possible future of road transportation. [Internet] [Thesis]. KTH; 2016. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194242.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Singh A. Electric Road Systems : A feasibility study investigating a possible future of road transportation. [Thesis]. KTH; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194242
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
17.
Unevik, Ingrid.
Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter.
Degree: Industrial Ecology, 2017, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213834
► De miljöproblem som har uppstått till följd av mänskliga aktiviteter uppmärksammas alltmer och itakt med detta ökar kraven på företag gällande transparens och hållbarhet.…
(more)
▼ De miljöproblem som har uppstått till följd av mänskliga aktiviteter uppmärksammas alltmer och itakt med detta ökar kraven på företag gällande transparens och hållbarhet. Många företag har därförvalt att börja arbeta systematiskt med miljöfrågor. Syftet med denna rapport är att bidra till ettförestående miljöarbete enligt ISO 14001 på ett medelstort företag inom tillverkningsindustrin,genom kartläggning och analys av dess miljöaspekter. Företaget i fråga hålls anonymt i denna rapport och de resultat som presenteras är sammanfattade och generaliserade. Ett antal avgränsningar behövde göras, där bland annat systemgränsen sattes till att enbart inkludera produktionen i en avföretagets anläggningar. Med grund i en litteraturstudie genomfördes kartläggningen av företagets miljöaspekter genom rundvandringar tillsammans med produktionspersonal. Miljöaspekterna identifierades inom fyra huvudprocesser inom produktionen: förbehandling, maskiner, kvalitetskontroll, och övrigbehandling. Analysen av miljöaspekterna delades upp i två delar. Den första delen innehöll en bedömning av de kartlagda miljöaspekternas betydelse med hjälp av fyra produktionsledare. Följande miljöaspekter bedömdes som de tre mest betydande för företaget: råmaterialanvändning (inom huvudprocessmaskiner), kemikalieanvändning (övrig behandling), och energi (maskiner). Endast råmaterialanvändningen bedömdes som hög miljörisk medan de andra två bedömdes som måttlig. Sett till hela bedömningen så bedömdes majoriteten av miljöaspekterna som måttlig, pågränsen till låg, miljörisk. Den andra delen av analysen bestod av en jämförelse med resultat från Sustainability Accounting Standards Board (SASB), Global Reporting Initiative (GRI), samt från en studie av industrier i Indien. SASB har identifierade miljöaspekter som är betydande för investerare inom olika industrikategorier. För den kategori som företaget i fråga går in under, överensstämmer resultaten av betydande miljöaspekter bra. Det samma gäller angående de av GRI identifierade miljöaspekterna somindustrier rapporterar mest om. Studien av industrier i Indien och de miljöaspekter som där bedömdes som mest betydande överensstämmer även de bra med produktionsledarnas ranking. Utöver dessa betydande miljöaspekter identifierades även en del andra områden som företaget börundersöka vidare, exempelvis: hantering av visst avfall, lokalisering av outsourcade tjänster, samttjänster som kan hjälpa till att säkerställa att lagar efterlevs. Det finns ett flertal aspekter som har påverkat resultaten i denna rapport, där de med störst inflytande är de avgränsningar som gjordes samt den subjektivitet som är förknippad med bedömningen. Subjektiviteten är svår att komma ifrån då bedömningen utförs av personer och deras egna åsikter, erfarenhet, och kunskap spelar in. Då resultaten överensstämde bra med övriga källor anses resultaten i denna rapport ändå vara tillräckligt pålitliga för att kunna användas som en grundav företaget vid ett eventuellt fortsatt miljöarbete. Det är dock viktigt att företaget i…
Subjects/Keywords: Environmental management system; ISO 14001; Environmental aspects; Significant environmental aspects; Miljöledningssystem; ISO 14001; Miljöaspekter; Betydande miljöaspekter; Environmental Management; Miljöledning
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APA ·
Chicago ·
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Export
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APA (6th Edition):
Unevik, I. (2017). Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213834
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Unevik, Ingrid. “Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter.” 2017. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Unevik, Ingrid. “Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter.” 2017. Web. 05 Dec 2019.
Vancouver:
Unevik I. Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter. [Internet] [Thesis]. KTH; 2017. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Unevik I. Förberedelse för miljöcertifiering på ett medelstort företag inom tillverkningsindustrin : Kartläggning och analys av miljöaspekter. [Thesis]. KTH; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213834
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Anavberokhai, Isah O.
Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria.
Degree: Technology and Built Environment, 2008, University of Gävle
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-716
► The forests are essential for healthy environment. Trees which are part of the forest help to stabilize the forest soil, improve soil fertility, reduce…
(more)
▼ The forests are essential for healthy environment. Trees which are part of the forest help to stabilize the forest soil, improve soil fertility, reduce the velocity of wind, protect watershed and reduce the amount of carbon released into the atmosphere. Many industries use trees as raw materials and in most cases impact the environment, but there are great differences in the impact they make. There is a need therefore to continually evaluate the operational activities of these industries to ensure that the environment is protected. The use of environmental management systems like ISO and EMAS standards has helped in the evaluation of organizations and industries. In this thesis, two sawmills Iretunde and Irepodun in Etsako-West local government area Edo state Nigeria were evaluated with the aim to determine their operational activities and how the environment is being affected by them. Subaims were to determine the most significant environmental aspects of the sawmill and their organizational structure. In actualizing the aim of this thesis, literature review, site investigation as well as oral interview of the staff and management of both sawmills were conducted. In the evaluation of the environmental aspects, the detailed method of environmental impact evaluation by Ammenberg (2004) was used were each environmental aspect that was weighted against nine identified criteria. The result obtained from the environmental aspect evaluation of both sawmills shows that the use of raw materials and emissions to air are the most significant environmental aspects. In conclusion, it was observed that the both sawmills are well structured and carry out their operational activities effectively. Neither of them has registered under any environmental management system but there is a need for them to do so in order to help check their operational activities in order to reduce their environmental impact.
Subjects/Keywords: Environmental review; environmental aspects ISO14001; sawmills; EMAS; Nigeria
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APA (6th Edition):
Anavberokhai, I. O. (2008). Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-716
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Anavberokhai, Isah O. “Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria.” 2008. Thesis, University of Gävle. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-716.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Anavberokhai, Isah O. “Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria.” 2008. Web. 05 Dec 2019.
Vancouver:
Anavberokhai IO. Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria. [Internet] [Thesis]. University of Gävle; 2008. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-716.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Anavberokhai IO. Environmental Aspects Review : A Case Study of Two Sawmills in Etsako-West, Edo State Nigeria. [Thesis]. University of Gävle; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-716
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Halmstad University
19.
Loney, Christian Kornhag.
Design av digitala hjälpmedel för att stödja elbilsanvändare.
Degree: Information Technology, 2017, Halmstad University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35767
► Idag ser vi en allt större ökning av eldrivna bilar. Fler länder och världsomfattande organisationer försöker framhäva elbilen för att accelerera dess adaption samt öka…
(more)
▼ Idag ser vi en allt större ökning av eldrivna bilar. Fler länder och världsomfattande organisationer försöker framhäva elbilen för att accelerera dess adaption samt öka dess användning. Denna ökning förhindras bland annat av skillnader i användning av el och tidigare drivmedel som gör det svårt för fossilbilsanvändare att byta till elbil. Problematiken grundar sig i att flera beteenden från användningen av fossildrivnabilar ej är applicerbara i den nya elbilskontexten. Det ökande intresset för elbilar ställer nu nya krav på de hjälpmedel som finns att tillgå i samband med elbilsanvändning. Med dagens utveckling blir allt fler hjälpmedel digitala, vilket ställer krav på dagens designers. Framtidens digitala hjälpmedel behöver tillgodose behov som inte existerat vid användningen av tidigare drivmedel. Vi har genom studien tagit fram designförslag med syfte att stödja elbilsanvändare med element från persuasive design, detta med hjälp av design patterns som format. En prototyp designad efter dessa designförslag har sedan utvärderats för att se hur digitala hjälpmedel kan stödja elbilsanvändare. Studien har skett genom en designstudie med ett kvalitativt tillvägagångssätt, där vi utifrån identifierade utmaningar har utvärderat den framtagna prototypen genom scenariodrivna funktionstester. Testerna utfördes av elbilsanvändare och fokuserade på deras upplevda stöd av prototypens funktioner. Studien har skapat förståelse om vad och varför elbilsanvändare upplever svårigheter vid användningen av elbilar och hur digitala hjälpmedel kan underlätta för elbilsanvändare att förändra beteende. Resultatet av denna studie har lett till skapandet av fem designförslag som utvärderats, reviderats och presenteras i slutet av uppsatsen.
Subjects/Keywords: Electric Vehicles; Human-Machine Interface; Persuasive Design; Persuasive Technology; Information Systems, Social aspects; Systemvetenskap, informationssystem och informatik med samhällsvetenskaplig inriktning
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APA ·
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APA (6th Edition):
Loney, C. K. (2017). Design av digitala hjälpmedel för att stödja elbilsanvändare. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Loney, Christian Kornhag. “Design av digitala hjälpmedel för att stödja elbilsanvändare.” 2017. Thesis, Halmstad University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Loney, Christian Kornhag. “Design av digitala hjälpmedel för att stödja elbilsanvändare.” 2017. Web. 05 Dec 2019.
Vancouver:
Loney CK. Design av digitala hjälpmedel för att stödja elbilsanvändare. [Internet] [Thesis]. Halmstad University; 2017. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Loney CK. Design av digitala hjälpmedel för att stödja elbilsanvändare. [Thesis]. Halmstad University; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Österlund, Ida.
Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?.
Degree: Life Sciences, 2010, Södertörn University College
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3749
► Denna uppsats handlar om hur den särskilda tillåtlighetsregeln i 11 kap. 6 § miljöbalken tillämpas vid tillståndsprövning av vattenverksamheter. Av paragrafen följer att en…
(more)
▼ Denna uppsats handlar om hur den särskilda tillåtlighetsregeln i 11 kap. 6 § miljöbalken tillämpas vid tillståndsprövning av vattenverksamheter. Av paragrafen följer att en vattenverksamhet endast får bedrivas om den samlade nyttan av verksamheten överväger de kostnader samt skador och olägenheter som verksamheten medför. Syftet med paragrafen är att hindra vattenverksamheter som inte är samhällsekonomiskt motiverade samt utgöra ett extra skydd för miljön utöver miljöbalkens generella miljökrav. Syftet med studien är undersöka hur denna paragraf tillämpas i praktiken – både i rättspraxis och i ansökningsförfarandet. Studien bygger i första hand på rättsvetenskaplig metod men ger även en mer allmän introduktion till samhällsekonomiska analysmetoder. Studien visar att det är mycket svårt att finna vägledning i praxis för hur en bedömning av samhällsnyttan bör gå till. Praxis visar dock att även faktorer som verksamhetens överensstämmelse med olika miljökvalitetsmål, art- och områdesskydd och estetiska värden kan få betydelse vid samhällsnyttobedömningen. Från sökandenas sida riktas generellt ett för stort fokus mot den privata eller företagsekonomiska nyttan av verksamheten. Sammantaget medför detta en risk för att miljövärden inte värderas på ett korrekt sätt när de vägs mot en mer konkret uttryckt monetär nytta. Ett bredare perspektiv på bedömningen bör därför antas. Vidare diskuteras även hur tillämpningen av bestämmelsen skulle kunna förbättras mot bakgrund av olika värderingsmetoder.
The subject matter of this Bachelor’s thesis is the special permit condition applying to water operations in accordance with chapter 11 section 6 of the Swedish Environmental Code. The article states that water operations may only be undertaken if the benefits, from the point of view of public and private interests, are greater than the costs and damages associated with them. The purpose of the regulation is to prevent water operations that are not socially efficient and to provide an additional protection for the environment, in excess of the general rules of consideration in the Code. The purpose of this study is to look into how this particular article is applied in practice. This is done by analysing the legal usage as practiced by the court as well as by the applicants. The general rule is that the applicant has to show that the operation, for which the permit is being sought, is in compliance with the obligations associated with the activity. The study shows that it is very difficult to find guidance from case law on how an assessment of the social efficiency is to be carried out. Court practice indicates that circumstances such as whether the operation is in compliance with certain environmental objectives can be used to weight different aspects in the social efficiency assessment. However, the assessments carried out by the applicants are in general focused on the economic benefits for the applicant. This practice might entail a risk for environmental values not being…
Subjects/Keywords: environmental law; environmental economics; trade-off; cost-benefit analysis; valutation of ecosystem services; miljörätt; miljöekonomi; avvägningar; kostnadsnyttoanalys; värdering av ekosystemtjänster; NATURAL SCIENCES; NATURVETENSKAP
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APA (6th Edition):
Österlund, I. (2010). Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?. (Thesis). Södertörn University College. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3749
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Österlund, Ida. “Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?.” 2010. Thesis, Södertörn University College. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3749.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Österlund, Ida. “Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?.” 2010. Web. 05 Dec 2019.
Vancouver:
Österlund I. Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?. [Internet] [Thesis]. Södertörn University College; 2010. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3749.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Österlund I. Samhällsnyttan av vattenverksamheter : Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?. [Thesis]. Södertörn University College; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3749
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Klåvus, Malin.
The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia.
Degree: Humanities and Planning, 2009, School of Technoculture
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4567
► This diploma work is carried through in Australia on a site in North Strathfield in the Sydney region. The whole work is built up…
(more)
▼ This diploma work is carried through in Australia on a site in North Strathfield in the Sydney region. The whole work is built up around the idea to do four plan proposals that are optimized from different aspects. These aspects are chosen because we believe they are the most important issues in planning. Our four approaches are transportation, commercial, environmental and social aspects which will be joined into one final plan proposal. For each approach we have chosen what to focus on to delimitate the work. Our site in North Strathfield is triangularly shaped and surrounded by infrastructure; a railway and two motorways. Within our site there are two train stations which take you to Sydney CBD in 20 minutes. North Strathfield’s residential stock consists today of mostly low density housing from the beginning of the 1900s. At some places on the site, especially along the railway, new high density developments have been built. Centrally in the site there are big green areas for recreation and sports. The three biggest plots belong to Energy Australia, Mason Park Electrical Substation and an outlet shopping centre. The theoretical framework chapter concludes the literature we have read which form what our focus will be through the following chapters: • The transportation aspect focuses on street structure and promoting walking, cycling and public transportation. • The commercial aspect focuses on mixed use, location and scale. • The environmental aspect focuses on the suburb morphology, the street structure and spaciousness. • The social aspect focuses on life by activities, street as a place and on the physical structure. Two subjects we found ourselves talking about in each approach were street structure and density. Each analysis result in challenges which are given conceptual answers in the concept chapter, the challenges and the concepts are: • For the transportation aspect: o Enable people to take the shortest route to their destinations outside the site by improving the connections to its surroundings. o Improve the possibilities to take alternative routes within the area by supplying better connections within the site. o Increase the orientation ability within the area by strengthens different characters of the streets. o Increase the number of people travelling with public transportation by providing park and ride facilities, by increasing the density of buildings and people and by making the stations, and the way to them, more visible. o Make more people walk and cycle when doing short trips by prioritize the pedestrians and cyclists in the street environment. • For the commercial aspect: o Have more people on a smaller area by raising the density of housing and people. o Get a lively and long-lived commercial area by using the location of nearby major roads, by establishing centre in the most connected place and by dividing blocks into smaller sizes. • For the environmental aspect: o Get a more walkable suburb by dividing blocks into smaller sizes and by improving the permeability within the…
Subjects/Keywords: Spatial Planning; Developing a Plan Proposal; New Method; Transportation aspects; Commercial aspects; Environmental aspects; Social aspects; Australia; Sydney region
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APA (6th Edition):
Klåvus, M. (2009). The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia. (Thesis). School of Technoculture. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4567
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Klåvus, Malin. “The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia.” 2009. Thesis, School of Technoculture. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4567.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Klåvus, Malin. “The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia.” 2009. Web. 05 Dec 2019.
Vancouver:
Klåvus M. The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia. [Internet] [Thesis]. School of Technoculture; 2009. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4567.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Klåvus M. The New Approach : A New Model to Develop a Plan Proposal. North Strathfield, Australia. [Thesis]. School of Technoculture; 2009. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4567
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Nordin, Lina.
Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective.
Degree: 2015, University of Gothenburg / Göteborgs Universitet
URL: http://hdl.handle.net/2077/38654
► Practices in winter road maintenance are dependent on the climate and weather impacting roads and the road users’ requirements. As in many other fields of…
(more)
▼ Practices in winter road maintenance are dependent on the climate and weather impacting roads and the road users’ requirements. As in many other fields of transportation, it is of interest to investigate fuel efficiency potentials in the different aspects of the road maintenance area. The main focus of this thesis was on investigating energy use in winter road maintenance activities in southern Sweden. It is crucial to understand which parameters are of the largest significance in slipperiness, as well as to investigate the weather information that the operations are based on, since the climate is the reason for requiring winter road maintenance in the first place. The original energy use needs to be set, to be able to know whether efficiencies are made. In this thesis, two approaches were taken to understand if existing fuel consumption models for heavy-duty vehicles could be applied within winter road maintenance or whether in-vehicle fuel data such as data from vehicle manufacturers should be used instead. Finally efficiency potentials were explored with the use of a route optimisation programme for winter road maintenance practices.
The climate data analyses showed that frost warnings are the most common type of slipperiness in the southern parts of Sweden. If such warnings were to be under- or overestimated, it could have a large impact on the energy used, since unnecessary slipperiness treatments could be performed. Furthermore, the mobile water depth measurements indicated that it is possible to detect differences in water depth along roads and that exit ramps could be interesting in terms of changed treatments, since the water depths were quite large on those ramps. From the use of the fuel consumption model included in the Swedish National Road and Transport Research Institute, or VTI, winter model, it was concluded that anti-icing would not be energy efficient in terms of traffic energy use, since drivers tend to drive at higher speeds on salted roads. Snow density and amount would however, impact fuel consumption, which is why the removal of snow could save traffic energy use.
The best method to evaluate energy use during winter road maintenance was the use of in-vehicle data. The existing fuel consumption model used in this thesis, underestimated the fuel use, which implied that the energy use in winter road maintenance practices depends on other aspects than what was stated in the model calculations. Such other aspects seemed to be the weather and way of work that in turn demand significant changes in speed. Changes in speed was also regarded as a potential efficiency measure, as the velocities of the heavy-duty vehicles seemed on average to be below what was estimated as the most fuel-efficient speed for this type of vehicle. Using the route optimisation programme further put a way for evaluating efficiency potentials. It was shown that installing underground heating systems or road surface–installed salt spreaders at strategic locations could save fuel use, as would changing operations from sanding to…
Subjects/Keywords: Road climate; RWIS; frost; snow; fuel consumption; heavy-duty vehicles; route optimisation programme; energy efficiency; winter road maintenance
…road maintenance (WRM) aspects. So the new guiding question and hence the
title of… …environmental policy that is aimed at reducing the impacts of the road transportation system on the
7… …environmental aspects as restrictions in the use of different chemicals, oils and other
fuels, and the… …iced. Sanding a road
surface at temperatures close to zero normally yields a sand spray-off… …24
Efficiencies regarding the Road Weather Information System (Paper I)…
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APA ·
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APA (6th Edition):
Nordin, L. (2015). Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/38654
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nordin, Lina. “Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective.” 2015. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed December 05, 2019.
http://hdl.handle.net/2077/38654.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nordin, Lina. “Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective.” 2015. Web. 05 Dec 2019.
Vancouver:
Nordin L. Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2015. [cited 2019 Dec 05].
Available from: http://hdl.handle.net/2077/38654.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nordin L. Energy Efficiency in Winter Road Maintenance - A Road Climatological Perspective. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2015. Available from: http://hdl.handle.net/2077/38654
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Wahlberg, Linnea.
Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator.
Degree: Faculty of Arts and Sciences, 2013, Linköping UniversityLinköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94622
► The 85th percentile off-road glances while performing three tasks on an in-vehicle system while driving in a simulator was investigated. The tasks were a…
(more)
▼ The 85th percentile off-road glances while performing three tasks on an in-vehicle system while driving in a simulator was investigated. The tasks were a radio task, a telephone task and a sound settings task which were performed at three occasions each. The distribution of 85th percentile off-road glance durations for each subject and task showed that durations differed between individuals rather than between tasks. It also turned out that durations longer than 2.00 seconds were not rare and 2 of 16 subjects had durations longer than 2.00 seconds in the radio task. Even though the distribution showed small differences between tasks on an individual level, differences on a group level were found between the tasks. A tendency of a learning effect was found, which implied a decrease in 85th percentile off-road glance durations as the tasks were performed at several occasions. A tendency of a floor effect in 85th percentile off-road glance durations, when the subjects are familiarized with tasks, was also found. Performance on a computerized trail-making test, measuring ability of visual search, motor speed and mental flexibility, was found not to be related with 85th percentile off-road glance durations.
Subjects/Keywords: off-road glances; off-road glance durations; in-vehicle system; infotainment system; learning effect; NHTSA; NHTSA guidelines; car simulator; trail-making test; driving; road safety; Human Computer Interaction; Människa-datorinteraktion (interaktionsdesign)
…which include
elements such as the road and other vehicles. The driver updates his/her current… …off-road glance durations, i.e. lengths
of off-road glances during the precipitating event… …In particular, interactions that
require off-road glances longer than 2.00 seconds are… …than 15
percent of the off-road eye glances are allowed to be longer than 2.00 seconds, and… …of the
distribution of off-road glance durations is in accordance with Horrey and Wickens…
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APA ·
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APA (6th Edition):
Wahlberg, L. (2013). Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wahlberg, Linnea. “Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator.” 2013. Thesis, Linköping UniversityLinköping University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wahlberg, Linnea. “Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator.” 2013. Web. 05 Dec 2019.
Vancouver:
Wahlberg L. Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator. [Internet] [Thesis]. Linköping UniversityLinköping University; 2013. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wahlberg L. Eyes on the Road! : Off-Road Glance Durations when Performing Tasks on In-Vehicle Systems while Driving in a Simulator. [Thesis]. Linköping UniversityLinköping University; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
24.
Ringström, Anna.
Life Cycle Assessment of a Road Ferry.
Degree: Environmental science and Engineering, 2019, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253831
► On a national level, the Swedish Transport Administration (STA) constitute the responsibleauthority for national long-term infrastructure planning in Sweden and therefore has animportant role…
(more)
▼ On a national level, the Swedish Transport Administration (STA) constitute the responsibleauthority for national long-term infrastructure planning in Sweden and therefore has animportant role for limit the environmental load from domestic transport. STA Road Ferries isresponsible actor within STA, for national infrastructure planning connected to public marinetransport and has formulated the goal of net zero GHG emissions by year 2045 for the ferryfleet. Today, yearly operation causes around 38,400 tons CO2-equivalents. Emissions fromconstruction, maintenance and deconstruction of road ferries are yet unknown. In order to reachclimate neutrality, identification of emissions from a life cycle perspective is needed. This study analyses environmental performance of a standard road ferry from an LCAperspective to be used as a baseline in future work towards climate neutrality. The LCA wasconducted in SimaPro 8.4.0 and evaluated thorough EPD (2013) methodology according to theEN 15804 standardisation. The report gives initial baseline values for the road ferry Neptunus and identifies daily operationas major hotspot in terms of total environmental impact from analysed impact categories, butalso construction phase is of importance to consider. The study further concludes that based onlong term goal and vision as STA Road Ferries has formulated them to today, a combination ofchange in construction in terms of material choices and design, together with changed fuelalternative is considered necessary in order to reach Vision 45. Future studies are recommended on this subject to reach the long term goal and vision. Forexample, studies that complement the developed model with more project specific process dataand include more components, and comparative LCA’s between different fuel alternatives.
Trafikverket är den aktör och myndighet som ansvarar för den långsiktiga, nationellainfrastrukturplaneringen i Sverige och som därför har en viktig roll i begränsandet avmiljöpåverkan från landets transportsektor. Färjerederiet är ansvarig aktör inom Trafikverketför nationell infrastrukturplanering och drift kopplat till den statliga inrikessjöfarten i form avfärjedrift. Färjerederiet har idag formulerat det långsiktiga målet att nå nollnetto utsläpp förfärjeflottan till år 2045. Idag orsakar färjedriften 38,400 ton CO2 ekvivalenter årligen vilket dåenbart är utsläpp kopplat till driften. Emissioner från konstruktion, underhåll ochdekonstruktion är dock fortfarande okänt. För att nå total klimatneutralitet behövs såledesidentifiering av emissioner ur ett livscykelperspektiv. Den här studien analyserar miljöprestandan av en standardfärja från Färjerederiets färjeflotta urett livscykelperspektiv med syfte att använda detta som utgångsläge i framtida arbete motklimatneutralitet. Livscykelanalysen genomfördes i SimaPro 8.4.0 och metoden EPD (2013)användes för utvärdering av potentiell miljöbelastning enligt EN 15804 standardiseringen. Resultaten från denna rapport är en utgångspunkt för vidare…
Subjects/Keywords: Life cycle assessment (LCA); Swedish Transport Administration (STA); STA Road Ferries; road ferry; environmental impact; environmental performance; ferry transport; Livscykelanalys (LCA); Trafikverket; Färjerederiet; vägfärja; miljöpåverkan; miljöprestanda; färjetransport; Engineering and Technology; Teknik och teknologier
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APA ·
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Manager
APA (6th Edition):
Ringström, A. (2019). Life Cycle Assessment of a Road Ferry. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253831
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ringström, Anna. “Life Cycle Assessment of a Road Ferry.” 2019. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253831.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ringström, Anna. “Life Cycle Assessment of a Road Ferry.” 2019. Web. 05 Dec 2019.
Vancouver:
Ringström A. Life Cycle Assessment of a Road Ferry. [Internet] [Thesis]. KTH; 2019. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253831.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ringström A. Life Cycle Assessment of a Road Ferry. [Thesis]. KTH; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253831
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
25.
Djikic, Addi.
Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks.
Degree: RPL, 2018, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235496
► Deep learning for safe autonomous transport is rapidly emerging. Fast and robust perception for autonomous vehicles will be crucial for future navigation in urban…
(more)
▼ Deep learning for safe autonomous transport is rapidly emerging. Fast and robust perception for autonomous vehicles will be crucial for future navigation in urban areas with high traffic and human interplay. Previous work focuses on extracting full image depth maps, or finding specific road features such as lanes. However, in urban environments lanes are not always present, and sensors such as LiDAR with 3D point clouds provide a quite sparse depth perception of road with demanding algorithmic approaches. In this thesis we derive a novel convolutional neural network that we call AutoNet. It is designed as an encoder-decoder network for pixel-wise depth estimation of an urban drivable free-space road, using only a monocular camera, and handled as a supervised regression problem. AutoNet is also constructed as a classification network to solely classify and segment the drivable free-space in real- time with monocular vision, handled as a supervised classification problem, which shows to be a simpler and more robust solution than the regression approach. We also implement the state of the art neural network ENet for comparison, which is designed for fast real-time semantic segmentation and fast inference speed. The evaluation shows that AutoNet outperforms ENet for every performance metrics, but shows to be slower in terms of frame rate. However, optimization techniques are proposed for future work, on how to advance the frame rate of the network while still maintaining the robustness and performance. All the training and evaluation is done on the Cityscapes dataset. New ground truth labels for road depth perception are created for training with a novel approach of fusing pre-computed depth maps with semantic labels. Data collection with a Scania vehicle is conducted, mounted with a monocular camera to test the final derived models. The proposed AutoNet shows promising state of the art performance in regards to road depth estimation as well as road classification.
Deep learning för säkra autonoma transportsystem framträder mer och mer inom forskning och utveckling. Snabb och robust uppfattning om miljön för autonoma fordon kommer att vara avgörande för framtida navigering inom stadsområden med stor trafiksampel. I denna avhandling härleder vi en ny form av ett neuralt nätverk som vi kallar AutoNet. Där nätverket är designat som en autoencoder för pixelvis djupskattning av den fria körbara vägytan för stadsområden, där nätverket endast använder sig av en monokulär kamera och dess bilder. Det föreslagna nätverket för djupskattning hanteras som ett regressions problem. AutoNet är även konstruerad som ett klassificeringsnätverk som endast ska klassificera och segmentera den körbara vägytan i realtid med monokulärt seende. Där detta är hanterat som ett övervakande klassificerings problem, som även visar sig vara en mer simpel och mer robust lösning för att hitta vägyta i stadsområden. Vi implementerar även ett av de främsta neurala nätverken ENet för jämförelse. ENet är…
Subjects/Keywords: AI; ANN; CNN; semantic; segmentation; autonomous; Scania; driving; road; pixel; classification; regression; real time; monocular; depth; estimation; convolutional; neural; networks; deep; learning; perception; camera; vehicles; supervised; tensorflow; Cityscapes; machine learning; autoencoder; decoder; encoder; Computer Vision and Robotics (Autonomous Systems); Datorseende och robotik (autonoma system)
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APA ·
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APA (6th Edition):
Djikic, A. (2018). Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235496
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Djikic, Addi. “Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks.” 2018. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235496.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Djikic, Addi. “Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks.” 2018. Web. 05 Dec 2019.
Vancouver:
Djikic A. Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks. [Internet] [Thesis]. KTH; 2018. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235496.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Djikic A. Segmentation and Depth Estimation of Urban Road Using Monocular Camera and Convolutional Neural Networks. [Thesis]. KTH; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235496
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
26.
Melhus, Christoffer.
Effects of microbial community coalescence in lake water at ice break-off.
Degree: 2019, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386529
► The period of ice break-off in spring is a key event for many biogeochemical processes in lakes globallly. The biogeochemical processes occurring at ice…
(more)
▼ The period of ice break-off in spring is a key event for many biogeochemical processes in lakes globallly. The biogeochemical processes occurring at ice break-off have the potential of influencing characteristics of lakes throughout spring and summer, including algal blooms and greenhouse gas emission. This makes it important to study lakes in the period of ice break-off. At ice break-off, soil bacteria from the catchment area usually enter the lake via spring floods and mix with the bacteria already occurring in the lake water. In this study, the effects of mixing soil- and lake microbial communities during ice break-off-like conditions were tested by performing an experiment under controlled conditions in the laboratory. In the experiment, light, microbial community composition and concentration of soil-derived organic matter were manipulated to simulate different conditions associated with ice break-off. The variables investigated were bacterial activity and functionality, measured as cell abundance and enzymatic activity, as well as primary production and concentration of dissolved organic matter. The results showed that a mix of soil and lake microbial communities had enzymatic activity patterns resembling lake communities, and then shifted to being more similar to soil communities. The experiment also showed that degradation of measured dissolved organic matter was not linked to biotic processes, and that the observed decrease was most likely due to photo degradation. Finally, the experiment showed that primary production, here measured as chlorophyll a, was only stimulated by the mixed community with light and added soil dissolved organic matter. The results found in this study are important as they show that microbial communities do alter their function and enzymatic activity based on composition. Furthermore, the result that primary production was only seen in the presence of light, soilderived organic matter and a mixed community of lake and soil bacteria may be seen as an indication that primary producers in lake ecosystems to some extent depend on the inflow of terrestrial microbes and organic matter. It also possible that the coalescence of microbial communities enables the communities to perform tasks they were unable to prior to coalescence (i.e. perform tasks that allows primary production to take place). These results give the basis for further, more detailed studies.
Subjects/Keywords: Freshwater lakes; ice break-off; microbial community coalescence; dissolved organic matter; microbial enzymatic activity; primary production; photo degradation.; Earth and Related Environmental Sciences; Geovetenskap och miljövetenskap
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APA (6th Edition):
Melhus, C. (2019). Effects of microbial community coalescence in lake water at ice break-off. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Melhus, Christoffer. “Effects of microbial community coalescence in lake water at ice break-off.” 2019. Thesis, Uppsala University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Melhus, Christoffer. “Effects of microbial community coalescence in lake water at ice break-off.” 2019. Web. 05 Dec 2019.
Vancouver:
Melhus C. Effects of microbial community coalescence in lake water at ice break-off. [Internet] [Thesis]. Uppsala University; 2019. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Melhus C. Effects of microbial community coalescence in lake water at ice break-off. [Thesis]. Uppsala University; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Linnaeus University
27.
Fagrell, Mimmi.
Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna.
Degree: Natural Sciences, 2011, Linnaeus University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-13122
► The purpose of this project work is to evaluate and update Saab Training Systems’ environmental objectives and to propose recommendations for its continuing environmental…
(more)
▼ The purpose of this project work is to evaluate and update Saab Training Systems’ environmental objectives and to propose recommendations for its continuing environmental work. Since the company is ISO 14001 certified the work is based on that standard. To be able to update the objectives and propose new ones; the environmental aspects where first updated. The results of the work are; an evaluation of the company’s current environmental objectives, new environmental aspects, new environmental objectives and some suggestions for its continual environmental work. The results follow the current aspects and objectives when it comes to disposition but the content is updated. The company does not have industrial manufacturing or other activities that is usually associated with environmental impact but it still affects the environment in many ways. The many differences and additions the results show compared to the company’s own aspects and objectives show that it can be a good thing to look at things from a new perspective.
Syftet med det här examensarbetet är att utvärdera och uppdatera Saab Training Systems miljömål samt att ge förslag för det fortsatta miljöarbetet. Företaget är ISO 14001 certifierat och arbetet bygger därför på den standarden. För att kunna uppdatera de befintliga miljömålen och föreslå nya uppdaterades först miljöaspekterna. Resultatet av arbetet är; en utvärdering av företagets nuvarande miljömål, nya miljöaspekter, nya miljömål samt vissa förslag för det fortsatta miljöarbetet. Resultaten följer de befintliga aspekterna och målen när det gäller disposition men innehållet är uppdaterat. Företaget bedriver ingen industriell tillverkning eller har någon annan verksamhet som vanligtvis förknippas med miljöpåverkan men det påverkar ändå miljön på många sätt. De många olikheter och tillägg resultatet visar jämfört med företagets egna aspekter och mål visar att det kan vara bra att se på saker från ett nytt perspektiv.
Subjects/Keywords: ISO 14001; environmental aspects; ISO 14001; miljöaspekter; NATURAL SCIENCES; NATURVETENSKAP
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APA (6th Edition):
Fagrell, M. (2011). Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna. (Thesis). Linnaeus University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-13122
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fagrell, Mimmi. “Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna.” 2011. Thesis, Linnaeus University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-13122.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fagrell, Mimmi. “Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna.” 2011. Web. 05 Dec 2019.
Vancouver:
Fagrell M. Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna. [Internet] [Thesis]. Linnaeus University; 2011. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-13122.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fagrell M. Evaluation and development of environmental aspects and objectives at Saab Training Systems, Huskvarna. [Thesis]. Linnaeus University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-13122
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Baez, Federico.
Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines.
Degree: Machine Design (Dept.), 2014, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156657
► The development of forestry machines is currently heading towards new solutions that reduce their impact on the environment and in particular on the soft…
(more)
▼ The development of forestry machines is currently heading towards new solutions that reduce their impact on the environment and in particular on the soft forest soil in which the machines operate. The terrain conditions that forestry machines encounter in their regular duties can be very rough, and if the vehicle-ground interaction is not properly controlled cumulative damage can progressively aggravate these conditions and potentially render a route or a zone impracticable, apart from causing a detrimental effect in the forest environment. In addition, new machine solutions must be considerably less damaging, both physically and mentally, to operators. There are certain imposed limits to the whole body vibrations to which industrial workers are exposed daily, which are very hard to fulfil in the context of wood harvesting operations with the current technological state of the machines. Chassis-suspended solutions in the market of forestry vehicles are practically inexistent. Multiple wheeled tracks and/or bogies are current solutions that improve dynamic performance and ground contact area of forestry vehicles, but they do not include suspension elements. Cab and seat suspensions are also used to reduce whole body vibrations, but they are only effective up to a certain degree, due to their relatively short stroke length and directional limitations. The implementation of chassis suspensions in forestry machines is therefore a very interesting open area of research in forestry technology. In this context the XT28, a forwarder prototype with active pendulum arm suspension, is currently being developed by Extractor AB in collaboration with Skogforsk; the Forestry Research Institute of Sweden. The present project focuses in analysis and comparison of the performance that active, semi-active and passive suspension systems with pendulum arm architecture would present, by studying their application in the XT28 machine. These systems have the potential to significantly improve forestry vehicle performance in terms of terrain friendliness and whole body vibrations over an unsuspended system. The task is carried out with the help of Multi-Body Dynamics simulation software along with other simulation and computational tools. Additionally, a general method to optimize and analyse forestry vehicle suspension performance is proposed and applied to the case of the XT28, which provides a fair and standardized way to compare the performance of the different suspensions. Keywords: Forestry machine, suspension, multi-objective optimization, forwarder, pendulum arm, active, semi-active, passive, XT28, Multibody Dynamics, soil-friendly, off-road.
Utvecklingen av skogsmaskiner är för närvarande på väg mot nya lösningar som minskar deras påverkan på miljön och i synnerhet på mjuk skogsmark. Skogsmaskinerna verkar ofta i mycket oländig och ojämn terräng, och om interaktionen mellan fordon och mark är alltför okontrollerad, så kan interaktionen ge upphov till kumulativa markskador som gradvis förvärras efter flera…
Subjects/Keywords: Forestry machine; suspension; multi-objective optimization; forwarder; pendulum arm; active; semi-active; passive; XT28; Multibody Dynamics; soil-friendly; off-road; Skogsmaskin; fjädring; optimering; skotare; pendelarm; aktiv; semi-aktiv; passiv; XT28; flerkroppsdynamik; markvänlig; off-road
…ground interaction was also
introduced, with great relevance in the area of heavy and off-road… …representative ground excitation have been
found in previous studies in the context of off-road… …vehicles: the use of a discrete amount of well
geometrically defined road excitations (… …6
2.3 SUSPENSION IN FORESTRY VEHICLES… …lack of an appropriate suspension, such as forestry vehicles and
some earth-moving…
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Baez, F. (2014). Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Baez, Federico. “Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines.” 2014. Thesis, KTH. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Baez, Federico. “Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines.” 2014. Web. 05 Dec 2019.
Vancouver:
Baez F. Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines. [Internet] [Thesis]. KTH; 2014. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Baez F. Multi-objective optimization and performance evaluation of active, semi-active and passive suspensions for forestry machines. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
29.
Westerlind, Rickard.
Faktorer för användningen av automatiserade fordon.
Degree: Informatics and Media, 2018, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353966
► Tekniska innovationer förknippas alltmer med modernt, utvecklade IT-komponenter i dagens samhällsutveckling. Detta framträder framförallt inom fordonsindustrin där självkörande/automatiserade fordon tagit ett rejält språng på…
(more)
▼ Tekniska innovationer förknippas alltmer med modernt, utvecklade IT-komponenter i dagens samhällsutveckling. Detta framträder framförallt inom fordonsindustrin där självkörande/automatiserade fordon tagit ett rejält språng på den globala fordonsmarknaden. Automatiserade fordon anses av många som framtidens teknik inom områden som framförallt berör kollektivtrafik och varutransporter, men visionen om en helt automatiserad trafik lämnas inte oberörd. Men då ny, främmande teknologi även kan ses som avskräckande för gemene man - vad krävs då för att ändra på detta synsätt? Hur kan det säkerställas att tekniska innovationer såsom automatiserade fordon accepteras av allmänheten och används i praktiken? Dessa är frågor som legat till grund för föreliggande rapport som syftat till att presentera en studie som undersöker vilka faktorer som har en inverkan på användningen av automatiserade fordon. Detta har genomförts genom en omfattande litteratursökning av tidigare och aktuell forskning inom ämnet, samt intervjuer och enkätundersökningar för att ta del av synpunkter och erfarenheter från befintliga användare av automatiserad teknologi. Forskningen har resulterat i en kunskapsprodukt som utgörs av en tabell innehållandes ovan nämnda faktorer med en kort beskrivning, typ av faktor, samt en motivering till varför de bedömts till att ha en inverkan på användningen av automatiserade fordon. Tabellen har därtill kompletterats av en relationsmodell som beskriver hur faktorer samverkar och är beroende av varandra. Resultatet ska med förhoppningar kunna användas som stöd till framtida studier och forskningsprojekt, samt ge inspiration till företag och organisationer som bedriver verksamhet med koppling till automatiserade fordon och dess användning.
Technological innovations are increasingly associated with modern, developed IT-capabilities in today’s societal evolution. This is seen primarily in the automobile industry where self-driving/automated vehicles has taken a great leap on the global automobile market. Automated vehicles are considered by many to be the technology of the future which mainly involves public transport and transport of goods, but the vision of a completely automated traffic is not left untouched. But because new, foreign technology also can be seen as detrimental to people - what is then required to change this approach? How can it be ensured that technical innovations such as automated vehicles are accepted by the public and used in practice? These are issues that gave rise to the following report with a purpose to present a study that investigates which factors that has an impact on the use of automated vehicles. This has been accomplished through an extensive literature search of previous and current research of the topic, along with interviews and surveys to acquire personal opinions and experiences from existing users of automated technology. The research has eventuated in a knowledge product represented by a table of above…
Subjects/Keywords: Selfdriving/automated vehicles; autonomous vehicles; factors; impact; usage; relational model; Självkörande/automatiserade fordon; autonoma fordon; faktorer; inverkan; användning; relat- ionsmodell; Information Systems, Social aspects; Systemvetenskap, informationssystem och informatik med samhällsvetenskaplig inriktning
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APA ·
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Export
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Manager
APA (6th Edition):
Westerlind, R. (2018). Faktorer för användningen av automatiserade fordon. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353966
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Westerlind, Rickard. “Faktorer för användningen av automatiserade fordon.” 2018. Thesis, Uppsala University. Accessed December 05, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353966.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Westerlind, Rickard. “Faktorer för användningen av automatiserade fordon.” 2018. Web. 05 Dec 2019.
Vancouver:
Westerlind R. Faktorer för användningen av automatiserade fordon. [Internet] [Thesis]. Uppsala University; 2018. [cited 2019 Dec 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353966.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Westerlind R. Faktorer för användningen av automatiserade fordon. [Thesis]. Uppsala University; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353966
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Swedish University of Agricultural Sciences
30.
Vestlund, Karin.
Aspects of automation of selective cleaning.
Degree: 2005, Swedish University of Agricultural Sciences
URL: http://pub.epsilon.slu.se/886/
► Cleaning (pre-commercial thinning) is a silvicultural operation, primarily used to improve growing conditions of remaining trees in young stands (ca. 3 - 5 m of…
(more)
▼ Cleaning (pre-commercial thinning) is a silvicultural operation, primarily used to improve growing conditions of remaining trees in young stands (ca. 3 - 5 m of height). Cleaning costs are considered high in Sweden and the work is laborious. Selective cleaning with autonomous artificial agents (robots) may rationalise the work, but requires new knowledge. This thesis aims to analyse key issues regarding automation of cleaning; suggesting general solutions and focusing on automatic selection of main-stems. The essential requests put on cleaning robots are to render acceptable results and to be cost competitive. They must be safe and be able to operate independently and unattended for several hours in a dynamic and non-deterministic environment. Machine vision, radar, and laser scanners are promising techniques for obstacle avoidance, tree identification, and tool control. Horizontal laser scannings were made, demonstrating the possibility to find stems and make estimations regarding their height and diameter. Knowledge regarding stem selections was retrieved through qualitative interviews with persons performing cleaning. They consider similar attributes of trees, and these findings and current cleaning manuals were used in combination with a field inventory in the development of a decision support system (DSS). The DSS selects stems by the attributes species, position, diameter, and damage. It was used to run computer-based simulations in a variety of young forests. A general follow-up showed that the DSS produced acceptable results. The DSS was further evaluated by comparing its selections with those made by experienced cleaners, and by a test in which laymen performed cleanings following the system. The DSS seems to be useful and flexible, since it can be adjusted in accordance with the cleaners’ results. The laymen’s results implied that the DSS is robust and that it could be used as a training tool. Using the DSS in automatic, or semi-automatic, cleaning operations should be possible if and when selected attributes can be automatically perceived. A suitable base-machine and thorough research, regarding e.g. safety, obstacle avoidance, and target identification, is needed to develop competitive robots. However, using the DSS as a training-tool for inexperienced cleaners could be an interesting option as of today.
Subjects/Keywords: forest stands; thinning; thinners; robots; automation; sweden; autonomous off-road vehicle; decision support system; interviews; robot; pre-commercial thinning; simulations; training-tool
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APA ·
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APA (6th Edition):
Vestlund, K. (2005). Aspects of automation of selective cleaning. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from http://pub.epsilon.slu.se/886/
Chicago Manual of Style (16th Edition):
Vestlund, Karin. “Aspects of automation of selective cleaning.” 2005. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed December 05, 2019.
http://pub.epsilon.slu.se/886/.
MLA Handbook (7th Edition):
Vestlund, Karin. “Aspects of automation of selective cleaning.” 2005. Web. 05 Dec 2019.
Vancouver:
Vestlund K. Aspects of automation of selective cleaning. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2005. [cited 2019 Dec 05].
Available from: http://pub.epsilon.slu.se/886/.
Council of Science Editors:
Vestlund K. Aspects of automation of selective cleaning. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2005. Available from: http://pub.epsilon.slu.se/886/
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Open Access Theses and Dissertations
