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Delft University of Technology
1.
Werkman, S.J.
Increasing Commitment in Collaborative Enterprise Modelling:.
Degree: 2011, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:13fbb9dd-5e86-4e4a-8e2f-2dfdb90ec16b 
► In Collaborative Enterprise Modelling, participation of stakeholders is seen as a key success factor. However, getting and keeping the right stakeholders involved during the modelling…
(more)
▼ In Collaborative Enterprise
Modelling, participation of stakeholders is seen as a key success factor. However, getting and keeping the right stakeholders involved during the
modelling process and obtaining acceptance and commitment to the results proves to be problematic in many Enterprise
Modelling projects. Main causes for typical problems in EM project are lack of user involvement and user input, incomplete or changing requirements, and lack of management support. In this research, a number of main elements of EM, which require stakeholder commitment are identified. These elements may either be associated with the actual intent to pursue the ensisioned goal or associated with insight in the business and (business) requirements, which determines the ‘required level of commitment’. Based on the mechanisms influencing the required level of commitment, recommendations are made to enhance stakeholder commitment to each of the main elements in EM that has been identified.
Advisors/Committee Members: Kolfschoten, G.L., Overbeek, S.J., Brazier, F.M..
Subjects/Keywords: Enterprise modelling; collaborative modelling; participative modelling; commitment
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APA (6th Edition):
Werkman, S. J. (2011). Increasing Commitment in Collaborative Enterprise Modelling:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:13fbb9dd-5e86-4e4a-8e2f-2dfdb90ec16b
Chicago Manual of Style (16th Edition):
Werkman, S J. “Increasing Commitment in Collaborative Enterprise Modelling:.” 2011. Masters Thesis, Delft University of Technology. Accessed February 27, 2020.
http://resolver.tudelft.nl/uuid:13fbb9dd-5e86-4e4a-8e2f-2dfdb90ec16b.
MLA Handbook (7th Edition):
Werkman, S J. “Increasing Commitment in Collaborative Enterprise Modelling:.” 2011. Web. 27 Feb 2020.
Vancouver:
Werkman SJ. Increasing Commitment in Collaborative Enterprise Modelling:. [Internet] [Masters thesis]. Delft University of Technology; 2011. [cited 2020 Feb 27].
Available from: http://resolver.tudelft.nl/uuid:13fbb9dd-5e86-4e4a-8e2f-2dfdb90ec16b.
Council of Science Editors:
Werkman SJ. Increasing Commitment in Collaborative Enterprise Modelling:. [Masters Thesis]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:13fbb9dd-5e86-4e4a-8e2f-2dfdb90ec16b
University of Cape Town
2.
Rama, Ritesh Rao.
Proper orthogonal decomposition with interpolation-based real-time modelling of the heart.
Degree: Image, Centre for Research in Computational and Applied Mechanics (CERECAM), 2017, University of Cape Town
URL: http://hdl.handle.net/11427/26859
► Several studies have been carried out recently with the aim of achieving cardiac modelling of the whole heart for a full heartbeat. However, within the…
(more)
▼ Several studies have been carried out recently with the aim of achieving cardiac
modelling of the whole heart for a full heartbeat. However, within the context of the Galerkin method, those simulations require high computational demand, ranging from 16 - 200 CPUs, and long calculation time, lasting from 1 h - 50 h. To solve this problem, this research proposes to make use of a Reduced Order Method (ROM) called the Proper Orthogonal Decomposition with Interpolation method (PODI) to achieve real-time
modelling with an adequate level of solution accuracy. The idea behind this method is to first construct a database of pre-computed full-scale solutions using the Element-free Galerkin method (EFG) and then project a selected subset of these solutions to a low dimensional space. Using the Moving Least Square method (MLS), an interpolation is carried out for the problem-at-hand, before the resulting coefficients are projected back to the original high dimensional solution space. The aim of this project is to tackle real-time
modelling of a patient-specific heart for a full heartbeat in different stages, namely:
modelling (i) the diastolic filling with variations of material properties, (ii) the isovolumetric contraction (IVC), ejection and isovolumetric relation (IVR) with arbitrary time evolutions, and (iii) variations in heart anatomy. For the diastolic filling, computations are carried out on a bi-ventricle model (BV) to investigate the performance and accuracy for varying the material parameters. The PODI calculations of the LV are completed within 14 s on a normal desktop machine with a relative L₂-error norm of 6x10⁻³. These calculations are about 2050 times faster than EFG, with each displacement step generated at a calculation frequency of 1074 Hz. An error sensitivity analysis is consequently carried out to find the most sensitive parameter and optimum dataset to be selected for the PODI calculation. In the second phase of the research, a so-called "time standardisation scheme" is adopted to model a full heartbeat cycle. This is due to the simulation of the IVC, ejection, and IVR phases being carried out using a displacement-driven calculation method which does not use uniform simulation steps across datasets. Generated results are accurate, with the PODI calculations being 2200 faster than EFG. The PODI method is, in the third phase of this work, extended to deal with arbitrary heart meshes by developing a method called "Degrees of freedom standardisation" (DOFS). DOFS consists of using a template mesh over which all dataset result fields are projected. Once the result fields are standardised, they are consequently used for the PODI calculation, before the PODI solution is projected back to the mesh of the problem-at-hand. The first template mesh to be considered is a cube mesh. However, it is found to produce results with high errors and non-physical behaviour. The second template mesh used is a heart template. In this case, a preprocessing step is required where a non-rigid transformation based on the coherent…
Advisors/Committee Members: Skatulla, Sebastian (advisor), Reddy, Daya (advisor).
Subjects/Keywords: cardiac modelling; Computational Heart Modelling
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APA (6th Edition):
Rama, R. R. (2017). Proper orthogonal decomposition with interpolation-based real-time modelling of the heart. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/26859
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):
Rama, Ritesh Rao. “Proper orthogonal decomposition with interpolation-based real-time modelling of the heart.” 2017. Thesis, University of Cape Town. Accessed February 27, 2020.
http://hdl.handle.net/11427/26859.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rama, Ritesh Rao. “Proper orthogonal decomposition with interpolation-based real-time modelling of the heart.” 2017. Web. 27 Feb 2020.
Vancouver:
Rama RR. Proper orthogonal decomposition with interpolation-based real-time modelling of the heart. [Internet] [Thesis]. University of Cape Town; 2017. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11427/26859.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rama RR. Proper orthogonal decomposition with interpolation-based real-time modelling of the heart. [Thesis]. University of Cape Town; 2017. Available from: http://hdl.handle.net/11427/26859
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
King Abdullah University of Science and Technology
3.
Abdel-Haleem, Alyaa M.
Comparative metabolic modeling and analysis of human pathogens.
Degree: 2019, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/656294
► Infectious diseases continue to be major health concerns worldwide. Although major advances have led to accumulation of genomic data about human pathogens, there clearly exists…
(more)
▼ Infectious diseases continue to be major health concerns worldwide. Although major advances have led to accumulation of genomic data about human pathogens, there clearly exists a gap between genome information and studies aiming at identifying potential drug targets. Here, constraint-based modeling (CBM) was deployed to integrate disparate data types with genome-scale metabolic models (GEMs) to advance our understanding of the pathogenesis of infectious agents with respect to identifying and prioritizing drug targets. Specifically, genome-scale metabolic modeling of multiple stages and species of Plasmodium, the causative agent of malaria, was used to prioritize potential drug targets that could be used to simultaneously treat (anti-malarials) and block transmission of the parasite. In addition, species-specific metabolic models were used to guide translation of findings from non-human experimental disease models to human-infecting species. Further, comparative analysis of the essentiality of metabolic genes for V. cholerae, the causative agent of cholera, growth and survival in single and co-infections with other enteric pathogens led to prioritizing conditionally independent essential genes that would be potential drug targets in both single and co-infection scenarios. Taken together, our findings highlight the utility of using genome-scale metabolic models to prioritize druggable targets that would be of broader spectrum against human pathogens.
Subjects/Keywords: Metabolism; Modelling; Pathogens; Computational Modelling
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APA (6th Edition):
Abdel-Haleem, A. M. (2019). Comparative metabolic modeling and analysis of human pathogens. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/656294
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):
Abdel-Haleem, Alyaa M. “Comparative metabolic modeling and analysis of human pathogens.” 2019. Thesis, King Abdullah University of Science and Technology. Accessed February 27, 2020.
http://hdl.handle.net/10754/656294.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abdel-Haleem, Alyaa M. “Comparative metabolic modeling and analysis of human pathogens.” 2019. Web. 27 Feb 2020.
Vancouver:
Abdel-Haleem AM. Comparative metabolic modeling and analysis of human pathogens. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2019. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10754/656294.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abdel-Haleem AM. Comparative metabolic modeling and analysis of human pathogens. [Thesis]. King Abdullah University of Science and Technology; 2019. Available from: http://hdl.handle.net/10754/656294
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
4.
Palocaren, Antony J.
Biomechanical modelling of tumor classification and
growth.
Degree: MS, Engineering Mechanics, 2011, Penn State University
URL: https://etda.libraries.psu.edu/catalog/11797
► Palpation is an important clinical diagnostic practice which is based on the fact that tumors tend to be stiffer than the surrounding normal tissue. None…
(more)
▼ Palpation is an important clinical diagnostic practice
which is based on the fact that tumors tend to be stiffer than the
surrounding normal tissue. None of the modern, non-invasive,
imaging modalities (such as CT scan, Magnetic Resonance Imaging, or
Ultrasound) used today by radiologists to find and diagnose tumors
provides the critical information about the stiffness of the imaged
tissues. The work presented in this thesis is based on the clinical
observation of palpation and focuses on testing the following
hypothesis: the Young’s modulus of tissues helps differentiating
not only between normal and abnormal tissues but, most importantly,
between benign (not cancerous) and malignant (cancerous) tumors. We
will show some preliminary results on tumor classification and
growth with the help of biomechanical modeling. First, we propose a
novel mechanical model of differentiating between benign and
malignant tumors based on their corresponding Young’s moduli
obtained using information about tissue microstructure provided by
imaging mass spectrometry. Imaging mass spectrometry is a new
technology that can provide a molecular assessment of tumor
progression and treatment obtained from biopsies, with the
potential to identify tumor subpopulations and predict patient
survival that is not evident based on the cellular phenotype
determined histologically. Our second biomechanical model shows how
the mechanical properties of tumors affect their growth. By
replacing the first order temporal derivative in this
mechano-growth model with a fractional order derivative we are able
to predict for the first time when a benign tumor turns into
cancer. We used the Adomian method to find analytic solutions to
the non-linear classic and fractional-order ordinary differential
equation corresponding to our second model.
Subjects/Keywords: tumor modelling
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APA (6th Edition):
Palocaren, A. J. (2011). Biomechanical modelling of tumor classification and
growth. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11797
Chicago Manual of Style (16th Edition):
Palocaren, Antony J. “Biomechanical modelling of tumor classification and
growth.” 2011. Masters Thesis, Penn State University. Accessed February 27, 2020.
https://etda.libraries.psu.edu/catalog/11797.
MLA Handbook (7th Edition):
Palocaren, Antony J. “Biomechanical modelling of tumor classification and
growth.” 2011. Web. 27 Feb 2020.
Vancouver:
Palocaren AJ. Biomechanical modelling of tumor classification and
growth. [Internet] [Masters thesis]. Penn State University; 2011. [cited 2020 Feb 27].
Available from: https://etda.libraries.psu.edu/catalog/11797.
Council of Science Editors:
Palocaren AJ. Biomechanical modelling of tumor classification and
growth. [Masters Thesis]. Penn State University; 2011. Available from: https://etda.libraries.psu.edu/catalog/11797
University of Manchester
5.
Choi, Cecilia.
A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell.
Degree: 2011, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:110633
► While premature birth is still one of the major clinical problems worldwide, theexact physiological mechanisms underlying myometrium activity during pregnancyremain unclear. In this thesis, a…
(more)
▼ While premature birth is still one of the major
clinical problems worldwide, theexact physiological mechanisms
underlying myometrium activity during pregnancyremain unclear. In
this thesis, a novel biophysically detailed model wasconstructed
using available experimental data to simulate chemical, electrical
andmechanical activity in a late pregnant rat uterine myocycte. The
developed modelhas been used to elucidate the ionic mechanism
underlying myometrium functionality,providing better insights in
the function of the uterus during pregnancy. Themodel consisted of
15 membrane currents, intracellular calcium handling processcoupled
with a sliding actin-myosin filament mechanical model to describe
uterinebehaviour and contractile activity at the single myocyte
level. Each of theionic currents were modelled using
Hodgkin-Huxley-type equations. The simulatedcurrent traces and
current-voltage curves were validated with experimentalrecordings
and the model was further validated by the ability to produce a
burstingaction potential (AP) during an external stimulus. The
model replicated theeffects of estradiol during pregnancy,
modulating the amplitude and activationproperties of individual
Ca2+ and K+ currents, therefore altering the AP configurationto a
tonic-like plateau. The model also reproduced the actions of
drugsto inhibit certain channels to investigate their roles in
myometrium. Sensitivityanalysis was performed to examine the
model’s behaviour to changing parameters.A simple 1-D study was
conducted to investigate how electrical signals propagatealong
strand of cells. Although the model successfully replicated results
similarto recordings seen in the experiments, limitations have to
be addressed and morestudies have to be carried out to further
improve the model.
Advisors/Committee Members: Zhang, Henggui.
Subjects/Keywords: Uterus; Modelling
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APA ·
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Manager
APA (6th Edition):
Choi, C. (2011). A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:110633
Chicago Manual of Style (16th Edition):
Choi, Cecilia. “A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 27, 2020.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:110633.
MLA Handbook (7th Edition):
Choi, Cecilia. “A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell.” 2011. Web. 27 Feb 2020.
Vancouver:
Choi C. A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2020 Feb 27].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:110633.
Council of Science Editors:
Choi C. A biophysically detailed mathematical model of a single
late pregnant rat myometrial cell. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:110633
Open Universiteit Nederland
6.
Kwisthout, Johan.
Modelling Uncertainty in 3APL
.
Degree: 2012, Open Universiteit Nederland
URL: http://hdl.handle.net/1820/4054
► In this thesis, the author investigates how the agent programming language 3APL can be enhanced to model uncertainty. Typically, agent programming languages such as 3APL…
(more)
▼ In this thesis, the author investigates how the agent programming language 3APL can be enhanced to model uncertainty. Typically, agent programming languages such as 3APL that are based on beliefs, goals and intentions use logical formulae to represent their beliefs and reason on them. These formulae are either true or false (i.e. they are believed or not), and this limits the use of such agent programming languages in practical applications. While a lot of research has been done on the topic of reasoning with uncertainty the possible use of these methods in the field of agent programming languages such as 3APL has not been given much attention. The author investigates several methods (with a focus on Bayesian networks and Dempster-Shafer theory), and show that Dempster-Shafer theory is a promising method to use in agent programming. Particulary appealing in this theory is the ability to model ignorance, as well as uncertainty. Nevertheless, the combinatorial explosion of its combination rule and the issue of inconsistency (which are addressed in the thesis) are serious disadvantages of this theory for its practical application to agent programming. The author investigates a possible mapping of Dempster-Shafer sets to belief formulae in 3APL. With restrictions on the mass functions and on the frame of discernment, Dempster-Shafer theory is a convenient way to model uncertainty in agent beliefs. Because, with certain restrictions, mass values can be computed based on the beliefs in the belief base, we do not need to keep a combined mass function of n beliefs in memory and update it with each belief update. Therefore there is no combinational explosion. The author proposes a syntax and semantics for 3APL with uncertainty, and demonstrate a prototype Prolog implementation of the calculation of the certainty of a logical formula given a certain belief base.
Subjects/Keywords: Modelling;
3APL
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Manager
APA (6th Edition):
Kwisthout, J. (2012). Modelling Uncertainty in 3APL
. (Masters Thesis). Open Universiteit Nederland. Retrieved from http://hdl.handle.net/1820/4054
Chicago Manual of Style (16th Edition):
Kwisthout, Johan. “Modelling Uncertainty in 3APL
.” 2012. Masters Thesis, Open Universiteit Nederland. Accessed February 27, 2020.
http://hdl.handle.net/1820/4054.
MLA Handbook (7th Edition):
Kwisthout, Johan. “Modelling Uncertainty in 3APL
.” 2012. Web. 27 Feb 2020.
Vancouver:
Kwisthout J. Modelling Uncertainty in 3APL
. [Internet] [Masters thesis]. Open Universiteit Nederland; 2012. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/1820/4054.
Council of Science Editors:
Kwisthout J. Modelling Uncertainty in 3APL
. [Masters Thesis]. Open Universiteit Nederland; 2012. Available from: http://hdl.handle.net/1820/4054
University of Debrecen
7.
Obaseki, Ehimwenma Valerie.
Modelling Analysis Of A Call Center
.
Degree: DE – TEK – Informatikai Kar, 2013, University of Debrecen
URL: http://hdl.handle.net/2437/169192
► A call center offers telephone based services. An illustration of the traffic flow has been shown. Incoming calls waiting to be serviced by c identical…
(more)
▼ A call center offers telephone based services. An illustration of the traffic flow has been shown. Incoming calls waiting to be serviced by c identical agent. All these are connected to the ACD(Automatic Call Distributor) which handles the queue,stores operational data and directs calls to the available agents. Queuing models have be shown and the visibility of it’s application to call centers were also analyzed. Emphasis were made on some queuing models. It is very important to note the importance of queuing models when it’s related to call center model because it helps with various calculation of the waiting time,service level,arival rate,staffing etc. All these mentioned are the instruments used to analyze a call center
modelling.
Advisors/Committee Members: Sztrik, Janos (advisor).
Subjects/Keywords: Modelling;
Queuing
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APA ·
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Manager
APA (6th Edition):
Obaseki, E. V. (2013). Modelling Analysis Of A Call Center
. (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/169192
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):
Obaseki, Ehimwenma Valerie. “Modelling Analysis Of A Call Center
.” 2013. Thesis, University of Debrecen. Accessed February 27, 2020.
http://hdl.handle.net/2437/169192.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Obaseki, Ehimwenma Valerie. “Modelling Analysis Of A Call Center
.” 2013. Web. 27 Feb 2020.
Vancouver:
Obaseki EV. Modelling Analysis Of A Call Center
. [Internet] [Thesis]. University of Debrecen; 2013. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/2437/169192.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Obaseki EV. Modelling Analysis Of A Call Center
. [Thesis]. University of Debrecen; 2013. Available from: http://hdl.handle.net/2437/169192
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waikato
8.
Mallett, Ryan James.
Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
.
Degree: 2015, University of Waikato
URL: http://hdl.handle.net/10289/9681
► Land conversion from native vegetation to agriculture has been widespread in New Zealand over the past century. The resulting increases in nutrient runoff have led…
(more)
▼ Land conversion from native vegetation to agriculture has been widespread in New Zealand over the past century. The resulting increases in nutrient runoff have led to eutrophication of many lakes and have resulted in harmful algal blooms, deoxygenation of hypolimnetic waters, and reductions in biodiversity. These problems occur in many of the Rotorua lakes including Lake Okaro, which is the most degraded of the twelve lakes. The lake has been
subject to numerous restoration efforts over the past decade (2005-2014).
In this study, I linked a catchment and a lake model to address questions around the efficacy of restoration measures. The model was also used to compare the relative benefits of catchment and in-lake restoration actions on lake trophic status. The catchment model INCA (Integrated Nitrogen Catchment model) was applied to the Okaro catchment. The output from INCA was linked to a lake water quality model DYRESM-CAEDYM (DYCD). Catchment model simulations with INCA provided a satisfactory fit to measured discharge values in the two inflow streams (Pearson R=0.77-0.82). The model adequately simulated the major variations in nitrate (NO₃), total phosphorus (TP) and soluble reactive phosphorus (SRP). However, ammonium (NH4) concentrations were not represented well for both the calibration and validation phases of the assessment.
Three scenarios were simulated using the calibrated version of INCA. This model was implemented to investigate the effectiveness of the artificial wetland (established 2006) and associated riparian planting by removing it in the catchment model simulation. Another scenario included fertiliser reductions and a third was to convert all pastoral land to dairy farming. The scenario involving the removal of the wetland/riparian area resulted in increases in total and dissolved nutrients. The fertiliser reduction simulations resulted in decreased NH4 and SRP, both of which are a major input to dry-stock and dairy farms. The conversion of all existing pastoral land to dairy farming resulted in a 160% increase in NO3-N concentrations while SRP increased by 500%.
The inputs from the INCA model were fed into the DYCD inflow file and compared with the previous analysis performed by Özkundakci et al. (2011). The calibrated model based on INCA inputs represented an improvement over earlier published versions as a result of continuous simulation of catchment inputs and enhanced calibration. The Trophic Level Index (TLI) was used to represent water quality changes in the lake in response to the different catchment management scenarios. The wetland/riparian removal increased TLI, with higher total nitrogen (TN) and total phosphorus (TP) concentrations in the surface and hypolimnetic waters, in addition to increased chlorophyll a concentrations in the surface waters. Average TLI for this scenario was 5.21, slightly greater (i.e. increased trophic status) from the baseline scenario result of 5.17. The fertiliser reduction scenario showed decreases in TN (average 26.9 mg m⁻³) over the seven-year time…
Advisors/Committee Members: Hamilton, David P (advisor), Jones, Hannah Frances Emily (advisor).
Subjects/Keywords: Modelling;
Eutrophic
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mallett, R. J. (2015). Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/9681
Chicago Manual of Style (16th Edition):
Mallett, Ryan James. “Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
.” 2015. Masters Thesis, University of Waikato. Accessed February 27, 2020.
http://hdl.handle.net/10289/9681.
MLA Handbook (7th Edition):
Mallett, Ryan James. “Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
.” 2015. Web. 27 Feb 2020.
Vancouver:
Mallett RJ. Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
. [Internet] [Masters thesis]. University of Waikato; 2015. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10289/9681.
Council of Science Editors:
Mallett RJ. Modelling the efficacy of in-lake and catchment remediation actions for restoration of a small, eutrophic lake
. [Masters Thesis]. University of Waikato; 2015. Available from: http://hdl.handle.net/10289/9681
University of Waterloo
9.
Chen, Xinling.
Embroidery Modelling and Rendering.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/6056
► Embroidery is a traditional non-photorealistic art form in which threads of different colours stitched into a base material are used to create an image. This…
(more)
▼ Embroidery is a traditional non-photorealistic art form in which threads of different colours stitched into a base material are used to create an image. This thesis presents techniques for automatically producing embroidery layouts from line drawings and for rendering those layouts in real time on potentially deformable 3D objects with hardware acceleration. Layout of stitches is based on automatic extraction of contours from line drawings followed by a set of stitch-placement procedures based on traditional embroidery techniques. Rendering first captures the lighting environment on the surface of the target object and renders it as an image in texture space. Stitches are rendered in this space using a lighting model suitable for threads at a resolution that avoids geometric and highlight aliasing. It is also possible to render stitches in layers to capture the 2.5D nature of embroidery. A filtered texture pyramid is constructed from the resulting texture and applied to the 3D object. Aliasing of fine stitch structure and highlights is avoided by this process. The result is a realistic embroidered image that properly responds to lighting.
Subjects/Keywords: Rendering; Modelling
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APA (6th Edition):
Chen, X. (2011). Embroidery Modelling and Rendering. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6056
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):
Chen, Xinling. “Embroidery Modelling and Rendering.” 2011. Thesis, University of Waterloo. Accessed February 27, 2020.
http://hdl.handle.net/10012/6056.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Xinling. “Embroidery Modelling and Rendering.” 2011. Web. 27 Feb 2020.
Vancouver:
Chen X. Embroidery Modelling and Rendering. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10012/6056.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen X. Embroidery Modelling and Rendering. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/6056
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Université de Neuchâtel
10.
Kurpicz-Briki, Mascha.
Multi-level energy efficiency for heterogeneous data
centers.
Degree: 2016, Université de Neuchâtel
URL: http://doc.rero.ch/record/278534
► Le secteur des TIC (Technologies de l'Information et de la Communication) est grand consommateur d'énergie (assemblage d'appareils, constructions de réseaux, opérations, refroidissement et autres). Des…
(more)
▼ Le secteur des TIC (Technologies de l'Information et
de la Communication) est grand consommateur d'énergie (assemblage
d'appareils, constructions de réseaux, opérations, refroidissement
et autres). Des études montrent que l'ensemble des activités de
l'informatique en nuage consomme plus d'énergie que des pays
entiers comme l'Allemagne ou l'Inde. De plus, des estimations
récentes montrent que le secteur de l'informatique en nuage, et
donc l'énergie consommée par les centres de données sur lesquels
elle repose, est encore en croissance. Dans cette thèse,
je développe des approches pour faciliter la consommation
énergétique responsable des centres de données hétérogènes et par
conséquent réduire la consommation d'énergie globale du secteur des
TIC. Pour faciliter la consommation énergétique responsable, il
faut savoir combien d'énergie est consommée. Ceci est influencé par
l'infrastructure, mais aussi par chaque application qui tourne dans
le centre de données. Malheureusement, on ne peut pas appliquer un
wattmètre à une application. Pour contourner cette limitation,
cette thèse propose des modèles réalistes pour estimer la
consommation énergétique à plusieurs niveaux. Cette thèse
est organisée comme une pile à 3 niveaux: (1) centre de données,
(2) virtualisation, (3) applications clientes. Au premier niveau
des centres de données nous commençons par une première phase
d'étude de l'influence de l'hétérogénéité matérielle sur la
consommation de puissance des applications. Dans une deuxième
phase, nous développons EPAVE, un modèle pour la facturation
proportionnelle à l'énergie dans les environnements virtualisés.
EPAVE est supporté par PowerIndex, un framework pour le profilage
et l'estimation d'énergie. Au deuxième niveau de la virtualisation
nous présentons BitWatts, un outil middleware pour construire des
wattmètres logiciels. Avec BitWatts, on franchit la barrière des
environnements virtualisés pour proposer une estimation de
consommation pour des applications s'exécutant au sein de machines
virtuelles. Enfin, au troisième niveau, nous modélisons les
batteries d'appareils mobiles et proposons une approche pour
prolonger leur durée de vie.
Advisors/Committee Members: Pascal (Dir.), Anita (Codir.).
Subjects/Keywords: battery modelling
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APA (6th Edition):
Kurpicz-Briki, M. (2016). Multi-level energy efficiency for heterogeneous data
centers. (Thesis). Université de Neuchâtel. Retrieved from http://doc.rero.ch/record/278534
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):
Kurpicz-Briki, Mascha. “Multi-level energy efficiency for heterogeneous data
centers.” 2016. Thesis, Université de Neuchâtel. Accessed February 27, 2020.
http://doc.rero.ch/record/278534.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kurpicz-Briki, Mascha. “Multi-level energy efficiency for heterogeneous data
centers.” 2016. Web. 27 Feb 2020.
Vancouver:
Kurpicz-Briki M. Multi-level energy efficiency for heterogeneous data
centers. [Internet] [Thesis]. Université de Neuchâtel; 2016. [cited 2020 Feb 27].
Available from: http://doc.rero.ch/record/278534.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kurpicz-Briki M. Multi-level energy efficiency for heterogeneous data
centers. [Thesis]. Université de Neuchâtel; 2016. Available from: http://doc.rero.ch/record/278534
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
11.
Rydberg, Lova.
RTDS modelling of battery energy storage system.
Degree: Electricity, 2011, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155960
► This thesis describes the development of a simplified model of a battery energy storage. The battery energy storage is part of the ABB energy…
(more)
▼ This thesis describes the development of a simplified model of a battery energy storage. The battery energy storage is part of the ABB energy storage system DynaPeaQ®. The model has been built to be run in RTDS, a real time digital simulator. Batteries can be represented by equivalent electric circuits, built up of e.g voltage sources and resistances. The magnitude of the components in an equivalent circuit varies with a number of parameters, e.g. state of charge of the battery and current flow through the battery. In order to get a model of how the resistive behaviour of the batteries is influenced by various parameters, a number of simulations have been run on a Matlab/Simulink model provided by the battery manufacturer. This model is implemented as a black box with certain inputs and outputs, and simulates the battery behaviour. From the simulation results a set of equations have been derived, which approximately give the battery resistance under different operational conditions. The equations have been integrated in the RTDS model, together with a number of controls to calculate e.g. state of charge of the batteries and battery temperature. Results from the RTDS model have been compared with results from the Simulink model. The results coincide reasonably well for the conditions tested. However, further testing is needed to ensure that the RTDS model produces results similar enough to the ones from the Simulink model, over the entire operational range.
Subjects/Keywords: battery modelling
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APA (6th Edition):
Rydberg, L. (2011). RTDS modelling of battery energy storage system. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155960
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):
Rydberg, Lova. “RTDS modelling of battery energy storage system.” 2011. Thesis, Uppsala University. Accessed February 27, 2020.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155960.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rydberg, Lova. “RTDS modelling of battery energy storage system.” 2011. Web. 27 Feb 2020.
Vancouver:
Rydberg L. RTDS modelling of battery energy storage system. [Internet] [Thesis]. Uppsala University; 2011. [cited 2020 Feb 27].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155960.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rydberg L. RTDS modelling of battery energy storage system. [Thesis]. Uppsala University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155960
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Exeter
12.
Evans, Barry.
A multilayered approach to two-dimensional urban flood modelling.
Degree: PhD, 2010, University of Exeter
URL: http://hdl.handle.net/10036/117891
► With urbanisation continuing to encroach upon flood plains, the constant replacement of permeable land with impermeable surfaces and with the changes in global climate, the…
(more)
▼ With urbanisation continuing to encroach upon flood plains, the constant replacement of permeable land with impermeable surfaces and with the changes in global climate, the need for improved flood modelling is ever more apparent. A wide range of methods exist that simulate surface flow; most commonly in one-dimensional (1D) or twodimensional (2D), and more recently on smaller scales in three-dimensional (3D) models. In urban flood modelling, 2D models are often the preferred choice as they can simulate surface flow more accurately than their 1D model counterparts; they are, however, more computationally demanding and thereby usually require greater simulation time. With the vast amount of information used in flood modelling, generalisation techniques are often employed to reduce the computational load within a simulation. The objective of this thesis is to improve 2D flood modelling in urban environments by introducing a new and novel approach of representing fine scale building features within coarse grids. This is achieved by creating an automated approach that data-mines key features such as buildings and represents their effects numerically within a multiple layer grid format. This new approach is tested in comparison to two other, already established generalising techniques which are single layer based. The effectiveness of each model is assessed by its ability to accurately represent surface flow at different grid resolutions and how each copes with varying building orientations and distributions within the test datasets. The performance of each generalising approach is determined therefore by its accuracy in relation to the fine scale model and the difference in the computational time required complete the simulation. Finally the multilayered methodology is applied to a real case scenario to test its applicability further. Overall it revealed, as predicted, that the multilayered approach enables far greater accuracies at routing surface flow within coarse grids whilst still greatly reducing computational time. As a further benefit in urban flood modelling, this thesis shows that using a multilayered data format it is possible to simulate the influence of features that have a grid resolution finer than the initial terrain topology data, thus enabling, for example, the routing of surface water through alleyways between buildings that have a width less than one meter.
Subjects/Keywords: 551.4; Multilayer : Modelling : GIS : Urban Flood Modelling
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APA (6th Edition):
Evans, B. (2010). A multilayered approach to two-dimensional urban flood modelling. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10036/117891
Chicago Manual of Style (16th Edition):
Evans, Barry. “A multilayered approach to two-dimensional urban flood modelling.” 2010. Doctoral Dissertation, University of Exeter. Accessed February 27, 2020.
http://hdl.handle.net/10036/117891.
MLA Handbook (7th Edition):
Evans, Barry. “A multilayered approach to two-dimensional urban flood modelling.” 2010. Web. 27 Feb 2020.
Vancouver:
Evans B. A multilayered approach to two-dimensional urban flood modelling. [Internet] [Doctoral dissertation]. University of Exeter; 2010. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10036/117891.
Council of Science Editors:
Evans B. A multilayered approach to two-dimensional urban flood modelling. [Doctoral Dissertation]. University of Exeter; 2010. Available from: http://hdl.handle.net/10036/117891
University of Melbourne
13.
Norling, Emma Jane.
Modelling human behaviour with BDI agents.
Degree: 2009, University of Melbourne
URL: http://hdl.handle.net/11343/37081
► Although the BDI framework was not designed for human modelling applications, it has been used with considerable success in this area. The work presented here…
(more)
▼ Although the BDI framework was not designed for human modelling applications, it has been used with considerable success in this area. The work presented here examines some of these applications to identify the strengths and weaknesses of the use of BDI-based frameworks for this purpose, and demonstrates how these weaknesses can be addressed while preserving the strengths. The key strength that is identified is the framework's folk-psychological roots, which facilitate the knowledge acquisition and representation process when building models. Unsurprisingly, because the framework was not designed for this purpose, several shortcomings are also identified. These fall into three different classes.
Firstly, although the folk-psychological roots mean that the framework captures a human-like reasoning process, it is at a very abstract level. There are many generic aspects of human behaviour - things that are common to all people across all tasks - which are not captured in the framework. If a modeller wishes to take these things into account in a model, they must explicitly encode them, replicating this effort for every model. To reduce modellers' workload and increase consistency, it is desirable to incorporate such features into the framework.
Secondly, although the folk-psychological roots facilitate knowledge acquisition, there is no standardised approach to this process, and without experience it can be very difficult to gather the appropriate knowledge from the subjects to design and build models. And finally, these models must interface with external environments in which they 'exist.' There are often mismatches in the data representation level which hinder this process. This work makes contributions to dealing with each of these problems, drawing largely on the folk-psychological roots that underpin the framework. The major contribution is to present a systematic approach to extending the BDI framework to incorporate further generic aspects of human behaviour and to demonstrate this approach with two different extensions. A further contribution is to present a knowledge acquisition methodology which gives modellers a structured approach to this process. The problems at the agent-environment interface are not straightforward to solve, because sometimes the problem lies in the way that the environment accepts and receives data. Rather than offering the golden solution to this problem, the contribution provided here is to highlight the different types of mismatches that may occur, so that modellers may recognise them early and adapt their approach to accommodate them.
Subjects/Keywords: human modelling; agent-based modelling; BDI agents
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APA (6th Edition):
Norling, E. J. (2009). Modelling human behaviour with BDI agents. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/37081
Chicago Manual of Style (16th Edition):
Norling, Emma Jane. “Modelling human behaviour with BDI agents.” 2009. Doctoral Dissertation, University of Melbourne. Accessed February 27, 2020.
http://hdl.handle.net/11343/37081.
MLA Handbook (7th Edition):
Norling, Emma Jane. “Modelling human behaviour with BDI agents.” 2009. Web. 27 Feb 2020.
Vancouver:
Norling EJ. Modelling human behaviour with BDI agents. [Internet] [Doctoral dissertation]. University of Melbourne; 2009. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11343/37081.
Council of Science Editors:
Norling EJ. Modelling human behaviour with BDI agents. [Doctoral Dissertation]. University of Melbourne; 2009. Available from: http://hdl.handle.net/11343/37081
University of Waterloo
14.
Brown, Peter.
Contact Modelling for Forward Dynamics of Human Motion.
Degree: 2017, University of Waterloo
URL: http://hdl.handle.net/10012/11315
► Multibody forward dynamics models of the human body are often used in predictive simulations of human motion. An important component of these models is contact…
(more)
▼ Multibody forward dynamics models of the human body are often used in predictive simulations of human motion. An important component of these models is contact modelling. For example, foot-ground contact plays a crucial role in obtaining accurate results from a walking or running simulation and contact models of joints are necessary to determine accurate joint pressures.
Contact models increase multibody system equation complexity (often dramatically) and can introduce nonlinearities and discontinuities into the system equations. This is particularly problematic in predictive simulations, which may determine optimal performance by running a model simulation thousands of times. A desirable contact model should be accurate enough to recreate physiological motion and contact pressures yet still efficient enough to use in an optimisation.
A suitable contact model for multibody biomechanics is volumetric contact modelling. Volumetric contact modelling is ideally suited for large, conforming contacts, as is found in biomechanic applications, and has relatively simple, analytical equations (provided the contact surfaces can be approximated as simplified shapes). Another advantage is that volumetric contact can be used to calculate contact pressure, which is difficult to do with simpler point-contact models. In this thesis, volumetric contact was used in two biomechanics models to test its applicability: an anatomical knee model with tibiofemoral contact and a foot-ground contact model.
The volumetric knee model was based on another knee model in the literature, with the contact model replaced with volumetric contact. The volumetric model ran faster than real-time and had similar contact forces to the original model. Further improvements are possible by using medical images to determine the contact geometry and including muscles in the model.
A friction model is an important part of some biomechanic contact models, particularly the foot-ground contact model. A literature review revealed that many current friction models introduce discontinuities into system equations or are unnecessarily complex. A novel continuous friction model was developed which uses a minimum number of parameters for easy parametrisation.
A novel, three-dimensional foot-ground contact model was developed and validated, for future use in a human gait simulation. The foot model used volumetric contact equations for ellipsoidal geometry (which were derived in this thesis, as an improvement on previous sphere-plane contact models). A gait experiment was used to parametrise and validate the model (except for the friction parameters). The model ran over 100 times faster than real-time (in an inverse simulation) and matched experimental normal force and centre of pressure location (with less than 7% root-mean-square error).
It was discovered that the designed gait experiment could not be used to determine the friction parameters for the foot-ground model. A possible alternative was suggested, and the validation of the friction portion of the…
Subjects/Keywords: multibody dynamics; biomechanics; contact modelling; friction modelling
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APA (6th Edition):
Brown, P. (2017). Contact Modelling for Forward Dynamics of Human Motion. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11315
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):
Brown, Peter. “Contact Modelling for Forward Dynamics of Human Motion.” 2017. Thesis, University of Waterloo. Accessed February 27, 2020.
http://hdl.handle.net/10012/11315.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brown, Peter. “Contact Modelling for Forward Dynamics of Human Motion.” 2017. Web. 27 Feb 2020.
Vancouver:
Brown P. Contact Modelling for Forward Dynamics of Human Motion. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10012/11315.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brown P. Contact Modelling for Forward Dynamics of Human Motion. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/11315
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
15.
Ouyang, Han.
Near real time 3D ionospheric modelling with multi-satellite data.
Degree: Surveying & Spatial Information Systems, 2010, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/50181
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9059/SOURCE02?view=true
► The ionosphere is an atmospheric region, which includes a significant number of free thermal electrons and ions located at altitudes of 60km to beyond 1000km…
(more)
▼ The ionosphere is an atmospheric region, which includes a significant number of free thermal electrons and ions located at altitudes of 60km to beyond 1000km above the Earth. The ionosphere can act as the media for long-distance propagation of electromagnetic waves. On the other hand, it also simultaneously disturbs the transmission of these radio signals. Therefore, not only the features of the ionosphere need to be thoroughly studied, but also it is necessary to monitor and predict the ionosphere in near real time through effective ionospheric-detecting instruments and models. Nowadays, it is still a challenging issue to build up accurate and easy-to-use ionospheric models because of the ionospheric variability and lack of very effective instrumentation. The drawbacks of many currently used ionospheric models include: 1) they need to simultaneously combine many different data sources e.g., Global Positioning System (GPS) data, radio occultation (RO) data, data from in situ measurement (i.e., ionosondes, the incoherent scatter radar, the relative ionospheric opacity meter) and the data from the airglow radiances, etc. However, because some of these data sources are difficult to obtain at many target locations at the expected time, it will limit the widespread use of these ionospheric models; 2) based on some special conditions and prior assumptions (or
modelling parameters), some of the ionospheric models are accurate. However, when these conditions and parameters change, the model bias may become large and can make the results unsuitable; 3) some kinds of the models only express the ionospheric distribution in a wide area. It may generate a large bias when they are used in a specific location. The major contributions of this study are summarised as follows:(1) Four novel models, which can retrieve electron densities using fewer data sources, are proposed as below:a) A method is proposed to model the electron density bias (with location dependence) generated by the Abel inversion algorithm. When the calculated bias is removed, the accuracy of the retrieved vertical electron density (VED) can be improved. This method only needs a RO event data to generate a more accurate VED profile.b) The electron density is firstly modeled with the parameters of altitude and the zenith angle (with regard to the local centre), and then it is estimated by the tomographic ART (Algebraic Reconstruction Technique) algorithms using the GPS data from a RO event and a ground-based receiver.c) In the ionospheric Shape Function model, the Shape Function is proposed to be altitude and location dependence rather than only altitude dependence (as that in the classic Shape Function model). This Shape Function can be solved by using the GPS data from a RO event and a ground-based receiver.d) The electron density is firstly modeled with the parameters of altitude, the zenith and azimuth angles (with regard to the local centre, and then it is estimated separately by the tomographic ART (Algebraic Reconstruction Technique), the MART (Multiplicative…
Advisors/Committee Members: Wang, Jinling, Faculty of Engineering, UNSW, Lim, Samsung, Faculty of Engineering, UNSW, Cole, David, Australian IPS.
Subjects/Keywords: Ionospheric Modelling; Quality control for TEC modelling
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APA (6th Edition):
Ouyang, H. (2010). Near real time 3D ionospheric modelling with multi-satellite data. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/50181 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9059/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Ouyang, Han. “Near real time 3D ionospheric modelling with multi-satellite data.” 2010. Doctoral Dissertation, University of New South Wales. Accessed February 27, 2020.
http://handle.unsw.edu.au/1959.4/50181 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9059/SOURCE02?view=true.
MLA Handbook (7th Edition):
Ouyang, Han. “Near real time 3D ionospheric modelling with multi-satellite data.” 2010. Web. 27 Feb 2020.
Vancouver:
Ouyang H. Near real time 3D ionospheric modelling with multi-satellite data. [Internet] [Doctoral dissertation]. University of New South Wales; 2010. [cited 2020 Feb 27].
Available from: http://handle.unsw.edu.au/1959.4/50181 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9059/SOURCE02?view=true.
Council of Science Editors:
Ouyang H. Near real time 3D ionospheric modelling with multi-satellite data. [Doctoral Dissertation]. University of New South Wales; 2010. Available from: http://handle.unsw.edu.au/1959.4/50181 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9059/SOURCE02?view=true
University of Western Ontario
16.
Chambers, Spencer B.
The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation.
Degree: 2019, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/6707
► Scaphoid fractures are very common injuries that can have serious sequelae if pathologic healing ensues. Although there is consensus regarding the importance of a non-united…
(more)
▼ Scaphoid fractures are very common injuries that can have serious sequelae if pathologic healing ensues. Although there is consensus regarding the importance of a non-united scaphoid, the impact of a malunited scaphoid is less clear. This is based on a paucity in the literature and understanding of the natural history of scaphoid malunion. This study aims to elucidate this study but investigating the impact of scaphoid malunion and joint kinetics, as well as the impact of scaphoid malunion on carpal bone kinematics. This was accomplished using a combination of in-silico, as well as in-vivo modelling based of cadaveric results derived from an active motion. Our results showed that increasing scaphoid malunion was associated with increasing joint contact at the radioscaphoid joint. There was no significant relationship between scaphoid motion and scaphoid malunion severity, however, there was a significant change in lunate motion, as well as motion between the scaphoid and lunate.
This work serves as the framework for understanding the complex motion of the carpus and emphasizes the potential importance of establishing a good reduction of the scaphoid following fracture. The clinical importance of this finding has yet to be elucidated, but by understanding this relationship future clinical studies can be target at identifying feature of patients who may benefit from therapy.
Subjects/Keywords: Scaphoid; Malunion; Biomechanics; Computational Modelling; Biomechanical modelling.
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APA (6th Edition):
Chambers, S. B. (2019). The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/6707
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):
Chambers, Spencer B. “The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation.” 2019. Thesis, University of Western Ontario. Accessed February 27, 2020.
https://ir.lib.uwo.ca/etd/6707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chambers, Spencer B. “The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation.” 2019. Web. 27 Feb 2020.
Vancouver:
Chambers SB. The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation. [Internet] [Thesis]. University of Western Ontario; 2019. [cited 2020 Feb 27].
Available from: https://ir.lib.uwo.ca/etd/6707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chambers SB. The Impact of Scaphoid Malunion on Wrist Kinematics & Kinetics: A Biomechanical Investigation. [Thesis]. University of Western Ontario; 2019. Available from: https://ir.lib.uwo.ca/etd/6707
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Loughborough University
17.
Ding, Chenghua.
Role based modelling in support of configurable manufacturing system design.
Degree: PhD, 2010, Loughborough University
URL: https://dspace.lboro.ac.uk/2134/5981
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520383
► Business environments, in which any modern Manufacturing Enterprise (ME) operates, have grown significantly in complexity and are changing faster than ever before. It follows that…
(more)
▼ Business environments, in which any modern Manufacturing Enterprise (ME) operates, have grown significantly in complexity and are changing faster than ever before. It follows that designing a flexible manufacturing system to achieve a set of strategic objectives involves making a series of complex decisions over time. Therefore manufacturing industry needs improved knowledge about likely impacts of making different types of change in MEs and improved modelling approaches that are capable of providing a systematic way of modelling change impacts in complex business processes; prior to risky and costly change implementation projects. An ability to simulate the execution of process instances is also needed to control, animate and monitor simulated flows of multiple products through business processes; and thereby to assess impacts of dynamic distributions and assignments of multiple resource types during any given time period. Further more this kind of modelling capability needs to be integrated into a single modelling framework so as to improve its flexibility and change coordination. Such a modelling capability and framework should help MEs to achieve successfully business process re-engineering, continuous performance development and enterprise re-design. This thesis reports on the development of new modelling constructs and their innovative application when used together with multiple existing modelling approaches. This enables human and technical resource systems to be described, specified and modelled coherently and explicitly. In turn this has been shown to improve the design of flexible, configurable and re-usable manufacturing resource systems, capable of supporting decision making in agile manufacturing systems. A newly conceived and developed Role-Based Modelling Methodology (R-BMM) was proposed during this research study. Also the R-BMM was implemented and tested by using it together with three existing modelling approaches namely (1) extended Enterprise Modelling, (2) dynamic Causal Loop Diagramming and (3) Discrete Event Simulation Modelling (via software PlantSimulation ®). Thereby these three distinct modelling techniques were deployed in a new and coherent way. The new R-BMM approach to modelling manufacturing systems was designed to facilitate: (1) Graphical Representation (2) Explicit Specification and (3) Implementation Description of Resource systems. Essentially the approach enables a match between suitable human and technical resource systems and well defined models of processes and workflows. Enterprise Modelling is used to explicitly define functional and flexibility competencies that need to be possessed by suitable role holders. Causal Loop Diagramming is used to reason about dependencies between different role attributes. The approach was targeted at the design and application of simulation models that enable relative performance comparisons (such as work throughput, lead-time and process costs) to be made and to show how performance is affected by different role decompositions and resourcing…
Subjects/Keywords: 620; Role based modelling; Enterprise modelling; Simulation modelling; Configurable system design; Modelling integration
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APA (6th Edition):
Ding, C. (2010). Role based modelling in support of configurable manufacturing system design. (Doctoral Dissertation). Loughborough University. Retrieved from https://dspace.lboro.ac.uk/2134/5981 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520383
Chicago Manual of Style (16th Edition):
Ding, Chenghua. “Role based modelling in support of configurable manufacturing system design.” 2010. Doctoral Dissertation, Loughborough University. Accessed February 27, 2020.
https://dspace.lboro.ac.uk/2134/5981 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520383.
MLA Handbook (7th Edition):
Ding, Chenghua. “Role based modelling in support of configurable manufacturing system design.” 2010. Web. 27 Feb 2020.
Vancouver:
Ding C. Role based modelling in support of configurable manufacturing system design. [Internet] [Doctoral dissertation]. Loughborough University; 2010. [cited 2020 Feb 27].
Available from: https://dspace.lboro.ac.uk/2134/5981 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520383.
Council of Science Editors:
Ding C. Role based modelling in support of configurable manufacturing system design. [Doctoral Dissertation]. Loughborough University; 2010. Available from: https://dspace.lboro.ac.uk/2134/5981 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520383
University of Edinburgh
18.
O'Hara, Mhairi.
An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland.
Degree: 2012, University of Edinburgh
URL: http://hdl.handle.net/1842/6276
► This paper describes the development of a model that determines the flow path of lava by processing a DEM and estimates the maximum distance it…
(more)
▼ This paper describes the development of a model that determines the flow path of lava by processing a DEM and estimates the maximum distance it will attain based on the average discharge rate. The effusive eruptions that took place at Hekla in 2000 and Eyjfjallajökull in 2010, at the Fimmvörðuháls site in Iceland are used to validate the model. Results show that the model accurately replicates the paths taken by the lava flows during both events, while the calculated flow lengths from the Hekla 2000 eruption are in extremely good agreement with the real flow fields, with an average accuracy of 94.42%. The Lava Flow model is also used to produce hazard maps for both Hekla and Eyjafjallajökull, by identifying zones on the volcanoes flanks that will confine the lava in the event of an eruption source opening within the boundaries.
Advisors/Committee Members: Thordarson, Thor.
Subjects/Keywords: Modelling; Lava Flows
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APA (6th Edition):
O'Hara, M. (2012). An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/6276
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):
O'Hara, Mhairi. “An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland.” 2012. Thesis, University of Edinburgh. Accessed February 27, 2020.
http://hdl.handle.net/1842/6276.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
O'Hara, Mhairi. “An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland.” 2012. Web. 27 Feb 2020.
Vancouver:
O'Hara M. An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland. [Internet] [Thesis]. University of Edinburgh; 2012. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/1842/6276.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
O'Hara M. An Alternative Solution for Modelling Lava Flow Path and Length: applied for hazard assessment at Hekla and Eyjafjallajökull, Iceland. [Thesis]. University of Edinburgh; 2012. Available from: http://hdl.handle.net/1842/6276
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
19.
Evison, Ryan David.
Groundwater age in the Wairarapa.
Degree: 2014, Victoria University of Wellington
URL: http://hdl.handle.net/10063/3674
► This dissertation focuses on the catchment-scale evaluation of groundwater age as a function of space and time in the 270 km² Middle Wairarapa catchment. The…
(more)
▼ This dissertation focuses on the catchment-scale evaluation of groundwater age as a function of space and time in the 270 km² Middle Wairarapa catchment. The simulation of the mean age and point distribution of ages, contributing to a regional age estimate, is a novel demonstration of the recently developed groundwater software, Cornaton (2012). The Wairarapa is in the southern North Island of New Zealand and is a dynamic water catchment exhibiting complex interactions between its rivers and shallow aquifers. Groundwater has been widely utilized since the 1980s for agriculture, horticulture and drinking water; increasing land use development (i.e. irrigation and nutrient application) requires effective regional management of both the quantity and quality of water resources.
Groundwater age provides insights into groundwater flow and transport processes and thus enables better management of groundwater resources. Subsurface water age information enables the interpretation of recharge influence, zones of sensitivity for sustainable abstraction, as well as contamination risk from land-use intensification to drinking water supplies. It is accepted that groundwater is composed of a mixture of water with different ages, however, until very recently mean age has been the primary indicator for groundwater age assessment. Mean age alone can misrepresent the potential for contamination from young water; for example, a groundwater sample with an old mean age may still contain a significant fraction of young water; therefore, a fuller understanding of the age distribution in both time and space is important for groundwater management. The ability to simulate the full distribution of groundwater age within transient numerical groundwater models has only been very recently enabled, through implementation of the time-marching Laplace transform Galerkin technique (TMLTGT), and is demonstrated in this dissertation.
A transient finite-element groundwater flow model originally developed by Greater Wellington Regional Council was converted to simulate transport of the age tracer tritium and groundwater age using the Ground Water (GW) software. Observed tritium concentrations were utilized in the calibration using the Monte Carlo and Gauss-Marquardt-Levenberg methods. Following the calibration of the transport model the GW software was then used to derive pumping well capture zones and directly simulate age throughout the Middle Wairarapa Valley catchment. The advective dispersive equation and the TMLTGT were used for transient mean-age and transient simulations of the full distribution of groundwater age. The results are presented as maps and graphs of both mean age and age distributions throughout the Middle Valley, covering a 15 year simulation period.
The mean-age simulations indicated the groundwater age in the valley was strongly influenced by seasonal changes and extreme climatic events. Significant variations existed, from high rainfall recharge percolating young water throughout the domain, to dry extended droughts limiting…
Advisors/Committee Members: Jackson, Bethanna, Daughney, Chris.
Subjects/Keywords: Transient; Modelling; Tritium
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APA (6th Edition):
Evison, R. D. (2014). Groundwater age in the Wairarapa. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/3674
Chicago Manual of Style (16th Edition):
Evison, Ryan David. “Groundwater age in the Wairarapa.” 2014. Masters Thesis, Victoria University of Wellington. Accessed February 27, 2020.
http://hdl.handle.net/10063/3674.
MLA Handbook (7th Edition):
Evison, Ryan David. “Groundwater age in the Wairarapa.” 2014. Web. 27 Feb 2020.
Vancouver:
Evison RD. Groundwater age in the Wairarapa. [Internet] [Masters thesis]. Victoria University of Wellington; 2014. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10063/3674.
Council of Science Editors:
Evison RD. Groundwater age in the Wairarapa. [Masters Thesis]. Victoria University of Wellington; 2014. Available from: http://hdl.handle.net/10063/3674
Victoria University of Wellington
20.
Dommisse, James Phillip.
Mathematical modelling of solute transport in a heterogeneous aquifer.
Degree: 2015, Victoria University of Wellington
URL: http://hdl.handle.net/10063/4258
► This study provides a contribution to the understanding of parsimony and predictive uncertainty in the context of groundwater solute transport modelling. The study is unique…
(more)
▼ This study provides a contribution to the understanding of parsimony and predictive uncertainty in the context of groundwater solute transport
modelling. The study is unique because the
modelling was undertaken using tracer test data from a heterogeneous artificial aquifer whose structure was known to a very high level of detail. The aquifer structure was based on a ‘real life’ Canterbury Plains alluvial aquifer (in New Zealand).
Parsimonious principles were applied by starting with a simple analytical model that assumed homogeneity then progressively adding heterogeneity using numerical models with varying degrees of parameterisation complexity. The results show that increased complexity did not necessarily make the model better at replicating the tracer test data. For example, the outputs from a numerical model that represented heterogeneity using a zone based approach based on the recorded distribution of all 2,907 blocks that comprised the artificial aquifer was little different to a simple numerical model that adopted a homogenous distribution and included a single value of dispersion. Parameterisation of numerical models using ‘pilot points’ provided the most complex representation of heterogeneity and resulted in the best replication of the tracer test data. However, increasing model complexity had its disadvantages such as decreasing parameterisation uniqueness.
The contribution to predictive uncertainty from model parameters and observations was assessed using a linear approach based on Bayes theorem. This approach has been applied to other groundwater
modelling studies, but not to solute transport
modelling within Canterbury Plains alluvial aquifers or to an artificial aquifer. A unique finding was the reduction in predictive uncertainty along the groundwater flow path. This finding correlated well with the numerical model outputs which showed closer fits to the observation data near the end of the aquifer compared to those near the top of the aquifer where the tracer was injected.
Physical solute transport processes were identified and described as part of the
modelling. These included the increase in dispersivity with travel distance and the spatial distribution of the aquifer hydraulic properties. Analytical
modelling was a useful tool in identifying physical processes, aquifer characteristics and the variation in aquifer hydraulic properties both spatially and with depth.
An important finding was the value of undertaking multiple
modelling approaches. This is because each approach has its own advantages and disadvantageous and by comparing the results of different approaches, the true facts about the aquifer system are made clearer.
Advisors/Committee Members: Jackson, Bethanna.
Subjects/Keywords: Groundwater; Modelling; Tracer
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APA (6th Edition):
Dommisse, J. P. (2015). Mathematical modelling of solute transport in a heterogeneous aquifer. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/4258
Chicago Manual of Style (16th Edition):
Dommisse, James Phillip. “Mathematical modelling of solute transport in a heterogeneous aquifer.” 2015. Masters Thesis, Victoria University of Wellington. Accessed February 27, 2020.
http://hdl.handle.net/10063/4258.
MLA Handbook (7th Edition):
Dommisse, James Phillip. “Mathematical modelling of solute transport in a heterogeneous aquifer.” 2015. Web. 27 Feb 2020.
Vancouver:
Dommisse JP. Mathematical modelling of solute transport in a heterogeneous aquifer. [Internet] [Masters thesis]. Victoria University of Wellington; 2015. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10063/4258.
Council of Science Editors:
Dommisse JP. Mathematical modelling of solute transport in a heterogeneous aquifer. [Masters Thesis]. Victoria University of Wellington; 2015. Available from: http://hdl.handle.net/10063/4258
University of Pretoria
21.
Muller, Jacques.
Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling.
Degree: Materials Science and
Metallurgical Engineering, 2015, University of Pretoria
URL: http://hdl.handle.net/2263/44429
► The tapping of slag and metal is a key operational aspect in high-carbon ferromanganese (HCFeMn) and silicomanganese (SiMn) production. Tapping behaviour can be influenced by…
(more)
▼ The tapping of slag and metal is a key operational
aspect in high-carbon ferromanganese (HCFeMn) and silicomanganese
(SiMn) production. Tapping behaviour can be influenced by taphole
design and the physicochemical properties of the tapped slag and
metal. Unfavourable behaviour includes difficulties during taphole
opening, and sluggish or intermittent slag flow. The slags of
interest here consist mostly of components in the
CaO-MnO-SiO2-Al2O3-MgO system, but differ greatly in MnO content
and basicity due to the different operating practices.
To
evaluate the flow behaviour of these slags from submerged arc
furnaces (SAFs) the latest physicochemical property models were
applied to model viscosity, thermal conductivity, density, and heat
capacity as functions of temperature and typical HCFeMn and SiMn
slag compositions. These property values were applied in a
simplified model of flow through the coke bed and taphole with an
inlet pressure specified. Based on a model from the literature
(Iida et al. 2008), a model was formulated with spherical-radial
flow through the coke bed, being independent of the length of the
fluid path through the coke bed.
The effect of variation in the
slag-metal ratio was investigated, with the focus on tap streams
consisting of only slag. The estimated flow rates were comparable
to those reported elsewhere (Kadkhodabeigi 2011) and found to be
dependent mostly on slag viscosity, which was generally lower for
the typical SiMn slags due to their composition and higher
operating temperature. Furthermore, in most of the cases considered
it was estimated that the flow through the taphole would develop
into laminar flow, with the pressure drop predominantly over the
coke bed. Flow rates were found to be highly dependent on the
taphole diameter and coke bed void fraction, and to lesser extent
on the taphole length and coke bed particle diameter.
Advisors/Committee Members: Pistorius, Chris (advisor), Zietsman, Johan (coadvisor).
Subjects/Keywords: Metallurgy;
Modelling; UCTD
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APA (6th Edition):
Muller, J. (2015). Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/44429
Chicago Manual of Style (16th Edition):
Muller, Jacques. “Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling.” 2015. Masters Thesis, University of Pretoria. Accessed February 27, 2020.
http://hdl.handle.net/2263/44429.
MLA Handbook (7th Edition):
Muller, Jacques. “Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling.” 2015. Web. 27 Feb 2020.
Vancouver:
Muller J. Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling. [Internet] [Masters thesis]. University of Pretoria; 2015. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/2263/44429.
Council of Science Editors:
Muller J. Evaluation of
HCFeMn and SiMn Slag Tapping Flow Behaviour Using Physicochemical
Property Modelling and Analytical Flow Modelling. [Masters Thesis]. University of Pretoria; 2015. Available from: http://hdl.handle.net/2263/44429
California State University – Sacramento
22.
Cherupalli, Pranav Kumar.
Behavioral modeling of a regenerative comparator using Verilog-AMS.
Degree: MS, Electrical and Electronic Engineering, 2011, California State University – Sacramento
URL: http://hdl.handle.net/10211.9/1094
► Comparators are widely used in mixed-signal systems. They are an essential building block of any analog-to-digital converter architecture. Regenerative comparators are typically used in high-speed…
(more)
▼ Comparators are widely used in mixed-signal systems. They are an essential building block of any analog-to-digital converter architecture. Regenerative comparators are typically used in high-speed analog-to-digital convertor designs. This particular architecture has two main characteristics that make it differentiable from the other architectures. First is the positive feedback during the regenerative phase to achieve high gain and the second is the cancellation of the memory of previous comparison results during the reset phase.
A behavioral model of any circuitry block is always helpful, before creating the actual design, to understand the tradeoffs during system design. Verilog-AMS provides an extended capability to model any analog or digital block, so as to seamlessly integrate the behavioral block into the actual design consisting of a combination of analog and digital blocks. A mapping between the analog and digital domains enhances the (re)usability of designs for mixed-signal blocks. Since Verilog-AMS actively supports the mixed-signal approach, the interchange of digital and analog blocks is straightforward. This work will result in a behavioral model for a regenerative comparator written in Verilog-AMS.
The project presents the behavioral model of a regenerative comparator written in Verilog-AMS. The model is simulated using the time-windowing function to find the sensitivity of the comparator to pre- and post-clock inputs. The key specifications described in [3] by Thomas Matthews will be used to compare Verilog-AMS behavioral model circuit simulation results with analytical results.
Advisors/Committee Members: Matthews, Thomas W..
Subjects/Keywords: Analog design modelling
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APA (6th Edition):
Cherupalli, P. K. (2011). Behavioral modeling of a regenerative comparator using Verilog-AMS. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.9/1094
Chicago Manual of Style (16th Edition):
Cherupalli, Pranav Kumar. “Behavioral modeling of a regenerative comparator using Verilog-AMS.” 2011. Masters Thesis, California State University – Sacramento. Accessed February 27, 2020.
http://hdl.handle.net/10211.9/1094.
MLA Handbook (7th Edition):
Cherupalli, Pranav Kumar. “Behavioral modeling of a regenerative comparator using Verilog-AMS.” 2011. Web. 27 Feb 2020.
Vancouver:
Cherupalli PK. Behavioral modeling of a regenerative comparator using Verilog-AMS. [Internet] [Masters thesis]. California State University – Sacramento; 2011. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10211.9/1094.
Council of Science Editors:
Cherupalli PK. Behavioral modeling of a regenerative comparator using Verilog-AMS. [Masters Thesis]. California State University – Sacramento; 2011. Available from: http://hdl.handle.net/10211.9/1094
University of Manchester
23.
Choi, Cecilia.
A biophysically detailed mathematical model of a single late pregnant rat myometrial cell.
Degree: PhD, 2011, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/a-biophysically-detailed-mathematical-model-of-a-single-late-pregnant-rat-myometrial-cell(6d2e1178-370a-4de1-b1fb-9660d1ecf799).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528268
► While premature birth is still one of the major clinical problems worldwide, the exact physiological mechanisms underlying myometrium activity during pregnancy remain unclear. In this…
(more)
▼ While premature birth is still one of the major clinical problems worldwide, the exact physiological mechanisms underlying myometrium activity during pregnancy remain unclear. In this thesis, a novel biophysically detailed model was constructed using available experimental data to simulate chemical, electrical and mechanical activity in a late pregnant rat uterine myocycte. The developed model has been used to elucidate the ionic mechanism underlying myometrium functionality, providing better insights in the function of the uterus during pregnancy. The model consisted of 15 membrane currents, intracellular calcium handling process coupled with a sliding actin-myosin filament mechanical model to describe uterine behaviour and contractile activity at the single myocyte level. Each of the ionic currents were modelled using Hodgkin-Huxley-type equations. The simulated current traces and current-voltage curves were validated with experimental recordings and the model was further validated by the ability to produce a bursting action potential (AP) during an external stimulus. The model replicated the effects of estradiol during pregnancy, modulating the amplitude and activation properties of individual Ca2+ and K+ currents, therefore altering the AP configuration to a tonic-like plateau. The model also reproduced the actions of drugs to inhibit certain channels to investigate their roles in myometrium. Sensitivity analysis was performed to examine the model's behaviour to changing parameters. A simple 1-D study was conducted to investigate how electrical signals propagate along strand of cells. Although the model successfully replicated results similar to recordings seen in the experiments, limitations have to be addressed and more studies have to be carried out to further improve the model.
Subjects/Keywords: 571.6; Uterus; Modelling
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APA (6th Edition):
Choi, C. (2011). A biophysically detailed mathematical model of a single late pregnant rat myometrial cell. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/a-biophysically-detailed-mathematical-model-of-a-single-late-pregnant-rat-myometrial-cell(6d2e1178-370a-4de1-b1fb-9660d1ecf799).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528268
Chicago Manual of Style (16th Edition):
Choi, Cecilia. “A biophysically detailed mathematical model of a single late pregnant rat myometrial cell.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 27, 2020.
https://www.research.manchester.ac.uk/portal/en/theses/a-biophysically-detailed-mathematical-model-of-a-single-late-pregnant-rat-myometrial-cell(6d2e1178-370a-4de1-b1fb-9660d1ecf799).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528268.
MLA Handbook (7th Edition):
Choi, Cecilia. “A biophysically detailed mathematical model of a single late pregnant rat myometrial cell.” 2011. Web. 27 Feb 2020.
Vancouver:
Choi C. A biophysically detailed mathematical model of a single late pregnant rat myometrial cell. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2020 Feb 27].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/a-biophysically-detailed-mathematical-model-of-a-single-late-pregnant-rat-myometrial-cell(6d2e1178-370a-4de1-b1fb-9660d1ecf799).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528268.
Council of Science Editors:
Choi C. A biophysically detailed mathematical model of a single late pregnant rat myometrial cell. [Doctoral Dissertation]. University of Manchester; 2011. Available from: https://www.research.manchester.ac.uk/portal/en/theses/a-biophysically-detailed-mathematical-model-of-a-single-late-pregnant-rat-myometrial-cell(6d2e1178-370a-4de1-b1fb-9660d1ecf799).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528268
University of Saskatchewan
24.
MIRSHEKARI, ELHAM.
Extending BACOLI to solve multi-scale problems.
Degree: 2014, University of Saskatchewan
URL: http://hdl.handle.net/10388/ETD-2014-09-1713
► The BACOLI package is a numerical software package for solving parabolic partial differential equations in one spatial dimension. It implements a B-spline collocation method for…
(more)
▼ The BACOLI package is a numerical software package for solving parabolic partial differential
equations in one spatial dimension. It implements a B-spline collocation method for the spatial
discretization of a system of partial differential equations. The resultant ordinary differential equations
together with the boundary conditions form a system of differential-algebraic equations. The
differential-algebraic equations are then solved using the DASSL solver. The BACOLI software package
features adaptive error control in the temporal and spatial domains. The estimate of the temporal
error is controlled through the DASSL solver. The estimate of the spatial error is controlled based
on the difference between two solutions computed in the BACOLI software package. This difference
gives an estimation of the error. If this error estimate does not meet the user-supplied tolerance,
then the spatial mesh is changed.
The BACOLI software package can only solve parabolic partial differential equations that depend
on spatial derivatives. In this thesis, the BACOLI software package is modified to solve a broader
spectrum of problems. In fact, after some modifications, the extended BACOLI software package can
solve systems of parabolic partial differential equations and time-dependent equations that do not
depend on spatial derivatives. We apply this extended software package to solve the monodomain
model of cardiac electrophysiology.
The monodomain model is a multi-scale mathematical model for the evolution of the electrical
potential in cardiac tissue that couples the ionic currents at the cellular scale with their propagation
at the tissue scale. Because of their local nature, the mathematical models of a single cell have no
dependency on spatial derivatives whereas the models at the tissue level do.
The heart models considered in our numerical experiments use various cardiac cell models. We
find that solving the heart models through the extended BACOLI software package, in some cases,
leads to a speed-up in comparison with the Chaste software package, which is a powerful, widely
used, and well-respected software package for heart simulation.
Advisors/Committee Members: Spiteri, Raymond J., Bickis, Mik, Sowa, Artur, Patrick, George, Fairweather, Graeme.
Subjects/Keywords: BACOLI; mathematical modelling
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APA (6th Edition):
MIRSHEKARI, E. (2014). Extending BACOLI to solve multi-scale problems. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2014-09-1713
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):
MIRSHEKARI, ELHAM. “Extending BACOLI to solve multi-scale problems.” 2014. Thesis, University of Saskatchewan. Accessed February 27, 2020.
http://hdl.handle.net/10388/ETD-2014-09-1713.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
MIRSHEKARI, ELHAM. “Extending BACOLI to solve multi-scale problems.” 2014. Web. 27 Feb 2020.
Vancouver:
MIRSHEKARI E. Extending BACOLI to solve multi-scale problems. [Internet] [Thesis]. University of Saskatchewan; 2014. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10388/ETD-2014-09-1713.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
MIRSHEKARI E. Extending BACOLI to solve multi-scale problems. [Thesis]. University of Saskatchewan; 2014. Available from: http://hdl.handle.net/10388/ETD-2014-09-1713
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
McMaster University
25.
McCloskey, Jessica.
Modelling Young Star Clusters with AMUSE.
Degree: MSc, 2015, McMaster University
URL: http://hdl.handle.net/11375/18498
► An important research area in modern astrophysics is understanding how molecular clouds form stars and star clusters. These rich clusters within molecular clouds are the…
(more)
▼ An important research area in modern astrophysics is understanding how molecular clouds form stars and star clusters. These rich clusters within molecular clouds are the dominant mode of star formation in our galaxy, but we know very little about these areas of space due to incomplete observational data. The MYStIX (Massive Young Star-Forming Complex Study in Infrared and X-Ray) project was started to create a detailed catalogue of these regions and the rich star clusters embedded within them. Once the observational data was available, the evolution of these clusters could be investigated in more detail. Current cluster simulations investigate the stars in detail but usually ignore the gas entirely which can be inaccurate, especially in gas mass dominated clusters. We use AMUSE (Astrophysical Multi-purpose Software Environment) to model embedded young clusters with stars and gas, similar to those found by the MYStIX project, and track their evolution over the first few million years of their lifespan while allowing the stars and gas to interact. We are particularly interested in non-spheroidal subclusters and how they can evolve into the spherical
structures that we see today.
Thesis
Master of Science (MSc)
Advisors/Committee Members: Sills, Alison, Physics and Astronomy.
Subjects/Keywords: star cluster; modelling
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APA (6th Edition):
McCloskey, J. (2015). Modelling Young Star Clusters with AMUSE. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/18498
Chicago Manual of Style (16th Edition):
McCloskey, Jessica. “Modelling Young Star Clusters with AMUSE.” 2015. Masters Thesis, McMaster University. Accessed February 27, 2020.
http://hdl.handle.net/11375/18498.
MLA Handbook (7th Edition):
McCloskey, Jessica. “Modelling Young Star Clusters with AMUSE.” 2015. Web. 27 Feb 2020.
Vancouver:
McCloskey J. Modelling Young Star Clusters with AMUSE. [Internet] [Masters thesis]. McMaster University; 2015. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11375/18498.
Council of Science Editors:
McCloskey J. Modelling Young Star Clusters with AMUSE. [Masters Thesis]. McMaster University; 2015. Available from: http://hdl.handle.net/11375/18498
Massey University
26.
Wang, Ting.
Statistical models for earthquakes incorporating ancillary data.
Degree: PhD, Statistics, 2010, Massey University
URL: http://hdl.handle.net/10179/1486
► This thesis consists of two parts. The first part proposes a new model – the Markov-modulated Hawkes process with stepwise decay (MMHPSD) to investigate the…
(more)
▼ This thesis consists of two parts. The first part proposes a new model – the Markov-modulated
Hawkes process with stepwise decay (MMHPSD) to investigate the seismicity rate. The MMHPSD
is a self-exciting process which switches among different states, in each of which the process has
distinguishable background seismicity and decay rates. Parameter estimation is developed via the
expectation maximization algorithm. The model is applied to data from the Landers earthquake
sequence, demonstrating that it is useful for modelling changes in the temporal patterns of seismicity.
The states in the model can capture the behavior of main shocks, large aftershocks, secondary
aftershocks and a period of quiescence with different background rates and decay rates. The state
transitions can then explain the seismicity rate changes and help indicate if there is any seismicity
shadow or relative quiescence.
The second part of this thesis develops statistical methods to examine earthquake sequences
possessing ancillary data, in this case groundwater level data or GPS measurements of deformation.
For the former, signals from groundwater level data at Tangshan Well, China, are extracted for the
period from 2002 to 2005 using a moving window method. A number of different statistical techniques
are used to detect and quantify coseismic responses to P, S, Love and Rayleigh wave arrivals.
The P phase arrivals appear to trigger identifiable oscillations in groundwater level, whereas the
Rayleigh waves amplify the water level movement. Identifiable coseismic responses are found for
approximately 40 percent of magnitude 6+ earthquakes worldwide. A threshold in the relationship
between earthquake magnitude and well–epicenter distance is also found, satisfied by 97% of the
identified coseismic responses, above which coseismic changes in groundwater level at Tangshan
Well are most likely.
A non-linear filter measuring short-term deformation rate changes is introduced to extract signals
from GPS data. For two case studies of a) deep earthquakes in central North Island, New
Zealand, and b) shallow earthquakes in Southern California, a hidden Markov model (HMM) is
fitted to the output from the filter. Mutual information analysis indicates that the state having the
largest variation of deformation rate contains precursory information that indicates an elevated probability
for earthquake occurrence.
Subjects/Keywords: Statistical modelling;
Earthquakes
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APA (6th Edition):
Wang, T. (2010). Statistical models for earthquakes incorporating ancillary data. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/1486
Chicago Manual of Style (16th Edition):
Wang, Ting. “Statistical models for earthquakes incorporating ancillary data.” 2010. Doctoral Dissertation, Massey University. Accessed February 27, 2020.
http://hdl.handle.net/10179/1486.
MLA Handbook (7th Edition):
Wang, Ting. “Statistical models for earthquakes incorporating ancillary data.” 2010. Web. 27 Feb 2020.
Vancouver:
Wang T. Statistical models for earthquakes incorporating ancillary data. [Internet] [Doctoral dissertation]. Massey University; 2010. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10179/1486.
Council of Science Editors:
Wang T. Statistical models for earthquakes incorporating ancillary data. [Doctoral Dissertation]. Massey University; 2010. Available from: http://hdl.handle.net/10179/1486
University of Cape Town
27.
Nickless, Alecia.
Regional CO₂ flux estimates for South Africa through inverse modelling.
Degree: PhD, Statistical Sciences, 2018, University of Cape Town
URL: http://hdl.handle.net/11427/29703
► Bayesian inverse modelling provides a top-down technique of verifying emissions and uptake of carbon dioxide (CO₂) from both natural and anthropogenic sources. It relies on…
(more)
▼ Bayesian inverse
modelling provides a top-down technique of verifying emissions and uptake of carbon dioxide (CO₂) from both natural and anthropogenic sources. It relies on accurate measurements of CO₂ concentrations at appropriately placed sites and "best-guess" initial estimates of the biogenic and anthropogenic emissions, together with uncertainty estimates. The Bayesian framework improves current estimates of CO₂ fluxes based on independent measurements of CO₂ concentrations while being constrained by the initial estimates of these fluxes. Monitoring, reporting and verification (MRV) is critical for establishing whether emission reducing activities to mitigate the effects of climate change are being effective, and the Bayesian inverse
modelling approach of correcting CO₂ flux estimates provides one of the tools regulators and researchers can use to refine these emission estimates. South Africa is known to be the largest emitter of CO₂ on the African continent. The first major objective of this research project was to carry out such an optimal network design for South Africa. This study used fossil fuel emission estimates from a satellite product based on observations of night-time lights and locations of power stations (Fossil Fuel Data Assimilations System (FFDAS)), and biogenic productivity estimates from a carbon assessment carried out for South Africa to provide the initial CO₂ flux estimates and their uncertainties. Sensitivity analyses considered changes to the covariance matrix and spatial scale of the inversion, as well as different optimisation algorithms, to assess the impact of these specifications on the optimal network solution. This question was addressed in Chapters 2 and 3. The second major objective of this project was to use the Bayesian inverse
modelling approach to obtain estimates of CO₂ fluxes over Cape Town and surrounding area. I collected measurements of atmospheric CO₂ concentrations from March 2012 until July 2013 at Robben Island and Hangklip lighthouses. CABLE (Community Atmosphere Biosphere Land Exchange), a land-atmosphere exchange model, provided the biogenic estimates of CO₂ fluxes and their uncertainties. Fossil fuel estimates and uncertainties were obtained by means of an inventory analysis for Cape Town. As an inventory analysis was not available for Cape Town, this exercise formed an additional objective of the project, presented in Chapter 4. A spatially and temporally explicit, high resolution surface of fossil fuel emission estimates was derived from road vehicle, aviation and shipping vessel count data, population census data, and industrial fuel use statistics, making use of well-established emission factors. The city-scale inversion for Cape Town solved for weekly fluxes of CO₂ emissions on a 1 km × 1 km grid, keeping fossil fuel and biogenic emissions as separate sources. I present these results for the Cape Town inversion under the proposed best available configuration of the Bayesian inversion framework in Chapter 5. Due to the large number of CO₂ sources at this…
Advisors/Committee Members: Rayner, Peter (advisor), Scholes, Bob (advisor), Erni, Birgit (advisor), Underhill, Leslie G (advisor).
Subjects/Keywords: Bayesian inverse modelling
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APA (6th Edition):
Nickless, A. (2018). Regional CO₂ flux estimates for South Africa through inverse modelling. (Doctoral Dissertation). University of Cape Town. Retrieved from http://hdl.handle.net/11427/29703
Chicago Manual of Style (16th Edition):
Nickless, Alecia. “Regional CO₂ flux estimates for South Africa through inverse modelling.” 2018. Doctoral Dissertation, University of Cape Town. Accessed February 27, 2020.
http://hdl.handle.net/11427/29703.
MLA Handbook (7th Edition):
Nickless, Alecia. “Regional CO₂ flux estimates for South Africa through inverse modelling.” 2018. Web. 27 Feb 2020.
Vancouver:
Nickless A. Regional CO₂ flux estimates for South Africa through inverse modelling. [Internet] [Doctoral dissertation]. University of Cape Town; 2018. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11427/29703.
Council of Science Editors:
Nickless A. Regional CO₂ flux estimates for South Africa through inverse modelling. [Doctoral Dissertation]. University of Cape Town; 2018. Available from: http://hdl.handle.net/11427/29703
University of Oxford
28.
Madkhali, Abdossalam Mohammed A.
Modelling secondary cancer risk from photon and proton therapy in medulloblastoma.
Degree: PhD, 2018, University of Oxford
URL: http://ora.ox.ac.uk/objects/uuid:bba09d04-8179-4d04-9d3f-cbd2ca66ea7b
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770429
► More than half of cancer patients receive radiotherapy for radical or palliative purposes. Increasing survival rates in cancer patients makes it important to study long-term…
(more)
▼ More than half of cancer patients receive radiotherapy for radical or palliative purposes. Increasing survival rates in cancer patients makes it important to study long-term side effects, especially secondary cancers. Medulloblastoma (MB), a posterior fossa tumour, predominantly a childhood disease, is an example of a clinical scenario where proton therapy could have significant advantages. It is therefore used as an exemplar in this thesis to investigate the relationship between malignant induction probability (MIP) and secondary cancer risk in 3D conformal photon therapy (3DCRT) and actively scanned proton therapy by using MATLAB-based code, models, relevant parameters and input values from voxel-by-voxel dose maps. In this thesis, work started by modelling MIP for different treatment plans to assess the relative MIP values. MIP for different modalities was investigated whilst explicitly incorporating the uncertainty in the model parameters in the modelling process. Results showed that proton therapy is less likely to induce malignancy when compared to 3DCRT (p-value < 0.05). To be able to compare our results with published absolute secondary cancer risk estimates and across patients, model parameters were calibrated and benchmarked, and absolute risk values were calculated. This thesis also addresses, in part, some of the other uncertainties that affect secondary cancer modelling. The effect of spatial dose averaging on predicting MIP was studied by modelling risk using mean, and voxel-by-voxel dose. The effect of changes in radiobiological effectiveness (RBE) on modelling MIP was also studied. This work showed that independent of the model chosen, and independent of the uncertainty in parameters, proton therapy is less likely to induce malignancy and cause secondary cancer than 3DCRT in patients with medulloblastoma. It was also shown that models used could be benchmarked and calibrated against published models, enabling the calculation of clinically realistic absolute secondary cancer risk estimates. The use of mean dose was shown to introduce a systematic error in regions of high dose inhomogeneity in comparison to the voxel-by-voxel method, making use of the high resolution voxel-by-voxel MIP calculation a necessary step in decreasing uncertainty in modelling outcomes. The work also demonstrated that using an RBE of 1.1 could lead to errors in the range of 5%, leading to potentially higher NTCP or lower local control, which is in agreement with what published literature suggests.
Subjects/Keywords: Oncology; Radiobiology; Modelling
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Export
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APA (6th Edition):
Madkhali, A. M. A. (2018). Modelling secondary cancer risk from photon and proton therapy in medulloblastoma. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:bba09d04-8179-4d04-9d3f-cbd2ca66ea7b ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770429
Chicago Manual of Style (16th Edition):
Madkhali, Abdossalam Mohammed A. “Modelling secondary cancer risk from photon and proton therapy in medulloblastoma.” 2018. Doctoral Dissertation, University of Oxford. Accessed February 27, 2020.
http://ora.ox.ac.uk/objects/uuid:bba09d04-8179-4d04-9d3f-cbd2ca66ea7b ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770429.
MLA Handbook (7th Edition):
Madkhali, Abdossalam Mohammed A. “Modelling secondary cancer risk from photon and proton therapy in medulloblastoma.” 2018. Web. 27 Feb 2020.
Vancouver:
Madkhali AMA. Modelling secondary cancer risk from photon and proton therapy in medulloblastoma. [Internet] [Doctoral dissertation]. University of Oxford; 2018. [cited 2020 Feb 27].
Available from: http://ora.ox.ac.uk/objects/uuid:bba09d04-8179-4d04-9d3f-cbd2ca66ea7b ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770429.
Council of Science Editors:
Madkhali AMA. Modelling secondary cancer risk from photon and proton therapy in medulloblastoma. [Doctoral Dissertation]. University of Oxford; 2018. Available from: http://ora.ox.ac.uk/objects/uuid:bba09d04-8179-4d04-9d3f-cbd2ca66ea7b ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770429
ETH Zürich
29.
Miglani, Somil Ajit.
Concept Study for a Techno Centric Energy System Modeling Framework.
Degree: 2014, ETH Zürich
URL: http://hdl.handle.net/20.500.11850/187430
► Modern energy systems face several challenges because of increased attempts by govern- ments and general public to push towards a sustainable future. Policy makers have…
(more)
▼ Modern energy systems face several challenges because of increased attempts by govern-
ments and general public to push towards a sustainable future. Policy makers have been
trying hard to construct policy frameworks that push the evolution of the energy system
towards low carbon technologies. These policies are designed taking insights from com-
puter models of the energy systems and their operation. Hence, modeling and analysis
is important for understanding the impacts of certain policies on the energy system and
comparing those impacts with the desired evolutionary path that the system must take in
order to fulfill governmental targets in the context of sustainability. Since energy systems
are complex with several inter connected sub systems and components, many models are
required to simulate them in entirety. The multiplicity of models further increases when
several distinct problems in the energy domain are desired to be modeled. This study
investigates on creating a generic energy system modeling framework that will lay down
a foundation and basis for several modeling problems in energy systems research. It also
provides a common language for communication between modelers, therefore, easing the
modeling process. This framework is realized by studying example problems which re-
semble the problems that will be modeled in the future using this framework. Research
questions are formulated and a literature survey is performed to create a knowledge base
representing the modeling techniques used to models these problems and energy systems
in general. Abstractions are drawn from all these exemplary studies and converted to con-
crete concepts which can be represented as a piece of software. The conceptual framework
uses an ontological approach to convert these abstractions into concretized software ele-
ments. An agent based modeling approach is proposed as the primary modeling paradigm
for the framework. The suitability of the ontological approach and agent based modeling
is demonstrated and tested through the application of the framework for a case study.
The case study is demonstrative, hence it is hypothetically formulated with assumed data
values. In the case study, a hydrogen supply chain in a hypothetical energy system is mod-
eled. The case study demonstrates energy system evolution, emergent effects of energy
systems, features, strengths and weaknesses of the framework and agent based modeling
as well. The conceptual framework developed in this thesis provides a preliminary step
towards the standardization of the modeling process.
Advisors/Committee Members: Boulouchos, Konstantinos, Georges, Gil.
Subjects/Keywords: Energy systems modelling
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Miglani, S. A. (2014). Concept Study for a Techno Centric Energy System Modeling Framework. (Thesis). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/187430
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):
Miglani, Somil Ajit. “Concept Study for a Techno Centric Energy System Modeling Framework.” 2014. Thesis, ETH Zürich. Accessed February 27, 2020.
http://hdl.handle.net/20.500.11850/187430.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Miglani, Somil Ajit. “Concept Study for a Techno Centric Energy System Modeling Framework.” 2014. Web. 27 Feb 2020.
Vancouver:
Miglani SA. Concept Study for a Techno Centric Energy System Modeling Framework. [Internet] [Thesis]. ETH Zürich; 2014. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/20.500.11850/187430.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Miglani SA. Concept Study for a Techno Centric Energy System Modeling Framework. [Thesis]. ETH Zürich; 2014. Available from: http://hdl.handle.net/20.500.11850/187430
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
30.
Gandhi, Siddharth Nandkumar.
New Avenues in Atmospheric Modelling of Exoplanets.
Degree: PhD, 2020, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/298755
► In this thesis I explore various aspects of atmospheric characterisation of exoplanets with the primary goal of understanding their chemical compositions and physical processes. My…
(more)
▼ In this thesis I explore various aspects of atmospheric characterisation of exoplanets with the primary goal of understanding their chemical compositions and physical processes. My research led to the development of new self-consistent models of exoplanetary atmospheres, a new paradigm for atmospheric retrievals of thermal emission spectra, as well as chemical detections using both high-resolution Doppler spectroscopy as well as low-resolution transit spectroscopy.
I firstly computed the molecular and atomic cross sections of various species prevalent in the atmospheres of such exoplanets in order to compute their spectra. The absorption cross sections were calculated through the broadening of spectral lines obtained from high resolution line lists. These cross sections and subsequent spectral models have led to the detections of numerous chemical species (HCN, TiO, Li, Na, K, CO, and H2O) in the atmospheres of several exoplanets.
Recent advances in observations have heralded the need for accurate models of exoplanetary atmospheres. I have built a new self-consistent atmospheric model, GENESIS, custom built for exoplanets and demonstrated for irradiated and non-irradiated atmospheres over a wide range of atmospheric parameter space. The model treats line-by-line radiative transfer through the Feautrier method and radiative-convective equilibrium through the Rybicki Complete Linearisation method in a plane parallel atmosphere. This model allows for a detailed exploration of radiative processes and chemical compositions and their effects on observed emission spectra. I compared this model against several others in the literature and found good agreement between the atmospheric properties and emission spectra.
Thermal inversions have been seen on the dayside atmospheres of some hot Jupiters and have been predicted to be caused by TiO or VO due to their visible opacity. I used the GENESIS model to investigate the effect of visible opacity and deduced that many new species (AlO, CaO, NaH and MgH), hitherto unexplored, are also capable of causing thermal inversions on hot Jupiters. I have explored the effect of these species as a function of their overall atmospheric abundance as well as determining the required abundance for each of these species to form an inversion. Secondly, I show that a low infrared opacity caused by a low H2O abundance can also lead to strong thermal inversions even with sub-solar abundances of these visible absorbers due to the change in infrared opacity. As a demonstration of this work I have shown that the thermal inversion on WASP-121b can be explained by all the visible absorbers listed above. These thermal inversions are of great importance as the species responsible may be observed with current observational capabilities, thus providing testable observations for these species.
I have also developed a new hybrid retrieval method for exoplanetary emission spectra, HyDRA. This uses the latest atmospheric modelling tools to fit the observed spectra of exoplanet atmospheres. We explore…
Subjects/Keywords: Exoplanets; Atmospheres; Modelling
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gandhi, S. N. (2020). New Avenues in Atmospheric Modelling of Exoplanets. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/298755
Chicago Manual of Style (16th Edition):
Gandhi, Siddharth Nandkumar. “New Avenues in Atmospheric Modelling of Exoplanets.” 2020. Doctoral Dissertation, University of Cambridge. Accessed February 27, 2020.
https://www.repository.cam.ac.uk/handle/1810/298755.
MLA Handbook (7th Edition):
Gandhi, Siddharth Nandkumar. “New Avenues in Atmospheric Modelling of Exoplanets.” 2020. Web. 27 Feb 2020.
Vancouver:
Gandhi SN. New Avenues in Atmospheric Modelling of Exoplanets. [Internet] [Doctoral dissertation]. University of Cambridge; 2020. [cited 2020 Feb 27].
Available from: https://www.repository.cam.ac.uk/handle/1810/298755.
Council of Science Editors:
Gandhi SN. New Avenues in Atmospheric Modelling of Exoplanets. [Doctoral Dissertation]. University of Cambridge; 2020. Available from: https://www.repository.cam.ac.uk/handle/1810/298755
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Open Access Theses and Dissertations