subject:(Detection coverage)

Georgia Tech

1. Chen, Xin. 5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection.

Degree: PhD, Computer Science, 2020, Georgia Tech

► 5-axis machining is a strategy that allows computer numerical control (CNC) move an object or cutting tool along five different axes (X, Y, Z and… (more)

▼ 5-axis machining is a strategy that allows computer numerical control (CNC) move an object or cutting tool along five different axes (X, Y, Z and two additional rotary axes) simultaneously. This provides infinite possibilities of machining very complex objects, which is why 5-axis machining gets more and more popular. This thesis focuses on a path planning problem that arises in 5-axis machining applications: how to construct a tool path that covers the surface of a 3D object, produces a short milling time, and is collision-free. This thesis proposes a general path planning framework with a fast collision detection algorithm to generate an efficient 5-axis path. We first present a unifying, general and adaptive framework with deep reinforcement learning, called adaptive deep path (AD Path), to generate an efficient path for covering an arbitrary 2D environment. The key idea of this algorithm is a new graph model based on boustrophedon cellular decomposition (BCD), which is a method of transforming a space into cell regions with morse decomposition. This graph model can easily reflect the physical distance in the graph, and evaluate the cost of an arbitrary path. We show that when applied to deep reinforcement learning, AD Path can efficiently reduce the path length and the number of corners adaptively. Second, this thesis presents a fast parallel collision detection algorithm, named aggressive inaccessible cone angle (AICA) for CNC milling applications. The key idea of our proposed method is the concept of inaccessible cone angle (ICA), which is a new geometric abstraction for collision detection tests, and its effective use, including memoization to remove redundant work and increasing parallelization. We have prototyped our AICA algorithm within a real CNC milling tool, SculptPrint. Experimental results on 4 CAD benchmarks demonstrate that AICA is up to 23 times faster than the approach of the traditional checking. Third, this thesis proposes a new 5-axis coverage path planning algorithm, called max orientation coverage, considering both the trajectory of the cutting tool end in 3-axis, and the orientations of the tool as the other 2 rotatory axes. This algorithm aims at reducing the machining time, by designing an efficient 5-axis path to reduce the number of tool reorientations and the number of tool retractions (pulling the tool back and in) as a constraint of being collision-free. Our proposed method employs a two-step optimization. We validate our method using four CAD benchmark objects against a previously proposed random sampling-based coverage algorithm. On average, our method improves the path efficiency by 29.7%. Advisors/Committee Members: Vuduc, Richard (advisor), Kurfess, Thomas (committee member), Catalyurek, Umit (committee member), Young, Jeff (committee member), Tucker, Thomas (committee member).

Subjects/Keywords: Coverage path planning; Collision detection; Deep reinforcement learning

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, X. (2020). 5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/62825

Chicago Manual of Style (16^th Edition):

Chen, Xin. “5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection.” 2020. Doctoral Dissertation, Georgia Tech. Accessed March 03, 2021. http://hdl.handle.net/1853/62825.

MLA Handbook (7^th Edition):

Chen, Xin. “5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection.” 2020. Web. 03 Mar 2021.

Vancouver:

Chen X. 5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection. [Internet] [Doctoral dissertation]. Georgia Tech; 2020. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1853/62825.

Council of Science Editors:

Chen X. 5-axis coverage path planning with deep reinforcement learning and fast parallel collision detection. [Doctoral Dissertation]. Georgia Tech; 2020. Available from: http://hdl.handle.net/1853/62825

University of Manchester

2. Wright, Thomas Frederick. Characterisation of Remote Nuclear Environments.

Degree: 2018, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:316826

► Many legacy nuclear facilities exist with the number of such facilities due to increase in the future. For a variety of reasons, some of these… (more)

▼ Many legacy nuclear facilities exist with the number of such facilities due to increase in the future. For a variety of reasons, some of these facilities have poorly documented blueprints and floor plans. This has led to many areas within such facilities being left unexplored and in an unknown state for some considerable time. The risk to health that these areas might pose has in some cases precluded human exploration and facilities have been maintained in a containment state for many years. However, in more recent years there has been a move to decommission such facilities. The change of strategy from containment to decommissioning will require knowledge of what it is that needs to be decommissioned. It is hoped that an autonomous or semi- autonomous robotic solution can satisfy the requirement. For successful mapping of such environments, it is required that the robot is capable of producing complete scans of the world around it. As it moves through the environment the robot will not only need to map the presence, type and extent of radioactivity, but do so in a way that is economical from the perspective of battery life. Additionally, the presence of radioactivity presents a threat to the robot electronics. Exposure to radiation will be necessary but should be minimised to prolong the functional life of the robot. Some tethered robots have been developed for such applications, but these can cause issues such as snagging or the tether inadvertently spreading contamination, due to being dragged along the floor. Nuclear environments have very unique challenges, due to the radiation. Alpha and beta radiation have a short emission distance and therefore cannot be detected until the robot is in very close proximity. Although the robot will not become disabled by these forms of radiation, it may become contaminated which is undesirable. Radiation from gamma sources can be detected at range, however pinpointing a source requires sensors to be taken close to the emitter, which has adverse effects on the robot's electronics, for example gamma radiation damages silicon based electronics. Anything entering these environments is deemed to be contaminated and will eventually require disposal. Consequently the number of entries made should ideally be minimised, to reduce the production and spread of potential waste/contamination. This thesis presents results from an investigation of ways to provide complete scans of an environment with novel algorithms which take advantage of common features found in industrial environments and thereby allow for gaps in the data set to be detected. From this data it is then possible to calculate a minimum set of way points required to be visited to allow for all of the gaps to be filled in. This is achieved by taking into account the sensor's parameters such as minimum and maximum sensor range, angle of incidence and optimal sensor distance, along with robot and environmental factors. An investigation into appropriate exploration strategies has been undertaken looking at the ways in which gamma… Advisors/Committee Members: VAN SILFHOUT, ROELOF RG, Lennox, Barry, Van Silfhout, Roelof.

Subjects/Keywords: Robotics; Hazardous Environments; Coverage; Path Planning; Extreme Environments; Void Detection; Collaborative Robotics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wright, T. F. (2018). Characterisation of Remote Nuclear Environments. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:316826

Chicago Manual of Style (16^th Edition):

Wright, Thomas Frederick. “Characterisation of Remote Nuclear Environments.” 2018. Doctoral Dissertation, University of Manchester. Accessed March 03, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:316826.

MLA Handbook (7^th Edition):

Wright, Thomas Frederick. “Characterisation of Remote Nuclear Environments.” 2018. Web. 03 Mar 2021.

Vancouver:

Wright TF. Characterisation of Remote Nuclear Environments. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2021 Mar 03]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:316826.

Council of Science Editors:

Wright TF. Characterisation of Remote Nuclear Environments. [Doctoral Dissertation]. University of Manchester; 2018. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:316826

University of Tennessee – Knoxville

3. Wang, Zhibo. Barrier Coverage in Wireless Sensor Networks.

Degree: 2014, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_graddiss/2872

► Barrier coverage is a critical issue in wireless sensor networks (WSNs) for security applications, which aims to detect intruders attempting to penetrate protected areas. However,… (more)

▼ Barrier coverage is a critical issue in wireless sensor networks (WSNs) for security applications, which aims to detect intruders attempting to penetrate protected areas. However, it is difficult to achieve desired barrier coverage after initial random deployment of sensors because their locations cannot be controlled or predicted. In this dissertation, we explore how to leverage the mobility capacity of mobile sensors to improve the quality of barrier coverage. We first study the 1-barrier coverage formation problem in heterogeneous sensor networks and explore how to efficiently use different types of mobile sensors to form a barrier with pre-deployed different types of stationary sensors. We introduce a novel directional barrier graph model and prove that the minimum cost of mobile sensors required to form a barrier with stationary sensors is the length of the shortest path from the source node to the destination node on the graph. In addition, we formulate the problem of minimizing the cost of moving mobile sensors to fill in the gaps on the shortest path as a minimum cost bipartite assignment problem and solve it in polynomial time using the Hungarian algorithm. We further study the k-barrier coverage formation problem in sensor networks. We introduce a novel weighted barrier graph model and prove that determining the minimum number of mobile sensors required to form k-barrier coverage is related with but not equal to finding k vertex-disjoint paths with the minimum total length on the WBG. With this observation, we propose an optimal algorithm and a faster greedy algorithm to find the minimum number of mobile sensors required to form k-barrier coverage. Finally, we study the barrier coverage formation problem when sensors have location errors. We derive the minimum number of mobile sensors needed to fill in a gap with a guarantee when location errors exist and propose a progressive method for mobile sensor deployment. Furthermore, we propose a fault tolerant weighted barrier graph to find the minimum number of mobile sensors needed to form barrier coverage with a guarantee. Both analytical and experimental studies demonstrated the effectiveness of our proposed algorithms.

Subjects/Keywords: wireless sensor networks; barrier coverage; intruder detection; fault tolerance; Digital Communications and Networking

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, Z. (2014). Barrier Coverage in Wireless Sensor Networks. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/2872

Chicago Manual of Style (16^th Edition):

Wang, Zhibo. “Barrier Coverage in Wireless Sensor Networks.” 2014. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed March 03, 2021. https://trace.tennessee.edu/utk_graddiss/2872.

MLA Handbook (7^th Edition):

Wang, Zhibo. “Barrier Coverage in Wireless Sensor Networks.” 2014. Web. 03 Mar 2021.

Vancouver:

Wang Z. Barrier Coverage in Wireless Sensor Networks. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2014. [cited 2021 Mar 03]. Available from: https://trace.tennessee.edu/utk_graddiss/2872.

Council of Science Editors:

Wang Z. Barrier Coverage in Wireless Sensor Networks. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2014. Available from: https://trace.tennessee.edu/utk_graddiss/2872

Virginia Tech

4. Shams, Zalia. Automated Assessment of Student-written Tests Based on Defect-detection Capability.

Degree: PhD, Computer Science and Applications, 2015, Virginia Tech

URL: http://hdl.handle.net/10919/52024

► Software testing is important, but judging whether a set of software tests is effective is difficult. This problem also appears in the classroom as educators… (more)

▼ Software testing is important, but judging whether a set of software tests is effective is difficult. This problem also appears in the classroom as educators more frequently include software testing activities in programming assignments. The most common measures used to assess student-written software tests are coverage criteria—tracking how much of the student’s code (in terms of statements, or branches) is exercised by the corresponding tests. However, coverage criteria have limitations and sometimes overestimate the true quality of the tests. This dissertation investigates alternative measures of test quality based on how many defects the tests can detect either from code written by other students—all-pairs execution—or from artificially injected changes—mutation analysis. We also investigate a new potential measure called checked code coverage that calculates coverage from the dynamic backward slices of test oracles, i.e. all statements that contribute to the checked result of any test. Adoption of these alternative approaches in automated classroom grading systems require overcoming a number of technical challenges. This research addresses these challenges and experimentally compares different methods in terms of how well they predict defect-detection capabilities of student-written tests when run against over 36,500 known, authentic, human-written errors. For data collection, we use CS2 assignments and evaluate students’ tests with 10 different measures—all-pairs execution, mutation testing with four different sets of mutation operators, checked code coverage, and four coverage criteria. Experimental results encompassing 1,971,073 test runs show that all-pairs execution is the most accurate predictor of the underlying defect-detection capability of a test suite. The second best predictor is mutation analysis with the statement deletion operator. Further, no strong correlation was found between defect-detection capability and coverage measures. Advisors/Committee Members: Edwards, Stephen H. (committeechair), Perez-Quinonez, Manuel A. (committee member), Offutt, Jeff (committee member), Kafura, Dennis G. (committee member), Tilevich, Eli (committee member).

Subjects/Keywords: Software Testing; Automated Assessment; All-pairs Execution; Mutation Testing; Coverage Criteria; Defect-detection Capability

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shams, Z. (2015). Automated Assessment of Student-written Tests Based on Defect-detection Capability. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/52024

Chicago Manual of Style (16^th Edition):

Shams, Zalia. “Automated Assessment of Student-written Tests Based on Defect-detection Capability.” 2015. Doctoral Dissertation, Virginia Tech. Accessed March 03, 2021. http://hdl.handle.net/10919/52024.

MLA Handbook (7^th Edition):

Shams, Zalia. “Automated Assessment of Student-written Tests Based on Defect-detection Capability.” 2015. Web. 03 Mar 2021.

Vancouver:

Shams Z. Automated Assessment of Student-written Tests Based on Defect-detection Capability. [Internet] [Doctoral dissertation]. Virginia Tech; 2015. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10919/52024.

Council of Science Editors:

Shams Z. Automated Assessment of Student-written Tests Based on Defect-detection Capability. [Doctoral Dissertation]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/52024

Johannes Gutenberg Universität Mainz

5. Ament, Irene. Fluctuation spectroscopy of single plasmonic nanostructures.

Degree: 2011, Johannes Gutenberg Universität Mainz

URL: http://ubm.opus.hbz-nrw.de/volltexte/2012/3014/

► Plasmonic nanoparticles are great candidates for sensing applications with optical read-out. Plasmon sensing is based on the interaction of the nanoparticle with electromagnetic waves where… (more)

▼ Plasmonic nanoparticles are great candidates for sensing applications with optical read-out. Plasmon sensing is based on the interaction of the nanoparticle with electromagnetic waves where the particle scatters light at its resonance wavelength. This wavelength depends on several intrinsic factors like material, shape and size of the nanoparticle as well as extrinsic factors like the refractive index of the surrounding medium. The latter allows the nanoparticle to be used as a sensor; changes in the proximate environment can be directly monitored by the wavelength of the emitted light. Due to their minuscule size and high sensitivity this allows individual nanoparticles to report on changes in particle coverage.rnrnTo use this single particle plasmon sensor for future sensing applications it has to meet the demand for detection of incidents on the single molecule level, such as single molecule sensing or even the detection of conformational changes of a single molecule. Therefore, time resolution and sensitivity have to be enhanced as today’s measurement methods for signal read-out are too slow and not sensitive enough to resolve these processes. This thesis presents a new experimental setup, the 'Plasmon Fluctuation Setup', that leads to tremendous improvements in time resolution and sensitivity. This is achieved by implementation of a stronger light source and a more sensitive detector. The new setup has a time resolution in the microsecond regime, an advancement of 4-6 orders of magnitude to previous setups. Its resonance wavelength stability of 0.03 nm, measured with an exposure time of 10 ms, is an improvement of a factor of 20 even though the exposure time is 3000 times shorter than in previous reports. Thus, previously unresolvable wavelength changes of the plasmon sensor induced by minor local environmental alteration can be monitored with extremely high temporal resolution.rnrnUsing the 'Plasmon Fluctuation Setup', I can resolve adsorption events of single unlabeled proteins on an individual nanorod. Additionally, I monitored the dynamic evolution of a single protein binding event on a millisecond time scale. This feasibility is of high interest as the role of certain domains in the protein can be probed by a study of modified analytes without the need for labels possibly introducing conformational or characteristic changes to the target. The technique also resolves equilibrium fluctuations in the coverage, opening a window into observing Brownian dynamics of unlabeled macromolecules. rnrnA further topic addressed in this thesis is the usability of the nanoruler, two nanospheres connected with a spacer molecule, as a stiffness sensor for the interparticle linker under strong illumination. Here, I discover a light induced collapse of the nanoruler. Furthermore, I exploit the sensing volume of a fixed nanorod to study unlabeled analytes diffusing around the nanorod at concentrations that are too high for fluorescence correlation spectroscopy but realistic for biological systems. Additionally, local pH sensing…

Subjects/Keywords: Plasmonischer Sensor; Einzelmolekülsensor; Bedeckungsfluktuation; Nanodimere; plasmon sensor; single molecule detection; coverage fluctuation; nanodimers; Chemistry and allied sciences

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ament, I. (2011). Fluctuation spectroscopy of single plasmonic nanostructures. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2012/3014/

Chicago Manual of Style (16^th Edition):

Ament, Irene. “Fluctuation spectroscopy of single plasmonic nanostructures.” 2011. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 03, 2021. http://ubm.opus.hbz-nrw.de/volltexte/2012/3014/.

MLA Handbook (7^th Edition):

Ament, Irene. “Fluctuation spectroscopy of single plasmonic nanostructures.” 2011. Web. 03 Mar 2021.

Vancouver:

Ament I. Fluctuation spectroscopy of single plasmonic nanostructures. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2011. [cited 2021 Mar 03]. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3014/.

Council of Science Editors:

Ament I. Fluctuation spectroscopy of single plasmonic nanostructures. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2011. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3014/

Texas A&M University

6. Benavides Serrano, Alberto J. Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems.

Degree: PhD, Chemical Engineering, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153985

► The placement of detectors in mitigation systems is a difficult problem usually addressed in the industry via qualitative and semiquantative approaches. Simplifications are used to… (more)

▼ The placement of detectors in mitigation systems is a difficult problem usually addressed in the industry via qualitative and semiquantative approaches. Simplifications are used to circumvent difficulties regarding problem size, parameter uncertainty, and lack of information concerning leak development. Given recent improvement of consequence modeling tools, the use of a stochastic Mixed-Integer Linear Programming (MILP) formulation (SP) was previously proposed to quantitatively approach this problem. This formulation minimizes the expected damage over a large set of gas leak scenarios while assuming perfect detectors. In reality gas detectors are prone to false positives and false negatives. Two solutions are usually implemented in the process industries. First, additional confirmation from several detectors (i.e., voting) is required before emergency actions are triggered in order to avoid false positives. Second, in order to avoid false negatives, the unavailability of the detectors is considered in the placement strategy. Unavailability corresponds to the probability that the detector will not be able to perform its intended function when required. In the first part of this dissertation, two problem formulations were developed and validated to address the issue of imperfect detectors: minimization of expected damage considering unavailability (SP-U) and minimization of the expected damage considering unavailability and voting (SP-UV). SP-U and SP-UV placement results were compared with those obtained assuming perfect detectors. Results demonstrate that explicit consideration of unavailability and voting effects alters the final detector placement. Quantitative risk can be significantly higher if we neglect these issues when solving for the optimal placement. Furthermore, SP-UV placement results were compared with those of four existing approaches for gas detector placement using three different performance metrics in accordance to the objectives of gas detection systems. Results provide further evidence on the effectiveness of the use of dispersion simulations, and mathematical programming, to supplement the gas detector placement problem. Formulation SP-U assumes a uniform unavailability across all detector types and locations. In the second part of this work, this assumption is relaxed via formulation SPqt, which considers non-uniform dynamic detector unavailabilities. Relaxing this assumption results in a Mixed-Integer NonLinear Programming (MINLP) formulation. SPqt, being an extension of SP-U, explicitly considers di↵erent backup detection levels, allowing an approximation where the maximum degree of the nonlinear products considered can be determined by the modeler. The effect of reducing the number of detection levels was analyzed. For the problem, results shown that two detection levels are sufficient to find objective values within 1% of the optimal solution. Considering two detection levels reduces the MINLP formulation to a zero-one quadratic formulation (SPqt-Q). A solution quality comparison between… Advisors/Committee Members: Mannan, Sam (advisor), Laird, Carl (advisor), El-Halwagi, Mahmoud (committee member), Wortman, Martin (committee member).

Subjects/Keywords: Gas Detection; Process Safety; Detector Placement; Stochastic Programming; Mixed-Integer Linear Programming; Mixed-Integer NonLinear Programming; Unavailability; Reliability; Backup Coverage; Voting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Benavides Serrano, A. J. (2014). Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153985

Chicago Manual of Style (16^th Edition):

Benavides Serrano, Alberto J. “Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 03, 2021. http://hdl.handle.net/1969.1/153985.

MLA Handbook (7^th Edition):

Benavides Serrano, Alberto J. “Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems.” 2014. Web. 03 Mar 2021.

Vancouver:

Benavides Serrano AJ. Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1969.1/153985.

Council of Science Editors:

Benavides Serrano AJ. Mathematical Programming Formulations for the Optimal Placement of Imperfect Detectors with Applications to Flammable Gas Detection and Mitigation Systems. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153985

7. Sousa, Marco Décio Baptista. Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks.

Degree: 2017, Repositório Científico do Instituto Politécnico de Lisboa

URL: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7984

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Mestrado em Engenharia Electrónica e Telecomunicações - Dissertação

Self-Organizing Networks (SON) solutions have been developed and implemented in the last years as a Mobile Network… (more)

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Mestrado em Engenharia Electrónica e Telecomunicações - Dissertação

Self-Organizing Networks (SON) solutions have been developed and implemented in the last years as a Mobile Network Operator (MNO) strategy to deal with the complexity of current networks. This research work, focuses on the self-optimization branch of SON solutions. It aims to empower a network with automatic capabilities for detecting and optimizing poor Radio Frequency (RF) performance scenarios. The detection and optimization of those scenarios, is based on Drive Test (DT) data. This leads to the development of a DT classi cation model to assert the quality of data collected through DT for a given cell, as it supports all decision making in terms of detection and optimization of poor RF situations. The DT model was calibrated with subjective testing in the form of inquiries made to fty Radio Access Network (RAN) engineers. Three algorithms were implemented for detection of low coverage and high interference scenarios. Besides identifying and dividing into clusters the DT data that denotes each problem, harshness metrics at cell and cluster level allow to identify the most severe situations. Moreover, an antenna physical parameter optimization algorithm, based on a Particle Swarm Optimization (PSO) algorithm, is able to purpose new Electrical Downtilt (EDT), Mechanical Downtilt (MDT) or the antenna orientation to improve or x the detected RF problems. All algorithms were tested with real MNO DT data and network topology, mainly on urban scenarios, where the detection and optimization is more critical for MNO. Regarding the detection algorithms, in urban scenario, it was established that the situations of high interference were more prevailing than the low coverage. The antenna self-optimization algorithm achieved an average gain of 78% on the tested cases.

As redes SON têm sido, cada vez mais, uma das fortes apostas por parte das operadoras móveis para fazer face a crescente complexidade das redes móveis. Este trabalho de pesquisa foca-se no ramo, das redes SON, de optimização automática. O objectivo e dotar uma rede móvel de capacidades de detecção e optimização de situações de má performance rádio. Tendo em conta que toda a detecção e optimização e baseada em dados recolhidos por DT, surgiu a necessidade de desenvolver um modelo de qualidade para DT. Este modelo e usado como referência em termos de qualidade de dados disponíveis, para cada célula analisada. O modelo de qualidade de DT foi calibrado através de questionários subjectivos, realizados a cinquenta engenheiros rádio. Foram implementados três algoritmos para detecção de situações de má cobertura e interferência. Além de identificar e dividir em clusters os dados de DT com cada um dos problemas mencionados, as métricas de gravidade ao nível do cluster e da célula, permitem identificar os cenários mais graves. Em termos de optimizaçãoo, foi desenvolvido e implementado um algoritmo de optimização de tilts eléctrico e mecânico ou a orientação da antena, com base num algoritmo PSO. Todos…

Advisors/Committee Members: Vieira, Pedro Manuel de Almeida Carvalho, Martins, André Eduardo Ponciano.

Subjects/Keywords: Coverage detection; Interference control; Tilt Optimization; LTE; UMTS; SON; Deteção de cobertura; Controlo de interferência; Optimização de tilts

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sousa, M. D. B. (2017). Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sousa, Marco Décio Baptista. “Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks.” 2017. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed March 03, 2021. https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sousa, Marco Décio Baptista. “Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks.” 2017. Web. 03 Mar 2021.

Vancouver:

Sousa MDB. Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2017. [cited 2021 Mar 03]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sousa MDB. Self-diagnosing and optimization of low coverage and high interference in 3G/4G: radio access networks. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2017. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Franco, Cláudio dos Santos Sala. Detecção de sectores cruzados e optimização de cobertura em redes LTE.

Degree: 2014, Repositório Científico do Instituto Politécnico de Lisboa

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4187

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Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia de Electrónica e Telecomunicações

Actualmente existem três tecnologias distintas a operar em simultâneo,… (more)

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Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia de Electrónica e Telecomunicações

Actualmente existem três tecnologias distintas a operar em simultâneo, a 2ª geração (2G), a 3ª geração (3G) e a 4ª geração (4G). No entanto, para que estas funcionem de forma correcta é necessário um grande trabalho de parameterização e optimização. Tendo essa desvantagem em mente foi idealizado a criação de uma série de algoritmos para facilitar a leitura e avaliação do estado da rede a vários níveis. Esses algoritmos foram produzidos na metodologia das Self-Organizing Networks (SON), que têm o objectivo de optimizar uma série de tarefas associadas ao planeamento e optimização das tecnologias. Este trabalho está dividido entre dois algoritmos, um para detectar sectores que se encontrem trocados entre si e outro que optimiza a cobertura através da alteração de tilts e azimutes. Os algoritmos foram implementados no ambiente de Visual Studio, em C#, com a finalidade de ser incluídos num protótipo da ferramenta Vismon Observer, propriedade da Celfinet. Para possibilitar os testes aos algoritmos foi implementada uma ligação à base de dados da Celfinet. Para além das novas funcionalidades da ferramenta, esta também permite visualizar dados de drive test, eventos ocorridos na rede e a topologia implementada. O algoritmo de crossed sector utiliza método inovadores baseados na contabilização da atenuação de propagação para produzir resultados estatísticos que permitem identificar a maioria dos casos de sectores cruzados com uma certeza superior a 80 %. A optimização de cobertura utiliza um algoritmo genético para avaliar múltiplas estações com múltiplos parâmetros, em simultâneo. Estes dois algoritmos têm como parâmetros de entrada os dados de drive test e a topologia de rede. Foram elaborados dois cenários de teste para o crossed sector. No primeiro é feita uma análise à rede (todas as estações com dados de drive test disponíveis), de forma a descobrir possíveis trocas entre sectores ou erros de detecção. No segundo cenário é formulado uma troca de sectores forçada para observar o funcionamento do algoritmo e algumas particularidades relacionadas com quantidade de bins usada nos cálculos antes e depois da troca. No algoritmo de optimização de cobertura foi formulado um cenário de teste com duas estações que servem uma zona comum. Foi observado uma melhoria no Reference Signal Recieved Power (RSRP) na zona de serviço, aumentando a área de cobertura das estações.

Currently there are three distinct technologies operating simultaneously, the 2nd generation (2G), 3rd generation (3G) and the 4th generation (4G). However, a great effort of of parameterization and optimization is needed so that they work with a target Quality of Service (QoS). Having in mind this disadvantage, a series of algorithms werecreated to facilitate reading and evaluating the …

Advisors/Committee Members: Vieira, Pedro Manuel de Almeida Carvalho, Silva, Nuno Oliveira e.

Subjects/Keywords: Self-organizing networks; Coverage optimization; Crossed sectors detection; LTE; Optimização de cobertura; Detecção de crossed sectors; Vismon

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APA (6^th Edition):

Franco, C. d. S. S. (2014). Detecção de sectores cruzados e optimização de cobertura em redes LTE. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Franco, Cláudio dos Santos Sala. “Detecção de sectores cruzados e optimização de cobertura em redes LTE.” 2014. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed March 03, 2021. http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Franco, Cláudio dos Santos Sala. “Detecção de sectores cruzados e optimização de cobertura em redes LTE.” 2014. Web. 03 Mar 2021.

Vancouver:

Franco CdSS. Detecção de sectores cruzados e optimização de cobertura em redes LTE. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2014. [cited 2021 Mar 03]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Franco CdSS. Detecção de sectores cruzados e optimização de cobertura em redes LTE. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2014. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado

9. Cossel, Kevin C. Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution.

Degree: PhD, Physics, 2014, University of Colorado

URL: https://scholar.colorado.edu/phys_gradetds/119

► This thesis presents a range of different experiments all seeking to extended the capabilities of molecular spectroscopy and enable new applications. The new technique… (more)

▼ This thesis presents a range of different experiments all seeking to extended the capabilities of molecular spectroscopy and enable new applications. The new technique of cavity-enhanced direct frequency comb spectroscopy (CE-DFCS) provides a unique combination of broad bandwidth, high resolution, and high sensitivity that can be useful for a wide range of applications. Previous demonstrations of CE-DFCS were confined to the visible or near-infrared and operated over a limited bandwidth: for many applications it is desirable to increase the spectral coverage and to extend to the mid-infrared where strong, fundamental vibrational modes of molecules occur. There are several key requirements for CE-DFCS: a frequency comb source that provides broad bandwidth and high resolution, an optical cavity for high sensitivity, and a detection system capable of multiplex detection of the comb spectrum transmitted through the cavity. We first discuss comb sources with emphasis on the coherence properties of spectral broadening in nonlinear fiber and the development of a high-power frequency comb source in the mid-infrared based on an optical-parametric oscillator (OPO). To take advantage of this new mid-infrared comb source for spectroscopy, we also discuss the development of a rapid-scan Fourier-transform spectrometer (FTS). We then discuss the first demonstration of CE-DFCS with spectrally broadened light from a highly nonlinear fiber with the application to measurements of impurities in semiconductor manufacturing gases. We also cover our efforts towards extending CE-DFCS to the mid-infrared using the mid-infrared OPO and FTS to measure ppb levels of various gases important for breath analysis and atmospheric chemistry and highlight some future applications of this system. In addition to the study of neutral molecules, broad-bandwidth and high-resolution spectra of molecular ions are useful for astrochemistry where many of the observed molecules are ionic, for studying molecules such as CH₅⁺ with highly non-classical behavior, and for tests of fundamental physics. We have developed a new technique – frequency comb velocity-modulation spectroscopy – that is the first system to enable rapid, broadband spectroscopy of molecular ions with high resolution. We have demonstrated the ability to record 150 cm^-1 of spectra consisting of 45,000 points in 30 minutes and have used this system to record over 1000 cm^-1 of spectra of HfF⁺ in the near-infrared around 800 nm. After improvements, the system can now cover more than 3250 cm^-1 (700-900 nm). We have combined this with standard velocity-modulation spectroscopy to measure and analyze 19 ro-vibronic bands of HfF⁺. These measurements enabled precision spectroscopy of trapped HfF⁺ for testing time-reversal symmetry. For this experiment, we perform Ramsey spectroscopy between spin states in the metastable ³Delta₁ level to look for a permanent electric dipole… Advisors/Committee Members: Jun Ye, Eric A. Cornell, W. Carl Lineberger, J. Matthias Weber, John L. Bohn.

Subjects/Keywords: spectroscopy; spectral coverage; frequency comb; mid-infrared; metastable state preparation; state detection; sensitivity; Atomic, Molecular and Optical Physics; Optics; Physical Chemistry

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APA (6^th Edition):

Cossel, K. C. (2014). Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/phys_gradetds/119

Chicago Manual of Style (16^th Edition):

Cossel, Kevin C. “Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution.” 2014. Doctoral Dissertation, University of Colorado. Accessed March 03, 2021. https://scholar.colorado.edu/phys_gradetds/119.

MLA Handbook (7^th Edition):

Cossel, Kevin C. “Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution.” 2014. Web. 03 Mar 2021.

Vancouver:

Cossel KC. Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution. [Internet] [Doctoral dissertation]. University of Colorado; 2014. [cited 2021 Mar 03]. Available from: https://scholar.colorado.edu/phys_gradetds/119.

Council of Science Editors:

Cossel KC. Techniques in Molecular Spectroscopy: From Broad Bandwidth to High Resolution. [Doctoral Dissertation]. University of Colorado; 2014. Available from: https://scholar.colorado.edu/phys_gradetds/119

Boise State University

10. Kavalapara, Rahul. Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks.

Degree: 2010, Boise State University

URL: https://scholarworks.boisestate.edu/td/133

► Wireless Sensor Networks are generally deployed in harsh environments to perform sensing operations and communication between sensors to report the events in applications like military… (more)

Subjects/Keywords: Fault Tolerance; Coverage; Event Reporting; Event Detection; Backup

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APA (6^th Edition):

Kavalapara, R. (2010). Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks. (Thesis). Boise State University. Retrieved from https://scholarworks.boisestate.edu/td/133

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kavalapara, Rahul. “Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks.” 2010. Thesis, Boise State University. Accessed March 03, 2021. https://scholarworks.boisestate.edu/td/133.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kavalapara, Rahul. “Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks.” 2010. Web. 03 Mar 2021.

Vancouver:

Kavalapara R. Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks. [Internet] [Thesis]. Boise State University; 2010. [cited 2021 Mar 03]. Available from: https://scholarworks.boisestate.edu/td/133.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kavalapara R. Energy-Efficient Fault Tolerant Coverage for Wireless Sensor Networks. [Thesis]. Boise State University; 2010. Available from: https://scholarworks.boisestate.edu/td/133

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Sul

11. Ferreira, Ronaldo Rodrigues. The transactional HW/SW stack for fault tolerant embedded computing.

Degree: 2015, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/114607

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Fault tolerance implementation in embedded systems is challenging because the physical constraints of area occupation, power dissipation, and energy consumption of these systems. The need… (more)

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Fault tolerance implementation in embedded systems is challenging because the physical constraints of area occupation, power dissipation, and energy consumption of these systems. The need for optimizing these three physical constraints while doing computation within the available performance goals and real-time deadlines creates a conundrum that is hard to solve. Classical fault tolerance solutions such as triple and dual modular redundancy are not feasible due to their high power overhead or lack of efficient and deterministic error recovery. Existing techniques, although some of them reduce the power and area overhead, incur heavy perfor- mance penalties and most of the time do not assume a feasible fault model. This dissertation introduces the Transactional HW/SW Stack, or simply Stack, to effi- ciently manage the area, power, fault coverage, and performance conundrum. The Stack introduces a new compilation strategy that assembles programs into Transac- tional Basic Blocks, together with a novel microprocessor, the TransactiOnal Basic Block Architecture (ToBBA), which provides fine-grained error detection and deter- ministic error rollback and elimination using the Transactional Basic Blocks (TBBs) both as a container for errors and as a small unit of data checkpointing. Two so- lutions to sustain the TBB semantics in hardware are introduced: software- and hardware-based. Stack’s area, power, performance, and coverage were evaluated using ToBBA’s hardware implementation model. The Stack attains an error correc- tion coverage of 99.35% with 2.05 power overhead within an area overhead of 2.65. The Stack also presents a performance overhead of 1.33 or 1.54, depending on the hardware model adopted to support the TBB.

O desafio de implementar tolerância a falhas em sistemas embarcados advém das restrições físicas de ocupação de área, dissipação de potência e consumo de energia desses sistemas. A necessidade de otimizar essas três restrições de projeto concomitante à computação dentro dos requisitos de desempenho e de tempo-real cria um problema difícil de ser resolvido. Soluções clássicas de tolerância a falhas tais como redundância modular dupla e tripla não são factíveis devido ao alto custo em potência e a falta de um mecanismo para se recuperar erros. Apesar de algumas técnicas existentes reduzirem o overhead de potência e área, essas incorrem em alta degradação de desempenho e muitas vezes assumem um modelo de falhas que não é factível. Essa tese introduz a Pilha de HW/SW Transacional, ou simplesmente Pilha, para gerenciar de maneira eficiente as restrições de área, potência, cobertura de falhas e desempenho. A Pilha introduz uma nova estratégia de compilação que organiza os programas em Blocos Básicos Transacionais (BBT), juntamente com um novo processador, a Arquitetura de Blocos Básicos Transacionais (ABBT), a qual provê detecção e recuperação de erros de grão fino e determinística ao usar o BBT como um contâiner de erros e como unidade de checkpointing. Duas soluções para prover a semântica de execução do…

Advisors/Committee Members: Carro, Luigi.

Subjects/Keywords: Compiler design; Microeletrônica; Coverage; Sistemas embarcados; Tolerancia : Falhas; Error detection; Error recovery; Fault injection; Hardening by design; Latency; LLVM; Modular redundancy; Register file; Rollback; Single event effects; Soft error

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferreira, R. R. (2015). The transactional HW/SW stack for fault tolerant embedded computing. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/114607

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ferreira, Ronaldo Rodrigues. “The transactional HW/SW stack for fault tolerant embedded computing.” 2015. Thesis, Universidade do Rio Grande do Sul. Accessed March 03, 2021. http://hdl.handle.net/10183/114607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ferreira, Ronaldo Rodrigues. “The transactional HW/SW stack for fault tolerant embedded computing.” 2015. Web. 03 Mar 2021.

Vancouver:

Ferreira RR. The transactional HW/SW stack for fault tolerant embedded computing. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2015. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10183/114607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ferreira RR. The transactional HW/SW stack for fault tolerant embedded computing. [Thesis]. Universidade do Rio Grande do Sul; 2015. Available from: http://hdl.handle.net/10183/114607

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Johannes Gutenberg Universität Mainz

12. Kleiner, Verena. Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics.

Degree: 2014, Johannes Gutenberg Universität Mainz

URL: http://ubm.opus.hbz-nrw.de/volltexte/2014/3846/

►

Biosensors find wide application in clinical diagnostics, bioprocess control and environmental monitoring. They should not only show high specificity and reproducibility but also a high… (more)

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Biosensors find wide application in clinical diagnostics, bioprocess control and environmental monitoring. They should not only show high specificity and reproducibility but also a high sensitivity and stability of the signal. Therefore, I introduce a novel sensor technology based on plasmonic nanoparticles which overcomes both of these limitations. Plasmonic nanoparticles exhibit strong absorption and scattering in the visible and near-infrared spectral range. The plasmon resonance, the collective coherent oscillation mode of the conduction band electrons against the positively charged ionic lattice, is sensitive to the local environment of the particle. I monitor these changes in the resonance wavelength by a new dark-field spectroscopy technique. Due to a strong light source and a highly sensitive detector a temporal resolution in the microsecond regime is possible in combination with a high spectral stability. This opens a window to investigate dynamics on the molecular level and to gain knowledge about fundamental biological processes.rnFirst, I investigate adsorption at the non-equilibrium as well as at the equilibrium state. I show the temporal evolution of single adsorption events of fibrinogen on the surface of the sensor on a millisecond timescale. Fibrinogen is a blood plasma protein with a unique shape that plays a central role in blood coagulation and is always involved in cell-biomaterial interactions. Further, I monitor equilibrium coverage fluctuations of sodium dodecyl sulfate and demonstrate a new approach to quantify the characteristic rate constants which is independent of mass transfer interference and long term drifts of the measured signal. This method has been investigated theoretically by Monte-Carlo simulations but so far there has been no sensor technology with a sufficient signal-to-noise ratio.rnSecond, I apply plasmonic nanoparticles as sensors for the determination of diffusion coefficients. Thereby, the sensing volume of a single, immobilized nanorod is used as detection volume. When a diffusing particle enters the detection volume a shift in the resonance wavelength is introduced. As no labeling of the analyte is necessary the hydrodynamic radius and thus the diffusion properties are not altered and can be studied in their natural form. In comparison to the conventional Fluorescence Correlation Spectroscopy technique a volume reduction by a factor of 5000-10000 is reached.

Biosensoren finden breite Anwendung, vor allem in der klinischen Diagnostik, in der Bioprozesskontrolle sowie in der Umweltüberwachung. Sie sollen dabei nicht nur eine hohe Spezifität und Reproduzierbarkeit, sondern auch eine hohe Sensitivität und Stabilität des Signals aufweisen. Ich stelle daher eine neue Sensortechnologie basierend auf plasmonischen Nanopartikeln vor, die beide dieser Limitationen überwindet. Plasmonische Nanopartikel zeigen starke Absorption und Streuung im sichtbaren und nahinfraroten Spektralbereich. Die Plasmonenresonanz, die kollektive, kohärente Oszillation der Leitungsbandelektronen der…

Subjects/Keywords: Plasmonischer Sensor, Einzelmolekülsensor, Bedeckungsfluktuationen, Adsorptionskinetiken, Diffusionskinetiken; plasmon sensor, single molecule detection, equilibrium coverage fluctuations, adsorption kinetics, diffusion kinetics; Chemistry and allied sciences

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kleiner, V. (2014). Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2014/3846/

Chicago Manual of Style (16^th Edition):

Kleiner, Verena. “Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics.” 2014. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 03, 2021. http://ubm.opus.hbz-nrw.de/volltexte/2014/3846/.

MLA Handbook (7^th Edition):

Kleiner, Verena. “Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics.” 2014. Web. 03 Mar 2021.

Vancouver:

Kleiner V. Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2014. [cited 2021 Mar 03]. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2014/3846/.

Council of Science Editors:

Kleiner V. Plasmonic nanoparticles as sensors : a novel approach to quantify adsorption and diffusion kinetics. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2014. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2014/3846/

13. Zeher, Amar. Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater.

Degree: Docteur es, Instrumentation et informatique de l'image, 2014, Université de Bourgogne

URL: http://www.theses.fr/2014DIJOS077

►

Le déploiement des répéteurs iso-fréquence est une solution économique pour étendre la couverture d’un émetteur principal aux zones d’ombre. Cependant, ce mode de déploiement fait… (more)

▼

Le déploiement des répéteurs iso-fréquence est une solution économique pour étendre la couverture d’un émetteur principal aux zones d’ombre. Cependant, ce mode de déploiement fait apparaître le phénomène des échos radio-fréquence entre antennes d’émission et de réception du répéteur. Selon les standards, un écho aussi faible soit-il réduit le débit de la liaison radio, tandis qu’un écho fort fait courir au répéteur le risque d’endommager ses circuits électroniques, ces risques sont dûs aux ondulations de puissance créées par les échos. L’objectif de cette thèse à caractère industriel est d’étudier ce phénomène naturel en considérant des signaux provenant de différents standards des télécommunications. Cette étude permet une caractérisation des échos radio-fréquence pour mieux s’orienter vers une solution optimisée et industriellement réalisable.Nous nous sommes orientés vers la solution du traitement du signal avancé en favorisant le filtrage adaptatif pour sa rapidité de convergence et sa simplicité relative d’implantation matérielle. Les circuits reconfigurables sont retenus pour leur prix et leur souplesse. L’implantation des solutions est effectuée en virgule fixe afin de satisfaire les exigences de réactivité. Durant la mise en oeuvre de la solution anti-écho, nous avons proposé une multitude de solutions numériques souples et fiables. À partir de ce constat, notre partenaire industriel a décidé de généraliser ce mode de traitement par le développement, la fabrication et la commercialisation de répéteurs de nouvelle génération entièrement numériques.

On-frequency repeaters are a cost-effective solution to extend coverage and enhance wireless communications, especially in shadow areas. However, coupling between the receiving antenna and the transmitting antenna, called radio frequency echo, increases modulation errors and creates oscillations in the system when the echo power is high. According to the communication standards, extremely weak echoes decrease the transmission rate, while strong echoes damage electroni ccircuits because of power peaks. This thesis aims at characterizing the echo phenomenon under different modulations, and proposing an optimized solution directly integrated to industry. We have turned to digital solutions especially the adaptive because of their high convergence rate and their simplicity to be implemented. The programmable circuits are chosen for their attractive price and their flexibility. When implementing echo cancellation solution, we proposed several reliable solutions, showing that digital processing is much more beneficial. For this reason, digital solutions are generalized, and the new generation of repeaters is fully digital.

Advisors/Committee Members: Binczak, Stéphane (thesis director), Bilbault, Jean-Marie (thesis director), Joli, Jérôme (thesis director).

Subjects/Keywords: Répéteur; Couverture; Iso-fréquence; Annulation d’écho; Filtre adaptatif; Détection; Prédistorsion; FPGA; Microprocesseur; Repeater; Coverage; On-frequency; Echo cancellation; Adaptive filtering; Detection; Predistortion; FPGA; Microprocessor; 621.382

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zeher, A. (2014). Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater. (Doctoral Dissertation). Université de Bourgogne. Retrieved from http://www.theses.fr/2014DIJOS077

Chicago Manual of Style (16^th Edition):

Zeher, Amar. “Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater.” 2014. Doctoral Dissertation, Université de Bourgogne. Accessed March 03, 2021. http://www.theses.fr/2014DIJOS077.

MLA Handbook (7^th Edition):

Zeher, Amar. “Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater.” 2014. Web. 03 Mar 2021.

Vancouver:

Zeher A. Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater. [Internet] [Doctoral dissertation]. Université de Bourgogne; 2014. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2014DIJOS077.

Council of Science Editors:

Zeher A. Système d'annulation d'écho pour répéteur iso-fréquence : contribution à l'élaboration d'un répéteur numérique de nouvelle génération : Echo cancellation system for iso-frequency repeaters : contribution to the development of a new generation digital repeater. [Doctoral Dissertation]. Université de Bourgogne; 2014. Available from: http://www.theses.fr/2014DIJOS077

14. Laghate, Mihir Vijay. Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum.

Degree: Electrical Engineering, 2017, UCLA

URL: http://www.escholarship.org/uc/item/0r83c669

► The increasing demand for wireless connectivity and the scarcity of spectrum for exclusive use have popularized the idea of multiple communication systems to share spectrum.… (more)

▼ The increasing demand for wireless connectivity and the scarcity of spectrum for exclusive use have popularized the idea of multiple communication systems to share spectrum. For a network to estimate its own link budget while avoiding interference from neighboring, or incumbent, networks, it needs to learn the incumbent networks' spatial, spectral, and temporal usage patterns. Instead of manually modifying the standard of each network to ensure such a coexistence, we can, as proposed by Mitola and Haykin, build learning or cognitive abilities into the radios themselves and automate the process. In this work, we propose methods for such a cognitive network to cooperatively learn the spatial and spectral occupancy of incumbent users (IUs) and the topologies of the incumbent networks. In contrast to the existing literature on spectrum sensing, this work studies the problems of detecting, distinguishing, and coexisting with multiple communicating incumbent networks rather than that of avoiding interference to single broadcasting transmitters. Our methods are designed to make these inferences without prior knowledge of the number of IUs, their locations, network topologies, transmission protocols, and channel models of the ambient wireless environment. We also do not require knowledge of the locations of the cognitive radios (CRs).We begin with a conventional cooperative spectrum sensing scenario where the CR network fuses binary reports from multiple CRs to infer the spectral occupancy of a single intermittently transmitting IU. We show that though a second a priori unknown IU or interferer would cause correlations in the CR reports and this correlation structure can be learned, it is not possible to distinguish whether the correlations are caused by another IU, channel correlations, or malicious intent. Instead, we propose learning the correlation structure and then use this structure to infer the spectrum occupancy of the single IU.Next, we propose algorithms to learn the footprint of each incumbent transmitter, i.e., the sets of CRs that receive signals from that incumbent transmitter. By learning the Gaussian mixture distribution of the received energy vector, we show that multiple transmitters' footprints can be learnt irrespective of their spatial overlap and potentially anisotropic shape.Learning the footprints also enables sampling the activity of each incumbent radio. By identifying radios that transmit a response to the transmission of another, we learn the causal links between pairs of incumbent radios, i.e., the topologies of the incumbent networks. Hence, we can identify the potential receivers when a particular incumbent radio is transmitting and the cognitive network can potentially avoid interference to these receivers.Finally, we consider the problem of detecting frequency bands occupied by intermittent transmitters using a single antenna wideband sensor. Using only power spectrum measurements, we first automatically learn the noise power spectrum of the sensor and then learn the frequency bands…

Subjects/Keywords: Electrical engineering; Cognitive communication; Collusion; Receiver detection; Spatial coverage

…5.4 5.5 5.3.1 Detection of Noise-Only Measurements . . . . . . . . . . . . . . . . . 126… …against a protection region around the receiver. Dotted lines indicate spatial coverage area of… …number of colluding pairs of CRs and total number of CRs. Detection probability for structure… …changing each individual CR’s detection probability while its false alarm probability is held… …3.8 71 75 Effect on detection performance when threshold ζ is varied from 0.95 to 0.99…

5 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Laghate, M. V. (2017). Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/0r83c669

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Laghate, Mihir Vijay. “Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum.” 2017. Thesis, UCLA. Accessed March 03, 2021. http://www.escholarship.org/uc/item/0r83c669.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Laghate, Mihir Vijay. “Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum.” 2017. Web. 03 Mar 2021.

Vancouver:

Laghate MV. Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum. [Internet] [Thesis]. UCLA; 2017. [cited 2021 Mar 03]. Available from: http://www.escholarship.org/uc/item/0r83c669.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Laghate MV. Learning Wireless Networks’ Footprints and Topologies in Shared Spectrum. [Thesis]. UCLA; 2017. Available from: http://www.escholarship.org/uc/item/0r83c669

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Hanaf, Anas. Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network.

Degree: Docteur es, Génie Informatique, automatique et traitement du signal, 2016, Reims

URL: http://www.theses.fr/2016REIMS018

►

Les algorithmes distribués de consensus sont des algorithmes itératifs de faible complexité où les nœuds de capteurs voisins interagissent les uns avec les autres pour… (more)

▼

Les algorithmes distribués de consensus sont des algorithmes itératifs de faible complexité où les nœuds de capteurs voisins interagissent les uns avec les autres pour parvenir à un accord commun sans unité coordinatrice. Comme les nœuds dans un réseau de capteurs sans fil ont une puissance de calcul et une batterie limitées, ces algorithmes distribués doivent parvenir à un consensus en peu de temps et avec peu d’échange de messages. La première partie de cette thèse s’est basée sur l’étude et la comparaison des différents algorithmes de consensus en mode synchrone et asynchrone en termes de vitesse de convergence et taux de communications. La seconde partie de nos travaux concerne l’application de ces algorithmes de consensus au problème de la détection de trous de couverture dans les réseaux de capteurs sans fil.Ce problème de couverture fournit aussi le contexte de la suite de nos travaux. Il se décrit comme étant la façon dont une région d’intérêt est surveillée par des capteurs. Différentes approches géométriques ont été proposées mais elles sont limitées par la nécessité de connaitre exactement la position des capteurs ; or cette information peut ne pas être disponible si les dispositifs de localisation comme par exemple le GPS ne sont pas sur les capteurs. À partir de l’outil mathématique appelé topologie algébrique, nous avons développé un algorithme distribué de détection de trous de couverture qui recherche une fonction harmonique d’un réseau, c’est-à-dire annulant l’opérateur du Laplacien de dimension 1. Cette fonction harmonique est reliée au groupe d’homologie H1 qui recense les trous de couverture. Une fois une fonction harmonique obtenue, la détection des trous se réalise par une simple marche aléatoire dans le réseau.

Distributed consensus algorithms are iterative algorithms of low complexity where neighboring sensors interact with each other to reach an agreement without coordinating unit. As the nodes in a wireless sensor network have limited computing power and limited battery, these distributed algorithms must reach a consensus in a short time and with little message exchange. The first part of this thesis is based on the study and comparison of different consensus algorithms synchronously and asynchronously in terms of convergence speed and communication rates. The second part of our work concerns the application of these consensus algorithms to the problem of detecting coverage holes in wireless sensor networks.This coverage problem also provides the context for the continuation of our work. This problem is described as how a region of interest is monitored by sensors. Different geometrical approaches have been proposed but are limited by the need to know exactly the position of the sensors; but this information may not be available if the locating devices such as GPS are not on the sensors. From the mathematical tool called algebraic topology, we have developed a distributed algorithm of coverage hole detection searching a harmonic function of a network, that is to say canceling the operator…

Advisors/Committee Members: Gellé, Guillaume (thesis director).

Subjects/Keywords: Consensus de moyenne; Algorithmes distribués; Topologie algébrique; Detection des trous de couverture; Théorie des graphes; Réseau de capteurs; Average consensus; Distributed algorithms; Algebraic topology; Coverage hole detection; Graph theory; Sensors network

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hanaf, A. (2016). Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network. (Doctoral Dissertation). Reims. Retrieved from http://www.theses.fr/2016REIMS018

Chicago Manual of Style (16^th Edition):

Hanaf, Anas. “Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network.” 2016. Doctoral Dissertation, Reims. Accessed March 03, 2021. http://www.theses.fr/2016REIMS018.

MLA Handbook (7^th Edition):

Hanaf, Anas. “Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network.” 2016. Web. 03 Mar 2021.

Vancouver:

Hanaf A. Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network. [Internet] [Doctoral dissertation]. Reims; 2016. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2016REIMS018.

Council of Science Editors:

Hanaf A. Algorithmes distribués de consensus de moyenne et leurs applications dans la détection des trous de couverture dans un réseau de capteurs : Distributed average consensus algorithms and their applications to detect coverage hole in sensors network. [Doctoral Dissertation]. Reims; 2016. Available from: http://www.theses.fr/2016REIMS018

University of Cincinnati

16. Venkataraman, Aparna. Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection.

Degree: MS, Engineering and Applied Science: Computer Science, 2011, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773833

► There are many ways to geographically determine the boundary of an event based on its location and its nature through Satellite imaging and other learning… (more)

▼ There are many ways to geographically determine the boundary of an event based on its location and its nature through Satellite imaging and other learning mechanisms. In these methods, the availability of resources to perform the detection, their capabilities, actual time available to determine the event and its accessibility are constraints. At times, the satellite images may not be sufficient to get complete information about an event. Here we consider a particular case where the aim is to detect the actual boundary of an event based on its estimated boundary with the above constraints. A typical situation would be to determine the actual boundary of fire given the smoke area, or to estimate the concentration of chemical content, ideally any situation where sensors need to be used in an unmanned situation. We use a deploying agent to drop the sensors and there is a Base Station (BS) to which the event details are communicated by connectivity through localization with neighboring sensors. The research targets dynamic deployment of sensors with coverage and connectivity handled simultaneously as the information can reach the base station only if the sensors are able to connect to it. This is critical for real time applications. So we use an intelligent distribution scheme to test the behavior of different kinds of deployments using random, Gaussian, controlled random and combinational methods to deploy sensors. The set of parameters which are constraints are the communication radius of the base station, sensors & the event, the proximity of the event from the base station and location determination of the event based on the current state of the system. We use a weighted approach with more sensors around the event border and lesser inside to be able to detect the event and yet preserve the sensors as they might be lost due to fire or damage depending on the event. Additionally partial event boundary detection is used as experiment results show that we can reduce the number of sensors by nearly 50% when 80% of the sensors deployed are connected as against 100% connectivity. Test cases also involve multiple BS & deploying agents with parallel control. This will be useful in emergency situations and specifically in situations which do not have pre-deployed sensors wherein, time and resources available are important constraints. Advisors/Committee Members: Agrawal, Dharma (Committee Chair).

Subjects/Keywords: Computer Science; Dynamic network deployment strategies; realtime partial boundary detection; ad-hoc wireless sensor networks; localization; coverage connectivity detectivity; unknown event boundary detection

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Venkataraman, A. (2011). Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773833

Chicago Manual of Style (16^th Edition):

Venkataraman, Aparna. “Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection.” 2011. Masters Thesis, University of Cincinnati. Accessed March 03, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773833.

MLA Handbook (7^th Edition):

Venkataraman, Aparna. “Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection.” 2011. Web. 03 Mar 2021.

Vancouver:

Venkataraman A. Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection. [Internet] [Masters thesis]. University of Cincinnati; 2011. [cited 2021 Mar 03]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773833.

Council of Science Editors:

Venkataraman A. Dynamic Deployment strategies in Ad-Hoc Sensor networks to optimize Coverage and Connectivity in Unknown Event Boundary detection. [Masters Thesis]. University of Cincinnati; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773833

University of Pretoria

17. [No author]. Efficacy of a community-based infant hearing screening program in the Western Cape .

Degree: 2013, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-12032012-191105/

► Apart from isolated programs in private and public health care sectors, South Africa has no existing systematic public infant hearing screening program at community level.… (more)

▼ Apart from isolated programs in private and public health care sectors, South Africa has no existing systematic public infant hearing screening program at community level. As a result, early identification of hearing loss is certainly not being attained for the majority of infants in South Africa with far-reaching effects for individuals, families and society at large. Screening programs at primary health care immunization clinics have been proposed as an alternative to hospital-based programs in South Africa. The objective of this study was to evaluate the first systematic community-based infant hearing screening program in a developing South African community in the Western Cape. A combined descriptive and exploratory research methodology was followed incorporating aspects of a program evaluation design. The study was of a quantitative nature and the required data were collected by means of a questionnaire and OAE testing conducted by clinic nurses on subjects. A community-based universal infant hearing screening program initiated at eight primary health care clinics in the Cape Metropolitan area was evaluated over a 19-month research period. During this time 6227 infants who were candidates for screening attended their 6, 10 or 14-week immunization visit at the relevant clinic. Clinic nurses were trained as screening personnel. A two-stage distortion product otoacoustic emissions screening protocol was utilized. The target disorder for this study was bilateral permanent congenital and early onset hearing loss and infants referring the first screen were scheduled for a 4-week follow-up visit at the clinic. Diagnostic audiological and medical evaluations were scheduled at referral hospitals when indicated. The study evaluated the efficacy of the program based on coverage, referral and follow-up rates and diagnostic outcomes according to guidelines specified by the Health Professions Council of South Africa 2007 Position Statement. Overall coverage rate across the eight clinics was 32.4% with 2018 infants (aged 0- 14 weeks) screened. The mean age of the sample at first stage screen was 3.9 weeks of age and 13.5 weeks of age for first hospital visit. Overall first stage screen referral rate was 9.5% with 62 subjects (3%) referred for diagnostic services at hospital level after a follow-up screen. The average follow-up rate for rescreens at clinic level was 85.1% and for initial diagnostic assessments at hospital level it was 91.8%. Although minimal hearing loss was not the primary focus of the screening program the outcomes did include those subjects with fluctuating conductive hearing loss and permanent unilateral hearing loss. Prevalence rates were 4.5/1000 with significant hearing loss, including sensorineural (1.5/1000) and conductive (3/1000) losses, and 12.9/1000 for subjects with middle ear effusion.<p-> The community-based infant hearing screening program was valuable in attaining high follow-up return rates but reaching sufficient coverage may require dedicated screening personnel as opposed to existing… Advisors/Committee Members: Prof DeW Swanepoel (advisor).

Subjects/Keywords: Middle ear effusion; Pilot project; Follow-up rate; Referral rate; Coverage; Developing countries; Developed countries; Universal newborn hearing screening; Early hearing detection and intervention; Infant hearing loss; Immunization clinics; Otoacoustic emissions; UCTD

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

author], [. (2013). Efficacy of a community-based infant hearing screening program in the Western Cape . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-12032012-191105/

Chicago Manual of Style (16^th Edition):

author], [No. “Efficacy of a community-based infant hearing screening program in the Western Cape .” 2013. Masters Thesis, University of Pretoria. Accessed March 03, 2021. http://upetd.up.ac.za/thesis/available/etd-12032012-191105/.

MLA Handbook (7^th Edition):

author], [No. “Efficacy of a community-based infant hearing screening program in the Western Cape .” 2013. Web. 03 Mar 2021.

Vancouver:

author] [. Efficacy of a community-based infant hearing screening program in the Western Cape . [Internet] [Masters thesis]. University of Pretoria; 2013. [cited 2021 Mar 03]. Available from: http://upetd.up.ac.za/thesis/available/etd-12032012-191105/.

Council of Science Editors:

author] [. Efficacy of a community-based infant hearing screening program in the Western Cape . [Masters Thesis]. University of Pretoria; 2013. Available from: http://upetd.up.ac.za/thesis/available/etd-12032012-191105/

University of Pretoria

18. Friderichs, Niki. Efficacy of a community-based infant hearing screening program in the Western Cape.

Degree: Speech-Language Pathology and Audiology, 2013, University of Pretoria

URL: http://hdl.handle.net/2263/30084

► Apart from isolated programs in private and public health care sectors, South Africa has no existing systematic public infant hearing screening program at community level.… (more)

▼ Apart from isolated programs in private and public health care sectors, South Africa has no existing systematic public infant hearing screening program at community level. As a result, early identification of hearing loss is certainly not being attained for the majority of infants in South Africa with far-reaching effects for individuals, families and society at large. Screening programs at primary health care immunization clinics have been proposed as an alternative to hospital-based programs in South Africa. The objective of this study was to evaluate the first systematic community-based infant hearing screening program in a developing South African community in the Western Cape. A combined descriptive and exploratory research methodology was followed incorporating aspects of a program evaluation design. The study was of a quantitative nature and the required data were collected by means of a questionnaire and OAE testing conducted by clinic nurses on subjects. A community-based universal infant hearing screening program initiated at eight primary health care clinics in the Cape Metropolitan area was evaluated over a 19-month research period. During this time 6227 infants who were candidates for screening attended their 6, 10 or 14-week immunization visit at the relevant clinic. Clinic nurses were trained as screening personnel. A two-stage distortion product otoacoustic emissions screening protocol was utilized. The target disorder for this study was bilateral permanent congenital and early onset hearing loss and infants referring the first screen were scheduled for a 4-week follow-up visit at the clinic. Diagnostic audiological and medical evaluations were scheduled at referral hospitals when indicated. The study evaluated the efficacy of the program based on coverage, referral and follow-up rates and diagnostic outcomes according to guidelines specified by the Health Professions Council of South Africa 2007 Position Statement. Overall coverage rate across the eight clinics was 32.4% with 2018 infants (aged 0- 14 weeks) screened. The mean age of the sample at first stage screen was 3.9 weeks of age and 13.5 weeks of age for first hospital visit. Overall first stage screen referral rate was 9.5% with 62 subjects (3%) referred for diagnostic services at hospital level after a follow-up screen. The average follow-up rate for rescreens at clinic level was 85.1% and for initial diagnostic assessments at hospital level it was 91.8%. Although minimal hearing loss was not the primary focus of the screening program the outcomes did include those subjects with fluctuating conductive hearing loss and permanent unilateral hearing loss. Prevalence rates were 4.5/1000 with significant hearing loss, including sensorineural (1.5/1000) and conductive (3/1000) losses, and 12.9/1000 for subjects with middle ear effusion.<p-> The community-based infant hearing screening program was valuable in attaining high follow-up return rates but reaching sufficient coverage may require dedicated screening personnel as opposed to existing… Advisors/Committee Members: Prof DeW Swanepoel (advisor).

Subjects/Keywords: Middle ear effusion; Pilot project; Follow-up rate; Referral rate; Coverage; Developing countries; Developed countries; Universal newborn hearing screening; Early hearing detection and intervention; Infant hearing loss; Immunization clinics; Otoacoustic emissions; UCTD

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Friderichs, N. (2013). Efficacy of a community-based infant hearing screening program in the Western Cape. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/30084

Chicago Manual of Style (16^th Edition):

Friderichs, Niki. “Efficacy of a community-based infant hearing screening program in the Western Cape.” 2013. Masters Thesis, University of Pretoria. Accessed March 03, 2021. http://hdl.handle.net/2263/30084.

MLA Handbook (7^th Edition):

Friderichs, Niki. “Efficacy of a community-based infant hearing screening program in the Western Cape.” 2013. Web. 03 Mar 2021.

Vancouver:

Friderichs N. Efficacy of a community-based infant hearing screening program in the Western Cape. [Internet] [Masters thesis]. University of Pretoria; 2013. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/2263/30084.

Council of Science Editors:

Friderichs N. Efficacy of a community-based infant hearing screening program in the Western Cape. [Masters Thesis]. University of Pretoria; 2013. Available from: http://hdl.handle.net/2263/30084

Brno University of Technology

19. Beluský, Tomáš. Detekce genomových variací: Detection of Genome Variations.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/53540

► An influence of variations in human genome is perceptible at a first glance on human itself to see differences between the individuals and entire populations.… (more)

Subjects/Keywords: genom; strukturní variace; detekce variací; sekvenování DNA; zarovnání sekvence; mapování DNA; párové ready; hloubka pokrytí; referenční genom; genome; structural variations; DNA sequencing; variation detection; sequence alignment; DNA mapping; paired reads; depth of coverage; reference genome

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Beluský, T. (2019). Detekce genomových variací: Detection of Genome Variations. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/53540

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Beluský, Tomáš. “Detekce genomových variací: Detection of Genome Variations.” 2019. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/53540.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Beluský, Tomáš. “Detekce genomových variací: Detection of Genome Variations.” 2019. Web. 03 Mar 2021.

Vancouver:

Beluský T. Detekce genomových variací: Detection of Genome Variations. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/53540.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Beluský T. Detekce genomových variací: Detection of Genome Variations. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/53540

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

20. Sojka, Stanislav. Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/55765

► This bachelor thesis describes the algorithms and methods of control of robotic vacuum cleaners in an unknown environment. It describes the principles of methods and their… (more)

Subjects/Keywords: Robotický vysavač; pokrytí prostoru; buňka; dekompozice na buňky; Boustrophedon dekompozice; Lichoběžníková dekompozice; Dekompozice řezem; lokalizace; detekce překážek.; Robotic vacuum cleaner; coverage area; cell; cell decomposition; Boustrophedon decomposition; Trapezoidal decomposition; Slice decomposition; location; detection of obstacles.

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sojka, S. (2019). Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/55765

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sojka, Stanislav. “Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner.” 2019. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/55765.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sojka, Stanislav. “Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner.” 2019. Web. 03 Mar 2021.

Vancouver:

Sojka S. Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/55765.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sojka S. Implementace robotického vysavače: Implementation of the Robotic Vacuum Cleaner. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/55765

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

AUT University

21. Do, TheAnh. Goal-oriented dynamic test generation .

Degree: AUT University

URL: http://hdl.handle.net/10292/7404

► Automated software testing is increasingly being seen as an important means of improving the quality and reliability of software in industry. It mitigates the hardship… (more)

▼ Automated software testing is increasingly being seen as an important means of improving the quality and reliability of software in industry. It mitigates the hardship of manual testing, which is labour-intensive and error-prone, and alleviates the expensive cost of software testing, which often accounts for around half of total software development costs. One way of enhancing automated software testing is to automate the process of test input generation. Over the last three decades, a considerable research effort has attempted to achieve this goal. This thesis concentrates on the scalability problem of the test input generation process, which lies at the heart of the automation of the software testing process. It develops techniques to perform test input generation in a goal-oriented mechanism in order to achieve high structural coverage criteria and maximize security vulnerability detection. The techniques developed in this thesis are based on well-established theoretical foundations of program analysis and software testing. They distinguish themselves from existing techniques through their capability to precisely identify a root cause leading to the execution of a specific test goal and to perform test input generation in a directed automated manner toward effectively and efficiently exploring the test goal. A comparative evaluation was conducted via two sets of experiments in which our proposed techniques significantly outperformed existing techniques. Specifically, on a benchmark of 15 simulated and real world test subjects, our structural coverage testing technique significantly optimized the test input generation effort to achieve the highest structural coverage when compared to state-of-the-art techniques. Additionally, on a benchmark of 23 buffer overflow vulnerabilities, our security testing technique discovered security vulnerability defects within a matter of a few seconds, while existing techniques failed even after 30 minutes of testing on a number of test subjects. This thesis contributes to scientific knowledge by enriching the application of computer science theory, and proposes techniques to improve the efficiency of automated software testing. Advisors/Committee Members: Fong, Alvis (advisor), Pears, Russel (advisor).

Subjects/Keywords: Program analysis; Program dependence analysis; Symbolic execution; Automated software testing; Structural coverage; Security vulnerability detection

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Do, T. (n.d.). Goal-oriented dynamic test generation . (Thesis). AUT University. Retrieved from http://hdl.handle.net/10292/7404

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Do, TheAnh. “Goal-oriented dynamic test generation .” Thesis, AUT University. Accessed March 03, 2021. http://hdl.handle.net/10292/7404.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Do, TheAnh. “Goal-oriented dynamic test generation .” Web. 03 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Do T. Goal-oriented dynamic test generation . [Internet] [Thesis]. AUT University; [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10292/7404.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Do T. Goal-oriented dynamic test generation . [Thesis]. AUT University; Available from: http://hdl.handle.net/10292/7404

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Brno University of Technology

22. Nacev, Nikola. Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/3300

► The deals of thesis were described methods for designing safety applications, made analysis of possible microcontroller faults of long-run system, described software and hardware methods… (more)

Subjects/Keywords: FMEA; FTA; analýza poruch; metody detekce poruch; poruchy SRAM paměti; March testy; PMOVI; MATS+; March SS; chybové pokrytí; doba trvání testu; checkerboard test; FMEA; FTA; fault analyse; fault detection methods; SRAM faults; March tests; PMOVI; MATS+; March SS; fault coverage; testing time; checkerboard test

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nacev, N. (2018). Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/3300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nacev, Nikola. “Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications.” 2018. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/3300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nacev, Nikola. “Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications.” 2018. Web. 03 Mar 2021.

Vancouver:

Nacev N. Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/3300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nacev N. Bezpečné aplikace s mikrokontroléry: Safety Microcontroller Applications. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/3300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Wright, Thomas. Characterisation of remote nuclear environments.

Degree: PhD, 2018, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-remote-nuclear-environments(a7f7d1ba-c866-439e-ac0e-d3f88c76986a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.764586

► Many legacy nuclear facilities exist with the number of such facilities due to increase in the future. For a variety of reasons, some of these… (more)

▼ Many legacy nuclear facilities exist with the number of such facilities due to increase in the future. For a variety of reasons, some of these facilities have poorly documented blueprints and floor plans. This has led to many areas within such facilities being left unexplored and in an unknown state for some considerable time. The risk to health that these areas might pose has in some cases precluded human exploration and facilities have been maintained in a containment state for many years. However, in more recent years there has been a move to decommission such facilities. The change of strategy from containment to decommissioning will require knowledge of what it is that needs to be decommissioned. It is hoped that an autonomous or semi- autonomous robotic solution can satisfy the requirement. For successful mapping of such environments, it is required that the robot is capable of producing complete scans of the world around it. As it moves through the environment the robot will not only need to map the presence, type and extent of radioactivity, but do so in a way that is economical from the perspective of battery life. Additionally, the presence of radioactivity presents a threat to the robot electronics. Exposure to radiation will be necessary but should be minimised to prolong the functional life of the robot. Some tethered robots have been developed for such applications, but these can cause issues such as snagging or the tether inadvertently spreading contamination, due to being dragged along the floor. Nuclear environments have very unique challenges, due to the radiation. Alpha and beta radiation have a short emission distance and therefore cannot be detected until the robot is in very close proximity. Although the robot will not become disabled by these forms of radiation, it may become contaminated which is undesirable. Radiation from gamma sources can be detected at range, however pinpointing a source requires sensors to be taken close to the emitter, which has adverse effects on the robot's electronics, for example gamma radiation damages silicon based electronics. Anything entering these environments is deemed to be contaminated and will eventually require disposal. Consequently the number of entries made should ideally be minimised, to reduce the production and spread of potential waste/contamination. This thesis presents results from an investigation of ways to provide complete scans of an environment with novel algorithms which take advantage of common features found in industrial environments and thereby allow for gaps in the data set to be detected. From this data it is then possible to calculate a minimum set of way points required to be visited to allow for all of the gaps to be filled in. This is achieved by taking into account the sensor's parameters such as minimum and maximum sensor range, angle of incidence and optimal sensor distance, along with robot and environmental factors. An investigation into appropriate exploration strategies has been undertaken looking at the ways in which gamma…

Subjects/Keywords: 629.8; Collaborative Robotics; Extreme Environments; Void Detection; Coverage; Hazardous Environments; Robotics; Path Planning

…2.22 Overview of void detection algorithm, with valid void markers shown in red and markers… …Basic void detection algorithm . . . . . . . . . . . . . . . . . . . . . . . 54 2.26… …void detection of a box with a void in the forward face . . 61 8 2.28 Initial processing… …of the corridor scene to allow the void detection to take place… …offer complete coverage of a void…

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APA (6^th Edition):

Wright, T. (2018). Characterisation of remote nuclear environments. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-remote-nuclear-environments(a7f7d1ba-c866-439e-ac0e-d3f88c76986a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.764586

Chicago Manual of Style (16^th Edition):

Wright, Thomas. “Characterisation of remote nuclear environments.” 2018. Doctoral Dissertation, University of Manchester. Accessed March 03, 2021. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-remote-nuclear-environments(a7f7d1ba-c866-439e-ac0e-d3f88c76986a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.764586.

MLA Handbook (7^th Edition):

Wright, Thomas. “Characterisation of remote nuclear environments.” 2018. Web. 03 Mar 2021.

Vancouver:

Wright T. Characterisation of remote nuclear environments. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2021 Mar 03]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-remote-nuclear-environments(a7f7d1ba-c866-439e-ac0e-d3f88c76986a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.764586.

Council of Science Editors:

Wright T. Characterisation of remote nuclear environments. [Doctoral Dissertation]. University of Manchester; 2018. Available from: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-remote-nuclear-environments(a7f7d1ba-c866-439e-ac0e-d3f88c76986a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.764586

24. Vu, Chinh Trung. Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks.

Degree: PhD, Computer Science, 2009, Georgia State University

URL: https://scholarworks.gsu.edu/cs_diss/37

► Wireless sensor networks (WSNs) have recently attracted a great deal of attention due to their numerous attractive applications in many different fields. Sensors and WSNs… (more)

▼ Wireless sensor networks (WSNs) have recently attracted a great deal of attention due to their numerous attractive applications in many different fields. Sensors and WSNs possess a number of special characteristics that make them very promising in a wide range of applications, but they also put on them lots of constraints that make issues in sensor network particularly challenging. These issues may include topology control, routing, coverage, security, data management and many others. Among them, coverage problem is one of the most fundamental ones for which a WSN has to watch over the environment such as a forest (area coverage) or set of subjects such as collection of precious renaissance paintings (target of point coverage) in order for the network to be able to collect environment parameters, and maybe further monitor the environment. In this dissertation, we highly focus on the area coverage problem. With no assumption of sensors’ locations (i.e., the sensor network is randomly deployed), we only consider distributed and parallel scheduling methods with the ultimate objective of maximizing network lifetime. Additionally, the proposed solutions (including algorithms, a scheme, and a framework) have to be energy-efficient. Generally, we investigate numerous generalizations and variants of the basic coverage problem. Those problems of interest include k-coverage, composite event detection, partial coverage, and coverage for adjustable sensing range network. Various proposed algorithms. In addition, a scheme and a framework are also suggested to solve those problems. The scheme, which is designed for emergency alarming applications, specifies the guidelines for data and communication patterns that significantly reduce the energy consumption and guarantee very low notification delay. For partial coverage problem, we propose a universal framework (consisting of four strategies) which can take almost any complete-coverage algorithm as an input to generate an algorithm for partial coverage. Among the four strategies, two pairs of strategies are trade-off in terms of network lifetime and coverage uniformity. Extensive simulations are conducted to validate the efficiency of each of our proposed solutions. Advisors/Committee Members: Dr. Yingshu Li - Chair, Dr. Rajshekhar Sunderraman, Dr. Yi Zhao, Dr. Xiaojun Cao, Dr. Anu G. Bourgeois.

Subjects/Keywords: k-Coverage; Energy-efficiency; Wireless Sensor Network; Adjustable Sensing Range WSN; Coverage Problem; Localized and Distributed Algorithm; Connectivity; Parallel Algorithm; Fault-Tolerance; Partial Coverage; Composite Event Detection; Robustness; Computer Sciences

…Complete coverage Partial Coverage Composite event detection Universal framework 4 conversion… …4 1.3. Coverage variants and our main focus… …6 1.4. Area coverage vs. target coverage… …16 2.1. Classification of coverage algorithms in the literature… …18 2.3. Sensors scheduling to achieve coverage/connectivity…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vu, C. T. (2009). Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks. (Doctoral Dissertation). Georgia State University. Retrieved from https://scholarworks.gsu.edu/cs_diss/37

Chicago Manual of Style (16^th Edition):

Vu, Chinh Trung. “Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks.” 2009. Doctoral Dissertation, Georgia State University. Accessed March 03, 2021. https://scholarworks.gsu.edu/cs_diss/37.

MLA Handbook (7^th Edition):

Vu, Chinh Trung. “Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks.” 2009. Web. 03 Mar 2021.

Vancouver:

Vu CT. Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks. [Internet] [Doctoral dissertation]. Georgia State University; 2009. [cited 2021 Mar 03]. Available from: https://scholarworks.gsu.edu/cs_diss/37.

Council of Science Editors:

Vu CT. Distributed Energy-Efficient Solutions for Area Coverage Problems in Wireless Sensor Networks. [Doctoral Dissertation]. Georgia State University; 2009. Available from: https://scholarworks.gsu.edu/cs_diss/37

25. Palència Fernàndez, Laia. Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes.

Degree: Departament de Ciències Experimentals i de la Salut, 2012, Universitat Pompeu Fabra

URL: http://hdl.handle.net/10803/104154

► L'objectiu d'aquesta tesi era descriure les desigualtats en l'ús de diferents serveis sanitaris segons la posició socioeconòmica a Catalunya, Espanya i a Europa. A més… (more)

▼ L'objectiu d'aquesta tesi era descriure les desigualtats en l'ús de diferents serveis sanitaris segons la posició socioeconòmica a Catalunya, Espanya i a Europa. A més a més, es volia avaluar si la cobertura pública dels serveis, en particular la dels serveis dentals, infuencia la magnitud de les desigualtats socioeconòmiques en l'ús d'aquests serveis. Finalment, es va voler determinar la influència dels programes poblacionals de cribratge dels càncers de mama i cèrvix en la prevalença de cribratge i en la magnitud de les desigualtats. Per tal d'assolir aquests objectius es van dur a terme 4 estudis. Les fonts d'informació d'aquests estudis van ser, respectivament: diferents edicions de l'Enquesta de Salut de Catalunya (ESCA), diferents edicions de l'Enquesta Nacional de Salut d'Espanya (ENS), l'Enquesta de Salut, Envelliment i Jubilació a Europa (SHARE) 2006 i dades dels països europeus que van participar a l'Enquesta Mundial de la Salut de l'OMS l'any 2002. Els dos primers estudis eren estudis de tendències mentre que els dos últims van ser transversals. En tots els estudis les desigualtats socioeconòmiques es van mesurar mitjançant índexos relatius (RII) i absoluts (SII) de desigualtat. Els resultats d'aquests estudis mostren que a Catalunya i a Espanya els serveis d'atenció primària són equitatius o fins i tot les persones de classes manuals en presenten una major proporció d'ús. Tanmateix, hi ha marcades desigualtats en visites a l'especialista, en especial en les visites al dentista. Les desigualtats socioeconòmiques en la utilització dels serveis dentals existeixen a tota Europa, però són més grans en aquells països on l'atenció dental no està coberta pel sistema públic de salut que en aquells països on aquesta està parcialment coberta. A Europa, no es troben desigualtats socioeconòmiques en el cribratge dels càncers de mama i cèrvix en aquells països amb programes poblacionals de cribratge, però sí que es troben en aquells països amb programes pilot o regionals o amb només cribratge oportunista. Advisors/Committee Members: [email protected] (authoremail), true (authoremailshow), Borrell i Thió, Carme (director), true (authorsendemail).

Subjects/Keywords: Socioeconomic position; Inequalities; Health care utilisation; Trends; Dental health services; Public coverage; Early detection of cancer; Population-based programmes; Posició socio-econòmica; Desigualtats; Ús dels serveis sanitaris; Tendències; Serveis dentals; Cobertura Pública; Detecció precoç del cáncer; Programes poblacionals; 614

…coverage? (Under review in Community Dent. Oral Epidemiol.)… …coverage of dental services . . SEP inequalities in female cancer screening and influence of the… …countries have established nearly universal systems of health care coverage for their populations… …Hanratty et al. in systems with universal coverage [Hanratty et al., 2007], in most… …coverage exists, inequalities in access are lower, as has been found in a study comparing…

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APA (6^th Edition):

Palència Fernàndez, L. (2012). Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes. (Thesis). Universitat Pompeu Fabra. Retrieved from http://hdl.handle.net/10803/104154

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Palència Fernàndez, Laia. “Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes.” 2012. Thesis, Universitat Pompeu Fabra. Accessed March 03, 2021. http://hdl.handle.net/10803/104154.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Palència Fernàndez, Laia. “Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes.” 2012. Web. 03 Mar 2021.

Vancouver:

Palència Fernàndez L. Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes. [Internet] [Thesis]. Universitat Pompeu Fabra; 2012. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10803/104154.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Palència Fernàndez L. Socioeconomic inequalities in the use of health care services in Europe : the role of public coverage and population-based cancer screening programmes. [Thesis]. Universitat Pompeu Fabra; 2012. Available from: http://hdl.handle.net/10803/104154

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Campbell, Keith A. Low-cost error detection through high-level synthesis.

Degree: MS, Electrical & Computer Engineering, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/89068

► System-on-chip design is becoming increasingly complex as technology scaling enables more and more functionality on a chip. This scaling and complexity has resulted in a… (more)

▼ System-on-chip design is becoming increasingly complex as technology scaling enables more and more functionality on a chip. This scaling and complexity has resulted in a variety of reliability and validation challenges including logic bugs, hot spots, wear-out, and soft errors. To make matters worse, as we reach the limits of Dennard scaling, efforts to improve system performance and energy efficiency have resulted in the integration of a wide variety of complex hardware accelerators in SoCs. Thus the challenge is to design complex, custom hardware that is efficient, but also correct and reliable. High-level synthesis shows promise to address the problem of complex hardware design by providing a bridge from the high-productivity software domain to the hardware design process. Much research has been done on high-level synthesis efficiency optimizations. This thesis shows that high-level synthesis also has the power to address validation and reliability challenges through two solutions. One solution for circuit reliability is modulo-3 shadow datapaths: performing lightweight shadow computations in modulo-3 space for each main computation. We leverage the binding and scheduling flexibility of high-level synthesis to detect control errors through diverse binding and minimize area cost through intelligent checkpoint scheduling and modulo-3 reducer sharing. We introduce logic and dataflow optimizations to further reduce cost. We evaluated our technique with 12 high-level synthesis benchmarks from the arithmetic-oriented PolyBench benchmark suite using FPGA emulated netlist-level error injection. We observe coverages of 99.1% for stuck-at faults, 99.5% for soft errors, and 99.6% for timing errors with a 25.7% area cost and negligible performance impact. Leveraging a mean error detection latency of 12.75 cycles (4150x faster than end result check) for soft errors, we also explore a rollback recovery method with an additional area cost of 28.0%, observing a 175x increase in reliability against soft errors. Another solution for rapid post-silicon validation of accelerator designs is Hybrid Quick Error Detection (H-QED): inserting signature generation logic in a hardware design to create a heavily compressed signature stream that captures the internal behavior of the design at a fine temporal and spatial granularity for comparison with a reference set of signatures generated by high-level simulation to detect bugs. Using H-QED, we demonstrate an improvement in error detection latency (time elapsed from when a bug is activated to when it manifests as an observable failure) of two orders of magnitude and a threefold improvement in bug coverage compared to traditional post-silicon validation techniques. H-QED also uncovered previously unknown bugs in the CHStone benchmark suite, which is widely used by the HLS community. H-QED incurs less than 10% area overhead for the accelerator it validates with negligible performance impact, and we also introduce techniques to minimize any possible intrusiveness introduced by H-QED. Advisors/Committee Members: Chen, Deming (advisor).

Subjects/Keywords: High-level synthesis; Automation; error detection; scheduling; binding; compiler transformation; compiler optimization; pipelining; modulo arithmetic; logic optimization; state machine; datapath, control logic; shadow logic; low cost; high performance; electrical bugs; Aliasing; stuck-at faults; soft errors; timing errors; checkpointing; rollback; recovery; post-silicon validation; Accelerators; system on a chip; signature generation; execution signatures; execution hashing; logic bugs; nondeterministic bugs; masked errors; circuit reliability; hot spots; wear out; silent data corruption; observability; detection latency; mixed datapath; diversity; checkpoint corruption; error injection; error removal; Quick Error Detection (QED); Hybrid Quick Error Detection (H-QED); hybrid hardware/software; execution tracing; address conversion; undefined behavior; High-Level Synthesis (HLS) engine bugs; detection coverage

…detection latencies and high bug coverage, unlike tracing techniques that become ine↵ective for… …6. Unmasked error detection coverage of 99.42% for an assortment of three di↵erent kinds… …Instability CED Concurrent Error Detection CHStone C-based High-level Synthesis benchmark suite… …Error Detection, detecting errors by fine-grained duplication RISC Reduced Instruction Set… …Quick Error Detection (H-QED): Accelerator Validation and Debug using High-Level…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Campbell, K. A. (2015). Low-cost error detection through high-level synthesis. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/89068

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Campbell, Keith A. “Low-cost error detection through high-level synthesis.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed March 03, 2021. http://hdl.handle.net/2142/89068.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Campbell, Keith A. “Low-cost error detection through high-level synthesis.” 2015. Web. 03 Mar 2021.

Vancouver:

Campbell KA. Low-cost error detection through high-level synthesis. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/2142/89068.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Campbell KA. Low-cost error detection through high-level synthesis. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/89068

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

27. Campbell, Keith A. Robust and reliable hardware accelerator design through high-level synthesis.

Degree: PhD, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/99294

► System-on-chip design is becoming increasingly complex as technology scaling enables more and more functionality on a chip. This scaling-driven complexity has resulted in a variety… (more)

▼ System-on-chip design is becoming increasingly complex as technology scaling enables more and more functionality on a chip. This scaling-driven complexity has resulted in a variety of reliability and validation challenges including logic bugs, hot spots, wear-out, and soft errors. To make matters worse, as we reach the limits of Dennard scaling, efforts to improve system performance and energy efficiency have resulted in the integration of a wide variety of complex hardware accelerators in SoCs. Thus the challenge is to design complex, custom hardware that is efficient, but also correct and reliable. High-level synthesis shows promise to address the problem of complex hardware design by providing a bridge from the high-productivity software domain to the hardware design process. Much research has been done on high-level synthesis efficiency optimizations. This dissertation shows that high-level synthesis also has the power to address validation and reliability challenges through three automated solutions targeting three key stages in the hardware design and use cycle: pre-silicon debugging, post-silicon validation, and post-deployment error detection. Our solution for rapid pre-silicon debugging of accelerator designs is hybrid tracing: comparing a datapath-level trace of hardware execution with a reference software implementation at a fine temporal and spatial granularity to detect logic bugs. An integrated backtrace process delivers source-code meaning to the hardware designer, pinpointing the location of bug activation and providing a strong hint for potential bug fixes. Experimental results show that we are able to detect and aid in localization of logic bugs from both C/C++ specifications as well as the high-level synthesis engine itself. A variation of this solution tailored for rapid post-silicon validation of accelerator designs is hybrid hashing: inserting signature generation logic in a hardware design to create a heavily compressed signature stream that captures the internal behavior of the design at a fine temporal and spatial granularity for comparison with a reference set of signatures generated by high-level simulation to detect bugs. Using hybrid hashing, we demonstrate an improvement in error detection latency (time elapsed from when a bug is activated to when it manifests as an observable failure) of two orders of magnitude and a threefold improvement in bug coverage compared to traditional post-silicon validation techniques. Hybrid hashing also uncovered previously unknown bugs in the CHStone benchmark suite, which is widely used by the HLS community. Hybrid hashing incurs less than 10% area overhead for the accelerator it validates with negligible performance impact, and we also introduce techniques to minimize any possible intrusiveness introduced by hybrid hashing. Finally, our solution for post-deployment error detection is modulo-3 shadow datapaths: performing lightweight shadow computations in modulo-3 space for each main computation. We leverage the binding and scheduling… Advisors/Committee Members: Chen, Deming (advisor), Chen, Deming (Committee Chair), Hwu, Wen-Mei W (committee member), Wong, Martin D F (committee member), Kim, Nam Sung (committee member).

Subjects/Keywords: High-level synthesis (HLS); Automation; Error detection; Scheduling; Binding; Compiler transformation; Compiler optimization; Pipelining; Modulo arithmetic; Modulo-3; Logic optimization; State machine; Datapath; Control logic; Shadow datapath; Modulo datapath; Low cost; High performance; Electrical bug; Aliasing; Stuck-at fault; Soft error; Timing error; Checkpointing; Rollback; Recovery; Pre-silicon validation; Post-silicon validation; Pre-silicon debug; Post-silicon debug; Accelerator; System on a chip; Signature generation; Execution signature; Execution hash; Logic bug; Nondeterministic bug; Masked error; Circuit reliability; Hot spot; Wear out; Silent data corruption; Observability; Detection latency; Mixed datapath; Diversity; Checkpoint corruption; Error injection; Error removal; Quick Error Detection (QED); Hybrid Quick Error Detection (H-QED); Instrumentation; Hybrid co-simulation; Hardware/software; Integration testing; Hybrid tracing; Hybrid hashing; Source-code localization; Software debugging tool; Valgrind; Clang sanitizer; Clang static analyzer; Cppcheck; Root cause analysis; Execution tracing; Realtime error detection; Simulation trigger; Nonintrusive; Address conversion; Undefined behavior; High-level synthesis (HLS) bug; Detection coverage; Gate-level architecture; Mersenne modulus; Full adder; Half adder; Quarter adder; Wraparound; Modulo reducer; Modulo adder; Modulo multiplier; Modulo comparator; Cross-layer; Algorithm; Instruction; Architecture; Logic synthesis; Physical design; Algorithm-based fault tolerance (ABFT); Error detection by duplicated instructions (EDDI); Parity; Flip-flop hardening; Layout design through error-aware transistor positioning dual interlocked storage cell (LEAP-DICE); Cost-effective; Place-and-route; Field programmable gate array (FPGA) emulation; Application specific integrated circuit (ASIC); Field programmable gate array (FPGA); Energy; Area; Latency

…assertions. 4. Hybrid hashing enables very short error detection latencies and high bug coverage… …detection latencies and coverage of logic and electrical bugs inside hardware accelerators. H-QED… …12 12 14 17 CHAPTER 3 RELATED WORK . . 3.1 Hybrid Quick Error Detection 3.2 Modulo Shadow… …19 19 21 23 CHAPTER 4 HYBRID QUICK ERROR DETECTION 4.1 Basic Principles… …Real-time Error Detection . . . . . . . 6.5 Experimental Results . . . . . . . . . . vii…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Campbell, K. A. (2017). Robust and reliable hardware accelerator design through high-level synthesis. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99294

Chicago Manual of Style (16^th Edition):

Campbell, Keith A. “Robust and reliable hardware accelerator design through high-level synthesis.” 2017. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 03, 2021. http://hdl.handle.net/2142/99294.

MLA Handbook (7^th Edition):

Campbell, Keith A. “Robust and reliable hardware accelerator design through high-level synthesis.” 2017. Web. 03 Mar 2021.

Vancouver:

Campbell KA. Robust and reliable hardware accelerator design through high-level synthesis. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/2142/99294.

Council of Science Editors:

Campbell KA. Robust and reliable hardware accelerator design through high-level synthesis. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99294

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Open Access Theses and Dissertations