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1
Banerji, Ashok Kumar. "Designing electronic performance support systems." Thesis, Teesside University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239942.
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Banerji, (Bandyopadhyay) Ashok Kumar. "Designing electronic performance support systems." Boston Spa, United Kindom : British Library Document Supply Centre, 1995. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.239942.
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Campbell, Alistair B. "Performance enhancement of the task assessment process through the application of an electronic performance support system." Connect to thesis, 2008. http://portal.ecu.edu.au/adt-public/adt-ECU2008.0008.html.
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Sperano, Patricia M. "The Development of an Intranet-based Electronic Performance Support System for Knowledge Management Workers." NSUWorks, 2001. http://nsuworks.nova.edu/gscis_etd/857.
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This project was designed to explore the definition, design, and development of an intranet-based, electronic performance support system (EPSS) to provide knowledge workers with access to knowledge management resident on the World Wide Web (WWW). Knowledge management is a new field emerging at the confluence of organizational theory, management strategy, and management information systems. This field is emerging in a highly competitive, global environment where knowledge is perishable. It is also an environment where information is abundant via the WWW. Organizations have made significant investments in information technology and information technology-based solutions to remain competitive in this environment. Today's knowledge worker or participant in the knowledge management environment lacks the time, skills and knowledge to explore and exploit the online resources available through the WWW. The use of an intranet as EPSS is a relatively new concept. This project reviewed the concepts of knowledge, knowledge management, knowledge workers, intellectual assets and capital, and learning organizations, as well as the use of EPSS and intranets. An intranet-based, EPSS, code named eTools, was developed as a pilot for knowledge workers in the Options by IBM organization located in Research Triangle Park, North Carolina. An evaluation was completed to determine if the eTools project met the needs of the target population of knowledge workers. The evaluation found that the target population frequently used the WWW, with a majority of the population using accessing the Internet at least once a day. Usage of the intranet site was lower, in the range of less than once a week; however, the users responded that an intranet was the best method to communicate the project content. Based on the criteria set by the sponsoring management team and the evaluation results, the study found that the information and knowledge requirements of the Options by IBM knowledge workers were satisfactorily met utilizing through the eTools pilot.
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Hietpas, Jill S. "Evaluation of the electronic performance support system (EPSS) for the training department at Company A." Online version, 2003. http://www.uwstout.edu/lib/thesis/2003/2003hietpasj.pdf.
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Platt, Jeffrey Lynn. "The efficacy of an electronic performance support system as a training tool for online faculty." [Ames, Iowa : Iowa State University], 2008.
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Bork-Ceszlak, Krzysztof, and Tadeusz Żydanowicz. "Multisensory Expert-Based Support System for the Firefighter’s Training Performance Evaluation." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17137.
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The primary purpose of this thesis work is to design and implement a system supporting the fire-fighter’straining evaluation. The solution presented in this report comprises a real-time locating system andInertial Measurement Unit that collect the training data and an application built with the Unity3D gameengine used for processing. Before the presented application can process any data, a training facility must be recreated, and atrainer or an expert must define training guidelines, such as zones that a trainee must visit, objectshe/she has to see, and the required execution time. After this preparation and completed trainingsession, collected data is processed and the visualization together with evaluation process begins. Theprogram visualizes trainee’s position and his/her field of view and evaluates his performance. For thelatter, it uses the Unity3D collision detection feature. After the evaluation, the trainer can see detailedresults with recorded time stamps, and using them, he/she can fast forward to specific, important points,reducing the time to analyze trainee’s performance throughout the whole training. Tests which the authors conducted confirm that the built system meets requirements and is useful forevaluation of the trainee’s performance.
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Yakin, Ilker. "The Design, Development And Evaluation Of An Electronic Performance Support System (epss) For The Crime Scene Investigation Unit." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615307/index.pdf.
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The purpose of this study is to design, develop and evaluate an electronic performance support system (EPSS) for the crime scene investigation unit (CSI). For this purpose, a sequential explanatory strategy as a procedure of the mixed method design was used in analysis and evaluation of the EPSS. The research was composed of three main phases: analysisdesign, development and implementation, and evaluation of the EPSS. In first phase composed of performance and cause analyses, the CSI Unit&rsquo
s existing information, and contributing causal performance factors based on Gilbert&rsquo
Behavior Engineering Model were explored. In performance analysis phase, official documentation of the CSI Unit was reviewed. As for cause analysis, the survey and focus group interviews were conducted to 1176 and 22 CSI officers, respectively. These data were analyzed using with both quantitative and qualitative methods to facilitate the selection of the most appropriate intervention and its components. Analyses results revealed that 14 basic influences grouped under the workplace and competency on human behavior impacted performance of the officers. Based on these results, an EPSS composed of intrinsic, extrinsic and external levels, and support components was designed and developed in the second phase. Having been implemented, the evaluation of the EPSS based on the Kirkpatrick&rsquo
Four Levels of Evaluation Model was conducted v to determine the overall impact, perceived benefits, and effectiveness of the intervention in third phase. In this phase, a survey, interviews, computer logs and a checklist were used so as to assess the accomplishment of the EPSS. While the survey and the checklist were administered to the 191 officers and 2 experts from the field, the interviews were conducted with 12 officers. Evaluation results admitted that the CSI officers&rsquo
reactions were very positive to the EPSS. While, an intrinsic support made a major contribution to their productivity, establishing standardization would be perceived as the major impact of the EPSS. Lastly, increasing identity and simplifying criminal justice system were the two main impact factors on the society that the system would influence positively.
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Ayoub, Judith Lorene 1941. "The effect of classroom use of an electronic group support system on student critical thinking, performance and satisfaction." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288701.
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The use of an Interactive Computer Classroom (ICC) as compared to a traditional lecture format (LEC) for a nursing management course taught during the fall semester 1996 was examined in this study. The ICC was structured around Group Systems Support software, a tool previously used in business settings for group decision-making activities. The outcomes included critical thinking, measured by written responses completed at the end of each class and by scores from the California Critical Thinking Skills Test; academic performance, measured by the management course's midterm grades; and student satisfaction, measured by attendance and course evaluations. To consider generalizability of performance, the midterm examination scores of a concurrent nursing course were also measured. The management course midterm scores of the ICC group were significantly higher than those of the LEC group. The response to the open-ended-questions of the student evaluations indicated strong support of the participation made available by the computer activities but frustration with the computer hardware and software. Further evidence supporting student satisfaction was that six students requested to be transferred to the ICC group when the study was completed at mid-semester, while no students chose to move to the LEC group. There were no significant differences in scores for the California Critical Thinking Skills Test, the midterms grades for a concurrent nursing course, and class attendance.
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Yan, Chenyu. "Architectural support for improving security and performance of memory sub-systems." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26663.
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Thesis (Ph.D)--Computing, Georgia Institute of Technology, 2009.Committee Chair: Milos Prvulovic; Committee Member: Gabriel Loh; Committee Member: Hyesoon Kim; Committee Member: Umakishore Ramachandran; Committee Member: Yan Solihin. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Bowden, Todd H. "Design and Development of an Electronic Performance Enhancement Tool for Creating and Maintaining Information Management Web Sites." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77315.
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This study explored the design and development of an electronic performance enhancement tool that can assist a person with limited programming skills to create a variety of simple customized information management websites. In particular, this study was modeled after needs within an Instruction Technology department in which individuals were able to create pre-functional web pages with various elements such as textboxes and dropdown menus but lacked the programming skills necessary to add functionality to these web forms. Skilled programmers could add functionality to these pre-functioning web forms or create customized information management websites from scratch. However, programmers are not always available when needed. At the time of this study, there was no readily available way for persons to create customized information management websites without the services of a programmer or without needing to learn programming skills themselves. This study sought to determine what functionalities, characteristics and capabilities could be included in an electronic performance enhancement tool to assist non-programmers to create simple customized information management websites and how a tool with such functionalities, characteristics and capabilities could be designed and developed. A prototype version of such tool (named the Form And DataBase Interaction Tool or "FADBIT") was designed and developed in this study. This tool asks users who have created simple pre-functional web forms to answer a series of questions related to those webforms. Given the user's responses to these questions, this tool is able to form a metalanguage representation of the user's intentions for the web form and can translate this representation into useful programming code to add the desired functionality. The tool was successfully designed and developed using a generalized modular framework, and a Create-Adapt-Generalize model, with each module addressing one or more patterns common to web programming. The prototype tool successfully allowed non-programmers to create functional information websites for two structured evaluation projects, and achieved some level of success and encountered some difficulties with an unstructured project. Proposed modifications and extensions to the tool to address the difficulties encountered are presented.Ph. D.
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Luiro, V. (Vesa). "Acquisition and analysis of performance data for mobile devices." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514271319.
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Abstract
Electronic industry is developing advanced and versatile products to satisfy customers' needs. It is also creating new needs, which expand the market further. This highly competitive field forces companies to produce continuously better, and hence more complex, products at an increasingly fast rate. This is particularly true of the mobile phone industry, which pursues higher volumes and penetration rates throughout the world. Very high volumes and extreme complexity require intensive research and a commitment to high product quality. Mobile phone manufacturers must commit themselves to strict quality standards and programs, which ultimately enable high customer satisfaction.
Both quality assessment and product management generally need a method of feedback to be able to react to the manufactured output. This thesis concentrates on this aspect of feedback. A preliminary customer survey revealed that the information received directly from customers
might not be accurate enough to be used as primary feedback data. The quality of the information varies notably and depends entirely on the customers' ability to perceive the relevant parameters. This also affects greatly their ability to communicate the information to the customer interface and then all the way back to the manufacturer. Based on the findings, end customers' average level of knowledge of mobile phone technology is fair [C]. Therefore, it is recommended that more accurate means should be developed for acquiring feedback data. Also, based on other research findings, it would be important to minimize human intervention and to make the flow of information as direct as possible.
Based on previous research and the present findings, a concept was designed which satisfies the specific need for accurate feedback from the performance of mobile phones in the field. The interfaces providing data throughout the whole product life cycle were also analyzed in detail. And finally, the concept was implemented and piloted with a mobile phone manufacturer. The pilot studies showed that an improved feedback capability would benefit not only product quality, but also various functions of the company producing mobile devices. The increased knowledge of device performance obtained from the system can be utilized in, for example, testing, design, marketing, and management and also at all customer interfaces in the field.
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Koziel, Sylvie Evelyne. "From data collection to electric grid performance : How can data analytics support asset management decisions for an efficient transition toward smart grids?" Licentiate thesis, KTH, Elektroteknisk teori och konstruktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292323.
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Physical asset management in the electric power sector encompasses the scheduling of the maintenance and replacement of grid components, as well as decisions about investments in new components. Data plays a crucial role in these decisions. The importance of data is increasing with the transformation of the power system and its evolution toward smart grids. This thesis deals with questions related to data management as a way to improve the performance of asset management decisions. Data management is defined as the collection, processing, and storage of data. Here, the focus is on the collection and processing of data. First, the influence of data on the decisions related to assets is explored. In particular, the impacts of data quality on the replacement time of a generic component (a line for example) are quantified using a scenario approach, and failure modeling. In fact, decisions based on data of poor quality are most likely not optimal. In this case, faulty data related to the age of the component leads to a non-optimal scheduling of component replacement. The corresponding costs are calculated for different levels of data quality. A framework has been developed to evaluate the amount of investment needed into data quality improvement, and its profitability. Then, the ways to use available data efficiently are investigated. Especially, the possibility to use machine learning algorithms on real-world datasets is examined. New approaches are developed to use only available data for component ranking and failure prediction, which are two important concepts often used to prioritize components and schedule maintenance and replacement. A large part of the scientific literature assumes that the future of smart grids lies in big data collection, and in developing algorithms to process huge amounts of data. On the contrary, this work contributes to show how automatization and machine learning techniques can actually be used to reduce the need to collect huge amount of data, by using the available data more efficiently. One major challenge is the trade-offs needed between precision of modeling results, and costs of data management.QC 20210330
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Rawls, Charles. "PERFORMANCE SUPPORT AND USABILITY:AN EXPERIMENTAL STUDY OFELECTRONIC PERFORMANCE SUPPORT INTERFACES." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4175.
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This study evaluated the usability of two types of performance-support interfaces that were designed using informational and experiential approaches. The experiment sought to determine whether there is a relationship between usability and the informational and experiential approaches. The general population under study was undergraduate education major students from the University of Central Florida. From the general population of three educational technology instructor-led classes, 83 students were solicited to participate in the study by completing a class activity. From the general population, a total of 63 students participated in the study. By participating in the study, the students completed a task and a questionnaire. Students were predominantly English-speaking Caucasian female education majors between the ages of 19 and 20; most of them were sophomores or juniors working part time. They possessed moderately low to high computer skills and most considered themselves to have intermediate or expert Internet skills. An experimental posttest-only comparison group research design was used to test the hypotheses posited for this study. The participants were randomly assigned to either the informational interface group (X1) or the experiential interface group (X2), and the experiment was conducted electronically via a Web-based Content Management System (CMS). The observed data consisted of five outcome measures: efficiency, errors, intuitiveness, satisfaction, and student performance. Two instruments--a checklist and an online usability questionnaire--were used to measure the five dependent variables: efficiency, intuitiveness, errors, satisfaction, and student performance. The CMS was used as the vehicle to distribute and randomize the two interfaces, obtain informed consent, distribute the instructions, distribute the online questionnaire, and collect data. First, a checklist was used to assess the students' performance completing their task, which was a copyright issue request letter. The checklist was designed as a performance criterion tool for the researcher, instructor, and participants to use. The researcher and instructor constructed the checklist to grade copyright request letters and determine students' performance. The participants had the opportunity to use the checklist as a performance criterion to create the task document (copyright request letter). The checklist consisted of ten basic yet critical sections of a successful copyright request letter. Second, an online usability questionnaire was constructed based on the Purdue Usability Testing Questionnaire (PUTQ) questions to measure interface efficiency, intuitiveness, errors, and satisfaction. While these test items have been deemed important for testing the usability of a particular system, for purposes of this study, test items were modified, deleted, and added to ensure content validity. The new survey, University of Central Florida Usability Questionnaire (UCFUQ), consisting of 20 items, was implemented in a pilot study to ensure reliability and content validity. Changes to the PUTQ were modified to fulfill a blueprint. A pilot study of the instrument yielded a reliability coefficient of .9450, and the final online usability instrument yielded a reliability coefficient of .9321. This study tested two approaches to user interface design for the Electronic Performance Support (EPS) using two HTML interface templates and the information from an existing training module. There were two interventions consisting of two interface types: informational and experiential. The SPSS Graduate Pack 10.0 for Windows was used for data analysis and statistical reporting in this study. A t test was conducted to determine if a difference existed between the two interface means. ANOVA was conducted to determine if there was an interaction between the interface group means and the demographic data factored among the five dependent variables. Results of this study indicated that students at the University of Central Florida reported no differences between the two interface types. It was postulated that the informational interface would yield a higher mean score because of its implementation of HCI guidelines, conventions, and standards. However, it was concluded that the informational interface may not be a more usable interface. Users may be as inclined to use the experiential interface as the informational interface.Ed.D.
Department of Educational Research, Technology and Leadership
Education
Curriculum and Instruction
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Qin, Yang. "Performance of network coded systems supported by automatic repeat request." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/336231/.
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Inspired by the network information theory, network coding was invented in 2000. Since then, the theory and application of network coding have received intensive research and various network coding schemes have been proposed and studied. It has been demonstrated that the packetlevel network coding has the potential to outperform the traditional routing strategies in packet networks. By taking the advantages of the information carried by the packets sent to different receivers (sinks) in a packet network, packet-level network coding is capable of reducing the number of packets transmitted over the network. Therefore, the packet-level network coding employs the potential for boosting the throughput of packet networks. By contrast, the symbollevel network coding, which is also referred to as the physical-layer network coding, is capable of exploiting interference instead of avoiding it for improving the channel capacity and/or enhancing the reliability of communications. In this thesis, our focus is on the packet-level network coding. Performance of communication systems with network coding has been widely investigated from different perspectives, mainly under the assumption that packets are reliably transmitted over networks without errors. However, in practical communication networks, transmission errors always occur and error-detection or error-correction techniques are required in order to ensure reliable communications. Therefore, in this report, we focus our attention mainly on studying the performance of the communication networks with packet-level network coding, where Automatic Retransmission reQuest (ARQ) schemes are employed for error protection. Three typical ARQ schemes are invoked in our research, which are the Stop-and-Wait ARQ (SW-ARQ), Go-Back-N ARQ (GBN-ARQ) and the Selective-Repeat ARQ (SR-ARQ). Our main concern is the impact of network coding on the throughput performance of network coding nodes or networks containing network coding nodes. Additionally, the impact of network coding on the delay performance of network coding nodes or coded networks is also addressed. In a little more detail, in Chapter 3 of the thesis, we investigate the performance of the netvi works employing packet-level network coding, when assuming that transmission from one node to another is not ideal and that a certain ARQ scheme is employed for error-control. Specifically, the delay characteristics of general network coding node are first analyzed. Our studies show that, when a coding node invokes more incoming links, the average delay for successfully forming coded packets increases. Then, the delay performance of the Butterfly networks is investigated, which shows that the delay generated by a Butterfly network is dominated by the communication path containing the network coding node. Finally, the performance of the Butterfly network is investigated by simulation approaches, when the Butterfly network employs SW-ARQ, GBN-ARQ, or SR-ARQ for error-control. The achievable throughput, the average delay as well as the standard deviation of the delay are considered. Our performance results show that, when given a packet error rate Packet Error Rate (PER), the SR-ARQ scheme is capable of attaining the highest throughput and resulting in the lowest delay among these three ARQ schemes. In Chapter 4, the steady-state throughput of general network coding nodes is investigated, when the SW-ARQ scheme is employed. We start with considering a Two-Input-Single-Output (2ISO) network coding node without queueing buffers. Expressions for computing the steady-state throughput is derived. Then, we extend our analysis to the general H-Input-Single-Output (HISO) network coding nodes without queueing buffers. Finally, our analytical approaches are further extended to the HISO network coding nodes with queueing buffers. A range of expressions for evaluating the steady-state throughput are obtained. The throughout performance of the HISO network coding nodes is investigated by both analytical and simulation approaches. Our studies in this chapter show that the throughput of a network coding node decreases, as the number of its incoming links increases. This property implies that, in a network coding system, the coding nodes may form the bottlenecks for information delivery. Furthermore, the studies show that adding buffers to the network coding node may improve the throughput performance of a network coding system. Then, in Chapters 5 and 6, we investigate the steady-state throughput performance of the general network coding nodes, when the GBN-ARQ in Chapter 5 or the SR-ARQ in Chapter 6 is employed. Again, analytical approaches for evaluating the steady-state throughput of the general network coding nodes are concerned and a range of analytical results are obtained. Furthermore, the throughput performance of the network coding nodes supported by the GBN-ARQ or SR-ARQ is investigated by both simulations and numerical approaches. Finally, in Chapter 7, the conclusions extracted from the research are summarized and the possible directions for future research are proposed.
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Kordale, Rammohan. "System support for scalable services." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/8246.
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Jury, Thomas W. "Electronic Performance Support for E-Learning Analysis and Design." NSUWorks, 2007. http://nsuworks.nova.edu/gscis_etd/621.
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Corporate instructional designers often follow an instructional systems design (ISD) process to plan, create, and implement training programs. Increased demand for elearning as a replacement or addition to classroom training means that, in the current corporate environment, instructional designers are called upon to produce a wide variety of instructional formats and have to make more decisions during the ISD process.
E-learning is evolving into a total performance improvement solution rather than simply as a means to delivering distance training and consequently, in an effort to achieve business goals, many corporations are turning to it as a cost effective way to deliver training and support to employees and customers. Corporate e-learning applications can incorporate knowledge management and electronic performance support as well as support for multiple formats of online learning, adding to the complexity of the instructional designer's job and the ISD process. While the ISD process is well documented and numerous operational models exist, instructional designers often have difficulty in its application given the complexity of an e-learning application.
The study analyzed the impact of an experimental electronic performance support system (EPSS) on the performance of e-learning instructional designers. An EPSS intended to provide assistance during the analysis and design stages of an e-learning project was created to aid corporate instructional designers make tradeoffs among time, cost, and quality of various analysis and design procedures and techniques. Formative reviews by instructional designers experienced in e-learning added to the validity of the contents of the EPSS. Summative evaluator’s pilot tested the EPSS by using it in conjunction with the analysis and design activities of three corporate e-learning projects. Evaluation results indicated that an instructional design EPSS can help designers sequence and prioritize tasks, allocate time and resources to task execution, and focus tasks on user performance and client goals.
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Vallée, Richard. "Performance evaluation of multimedia communications systems supported by IEEE 802.6 DQDB MAN." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5855.
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The work of this thesis is concerned about the performance evaluation of multimedia communications systems supported by IEEE 802.6 DQDB MAN (Distributed Queue Dual Buses Metropolitan Area Network). The proposed IEEE 802.6 DQDB MAN standard, more commonly called DQDB, defines a high speed network allowing integration of voice and data over circuit and packet switching networks. Such networks may be particularly useful for multimedia applications within medical environments involving the transfer of voice and high resolution images. Another application of DQDB can be a backbone network interconnecting low-speed LANs (local area networks). Simulation results, based on the development of queueing models by using the QNAP2 (Queue Network Analysis Package) simulation software, show that DQDB performs well in the above mentioned applications. However, since DQDB transfers information over short fixed-length slots, congestion problems related to the slot formatting process are observed under certain system configurations for multimedia applications. In order to reduce these congestion problems, two system improvements are proposed. The first is to consider the use of images compressed according to the technique called the reduced-difference pyramid while the second one is to allocate higher access priority to the gateways in the LANs interconnected by DQDB.
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Clarke, Michael. "Operating system support for emerging application domains." Thesis, Lancaster University, 2000. http://eprints.lancs.ac.uk/11800/.
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Parekh, Mitesh B. "Development of decision support system for reliability." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=1144.
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Banks, Harry G. III. "Considerations for the design and implementation of a management support system for the Electronic Warfare System Support Laboratory." Thesis, Berlin ; New York : Springer ; Chichester, UK : Praxis, 1985. http://hdl.handle.net/10945/21221.
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Agarwala, Sandip. "System Support for End-to-End Performance Management." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16171.
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This dissertation introduces, implements, and evaluates the novel concept of
"Service Paths", which are system-level abstractions that capture and describe
the dynamic dependencies between the different components of a distributed
enterprise application. Service paths are dynamic because they capture the
natural interactions between application services dynamically composed to offer
some desired end user functionality. Service paths are distributed because such
sets of services run on networked machines in distributed enterprise data
centers. Service paths cross multiple levels of abstraction because they link
end user application components like web browsers with system services like
http providing communications with embedded services like hardware-supported
data encryption. Service paths are system-level abstractions that are created
without end user, application, or middleware input, but despite these facts,
they are able to capture application-relevant performance metrics, including
end-to-end latencies for client requests and the contributions to these
latencies from application-level processes and from software/hardware resources
like protocol stacks or network devices.
Beyond conceiving of service paths and demonstrating their utility, this thesis
makes three concrete technical contributions. First, we propose a set of signal
analysis techniques called ``E2Eprof' that identify the service paths taken
by different request classes across a distributed IT infrastructure and
the time spent in each such path. It uses a novel algorithm called ``pathmap'
that computes the correlation between the message arrival and departure
timestamps at each participating node and detect dependencies among them. A
second contribution is a system-level monitoring toolkit called ``SysProf',
which captures monitoring information at different levels of granularity,
ranging from tracking the system-level activities triggered by a single system
call, to capturing the client-server interactions associated with a service
paths, to characterizing the server resources consumed by sets of clients or
client behaviors.
The third contribution of the thesis is a publish-subscribe based monitoring
data delivery framework called ``QMON'. QMON offers high levels of
predictability for service delivery and supports utility-aware monitoring
while also able to differentiate between different levels of service
for monitoring, corresponding to the different classes of SLAs maintained for
applications.
23
Mohd, Anuar Fatahiyah. "Trade mark similarity assessment support system." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/73369/.
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Trade marks are valuable intangible intellectual property (IP) assets with potentially high reputational value that can be protected. Similarity between trade marks may potentially lead to infringement. That similarity is normally assessed based on the visual, conceptual and phonetic aspects of the trade marks in question. Hence, this thesis addresses this issue by proposing a trade mark similarity assessment support system that uses the three main aspects of trade mark similarity as a mechanism to avoid future infringement. A conceptual model of the proposed trade mark similarity assessment support system is first proposed and developed based on the similarity assessment criteria outlined in a trade mark manual. The proposed model is the first contribution of this study, and it consists of visual, conceptual, phonetic and inference engine modules. The second contribution of this work is an algorithm that compares trade marks based on their visual similarity. The algorithm performs a similarity assessment using content-based image retrieval (CBIR) technology and an integrated visual descriptor derived using the low-level image feature, i.e. the shape feature. The performance of the algorithm is then assessed using information retrieval based measures. The obtained result demonstrates better retrieval performance in comparison to the state of the art algorithm. The conceptual aspect of trade mark similarity is then examined and analysed using a proposed algorithm that employs semantic technology in the conceptual module. This contribution enables the computation of the conceptual similarity between trade marks, with the utilisation of an external knowledge source in the form of a lexical ontology, together with natural language processing and set similarity theory. The proposed algorithm is evaluated using both information VI retrieval and human collective opinion measures. The retrieval result produced by the proposed algorithm outperforms the traditional string similarity comparison algorithm in both measures. The phonetic module examines the phonetic similarity of trade marks using another proposed algorithm that utilises phoneme analysis. This algorithm employs phonological features, which are extracted based on human speech articulation. In addition, the algorithm also provides a mechanism to compare the phonetic aspect of trade marks with typographic characters. The proposed algorithm is the fourth contribution of this study. It is evaluated using an information retrieval based measure. The result shows better retrieval performance in comparison to the traditional string similarity algorithm. The final contribution of this study is a methodology to aggregate the overall similarity score between trade marks. It is motivated by the understanding that trade mark similarity should be assessed holistically; that is, the visual, conceptual and phonetic aspects should be considered together. The proposed method is developed in the inference engine module; it utilises fuzzy logic for the inference process. A set of fuzzy rules, which consists of several membership functions, is also derived in this study based on the trade mark manual and a collection of trade mark disputed cases is analysed. The method is then evaluated using both information retrieval and human collective opinion. The proposed method improves the retrieval accuracy and the experiment also proves that the aggregated similarity score correlates well with the score produced from human collective opinion. The evaluations performed in the course of this study employ the following datasets: the MPEG-7 shape dataset, the MPEG-7 trade marks dataset, a collection of 1400 trade marks from real trade mark dispute cases, and a collection of 378,943 company names.
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Tahvili, Sahar. "A Decision Support System for Integration Test Selection." Licentiate thesis, Mälardalens högskola, Inbyggda system, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-33118.
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Software testing generally suffers from time and budget limitations. Indiscriminately executing all available test cases leads to sub-optimal exploitation of testing resources. Selecting too few test cases for execution on the other hand might leave a large number of faults undiscovered. Test case selection and prioritization techniques can lead to more efficient usage of testing resources and also early detection of faults. Test case selection addresses the problem of selecting a subset of an existing set of test cases, typically by discarding test cases that do not add any value in improving the quality of the software under test. Test case prioritization schedules test cases for execution in an order to increase their effectiveness at achieving some performance goals such as: earlier fault detection, optimal allocation of testing resources and reducing overall testing effort. In practice, prioritized selection of test cases requires the evaluation of different test case criteria, and therefore, this problem can be formulated as a multi-criteria decision making problem. As the number of decision criteria grows, application of a systematic decision making solution becomes a necessity. In this thesis, we propose a tool-supported framework using a decision support system, for prioritizing and selecting integration test cases in embedded system development. The framework provides a complete loop for selecting the best candidate test case for execution based on a finite set of criteria. The results of multiple case studies, done on a train control management subsystem from Bombardier Transportation AB in Sweden, demonstrate how our approach helps to select test cases in a systematic way. This can lead to early detection of faults while respecting various criteria. Also, we have evaluated a customized return on investment metric to quantify the economic benefits in optimizing system integration testing using our framework.
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Guedes, Neto Dorgival Olavo. "Operating system and network support for high-performance computing." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/298757.
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High-performance computing applications were once limited to isolated supercomputers. In the past few years, however, there has been an increasing need to share data between different machines. This, combined with new network technologies which provide higher bandwidths, have led high-performance computing systems to adapt so that they can move data over the local network. There are some problems in doing this. Current high-performance systems often use centralized protocol servers, thereby creating bottlenecks to network connections. In addition, the lack of a more appropriate protocol leads to the use of TCP by applications using parallel connections. TCP is not perfectly tuned to such applications. This dissertation presents a detailed analysis of the problems caused by centralized protocol servers and the use of TCP in high-performance computing environments. It shows why the network servers currently available in some supercomputers do not provide good performance. It also presents simulation results that illustrate how TCP connection performance can degrade rapidly when multiple cooperative connections are used. The main contributions in this work are the development of distributed protocol stacks and cooperative rate-based traffic shaping. Distributed stacks use an user-level protocol implementation to replicate the TCP/IP protocol stack in all the nodes of a multicomputer, removing the protocol server from the data path and avoiding the associated bottleneck. Cooperative rate shaping uses bandwidth estimates to pace data packets, avoiding most of the problems that cause performance degradation in parallel cooperative connections. It also provides a way for cooperating connections to share their bandwidth estimates, improving performance by making good use of their combined knowledge.
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Liu, Xia M. Eng Massachusetts Institute of Technology. "Improving driving training with a handheld performance support system." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45976.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.Includes bibliographical references (p. [39]).
The handheld computer Driver Trainer application is an element of a new training program by the transportation company to improve the safety of new truck drivers. Its aim is to aid trainers objectively evaluate truck drivers in the on-the-road driving portion of the newly planned training centers using the custom handheld device. The application will automate part of the evaluation process by using Telematics data to find driver mistakes, and to simplify the recording process for non-telematics related incidents. This thesis discusses the design of the support system and the interface of the handheld computer application.
by Xia Liu.
M.Eng.
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Fröberg, Joakim. "Engineering Automotive Electronic Systems: Decision Support for Successful Integration." Doctoral thesis, Mälardalen University, Department of Computer Science and Electronics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-459.
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The electronic system of a modern vehicle is essential to achieve a successful automotive product. Vehicle development is performed by integrating components that include embedded electronics from several suppliers.
This thesis present results on the subject of integration of automotive electronic systems. Our studies aim at providing knowledge on how to integrate automotive electronic systems successfully in a setting where vehicles are developed based on existing platforms. We focus on early phases of automotive electronic system development and in particular on the decisions taken in integration of electronic sub-systems. The contribution is the presented support for making decisions to successfully integrate electronic systems for modern vehicles. The contribution includes an overview of driving factors of automotive electronics system design, a validated set of success practices for the integration of electronic components, and the proposal and demonstration of a decision model. The influential factors and the validated set of practices stems from case studies of products and projects while the proposed decision model is a result of combining two general models for architecture analysis and decision making, ATAM and AHP.
We demonstrate that choices in strategy and design preceding integration are central to achieve a successful integration. Our studies show that problems arise from omitted strategy decisions and we provide a checklist for decision making in the areas; functionality, platform, integration design, and assigning responsibilities. We provide a recommendation that we validate in a multiple cases study where fulfillment of recommendations is demonstrated to affect project success in integration projects.
The potential gain for OEMs using our results lies in achieving more solid foundations for design decisions. Designers and managers could potentially find central decisions on integration strategy early that, if omitted, could cause delays. Thus, applying the result could avoid pitfalls and enable successful integration projects.
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Chinpanich, Vorapong. "Helpdesk Support Alert System." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2674.
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The goal of this project was to implement the Helpdesk Support Alert System in the Data Center Services (DCS) of California State University, San Bernardino's (CSUSB's) Information Resource and Technology Division (IRT). DCS is responsible for ensuring uninterrupted operation of all CSUSB administrative computing systems. These responsibilities include user support, system maintenance, and system security. The DCS helpdesk cannot be staffed 24 hours a day; this application is designed to alert DCS technicians of emergencies when they are away from the helpdesk. The Helpdesk Support Alert System sends out an automated emergency alert in the form of a short text message to technicians' mobile phones. Technicians respond back to their main office by using the Wireless Application Protocol (WAP) capability of their mobile phones.
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Reed, Nicholas. "Development and evaluation of a design support system." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/271697/.
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This thesis presents the development and evaluation of a knowledge-based Design System. Despite the rise in Knowledge Management research and theories, there is insufficient evidence to conclude if Knowledge Management activities can increase business value. Furthermore, existing knowledge related research was found to insufficiently address the needs of Small to Medium Enterprises (SME). The research develops and demonstrates a suitable knowledge strategy for a design and manufacturing SME faced with a potentially critical knowledge loss from a retiring expert and constrained business growth. The pivotal component of the strategy was the establishment of a codified knowledge base or ‘Design System’, containing product knowledge, best practice guidelines and bespoke design tools to support design knowledge reuse. The system was successfully integrated into the business and a multifaceted evaluative approach applied in a longitudinal study. The evaluation analysed a series of facets including, user behaviour, case studies and financial data. The study found that the Design System led to an increase in business value and successfully protected against knowledge loss. The research therefore demonstrates a successful knowledge strategy that could be adopted by other SMEs and provides evidence of the benefit of knowledge-based systems in design and manufacturing.
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Cates, Shawn R. "Increasing Performance Support for International Missionary Training Centers." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3127.
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In 2011 the Missionary Department sponsored a development project focused on creating performance support tools for international missionary training centers (IMTCs). The purpose of the project was to determine an area where there was a gap between desired performance and actual performance for IMTC training managers and develop tools to support them in improving performance in the chosen area. The target area supported the IMTC training managers in helping part-time teachers improve their effectiveness. Two products were created to help managers work more effectively with their teachers and a third product is currently under development. The first was a teacher competency print resource that managers could use to guide their feedback and evaluations of teachers. The second was a set of standards and suggestions managers could implement to help teachers improve. The third was an electronic teacher-tracking tool that would allow managers to track the progress and goals of each teacher. The design model used was a combination of a rapid prototyping model, cascade design model, and an electronic performance support design model. It included four major iterations for the products. This paper discusses the various stages of the development process, including adjustments to the planned design model, prototypes, and finalized products.
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Kim, Yong Jin. "Measuring web-based business to business support system success based on user satisfaction." Full text available online (restricted access), 2002. http://images.lib.monash.edu.au/ts/theses/KimYJ.pdf.
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Harrichunder, Rajen. "A learning support system for the Visual Simulation Environment." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-02022010-020139/.
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SINGH, ARUN K. "ELECTRONIC SIMULATION IN CONSTRUCTION." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1014666670.
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Liu, Kung-Chao. "Information system development and the use of electronic meeting systems." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185439.
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Information system requirements determination is a key area in management information systems research that includes the problems of requirements specification, requirements elicitation, and user involvement. The combination of these three problems is a research area which we call the group approach to information system requirements determination. The main contribution of this research is a model to be used for the problem of fitting existing computer aids to this research area and a set of methods for solving the usability and configuration problems when using such computer aids. The usability problem is that of determining whether a set of computer aids can be used effectively in accomplishing the task of requirements determination. The configuration problem is that of selecting a minimum collection of funtionalities necessary for economically supporting all aspects of requirements determination. Electronic meeting systems are the general category of computer aids that we are interested in applying to the task. In particular, the GroupSystems electronic meeting system developed at The University of Arizona is used as a case in this research. Characteristics of the requirements determination task and profiles of GroupSystems tools are combined into our model for fitting computer aids to a given task. We then derive the answers regarding the usability and configuration of GroupSystems in the group approach to information system requirements determination. We also compare the derived configurations to the GroupSystems tools used in an authentic case. The main points of this research include: (1) proposal of the concept of fitting computer aids to, instead of developing new computer aids for, a task area; (2) proposal of a model for fitting computer aids via a classification of information types; (3) analysis of the natures of the fitting model and the usability and configuration problems; (4) proposal of approximation methods for solving the configuration problem; (5) analysis of the task area--the group approach to information system requirements determination; (6) analysis of the use of GroupSystems in the task area by applying the proposed fitting model and approximation methods; and (7) demonstration of the usefulness of the fitting model and approximation methods by analyzing an authentic case of using GroupSystems tools.
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Ornelas, Mário André Santos de. "Electronic sow feeding : making sense of feeding data to support sow management." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2021. http://hdl.handle.net/10400.5/21184.
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Dissertação de Mestrado Integrado em Medicina VeterináriaThis study aimed to address the knowledge gaps concerning how group-housed gestating sows interact with modern electronic sow feeding (ESF) stations and to explore the potential of data recorded by these systems to enhance farm management. ESF records of 276 sow-gestations, from a dynamic group of c. 120 individuals were investigated. Data was analysed to identify patterns in the use of feeding stations by animals, and associations between feeding patterns and reproductive performance. Throughout the approximate 15 weeks that each sow spent on the dry sow house during a gestation, the total number of visits to the feeding stations varied greatly among individuals (367.7 ± 282.8) most of which were non-feeding visits (60.01 ± 19.8%). Feeding activity was highly concentrated within the first 12 h of feeding cycles (23 h) and sows ate their daily rations predominantly on a single feeding station visit (98.3 ± 1.7%). A mixed effects model revealed a weak effect of time on the number of feeding station visits, and a negative relationship between parity and total number of visits (b = - 0.230, SE = 0.022, p < 0.001). Sows kept feeding order relatively stable across gestation, especially among those who fed first. Additionally, results suggested that with every additional parity, the odds of a sow being among the first 15% group members to feed increased by a factor of 2.16 [OR: 2.16, p<0.010]. Statistically significant associations were found between feeding patterns and pre weaning piglet mortality, but not with number of piglets born alive nor average birth weight. Median piglet mortality was lower for sows feeding last compared to those feeding first (4.5% vs 14.3%, p = 0.025) and with a middle position in the feeding order (4.5% vs 11.8%, p = 0.045). Individuals with a regular feeding time showed higher piglet mortality rates than those with moderately regular (14.3% vs 10.6%, p = 0.029) and irregular (14.3% vs 9.5%, p = 0.047) feeding times. Median piglet mortality was superior in fast feeding sows compared to those feeding slower (13.3% vs 9.1%, p = 0.053). This work enhances current understanding of how gestating sows interact with ESF stations and highlights the potential of ESF data to support sow management.
RESUMO - ALIMENTAÇÃO ELETRÓNICA DE PORCAS: UTILIZAÇÃO DOS SEUS REGISTOS COMO SUPORTE AO MANEIO DA PORCA REPRODUTORA - Em suinicultura, o sucesso dos sistemas produtivos é influenciado em larga escala pelo desempenho do efetivo reprodutor. O maneio alimentar assume, a esse respeito, um papel decisivo na performance reprodutiva a médio e longo prazos e deve ter presentes as diferentes necessidades de cada animal. A alimentação eletrónica permite que porcas gestantes sejam alimentadas de forma individual estando alojadas em grupos, conforme previsto na legislação europeia. Ao passo que a adoção deste sistema tem vindo a crescer ao longo dos anos, a valorização dos seus registos tem recebido pouca atenção. Não obstante, alguns estudos sugerem que a informação recolhida automaticamente pelas estações de alimentação eletrónica (EAE) pode constituir uma ferramenta de monitorização, capaz de fomentar o maneio individual da porca gestante. Este trabalho visa enriquecer a compreensão do modo como as porcas em gestação em grupo interagem com EAE e avaliar a utilidade dos registos gerados por este sistema para apoiar o maneio da porca reprodutora. Para o efeito, analisaram-se registos de 276 gestações pertencentes a um grupo dinâmico de cerca de 120 porcas com acesso a duas EAE. A análise focou-se na identificação de padrões de utilização das EAE e no estudo de relações entre padrões de alimentação e performance reprodutiva. ...
N/A
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Celik, Basak. "Development Of A Decision Support System For Performance-based Landfill Design." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609501/index.pdf.
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Performance-based landfill design approach is a relatively new design approach adopted recently in solid waste management and applied in USA, European Union countries and some developing-economy countries like South Africa. This approach rejects the strict design criteria and accommodates a design that selects the most appropriate design components of a landfill (final cover, bottom liner, and leachate collection system) and their design details to result in the best overall performance with respect to performance criteria (groundwater contamination and stability) considering the system variables (climatic conditions of the site, site hydrogeology, and size of the landfill). These design components, performance criteria and design variables involved in decision process make performance-based landfill design a complex environmental problem. Decision support systems (DSS) are among the most promising approaches to confront this complexity. The fact that different tools can be integrated under different architectures confers DSSs ability to confront complex problems, and capability to support decision-making processes. In this thesis study, a DSS to aid in the selection of design components considering the design variables and performance criteria for performance-based landfill design was developed. System simulation models and calculation modules were integrated under a unique DSS architecture. A decision support framework composed of preliminary design and detailed design phases were developed. The decision of appropriate design components leading to desired performance was made based on stability issues and vulnerability of groundwater, using knowledge gathered from DSS. Capabilities and use of the developed DSS were demonstrated by one real and one hypothetical landfill case studies.
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Xu, Jie. "Fault-tolerant software : dependability/performance trade-offs, concurrency and system support." Thesis, University of Newcastle Upon Tyne, 1999. http://hdl.handle.net/10443/1995.
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As the use of computer systems becomes more and more widespread in applications that demand high levels of dependability, these applications themselves are growing in complexity in a rapid rate, especially in the areas that require concurrent and distributed computing. Such complex systems are very prone to faults and errors. No matter how rigorously fault avoidance and fault removal techniques are applied, software design faults often remain in systems when they are delivered to the customers. In fact, residual software faults are becoming the significant underlying cause of system failures and the lack of dependability. There is tremendous need for systematic techniques for building dependable software, including the fault tolerance techniques that ensure software-based systems to operate dependably even when potential faults are present. However, although there has been a large amount of research in the area of fault-tolerant software, existing techniques are not yet sufficiently mature as a practical engineering discipline for realistic applications. In particular, they are often inadequate when applied to highly concurrent and distributed software. This thesis develops new techniques for building fault-tolerant software, addresses the problem of achieving high levels of dependability in concurrent and distributed object systems, and studies system-level support for implementing dependable software. Two schemes are developed - the t/(n-l)-VP approach is aimed at increasing software reliability and controlling additional complexity, while the SCOP approach presents an adaptive way of dynamically adjusting software reliability and efficiency aspects. As a more general framework for constructing dependable concurrent and distributed software, the Coordinated Atomic (CA) Action scheme is examined thoroughly. Key properties of CA actions are formalized, conceptual model and mechanisms for handling application level exceptions are devised, and object-based diversity techniques are introduced to cope with potential software faults. These three schemes are evaluated analytically and validated by controlled experiments. System-level support is also addressed with a multi-level system architecture. An architectural pattern for implementing fault-tolerant objects is documented in detail to capture existing solutions and our previous experience. An industrial safety-critical application, the Fault-Tolerant Production Cell, is used as a case study to examine most of the concepts and techniques developed in this research.
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Diez, Rodrigo J. (Rodrigo Jesus). "High-performance electronic systems for complex LEO missions." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120897.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 79-81).
The space industry is experiencing rapid growth in small satellites and reusable launch vehicles. Constellations are in development to enable exciting new applications such as realtime video of the whole planet and broadband internet access provided through constellations of low Earth orbiting (LEO) satellites. Existing Earth observation applications focused on observation imagery, such as weather prediction and disaster relief planning, will have improvements in the quality of their products from increased the resolution of the instruments onboard the satellites and a reduction in the time between acquisitions by using large constellations of LEO small satellites. This increasing demand for performance despite the limited budget of commercial space companies will require solutions beyond the capabilities of current electronic space products. In response to the increasing need for onboard processing, Novo Space, a STAR graduate student startup founded by the author of this thesis, is developing affordable electronic components and systems for complex LEO missions that bridge the gap between the reliability of space-grade components and the performance of commercial off-the-shelf (COTS) parts. This thesis focuses on architectural designs for new space applications using Novo Space ecosystem of SpaceVPX products, the result of research and analysis to meet the new space needs for high-performance space electronics. In particular, we analyze three case studies: a payload subsystem, an avionics subsystem, and a subsystem combining both avionics and payload in the same box. With the aim of furthering our understanding of the SpaceVPX standard and its potential for future space applications, a final example of a laser communication system is analyzed in greater detail.
by Rodrigo J. Diez.
S.M. in Engineering and Management
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Tuna, Buket. "A web based IT support tracking system." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2542.
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This project proposes an automated system that allows a registered user to post questions to a web-based database of technical experts. This enables the user to have a quicker response time to their questions. The users questions and answers are posted to the website.
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Ren, Xianqiang. "Support-vector-machine based automatic performance modelling and optimisation for analogue and mixed-signal designs." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/64880/.
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The growing popularity of analogue and mixed-signal (AMS) ASIC and SoC designs for communication applications has led to an increasing requirement for high efficiency performance modelling and optimisation methodologies in AMS synthesis systems. Recently, the support vector machine (SVM) method has been introduced into this challenging field. This research has studied the application of SVMs to AMS performance modelling in terms of the computational cost and prediction accuracy. A novel, general performance modelling methodology which could be applied to an arbitrary AMS system has been developed and integrated into an AMS performance optimisation system. The contributions of this research can be summarised as follows: firstly, a new performance modelling methodology based on automatic generation of knowledge databases for AMS performance modelling using SVM techniques has been developed. Two performance model construction methods have been implemented: a linearly graded method and a support vector regression method. They can provide a basis for efficient design space exploration. Both methods construct performance models for AMS designs in a fully automatic way. A simulator, a performance extractor and an SVM trainer have been developed and integrated into a practical demonstrator system. Secondly, a knowledge-based AMS performance optimisation system has been developed for system-level and circuit-level designs. Knowledge data bases created using the proposed methodology are reusable. This has been verified by the application of two optimisation methods, a dedicated genetic optimisation algorithm and the standard pattern search technique. Finally, the proposed performance model construction methodology and the underlying performance optimisation system have been validated using two complex case studies. The first example is a high-level model of a mixed-signal sigma-delta modulator which comprises most of the practical design nonlinearities and imperfections that are known to affect the performance. The proposed method is able to find designs with significantly superior key performance figures compared to those obtained by the standard sigma-delta modulator design procedure. The second example is a radio frequency (RF) range Colpitts filter for silicon implementations. The non-standard structure of this filter with a lossy spiral inductor makes this type of circuit difficult to handle by standard filter synthesis methods. The proposed performance optimisation method has found solutions which satisfy performance requirements in cases where a standard manual filter design procedure failed.
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Judd, John David. "Stream splitting in support of intrusion detection." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FJudd.pdf.
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Lee, Dongwon. "High-performance computer system architectures for embedded computing." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42766.
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The main objective of this thesis is to propose new methods for designing high-performance embedded computer system architectures. To achieve the goal, three major components - multi-core processing elements (PEs), DRAM main memory systems, and on/off-chip interconnection networks - in multi-processor embedded systems are examined in each section respectively.
The first section of this thesis presents architectural enhancements to graphics processing units (GPUs), one of the multi- or many-core PEs, for improving performance of embedded applications. An embedded application is first mapped onto GPUs to explore the design space, and then architectural enhancements to existing GPUs are proposed for improving throughput of the embedded application.
The second section proposes high-performance buffer mapping methods, which exploit useful features of DRAM main memory systems, in DSP multi-processor systems. The memory wall problem becomes increasingly severe in multiprocessor environments because of communication and synchronization overheads. To alleviate the memory wall problem, this section exploits bank concurrency and page mode access of DRAM main memory systems for increasing the performance of multiprocessor DSP systems.
The final section presents a network-centric Turbo decoder and network-centric FFT processors. In the era of multi-processor systems, an interconnection network is another performance bottleneck. To handle heavy communication traffic, this section applies a crossbar switch - one of the indirect networks - to the parallel Turbo decoder, and applies a mesh topology to the parallel FFT processors. When designing the mesh FFT processors, a very different approach is taken to improve performance; an optical fiber is used as a new interconnection medium.
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Bennasar, Mohamed. "Clinical decision support system for early detection and diagnosis of dementia." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/73073/.
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Dementia is a syndrome caused by a chronic or progressive disease of the brain, which affects memory, orientation, thinking, calculation, learning ability and language. Until recently, early diagnosis of dementia was not a high priority, since the related diseases were considered untreatable and irreversible. However, more effective treatments are becoming available, which can slow the progress of dementia if they are used in the early stages of the disease. Therefore, early diagnosis is becoming more important. The Clock Drawing Test (CDT) and Mini Mental State Examination (MMSE) are well-known cognitive assessment tests. A known obstacle to the wider usage of the CDT assessments is the scoring and interpretation of the results. This thesis introduces a novel diagnostic Clinical Decision Support System (CDSS) based on CDT which can help in the diagnosis of three stages of dementia. It also introduces the advanced methods developed for the interpretation and analysis of CDTs. The data used in this research consist of 604 clock drawings produced by dementia patients and healthy individuals. A comprehensive catalogue of 47 visual features within CDT drawings is proposed to enhance the sensitivity of the CDT in diagnosing the early stages of dementia. These features are selected following a comprehensive analysis of the available data and the most common CDT scoring systems reported in the medical literature. These features are used to build a new digitised dataset necessary for training and validating the proposed CDSS. In this thesis, a novel feature selection method is proposed for the study of CDT feature significance and to define the most important features in diagnosing dementia. iii A new framework is also introduced to analyse the temporal changes in the CDT features corresponding to the progress of dementia over time, and to define the first onset symptoms. The proposed CDSS is designed to differentiate between four cognitive function statuses: (i) normal; (ii) mild cognitive impairment or mild dementia; (iii) moderate or severe dementia; and (vi) functional. This represents a new application of the CDT, as it was previously used only to detect the positive dementia cases. Diagnosing mild cognitive impairment or early stage dementia using CDT as a standalone tool is a very challenging task. To address this, a novel cascade classifier is proposed, which benefits from combining CDT and MMSE to enhance the overall performance of the system. The proposed CDSS diagnoses the CDT drawings and places them into one of three cognitive statuses (normal or functional, mild cognitive impairment or mild dementia, and moderate or severe dementia) with an accuracy of 78.34 %. Moreover, the proposed CDSS can distinguish between the normal and the abnormal cases with accuracy of 89.54 %. The achieved results are good and outperform most of CDT scoring systems in discriminating between normal and abnormal cases as reported in existing literature. Moreover, the system shows a good performance in diagnosing the CDT drawings into one of the three cognitive statuses, even comparing well with the performance of dementia specialists. The research has been granted ethical approval from the South East Wales Research Ethics Committee to employ anonymised copies of clock drawings and copies of Mini Mental State Examination made by patients during their examination by the memory team in Llandough hospital, Cardiff.
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Shahtaheri, Yasaman. "A Probabilistic Decision Support System for a Performance-Based Design of Infrastructures." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/96804.
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Infrastructures are the most fundamental facilities and systems serving the society. Due to the existence of infrastructures in economic, social, and environmental contexts, all lifecycle phases of such fundamental facilities should maximize utility for the designers, occupants, and the society. With respect to the nature of the decision problem, two main types of uncertainties may exist: 1) the aleatory uncertainty associated with the nature of the built environment (i.e., the economic, social, and environmental impacts of infrastructures must be described as probabilistic); and 2) the epistemic uncertainty associated with the lack of knowledge of decision maker utilities. Although a number of decision analysis models exist that consider the uncertainty associated with the nature of the built environment, they do not provide a systematic framework for including aleatory and epistemic uncertainties, and decision maker utilities in the decision analysis process. In order to address the identified knowledge gap, a three-phase modular decision analysis methodology is proposed. Module one uses a formal preference assessment methodology (i.e., utility function/indifference curve) for assessing decision maker utility functions with respect to a range of alternative design configurations. Module two utilizes the First Order Reliability Method (FORM) in a systems reliability approach for assessing the reliability of alternative infrastructure design configurations with respect to the probabilistic decision criteria and decision maker defined utility functions (indifference curves), and provides a meaningful feedback loop for improving the reliability of the alternative design configurations. Module three provides a systematic framework to incorporate both aleatory and epistemic uncertainties in the decision analysis methodology (i.e., uncertain utility functions and group decision making). The multi-criteria, probabilistic decision analysis framework is tested on a nine-story office building in a seismic zone with the probabilistic decision criteria of: building damage and business interruption costs, casualty costs, and CO2 emission costs. Twelve alternative design configurations and four decision maker utility functions under aleatory and epistemic uncertainties are utilized. The results of the decision analysis methodology revealed that the high-performing design configurations with an initial cost of up to $3.2M (in a cost range between $1.7M and $3.2M), a building damage and business interruption cost as low as $303K (in a cost range between $303K and $6.2M), a casualty cost as low as $43K (in a cost range between $43K and $1.2M), and a CO2 emission as low as $146K (in a cost range between $133K to $150K) can be identified by having a higher probability (i.e., up to 80%) of meeting the decision makers' preferences. The modular, holistic, decision analysis framework allows decision makers to make more informed performance-based design decisions—and allows designers to better incorporate the preferences of the decision makers—during the early design process.PHD
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LI, YUNLU. "Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System." Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533.
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Doughty, Shaun Raymond. "Development and performance evaluation of a multistatic radar system." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444153/.
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Multistatic radar systems are of emerging interest as they can exploit spatial diversity, enabling improved performance and new applications. Their development is being fuelled by advances in enabling technolo gies in such fields as communications and Digital Signal Processing (DSP). Such systems differ from typical modern active radar systems through consisting of multiple spatially diverse transmitter and re ceiver sites. Due to this spatial diversity, these systems present challenges in managing their operation as well as in usefully combining the multiple sources of information to give an output to the radar operator. In this work, a novel digital Commercial Off-The-Shelf (COTS) based coherent multistatic radar system designed at University College London, named 'NetRad', has been developed to produce some of the first published experimental results, investigating the challenges of operating such a system, and determining what level of performance might be achievable. Full detail of the various stages involved in the combination of data from the component transmitter-receiver pairs within a multistatic system is investigated, and many of the practical issues inherent are discussed. Simulation and subsequent experimental verification of several centralised and decentralised detec tion algorithms in terms of localisation (resolution and parameter estimation) of targets was undertaken. The computational cost of the DSP involved in multistatic data fusion is also considered. This gave a clear demonstration of several of the benefits of multistatic radar. Resolution of multiple targets that would have been unresolvable in a conventional monostatic system was shown. Targets were also shown to be plotted as two-dimensional vector position and velocities from use of time delay and Doppler shift information only. A range of targets were used including some such as walking people which were particularly challenging due to the variability of Radar Cross Section (RCS). Performance improvements were found to be dependant on the type of multistatic radar, method of data fusion and target characteristics in question. It is likely that future work will look to further explore the optimisation of multistatic radar for the various measures of performance identified and discussed in this work.
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Aldridge, Andrew John. "The development of an intelligent electronic chart as a decision support system for marine pilots." Thesis, Liverpool John Moores University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361506.
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Rossouw, Frans Jacobus. "Analysis of voltage regulation and network support technologies." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51588.
Full textAbstract:
Thesis (MEng)--University of Stellenbosch, 2000.ENGLISH ABSTRACT: Recent advances in semiconductor device development pushed a large number of network devices onto the market. These devices can solve network problems more effectively and economically than ever before. Network planners need tools to analyse and implement such devices to help solve the largest network problem in South Africa: voltage regulation. Rural networks experience the majority of voltage-regulation problems in South Africa. The networks are long sub-transmission and reticulation networks and are modelled by two generic networks, namely a radial network and a two-source ring network. The equations describing voltage regulation for the generic networks are developed and implemented in PSAT, a software analysis tool. The voltage regulation for two case studies that represent the two generic networks are analysed. Four generic network devices are defined and various control methods for these devices are developed to solve the network problem. The aim of PSAT is to help the network planner to quickly evaluate a number of possible solutions and to choose the best solution for further studies. This is demonstrated with the aid of the case studies. PSAT provides a sturdy platform on which future developments, such as stability analyses, can be built. However, PSAT can already function as a stand-alone analysis tool to solve voltage regulation as a network problem.
AFRIKAANSE OPSOMMING: Onlangse vooruitgang in halfgeleier ontwikkeling het 'n groot aantal netwerktoestelle op die mark geplaas. Hierdie toestelle kan netwerk probleme doeltreffender en meer ekonomies oplos as ooit vantevore. 'n Behoefte aan 'n pakket wat netwerkbeplanners in staat stelom die netwerktoestelle te analiseer, is geïdentifiseer. So 'n pakket sal hulle help om die vernaamste netwerkprobleem in Suid-Afrika, nl. spanningsregulasie, op te los. Die oorgrote meerderheid spanningsregulasie probleme word op die platteland ondervind. Plattelandse netwerke word gekenmerk deur lang sub-transmissie en retikulasie netwerke. Hierdie netwerke word met behulp van twee generiese netwerke gemodelleer. 'n Radiale netwerk en 'n dubbelbron ringnetwerk word aangewend om enige plattelandse netwerk te analiseer. Vergelykings is vir spanningsanalise ontwikkel en in PSAT, 'n analitiese sagteware pakket, geïmplementeer. Twee gevallestudies is gedoen om die twee netwerke afsonderlik voor te stel en die vergelykings van PSAT te evalueer. Alle netwerktoestelle is in een van vier generiese kategorieë geklassifiseer. Modelle is vir elk van die kategorieë ontwikkel vtr spanningsregulasie analise. Die doel van PSAT is om die netwerk beplanner te help om vinnig en effektief soveel moontlik opsies te ondersoek as oplossings vir 'n spesifieke netwerk probleem. PSAT is reeds 'n alleenstaande pakket wat in die toekoms uitgebrei sal word om na die analise van stabilitietsprobleme te kyk.
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Md, Ali Sawal Hamid. "System level performance and yield optimisation for analogue integrated circuits." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/69724/.
Full textAbstract:
Advances in silicon technology over the last decade have led to increased integration of analogue and digital functional blocks onto the same single chip. In such a mixed signal environment, the analogue circuits must use the same process technology as their digital neighbours. With reducing transistor sizes, the impact of process variations on analogue design has become prominent and can lead to circuit performance falling below specification and hence reducing the yield. This thesis explores the methodology and algorithms for an analogue integrated circuit automation tool that optimizes performance and yield. The trade-offs between performance and yield are analysed using a combination of an evolutionary algorithm and Monte Carlo simulation. Through the integration of yield parameter into the optimisation process, the trade off between the performance functions can be better treated that able to produce a higher yield. The results obtained from the performance and variation exploration are modelled behaviourally using a Verilog-A language. The model has been verified with transistor level simulation and a silicon prototype. For a large analogue system, the circuit is commonly broken down into its constituent sub-blocks, a process known as hierarchical design. The use of hierarchical-based design and optimisation simplifies the design task and accelerates the design flow by encouraging design reuse. A new approach for system level yield optimisation using a hierarchical-based design is proposed and developed. The approach combines Multi-Objective Bottom Up (MUBU) modelling technique to model the circuit performance and variation and Top Down Constraint Design (TDCD) technique for the complete system level design. The proposed method has been used to design a 7th order low pass filter and a charge pump phase locked loop system. The results have been verified with transistor level simulations and suggest that an accurate system level performance and yield prediction can be achieved with the proposed methodology.
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Flores, Joel D. "Chemical characterization and two-step cure kinetics of a high performance epoxy adhesive system." Thesis, Wichita State University, 2006. http://hdl.handle.net/10057/1609.
Full textAbstract:
The cure kinetics of a high performance epoxy adhesive system based on
TGDDM/DGEBA/DDS/DICY and toughened with carboxy terminated
poly(acrylonitrile-co-butadiene) rubber with aluminum filler was investigated using
differential scanning calorimetry. Three different sets of experiments were performed to
follow the cure kinetics of the adhesive in a multi-step cure cycle. Three-dimensional
plots of data entered into a surface-fitting software allowed for the interpolation of the
degree and rate of cure as functions of heating rate and temperature, time and
temperature, or time and initial degree of cure. Isothermal cure was modeled successfully
using the kinetic model of Kamal. The gel point of the adhesive was measured using
dynamic shear rheometry under isothermal conditions. Methods were developed to
combine ramp and soak segments so that both the conversion (α) and rate of cure (dα/dt)
can be followed through a two-step cure cycle of the type used to cure composite prepreg
and adhesive in an industrial setting.Thesis (M.S.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Chemistry.
"July 2006."