Dissertations / Theses on the topic 'Adaptive environment'
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Costello, Robert. "Adaptive intelligent personalised learning (AIPL) environment." Thesis, University of Hull, 2012. http://hydra.hull.ac.uk/resources/hull:6251.
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As individuals the ideal learning scenario would be a learning environment tailored just for how we like to learn, personalised to our requirements. This has previously been almost inconceivable given the complexities of learning, the constraints within the environments in which we teach, and the need for global repositories of knowledge to facilitate this process. Whilst it is still not necessarily achievable in its full sense this research project represents a path towards this ideal. In this thesis, findings from research into the development of a model (the Adaptive Intelligent Personalised Learning (AIPL)), the creation of a prototype implementation of a system designed around this model (the AIPL environment) and the construction of a suite of intelligent algorithms (Personalised Adaptive Filtering System (PAFS)) for personalised learning are presented and evaluated. A mixed methods approach is used in the evaluation of the AIPL environment. The AIPL model is built on the premise of an ideal system being one which does not just consider the individual but also considers groupings of likeminded individuals and their power to influence learner choice. The results show that: (1) There is a positive correlation for using group-learning-paradigms. (2) Using personalisation as a learning aid can help to facilitate individual learning and encourage learning on-line. (3) Using learning styles as a way of identifying and categorising the individuals can improve their on-line learning experience. (4) Using Adaptive Information Retrieval techniques linked to group-learning-paradigms can reduce and improve the problem of mis-matching. A number of approaches for further work to extend and expand upon the work presented are highlighted at the end of the Thesis.
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Keeble, Richard John. "An adaptive environment for personal information management." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/6509.
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This dissertation reports the results of research into the provision of adaptive user interfaces to support individuals in the management of their personal information. Many individuals find that they have increased responsibility for managing aspects of their own lives, including the information associated with their jobs. In contrast with traditional approaches to information management, which are generally driven by organisational or business requirements, the requirements of personal information management systems tend to be less rigidly defined. This dissertation employs research from the areas of personal information management and adaptive user interfaces - systems which can monitor how they are used, and adapt on a personal level to their user - to address some of the particular requirements of personal information management systems. An adaptive user interface can be implemented using a variety of techniques, and this dissertation draws on research from the area of software agents to suggest that reactive software agents can be fruitfully applied to realise the required adaptivity. The reactive approach is then used in the specification and development of an adaptive interface which supports simple elements of personal information management tasks. The resulting application is evaluated by means of user trials and a usability inspection, and the theoretical architectures and techniques used in the specification and development of the software are critically appraised. The dissertation demonstrates an application of reactive software agents in adaptive systems design and shows how the behaviour of the system can be specified based on the analysis of some representative personal information management tasks.
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Markkanen, P. (Piia). "Intelligent and adaptive lighting in retail environment." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201305241335.
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The aim of this diploma thesis work was to create new applications for intelligent and adaptive lighting in retail environment. Lighting is an important factor in generating atmosphere in retail space and it has been shown to affect customer behavior. Combining intelligent technology with lighting design enables new applications for creating an environment that senses the presence of the user. It can be employed to adapt the lighting to inform and guide the customer by creating visual focal points. Alternatively, the level of illumination can be adapted to the different requirements of the use, e.g. the presence of customers or employees. The methods used in this study were scenario working and implementation. Four major themes were defined to approach the subject: 1. Navigation and guidance, 2. Product display and browsing, 3. Pleasure and entertainment, and 4. Natural light and simulated natural light. The themes were studied in a form of short stories written from point of view of both customer or designer, and the chosen applications were further studied and implemented in a hypermarket environment. The implementations were presented as two case studies: Aisles and shelves and Landmarks and dynamic display lighting. The first case study describes lighting of the grocery store shelves. The following things were considered in the design: the noticeability of the ends of the shelves that have high value in product placement, the direction of the light, and the adaptability of lighting to the customer’s presence. An approaching customer triggers the sequential brightening of luminaires in between the shelves. The second case study considered focal points in retail environment and dynamic display lighting. In the lighting design, the landmarks, or focal points, are areas of interest that appeal and guide the customer. This is achieved in the design by using higher intensity of light compared to the surrounding environment or more colorful lighting. By displaying products under dynamic lighting, the changes in light intensity attract customer’s attention and increase the noticeability of products illuminated in this fashion. Lighting is a versatile tool that can be easily used to change the appearance and atmosphere of retail environment from one season to another, keeping the store interesting and appealing to the customer. With current technology, these changes can be applied in an intelligent and adaptive manner: lighting can interact with customers and employees, and it can be made easily controllable for designers and visualists. The discovered applications can be applied to several types of retail environments, and depending on the application, also to other types of architectural spaces, for example museums and exhibition spacesDiplomityöni tavoitteena on kehittää uudenlaisia älykkäitä ja mukautuvia valaistusratkaisuita myymälätiloihin. Valaistus on tärkeä myymälätilojen ilmapiirille ja sen on osoitettu vaikuttavan asiakkaan käyttäytymiseen. Kun valaistussuunnittelu soveltaa älykästä teknologiaa, ihmisen läsnäoloa aistivaa ympäristöä voidaan toteuttaa uusilla tavoilla. Vaihtoehtoisesti, valaistuksen tasoa voidaan säätää tilan eri käyttötarkoituksen mukaan, esimerkiksi asiakkaan tai henkilökunnan tarpeisiin. Diplomityöni on tehty käyttäen menetelminä skenaariotyöskentelyä ja suunnittelua. Käsittelin aihetta neljän pääteeman mukaisesti: 1. Liikkuminen ja ohjaaminen, 2. Esillepano ja löytäminen, 3. Viihtyminen ja viihdyttäminen sekä 4. Luonnonvalo ja luonnonvalon simulointi. Kirjoitin teemoista lyhyitä tarinoita asiakkaan ja suunnittelijan näkökulmista. Tutkin valittuja käyttökohteita tarkemmin ja sovelsin suunnitelmia hypermarket-ympäristöön. Esittelen suunnitelmaosuuden kahden esimerkin kautta: Hyllyt ja käytävät sekä Kiintopisteet ja dynaaminen tuotevalaistus. Ensimmäinen esimerkki käsittelee ruokaosaston hyllyjen valaistusta. Suunnittelussa olen kiinnittänyt huomiota hyllyjen päätyyn sijoitettujen tuotteiden näkyvyyteen, valon suuntaukseen ja valaistuksen mukautumiseen asiakkaan läsnäoloon. Lähestyvä asiakas aktivoi hyllyjen väliin sijoitettujen valaisinten vaiheittaisen kirkastumisen. Toisessa esimerkissä käsittelen kiintopisteitä myymälätilassa ja dynaamista tuotteiden valaistusta. Olen käyttänyt kiintopisteiden valaisussa ympäristöä suurempaa valon intensiteettiä tai värillistä valoa houkuttelemaan ja ohjaamaan asiakasta. Tuotteisiin kohdistuvan valon määrän muutokset herättävät asiakkaan mielenkiinnon lisäten valaistujen tuotteiden näkyvyyttä. Valaistus on monipuolinen työkalu, jolla voi helposti muuttaa myymälätilan ilmettä ja tunnelmaa ja siten pitää yllä asiakkaan mielenkiintoa sesongista toiseen. Älykkään nykyteknologian keinoin voidaan toteuttaa mukautuva, asiakkaan ja työntekijän kanssa vuorovaikuttava valaistus, joka on helposti suunnittelijan ja visualistin toteutettavissa ja ohjattavissa. Työssä käsiteltyjä uusia käyttötarkoituksia voi soveltaa myös muihin ympäristöihin, kuten museoihin ja näyttelytiloihin
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Singh, Nisheet. "Sense Respond Environment for Adaptive Participatory Services." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274975205.
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Aljojo, Nahla Mohamed. "Teacher assisting and subject adaptive material system : an Arabic adaptive learning environment." Thesis, University of Portsmouth, 2012. https://researchportal.port.ac.uk/portal/en/theses/teacher-assisting-and-subject-adaptive-material-system(f5231b3c-7b5a-41e5-a26d-c286da1d2529).html.
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This thesis reports on research to develop the first adaptive learning system for the Arabic language. The research also develops the first robust translation of the Felder-Soloman Index of Learning Styles (ILS) instrument into Arabic. Literal translation of the ILS applied to a pilot study resulted in lower internal validity in the instrument than found in the English language versions. The research discusses the development of a translation protocol undertaken to improve the validity and internal reliability of the Arabic version of the ILS. The new Arabic version of the Felder-Soloman Index of Learning Styles (ILS) instrument has been applied to two Arabic speaking groups in different Faculties at the King Abdul-Aziz University in Saudi Arabia: The Arts and Humanities Faculty and the Economics and Administration Faculty a total of 1204 students. Further analysis indicates that the Arabic version of the Felder-Soloman Index of Learning Styles (ILS) seems to be an appropriate psychometric instrument to identify learning styles in Arabic speaking communities. The second major part of the research was to use the Felder-Soloman Index of Learning Styles (ILS) instrument to develop an adaptive learning styles system and evaluate its effectiveness. The Teacher Assisting and Subject Adaptive Material System (TASAM) was tested out on different cohorts of students. Results showed that students taught using the learning style adaptive system performed significantly better in academic achievement than students taught the same material without adaptation to learning style. The feedback of student’s Survey overall students seemed to have enjoyed using the TASAM system and there seemed to have been a positive impact on learning performance. The thesis also provides guidance on translations of psychometric instrument and developing adaptive learning system.
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Famorzadeh, Shahram. "BEEHIVE : an adaptive, distributed, embedded signal processing environment." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/14803.
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Bairaktaris, Dimitrios. "Adaptive pattern recognition in a real-world environment." Thesis, University of St Andrews, 1991. http://hdl.handle.net/10023/9261.
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This thesis introduces and explores the notion of a real-world environment with respect to adaptive pattern recognition and neural network systems. It then examines the individual properties of a real-world environment and proposes Continuous Adaptation, Persistence of information and Context-sensitive recognition to be the major design criteria a neural network system in a real-world environment should satisfy. Based on these criteria, it then assesses the performance of Hopfield networks and Associative Memory systems and identifies their operational limitations. This leads to the introduction of Randomized Internal Representations, a novel class of neural network systems which stores information in a fully distributed way yet is capable of encoding and utilizing context. It then assesses the performance of Competitive Learning and Adaptive Resonance Theory systems and again having identified their operational weakness, it describes the Dynamic Adaptation Scheme which satisfies all three design criteria for a real-world environment.
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Brugnolli, Mateus Mussi. "Predictive adaptive cruise control in an embedded environment." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-24092018-151311/.
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The development of Advanced Driving Assistance Systems (ADAS) produces comfort and safety through the application of several control theories. One of these systems is the Adaptive Cruise Control (ACC). In this work, a distribution of two control loops of such system is developed for an embedded application to a vehicle. The vehicle model was estimated using the system identification theory. An outer loop control manages the radar data to compute a suitable cruise speed, and an inner loop control aims for the vehicle to reach the cruise speed given a desired performance. For the inner loop, it is used two different approaches of model predictive control: a finite horizon prediction control, known as MPC, and an infinite horizon prediction control, known as IHMPC. Both controllers were embedded in a microcontroller able to communicate directly with the electronic unit of the vehicle. This work validates its controllers using simulations with varying systems and practical experiments with the aid of a dynamometer. Both predictive controllers had a satisfactory performance, providing safety to the passengers.A inclusão de sistemas avançados para assistência de direção (ADAS) tem beneficiado o conforto e segurança através da aplicação de diversas teorias de controle. Um destes sistemas é o Sistema de Controle de Cruzeiro Adaptativo. Neste trabalho, é usado uma distribuição de duas malhas de controle para uma implementação embarcada em um carro de um Controle de Cruzeiro Adaptativo. O modelo do veículo foi estimado usando a teoria de identificação de sistemas. O controle da malha externa utiliza dados de um radar para calcular uma velocidade de cruzeiro apropriada, enquanto o controle da malha interna busca o acionamento do veículo para atingir a velocidade de cruzeiro com um desempenho desejado. Para a malha interna, é utilizado duas abordagens do controle preditivo baseado em modelo: um controle com horizonte de predição finito, e um controle com horizonte de predição infinito, conhecido como IHMPC. Ambos controladores foram embarcados em um microcontrolador capaz de comunicar diretamente com a unidade eletrônica do veículo. Este trabalho valida estes controladores através de simulações com sistemas variantes e experimentos práticos com o auxílio de um dinamômetro. Ambos controladores preditivos apresentaram desempenho satisfatório, fornecendo segurança para os passageiros.
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Kapočiūtė-Dzikienė, Jurgita. "Induction of environment and goal models by an adaptive agent in deterministic environment." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110201_145709-70884.
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If the laws of percepts change, which are described by deterministic Markov decision process, exist in the observable or partially observable environment, then the agent by interacting with the environment and having no initial knowledge is capable to discover those laws using the methods of logical and constructive induction (i.e. is capable to learn environment and goal models); it is capable to learn predicting precisely its own consequences of actions and apply this learned knowledge in order to achieve its own goals in the new unseen situations.
Adaptive agent proposed in this dissertation differs from other similar works presented in the literature in three novel potentials that enables this agent to solve the problem of knowledge transferability from one environment into another, when the same laws are valid for the environments; to solve the problem of goal percepts generalization; and to solve the problem of perceptual aliasing in the partially observable environment.
During the investigations it was discovered that adaptive agent using created environment model solves the tasks of knowledge transferability into new environments better than other alternative agents (based on Q-learning and ADP methods); using created goal model solves the goal percepts generalization tasks by correctly approximating the reward function and predicting its values in the new environments; solves the problem of perceptual aliasing by transforming the deterministic nth order Markov... [to full text]Jei stebimoje ar iš dalies stebimoje aplinkoje galioja būsenų kaitos dėsniai, nusakomi deterministiniu Markovo sprendimo procesu, tai agentas, sąveikaudamas su aplinka ir neturėdamas jokių pradinių žinių, gali šiuos dėsnius atrasti loginės ir konstrukcinės indukcijos metodais (išmokti aplinkos ir tikslo modelius), gali išmokti tiksliai prognozuoti savo veiksmų pasekmes ir taikyti šias žinias, kad greičiau pasiektų savo tikslus naujose nematytose situacijose. Disertacijoje siūlomas adaptyvus agentas nuo literatūroje pristatomų panašių darbų skiriasi trimis naujomis galimybėmis, nes: geba spręsti vienoje aplinkoje išmoktų žinių perkeliamumo į naujas aplinkas problemą, kai aplinkoms galioja tie patys dėsniai; tikslo stebėjimų apibendrinimo problemą; stebėjimų daugiareikšmiškumo problemą dalinai stebimoje aplinkoje. Tyrimų metu nustatyta, kad adaptyvus agentas, naudodamas sukurtą aplinkos modelį, žinių perkeliamumo į naujas aplinkas uždavinius sprendžia geriau nei kiti alternatyvūs agentai (grindžiami Q-mokymu ir ADP metodais); tikslo stebėjimų apibendrinimo uždavinius, naudodamas sukurtą tikslo modelį, sprendžia teisingai aproksimuodamas atlygio funkciją ir prognozuodamas pastiprinimo reikšmes naujose aplinkose; stebėjimų daugiareikšmiškumo problemą sprendžia pertvarkydamas deterministinį n-tos eilės Markovo sprendimo procesą į 1-os eilės ir jam sukurdamas aplinkos modelį, atitinkantį baigtinį Muro automatą.
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McClintock, Shaunna. "Soft computing : a fuzzy logic controlled genetic algorithm environment." Thesis, University of Ulster, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268579.
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Eriksson, Oliver, and Philip Lindau. "Evaluating an adaptive music system in an adventure game environment." Thesis, Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-22821.
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Adaptiv musik ändras beroende av parametrar som ändras av händelser i spelet. Den här studien undersöker om ett adaptivt musik system är en förbättring i spelet A Story About My Uncle jämfört med statisk musik, om det är värt tidsinvesteringen som implementationen kräver. Data samlas in genom att ta in testare som spelar en introduktionsnivå i spelet två gånger, en gång med statisk musik och en gång med adaptiv musik. Spelarna svarar på en enkät efter varje genomspelning av nivåerna. Resultaten visar ingen signifikant skillnad mellan den statiska och adaptiva versionen när man undersöker spelarnas generella spelupplevelse, och upplevelse av musiken i nivåerna.
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Huang, Ming-Yaw. "Characterisation of laser cutting for an adaptive control environment." Thesis, University of Glasgow, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284743.
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Hussain, S. A. "An active scheduling paradigm for open adaptive network environment." Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273292.
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Al-Kindi, Manal Jamil. "Implementation of adaptive noise cancellation in the diving environment." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304949.
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Taylor, Simon. "Design environment and anisotropic adaptive meshing in computational magnetics." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301211.
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Lin, Xiaobin. "Distributed adaptive e-assessment in a higher education environment." Thesis, Bucks New University, 2011. http://bucks.collections.crest.ac.uk/9625/.
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The rapid growth of Information Communication Technology (ICT) has promoted the development of paperless assessment. Most of the e-Assessment systems available nowadays, whether as an independent system or as a built-in module of a Virtual Learning Environment (VLE), are fixed-form e-Assessment systems based on the Classical Test Theory (CTT). In the meantime, the development of psychometrics has also proven the potential for e-Assessment systems to benefit from adaptive assessment theories. This research focuses on the applicability of adaptive e-Assessment in daily teaching and attempts to create an extensible web-based framework to accommodate different adaptive assessment strategies for future research. Real-data simulation and Monte Carlo simulation were adopted in the study to examine the performance of adaptive e-Assessment in a real environment and an ideal environment respectively. The proposed framework employs a management service as the core module which manages the connection from distributed test services to coordinate the assessment. The results of this study indicate that adaptive e-Assessment can reduce test length compared to fixed-form e-Assessment, while maintaining the consistency of the psychometric properties of the test. However, for a precise ability measurement, even a simple adaptive assessment model would demand a sizable question bank with ideally over 200 questions on a single latent trait. The requirements of the two categories of stakeholders (pedagogical researchers and educational application developers), as well as the variety and complexity of adaptive models, call for a framework with good accessibility for users, considerable extensibility and flexibility for implementing different assessment models, and the ability to deliver excessive computational power in extreme cases. The designed framework employs a distributed architecture with cross-language support based on the Apache Thrift framework to allow flexible collaboration of users with different programming language skills. The framework also allows different functional components to be deployed distributedly and to collaborate over a network.
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Cole, Abimbola Y. "Adaptive user specific learning for environment sensitive hearing aids." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/28083.
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One of the main complaints of hearing aid users is the difficulty of and need for frequent adjustments they have to make to the device. Typically, volume control and other settings prescribed during the hearing aid fitting process still need to be fine-tuned in real life to meet the specific varying needs of the user in different environments. Recently, learning algorithms have been introduced to minimize these problems. By taking a weighted average of the past adjustments, the device is able to adapt to the preferred setting for each environment presented. Typically, fixed learning algorithms are used for all users and environments. In reality, users have different behaviors and the optimum learning time is expected to vary over users and environments.
In this thesis, we study the potential for user-specific adaptive learning of the user settings. Profiles of various types of user behaviors were generated and the optimum time constant for learning user preferences was determined in each case using fixed exponential smoothing. We show that the performance of the algorithm is clearly dependent on the user profile and no single fixed time constant is optimum for all users or situations. Three adaptive exponential smoothing methods were then evaluated. Four performance measures are proposed to evaluate these methods based on the users' preferred setting when they re-enter the same environment. For some user profiles, adaptive methods were found to perform as well as the optimum time constant when learning user preferences for volume control without having prior knowledge of the users' behavior. In particular it is shown that the method by W. M. Chow ( Journal of Industrial Engineering, 16, pp. 314-317, 1965) can be tuned to perform as well as the optimum time constant for a given user.
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Aggarwal, Vikas. "Remote sensing and imaging in a reconfigurable computing environment." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012171.
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Mahmood, Omer. "ADAPTIVE PROFILE DRIVEN DATA CACHING AND PREFETCHING IN MOBILE ENVIRONMENT." University of Sydney. Information Technologies, 2005. http://hdl.handle.net/2123/714.
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This thesis describes a new method of calculating data priority by using adaptive mobile user and device profiles which change with user location, time of the day, available networks and data access history. The profiles are used for data prefetching, selection of most suitable wireless network and cache management on the mobile device in order to optimally utilize the device�s storage capacity and available bandwidth. Some of the inherent characteristics of mobile devices due to user movements are �non-persistent connection, limited bandwidth and storage capacity, changes in mobile device�s geographical location and connection (eg. connection can be from GPRS to WLAN to Bluetooth). New research is being carried out in making mobile devices work more efficiently by reducing and/or eliminating their limitations. The focus of this research is to propose, evaluate and test a new user profiling technique which specifically caters to the needs of the mobile device users who are required to access large amounts of data, possibly more than the device storage capability during the course of the day or week. This work involves the development of an intelligent user profiling system along with mobile device caching system which will first allocate weight (priority) to the different sets and subsets of the total given data based on user�s location, user�s appointment information, user�s preferences, device capabilities and available networks. Then the profile will automatically change the data weights with user movements, history of cached data access and characteristics of available networks. The Adaptive User and Device Profiles were designed to handle broad range of the issues associated with: �Changing network types and conditions �Limited storage capacity and document type support of mobile devices �Changes in user data needs due to their movements at different times of the day Many research areas have been addressed through this research but the primary focus has remained on the following four core areas. The four core areas are : selecting the most suitable wireless network; allocating weights to different datasets & subsets by integrating user�s movements; previously accessed data; time of the day with user appointment information and device capabilities.
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Wong, C. W., and 王振威. "An adaptive information retrieval environment for collaborative architectural design work." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B45015089.
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Taylor, Grant S. "Comparing Types of Adaptive Automation within a Multi-Tasking Environment." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5527.
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Throughout the many years of research examining the various effects of automation on operator performance, stress, workload, etc., the focus has traditionally been on the level of automation, and the invocation methods used to alter it. The goal of the current study is to instead examine the utilization of various types of automation with the goal of better meeting the operator's cognitive needs, thus improving their performance, workload, and stress. The task, control of a simulated unmanned robotic system, is designed to specifically stress the operator's visual perception capabilities to a greater degree. Two types of automation are implemented to support the operator's performance of the task: an auditory beep aid intended to support visual perception resources, and a driving aid automating control of the vehicle's navigation, offloading physical action execution resources. Therefore, a comparison can be made between types of automation intended to specifically support the mental dimension that is under the greatest demand (the auditory beep) against those that do not (the driving automation). An additional evaluation is made to determine the benefit of adaptively adjusting the level of each type of automation based on the current level of task demand, as well as the influence of individual differences in personality. Results indicate that the use of the auditory beep aid does improve performance, but also increases Temporal Demand and Effort. Use of driving automation appears to disengage the operator from the task, eliciting a vigilance response. Adaptively altering the level of automation to meet task demands has a mixed effect on performance and workload (reducing both) when the auditory beep automation is used. However, adaptive driving automation is clearly detrimental, causing an increase in workload while decreasing performance. Higher levels of Neuroticism are related to poorer threat detection performance, but personality differences show no indication of moderating the effects of either of the experimental manipulations. The results of this study show that the type of automation implemented within an environment has a considerable impact on the operator, in terms of performance as well as cognitive/emotional state.ID: 031001412; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: James L. Szalma.; Title from PDF title page (viewed June 13, 2013).; Thesis (Ph.D.)--University of Central Florida, 2012.; Includes bibliographical references (p. 93-104).
Ph.D.
Doctorate
Psychology
Sciences
Psychology; Human Factors Psychology
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Ritter, Robert D. "Parametric design of an adaptive line enhancer for multiple switching tones in a correlated noise environment." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45170.
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This thesis demonstrates how a Fast Gradient approximation to a Lattice Filter can be used as an Adaptive Line Enhancer for sampled data consisting of multiple switching tones in correlated noise. A tradeoff analysis is performed with four methods of digital filtering including a conventional Digital Fourier Transform (DFT) algorithm, a Least Mean Squares (LMS) adaptive algorithm, a Fast Recursive Least Squares (Fast RLS) adaptive algorithm, and the Fast Gradient adaptive algorithm. The DFT algorithm is incapable of removing correlations from the incoming noise, and the LMS and Fast RLS algorithms become unstable when a dynamic switching environment is being filtered. The Fast Gradient adaptive algorithm simulated on a computer is robust and capable of converging to an optimal set of FIR filter weights with minimum Mean Squared Error. Parameters for the Fast Gradient algorithm are optimized to provide good filter performance with a minimum number of computations.Master of Science
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Porter, N. Wayne. "Resource usage for adaptive C4I models in a heterogeneous computing environment." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA366190.
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Thesis (M.S. in Computer Science) Naval Postgraduate School, June 1999."June 1999". Thesis advisor(s): Debra Hensgen, William G. Kemple. Includes bibliographical references (p. 175-179). Also available online.
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Ramaswamy, Ganesh Nachiappa. "Adaptive classification of interfering signals in a shared radio frequency environment." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/28009.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.Includes bibliographical references (leaves 107-114).
by Ganesh Nachiappa Ramaswamy.
M.S.
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Liu, Fei. "Adaptive search in consumer-generated content environment: an information foraging perspective." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/326.
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Inefficiencies associated with online information search are becoming increasingly prevalent in digital environments due to a surge in Consumer Generated Content (CGC). Despite growing scholarly interest in investigating users' information search behavior in CGC environments, there is a paucity of studies that explores the phenomenon from a theory-guided angle. Drawing on Information Foraging Theory (IFT), we re-conceptualize online information search as a form of adaptive user behavior in response to system design constraints. Through this theoretical lens, we advance separate taxonomies for online information search tactics and strategies, both of which constitute essential building blocks of the search process. Furthermore, we construct a research framework that bridges the gap between online information search tactics and strategies by articulating how technology-enabled search tactics contribute to the fulfillment of strategic search goals. We validate our research framework via an online experiment by recruiting participants from Amazon Mechanical Turk (AMT). Participants were tasked to perform searches on custom-developed online review websites, which were modeled after a popular online review website and populated with real restaurant review data. Empirical findings reveal that the provision of different search features indeed engenders distinct search tactics, thereby allowing users varying levels of search determination control and search manipulation control. In turn, both types of search controls affects users' result anticipation and search costs, which when combined, determine the efficiency of goal-oriented search strategy and the utility of exploratory search strategy. This study provides valuable insights that can guide future research and practice.
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Feng, Jianshe. "Methodology of Adaptive Prognostics and Health Management in Dynamic Work Environment." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1593267012325542.
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Dramlitsch, Thomas. "Distributed computations in a dynamic, heterogeneous Grid environment." Phd thesis, Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2005/79/.
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Die immer dichtere und schnellere Vernetzung von Rechnern und Rechenzentren über Hochgeschwindigkeitsnetzwerke ermöglicht eine neue Art des wissenschaftlich verteilten Rechnens, bei der geographisch weit auseinanderliegende Rechenkapazitäten zu einer Gesamtheit zusammengefasst werden können. Dieser so entstehende virtuelle Superrechner, der selbst aus mehreren Grossrechnern besteht, kann dazu genutzt werden Probleme zu berechnen, für die die einzelnen Grossrechner zu klein sind. Die Probleme, die numerisch mit heutigen Rechenkapazitäten nicht lösbar sind, erstrecken sich durch sämtliche Gebiete der heutigen Wissenschaft, angefangen von Astrophysik, Molekülphysik, Bioinformatik, Meteorologie, bis hin zur Zahlentheorie und Fluiddynamik um nur einige Gebiete zu nennen.Je nach Art der Problemstellung und des Lösungsverfahrens gestalten sich solche "Meta-Berechnungen" mehr oder weniger schwierig. Allgemein kann man sagen, dass solche Berechnungen um so schwerer und auch um so uneffizienter werden, je mehr Kommunikation zwischen den einzelnen Prozessen (oder Prozessoren) herrscht. Dies ist dadurch begründet, dass die Bandbreiten bzw. Latenzzeiten zwischen zwei Prozessoren auf demselben Grossrechner oder Cluster um zwei bis vier Grössenordnungen höher bzw. niedriger liegen als zwischen Prozessoren, welche hunderte von Kilometern entfernt liegen.
Dennoch bricht nunmehr eine Zeit an, in der es möglich ist Berechnungen auf solch virtuellen Supercomputern auch mit kommunikationsintensiven Programmen durchzuführen. Eine grosse Klasse von kommunikations- und berechnungsintensiven Programmen ist diejenige, die die Lösung von Differentialgleichungen mithilfe von finiten Differenzen zum Inhalt hat. Gerade diese Klasse von Programmen und deren Betrieb in einem virtuellen Superrechner wird in dieser vorliegenden Dissertation behandelt. Methoden zur effizienteren Durchführung von solch verteilten Berechnungen werden entwickelt, analysiert und implementiert. Der Schwerpunkt liegt darin vorhandene, klassische Parallelisierungsalgorithmen zu analysieren und so zu erweitern, dass sie vorhandene Informationen (z.B. verfügbar durch das Globus Toolkit) über Maschinen und Netzwerke zur effizienteren Parallelisierung nutzen. Soweit wir wissen werden solche Zusatzinformationen kaum in relevanten Programmen genutzt, da der Grossteil aller Parallelisierungsalgorithmen implizit für die Ausführung auf Grossrechnern oder Clustern entwickelt wurde.
In order to face the rapidly increasing need for computational resources of various scientific and engineering applications one has to think of new ways to make more efficient use of the worlds current computational resources. In this respect, the growing speed of wide area networks made a new kind of distributed computing possible: Metacomputing or (distributed) Grid computing. This is a rather new and uncharted field in computational science. The rapidly increasing speed of networks even outperforms the average increase of processor speed: Processor speeds double on average each 18 month whereas network bandwidths double every 9 months. Due to this development of local and wide area networks Grid computing will certainly play a key role in the future of parallel computing.
This type of distributed computing, however, distinguishes from the traditional parallel computing in many ways since it has to deal with many problems not occurring in classical parallel computing. Those problems are for example heterogeneity, authentication and slow networks to mention only a few. Some of those problems, e.g. the allocation of distributed resources along with the providing of information about these resources to the application have been already attacked by the Globus software.
Unfortunately, as far as we know, hardly any application or middle-ware software takes advantage of this information, since most parallelizing algorithms for finite differencing codes are implicitly designed for single supercomputer or cluster execution. We show that although it is possible to apply classical parallelizing algorithms in a Grid environment, in most cases the observed efficiency of the executed code is very poor.
In this work we are closing this gap. In our thesis, we will
- show that an execution of classical parallel codes in Grid environments is possible but very slow
- analyze this situation of bad performance, nail down bottlenecks in communication, remove unnecessary overhead and other reasons for low performance
- develop new and advanced algorithms for parallelisation that are aware of a Grid environment in order to generelize the traditional parallelization schemes
- implement and test these new methods, replace and compare with the classical ones - introduce dynamic strategies that automatically adapt the running code to the nature of the underlying Grid environment.
The higher the performance one can achieve for a single application by manual tuning for a Grid environment, the lower the chance that those changes are widely applicable to other programs. In our analysis as well as in our implementation we tried to keep the balance between high performance and generality. None of our changes directly affect code on the application level which makes our algorithms applicable to a whole class of real world applications.
The implementation of our work is done within the Cactus framework using the Globus toolkit, since we think that these are the most reliable and advanced programming frameworks for supporting computations in Grid environments. On the other hand, however, we tried to be as general as possible, i.e. all methods and algorithms discussed in this thesis are independent of Cactus or Globus.
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Holt, Jerred Charles. "Evaluation of Real-Time Adaptive Display Systems in a Pilot Training Environment." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471617980.
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Hodge, Lovell A. "An adaptive framework for sensor planning in a coordinated multi-agent environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ65247.pdf.
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Alzahrani, Nouf Matar. "Student-summarized videos in an Adaptive and Collaborative E-learning Environment (ACES)." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/63976/.
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The purpose of this research was to develop a collaborative e-Learning framework using summarised videos as learning media to provide a more efficient learning experience where participants' engagement and motivations are enhanced. The research aims to increase participants' overall learning level, understanding level; motivation and communication skills. For this research, a collaborative environment has been built where students participate in a video sharing system allowing them to create their own summarized Videos from existing course video material. Students can then share these videos with other system participants with the ability to view, rate and comment on videos. Instructors upload the core video footage, which the students are able to edit and summarize. Two experiments were run with live modules within the Department of Informatics; a pilot study and full experiment. Feedback from the pilot study was used to develop the framework for the full study. The experiments involved pre and post participation surveys to measure satisfaction and awareness effects. Also, system participation data was used for analysis of engagement and other factors defining the outcomes of this experiment. The findings showed a considerable increase in student satisfaction regarding their understanding and motivation with video summarization tool used in the experiments. The results of [the] collaboration aspect of the experiment showed a slight increase in their satisfaction on their learning level, however, it had minimal effect on students' motivation and engagement as no significant difference was noted after using the system.
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Gargani, Sofia. "Adaptive changes of human islets to an obesogenic environment in the mouse." Thesis, Lille 2, 2013. http://www.theses.fr/2013LIL2S018/document.
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Dans les conditions normales, les organismes maintiennent une masse cellulaire endocrine stable tout au long de leur vie. En cas d’obésité, la masse de cellules b pancréatiques est capable de maintenir des taux de glucose plasmatique en augmentant la sécrétion en insuline. L’incapacité de ces cellules à fournir de l’insuline entraîne alors l’apparition d’une hyperglycémie et d’un diabète de type II. Cliniquement, la majorité des individus obèses ne développent pas de diabète car les îlots pallient à cette résistance à l’insuline. La preuve de l’adaptation de la masse d’îlots humains à l’obésité, in vivo, n’a pas été clairement décrite et, de plus, peu d’informations existent sur les mécanismes et les types cellulaires impliqués. Actuellement, la mise en évidence de l’augmentation de la masse des cellules b chez les humains obèses repose uniquement sur des études histologiques.But : Au cours de cette thèse, nous avons cherché, dans un premier temps (partie 1), à évaluer la morphologie des îlots pancréatiques et la distribution des cellules a et b chez des donneurs en état de mort cérébrale normaux, en surpoids et obèses. Dans un second temps (partie 2), nous avons étudié l’adaptation au cours du temps des îlots humains à un environnement obésogène. Nous avons montré ainsi que les îlots humains non diabétiques s’adaptent in vivo à l’obésité en modifiant la masse de cellules b, leur fonction et leur expression génique. En suite (partie 3), on a identifié le mécanisme de transdifférenciation des cellules alpha et beta en utilisant la méthode de lineage tracing. Finalement (partie 4), on a déterminé la différence sur l’expression de gène des ilots humains greffé chez les souris sous régime control ou régime riche en graisse en utilisant les puces d’ARN (Illumina).Methodes et Resultats: Des coupes de pancréas humains inclues en paraffines ont été analysées. Les donneurs obèses étaient caractérisés par une augmentation de la masse endocrine totale, de la taille des îlots, de la graisse intra-pancréatique et du ratio b:a dans les îlots, mais avec une diminution du ratio a:b dans les îlots. Au cours de l’étude longitudinale, des souris Rag2-/- non diabétiques ont été greffées sous la capsule rénale avec des îlots humains issus de donneurs en état de mort cérébrale (donneurs non diabétiques ou donneurs avec un dysfonctionnement métabolique déclaré). Les animaux ont été nourris pendant 2 semaines avec soit un régime contrôle soit un régime riche en graisse (high fat diet HFD). Un suivi du poids, du taux des triglycérides, de la glycémie et du C-peptide a été mis en place. Après sacrifice des souris, les greffons et les pancréas endogènes ont été analysés pour le volume endocrine, la distribution des cellules b et a et les mécanismes de régénération des cellules pancréatiques. Après 12 semaines sous régime gras, les souris montraient toutes les caractéristiques typiques de l’obésité, à savoir, une augmentation du poids, un doublement de la graisse abdominale, des triglycérides, de la glycémie et une sensibilité à l’insuline réduite. De plus, l’apparition sur ces animaux d’un doublement rapide de la quantité de C-peptide humain dans le sérum murin nous indique la mise en place d’une compensation fonctionnelle. Une analyse histologique des greffons a permis de mettre en évidence une adaptation de la masse endocrine des îlots avec une augmentation des cellules b. D’autres analyses ont identifié la prolifération et la néogénèse comme les mécanismes responsables de ce doublement de la masse endocrine humaine.Discussion: Ce nouveau modèle animal permet d’étudier, in vivo sur une longue période, l’adaptation des îlots humains à un environnement obésogène murin. Il peut être utilisé comme un outil dans le décryptage des voies de signalisation impliquées dans l’expansion des cellules b humaines et permettre également l’identification des facteurs prédisposant ces cellules à subir une décompensationUnder normal healthy conditions, organisms maintain a dynamic endocrinecell mass throughout life. Pancreatic beta cell mass are able to maintain plasma glucose levels increasing insulin secretion in conditions as obesity.Beta cell inability to compensate in insulin demand provokes hyperglycemia and Type 2 Diabetes. Clinically, most obese individuals do not develop diabetes because islets compensate for insulin resistance. Direct evidence that human islet mass adapts longitudinally to obesity in vivo was lacking and, moreover, little information was available on the mechanismsand cell type(s) involved.Current evidence for increased beta cell mass in obese humans (vs lean) is based entirely on postmortem histology.Aim: In this thesis, firstly (Part 1) we performed a descriptive cross sectional study by evaluating the pancreatic islet morphology and alpha and beta cell distribution from our archived human pancreatic sections of obese and normal subjects. Secondly, (Part 2) we explored the longitudinal adaptation of human islets to an obesogenic environment and showed direct evidence that non-diabetic human islets adapt bothendocrine and beta cell mass, function and gene expression to obesity in vivo. Thirdly (Part 3) we performed lineage tracing to determine which cell type alpha or beta give rise to the increase islet mass in obesity. Finally (Part 4) in this diet induced obesity model we developed, we looked at the differential gene expression with Illumina gene chips in a kinetic study on human islets which were laser capture microdissected at 6, 8 and 10 weeks on control or high fat diet.Methods: Archived human pancreatic sections were immunostained for endocrine, beta, alpha, fat. In the obese/immunodeficient mouse model, non-diabetic Rag2–/– mice were transplanted under kidney capsule with human islets from human brain-deceased donors (non-diabetics donors and donors with overt metabolic dysfunction). Animals were fed for 12 weeks with a control or high-fat diet (HFD), and followed for weight, serum triacylglycerol, fasting blood glucose and human C-peptide. After the mice were killed, human grafts and the endogenous pancreas were analyzed for endocrine volume, distribution of beta and alpha cells, and mechanisms of regeneration.Results: The cross-sectional study, performed on archived human paraffin embedded sections of normal weight, overweight, or obese subjects showed that obese donors were characterized by an increased total endocrine mass, bigger individual islet size, increased intrapancreatic fat, increased β to cell ratio and decreased :β cell ratio in islets. In the longitudinal study, concomitant with the increased weight gain, doubling of abdominal fat, increased serum triacylglycerol and reduced insulin sensitivity in 12 week HFD animals we reported that human islet grafts showed functional compensation, measured as a more than doubling of fasting human C-peptide in mouse serum, and histological adaptation of islet endocrine mass including increased beta cells. Further analysis of the human grafts revealed proliferation and neogenesis as the responsible mechanisms for the doubling of the human endocrine mass.Discussion: This novel model allows, for the first time, longitudinal studies of human islet adaptation to an obese murine environment and may be instrumental in deciphering pathways involved in human beta cell expansion, as well as in helping to identify factors predisposing human beta cells to undergo decompensation
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Lilley, Mariana. "The development and application of computer-adaptive testing in a higher education environment." Thesis, University of Hertfordshire, 2007. http://hdl.handle.net/2299/1165.
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The research reported in this thesis investigated issues relating to the use of computer-assisted assessment in Higher Education through the design, implementation and evaluation of a computer-adaptive test (CAT) for the assessment of and provision of feedback to Computer Science undergraduates. The CAT developed for this research unobtrusively monitors the performance of students during a test, and then employs this information to adapt the sequence and level of difficulty of the questions to individual students. The information about each student performance obtained through the CAT is subsequently employed for the automated generation of feedback that is tailored to each individual student. In the first phase of the research, a total of twelve empirical studies were carried out in order to investigate issues related to the adaptive algorithm, stakeholders’ attitude, and validity and reliability of the approach. The CAT approach was found to be valid and reliable, and also effective at tailoring the level of difficulty of the test to the ability of individual students. The two main groups of stakeholders, students and academic staff, both exhibited a positive attitude towards the CAT approach and the user interface. The second phase of the research was concerned with the design, implementation and evaluation of an automated feedback prototype based on the CAT approach. Five empirical studies were conducted in order to assess stakeholders’ attitude towards the automated feedback, and its effectiveness at providing feedback on performance. It was found that both groups of stakeholders exhibited a positive attitude towards the feedback approach. Furthermore, it was found that the approach was effective at identifying the strengths and weaknesses of individual students, and at supporting the adaptive selection of learning resources that meet their educational needs. This work discusses the implications of the use of the CAT approach in Higher Education assessment. In addition, it demonstrates the ways in which the adaptive test generated by the CAT approach can be used to provide students with tailored feedback that is timely and useful.
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Orichel, Thomas. "Adaptive rules in emergent logistics (ARIEL) : an agent-based analysis environment to study adaptive route-finding in changing road-networks /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FOrichel.pdf.
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Thesis (M.S. in Modeling, Virtual Environments and Simulation and M.S. in Computer Science)--Naval Postgraduate School, June 2003."This thesis is done in cooperation with the MOVES Institute"--Cover. Thesis advisor(s): Eugene Paulo, John Hiles. Includes bibliographical references (p. 49). Also available online.
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Russell, Iain Trent. "Developing a subband model for blind signal separation in an acoustic environment." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20061120.135631/index.html.
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Souza, Kolia. "The adaptive learning community environment: modifying the physical classroom to foster creativity in 4th and 5th grade gifted students." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32718.
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Master of ScienceArchitecture
R. Todd Gabbard
The purpose of the research study was to explore the role that the physical classroom environment plays in fostering student creativity in the combined fourth and fifth grade USD 475 gifted program. The research focused on answering the primary research question: Does the proposed environmental modification of the physical classroom foster creative behaviors in students? Secondary research questions included: 1) How does function-based classroom design affect both students and the classroom teacher in terms of creative process? 2) How does adaptability of the designed classroom environment affect both students and the classroom teacher in terms of creative process? A review of the literature led to the development of the author’s Framework for the Modification of Creative Learning Community Physical Environments. The study utilized a two-phase, experimental embedded research design that assessed the effects of an environmental modification to the physical classroom. Quantitative data collection methods included an environmental assessment and student survey utilizing a Likert scale. Qualitative data collection methods included participation observation, video observation, expert interviews, and open-ended student survey questions. The study found that the environmental modification of the physical classroom produced precursory creative behaviors in students. The emergent themes from the data analysis included facilitative physical environment, increased environmental acuity, leadership and self-esteem development, and improved teacher classroom management – all attributes found to be conducive to creativity development. These findings suggest further development of similar in-depth studies across a greater diversity of classroom learning environments is needed to establish reliability of the Framework for the Modification of Creative Learning Community Physical Environments.
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Sen, Shreyas. "Design of process and environment adaptive ultra-low power wireless circuits and systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45755.
Full textAbstract:
The objective of the proposed research is to investigate the design of Self-Aware Radio Frequency Circuits and Wireless Communication Systems that can adapt to environmental and process variations to always operate at minimum power levels possible, extending battery life.
The explosive growth of portable battery operated devices has mandated design of low power circuits and systems to prolong battery life. These devices fabricated in modern nanoscale CMOS technologies suffer from severe process variation due to the reduced controllability of the fabrication process, causing yield loss. This calls for integrated low power and process tolerant design techniques, or design of systems that can adapt to its process and environment to maintain its performance while minimizing power consumption.
Currently, most of the wireless circuits are designed to meet minimum quality-of-service requirements under worst-case wireless link conditions (interference, noise, multi-path effects), leading to high power consumption when the channel is better than worst-case. In this research, we develop a multi-dimensional adaptation approach for wireless transmitters and receivers that optimally trades-off power vs. performance across temporally changing operating conditions by concurrently tuning control parameters in the RF front end to lower power consumption. Tunable circuits (e.g. LNA) with built-in tuning knobs providing independent controllability of important specifications allow optimal adaptation. Process sensing using intelligent test and calibration facilitates yield improvement and the design of process tolerant environment adaptive systems.
Low cost testing methodologies are developed for identification of the health of the wireless circuit/system. These are used in conjunction with tuning algorithms that tune a wireless system under process variation to meet performance specifications and recover yield loss. This testing and adaptation is performed once during the post manufacture test/tune phase to compensate for manufacturing variations. This can also be applied periodically during in field operation of a device to account for performance degradation due to ageing. Finally, process tolerant environment adaptive systems are designed.
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Ananta, Gede Pramudya. "Using an adaptive web-based learning environment to develop conceptual and procedural knowledge." Access electronically, 2004. http://ro.uow.edu.au/theses/202.
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Lin, Chih-Yuan, and 林志垣. "Adaptive Programming Learning Environment." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49992715977488559003.
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碩士雲林科技大學
資訊管理系碩士班
98
In a traditional programming language course, the instructor provides one set of exercises for all the students, not considering the background and portfolio of each student. Resulting in many students with good capabilities wasting unnecessary time on some basic questions lengthening the language learning time, and reduces learning performance. This study provides an adaptive programming learning environment that allows students to join a course, according to their background ability. Adaptive analysis and determination system automatically provides students with different levels of questions according to student’s learning performance, and no longer require all students to practicing the same set of exercises. This study, takes 76 students from the Department of Information Management of National Yunlin University of Science and Technology as samples. They use an adaptive programming learning environment to learn Java programming language, and use post-test analysis to study the effect of adaptive learning and traditional learning. Our study shows that adaptive learning and traditional learning no significant difference in their effectiveness.
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CHANG, LI MIN, and 張立民. "Building Adaptive Ubiquitous Learning Environment for Eco-Environmental Education." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/29092597038543080121.
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碩士亞洲大學
資訊工程學系碩士在職專班
97
In traditional eco-environmental education in school, the teachers usually prepare some related materials for teaching before class, and therefore the students can learn the ecological knowledge regarding animals and plants only by their imagination. However, current eco-environmental education courses usually implemented outdoors, hence it can enhance the learners’ awareness about ecological knowledge. In this research, an adaptive ubiquitous learning system for outdoor eco-environmental education is constructed in Nei-Hu Elementary School according to the guidelines of eco-environmental education in the Grade 1-9 Curriculum released by the Ministry of Education. The proposed system can not only guide the learners to learn in the natural learning environment, but also can provide adaptive learning sheets and learning materials to the learners according to their personal learning portfolios. In this research, the third-grade students of Nei-Hu Elementary School are fairly divided into two groups, experimental group and control group. The students of experimental group are taught by outdoor ubiquitous eco-environmental learning system, and the students of control group are taught by traditional instruction. During the learning process, diagnosis and assessment are implemented to determine the differences on the learning performances between those two student groups.
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Su, Wen Hung, and 蘇文鴻. "Adaptive Payment System for Mobile Environment." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/06989472772500043190.
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Wei-Chieh, Chi. "ANSWER: Adaptive Network Selection in WLAN/UMTS Environment." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2407200616214200.
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Shan, Chia-Hsin, and 沈家興. "Adaptive Uniform Circular Array Beamforming under Coherent Environment." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86808195311634132338.
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碩士臺灣大學
電信工程學研究所
95
Gernerally, if there is no correlation or incoherent between the desired signal and the interference, adaptive antenna array can receive desire signals and suppress the interference. But there will be signal cancellation in the presence of coherent interference. The reason is that the output power minimination process not only suppresses the interference but also uses the coherent interference to cancel desire signals. Coherent interference usually occur in involving mutipath propagation or smart jammer. Many approaches, such as Spatial Smoothing, Weight Spatial Smoothing, ITAM, are proposed for solving the signal cancellation due to coherent interference, but these methods can only be applied to Uniform Linear Array. However, the direction vectors of Uniform Circular Array don’t have the vandermonde structure. The above methods can not be applied to Uniform Circular Array (UCA). In this thesis, exploiting the estimates of coherent interference incident directions, coherent interference are eliminated from the transformation of received array data , to suppress incoherent interference, the output power is minimized by the transformation of received data subject to unit gain of the desired signal. Two methods, namely DMV and SMV, are extended to the structure of the wideband UCA and are accomplished to the structure of the generalized sidelobe canceller (GSC). Finally, we compare the performance between LCMV and GSC.
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呂翰霖. "Symbolic Environment Construction and Adaptive Symbolic Input Selection." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/24672419893763530882.
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Chi, Wei-Chieh, and 紀緯傑. "ANSWER: Adaptive Network Selection in WLAN/UMTS Environment." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/23625667015221277771.
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碩士國立臺灣大學
資訊工程學研究所
94
The objective of next generation wireless network is to provide users with anywhere, any- time connectivity, high bandwidth and novel data service. People demanding for this kind of service cause cellular network provider to consider the integration of 3G cellular systems and wireless LAN, since WLAN has the advantages of high data rates and unlicensed spec- trum. Therefore, network selection technique plays a vital role in ensuring quality of service in heterogeneous networks. To improve system performance, we propose a novel network selection algorithm that guarantees making o® to the other access network is pro‾table, which means mobile users is always-best-connected(ABC). In our selection approach, in order to decide the optimum network for mobile users, available bandwidths of all usable networks are estimated. User''s location, moving direction is used to avoid frequent hando®s. This new approach is aimed at improving performances with regard to total throughput/goodput and number of hando®s which deteriorates service quality in mobile host''s life time. We evaluate the performance of our scheme via simulations and the results agree with our goals.
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Lin, Tai-Hong, and 林泰宏. "An adaptive cache invalidation scheme in Wireless Environment." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63637184663509909913.
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碩士國立成功大學
資訊工程學系碩博士班
93
Traditional cache invalidation strategies are not suitable for mobile environments due to frequent disconnections and mobility of the clients. One proposed solution is based on invalidation reports (IRs). However, the common main drawback of the IR-based scheme is that it takes a long time to answer a query since a client has to wait for the next IR to keep cache consistent. In this paper, we propose an adaptive solution to improve this problem. By usage of early validation messages, a client can get response as fast as possible when cache hit happens. We then define a parameter as a criterion on the server side and the server can further adjust the IR interval dynamically in its capability. Simulation experiments are made with proposed scheme to evaluate the performance. The result represents that usage of early validation messages significantly reduce the query latency.
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Ming-Yu, Chuang, and 莊名宇. "Adaptive GPS Acquisition Technique in Weak Signal Environment." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/90622433020534788942.
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ZHANG, KE-ZHANG, and 張克章. "Adaptive tracking of amanenvering target in noisy environment." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/94489935282624739487.
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"Adaptive matched field processing in an uncertain propagation environment." Research Laboratory of Electronics, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/4185.
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James C. Preisig.Also issued as Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineeing and Woods Hole Oceanographic Institute, 1991.
Includes bibliographical references (p. 171-173).
Supported by DARPA. N00014-89-J-1489 Supported by NSF. MIP 87-14969 Supported by a General Electric Foundation Graduate Fellowship in Electrical Engineering, and a National Science Foudnation Graduate Fellowship.
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Lee, Yi-Kang, and 李羿慷. "Adaptive Scheduling with QoS Satisfaction in Hybrid Cloud Environment." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/74505619784445589727.
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碩士國立臺北大學
資訊工程學系
99
Cloud computing is an increasing research topic in the recent years. Cloud provides different types of services, such as PaaS, IaaS and SaaS. For an economical and efficiency way, hybrid cloud becomes an important environment. How to ensure QoS satisfaction in hybrid cloud is our main objective. We also need to maximum the utilization of private cloud and minimize the cost in public cloud. In this thesis, we have proposed an Adaptive Scheduling with QoS Satisfaction in Hybrid Cloud Environment. Combine both advantages of private cloud and public cloud: stable, security, flexibility, economically and pay-per-use, using hybrid cloud environment. It provides QoS demand for user, and guarantee job response time. Using runtime estimation and dynamic programming to achieve near-optimal allocation in private cloud and maximize the utilization and minimize the runtime of tasks. For critical inputs or overloading in private cloud, tasks should be selected to public resources. For the features in public cloud, pay-per-use, may only charge for the submit tasks in brief time. But we still try to minimize the cost of renting public slots. By better allocation on private cloud, scheduling can reduce the amount of tasks that need public slots resources. For the tasks have to be dispatched to public cloud, we choose minimal cost strategy based on the characteristic of tasks such as code size and information data size. As the experiment shows, our scheduling algorithm AsQ achieve better performance in reducing task waiting time, task runtime and task finish time than existing scheduling algorithm. In the same condition, AsQ can also guarantee more QoS satisfaction rate. Cost analysis shows for ensure deadline constraint, AsQ cost much less than others. In the experiment with COSHIC, AsQ presents better balancing between QoS and cost consideration.
50
Weng, Cheng-Yu, and 翁正宇. "Adaptive Object Detection Using Fuzzy System for Environment Change." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/02499255369925203153.
Full textAbstract:
碩士大同大學
通訊工程研究所
101
Background subtraction is an essential technique for automatic video analysis. To improve the accuracy of background subtraction in the dark environment and the light illumination changing environment, a new algorithm of adaptive background building and foreground detection based on fuzzy system has been proposed in the thesis. We apply fuzzy rules to classify the input image to 5 classes and then set the appropriate image weight for each class. In this way, the image information between bright and dusky environment will do not interfere with each other. The proposed texture feature is based on local binary pattern (LBP), while the color feature is represented by HSI color space. The experimental results show that the proposed algorithm can correctly detect the foreground in dark environment and light illumination changing environment.