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Georgilas, Athanasios-Panagiotis. "Animal proteins used as fining agents and their influence on the anthocyanins' profile." Master's thesis, ISA/UL, 2012. http://hdl.handle.net/10400.5/8610.
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Mestrado Vinifera EuroMaster - Instituto Superior de AgronomiaThe treatment of wine with fining agents is a common practice in the wine industry which aims to achieve wine’s clarity and improves its stability along the time. The objective of this work was to examine the influence of various animal proteins used as fining agents on the anthocyanins’ profile. For this experiment, two Portuguese varieties, Touriga Nacional and Trincadeira have been used in which two different concentrations have been applied for each fining product. The fining agents are commercial fining products widely used in the wine industry such as Egg Albumin, Isinglass, PVPP, Gelatin, Casesol. These proteins were added in the wines in order to perceive the effect of the adding protein and other fining agents on the wine’s anthocyanidins final composition, since that these monomeric anthocyanins have an important function on the sensory characteristics of wines, such as colour. The clarification process lasted 7 days for each fining product. At the end of each clarification period, monomeric anthocyanin analysis was carried out by HPLC. By the analysis in the HPLC, we perceived that in general the biggest impact from all the fining agents is displayed to the acylated and coumarylated derivatives of the monomeric anthocyanins rather than the 3-glucoside antocyanidins. Having this as a fact and learning through the initial analysis that Touriga Nacional is richer in these two groups rather than in glucoside derivatives we are able to explain why Touriga Nacional was more affected in all the fining treatments compared to Trincadeira that is poorer in acylated derivatives and in general it was less influenced by the fining agents. Moreover, further analysis have been carried out in order to examine the influence of the fining agents on the concentration of pigments, the quantity of condensed tannins as well as on the chromatic characteristics of the wine after fining. For the quantity of condensed tannins after fining, the results have shown that all the fining agents promoted a reduction on the final quantity of tannins after the treatments whereas for the pigments and colour intensity the impact was notably lower compared with the tannins. Regarding the impact on the colour anthocyanins, Casesol promoted the greatest influence on their quantity. In addition, the general tendency indicates that the fining products in high concentrations provoke a bigger decrease on the amount of total anthocyanins compared with the small concentrations
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Dahlström, Karolina. "How fining agents affect the tendency of pear base wine to form and stabilize foam." Thesis, Linnaeus University, School of Natural Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-7520.
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The company Kiviks Musteri AB produces a pear base wine that forms stable foam, which is problematic from a production perspective. The aim of this thesis was to investigate the factors underlying foam stability in the pear base wine and to find means for its reduction. This was done by foam testing wines and varying several variables, such as the fining agents normally used in the wine production (bentonite, gelatin, siliceous earth and activated carbon), enzyme treatment, and by changing the fermenting yeast species.
Results: The wine started to form stable foam during fermentation, and foam stability could be reduced by using more bentonite and carbon during the fining process. The other fining agents appeared to have only limited impact on foaming characteristics. No pectin was present according to the pectin test, but protein bands were evident from SDS PAGE analysis, though absent in samples treated with increased doses of bentonite.
In conclusion, pectin is not a major foaming agent in the wine, the yeast is most likely the producer of the foaming agents, carbon and bentonite have a reducing effect on foam stability, bentonite also reduces protein content. Proteins are likely to be involved in the foam stabilization but are not the sole contributors to stable foam.
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Hill, Laura Ellen. "The chemical and sensorial effects of plant-based fining agents on Washington State Riesling and Gewürztraminer wines." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/L_Hill_110909.pdf.
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Thesis (M.S. in food science)--Washington State University, December 2009.Title from PDF title page (viewed on Jan. 19, 2010). "School of Food Science." Includes bibliographical references (p. 94-99).
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Lochbühler, Bernd Christoph [Verfasser]. "The potential of yeast proteins to substitute for traditional fining agents : technological and sensory aspects / Bernd Christoph Lochbühler." Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1079139370/34.
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Webber, Witt Manuella [Verfasser]. "The allergic potential arising from proteinous wine fining agents of milk and chicken egg albumen / Manuella Webber Witt." Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1068922443/34.
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Ragnemalm, Johan. "The effects of dissolved oxygen and enological treatments on quality parameters in wine and cider." Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-32646.
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Dissolved oxygen has previously been shown to affect the colour and sensory properties of red and white wine during storage. A number of different wines and wine based sparkling ciders are made at Kiviks Musteri AB. The aim of this work is to study the effects of dissolved oxygen and different enological treatments on sensory quality and colour of red wine and sparkling apple cider during storage at different temperatures. The effects of fermentation and fining on foaming ability of pear wine are also studied. Samples of red wine were taken after different processing steps such as pumping, sulphuration, pasteurization and filling. To evaluate the effects of the processes on the wine, dissolved oxygen, colour and free SO2 were measured in each. Measurements were also made on samples of red wine stored at either 38°C or room temperature for different amounts of time. Sensory evaluations were also made of the wine samples. Colour was measured by measuring absorbance at 420, 520 and 620 nm. Dissolved oxygen was also measured after different processing steps during production of apple cider. To study the effects of dissolved oxygen on cider, three different batches of apple cider were produced, with different concentrations of dissolved oxygen. The samples were stored at either 38°C or room temperature for one week. Measurements of absorbance at 420 nm and free SO2, along with sensory evaluation were made on the cider samples before and after storage. Fermentation and fining of pear wine were made in small scale and the foaming ability was compared to that of large scale factory produced wine. Pumping and filling had negative impact on the flavour of red wine. Colour intensity increased while free SO2 decreased during storage of red wine. The sensory quality decreased during storage and a higher storage temperature had a distinctive impact on this decrease. Dissolved oxygen had no noticeable effect on changes in sensory properties of neither red wine nor cider during storage. A higher concentration of dissolved oxygen was correlated to a higher increase in colour intensity of red wine though. A higher decrease was also seen in free SO2 in red wine samples with higher dissolved oxygen content when stored at 38°C. Fermentation had a large impact on foaming properties of pear wine. Small scale wine fermentation resulted in much lower foaming ability than large scale fermentation.Syrehalten i viner har i tidigare studier visat sig kunna påverka både färg- och smakförändringar i vinerna under längre tids lagring. På Kiviks Musteri AB i Skåne produceras en mängd olika sorters vin och vinbaserade cidrar. Målet med den här studien är att studera vilken effekt syrehalten har på smak och färg i viner och cidrar från Kiviks Musteri som får lagras i olika temperaturer. Effekten av olika processteg under produktionen studeras också. Slutligen studeras även hur skumbildningen i päronvin påverkas av jäsning och klarning av vinet. Prover av rödvin togs efter de olika processtegen vinet genomgår på Kiviks Musteri. Proverna lagrades olika länge i antingen 38°C eller rumstemperatur. Färgstyrka och smak analyserades på proverna före och efter lagringen. Syrehalten analyserades också i proverna direkt efter att de tagits och svavelhalten i proverna analyserades före och efter lagringen för att mäta hur mycket proverna oxiderades under lagringen. Mätningar av syrehalt gjordes även efter olika processteg under produktionen av äppelcider på Kiviks Musteri. Vilken effekt syrehalten har på äppelcider studerades genom att tre olika satser äppelcider med olika syrehalt tillverkades. Prover från dessa lagrades en vecka i antingen 38°C eller rumstemperatur. Därefter analyserades färgstyrka, svavelhalt och smak på proverna. Hur skumbildning i päronvin påverkas av jäsning och klarning studerades genom att päronvin fick jäsa och klarnas antingen i stor skala i musteriets tankar eller i liten skala på ett laboratorium. Skumbildningen mättes genom ett test där vinprover blandades med kolsyrat vatten. De processer som inverkade starkast på smaken på rödvin var pumpning och tappning, vilka gav tydliga smakförsämringar. När rödvin lagrades så minskade svavelhalten medan färgstyrkan ökade. En försämring av smaken skedde också under lagringen, särskilt när vinet lagrades i 38°C. Syrehalten hade ingen tydlig påverkan på smaken av vare sig rödvin eller äppelcider. Syrehalten i rödvin hade däremot ett svagt samband med ökningen i förgstyrka i rödvin. Syrehalten hade även ett samband med minskningen av svavelhalten i de prover av rödvin som lagrades i 38°C. Skumbildningen i päronvin påverkades väldigt starkt av jäsningen, medan klarningen hade begränsad effekt. Skumbildningen var vesäntligt mycket lägre i päronvin som jäst i liten skala på laboratoriet än i det vin som jäst i musteriets tankar.
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Albuquerque, Carolina Maria [UNESP]. "Clarificação de suco de laranja core wash por processo de flotação auxiliado por enzimas pectinolíticas e agentes clarificantes." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/90771.
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albuquerque_cm_me_sjrp.pdf: 2192673 bytes, checksum: 95c4d486da5e0308e967a8ea5475dd6c (MD5)A recuperação dos sólidos solúveis presentes na membrana central da laranja, separada durante a etapa de extração industrial do suco, normalmente produz um suco contendo de 5 a 6ºBrix e uma série de outros compostos insolúveis (cerca de 9%), muitos dos quais contribuem para a baixa qualidade do suco, sendo responsáveis pelo amargor e adstringência. O presente trabalho propôs-se a clarificar esse suco contendo sólidos recuperados, empregando um pré-tratamento com enzimas pectinolíticas seguido por tratamento por flotação por injeção de ar comprimido auxiliada por agentes clarificantes: bentonita, sílica sol e colágeno hidrolisado. Constituíram-se os objetivos: (i) a determinação das melhores condições (tipo de enzima pectinolítica, duas hidrolases e duas pectinases, e tempo de incubação) para a degradação enzimática da pectina presente; (ii) a determinação da melhor combinação dos agentes clarificantes visando obter um subproduto clarificado através do monitoramento de parâmetros físico-químicos (capacidade floculante e transmitância) e (iii) a avaliação do processo de flotação com diferentes concentrações de bentonita (500, 1.000 e 1.500 mg L-suco-1 e pressões (490, 680 e 880 kPa) pela determinação do grau de clarificação através de monitoramento da transmitância do clarificado, pela determinação da velocidade de flotação/separação das fases, através da verificação das frações volumétricas das fases separadas (clarificado, sedimentado e flotado), em intervalos de tempos regulares durante o processo de flotação e pela análise do produto final clarificado. Os produtos clarificados foram analisados com relação ao conteúdo de sólidos solúveis e insolúveis, pH, acidez titulável, polpa, transmitância, cor (parâmetros L*, a*, b*) proteína, pectina total, sódio, hesperidina, polifenóis e bioflavonóides. Para o tratamento...
Core membrane of the orange fruit separated during the juice extraction step in the citrus processing industrial plant, is currently submitted to a soluble solids recovery process, normally producing a by product (secondary) juice containing about 5 to 6º Brix and other insoluble components (about 9%), which contribute to the juice’s low quality, since many are responsible for the bitterness and adstringency. This research aimed to clarify this by-product juice containing recovered solids, by enzyme pre-treatment with pectic enzymes, followed by a flotation treatment with compressed air injection using fining agents: bentonite, silica sol and hydrolyzed collagen. The objectives were (i) to determine the best conditions (enzyme type, two hydrolyses and two pectin-liases and incubation time) for the enzyme treatment for pectin degradation; (ii) to determine the best combination of the fining agents to obtain a clarified by-product through monitoring physical chemical parameters (flocculating ability and product transmittance); and (iii) to evaluate the flotation process and the effects of bentonite concentration (500, 1.000 and 1.500 mg L-juice-1) and saturation pressure (490, 680 and 880 kPa) by determining the degree of clarification through monitoring the product transmittance and by determining the flotation rate (and phase separation) through measurements of volumetric fractions of the separated phases (clarified, floated and sediment) over time during the flotation and phase separation processes. Both untreated and clarified juices were analyzed for soluble and insoluble solid contents, pH, total titratable acidity, pulp content, transmittance, color (parameters L*, a* and b*), protein and pectin contents, sodium, hesperidine, poliphenols and bioflavonoids. The results indicates a purified poligalacturonase as the adequate for the enzyme treatment in 1 hour, 45ºC, with 0,05 mL... (Complete abstract click electronic access below)
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Albuquerque, Carolina Maria. "Clarificação de suco de laranja "core wash" por processo de flotação auxiliado por enzimas pectinolíticas e agentes clarificantes /." São José do Rio Preto : [s.n.], 2009. http://hdl.handle.net/11449/90771.
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Orientador: Roger Darros-BarbosaBanca: Maria Aparecida Mauro
Banca: José Fernando Durigan
Resumo: A recuperação dos sólidos solúveis presentes na membrana central da laranja, separada durante a etapa de extração industrial do suco, normalmente produz um suco contendo de 5 a 6ºBrix e uma série de outros compostos insolúveis (cerca de 9%), muitos dos quais contribuem para a baixa qualidade do suco, sendo responsáveis pelo amargor e adstringência. O presente trabalho propôs-se a clarificar esse suco contendo sólidos recuperados, empregando um pré-tratamento com enzimas pectinolíticas seguido por tratamento por flotação por injeção de ar comprimido auxiliada por agentes clarificantes: bentonita, sílica sol e colágeno hidrolisado. Constituíram-se os objetivos: (i) a determinação das melhores condições (tipo de enzima pectinolítica, duas hidrolases e duas pectinases, e tempo de incubação) para a degradação enzimática da pectina presente; (ii) a determinação da melhor combinação dos agentes clarificantes visando obter um subproduto clarificado através do monitoramento de parâmetros físico-químicos (capacidade floculante e transmitância) e (iii) a avaliação do processo de flotação com diferentes concentrações de bentonita (500, 1.000 e 1.500 mg L-suco-1 e pressões (490, 680 e 880 kPa) pela determinação do grau de clarificação através de monitoramento da transmitância do clarificado, pela determinação da velocidade de flotação/separação das fases, através da verificação das frações volumétricas das fases separadas (clarificado, sedimentado e flotado), em intervalos de tempos regulares durante o processo de flotação e pela análise do produto final clarificado. Os produtos clarificados foram analisados com relação ao conteúdo de sólidos solúveis e insolúveis, pH, acidez titulável, polpa, transmitância, cor (parâmetros L*, a*, b*) proteína, pectina total, sódio, hesperidina, polifenóis e bioflavonóides. Para o tratamento... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Core membrane of the orange fruit separated during the juice extraction step in the citrus processing industrial plant, is currently submitted to a soluble solids recovery process, normally producing a by product (secondary) juice containing about 5 to 6º Brix and other insoluble components (about 9%), which contribute to the juice's low quality, since many are responsible for the bitterness and adstringency. This research aimed to clarify this by-product juice containing recovered solids, by enzyme pre-treatment with pectic enzymes, followed by a flotation treatment with compressed air injection using fining agents: bentonite, silica sol and hydrolyzed collagen. The objectives were (i) to determine the best conditions (enzyme type, two hydrolyses and two pectin-liases and incubation time) for the enzyme treatment for pectin degradation; (ii) to determine the best combination of the fining agents to obtain a clarified by-product through monitoring physical chemical parameters (flocculating ability and product transmittance); and (iii) to evaluate the flotation process and the effects of bentonite concentration (500, 1.000 and 1.500 mg L-juice-1) and saturation pressure (490, 680 and 880 kPa) by determining the degree of clarification through monitoring the product transmittance and by determining the flotation rate (and phase separation) through measurements of volumetric fractions of the separated phases (clarified, floated and sediment) over time during the flotation and phase separation processes. Both untreated and clarified juices were analyzed for soluble and insoluble solid contents, pH, total titratable acidity, pulp content, transmittance, color (parameters L*, a* and b*), protein and pectin contents, sodium, hesperidine, poliphenols and bioflavonoids. The results indicates a purified poligalacturonase as the adequate for the enzyme treatment in 1 hour, 45ºC, with 0,05 mL... (Complete abstract click electronic access below)
Mestre
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Vivacqua, Adriana Santarosa 1970. "Agents to assist in finding help." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/62943.
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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 1999.Includes bibliographical references (p. 101-105).
The problem of finding someone who might be able to help with a particular task or knowledge area exists everywhere, be it in groups of students or corporate settings. Time and effort are spent looking for relevant information when another person in the community could easily provide assistance. Our approach to addressing this problem is to use software agents to assist the search for expertise. Previous research on this topic has been mostly in the areas of information marketplaces, referral systems or information repositories. We built a system, called Expert Finder, which provides a testbed for ideas and techniques developed in the context of this thesis. Expert Finder analyzes previous work of both the novice and the expert to automatically categorize expertise and match it with the user's problem while providing a community-based incentive mechanism. We present alternative profiling and incentive mechanisms to those that had been presented in previous work. We chose the Java Programming domain for our initial implementation and testing of the system. Expert Finder uses each user's Java source files to determine their expertise and uses a Java domain model to match questions and experts. It keeps track of users' willingness to help out as a measure of the social capital in the community. We ran some tests using the prototype system to assess how well these ideas worked, and results are also reported in this thesis.
by Adriana Santarosa Vivacqua.
S.M.
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Tonupunuri, Prashanth. "Evolutionary based path-finding for mobile agents in sensor networks /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1594491051&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Li, Xiaoqing Montazemi Ali R. "Agent based buddy finding methodology for knowledge sharing /." *McMaster only, 2003.
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Pessôa, Marcus Vinicius Pereira. "Coevolução de agentes de estado finito." Instituto Nacional de Pesquisas Espaciais (INPE), 1999. http://urlib.net/dpi.inpe.br/lise/2002/03.28.19.30.
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O escopo deste trabalho concentra-se no estudo de variações de implementações de algoritmos evolutivos, na solução de problemas que envolvam a coevolução de agentes, cujo comportamento corresponda a máquinas de estado finito. Os algoritmos genéticos são a base para o processo coevolutivo, abordando comportamentos cooperativos e competitivos, onde a cooperação ocorre dentro de um grupo específico de agentes e a competição acontece entre estes grupos. Para este estudo foram variadas tanto características dos algoritmos genéticos quanto do ambiente onde ocorrem as interações entre os agentes. Fatores como a representação e controle dos elementos da população operada pelo algorítmo genético, sua seleção e operação foram explorados, de forma a avaliar quais esquemas seriam mais convenientes para aplicação nesses tipos de problemas. Para a consecução deste trabalho, foi utilizado o sistema de simulação Swarm, desenvolvido pelo Santa Fe Institute - EUA, e que tem por finalidade permitir a implementação de sistemas que envolvam grupos de agentes.This work is concerned on the study of evolutionary algorithms, in the solution of problems involving coevolution of agents, whose behavior correspond to finite state machines. The genetic algorithms are the base for the coevolutive process, approaching cooperative and competitive behaviors. The cooperation happens inside of a specific group of agents and the competition happens among these groups. For this study were varied several genetic algorithms' characteristics and the ambient where the interactions among the agents happen. Factors as the representation and control of the population's elements operated by the genetic algorithm, its selection and operation were explored, in way to evaluate which outlines would be more convenient for application in those types of problems. For the attainment of this work, the Swarm simulation system, developed by Santa Fe Institute - USA, was used.
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Dorjsuren, Delgerzul, Holly Abigail Adams, Dawnna Elisabeth Metcalfe, and Victoria E. Palau. "Finding Novel and Synergistic Cytotoxic Agents for the Treatment of Multiple Myeloma." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/180.
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Multiple Myeloma is cancer of plasma cells and is known to be highly invasive. Multiple Myeloma makes up 1% of cancer diagnosis in western countries and affects men more predominantly than women. The American Cancer Association estimates that 32,110 new cases will be diagnosed in the United States in 2019. Lenalidomide is one of the main therapies used for multiple myeloma patients, but it has toxic side effects such as thrombocytopenia, neutropenia, and anemia. The purpose of the study is to investigate new cytotoxic agents for the treatment of multiple myeloma. In addition to lenalidomide alone, this study examined the effects of doxycycline alone and in combination with lenalidomide. Lenalidomide cell cultures were treated at concentrations from 0.5μM to 10μM on untreated 24 well plates and doxycycline concentration ranging from 10μM-80μM. Following incubation, cell viability was tested using MTT assay and the samples were analyzed using spectrophotometry. When compared to lenalidomide, doxycycline monotherapy showed a greater decrease in overall cell viability in preliminary results. Our results show that there is benefit of using 10μM of Doxycycline at higher concentration of 5μM and 10μM of lenalidomide. The potential decrease in the concentration of lenalidomide used by adding doxycycline, may reduce the toxic side effects of lenalidomide. Further studies are necessary to confirm these preliminary results and investigate the mechanism of action in order to determine optimal combinations of these drugs.
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Wang, Zhu Wei. "Multi-agent path finding in an order picking system." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950627.
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Rhodes, Callum Gordon. "The collaborative iterative search approach to multi agent path finding." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/4038.
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This thesis presents a new approach to obtaining optimal and complete solutions to Multi Agent Path Finding (MAPF) problems called Collaborative Iterative Search (CIS). CIS employs a conflict based scheme inspired by the Conflict Based Search (CBS) algorithm and extends this to include a linear order lower level search. The structure of Planar Graphs is leveraged, permitting further optimization of the algorithm. This takes the form of reasoning-based culling of the search space, while maintaining optimality and completeness. Benchmarks provided demonstrate significant performance gains over the existing state of the art, particularly in the case of sparsely populated maps. The thesis draws to a conclusion with a summary of proposed future work.
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Merritts, Richard Alan. "Online Deception Detection Using BDI Agents." NSUWorks, 2013. http://nsuworks.nova.edu/gscis_etd/244.
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This research has two facets within separate research areas. The research area of Belief, Desire and Intention (BDI) agent capability development was extended. Deception detection research has been advanced with the development of automation using BDI agents. BDI agents performed tasks automatically and autonomously. This study used these characteristics to automate deception detection with limited intervention of human users. This was a useful research area resulting in a capability general enough to have practical application by private individuals, investigators, organizations and others. The need for this research is grounded in the fact that humans are not very effective at detecting deception whether in written or spoken form. This research extends the deception detection capability research in that typical deception detection tools are labor intensive and require extraction of the text in question following ingestion into a deception detection tool. A neural network capability module was incorporated to lend the resulting prototype Machine Learning attributes.
The prototype developed as a result of this research was able to classify online data as either "deceptive" or "not deceptive" with 85% accuracy. The false discovery rate for "deceptive" online data entries was 20% while the false discovery rate for "not deceptive" was 10%. The system showed stability during test runs. No computer crashes or other anomalous system behavior were observed during the testing phase. The prototype successfully interacted with an online data communications server database and processed data using Neural Network input vector generation algorithms within seconds
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Boynewicz, Kara, Deborah Backus, Jennifer Furze, Courtney D. Hall, Michael Thomas Lebec, and Michael Anton Tevald. "Finding Your Path: Developing and Implementing a Research Agenda." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etsu-works/7780.
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Developing and implementing a research agenda can be challenging, but identifying the ultimate destination and defining the intermediate steps along the path are critical. The purpose of this session is to help early-career researchers (including graduate students, postdocs, junior faculty, and those considering transitioning into academics) identify key considerations and strategies for the development and implementation of their own research agenda. The speakers will discuss identifying research topics, designing a strong research program, and building evidence of effectiveness around the agenda. The speakers represent a range of settings and experiences, allowing attendees to appreciate the diversity of types of research agenda that exist within the profession. Attendees will leave the session with specific tools and resources to help them begin to develop a research agenda that will be appropriate for a range of settings.
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El-Beltagy, Samhaa Rafee Adel. "An agent based framework for navigation assistance and information finding in context." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342770.
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Bard, Joseph. "Finding High Ground: Simulating an Evacuation in a Lahar Risk Zone." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20519.
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Large lahars threaten communities living near volcanoes all over the world. Evacuations are a critical strategy for reducing vulnerability and mitigating a disaster. Hazard perceptions, transportation infrastructure, and transportation mode choice are all important factors in determining the effectiveness of an evacuation. This research explores the effects of population, whether individuals drive or walk, response time, and exit closures on an evacuation in a community threatened by a large lahar originating on Mount Rainier, Washington. An agent-based model employing a co-evolutionary learning algorithm is used to simulate a vehicular evacuation. Clearance times increase when the population is larger and when exits are blocked. Clearance times are reduced when a larger proportion of agents opt out of driving, and as the model learns. Results indicate evacuation times vary greatly due to spatial differences in the transportation network, the initial population distribution, and individual behaviors during the evacuation.
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Risler, Max. "Behavior control for single and multiple autonomous agents based on hierarchical finite state machines /." Düsseldorf : VDI-Verl, 2009. http://d-nb.info/998464244/04.
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Rubnell, Spolander Rita. "Between given and created value : Finding new grounds for justifying human rights." Thesis, Uppsala universitet, Teologiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-395539.
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This thesis aims at formulating a human rights justification based on the assumption that disbelief in human rights is found in communicative grounds, rather than some sort of unreasonable evil. I first identify what I believe to be a flaw in the communicative strength of existing human rights justifications in explaining why rights should be. I suggest that there is a gap between the justifications of human rights that contain metaphysical narrative, and the justifications that rely on subjective experience of rights as good. I further explain how this is a gap that political consensus and the idea of Kantian moral reason cannot seem to fill. I subsequently boil this gap down to the concept of value, since the foundation for each justification is based on a type of value. These are categorized as either given value – which applies to all attributes of value that is “given” to us independently of our actions or opinions, or created value – which applies to all attributes of value that stem from social interaction (thus action) and experience. As justifications are funneled into either of these two categories of value, it begins to look like no other type of value exist, and as a result no one looks for it. To respond to this problem, I formulate a philosophical explanation, in Robert Nozicks terms. This explanation shows that there may be other routes to apply to value than sticking to simply given or created value. My explanation utilizes the three theories of philosophical anthropology, internal metaphysical realism and Wittgensteins philosophy of language, and it is based on the result of an analysis of material consisting of human rights justification arguments by Nicholas Wolterstorff, Alasdaire MacIntyre, Martha Nussbaum and Richard Rorty. The actual philosophical explanation I formulate utilizes the metaphysics of Helen Steward to provide a given-value foundation for the primitive reactions of Stefan Eriksson, which creates value through social organization. Overall, I find that there are untried possibilities which may allow for a different type of value to act as the foundation for a human rights justification. My contribution to the field rests in the novelty of the theories used in my explanation, and the angle of the problem formulation.
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Eberhardt, Darlene Michele. "Antibacterial and Laundering Properties of Ams and Phmb as Finishing Agents for Healthcare Workers Uniforms." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/27403.
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The safety of healthcare workers (HCW) has become a serious concern; therefore, a need for protection against bacterial penetration and transmission is realized. The purpose of this research is to examine whether antibacterial finishes can effectively reduce the presence of bacteria that have the potential for penetration and transmission on healthcare workers uniforms (HCWU). The specific objective of this research is to compare the antibacterial properties (i.e., bacterial reduction), two descriptive properties (i.e., fabric weight, fabric thickness), and one durability property (i.e., breaking strength loss due to abrasion) of a 65/35% polyester/cotton blend fabric treated with two commercially available antibacterial agents (i.e., 3-trimethoxysilylpropyldimethyloctadecyl ammonium chloride) or AEGIS Microbeshield, (AMS) and polyhexamethylene biguanide (PHMB) or Reputexâ · before laundering and after 5, 10, and 25 laundering cycles. The independent variables were the treatments (i.e., AMS, PHMB, no treatment) and the laundering cycles (i.e., 0, 5, 10, 25). The dependent variables were the four fabric properties: (a) antibacterial properties against Staphylococcus aureus (S. aureus) and Klebsiella pneumoniae (K. pneumoniae) bacteria, (b) fabric weight, (c) fabric thickness, and (d) breaking strength loss due to abrasion. Multiple Analysis of Variance (MANOVA) and Two-way Analysis of Variance (ANOVA) were used to examine the effects of the independent variables and their interaction on each dependent variable.
The results showed PHMB treated specimens had a significantly higher log reduction against both S. aureus and K. pneumoniae before laundering and after 5, 10 and 25 laundering cycles than AMS treated specimens and the no treatment specimens. Initially, AMS had some reduction against S. aureus and K. pneumoniae before laundering; however after laundering, the reductions against both bacteria were diminished greatly. As expected, the no treatment specimen had no reduction against S. aureus or K. pneumoniae before and after laundering. The addition of PHMB and AMS increased the fabric weight of 65/35% polyester/cotton fabric and kept the fabric thickness throughout 25 laundering cycles. The untreated specimens became thicker after 25 laundering cycles. In addition, the breaking strength loss due to abrasion indicated that treatments had no effect on fabric strength.
In conclusion, adding antibacterial agents do have some influence on bacterial reduction for both Gram-positive and Gram-negative bacteria as well as descriptive properties (i.e., fabric weight, fabric thickness). However, there was no influence on durability property (i.e., breaking strength loss due to abrasion). More studies are needed to test both agents on other types of fabrics such 100% cotton and nonwoven to incorporate more treated HCWU in the marketplace.Ph. D.
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Gehl, Alan Rodney. "The dynamics of police cooperation in multi-agency investigations, finding common ground." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59443.pdf.
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Kasaie, Sharifi Parasto Alsadat. "Timing of Tuberculosis Transmission and the Implications for Case-finding Strategies: An Agent-Based Simulation Model." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396531682.
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Bayrak, Ali Galip. "Formation Preserving Navigation Of Agent Teams In 3-d Terrains." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609756/index.pdf.
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Navigation of a group of autonomous agents that are needed to maintain a formation is a challenging task which has not been studied much in especially 3-D terrains. This thesis presents a novel approach to collision free path finding of multiple agents
preserving a predefined formation in a 3-D terrain. The proposed method could be used in many areas like navigation of semi-automated forces (SAF) at unit level in military simulations and non player characters (NPC) in computer games. The proposed path finding algorithm first computes an optimal path from an initial point to a target point after analyzing the 3-D terrain data from which it constructs a weighted graph. Then, it employs a real-time path finding algorithm specifically designed to realize the navigation of the group from one way point to the successive one on the optimal path generated at the previous stage, preserving the formation and avoiding collision both. A software was developed to test the methods discussed here.
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Patel, Rakeshkumar. "An investigation of distributed modelling and intelligent agent techniques for collaborative task support." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252233.
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Passare, Galina. "Drug use and side effects in the elderly : findings from the Kungsholmen Project /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-365-5/.
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Subbarayan, Guhan. "A systematic approach for selection of best PB-free printed circuit board (PCB) surface finish." Diss., Online access via UMI:, 2007.
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Lundberg, Edvin. "Collaboration in Multi-agent Games : Synthesis of Finite-state Strategies in Games of Imperfect Information." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209917.
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We study games where a team of agents needs to collaborate against an adversary to achieve a common goal. The agents make their moves simultaneously, and they have different perceptions about the system state after each move, due to different sensing capabilities. Each agent can only act based on its own experiences, since no communication is assumed during the game. However, before the game begins, the agents can agree on some strategy. A strategy is winning if it guarantees that the agents achieve their goal regardless of how the opponent acts. Identifying a winning strategy, or determining that none exists, is known as the strategy synthesis problem. In this thesis, we only consider a simple objective where the agents must force the game into a given state. Much of the literature is focused on strategies that either rely on that the agents (a) can remember everything that they have perceived or (b) can only remember the last thing that they have perceived. The strategy synthesis problem is (in the general case) undecidable in (a) and has exponential running time in (b). We are interested in the middle, where agents can have finite memory. Specifically, they should be able to keep a finite-state machine, which they update when they make new observations. In our case, the internal state of each agent represents its knowledge about the state of affairs. In other words, an agent is able to update its knowledge, and act based on it. We propose an algorithm for constructing the finite-state machine for each agent, and assigning actions to the internal states before the game begins. Not every winning strategy can be found by the algorithm, but we are convinced that the ones found are valid ones. An important building block for the algorithm is the knowledge-based subset construction (KBSC) used in the literature, which we generalise to games with multiple agents. With our construction, the game can be reduced to another game, still with uncertain state information, but with less or equal uncertainty. The construction can be applied arbitrarily many times, but it appears as if it stabilises (so that no new knowledge is gained) after only a few steps. We discuss this and other interesting properties of our algorithm in the final chapters of this thesis.Vi studerar spel där ett lag agenter behöver samarbeta mot en motståndare för att uppnå ett mål. Agenterna agerar samtidigt, och vid varje steg av spelet så har de olika uppfattning om spelets tillstånd. De antas inte kunna kommunicera under spelets gång, så agenterna kan bara agera utifrån sina egna erfarenheter. Innan spelet börjar kan agenterna dock komma överrens om en strategi. En sådan strategi är vinnande om den garanterar att agenterna når sitt mål oavsett hur motståndaren beter sig. Att hitta en vinnande strategi är känt som syntesproblemet. I den här avhandlingen behandlar vi endast ett enkelt mål där agenterna måste tvinga in spelet i ett givet tillstånd. Mycket av litteraturen handlar om strategier där agenterna antingen antas (a) kunna minnas allt som de upplevt eller (b) bara kunna minnas det senaste de upplevt. Syntesproblemet är (i det generella fallet) oavgörbart i (a) och tar exponentiell tid i (b). Vi är intressede av fallet där agenter kan ha ändligt minne. De ska kunna ha en ändlig automat, som de kan uppdatera när de får nya observationer. I vårt fall så representerar det interna tillståndet agentens kunskap om spelets tillstånd. En agent kan då uppdatera sin kunskap och agera utifrån den. Vi föreslår en algoritm som konstruerar en ändlig automat åt varje agent, samt instruktioner för vad agenten ska göra i varje internt tillstånd. Varje vinnande strategi kan inte hittas av algoritmen, men vi är övertygade om att de som hittas är giltiga. En viktig byggsten är den kunskapsbaserade delmängskonstruktionen (KBSC), som vi generaliserar till spel med flera agenter. Med vår konstruktion kan spelet reduceras till ett annat spel som har mindre eller lika mycket osäkerhet. Detta kan göras godtyckligt många gånger, men det verkar som om att ingen ny kunskap tillkommer efter bara några gånger. Vi diskuterar detta vidare tillsammans med andra intressanta egenskaper hos algoritmen i de sista kapitlen i avhandlingen.
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Oryani, Maryam. "Applying Agent-Based Modeling to Studying Emergent Behaviors of the Immune System Cells." Thesis, KTH, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147196.
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Huge amount of medical data has been generated in practical experiments which makes data analysis a challenging problem. This requires novel techniques to be developed. The improvements in computational power suggest to use computerbased modeling approaches to process a large set of data. One of the important systems in the human body to be investigated is the immune system. The previous studies of medical scientists and ongoing experiments at Karolinska Institute provide information about the human immune system. This information includes attributes of human immune system’s blood cells and the interactions between these cells. This interactions are provided as ‘if-then’ logical rules. Each rule verifies a condition on the attribute of one cell and it may initiate interaction processes to modify the attributes of other cells. A specific temporal value is associated to each process to quantify the speed of that process in the body (i.e., slow, medium, fast). We propose an agent-based model (ABM) to study human immune system cells and their interactions. The ABM is selected to overcome the complexity of large amount of data and find emergent properties and behavior patterns of the cells. Immune system cells are modeled as autonomous agents which have interactions with each other. Different values of a cell attributes define possible states of the cell and the collection of states of all cells constructs the state of the whole agent-based model. In order to consider the state transitions of the cells, we used a finite state machine (FSM). The first state is constructed from the input initial values for the cells and considering the logical time of 1. In each step, the program goes one time unit further and computes next state by applying the changes based on the cells’ interactions rules. This evolution of states in time is similar to game of life (GOL) automaton. The final model based on three modeling approaches of ABM, FSM and GOL are used to test medical hypothesis related to human immune system. This model provides a useful framework for medical scientists to do experiments on the cells’ attributes and their interaction rules. Considering a set of cells and their interactions, the proposed framework shows emergent properties and behavior patterns of the human immune system.
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Angus, Simon Douglas Economics Australian School of Business UNSW. "Economic networks: communication, cooperation & complexity." Awarded by:University of New South Wales. Economics, 2007. http://handle.unsw.edu.au/1959.4/27005.
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This thesis is concerned with the analysis of economic network formation. There are three novel sections to this thesis (Chapters 5, 6 and 8). In the first, the non-cooperative communication network formation model of Bala and Goyal (2000) (BG) is re-assessed under conditions of no inertia. It is found that the Strict Nash circle (or wheel) structure is still the equilibrium outcome for n = 3 under no inertia. However, a counter-example for n = 4 shows that with no inertia infinite cycles are possible, and hence the system does not converge. In fact, cycles are found to quickly dominate outcomes for n > 4 and further numerical simulations of conditions approximating no inertia (probability of updating > 0.8 to 1) indicate that cycles account for a dramatic slowing of convergence times. These results, together with the experimental evidence of Falk and Kosfeld (2003) (FK) motivate the second contribution of this thesis. A novel artificial agent model is constructed that allows for a vast strategy space (including the Best Response) and permits agents to learn from each other as was indicated by the FK results. After calibration, this model replicates many of the FK experimental results and finds that an externality exploiting ratio of benefits and costs (rather than the difference) combined with a simple altruism score is a good proxy for the human objective function. Furthermore, the inequity aversion results of FK are found to arise as an emergent property of the system. The third novel section of this thesis turns to the nature of network formation in a trust-based context. A modified Iterated Prisoners' Dilemma (IPD) model is developed which enables agents to play an additional and costly network forming action. Initially, canonical analytical results are obtained despite this modification under uniform (non-local) interactions. However, as agent network decisions are 'turned on' persistent cooperation is observed. Furthermore, in contrast to the vast majority of non-local, or static network models in the literature, it is found that a-periodic, complex dynamics result for the system in the long-run. Subsequent analysis of this regime indicates that the network dynamics have fingerprints of self-organized criticality (SOC). Whilst evidence for SOC is found in many physical systems, such dynamics have been seldom, if ever, reported in the strategic interaction literature.
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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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Sorensen, Gerrit Addison N. "A Flexible Infrastructure for Multi-Agent Systems." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd875.pdf.
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Delgado-Eckert, Edgar Wilfried. "Monomial dynamical and control systems over a finite field and applications to agent-based models in immunology." kostenfrei, 2008. http://mediatum2.ub.tum.de/doc/645326/645326.pdf.
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Ogundele, Ayodeji O. "The United States Supreme Court's Volitional Agendas, 1801-1993: Historical Claims versus Empirical Findings." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2458/.
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In this study, I examined the Supreme Court's agenda from 1801 to 1993 to determine the composition and dynamics of the issues that have dominated the business of the Court. Specifically, I set out to test empirically Robert G. McCloskey's (now standard) characterization of the Supreme Court's history, which sees it as dominated by nationalism/federalism issues before the Civil War, by economic issues just after the War through the 1930s, and by civil rights and liberties since the 1930s. The question that drove my investigation was "Is McCloskey's interpretation, which appears to be based on the great cases of Supreme Court history, an accurate description of the agenda represented in the Supreme Court's total body of reported decisions?"
To test McCloskey's historical theses I employed concepts adapted from Richard Pacelle's (1991) important work on the agenda of post-Roosevelt Court and used the methods of classical historical analysis and of interrupted time-series analysis. Data for my research came from existing datasets and from my own collection (I coded the manifest content of thousands of Supreme Court's decisions from 1887 back to 1801). The most important finding from my analyses is that McCloskey not withstanding, the pre-Civil War Supreme Court's agenda was clearly dominated by economic issues of various sorts, not by nationalism/federalism as previously believed. Another key finding is that partisanship had a pronounced impact on the Court's attention to this category of issueseven in the periods when the Supreme Court had very little control of its docket. These results suggest that Supreme Court scholars should reassess or rethink their previous notion of the Court's pre-Civil War agendathe now well-established view that nation-state issues dominated the business of the Court in its formative yearsand the idea (often expressed implicitly) that the Court's mandatory jurisdiction suppressed attitudinal factors on the Court in the earlier eras.
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Vásquez-Medina, Mirtha Jimena, Paola Jimena Villegas-Otiniano, and Vicente A. Benítes-Zapata. "Letter to the editor: “A population-based study of cervical cytology findings and human papillomavirus infection in a suburban area of Thailand”." Elsevier B.V, 2018. http://hdl.handle.net/10757/624670.
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Martin, Júnior Manoel [UNESP]. "Sistemas adesivos convencional e autocondicionante: análise micromecânica tridimensional da interface dentina-adesivo." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105580.
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martinjunior_m_dr_araca.pdf: 402142 bytes, checksum: ec08401476b3983abaa71ed519f0d4e8 (MD5)OBJETIVO: Avaliar a distribuição das tensões na interface dentina-adesivo variando o sistema adesivo, convencional e autocondicionante, através do método dos elementos finitos tridimensional. MATERIAL E MÉTODO: Foram elaborados 4 modelos no programa Solidworks 2007, sendo: Mc - representação de um espécime em dentina (41x41x82 μm) restaurado com resina composta (RC), apresentando camada de adesivo, camada híbrida (CH), TAGs, dentina peri-tubular, dentina intertubular parcialmente desmineralizada, dentina intertubular e prolongamento odontoblástico, simulando a formação da CH segundo o sistema adesivo convencional; Mr - idêntico ao Mc, com ramificações laterais do infiltrado do adesivo; Ma – idêntico ao Mc, sem TAGs, e com “smear plug”, simulando o sistema adesivo autocondicionante; Mat – idêntico ao Ma, com TAGs. Os modelos foram considerados isotrópicos, homogêneos e linearmente elásticos e a análise numérica foi realizada no ANSYS Workbench 10.0 para obtenção da máxima tensão principal (MAX) após aplicação de força de tração de 0,03 N perpendicular à superfície da RC. A base de todos os modelos foi fixada nos eixos x, y e z. RESULTADOS: A MAX foi maior para o sistema convencional. A presença da ramificação lateral aumentou a MAX na CH para o sistema convencional. Os TAGs modificaram a distribuição da MAX na camada de adesivo para o sistema autocondicionante. CONCLUSÃO: A CH para o sistema convencional apresentou maior MAX em comparação ao sistema autocondicionante. A presença das ramificações laterais do adesivo aumentaram a tensão na CH para o sistema convencional.
OBJECTIVE: The aim of this study was to evaluate the stress distribution in the hybrid layer varying the adhesive system (total each and self-etching systems) using three-dimensional finite element analysis (FE). METHODS: 4 FE models (M) were developed in Solidworks 2007: Mc - representation of a specimen of dentin (41x41x82 μm) restored with composite resin (RC), showing the adhesive layer, hybrid layer (HL), TAGs, peri-tubular dentin, intertubular dentin in order to simulate simulating the HL according to the total-etch adhesive system; Mr - similar to Mc, with lateral branches of the adhesive; Ma – similar to Mc, without TAGs and showing the smear plug in order to simulate the environment for the self-ethcing adhesive system; Mat – similar to Ma, with TAGs. The models were considered isotropic, homogeneous and linearly elastic and numerical analysis was performed in ANSYS Workbench 10.0 to obtain the maximum principal stress (MAX) after application of a tension force of 0.03N perpendicular to the surface of the RC. The botton of all models was fixed in x, y and z axis. RESULTS: The highest MAX in HL was observed in the total etching system. The lateral branches increased the MAX in HL. The TAGs had a little influence on the stress distribution in self-ethching system. CONCLUSION: The HL for the total-etch system showed MAX higher in comparison with the self-etch system. The presence of TAGs increased the MAX in the HL for the total-etch system.
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Anchieta, Rodolfo Bruniera [UNESP]. "Sistemas adesivos autocondicionantes: estudo micromecânico da interface de união através do método dos elementos finitos tridimensional." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/97368.
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anchieta_rb_me_araca.pdf: 7195179 bytes, checksum: 1c86045d84983285e3b0998f11288632 (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Introdução: Embora os sistemas adesivos autocondicionantes se caracterizem por desmineralizar e infiltrar a dentina simultaneamente, a presença de dentina alterada abaixo da camada híbrida tem sido reportada, sugerindo comportamento mecânico distinto. Proposição: Avaliar por meio do método dos elementos finitos tridimensional a influência da espessura da dentina parcialmente alterada no comportamento micromecânico de dois sistemas adesivos autocondicionantes. Materiais e Métodos: Foram elaborados 5 micro-modelos (M) simulando a interface dentina/adesivo (d/a) (82x41x41 μm), sendo: M1-representação da interface d/a baseada em sistema adesivo convencional de 2 passos; M2-representação de um sistema adesivo autocondicionante de 2 passos. Nos M3, M4 e M5 representação de um sistema adesivo autocondicionante de 1 passo, variando a espessura da camada de dentina parcialmente alterada em 0, 1,5 e 3 μm, respectivamente. Os modelos foram considerados isotrópicos, homogêneos e linearmente elásticos. A base de todos os modelos foi fixada nos eixos x, y e z, sendo aplicado um carregamento em tração (90º; 0,03 N) na face superior da resina composta. A análise numérica foi realizada para a obtenção da tensão principal máxima ( max). Resultados: o pico da max (MPa) foi encontrada no M5 (79,5), seguido do M4 (78,0) e do M3 (70). O topo dos tags foi o local mais solicitado em todos os modelos. Conclusão: O aumento da espessura da dentina parcialmente alterada aumentou a tensão na interface d/a; a ausência desta camada contribuiu para a menor concentração de tensão; o topo dos tags foi o local mais exigido na interface d/a.
Introduction: Although the self-etching adhesives are characterized by etching and infiltrating simultaneously the dentin, the presence of an altered dentin layer has been showed by literature, which might show specific mechanical behavior. Proposition: To evaluate through 3-D finite element analysis the influence of the partially altered dentin thickness on the micromechanical behavior of the self-etch adhesives. Materials and Methods: 5 micro-models (M) were developed for simulating the dentin/adhesive (d/a) interface (82x41x41 μm): M1-representation of the d/a interface based on 2 steps conventional adhesive system; M2-d/a interface based on 2 steps self-etch adhesive system M3, M4 and M5 – d/a interface based on all-in-one adhesive system, varying the thickness of the partially altered dentin (0, 1.5 and 3 μm, respectively). All the models were considered isotropic, homogeneous and lineally elastic. The bottom of all the models were constrained in the axes x, y and z. A tensile load (90o; 0.03N) was applied on the top of the composite resin. The numeric analysis was accomplished, being obtained the maximum principal stress ( max). Results: The pick of max (MPa) was found in M5 (79.5), followed by M4 (78.0) and M3 (70). The top of the resin tags was the most requested place in all models. Conclusion: The increase of the partially altered dentin thickness raised the max in the d/a interface; the absence of this layer contributed to the smallest tension concentration; the top of the tags showed higher stress concentration.
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Hosgor, Can. "Multiresolution Formation Preserving Path Planning In 3-d Virtual Environments." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613709/index.pdf.
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The complexity of the path finding and navigation problem increases when multiple agents
are involved and these agents have to maintain a predefined formation while moving on a
3-D terrain. In this thesis, a novel approach for multiresolution formation representation is
proposed, that allows hierarchical formations of arbitrary depth to be defined using different
referencing schemes. This formation representation approach is then utilized to find and
realize a collision free optimal path from an initial location to a goal location on a 3-D terrain,
while preserving the formation. The proposed metod first employs a terrain analysis technique
that constructs a weighted search graph from height-map data. The graph is used by an off-line
search algorithm to find the shortest path. The path is realized by an on-line planner, which
guides the formation along the path while avoiding collisions and maintaining the formation.
The methods proposed here are easily adaptable to several application areas, especially to real
time strategy games and military simulations.
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Khan, Imran. "Hajj crowd management: Discovering superior performance with agent-based modeling and queueing theory." Arabian Journals of Business and Management Review, 2012. http://hdl.handle.net/1993/13698.
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The thesis investigates how Agent-Based Modeling and Simulation (ABMS) and Queueing Theory (QT) techniques help manage mass gathering (MG) crowds. The techniques are applied to Hajj MG, which is one of the most complex annual MG, with a focus on its challenging Tawaf ritual. The objective is to develop a Tawaf Decision Support System (DSS) to better understand Tawaf crowd dynamics and discover decisions that lead to superior performance. TawafSIM is an ABMS model in the DSS, which simulates macro-level Tawaf crowd dynamics through micro-level pilgrim modeling to explore the impact of crowd characteristics, facility layout, and management preferences on emergent crowd behaviours with respect to throughput, satisfaction, health, and safety. Whereas, TawafQT is a QT model in the DSS to explore the impact of pilgrim arrival rate and Tawaf throughput on expected arrival, departure, and waiting times along with average queue length in the Tawaf waiting area.
The thesis provides several contributions, including the following. First, it is the only Tawaf research to use a hybrid ABMS and QT approach. Second, TawafSIM is a comprehensive Tawaf simulator. It incorporates features for pilgrim characteristics, facility design, and management preferences. It calculates eight metrics for Tawaf performance, which includes one for throughput, three for satisfaction, one for health, and three for safety. It is the only Tawaf simulator to estimate satisfaction and spread of infectious disease. It conducts 42 simulation experiments in 12 categories. It generates observations for emergent, tipping point, expected, and counter intuitive behaviours. It recommends a default scenario as the best decision along with a small subset of alternative scenarios, which provide above average Tawaf performance. It generates a Tawaf Crowd Management Guide to better understand Tawaf crowd dynamics and how to pursue above average Tawaf performance under different conditions. Third, TawafQT is the only study of the Tawaf waiting area. It uses an accurate queueing model with finite source, single service, and PH type distribution, which is not only applicable to the Tawaf and other Hajj related queueing systems but also to any queueing system, which has finite population and single service characteristics.
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Teran, Villegas Oswaldo Ramon. "Emergent tendencies in multi-agent-based simulations using constraint-based methods to effect practical proofs over finite subsets of simulation outcomes." Thesis, Manchester Metropolitan University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343494.
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LIM, SANG-HOON. "SYNTHESIS OF A FIBER-REACTIVE CHITOSAN DERIVATIVE AND ITS APPLICATION TO COTTON FABRIC AS AN ANTIMICROBIAL FINISH AND A DYEING-IMPROVING AGENT." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-12272002-162031/.
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The purpose of this research has been to develop a textile finish based on chitosan that is a biopolymer. A fiber-reactive chitosan derivative was synthesized from chitosan with a low molecular weight and a high degree of deacetylation. The synthesis was composed of two steps. As a first step, a water-soluble chitosan derivative was prepared by introducing quaternary ammonium salt groups on the amino groups of chitosan. The derivative was further modified by introducing functional groups (acrylamidomethyl) on the primary alcohol groups of the chitosan backbone, which can form covalent bonds with cotton. The fiber-reactive chitosan derivative (NMA-HTCC) itself showed complete bacterial reduction against Staphylococcus aureus and Escherichia coli at the concentration of 10 ppm. The NMA-HTCC was applied to cotton fabrics by a pad-batch method in the presence of an alkaline catalyst. The 1% NMA-HTCC treated cotton showed 100% bacterial reduction against S. aureus. The fabric maintained over 99% of bacterial reduction even after 50 home launderings. The NMA-HTCC cotton was dyed with direct and reactive dyes without addition of salt. The color yield was higher than that of untreated cotton, which required a large amount salt for dyeing. The NMA-HTCC cotton showed better washfastness than untreated cotton, but the lightfastness was inferior to that of untreated cotton. The antimicrobial activity of the NMA-HTCC cotton was considerablely decreased after dyeing due to the blocking of the cationic groups of the NMA-HTCC by dye molecules.
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Mendonça, Rafael da Silva. "Plataforma didática para desenvolvimento de Sistemas Multiagente." Universidade Federal do Amazonas, 2016. http://tede.ufam.edu.br/handle/tede/5491.
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FAPEAM - Fundação de Amparo à Pesquisa do Estado do Amazonas
This work is the proposal of a didactic platform for the development and learning of intelligent agents applied to manufacturing. Furthermore, it is proposed a simulator for mechatronic agents aimed at reproducing the temporal behavior of a mechatronic hardware by defining a finite state machine. This platform has been validated by a real application and the Simulator by qualitative comparison with that application. The real system behavior and the simulated system behavior are close, so that the replacement of the simulated real machine is transparent to the rest of the system.
Este trabalho é a proposta de uma plataforma didática para o desenvolvimento e o aprendizado de agentes inteligentes aplicados à manufatura. Além disso, é proposto um Simulador para agentes mecatrônicos que visa a reprodução do comportamento temporal de um hardware mecatrônico através da definição de sua máquina de estados finita. Essa plataforma foi validada por uma aplicação real e o Simulador pela comparação qualitativa com essa aplicação. O comportamento do sistema real e do sistema simulado são próximos, de forma que a substituição da máquina simulada pela real é transparente para o restante do sistema.
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Ruben, Jochen [Verfasser]. "Ein Multi-Agenten-System zur verteilten p-adaptiven Finite-Elemente-Simulation am Beispiel der Baugrund-Tragwerk-Interaktion / Jochen Ruben." Aachen : Shaker, 2005. http://d-nb.info/1186588950/34.
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Anchieta, Rodolfo Bruniera. "Sistemas adesivos autocondicionantes : estudo micromecânico da interface de união através do método dos elementos finitos tridimensional /." Araçatuba : [s.n.], 2010. http://hdl.handle.net/11449/97368.
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Resumo: Introdução: Embora os sistemas adesivos autocondicionantes se caracterizem por desmineralizar e infiltrar a dentina simultaneamente, a presença de dentina alterada abaixo da camada híbrida tem sido reportada, sugerindo comportamento mecânico distinto. Proposição: Avaliar por meio do método dos elementos finitos tridimensional a influência da espessura da dentina parcialmente alterada no comportamento micromecânico de dois sistemas adesivos autocondicionantes. Materiais e Métodos: Foram elaborados 5 micro-modelos (M) simulando a interface dentina/adesivo (d/a) (82x41x41 μm), sendo: M1-representação da interface d/a baseada em sistema adesivo convencional de 2 passos; M2-representação de um sistema adesivo autocondicionante de 2 passos. Nos M3, M4 e M5 representação de um sistema adesivo autocondicionante de 1 passo, variando a espessura da camada de dentina parcialmente alterada em 0, 1,5 e 3 μm, respectivamente. Os modelos foram considerados isotrópicos, homogêneos e linearmente elásticos. A base de todos os modelos foi fixada nos eixos x, y e z, sendo aplicado um carregamento em tração (90º; 0,03 N) na face superior da resina composta. A análise numérica foi realizada para a obtenção da tensão principal máxima ( max). Resultados: o pico da max (MPa) foi encontrada no M5 (79,5), seguido do M4 (78,0) e do M3 (70). O topo dos tags foi o local mais solicitado em todos os modelos. Conclusão: O aumento da espessura da dentina parcialmente alterada aumentou a tensão na interface d/a; a ausência desta camada contribuiu para a menor concentração de tensão; o topo dos tags foi o local mais exigido na interface d/a.Abstract: Introduction: Although the self-etching adhesives are characterized by etching and infiltrating simultaneously the dentin, the presence of an altered dentin layer has been showed by literature, which might show specific mechanical behavior. Proposition: To evaluate through 3-D finite element analysis the influence of the partially altered dentin thickness on the micromechanical behavior of the self-etch adhesives. Materials and Methods: 5 micro-models (M) were developed for simulating the dentin/adhesive (d/a) interface (82x41x41 μm): M1-representation of the d/a interface based on 2 steps conventional adhesive system; M2-d/a interface based on 2 steps self-etch adhesive system M3, M4 and M5 - d/a interface based on all-in-one adhesive system, varying the thickness of the partially altered dentin (0, 1.5 and 3 μm, respectively). All the models were considered isotropic, homogeneous and lineally elastic. The bottom of all the models were constrained in the axes x, y and z. A tensile load (90o; 0.03N) was applied on the top of the composite resin. The numeric analysis was accomplished, being obtained the maximum principal stress ( max). Results: The pick of max (MPa) was found in M5 (79.5), followed by M4 (78.0) and M3 (70). The top of the resin tags was the most requested place in all models. Conclusion: The increase of the partially altered dentin thickness raised the max in the d/a interface; the absence of this layer contributed to the smallest tension concentration; the top of the tags showed higher stress concentration.
Orientador: Eduardo Passos Rocha
Coorientador: Renato Herman Sundfeld
Banca: Paulo Henrique dos Santos
Banca: André Figueiredo Reis
Mestre
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Andersson, Simon. "Evolution av värden i en sokastisk tillståndsmaskin : Kan evolution underlätta för att finna lämpliga värden åt en sokastisk tillståndsmaskin hos en agent?" Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8157.
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Evolution och tillståndsmaskiner är kända koncept inom både AI-forskning och spelindustrin. Tillståndsmaskiner har länge använts för att simulera artificella motståndare, samtidigt som evolution i många fall applicerats för att få agenter att själva upptäcka bra lösningar på problem. Arbetet använder sig av evolution för att undersöka om det går att evolvera fram bättre tillståndsövergångar i en stokastisk tillståndsmaskin än hos en fördefinierad tillståndsmaskin. Två homogena lag med två agenter vardera skapas, vilka tävlar på en arena där det går ut på att döda det andra laget först. Det ena laget delar en ständigt evolverande beteendemall medan det andra laget består av fördefinierade agenter, på så sätt att de har bedömts som duktiga på att spela spelet. De evolverande lagets framgång mäts i hur mycket hälsa de har kvar när en match är över. Utvärderingen visar en klar förbättring från 3% till 25% vinstchans hos en agent som startar med helt slumpade övergångsvärden och sedan evolverar dessa i 230 generationer emot en godtyckligt vald fördefinierad agent.
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Basmaci, Talita Awabdeh Maikel. "Den verkställande direktörens ersättning : En jämförelse mellan fastighets-, finans och läkemedelsbranschen." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-30412.
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Purpose: The study aims to show if there is a significant relationship between the CEOs recompense and the size of the company between the industries. The goal is to compare the size of a company with the variable that shows performance and which of them who has the strongest connection to the recompense. Method: The essay stands on a quantitative approach where secondary data has been gathered from the year of 2015 annual reports. The population includes all the Swedish companies in the real estate-, finance- and pharmaceutical industry that are listed on the stock exchange. Selection has been made on 30 of these companies, 10 in each industry. With the statistical analyses the methods that have been used are multiple regression model and correlation analysis. Results: The results show that the company that paid the highest recompense in the real estate industry was Kungsleden. The company in the finance industry was Kinnevik and in the pharmaceutical industry it was Pfizer. Conclusion: After analyzing the result the conclusion can be made that there is a significant relationship between the CEOs recompense and the size of the company only in the real estate industry. When comparing the variable that dictates the size of the company (net sales) and the performance variable (MVA), the conclusion that can be made is that MVA has a stronger connection to the CEOs total recompense in the pharmaceutical industry in relation to the other industries. Within the finance industry there was no significant relationship with the CEOs recompense and the selected variables.
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Tchoquessi-Diodjo, Madeleine Rita. "Amélioration de l'adhésion de revêtements épais sur acier : étude expérimentale et numérique." Thesis, Toulon, 2013. http://www.theses.fr/2013TOUL0010/document.
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La corrosion des canalisations métalliques pour le transport de gaz ou d’hydrocarbures est un problème critique qui peut avoir des répercussions financières et environnementales très importantes. Les revêtements polyoléfines tricouches sont largement utilisés pour préserver l’intégrité des structures. Ils sont constitués d’une sous couche mince époxy, d’une couche mince d’adhésif et d’une couche épaisse le plus souvent en polyéthylène. Ce système de revêtement bénéficie de très bonnes qualités d'adhérence. Néanmoins, des cas de décollements de ces revêtements à l’interface époxy/acier ont été constatés sur des pipelines en service depuis quelques années seulement, alors que la durée minimale de vie escomptée des tubes dans le sol est de quelques dizaines d’années. Ces décollements pourraient être dus à une dégradation progressive des liaisons interfaciales entre le primaire époxy et la surface métallique, associée à la présence de contraintes interfaciales importantes entre les différentes couches de l'assemblage. Cette étude vise alors d'une part à proposer des solutions permettant d’aboutir à la meilleure performance en vieillissement de la liaison adhésive, et d'autre part à quantifier les niveaux de contraintes au sein de la canalisation en acier revêtue depuis sa mise en œuvre, jusqu'à sa mise en service.Les liaisons interfaciales dépendant nécessairement de la préparation de surface de l’acier, des procédés de nettoyage ont été testés afin d’évaluer leur influence sur l’adhérence initiale et la durabilité des assemblages. Les préparations de surface permettent d'obtenir un degré de propreté et une rugosité. Ces deux éléments maximisent les forces de liaison et donc l'adhérence du revêtement. Le revêtement résiste alors mieux dans des environnements agressifs. Tous les procédés de nettoyage testés ont conduits à des niveaux de propreté équivalents du substrat en acier. Les essais effectués sur substrats polis miroir ont mis en évidence qu’une rugosité est nécessaire pour améliorer la durabilité des assemblages. La rugosité permet d'obtenir des adhérences supérieures à celles sur substrats polis miroir, de ralentir les effets du vieillissement humide et donc de prolonger la durée de vie du système. Il a été mis en évidence que les fortes rugosités étaient particulièrement bénéfiques pour les adhérences sèches. Par contre, au-delà d’une certaine rugosité, l’augmentation de la rugosité ne s’accompagne pas d’une amélioration significative de l’adhérence humide. Une étude sur l’apport des traitements de surface a aussi été menée. L’addition d’un traitement de surface a peu d’impact sur les adhérences initiales des assemblages, en comparaison avec une préparation de surface classique. Par contre les traitements de surfaces améliorent considérablement les adhérences humides, et donc la durabilité des assemblages. Notre travail prouve que le traitement aminosilane est un candidat potentiel en vue du remplacement du traitement toxique de chromatation, référence en matière de traitements de surface dans l'industrie des pipelines et dont l'utilisation sera interdite dans un futur proche compte tenu de l'évolution de la réglementation. Dans de bonnes conditions d'application et associé avec des primaires époxy appropriés, les adhérences sèches et humides obtenues avec les silanes sont comparables (voire supérieures) à celles de la chromatation.Par ailleurs, la modélisation par éléments finis du système tricouches a permis de préciser les niveaux de contraintes aux interfaces résultant de la mise en œuvre et de prévoir leur évolution au cours du temps et du vieillissement humideExternal Corrosion can weaken underground steel pipelines and render them unsafe for transporting oil or gas. Premature damage of this network could lead to dramatic financial and environmental consequences. Three layers polyolefin coatings composed by a fusion bonded epoxy, a modified polyolefin adhesive and a thick polyolefin topcoat, are the most widely systems used to preserve the structure integrity. This protective coating system presents excellent adhesion. Nevertheless, in some specific cases, loss of adhesion has been observed at steel/epoxy interface on operating pipelines on shorter period than their expected lifetime of about fifty years. This disbonding can be assigned to the progressive degradation of interfacial bonds between the epoxy primer and the metallic surface combined to substantial interfacial stresses between the different layers of the assembly. This study thus aims both to provide solutions to achieve the best ageing performance of the adhesive bond, and secondly to quantify the stress levels in a coated steel pipe since coating manufacturing to pipeline commissioning.Given that interfacial bonds depend necessarily on steel surface preparation, cleaning methods were compared to appraise their influence on assemblies dry and wet adhesion. Surface preparations allow to achieve a level of cleanness and to create a surface roughness. These two elements maximize binding forces and therefore the adhesion of the coating. The coating is thus more resistant to aggressive environments. All cleaning process have led to equivalent level of cleanness of steel substrate. Experiments carried out on mirror polished steel substrates highlighted that a surface roughness is necessary to improve joints durability. Roughness allows to obtain higher adhesion compared to mirror polished steel substrates, slows the effects of humid ageing and thus contributes to extend the durability of the system. It has been demonstrated that a high roughness is particularly beneficial for dry adhesion. By cons, beyond a certain roughness, increasing the surface roughness does not lead to significant improvement of wet adhesion. The benefits of surface treatments were also investigated. The addition of a surface treatment has little impact on dry adhesion in comparison with a conventional surface preparation. However, surface treatments substantially enhance the adhesion strength in wet stage, and therefore increase the durability of the assemblies. We also demonstrate that aminosilane surface treatments are competitive alternatives to traditional chromate conversion, which is the surface treatment of reference in pipeline industry, and whose use will be prohibited in a near future considering changes in legislation. Under good conditions of application and associated with appropriate fusion bonded epoxy, dry and wet adhesion obtained with silane surface treatments are comparable (or even higher ) than those obtained with chromate surface treatments.Furthermore, finite element modeling has allowed to specify interfacial stresses levels inside the assembly resulting from coating's manufacturing process and to predict their evolution over time and during wet ageing
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Martin, Júnior Manoel. "Sistemas adesivos convencional e autocondicionante : análise micromecânica tridimensional da interface dentina-adesivo /." Araçatuba : [s.n.], 2008. http://hdl.handle.net/11449/105580.
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Orientador: Eduardo Passos RochaBanca: Marco Antonio Luersen
Banca: Renato Herman Sundfeld
Banca: Marcelo Giannini
Banca: Washington Rodrigues Camargo
Resumo: OBJETIVO: Avaliar a distribuição das tensões na interface dentina-adesivo variando o sistema adesivo, convencional e autocondicionante, através do método dos elementos finitos tridimensional. MATERIAL E MÉTODO: Foram elaborados 4 modelos no programa Solidworks 2007, sendo: Mc - representação de um espécime em dentina (41x41x82 μm) restaurado com resina composta (RC), apresentando camada de adesivo, camada híbrida (CH), TAGs, dentina peri-tubular, dentina intertubular parcialmente desmineralizada, dentina intertubular e prolongamento odontoblástico, simulando a formação da CH segundo o sistema adesivo convencional; Mr - idêntico ao Mc, com ramificações laterais do infiltrado do adesivo; Ma - idêntico ao Mc, sem TAGs, e com "smear plug", simulando o sistema adesivo autocondicionante; Mat - idêntico ao Ma, com TAGs. Os modelos foram considerados isotrópicos, homogêneos e linearmente elásticos e a análise numérica foi realizada no ANSYS Workbench 10.0 para obtenção da máxima tensão principal (MAX) após aplicação de força de tração de 0,03 N perpendicular à superfície da RC. A base de todos os modelos foi fixada nos eixos x, y e z. RESULTADOS: A MAX foi maior para o sistema convencional. A presença da ramificação lateral aumentou a MAX na CH para o sistema convencional. Os TAGs modificaram a distribuição da MAX na camada de adesivo para o sistema autocondicionante. CONCLUSÃO: A CH para o sistema convencional apresentou maior MAX em comparação ao sistema autocondicionante. A presença das ramificações laterais do adesivo aumentaram a tensão na CH para o sistema convencional.
Abstract: OBJECTIVE: The aim of this study was to evaluate the stress distribution in the hybrid layer varying the adhesive system (total each and self-etching systems) using three-dimensional finite element analysis (FE). METHODS: 4 FE models (M) were developed in Solidworks 2007: Mc - representation of a specimen of dentin (41x41x82 μm) restored with composite resin (RC), showing the adhesive layer, hybrid layer (HL), TAGs, peri-tubular dentin, intertubular dentin in order to simulate simulating the HL according to the total-etch adhesive system; Mr - similar to Mc, with lateral branches of the adhesive; Ma - similar to Mc, without TAGs and showing the "smear plug" in order to simulate the environment for the self-ethcing adhesive system; Mat - similar to Ma, with TAGs. The models were considered isotropic, homogeneous and linearly elastic and numerical analysis was performed in ANSYS Workbench 10.0 to obtain the maximum principal stress (MAX) after application of a tension force of 0.03N perpendicular to the surface of the RC. The botton of all models was fixed in x, y and z axis. RESULTS: The highest MAX in HL was observed in the total etching system. The lateral branches increased the MAX in HL. The TAGs had a little influence on the stress distribution in self-ethching system. CONCLUSION: The HL for the total-etch system showed MAX higher in comparison with the self-etch system. The presence of TAGs increased the MAX in the HL for the total-etch system.
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McAllan, William John. "Minded and able? : a realistic evaluation of the readiness of registered social workers in one agency to access and use research findings." Thesis, Glasgow Caledonian University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571602.
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There is convincing evidence from the literature that social workers are generally not well informed by research findings. The existing understandings of the barriers to instrumental research use are predominately generated from academic perspectives and there are few empirical studies which explore research use in the real and complex world of the social work practice environment. Theoretical knowledge is advanced through this study's development of the concept of research-mindedness as a pre- stage to research-informed practice and the identification of the mechanisms which might trigger the outcome of research-mindedness. Realistic Evaluation (Pawson & Tilley, 1997) was used to determine the mechanisms which might trigger the outcome of research-mindedness i.e. what works for whom, in what context, and why. A two phase mixed methods explanatory sequential design was applied in which primary quantitative data was first collected by a questionnaire (n= 147) and then used to guide the collection of explanatory data from focus groups. The sample was stratified by agency role which enabled the identification and analysis of particular themes from the perspectives of managers, supervisors and practitioners. Key findings were the emergence of new interpretations of the established paradigms relating to the discretionary nature of research acquisition effort, the actions of psychological contracts and conflicting views about the legitimacy of autonomy between managers, supervisors and practitioners. The emergent theory of research- mindedness was applied to the survey data to find that 46.9% of respondents had reported 'very confident' or 'quite confident' in their critical appraisal skills despite limited evidence of research-mindedness in their survey returns. This research generates new understanding of a complex area at the heart of Government policy. The study is of potential benefit to social workers who can use the method to determine their own research-mindedness. It is also of potential value to the social work profession by developing new knowledge about research practice which challenges the previous theories about the mechanisms which trigger research- mindedness. In these ways the study supports better outcomes for social work service users and carers, an aim which is at the core of all social work practice.