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Rocha, Andreia Patricia Ferreira da Silva. "OpenSim: um recurso didático no ensino do desenho." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14670.
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Mestrado em Ensino de Artes Visuais no 3º Ciclo do Ensino Básico e no Ensino Secundário<br>O relatório que aqui se apresenta é o resultado da investigação desenvolvida
no âmbito do mestrado em ensino de artes visuais durante a Prática de Ensino
Supervisionada, na disciplina de Desenho A, numa Escola de Ensino Artístico
Especializado no Porto.
A disciplina de Desenho A, nesta escola, ocupa um papel central, sendo uma
disciplina comum a todos os cursos.
Face às dificuldades apresentadas nos exercícios diagnósticos realizados
pelos alunos no início da investigação e em virtude da presença da escola no
mundo virtual OpenSim, estabeleceu-se a utilização desta plataforma como um
recurso didático com interesse pedagógico.
Tendo por base o enquadramento teórico que o fundamenta, este estudo teve
como finalidade analisar e compreender as potencialidades educativas do
mundo virtual OpenSim para a compreensão da perspetiva e da sua
representação, no âmbito da disciplina de Desenho.
A análise dos resultados obtidos indica que a utilização do OpenSim contribuiu
positivamente para o processo do ensino e da aprendizagem do desenho.<br>This report is the result of the research conducted for the MA in Education in
Visual Arts, under the Drawing A course subject supervised teaching practice,
in a school of art education in Porto.
In this school, Drawing A is a pivotal subject which is common to all courses.
Due to student difficulties in diagnostic exercises at the beginning of research,
and since the school had a presence in the OpenSim virtual world, this platform
was established as a teaching resource with a pedagogical interest.
Set against the theoretical framework underlying it, this study aimed at
analysing and understanding the educational potential of the OpenSim virtual
world as a means to understand perspective and its representation within the
Drawing A course subject.
The analysis of the results obtained indicates that the use of OpenSim has
contributed positively for the process of teaching and learning how to draw.
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Guled, Pavan. "Analysis of the physical interaction between Human and Robot via OpenSim software." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Find full textAbstract:
The purpose of this thesis is to analyse the Physical Human-Robot Interaction (PHRI) which is an important extension of traditional HRI work. This work of analysis helps in understanding the effects on the upper limb of the human musculoskeletal system when human user interacts with the robotic device. This is concerned for various applicational interests, like in the field of health care, industrial applications, military, sport science and many more.
We developed a CAD model of an exoskeleton in SolidWorks to satisfy all the properties required. The designed upper limb exoskeleton has been implemented within the simulating software OpenSim via the platform Notepad++ using xml language. This framework has been used to simulate and analyse the effects at muscular level when the exoskeleton is coupled with the model of the upper limb of the human body for a desired elbow flexion and extension movements.
Then the results i.e. force generated by muscles with and without exoskeleton contribution are plotted and compared. The results of the simulations show that, wearing the exoskeleton, the forces exerted by the muscles decrease significantly.
This thesis is only the starting point of a wide range of possible future works. Aiming at the use of exact controller, optimization technique, cost estimation possibilities applying to real word model and reaching the people in need.
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Oliveira, Simão Pedro Resende de. "Using 3D virtual worlds in new educational contexts: IT College in OpenSim." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/1220.
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Mestrado em Comunicação Multimédia<br>As instituições europeias de Ensino Superior, bem como cada agente envolvido nos processos formais de aprendizagem do Ensino Superior, estão actualmente a experimentar profundas mudanças sob as directivas do Processo de Bolonha.
Ao mesmo tempo, as instituições recebem uma nova geração de estudantes, com fortes competências tecnológicas, sendo necessário a estas a compreensão de quais as ferramentas a integrar no currículo educacional, de forma a corresponder às necessidades e expectativas dos seus estudantes.
Esta reforma educativa toma lugar enquanto a World Wide Web evolui para a “Web 2.0”: um conjunto de ferramentas tecnológicas e serviços impregnados de princípios como a colaboração, a faceta social e a centralização no utilizador. E novas tendências na Web começam a aparecer, através de paradigmas como os Mundos Virtuais 3D.
Esta investigação procura primeiramente compreender como desenhar e construir espaços e ferramentas dentro do Mundo Virtual 3D OpenSim que sejam adequadas às novas realidades educativas e sociais; e adicionalmente, procura que este conhecimento seja usado na criação de uma presença no OpenSim para o Eesti Infotehnoloogia Kolledž, uma instituição de Ensino Superior estoniana. As características do IT Kolledž serão obviamente consideradas durante o processo de investigação.
ABSTRACT: European Higher Education institutions, as well as every individual involved in higher education formal learning processes, are currently undergoing profound changes under the guidelines of the Bologna Process.
Simultaneously, institutions face a new wave of technological-savvy students and are demanded to understand which tools to integrate in educational curricula in order to adapt to their expectations and needs.
This whole educational reform takes place while the World Wide Web evolves into "Web 2.0": a set of technological tools and services impregnated with collaborative, social and user-centered attitudes. And new Web tendencies start to unfold, comprising paradigms such as Virtual 3D Worlds.
This research aims firstly to understand how to design and build spaces and tools inside 3D virtual world OpenSim that will be adequate in new educational and social realities; and secondly, to use this knowledge to create an OpenSim presence for Eesti Infotehnoloogia Kolledž, an Estonian higher education institution. IT Kolledž's characteristics will be obviously considered during the research process.
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Müller, Maria, Lars Schlenker, and Moritz Biehl. "Play real – Kollaboratives Mock-Trial-Training in der OpenSim-basierten Virtual Learning World." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-126071.
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Der vorliegende Beitrag setzt sich mit den Möglichkeiten problemorientierten Lernens in kollaborativen virtuellen Umgebungen am Beispiel eines Mock-Trial-Trainings in der OpenSim-basierten Virtual Learning World auseinander. Ausgangspunkt der Auseinandersetzung stellen die Motivation des Einsatzes virtueller Trainings und grundsätzliche Handlungsangebote kollaborativer virtueller Umgebungen einschließlich ihrer Potentiale aus bildungstheoretischer Perspektive dar. Bestehende Mehrwerte und Herausforderungen beim Einsatz virtueller Trainingsumgebungen werden anschließend anhand einer empirischen Untersuchung, die im Rahmen der Entwicklung eines Mock-Trial-Trainings durchgeführt wurde, aufgezeigt und diskutiert.
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Chang, Jing. "Evaluation des risques de troubles musculo-squelettiques liés au travail basée sur OpenSim." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0042/document.
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Les troubles musculo-squelettiques liés au travail causent des maladies physiques et mentales chez les travailleurs, réduisent leur productivité et causent de grandes pertes aux industries et à la société. Cette thèse porte sur l'évaluation du risque physique de troubles musculo-squelettiques liés au travail, pour laquelle quatre points clés sont identifiés : la mesure de la charge de travail, l'évaluation de l'effet de l'accumulation de la charge de travail, la quantification des caractéristiques individuelles et l'intégration de l'évaluation des risques dans les outils de modélisation numérique humaine. Dans l'état de l'art, les études épidémiologiques des désordres musculo-squelettiques et les méthodes actuelles utilisées pour l'évaluation des risques physiques sont présentées, ainsi que les études concernant les quatre points clés. La deuxième partie présente une étude expérimentale portant sur 17 sujets afin d'explorer un nouvel indicateur de la fatigue musculaire avec EMG de surface. Dans la partie suivante, des développements sont faits pour intégrer un modèle de fatigue musculaire dans OpenSim, un logiciel de modélisation humaine numérique, avec lequel la diminution de capacité de chaque muscle est prévisible pour une tâche donnée. Les valeurs prévues peuvent s'appliquer à l'évaluation des risques physiques. La quatrième partie présente le travail de construction d'un modèle musculosquelettique à chaîne complète dans OpenSim, étant donné qu'aucun modèle actuel ne couvre les muscles du torse et tous les membres. Une attention particulière est portée à la méthode utilisée par OpenSim pour adapter les propriétés inertielles du modèle aux individus. Les erreurs de la méthode sont évaluées à l'aide des données de référence provenant du scanner 3D du corps entier. Dans la dernière partie, le nouveau modèle de la chaîne complète est appliqué à l'analyse de la posture d'une tâche de perçage en hauteur. L'activité musculaire varie en fonction des postures, ce qui est suggéré comme indicateur des charges posturales<br>Work-related musculoskeletal disorders cause physical and mental illnesses in workers, reduce their productivity and cause great losses to industries and society. This thesis focuses on the assessment of the physical risk of work-related musculoskeletal disorders in industry, for which four key points are identified: measuring workloads, assessing the effect of workload accumulation, quantifying individual characteristics and integrating the risk assessment into digital human modeling tools. In the state of the art, the epidemiologic studies of musculoskeletal disoders and the current methods used for its physical risk assessment are reviewed, as well as the studies concerning the four key points. The second part presents an experimental study involving 17 subjects to explore a new indicator to muscle fatigue with surface EMG. In the next part, efforts are made to integrate a muscle fatigue model into OpenSim, a digital human modeling software, with which the capacity decrease of each muscle is predictable for a given task. The predicted values could be applicable to the physical risk assessment. The fourth part introduce the work to build up a Fullchain musculoskeletal model in OpenSim in view that no current model covers muscles of the torso and all the limbs. Special attention is paid to the method used by OpenSim to adapt the model inertial properties to individuals. Errors of the method is evaluated with reference data coming from the whole-body 3D scan. In the last part, the newly built Full-chain model is applied on the posture analysis of an overhead drilling task. The muscle activition varies as a function of postures, which is suggested as the indicator of posture loads
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Holm, Malin, Christoffer Roepstorff, and Martin Svedberg. "Validering av Inertial Measurment Units som insamlare av data för drivande av OpenSim-modell." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175937.
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The purpose of this paper is to investigate the possibility of replacing data from highspeed filming (Qualisys motion capture) with data from Inertial Measurement Units (X-io technologies), when used to run a model of torso and pelvis in OpenSim. Qualisys motion capture data is used as the golden standard to validate the result visually and with Bland-Altman plots. In order to obtain comparable data experiments are conducted where both methods of collecting data are used simultaneously. Data from the IMU's then need to be processed in Matlab before it can be used to run the OpenSim modell. Several Matlab programs rotate the IMU data to a static reference frame, filter and integrate it, then create viritual markers that correspond to Qualisys' optical markers. The conclusion is that using IMU as a method for collecting data can replace Qualisys in some applications, but not in ones that require high precision. However, this paper only begins the examination of IMU's and there are most likely improvements to be made.
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Wash, Bradley Robert. "Stationary Exercise Bicycle Instrumentation and Verification of OpenSim Pelvic Residual Loads in Seated Cycling." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2015.
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The study of cycling biomechanics typically requires measurement of pedal loads through force transducer instrumentation. However, analysis of seated cycling often necessitates the additional measurement of the loads exerted on the rider by the seat and handlebars. A stationary exercise bicycle was instrumented with two commercial six-axis force transducers at both the seat and handlebar locations via a custom designed mounting system. The system was tested by applying known forces and moments to the fixtures and proved capable of accurately measuring the loads. Additional data collected from cycling tests were compared to values from the literature to add supporting evidence to the validity of the system.
The instrumented stationary bicycle was further used to study the accuracy of modeling seated cycling in OpenSim. Five participants cycled at a moderate resistance level for three trials. Force and moment data were collected by seat, handlebar, and pedal load cells, while kinematic data were collected by an optical motion capture system. Participant data were analyzed with the OpenSim residual reduction algorithm (RRA) tool excluding seat and handlebar loads. The RRA pelvic residual was then compared to an experimentally determined handlebar and seat equivalent (HBSE) calculated from respective load cell data. Graphical comparisons of the RRA and HBSE results showed strong correlations in Anterior-Posterior (A-P) and Superior-Inferior (S-I) force directions and to a lesser degree, Medial-Lateral (M-L) force and S-I moment directions. M-L and A-P moment plots showed the least correlation between RRA and HBSE. Statistical comparisons showed RRA errors likely within 5.2% body weight (BW) for forces and 2.4% BW*height for moments. Considering the average participant height and weight of 167.7 cm and 63.6 kg, respectively, recommended error ranges for RRA are roughly ±4.0% BW for forces and ±7.2% BW*height for moments. This indicates that the OpenSim RRA tool can be used for cycling analysis.
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Pottinger, Megan V. "Inverse Dynamic Analysis of ACL Reconstructed Knee Joint Biomechanics During Gait and Cycling Using OpenSim." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1988.
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ACL (anterior cruciate ligament) injuries of the knee joint alter biomechanics and may cause abnormal loading conditions that place patients at a higher risk of developing osteoarthritis (OA). There are multiple types of ACL reconstruction (ACLR), but all types aim to restore anterior tibial translation and internal tibial rotation following surgery. Analyzing knee joint contact loads provide insight into the loading conditions following ACLR that may contribute to the long-term development of OA. Ten ACLR subjects, who underwent the same reconstruction, performed gait and cycling experiments while kinematic and kinetic data were collected. Inverse dynamic analyses were performed on processed data using OpenSim to calculate reconstructed and contralateral knee joint contact loads which were then compared between gait and cycling at both moderate and high resistances. Significant differences were found between gait and cycling at either resistance for tibiofemoral (TF) compressive, anterior shear, lateral shear forces, and internal abduction and internal rotation moments for both ACLR and contralateral knees. Anterior shear force was largest for cycling at a high resistance, however, since the ACL provides a posterior restoring force and is more engaged at low flexion angles, adjusting for flexion angles when measuring AP shear forces should be considered. Overall, the calculated loading conditions suggest cycling provided better joint stability by limiting anterior tibial translation and internal tibial rotation compared to gait. The results suggest cycling is a better rehabilitation exercise to promote graft healing and limit abnormal loading conditions that increase the risk of developing OA.
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Toni, Amorim de Oliveira [UNESP]. "Desenvolvimento de uma metodologia de ensino, baseada na teoria das inteligências múltiplas viabilizada pelo uso de tecnologias de informação e comunicação." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138329.
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Previous issue date: 2016-04-25<br>Os laboratórios virtuais são ambientes de desenvolvimento interativos para criar e conduzir experimentos simulados e controlados cujos resultados dependem dos dados de entrada definidos pelo usuário. Neste trabalho descreve-se o desenvolvimento de uma metodologia de aprendizagem, baseada na teoria das inteligências múltiplas, aplicada em um laboratório virtual em ambiente 3D utilizando o software OpenSim, integrado ao MOODLE. Neste trabalho descreve-se também o desenvolvimento de objetos de aprendizagem denominados Virtualab e Karnavit que integram o laboratório virtual. O objeto de aprendizagem Virtualab tem por objetivo proporcionar apoio pedagógico, por meio de textos, vídeos e imagens on line, a professores e alunos que utilizam o laboratório virtual desenvolvido neste trabalho. O objeto de aprendiza- gem Karnavit é voltado ao ensino de mapa de Karnaught. As atividades propostas para testes no ambiente 3D foram desenvolvidas com base na teoria das inteligências múltiplas combinadas com tecnologias de informação e comunicação (TIC). A possibilidade de associar a aplicação da Teoria das Inteligências Múltiplas as TICs tem por objetivo possibilitar uma maior abrangência à Teoria das Inteligências Múltiplas, especificamente no campo da educação, a partir da disponibilização de ferramentas que auxiliam no estímulo de uma ou mais inteligências múltiplas. Neste trabalho também são apresentados e discutidos, no capítulo 7, os resultados obtidos na utilização e testes do laboratório, por alunos da Unesp, Unemat, Fatec, Unorp e Unirp. Também são apresentadas no capitulo 8 as conclusões desta pesquisa.<br>Virtual laboratory are interactive development environments to create and conduct simulation experiments and controlled the results depend on the user-defined input data. This work describes the development of a methodology of learning, based on the theory of multiple in telligences, applied in a virtual laboratory in 3D environment using the software OpenSim, integrated with Moodle. This work also describes the developmentcalled learning objects and Virtualab Karnavit comprising the virtual laboratory. The learning object Virtualab aims to provide educational support through text, video and images on line, teachers and students using the virtual laboratory developed in this work. The Karnavit learning object is returned to the Karnaught map teaching. The activities proposed for testing in the 3D environment have been developed based on the theory of multiple intelligences combined with information and com- munication technologies (ICT). The possibility of involving the application of the Theory of Multiple Intelligences ICT aims to allow greater scope to the Theory of Multiple Intelligences, specifically in the field of education, from the availability of tools that help to stimulate one or more multiple intelligences. This paper also presented and discussed in Chapter 7, the results obtained in use and lab tests for students of Unesp, Unemat, Fatec, UNORP and Unirp. They are also presented in chapter 8 the findings of this research.
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Toni, Amorim de Oliveira. "Desenvolvimento de uma metodologia de ensino, baseada na teoria das inteligências múltiplas viabilizada pelo uso de tecnologias de informação e comunicação /." Ilha Solteira, 2016. http://hdl.handle.net/11449/138329.
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Orientador: Alexandre Cesar Rodrigues da Silva<br>Resumo: Os laboratórios virtuais são ambientes de desenvolvimento interativos para criar e conduzir experimentos simulados e controlados cujos resultados dependem dos dados de entrada definidos pelo usuário. Neste trabalho descreve-se o desenvolvimento de uma metodologia de aprendizagem, baseada na teoria das inteligências múltiplas, aplicada em um laboratório virtual em ambiente 3D utilizando o software OpenSim, integrado ao MOODLE. Neste trabalho descreve-se também o desenvolvimento de objetos de aprendizagem denominados Virtualab e Karnavit que integram o laboratório virtual. O objeto de aprendizagem Virtualab tem por objetivo proporcionar apoio pedagógico, por meio de textos, vídeos e imagens on line, a professores e alunos que utilizam o laboratório virtual desenvolvido neste trabalho. O objeto de aprendiza- gem Karnavit é voltado ao ensino de mapa de Karnaught. As atividades propostas para testes no ambiente 3D foram desenvolvidas com base na teoria das inteligências múltiplas combinadas com tecnologias de informação e comunicação (TIC). A possibilidade de associar a aplicação da Teoria das Inteligências Múltiplas as TICs tem por objetivo possibilitar uma maior abrangência à Teoria das Inteligências Múltiplas, especificamente no campo da educação, a partir da disponibilização de ferramentas que auxiliam no estímulo de uma ou mais inteligências múltiplas. Neste trabalho também são apresentados e discutidos, no capítulo 7, os resultados obtidos na utilização e testes do laboratór... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: Virtual laboratory are interactive development environments to create and conduct simulation experiments and controlled the results depend on the user-defined input data. This work describes the development of a methodology of learning, based on the theory of multiple in telligences, applied in a virtual laboratory in 3D environment using the software OpenSim, integrated with Moodle. This work also describes the developmentcalled learning objects and Virtualab Karnavit comprising the virtual laboratory. The learning object Virtualab aims to provide educational support through text, video and images on line, teachers and students using the virtual laboratory developed in this work. The Karnavit learning object is returned to the Karnaught map teaching. The activities proposed for testing in the 3D environment have been developed based on the theory of multiple intelligences combined with information and com- munication technologies (ICT). The possibility of involving the application of the Theory of Multiple Intelligences ICT aims to allow greater scope to the Theory of Multiple Intelligences, specifically in the field of education, from the availability of tools that help to stimulate one or more multiple intelligences. This paper also presented and discussed in Chapter 7, the results obtained in use and lab tests for students of Unesp, Unemat, Fatec, UNORP and Unirp. They are also presented in chapter 8 the findings of this research.<br>Doutor
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Stetz, Eric J. "Simulation of Squat Exercise Effectiveness Utilizing a Passive Resistive Exoskeleton in Zero Gravity." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1460729748.
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Creps, Justin Michael. "An Investigation of Simulated Core Muscle Activation during Running and its Effect on Knee Loading and Lower Extremity Muscle Activation Using OpenSim." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397696075.
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Silva, Tarcila Gesteira da. "JOGOS SÉRIOS EM MUNDOS VIRTUAIS: UMA ABORDAGEM PARA O ENSINO-APRENDIZAGEM DE TESTE DE SOFTWARE." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/5398.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This work presents an approach of game-based learning using a serious game called
Software Testing Team Game. It is a three-dimensional multiplayer game developed in the
virtual world OpenSim. This game simulates the software testing division of a software
development company. It aims to provide knowledge related to software testing strategies,
motivate students, and encourage skills such as communication and problem solving. The
main difference between this game and others is its integration with the Learning
Management System Moodle, which allows teacher to edit game challenges throughout each
of the levels, using the Questionnaire tool, so that the game adapts to different undergraduate
computing curricula. The game also enables students to export test cases created by them in
the game to the test management tool TestLink, in order that they are given the opportunity to
interact with a tool used by professionals and also to directly apply the knowledge acquired.
The assessment of the game was performed in a class of Computer Engineering undergraduate
students in the Software Engineering Discipline. This assessment showed positive results,
considering that learners succeed to achieve learning objectives. Students enjoyed playing the
game more than learning in a traditional way, which in this study corresponds to a list of
exercises. So, we conclude that the use of the game can collaborate on software testing
education. These positive results got in the assessment motivate other experiments.<br>Este trabalho apresenta uma abordagem de aprendizagem baseada em jogos utilizando
o jogo sério denominado Jogo da Equipe de Teste de Software (JETS), que é um jogo em três
dimensões, multiplayer e foi desenvolvido no mundo virtual OpenSim. Esse jogo simula o
setor de Teste de Software de uma empresa de desenvolvimento de sistemas e visa a
proporcionar conhecimentos relacionados com Estratégias de Teste de Software, motivar os
estudantes e estimular habilidades como comunicação e resolução de problemas. O principal
diferencial do JETS é sua integração com o Ambiente Virtual de Ensino-Aprendizagem
(AVEA) Moodle, que permite ao professor editar os desafios das fases por meio da
ferramenta questionário, de modo que o jogo se adapte aos diferentes currículos dos cursos de
graduação em computação. O JETS também permite a exportação dos casos de teste criados
no jogo para a ferramenta de gerenciamento de Teste de Software TestLink, proporcionando
aos estudantes o contato com uma ferramenta utilizada por profissionais e a aplicação direta
dos conhecimentos adquiridos. A avaliação do JETS foi realizada em uma turma do curso de
Engenharia da Computação na disciplina de Engenharia de Software. Essa avaliação teve
resultados qualitativos muito positivos, pois, segundo os próprios estudantes, os objetivos de
aprendizagem foram atingidos. Além disso, os estudantes relataram, em sua maioria, gostar de
jogar o JETS e disseram, ainda, preferir esse tipo de atividade (jogo sério) à tradicional
neste trabalho, representada por uma lista de exercícios. Portanto, foi possível perceber que a
utilização do JETS pode ser uma alternativa promissora no processo de ensino-aprendizagem
do conteúdo de Teste de Software. De modo que os resultados positivos obtidos na avaliação
do JETS incentivam a realização de outros experimentos.
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Brodt, Guilherme Auler. "Diferenças na estimativa do torque muscular máximo de extensão de joelho utilizando parâmetros da literatura e parâmetros mensurados diretamente de indivíduos com mais de 55 anos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/104854.
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Contextualização: Uma das formas de conhecimento da função muscular se dá por meio de modelos biomecânicos que utilizam parâmetros como área de secção transversa fisiológica (ASTF), comprimento de fascículo e ângulo de penação para a mensuração da força isométrica máxima dos músculos. Os modelos biomecânicos normalmente empregam arquitetura de cadáveres e ignoram as características específicas da população estudada. Por esta razão, podem ser imprecisos na estimativa. Objetivo: Comparar o torque isométrico máximo de extensão de joelho de mulheres com mais de 55 anos com a estimativa de torque utilizando modelo biomecânico, utilizando parâmetros de cadáveres e utilizando parâmetros musculares mensurados diretamente. Metodologia: Quinze voluntárias com idade superior a 55 anos realizaram contrações voluntárias máximas isométricas (CVMI) de extensão de joelho em quatro ângulos (15°, 45°, 75° e 105°). Foram coletadas imagens de ultrassonografia de ASTF, comprimento de fascículo e ângulo de penação dos músculos do quadríceps. Esses parâmetros foram utilizados no modelo de Arnold et al. (2010) para estimar o torque individual das voluntárias nas mesmas condições da CVMI.. Os resultados de torque experimental, torque estimado individual (arquitetura individual) e torque estimado genérico (arquitetura dos cadáveres) foram comparados por meio de ANOVA de Friedman (α<0,05) e desdobramento post-hoc de Wilcoxon, índice de significância corrigido de α<0,0167 foi adotado após correção de Bonferroni. Além disso, foi realizada a análise gráfica de Bland-Altman (1986), regressão linear, índice de correlação intraclasse (ICC) e erro RMS para identificar qual técnica se assemelha mais ao torque experimental. Resultados e Discussão: O torque estimado individualmente previu corretamente o torque experimental nos ângulos de 45°, 75° e 105°. O torque estimado genérico previu corretamente o torque experimental nos ângulos 75° e 105°. Ambas as estimativas apresentaram tendências de superestimar os valores experimentais. Sendo que o torque estimado individual apresentou menor erro RMS e menor ICC. Após a correção da distância perpendicular muscular utilizada no modelo pela apresentada por Krevolin, Pandy e Pearce (2004) para mulheres, o pico do torque estimado individualmente apresentou-se no mesmo ângulo do torque coletado (75°). Conclusão: A estimativa com dados de arquitetura individualizados aumenta o grau acerto da técnica em um dos ângulos coletados, entretanto, a correlação entre os dados experimentais e aqueles oriundos do modelo individualizado não foi maior que aquela obtida entre os dados experimentais e os dados oriundos do modelo genérico.<br>Background: One way to know the muscle function is by biomechanical models that use parameters such as physiological cross-sectional area (PCSA) , fascicle length and penation angle for the estimation maximum isometric muscle force. Biomechanical models typically employ generic architecture parameters from cadaveric studies and ignore the specific characteristics of the studied population. For this reason, the estimation may be inaccurate. Objective: Compare the maximum isometric knee extension moment in women over 55 years with the estimated moment using a biomechanical model, using: (1) muscle parameters from cadaveric studies and (2) muscle parameters measured directly. Methods: Fifteen volunteers aged over 55 years did maximum isometric voluntary contraction (MIVC) of knee extension at four angles (15°, 45°, 75° and 105°). Ultrasound images of PCSA, fascicle length and penation angle of the quadriceps femoris muscles were acquired. These parameters were used in the model of Arnold et al. (2010) to estimate the individual voluntary moment of the same conditions of MIVC. The experimental moments were compared with the estimated moment and with generic architecture, collected from cadaveric studies (Ward et al., 2009). The results experimental moment, individual estimated moment (individual architecture) and generic estimated moment (architecture from cadavers form Ward et al., (2009)) were compared using Friedman's ANOVA (α<0.05) and Wilcoxon’s post-hoc (α<0.0167 - Bonferroni’s correction). Furthermore, the following analysis were performed: graphical analysis and Bland-Altman (1986), linear regression, intraclass correlation coefficient (ICC) and RMS error to identify which technique is more similar to the experimental moment. Results and Discussion: The moment estimated individually correctly predicted the experimental moment at 45°, 75° and 105°. The generic moment estimation agreed with the experimental moment at 75° and 105°. Both estimations presented tendencies to overestimate the experimental moment. The individual estimation presented lower RMS error and lower ICC. After correction of the muscle moment arm used in the model for the presented by Krevolin , Pandy and Pearce (2004 ), the peak angle of estimated moment was presented at the same angle of the experimental moment (75°). Conclusion: The estimate with individualized data architecture increases the degree of agreement in one of the angles. However, the correlation between the experimental data and those from the individualized model was not greater than that obtained by the generic estimation.
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Mukherjee, Gaurav. "Design and Development of an Assistive Exoskeleton for Independent Sit-Stand Transitions among the Elderly." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1407407328.
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Dardari, Luca. "Modellazione muscoloscheletrica subject-specific: applicazione a casi clinici e analisi delle incertezze." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11660/.
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Lo sviluppo sistematico di modelli subject-specific computerizzati per l’analisi di trattamenti personalizzati è attualmente una realtà. Infatti di recente sono state sviluppate molte tecnologie per la creazione di modelli virtuali ad elementi finiti, che ricreano accuratamente le geometrie specifiche del soggetto e tutte le proprietà fondamentali per ricreare le capacità motorie, basandosi su analisi d’immagine quantitative.
Tuttavia, per determinare le forze agenti sul sistema, necessitiamo di una intera analisi di cammino, solitamente in combinazione con uno studio di simulazione di dinamica inversa. In questo elaborato, mi propongo di illustrare i procedimenti per creare un modello subject-specific partendo da dati di imaging (da tomografie computerizzate) di un paziente reale affetto da displasia congenita dell’anca, e gli strumenti che ci permettono di effettuare le simulazioni del modello, al fine di ottenere informazioni quantitative circa le grandezze che governano la dinamica del cammino del paziente.
Il corpi rigidi del modello scheletrico saranno costruiti mediante la tecnica della segmentazione 3D, e verranno utilizzati per costruire un sistema articolato dotato di attuatori muscolo-tendinei e giunti articolari a due o tre gradi di libertà. Per conseguire questo obiettivo si farà uso del software, “NMSBuilder”, per poi inserirlo in un programma di simulazione di dinamica del movimento, “OpenSim”, che ci permetterà di calcolare forze muscolari, forze di contatto e momenti articolari del modello.
Questi risultati saranno di fondamentale importanza per studiare riabilitazioni ad hoc per pazienti affetti da DCA che devono essere sottoposti ad artroprotesi totale.
Lo scopo di questo studio sarà anche quello di analizzare la sensibilità delle previsioni dei modelli specifici durante la deambulazione tenendo conto delle incertezze nell'identificazione delle posizioni dei body-landmarks, della massima tensione muscolare e della geometria muscolo-tendinea.
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Perna, Alessandro. "Sviluppo e validazione di un modello di dinamica muscolare personalizzato per l'analisi del cammino." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21362/.
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Il sistema muscolo-scheletrico è un importante apparato del corpo umano, sorregge il peso corporeo e ne favorisce il movimento. Risulta quindi importante definire il suo comportamento; per farlo bisogna stimare grandezze difficilmente misurabili in vivo (i.e. le forze muscolari) e stabilire relazioni causa-effetto a partire dai dati sperimentali. Per far ciò, si fa uso di modelli muscolo-scheletrici, che sono una rappresentazione matematica del corpo umano e delle sue strutture; mediante simulazioni al computer, tali modelli, permettono di analizzare il movimento umano. Solitamente si fa uso di modelli generici, che derivano dalla dissezione di cadavere, ma questi ultimi hanno il limite di considerare per ogni soggetto in analisi la stessa anatomia. Con lo sviluppo delle conoscenze in ambito biomeccanico e con un più facile accesso alle immagini mediche, è stato possibile generare modelli di dinamica muscolo-scheletrica specifici per il soggetto. Nel caso dello studio di alcune malattie neuromuscolari, oppure nel caso in cui l’analisi è rivolta ad una popolazione pediatrica, si fa uso di modelli personalizzati in quanto la modellazione generica non è sufficiente. Questo progetto di tesi mostra quelli che sono i passaggi principali per lo sviluppo e la validazione di un modello di dinamica muscolo-scheletrico soggetto specifico per l’analisi del cammino. Tale modello è stato creato partendo dai dati forniti dalla Knee Grand Challenge 4th che mette a disposizione immagini di tomografica computazionale della gamba destra.
Vengono mostrati in questo elaborato risultati di cinematica inversa, dinamica inversa, ottimizzazione statica e forza di reazione ai giunti.
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Lefebvre, Félix. "Analyse cinématique de l'épaule et du membre supérieur par capture de mouvement avec et sans marqueurs." Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10264.
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La caractérisation précise et quantifiée du mouvement humain est essentielle dans de nombreux domaines et particulièrement en pratique clinique et sportive pour exploiter, préserver ou rétablir les capacités motrices. L’anatomie complexe de l’épaule lui confère une capacité de mouvement fine et de grande amplitude, au détriment d’une stabilité fragile et exposée à des risques importants d’altérations pouvant compromettre sa mobilité. Pour estimer la cinématique articulaire du complexe de l’épaule, il est donc nécessaire de disposer d’un système de capture de mouvement qui soit rapide, précis, et applicable en routine. Parmi les nombreux outils utilisés, l’estimation de la cinématique de l’épaule par mesure directe est généralement invasive ou irradiante, et en tout cas non adaptée à l’évaluation systématique. Les méthodes d’estimation cinématique de l’épaule par mesure cutanée indirecte sont plébiscitées, notamment avec marqueurs, mais avec une précision moindre du fait des artefacts des tissus mous. De nombreuses stratégies expérimentales et numériques ont été développées pour en améliorer les performances, sans toutefois donner pleinement satisfaction. Récemment, des méthodes de capture de mouvement sans marqueurs sont apparues mais aucune ne propose à ce jour d’estimations compatibles avec la modélisation cinématique détaillée du complexe de l’épaule. L’objectif de cette thèse était alors de contribuer au développement des outils d’analyse cinématique de l’épaule par capture de mouvement avec et sans marqueurs. Un premier sous-objectif de ce travail de thèse était d’étudier l’influence de l’optimisation du modèle cinématique et du poids des marqueurs de la scapula sur la cinématique scapulaire dans une optimisation multi-segmentaire. Les résultats de cette première étude ont mis en évidence que la redondance des marqueurs, à savoir l’utilisation de plus de trois marqueurs sur la scapula, est recommandée pour l’estimation de la cinématique scapulaire par optimisation multi-segmentaire. Ces résultats ont aussi montré que les poids optimaux sont à la fois spécifiques au participant et au mouvement, mais qu’un jeu de poids moyen par mouvement pouvait améliorer l’estimation de la cinématique scapulaire. Le second sous-objectif de ce travail de thèse était de développer une méthode de capture de mouvement sans marqueurs par algorithme d’apprentissage profond permettant le suivi cinématique du membre supérieur incluant le complexe de l’épaule. Cette seconde étude a consisté à développer un algorithme d’estimation de pose 2D capable d’identifier 20 repères anatomiques sur cinq mouvements différents avec une précision médiane inférieure à 9 px. La méthode de capture de mouvement sans marqueurs développée sur la base de cet algorithme a permis des estimations 3D des repères anatomiques de l’épaule avec une précision moyenne inférieure à 15 mm, aboutissant à une précision cinématique articulaire de 14° pour l’articulation scapulo-thoracique. Les estimations ainsi obtenues sont équivalentes voire meilleures que pour la capture de mouvement avec marqueurs, pour un gain de temps considérable par l’absence de préparation. De futurs travaux sont nécessaires pour transformer la preuve de concept développée en véritable outil de capture de mouvement, et valider son potentiel à devenir la méthode la plus adaptée pour l’estimation cinématique du complexe de l’épaule en routine<br>The precise and quantified characterization of human movement is essential in many fields, particularly in clinic and sports, to enhance, preserve, or restore motor abilities. The complex anatomy of the shoulder gives it fine and large-range motion capability, at the cost of fragile stability, exposing it to significant risks of impairments that can compromise its mobility. To accurately estimate the kinematics of the shoulder complex, it is necessary to have a motion capture system that is fast, accurate, and suitable for routine use. Among the many tools employed, shoulder kinematic estimation via direct measurement is generally invasive or radiation-based, and in any case not suited for systematic evaluation. Indirect skin-based shoulder kinematic estimation methods, especially those using markers, are widely used but offer lower accuracy due to soft tissue artifacts. Numerous experimental and numerical strategies have been developed to improve their performance, though they have not yet fully satisfied expectations. Recently, markerless motion capture methods have emerged, but to date, none of them provide estimates compatible with the detailed kinematic modeling of the shoulder complex. The objective of this thesis was therefore to contribute to the development of shoulder kinematic analysis tools using both marker-based and markerless motion capture. A first sub-objective of this thesis was to study the influence of kinematic model optimization and scapular marker weight on scapular kinematics in a multibody kinematic optimization. The results of this first study highlighted that marker redundancy, meaning the use of more than three markers on the scapula, is recommended for scapular kinematic estimation in multibody kinematic optimization. These results also showed that the optimal marker weights are both participant- and movement-specific, but that an average weight set per movement could improve scapular kinematic estimation. The second sub-objective of this thesis was to develop a markerless motion capture method using a deep learning algorithm that allows for the kinematic tracking of the upper-limb, including the shoulder complex. This second study involved developing a 2D pose estimation algorithm capable of identifying 20 anatomical landmarks across five different movements with a median accuracy of less than 9 px. The markerless motion capture method developed based on this algorithm provided 3D estimates of the anatomical landmarks of the shoulder with an average accuracy of less than 15 mm, resulting in an articular kinematic accuracy of 14° for the scapulothoracic joint. These estimates were equivalent to, if not better than, those obtained using marker-based motion capture, with a significant time-saving due to the absence of preparation required. Further research is needed to transform this proof of concept into a fully functional motion capture tool and validate its potential to become the most suitable method for routine shoulder complex kinematic estimation
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Wernet, Jack R. "Comparison of the Statically Equivalent Serial Chain Center of Mass Estimation Method to OpenSim's Residual Reduction Algorithm." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1628009554478147.
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Caruthers, Elena Joy Caruthers. "Investigating Lower Limb Muscle Function during the Sit to Stand Transfer and Stair Climbing." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1498569178798838.
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Bersani, Alex. "Personalizzazione e validazione di modelli muscoloscheletrici con dati di "Knee Grand Challenge"." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23671/.
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La modellazione muscoloscheletrica consente di visualizzare pattern motori complessi e di indagare variabili difficilmente misurabili altrimenti. Esistono modelli muscoloscheletrici “generici”, completi e rappresentativi di soggetti sani adulti, e sono in grande sviluppo modelli “soggetto-specifici”, caratterizzati da parametri personalizzati per essere resi più anatomicamente accurati. Tuttavia, la personalizzazione è costosa perché richiede tempo, esami clinici, denaro. L’obiettivo di questo documento è indagare come personalizzazioni progressive del modello, svolte esclusivamente utilizzando informazioni mediche del soggetto, influenzino i risultati delle simulazioni validando i risultati predetti dai modelli tramite confronto con il dato sperimentale effettuando una analisi SPM.
Il soggetto è un uomo (86 anni, altezza 180cm, peso 75Kg) dotato di una protesi strumentata al ginocchio sinistro. Utilizzando il dataset della Grand Challenge 5, sono stati sviluppati quattro modelli muscoloscheletrici caratterizzati da un livello di personalizzazione crescente. Inizialmente, sono stati confrontati su OpenSim due modelli generici opportunamente scalati sulle dimensioni del soggetto. Poi, è stato selezionato un modello tra i precedenti e ne è stata personalizzata la forza massimale isometrica di un gruppo di muscoli. In seguito, sono state personalizzate le geometrie ossee creando un modello soggetto-specifico utilizzando il software NMSBuilder e le forze personalizzate nella fase precedente.
Lo studio, in accordo con la letteratura, conferma che la personalizzazione dei modelli MS influisce notevolmente sull’accuratezza delle predizioni migliorandola sensibilmente. I modelli generici di partenza mostrano profili di forza di contatto al ginocchio lontani dal valore sperimentale misurato sul soggetto (r2≈0.6, RMSE≈0.6 BW). I modelli personalizzati mostrano migliore accuratezza sia nell’analisi SPM sia nella valutazione mediante indici statistici.
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Arumuganainar, Ganesh Prasanth. "Simulation of Lower Limb Muscle Activity During Inclined Slope Walking." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-243914.
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Robotic exoskeletons are designed to assist patients with motor dysfunctions. Recent researches focus on extending the robotic assistance to patient activities other than ground level walking. This study aims to analyse the lower limb muscle activity during inclined slope walking contrasting with that of ground level walking. Two different angles of inclination were chosen: 9 degrees and 18 degrees. 9 degrees inclined slope is the universal ramp size for wheelchairs. The hypothesis is that muscle activation, and ultimately metabolic cost, in inclined slope walking is different from that of ground level walking. Collected motion data and simulation in OpenSim prove that the difference in metabolic cost is because of increased activity of ankle dorsiflexors and hip extensors and reduced activity of knee extensors. Finally, muscle activities along with other criteria such as kinematic alignment and joint range of motion are summed up as biomechanical considerations for robotic exoskeleton design.
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Franke, Maik. "Managementtool für InfiniBand." Thesis, Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200500063.
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Muller, Bjørn Christian. "Implementering av openBIM i kalkulasjonsprosessen." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18463.
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Implementering av openBIM i kalkulasjonsprosessen vil åpne for helt andre muligheter i tilnærmingen til et nytt prosjekt. Med det menes at informasjonen tilknyttet en åpen BIM vil bidra til å gi et bedre grunnlag for konseptvalg og alternative løsninger gjennom gode visualiseringsegenskaper i modellen og en høyere informasjonsgrad i en tidligere fase sammenlignet med en tradisjonell 2D-basert kalkulasjonsprosess. OpenBIM baserer seg i hovedsak på de tre ulike og åpne standardene IFC, IFD og IDM. Når man setter de tre aspektene av openBIM i sammenheng omtaler man åpen BIM som å ha et omforent lagringsformat med enighet om terminologi der BIM-modellen kan kobles opp mot veletablerte forretningsprosesser. Åpen BIM vil dermed fungere som en universell tilnærming til samarbeid, realisering og drift av bygninger basert på åpne standarder og god informasjonsutveksling.En openBIM-basert kalkulasjonsprosess består i å integrere objektene og deres tilhørende attributter/informasjon fra prosjektets ulike BIM-modeller inn i entreprenørens kostnadsdatabase som inneholder prisinformasjon til hvert enkelt objekt eller delobjekt. En slik prosess kan deles inn i tre delprosesser som beskriver arbeidet fra entreprenørens mottakelse av en BIM til ferdig utarbeidet kalkyle. De tre prosessene er; organisering av modellen, oppbygning av objektenes resepter og selve kalkulasjonen av kalkylen.Mengdeberegning sees ofte på som det første steget innenfor kalkulasjonsprosessen og i tradisjonelle kalkulasjonsprosesser utgjør mengdeberegning mellom 50-80 prosent av kalkulatørenes tidsbruk. OpenBIM vil tilrettelegge for en tilnærmet automatisk mengdeberegningsprosess, noe som vil frigjøre mye tid og ressurser hos kalkulatørene der de heller kan fokusere på nøyere vurdering av prosjektets konsept og tilhørende alternative løsninger. På bakgrunn av dette er mengdeberegningsprosessen en av de prosessene som har størst potensial til forbedring ved implementering av openBIM. Selv om åpen BIM tillater automatiske mengdeberegninger vil behovet for kalkulatører i en kalkulasjonsprosess aldri endre seg. Deres arbeidsoppgaver, ved å besitte gode kalkulasjonsegenskaper og samtidig ta hånd om og strukturere informasjonen i en BIM, er helt nødvendig for å utvikle et godt anbud. Dagens kalkulasjonspraksis i MajaTeknobygg framstår i dag som en mindre integrert prosess enn den ville gjort ved full utnyttelse av BIM. Calcus tas i bruk i tidligfasen for å få et hurtig kostnadsestimat av prosjektet. Mengdene hentes ut ved hjelp av et 2D-basert mengdeberegningsprogram for så å implementeres inn i ressurskalkyleverktøyet ByggOffice. Prosessene har lite eller ingen integrasjon mellom seg og nå som både ByggOffice og Calcus har fått innført egen BIM-modul med bedre integrasjon seg imellom vil det å se på samhandlingen mellom programvarene være viktig å gjøre for MajaTeknobygg. Fordelene ved å ta i bruk IFC-formatet i kalkulasjonsprosessen vil helt klart være en bedre samspillprosess og en mer komprimert prosjektering der informasjonsflyten på tvers av ulike fag vil fungere på en god måte. I en slik prosess må kalkulatørene etablere leveringskrav til de ulike aktørene under modelleringsprosessen slik at nødvendig modellinformasjon ligger tilgjengelig til riktig tidspunkt. Det må også avklares og bestemmes et system for objektenes rolle i en BIM. Ofte modelleres det objekt i en BIM uten at det videre er avklart om dets plassering og oppbygning er bestemt eller om det kun brukes til visualisering i modellen. Calcus har lenge vært et godt kalkulasjonsverktøy for vurderinger av kostnadsbildet i tidligfasen av et prosjekt. Med programmets nyetablerte BIM-modul for import/eksport av IFC-modeller vil prosjektet fremstå med blant annet større sporbarhet, (delvis) automatisk mengdeberegning og et bedre produkt for konseptvalg med tilhørende alternative løsninger. Kalkulasjonsverktøyet har i dag en god struktur med kontoplan oppbygd etter NS3451 og integrerte prislinjer basert på NS 3420. Ved standardisert bruk av BIM vil Calcus etter hvert få implementert et standard objektbibliotek som blir viktig i en kalkulasjonsprosess med openBIM.
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Samuelsson, Mathias. "DANE with OpenSSL : PKIX certificate authentication throughDNS using OpenSSL." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176749.
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Background X.509 is an ITU standard for a public key infrastructure (PKI), which specifies, among other things, formats for public key certificates, certificate requests, certificate revocation lists and certification path validation algorithm. The X.509 standard was primarily designed to support the X.500 structure. However, today’s use cases centre mostly on the Internet. IETF’s Public-Key Infrastructure (X.509) working group has adapted the standard to the requirements and structure of the Internet. RFC 5280 specifies the PKIX Certificate and CRL Profile of the X.509v3 certificate standard. PKIX certificates are used for validating the identity or identities of the communicating parties, and optionally establishing secure keying material for protection of a message or a communications channel. Authentication and establishment of a secure communications channel on top of TCP with the Transport Layer Security protocol (TLS, RFC 5247) or the Secure Sockets Layer protocol (SSL) is probably the most common application of PKIX on the Internet. The IETF is converging on a standard for integration of X.509 Public Key Infrastructure with DNS and DNSSEC (DANE). In order to reach wide adoption, the concept must be validated through interoperability tests between multiple independent implementations. Results An implementation of the DANE standard has been demonstrated through an extension to the OpenSSL library. All use cases in the DANE standard has been validated to work as documented in the standard. Conclusions The DANE standard is implementable and reaches the results it sets out to achieve.
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Raabe, Margaret E. "The Effect of Core Stability on Running Mechanics in Novice Runners." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1490797665222069.
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Dandapanthula, Nishanth. "InfiniBand Network Analysis and Monitoring using OpenSM." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313422543.
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Kohout, Jaroslav. "Systém klient-server založený na OpenSSL." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217511.
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Aim of this diploma thesis is study of possibilities of OpenSSL extension in PHP environment and its implementation in securing client-server system example. This system will be use to store confidential data. Whole system will be exemplar of securing against scale of attacks leads to gain private data.
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Janeček, Václav. "Open source PBX Kamailo a OpenSIPs." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220656.
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Open source PBX Kamailio and OpenSIPS diploma thesis covers familiarization with appointed SIP exchanges and with their power comparing. A detailed installation instructions on the operating system Ubuntu is the aim of this work too. The work includes the historical development of telephone exchanges with a focus on the latest generation. The following is SIP protocol basic description and components that can be composed SIP exchanges. Another part is devoted to the development of exchanges Kamailio and OpenSIPS. The thesis contain the archutecture and configuration file description. The practical part of the thesis deals with high-capacity switches, and comparing it in terms of memory and computational demands. Selected measurements are compared with the Asterisk PBX.
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Stien, Eirik. "Increasing Identity Governance when using OpenID : Hosting an OpenID Identity Provider on a smartphone." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13806.
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In the area of identity management OpenID is an identity system allowing users to log in to OpenID-enabled web sites by proving ownership of an OpenID Identifier by authenticating with its controlling OpenID Identity Provider. A user can choose to host an OpenID Identity Provider herself or trust in existing third-party providers such as Google. Technical skill is required for the former, leaving it unavailable for the average user.This thesis simplifies the matter by implementing an OpenID Identity Provider as a smartphone application, making use of the traditional server-like features inherent in such devices. New possiblities for authenticating the user arise as she is enabled to physically interact with the OpenID Identity Provider, which in the traditional scheme is performed through the web browser. As a result from these new possiblities, phishing attacks are claimed to be avoided and identity attributes are exempted from being controlled and possibly exploited by any third-party.One of several technical challenges include enabling the smartphone to receive inbound connections as this is required by the OpenID Authentication protocol, but restricted by telecom operators by default. Functionality must be in place to backup identity repositories stored on the smartphone in order not to lose possession of the established OpenID identities if the device becomes lost or damaged. Lastly, focus is given to make the solution easily applicable for even the novice consumer.
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Laivamaa, J. (Juuso). "Reinforcement Q-Learning using OpenAI Gym." Bachelor's thesis, University of Oulu, 2019. http://jultika.oulu.fi/Record/nbnfioulu-201903151329.
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Abstract. Q-Learning is an off-policy algorithm for reinforcement learning, that can be used to find optimal policies in Markovian domains. This thesis is about how Q-Learning can be applied to a test environment in the OpenAI Gym toolkit. The utility of testing the algorithm on a problem case is to find out how well it performs as well proving the practical utility of the algorithm. This thesis starts off with a general overview of reinforcement learning as well as the Markov decision process, both of which are crucial in understanding the theoretical groundwork that Q-Learning is based on. After that we move on to discussing the Q-Learning technique itself and dissect the algorithm in detail. We also go over OpenAI Gym toolkit and how it can be used to test the algorithm’s functionality. Finally, we introduce the problem case and apply the algorithm to solve it and analyse the results.
The reasoning for this thesis is the rise of reinforcement learning and its increasing relevance in the future as technological progress allows for more and more complex and sophisticated applications of machine learning and artificial intelligence.
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Winberg, Andreas, and Lindström Oliver Öhrstam. "Reinforcement Learning Methods for OpenAI Environments." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-293855.
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Using the powerful methods developed in the fieldof reinforcement learning requires an understanding of theadvantages and drawbacks of different methods as well as theeffects of the different adjustable parameters. This paper high-lights the differences in performance and applicability betweenthree different Q-learning methods: Q-table, deep Q-network anddouble deep Q-network where Q refers to the value assigned toa given state-action pair. The performance of these algorithms isevaluated on the two OpenAI gym environments MountainCar-v0 and CartPole-v0. The implementations are done in Pythonusing the Tensorflow toolkit with Keras. The results show thatthe Q-table was the best to use in the Mountain car environmentbecause it was the easiest to implement and was much fasterto compute, but it was also shown that the network methodsrequired far less training data. No significant difference inperformance was found between the deep Q-network and thedouble deep Q-network. In the end, there is a trade-off betweenthe number of episodes required and the computation time foreach episode. The network parameters were also harder to tunesince much more time was needed to compute and visualize theresult.<br>Att använda de kraftfulla metoderna som utvecklats inom området reinforcement learning kräver en förståelse av fördelar och nackdelar mellan olika metoder samt effekterna av de olika justerbara parametrarna. Denna artikel belyser skillnaderna i prestanda och funktionalitet mellan tre olika metoder: Q-table, deep Q-network och double deep Q- network. Prestandan för dessa algoritmer utvärderas i de två OpenAI gym-miljöerna MountainCar-v0 samt Cartpole-v0. Implementeringarna görs i python med hjälp av programvarubiblioteket Tensorflow tillsammans med Keras. Resultaten visar att Q-table var lättast att implementera och tränade snabbast i båda miljöerna. Nätverksmetoderna krävde dock mindre träningsdata även om det tog lång tid att träna på den data som fanns. Inga stora skillnader i prestanda hittades mellan deep Q-network och double deep Q-network. I slutändan kommer det alltid vara en balansgång mellan mängden träningsdata som krävs och tiden det tar att träna på den data som finns.
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Khan, Rasib Hassan. "Decentralized Authentication in OpenStack Nova : Integration of OpenID." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-47888.
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The evolution of cloud computing is driving the next generation of internet services. OpenStack is one of the largest open-source cloud computing middleware development communities. Currently, OpenStack supports platform specific signatures and tokens for user authentication. In this thesis, we aim to introduce a platform independent, flexible,and decentralized authentication mechanism in OpenStack. We selected OpenID as an open-source authentication platform. It allows a decentralized framework for user authentication. OpenID has its own advantages for web services, which include improvements in usability and seamless SSO experience for the users. This thesis presents the OpenID-Authentication-as-a-Service APIs in OpenStack for front-end GUI servers, and performs the authentication in the back-end at a single Policy Decision Point. The design was implemented in OpenStack, allowing users to use their OpenID Identifiers from standard OpenID providers and log into the Dashboard/Django- Nova graphical interface of OpenStack.<br>Utvecklingen av molndatabearbetning är drivande nästa generation av Internet-tjänster. OpenStack är en av de största öppen källkod mellanprogramvara datormoln utveckling samhällen. För närvarande stöder ITplattform specifika signaturer och pollett som för användarautentisering. I denna avhandling vill vi införa en plattformsoberoende, flexibel och decentraliserad autentiseringsmekanism i OpenStack. Vi valde OpenID som en öppen källkod autentisering plattform. Det möjliggör en decentraliserad ram för användarautentisering. OpenID har sina fördelar för webbtjänster, som omfattar förbättringar i användbarhet och sömlös SSO-upplevelse för användarna. Denna avhandling presenterar de OpenID-Autentisering-as-a-Service APIer i OpenStack för front-end GUI servrar och utför autentisering i back-end i ett enda politiskt beslut punkt. Designen genomfördes i OpenStack, så att användarna kan använda sina OpenID kännetecken från standarden OpenID leverantörer och logga in på Dashboard / Django-Nova grafiskt gränssnitt av OpenStack.
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Karcher, René. "Virtualisierte DMZ auf Xen-Basis OpenQRM und Xen als Partner." Hamburg Diplomica-Verl, 2007. http://d-nb.info/989529673/04.
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Karcher, René. "Virtualisierte DMZ auf Xen-Basis : OpenQRM und Xen als Partner /." Hamburg : Diplomica Verl, 2008. http://www.diplom.de/katalog/arbeit/11199.
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Karlapudi, Janakiram. "A methodology to determine and classify data sharing requirements between OpenBIM models and energy simulation models." Universitätsverlag der TU Berlin, 2019. https://tud.qucosa.de/id/qucosa%3A73548.
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Energy analysis at different stages of a building’s life-cycle allows designers and engineers to make proper design decisions, which will enhance the efficiency and energy saving measures. However, energy analysis of a building using traditional methods at every stage of the project is time-consuming and more labor intensive. Thus, energy simulations of buildings are rarely introduced in all design stages of the project. This study focuses on data transfer process from BIM model (Revit) to energy simulation model (IES<VE>) using OpenBIM meta-data model - Industry Foundation Classes (IFC) as an exchangeable file format. This data sharing process simplifies the complexity in energy modeling and allows to investigate different design alternatives in each phase of the building’s life-cycle. To investigate the efficiency and completeness of this data transfer process, a demonstration of data sharing is carried. By evaluating the results from the demonstration, efficiency gaps are identified in the data transferred process. A detailed investigation on the cause of efficiency gaps in data sharing is carried out and incorporated in this paper.:Abstract
1. Introduction
2. Building Energy Simulation
2.1. Categorization of Energy Simulation Models
3. Data Sharing Requirements - IFC
4. Data Sharing Demonstration
4.1. BIM model
4.2. Data investigation with model viewer
4.3. Data quality verification in energy simulation model
4.3.1. Evaluation of Results
5. Conclusion
References
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Юринець, Ю. Л., and S. A. Loetska. "Parliament opens space to private companies." Thesis, Vector, 2020. https://er.nau.edu.ua/handle/NAU/44764.
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The development of space technology has a positive effect on the growth of the world economy, but many countries are falling out of this process due to the high cost of space launches, which they cannot afford. We are used to Ukraine having the status of a space state. But it is more a memory of the past than a plan for the future, and even more so for the present.
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Awan, Naser Saeed. "Characterization of SIP Signaling-Messages Over OpenSIPS Running On Multicore Server." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121530.
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Over the course of last decade, the demand for VoIP (Voice over Internet Protocol) applications has increased significantly among enterprises and individuals due to its low cost. This increasing demand resulted in a significant increase in users who require reliable VoIP communication systems. QoS (Quality of Service) is a major issue in VoIP implementation and is a method to impel the development of real-time multimedia services like VoIP and videoconferencing. However, there are certain challenges in achieving QoS for VoIP application, which need special attentions; like latency and packet loss. The VoIP servers which are functioning on single core software/hardware model have high latency and packet loss issues due to their limited processing bandwidth. A multicore software/hardware model is the solution to cope up with the increasing demands of VoIP and yet an active research area in telecommunication. Using a multicore software/hardware model for VoIP has several challenges, one of the challenges is to design and implement QoS Benchmarking module for VoIP client and server on multicore. In this thesis the focus is on latency and packet loss of SIP messages on OpenSIPS server. This is done by performing stress testing for QoS benchmarking, where delay and call drop rate is calculated for SIP (Session Initiation Protocol) signaling messages on parallel VoIP client server model. The model is built in C for multicore and is used as a simulation tool. SIP is widely deployed protocol for call establishment, maintenance and termination in VoIP.
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Tosi, Giammarco. "Reinforcement Learning per robot grasping in ambiente Gym openAI." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12932/.
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La teoria del Reinforcement Learning fornisce considerazioni formali, profondamente radicate nelle prospettive psicologiche e neuroscientifiche sul comportamento animale, di come gli agenti siano in grado di ottimizzare il loro controllo su un ambiente. In seguito allo studio dei metodi di Reinforcement Learning, l’obiettivo principale del lavoro di tesi è dimostrare che mediante gli stessi, un agente, servendosi di un braccio meccanico, è in grado di apprendere autonomamente come afferrare un oggetto. Al fine di conseguire l’obiettivo posto vengono realizzati gli ambienti di simulazione 2D robotArm, in diverse configurazioni, e due agenti: Q-Learning e Deep Q-Learning. Il primo agente implementa il metodo Q-Learning come proposto in letteratura con materializzazione della tabella per la stima della funzione valore, mentre il secondo sostituisce la tabella con una rete neurale volta all’approssimazione della funzione valore, la quale ha permesso l’utilizzo di una più dettagliata rappresentazione dello stato dell’ambiente. In seguito ai risultati ottenuti, viene dimostrato che mediante i metodi di Reinforcement Learning, un agente è in grado di apprendere in modo autonomo le dinamiche richieste per afferrare correttamente sia un oggetto in posizione statica che in movimento.
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Johansson, Tom. "Electronic Identification Based on OpenID Connect : A Design Proposal." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210575.
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Electronic identification is used by an individual to prove who he or she is by electronic means and is normally used for logging in to various services. In Sweden there are a number of different solutions that are developed and provided by different parties. In order to promote and coordinate electronic identification for public services, the Swedish E-identification Board was founded in 2011. The Board has developed a technical framework for integration between the Relying Party and the Identity Provider based on the Security Assertion Markup Language V2.0 (SAML) standard. SAML is a quite old standard that has some limitations complicating an electronic identification solution based on it. A newer competing standard is OpenID Connect, which could be a possible candidate as an alternative to SAML. The objective of this thesis is to determine to what extent it is possible to ensure confidentiality, integrity, and accountability in an electronic identification based on OpenID Connect. To achieve this, a number of requirements for electronic identifications were identified and a design proposal based on OpenID Connect was developed together with a proof-of-concept implementation. The design proposal was evaluated against the requirements, with the final result that an electronic identification based on OpenID Connect could meet the requirements.<br>E-legitimation används av en individ för visa vem han eller hon är på elektronisk väg och används vanligtvis för att logga in på olika tjänster. I Sverige finns ett antal olika lösningar som utvecklas och tillhandahålls av olika parter. För att främja och samordna elektronisk identifiering för offentliga tjänster grundades E-legitimationsnämnden 2011. Nämnden har tagit fram ett tekniskt ramverk för integrationen mellan Förlitande Part och Legitimeringstjänst baserad på Security Assertion Markup Language V2.0 (SAML) standarden. SAML är en relativt gammal standard med vissa begränsningar som komplicerar en e-legitimationslösning baserad på den. En nyare konkurrerande standard är OpenID Connect, vilket kan vara en möjlig kandidat som ett alternativ till SAML. Syftet med detta examensarbete är att undersöka i vilken utsträckning det är möjligt att säkerställa sekretess, integritet och ansvarsskyldighet för en e-legitimation baserad på OpenID Connect. För att uppnå detta, identifierades ett antal krav för e-legitimationer och ett designförslag baserat på OpenID Connect utvecklades tillsammans med en proof-of-concept implementation. Designförslaget utvärderades mot kraven, med det slutliga resultatet att en e-legitimation baserad på OpenID Connect kan uppfylla kraven.
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Anderson, Judy. "A Place Opens: An Exploration of Touch." Thesis, Griffith University, 2010. http://hdl.handle.net/10072/368104.
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In this PhD project, A Place Opens: An Exploration of Touch, palimpsest emerges as the organising principle of the creative works and exegesis that together constitute the thesis. As a method of (apparently infinite) layering, palimpsest is inclusive, able to contain fragments or traces from past and present; suggest future vectors; disrupt established or habituated representational techniques and communicative strategies, and introduce new strategies; render familiar spaces in ‘new’ ways; produce singularities. My work explores the potentials of palimpsests, as felt surfaces, to become eroticised sites that evoke the memory of touch and the movements of desire back and forth between layers. The focus of the research is on notions of productive desire and desire as transformative. This focus is developed in my practice through an exploration of touch. The aim is for the work to open out the matter of desire, so that new questions might arise that can lead to new engagements and reflections. The research makes a contribution to the problematics of bodies and embodiment in relation to object, Art and representation, as well as bringing the embodied practice of installation into proximity with feminist discourses concerning the need for a more subtle and positive understanding of feminine desire and female subjectivity. I draw on recent feminist thinking (e.g. Elizabeth Grosz, Elspeth Probyn, Moira Gatens and Laura Marks) and engage closely with aspects of the work of Deleuze and Guattari, especially in relation to process, to how rhizomatics, making multiplicities and notions of becoming can inform my practice. Using mixed-media – including painting, photography, altered objects, installation and video – to produce sensual and embodied spatial explorations, I have sought ways to evoke the sense of touch, inviting an intimate, tactile visuality, approached through the movements of productive desire. Techniques and concepts of palimpsest, folds, openings, light, shadows and the interrogation of materiality, play a significant part in my project’s investigation of how touch – the sensing and desiring body – and embodied encounters can be deployed in visual media.
Body processes, such as breathing, whispering, touching, opening, folding and fluidity are therefore invoked among techniques that create slippage between bodies,and between bodies and objects in spaces, as well as to generate embodied knowledge – thinking in and through the sensory body. My work also exploits haptic modes of looking which set the conditions making possible the sensation or experience of an erotics of visuality, which in turn can produce feelings of embodied engagement. In order to dis-organise conventional modes of experiencing bodies and objects, I make use of a range of making-strange strategies and processes – to make the familiar strange in order to make it more familiar, more intimate again. These strategies involve the alterability of bodies and objects through touch.
My work, therefore might be said to invite an intimate way of looking closely at/into something, always attending not only to surface but to what the surface contains, occludes or permits access to. An image that evokes such looking, invites closeness, intimacy and an inter-subjective exchange. How the works produce embodied encounters that engage with an erotics of looking is more readily understood through thinking about desire and how desire functions productively in relations between bodies, objects and spaces.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>School of Humanities<br>Arts, Education and Law<br>Full Text
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Herbig, Christopher Fred. "Use of OpenSSH support for remote login to a multilevel secure system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FHerbig.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, Dec. 2004.<br>Thesis Advisor(s): Cynthia E. Irvine, Thuy D. Nguyen. Includes bibliographical references (p. 201-202). Also available online.
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Sjöholm, Markus. "Analysis of the Use of OpenID Connect for Electronic Signatures." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-452756.
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The use of digital services has never been as important as it is today.It is possible to do everything from researching family history to banktransactions on the Internet. This creates a demand for secure servicesto ensure secure authentication of users. Electronic signatures havebecome an important part of e-identification over the last year due tothe the COVID-19 pandemic forcing many people to work remotely.OpenID Connect, or OIDC, is a framework that supports secureauthentication and authorization. But, it does not support electronicsignatures. The work done in this project has shown that an extensionof the OIDC framework is feasible for electronic signatures.A proof of concept has been built to analyse if an extension tothe OIDC framework was possible. The signature flow implementedis structured according to a proposal developed by an experiencedgroup of people working with e-identification. It extends the OIDCauthentication request with additional information to enable supportfor electronic signatures. The signature is done using BankID as an IDP.This work shows that it is possible to perform an electronic sig-nature, with an OpenID Connect authentication flow with signatureextension. The work has focuses on one model using an IDP thatperforms signing. An approach with a stand-alone signature service ispossible, but would be more complex for a limited proof of concept.
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Sattarvand, Javad. "Long term openpit planning by ant colony optimization 7 submitted by Javad Sattarmand." Aachen Mainz, 2009. http://d-nb.info/1000728579/04.
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Heidbrink, Scott Jared. "A Large-Scale Analysis of How OpenSSL Is Used in Open-Source Software." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6716.
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As vulnerabilities become more common the security of applications are coming under increased scrutiny. In regards to Internet security, recent work discovers that many vulnerabilities are caused by TLS library misuse. This misuse is attributed to large and confusing APIs and developer misunderstanding of security generally. Due to these problems there is a desire for simplified TLS libraries and security handling. However, as of yet there is no analysis of how the existing APIs are used, beyond how incorrect usage motivates the need to replace them. We provide an analysis of contemporary usage of OpenSSL across 410 popular secure applications. These insights will inform the security community as it addresses TLS library redesign.
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Lundholm, André. "Implementing an OpenAI Gym for Machine Learning of Microgrid Electricity Trading." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-42743.
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Samhället går idag bort från centraliserad energi mot decentraliserade system. Istället för att köpa från stora företag som skapar el från fossila bränslen har många förnybara alternativ kommit. Eftersom konsumenter kan generera solenergi med solpaneler kan de också bli producenter. Detta skapar en stor marknad för handel av el mellan konsumenter i stället för företag. Detta skapar ett så kallat mikronät. Syftet med denna avhandling är att hitta en lösning för att köpa och sälja på dessa mikronät. Genom att använda en Q-learning-lösning med OpenAI Gym-verktygslådan och en mikronätsimulering syftar denna avhandling till att svara på följande frågor: I vilken utsträckning kan Qlearning användas för att köpa och sälja energi i ett mikrosystem, hur lång tid tar det köp och sälj algoritm för att träna och slutligen påverkar latens genomförbarheten av Q-learning för mikronät. För att svara på dessa frågor måste jag mäta latens och utbildningstid för Q-learninglösningen. En neural nätverkslösning skapades också för att jämföra med Q-learning-lösningen. Från dessa resultat kunde jag säga att en del av det inte var så tillförlitligt, men vissa slutsatser kunde fortfarande göras. För det första är den utsträckning som Q-learning kan användas för att köpa och sälja ganska bra om man bara tittar på noggrannhetsresultaten på 97%, men detta sitter på mikronätets simulering för att vara korrekt. Hur lång tid det tar att köpa och sälja algoritm för att träna uppmättes till cirka 12 sekunder. Latensen anses vara noll med Q-learning-lösningen, så den har stor genomförbarhet. Genom dessa frågor kan jag dra slutsatsen att en Q-learning OpenAI Gym-lösning är genomförbart.<br>Society is today moving away from centralized power towards decentralized systems. Instead of buying from large companies that create electricity from fossil fuels, many renewable alternatives have arrived. Since consumers can generate solar power with solar panels, they can also become the producers. This creates a large market for trading electricity between consumer instead of companies. This creates a so called microgrid. The purpose of this thesis is to find a solution to buying and selling on these microgrids. By using a Q-learning solution with the OpenAI Gym toolkit and a microgrid simulation this thesis aims to answer the following questions: To what extent can Q-learning be used to buy and sell energy in a microgrid system, how long does it take the buy and sell algorithm to train and finally does latency affect the feasibility of Q-learning for microgrids. To answer these questions, I must measure the latency and training time of the Q-learning solution. A neural network solution was also created to compare to the Q-learning solution. From these results I could tell some of it was not that reliable, but some conclusions could still be made. First, the extent that Q-learning can be used to buy and sell is quite great if just looking at the accuracy results of 97%, but this is on the microgrid simulation to be correct. How long it takes to buy and sell algorithm to train was measured to about 12 seconds. The latency is considered zero with the Q-learning solution, so it has great feasibility. Through these questions I can conclude that a Qlearning OpenAI Gym solution is a viable one.
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Milzoni, Alessandro. "Kinect e openNI a supporto delle NUI (Natural User Interface) applications." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6113/.
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Bell, Jessica. "AGRES II Opens Door to More Research in Africa." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/295682.
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Del, Puppo Norman. "High resolution ship hydrodynamics simulations in opens source environment." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10983.
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2013/2014<br>The numerical simulation of wake and free-surface flow around ships is a complex topic that involves multiple tasks: the generation of an optimal computational grid and the development of numerical algorithms capable to predict the flow field around a hull. In this work, a numerical framework is developed aimed at high-resolution CFD simulations of turbulent, free-surface flows around ship hulls. The framework consists in the concatenation of “tools” in the open-source finite volume library OpenFOAM®. A novel, flexible mesh-generation algorithm is presented, capable of producing high-quality computational grids for free-surface ship hydrodynamics. The numerical framework is used to solve some benchmark problems, providing results that are in excellent agreement with the experimental measures.<br>XXVII Ciclo<br>1981
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Mayo, Quentin R. "Detection of Generalizable Clone Security Coding Bugs Using Graphs and Learning Algorithms." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1404548/.
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This research methodology isolates coding properties and identifies the probability of security vulnerabilities using machine learning and historical data. Several approaches characterize the effectiveness of detecting security-related bugs that manifest as vulnerabilities, but none utilize vulnerability patch information. The main contribution of this research is a framework to analyze LLVM Intermediate Representation Code and merging core source code representations using source code properties. This research is beneficial because it allows source programs to be transformed into a graphical form and users can extract specific code properties related to vulnerable functions. The result is an improved approach to detect, identify, and track software system vulnerabilities based on a performance evaluation. The methodology uses historical function level vulnerability information, unique feature extraction techniques, a novel code property graph, and learning algorithms to minimize the amount of end user domain knowledge necessary to detect vulnerabilities in applications. The analysis shows approximately 99% precision and recall to detect known vulnerabilities in the National Institute of Standards and Technology (NIST) Software Assurance Metrics and Tool Evaluation (SAMATE) project. Furthermore, 72% percent of the historical vulnerabilities in the OpenSSL testing environment were detected using a linear support vector classifier (SVC) model.