This thesis describes a system for dealing with free surface fluid simulations, and the components needed in order to construct such a system. It builds upon recent research, but in a computer graphics context the amount of available literature is limited and difficult to implement. Because of this, the text aims at providing a solid foundation of the mathematics needed, at explaining in greater detail the steps needed to solve the problem, and lastly at improving some aspects of the animation process as it has been described in earlier works. The aim of the system itself is to provide visually plausible renditions of animated fluids in three dimensions in a manner that allows it to be usable in a visual effects production context. The novel features described include a generalized interaction layer providing greater control to artists, a new way of dealing with moving objects that interact with the fluid and a method for adding source and drain capabilities.

Orientador: Franco Giuseppe Dedini / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-08-08T01:54:08Z (GMT). No. of bitstreams: 1 Alvarenga_FlaviaBonilha_D.pdf: 5678227 bytes, checksum: 5952ab60908e269829b3aebb473b40cc (MD5) Previous issue date: 2006 / resumo: A população mundial está envelhecendo e o número de pessoas com necessidades especiais está aumentando. Atualmente novas tecnologias e novos produtos estão sendo desenvolvidos para melhorar a qualidade de vida. A maioria dos produtos não são acessíveis à toda a população, sendo geralmente projetados para um público alvo, excluindo pessoas com deficiência e idosos. A busca pela inclusão de pessoas com deficiência na sociedade gerou um grande número de leis e uma abordagem de projeto denominada Universal Design. O princípio do Universal Design é obter produtos que possam ser usados pelo maior número de pessoas possível. Esta tese tem o objetivo de propor uma metodologia de projeto para prover a inclusão dessas pessoas em relação ao uso de produtos. Para isso foi necessário um estudo aprofundado sobre os princípios do Universal Design, sua importância e suas principais abordagens. Através de estudos sobre metodologias de projeto e suas principais ferramentas foi possível propor uma metodologia de projeto onde se aplicam os conhecimentos do processo de projeto do produto norteados pelos princípios do Universal Design. O processo metodológico de projeto utilizado nesta tese foi baseado no estado da arte dos processos de desenvolvimento de produtos mais conhecidos, identificando e combinando ferramentas de projeto tradicionais de forma a conceber uma metodologia dedicada a encontrar o mais alto grau de inclusividade possível entre os processos em estudo. A metodologia proposta consiste no desdobramento das duas fases iniciais do projeto do produto denominadas estudo da viabilidade e projeto preliminar, em etapas e em tarefas que orientam o projetista na execução do desenvolvimento de um produto. Como forma de validação da metodologia proposta, um protótipo de um módulo de locomoção foi desenvolvido como estudo de caso que foi testado e o mesmo demonstrou desempenho satisfatório e com uma ampla gama de funções alternativas / Abstract: The world population is aging and the number of people with special needs is also increasing. Nowadays, new technology and products have been developed to improve quality of life. Most of the products are not accessible to all the population, being generally designed for a target public, excluding disabled and elderly people. In order to include disabled people in the society, large numbers of laws have been elaborated and a new approach of projects called Universal Design has been created. The principle of Universal Design is to obtain products that can to be used by the largest possible number of people. This thesis has the objective of proposing a design methodology for including this category of people with respect to use of products. Therefore, it was necessary to conduct a study about the main principles of Universal Design, its importance and its main approaches. Through studies on design methodologies and its main tools, it was possible to propose a new design methodology using the principles of Universal Design. The design methodology proposed in this thesis was based on the state-of-the-art of well-known design methodologies, identifying and combining traditional design tools in order to obtain an inclusive design methodology. The proposed methodology consists in two initial phases of product design: the viability study and the preliminary design. For the evaluation of the proposed methodology, a locomotion module prototype has been developed as a case study. The prototype was tested and demonstrated a satisfactory performance with great extent of alternative functions / Doutorado / Mecanica dos Sólidos e Projeto Mecanico / Doutor em Engenharia Mecânica

La Théorie de la Relativité (TRR), est une théorie particulièrement contre-intuitive dont les implications sont inaccessibles à l'expérience sensible humaine ; ce qui pose un certain nombre de difficultés de compréhension aux étudiants. Cependant, la Réalité Virtuelle (RV) offre une approche intéressante en permettant à un utilisateur d'être immergé et d'interagir dans un monde virtuel où la vitesse de la lumière est ramenée à 1 m/s. Les phénomènes relativistes deviennent ainsi directement accessibles par ses sens. Cette caractéristique, point départ de nos travaux, permet alors d’appréhender les phénomènes relativistes par une expérience « par la pratique ». L'enjeu de notre travail porte plus précisément sur la définition de moyens et de méthodes intégrés dans une plate-forme immersive permettant d'appréhender les phénomènes relativistes. Dans ce contexte, nous proposons, tout d’abord, des méthodes novatrices pour simuler les phénomènes relativistes sur un nombre quelconque d'objets en mouvement arbitraire et tenant compte de la dynamique relativiste des objets dans la scène, notamment durant leurs interactions. Nous nous focalisons sur les effets qui déforment les objets vus par l'observateur, à savoir le délai de propagation des photons, la relativité des longueurs et l'effet d'aberration. Nous définissons ensuite des méthodes pour intégrer une simulation relativiste dans un environnement immersif basé intrinsèquement sur un monde newtonien. Nous proposons également une plate-forme expérimentale dans laquelle sont intégrées des méthodes d'interaction utilisées pour mettre en scène un « jeu sérieux », ici un billard relativiste. Enfin, nous démontrons la portée de notre outil expérimental par deux voies : l'une concerne l'utilisation de l'application dans des évaluations de didactique et l'autre concerne un exemple d'extension de l'outil pour mettre en lumière un autre aspect de la Physique relativiste : la relation entre vitesse et énergie. / The Theory of Special Relativity (TSR) is a particularly counterintuitive theory. Its implications are, by nature, out of reach by human experience. Therefore we cannot perceive its effects directly, thus raising problems of comprehension for the students confronted to it. However, Virtual Reality (VR) enables us to overcome this limitation by immersing a user into a world where the velocity of light is reduced to 1 m/s. As a result, the relativistic phenomena become directly perceivable through our senses. This possibility, which is the cornerstone of our work, brings a unique way to apprehend the relativistic phenomenon trough a "hands-on" experiment.In this context, we propose, first, innovative methods to include relativistic effects in simulation containing any number of objects moving in an arbitrary direction and velocity and taking into account the relativistic dynamics of the objects, including object-to-object interaction. We focused on the relativistic phenomenon involved in the deformation of objects: the delay of propagation of the photons from the light source to the observer, as well as the relativity of length and the aberration of light. We describe, second, methods to integrate the simulation techniques, previously introduced, into an immersive environment intrinsically based on Newtonian physics. We also provide interaction methods and a concrete application in a serious game framework: a relativistic carom billiard. Finally, we demonstrate the possibilities of our platform are demonstrated in two ways: one tackles usage in the context of learning evaluation and the other is an extension of the tool to access new pieces of information relevant to TSR, such as the force profile used to launch an object with a relativistic velocity.

Modern machine learning methods, utilising neural networks, require a lot of training data. Data gathering and preparation has thus become a major bottleneck in the machine learning pipeline and researchers often use large public datasets to conduct their research (such as the ImageNet [1] or MNIST [2] datasets). As these methods begin being used in industry, these challenges become apparent. In factories objects being produced are often unique and may even involve trade secrets and patents that need to be protected. Additionally, manufacturing may not have started yet, making real data collection impossible. In both cases a public dataset is unlikely to be applicable. One possible solution, investigated in this thesis, is synthetic data generation. Synthetic data generation using physically based rendering was tested for unsupervised anomaly detection on a 3D printed block. A small image dataset was gathered of the block as control and a data generation model was created using its CAD model, a resource most often available in industrial settings. The data generation model used randomisation to reduce the domain shift between the real and synthetic data. For testing the data, autoencoder models were trained, both on the real and synthetic data separately and in combination. The material of the block, a white painted surface, proved challenging to reconstruct and no significant difference between the synthetic and real data could be observed. The model trained on real data outperformed the models trained on synthetic and the combined data. However, the synthetic data combined with the real data showed promise with reducing some of the bias intentionally introduced in the real dataset. Future research could focus on creating synthetic data for a problem where a good anomaly detection model already exists, with the goal of transferring some of the synthetic data generation model (such as the materials) to a new problem. This would be of interest in industries where they produce many different but similar objects and could reduce the time needed when starting a new machine learning project.

Aus Beeinträchtigungen der körperlichen und motorischen Entwicklung können sich in Wechselwirkung mit gesellschaftlichen Interaktionsprozessen für die Betroffenen erschwerte Bedingungen für Entwicklung und Lernen ergeben. Moderne Unterrichtskonzepte insbesondere auf der Basis eines gemäßigt konstruktivistischen Theorieverständnisses unterstützen Persönlichkeitsentwicklung, Beziehungsgestaltung und inhaltliches Lernen gleichermaßen. Im pädagogisch-therapeutischen Konzept der Themenzentrierten Interaktion (TZI) nach Ruth C. Cohn wird ein didaktischer Zugang gesehen, der curriculare, persönliche, gruppendynamische und kontextuelle Aspekte des Unterrichts berücksichtigt. Auf der theoretischen Ebene wird nach Anschlussmöglichkeiten der TZI an existierende Unterrichtskonzepte gefragt. Die empirische Studie nimmt Bezug zum Ansatz der Handlungsforschung. Für ein Schulhalbjahr erprobten drei Lehrerinnen und ein Lehrer gemeinsam mit 26 Schülerinnen und Schülern der Leipziger Schule für Körperbehinderte einen am Konzept der TZI orientierten Unterricht. Das „Mixed Methods-Design“ umfasste sowohl qualitative (Unterrichtsanalysen, problemzentrierte Interviews) als auch quantitative (testdiagnostische Erhebung des Selbstwertgefühls) Elemente. Es werden Möglichkeiten und Grenzen der Implementierung sowie mögliche Auswirkungen auf Schülerpersönlichkeit und Beziehungsqualität untersucht.

This study sought to find out the root causes of the marginalization of the physically disabled children in Machakos district of Kenya. It aimed at coming up with proposals for integrating physically disabled children into regular schools and to enhance their welfare. Through an analysis of the practice by the Small homes programme and the government s segregated special education provision, lessons for effective integration of the physically disabled children were learnt.The goal of this study was achieved by carrying out a research in Machakos district of Kenya. Data were collected by carrying out face-to-face interviews and one Focus group Discussion among a sample size of 170. The data were analysed using content analysis.The study findings show that although education is considered a basic right and need, its access and provision to the physically disabled children has experienced problems that impede its implementation. These include: - lack of clarity of the policy of integration, negative traditional beliefs towards disabilities, the approach of implementing integrated education, low parental participation, lengthy assessment procedures of disabilities, lack of adequate specialist teachers, limited data on disabilities and limited access to education caused by high fees levies, lack of suitable transport services and access to mobility aids and suitable physical environment and amenities.Further study findings show that Inclusive Education can work and that reservations to Inclusive Education can be overcome. The findings showed that the Small homes need to make their school environments least restrictive for the physically disabled children and to adapt an inclusive culture. Opposition to Special schools was based on the negative effects to the children including segregation, disruption to family life, low social and academic grounding.

The world is becoming increasingly digitized, where rapid changeovers at companies are a must to continue competing. Technological development has shown the possibilities for flexible workplaces without requirements to be at a specific physical location. Leading hybrid teams and making decisions can be challenging when they are not dependent on time and space. The purpose of this paper is to investigate how decision-making is affected by hybrid work. The study assumes leadership and decision theories such as E-leadership, strategic decision-making, and decision processes. The study has applied a qualitative case study through semi-structured interviews with eight leaders at a Swedish telecom company. The results showed that the decision-making process looks different in physical and virtual contexts. The results indicate that informal conversations and cross-examination in a physical office environment are significant for overall decision-making. This type of communication does not exist in virtual contexts, and the decision-makers have a risk of omitting important information. At the same time, there is higher efficiency in virtual decision-making meetings.

In computer graphics applications, the choice and implementation of a rendering technique is crucial when targeting real-time performance. Traditionally, rasterization-based approaches have dominated the real-time sector. Other algorithms were simply too slow to compete on consumer graphics hardware. With the addition of hardware support for ray-intersection calculations on modern GPUs, hybrid ray tracing/rasterization and purely ray tracing approaches have become possible in real-time as well. Industry real-time graphics applications, namely games, have been exploring these different rendering techniques with great levels of success. The addition of ray tracing into the graphics developer’s toolkit has without a doubt increased what level of graphical fidelity is achievable in real-time. In this thesis, three rendering techniques are implemented in a custom rendering engine built on the Vulkan® Explicit API. Each technique represents a different family of modern real-time rendering algorithms. A largely rasterization-based method, a hybrid ray tracing/rasterization method, and a method solely using ray tracing. Both the hybrid and ray tracing exclusive approach rely on the ReSTIR algorithm for lighting calculations. Analysis of the performance and render quality of these approaches reveals the trade-offs incurred by each approach, alongside the performance viability of each in a real-time setting.

No description available.

Using an ecological perspective, the current research developed a theoretical framework that suggests that environmental and personal resources related to physically active leisure, as well as the interactions between them, contribute to well-being. A distance-running event was examined as an environmental resource for enhancing global life satisfaction, a key measure of subjective well-being. In contrast, the constructs of behavioral involvement and psychological involvement were used to measure personal resources resulting from physically active leisure. The proposed framework was tested with a set of three studies in which participants were recruited through a survey panel from a 10-mile distance-running event in the US. Study 1 performed a partial least squares structural equation modeling analysis to examine whether the distance-running event contributed to behavioral and psychological involvement and whether such involvement, in turn, promoted global life satisfaction. By using longitudinal data over a 5-month period, Study 2 used a latent growth modeling approach to investigate whether the distance running event was able to enhance participants' psychological involvement and whether such change promoted global life satisfaction. Study 3 conducted a moderated mediation analysis to examine the influence of personality, behavioral and psychological involvement, and two environmental resources of the distance running event and an organized running club on global life satisfaction. The results of the three studies suggest that a distance-running event can serve as an environmental resource that promotes participants' behavioral involvement and psychological involvement in the activity. The results also indicate that psychological involvement plays an important role in promoting global life satisfaction, whereas behavioral involvement may be insufficient to promote global life satisfaction. Overall, the current research contributes to the sport management and leisure literature by providing scholars with a new way of understanding the benefits of physically active leisure. The findings from the current research also provide practical implications for government and community leaders to enhance people's well-being by promoting physically active leisure in their cities and communities. / Tourism and Sport