Modern life, which is characterised by automation and mechanisation, causes laziness and inactivity in people all over the world. It in essence deprives one of movement, which negatively affects man and his body. Chronic illnesses caused by an inactive lifestyle lead to unnecessary deaths, which again impacts negatively on the community as a whole. The South African Police Service (SAPS) has far from escaped this worldwide phenomenon. It is, in fact, experiencing an abnormally high death rate, which can be linked directly to police officers’ lifestyle. This study has proven that the average police officer is in extremely poor physical condition, and that this is in all probability the cause of the unusually high natural death rate as well as the high incidence of suicide among SAPS members. The primary objective of this study is the justification of a physical maintenance programme for law enforcement officers. For this programme to be successful, it has to: (i) be relatively inexpensive and provide easily accessible facilities; (ii) be in line with critical physical job requirements; (iii) contribute directly to the maintenance of job-oriented fitness; (iv) include a section that is solely tasked with the physical maintenance of the officers; and (v) form part of the SAPS’s policy on sport. The results of this study show the dire necessity of the immediate implementation by SAPS management of the suggested physical maintenance programme. / Thesis (DPhil (Human Movement Science))--University of Pretoria, 2003. / Biokinetics, Sport and Leisure Sciences / unrestricted

<div>The Internet-of-Things (IoT) is one of the fastest-growing technologies in computing, revolutionizing several application domains such as wearable computing, home automation, industrial manufacturing, <i>etc</i>. This rapid proliferation, however, has given rise to a plethora of new security and privacy concerns. For example, IoT devices frequently access sensitive and confidential information (<i>e.g.,</i> physiological signals), which has made them attractive targets for various security attacks. Moreover, with the hardware components in these systems sourced from manufacturers across the globe, instances of counterfeiting and piracy have increased steadily. Security mechanisms such as device authentication and key exchange are attractive options for alleviating these challenges.</div><div><br></div><div>In this dissertation, we address the challenge of enabling low-cost and low-overhead device authentication and key exchange in off-the-shelf embedded systems. The first part of the dissertation focuses on a hardware-intrinsic mechanism and proposes the design of two Physically Unclonable Functions (PUFs), which leverage the memory (DRAM, SRAM) in the system, thus, requiring minimal (or no) additional hardware for operation. Two lightweight authentication and error-correction techniques, which ensure robust operation under wide environmental and temporal variations, are also presented. Experimental results obtained from prototype implementations demonstrate the effectiveness of the design. The second part of the dissertation focuses on the application of these techniques in real-world systems through a new end-to-end authentication and key-exchange protocol in the context of an Implantable Medical Device (IMD) ecosystem. Prototype implementations exhibit an energy-efficient design that guards against security and privacy attacks, thereby making it suitable for resource-constrained devices such as IMDs.</div><div><br></div>

La presente investigación es de alcance correlacional, es decir tiene como propósito conocer la influencia de la variable independiente estilos de liderazgo en la variable dependiente desarrollo deportivo de los paradeportistas. El diseño no experimental de corte transversal es decir no se manipularán las variables de investigación, el recojo de información se dará en un solo momento. El paradeportista del cual se va a obtener su percepción sobre el estilo de liderazgo del comando técnico. Para cumplir con el objetivo y medir las variables de investigación se utilizó el método cuantitativo a través de la herramienta encuesta tipo Likert a 199 paradeportistas. El análisis de fiabilidad de nuestras variables, se obtuvo un 0,905 demostrando que el instrumento de medición es estadísticamente fiable y veraz ya que supera el 0,7. Distribución no es normal por lo tanto se ha obtenido el r de Pearson y la regresión lineal. Existe asociación entre las variables y la significancia aprueba las hipótesis alternas. Las conclusiones, en las hipótesis la relación es directa porque a mayor liderazgo del Comando Técnico habrá mayor desarrollo deportivo de los paradeportistas y en el baloncesto sobre silla de ruedas no existe asociación entre las variables y tampoco se puede generalizar, solo en este caso se aprueba la hipótesis nula. / This research is correlational in scope, that is, its purpose is to know the influence of the independent variable leadership styles on the dependent variable sports development of paraathletes. The non-experimental cross-sectional design means that the research variables will not be manipulated, the information will be collected in a single moment. The para-athletes whose perception of the leadership style of the technical command will be obtained. To meet the objective and measure the research variables, the quantitative method was adapted through the Likert-type survey tool to 199 paraathletes. The reliability analysis of our variables, a 0.905 was obtained, demonstrating that the measurement instrument is statistically reliable and truthful since it exceeds 0.7. Distribution is not normal; therefore, Pearson's r and linear regression have been obtained. There is an association between the variables and the significance approves the alternative hypotheses. The conclusions, in the hypotheses, the relationship is direct because the greater the leadership of the Technical Command there will be greater sports development of the para-athletes and in wheelchair basketball there is no association between the variables and it cannot be generalized either, only in this case it is approved the null hypothesis. / Tesis

Disertační práce se zabývá modelováním znečištění ovzduší, jeho transportních a disperzních procesů ve spodní části atmosféry a zejména numerickými metodami, které slouží k řešení těchto modelů. Modelování znečištění ovzduší je velmi důležité pro předpověď kontaminace a pomáhá porozumět samotnému procesu a eliminaci následků. Hlavním tématem práce jsou metody pro řešení modelů popsaných parciálními diferenciálními rovnicemi, přesněji advekčně-difúzní rovnicí. Polovina práce je zaměřena na známou metodu přímek a je zde ukázáno, že tato metoda je vhodná k řešení určitých konkrétních problémů. Dále bylo navrženo a otestováno řešení paralelizace metody přímek, jež ukazuje, že metoda má velký potenciál pro akceleraci na současných grafických kartách a tím pádem i zvětšení přesnosti výpočtu. Druhá polovina práce se zabývá poměrně mladou metodou ELLAM a její aplikací pro řešení atmosférických advekčně-difúzních rovnic. Byla otestována konkrétní forma metody ELLAM společně s navrženými adaptacemi. Z výsledků je zřejmé, že v mnoha případech ELLAM překonává současné používané metody.

[pt] Com o avanço do poder de processamento gráfico e a popularização dos jogos eletrônicos, começam a surgir novas formas de entretenimento, entre elas a de espectadores de jogos. Os requisitos para o posicionamento de câmera para os espectadores visualizarem os jogos são diferentes dos aplicados aos jogadores. Enquanto a câmera para os jogadores deve atender a requisitos de jogabilidade, a câmera para os espectadores deve explorar diferentes ângulos de visualização a fim de aumentar a imersão no ambiente dos jogos e explorar a emoção das cenas. O cinema já evoluiu toda uma linguagem cinematográfica que potencializa a interpretação de cenas. Pesquisas recentes procuram usar a cinematografia na visualização de jogos. O principal desafio na adaptação da cinematografia para os jogos reside na existência de um ambiente dinâmico, onde não se pode prever o andamento da história. Podemos identificar três módulos para a adaptação da cinematografia em jogos: roteirista, responsável por identificar o que está ocorrendo na cena; diretor/editor, responsável por definir as melhores tomadas para capturar a cena; cinegrafista, responsável por posicionar a câmera no ambiente dinâmico para melhor atender às demandas do módulo diretor/editor. Este trabalho propõe a implementação de um módulo cinegrafista. A partir de requisitos para o posicionamento da câmera oriundos de um módulo externo, propõe-se um modelo de câmera que faz o posicionamento automático da câmera. Os requisitos de posicionamento são expressos em um conjunto de restrições que devem ser atendidas pelo modelo de câmera. A câmera usa um modelo físico baseado em um sistema de partículas regido pelo método de Verlet, empregando o método de relaxação para a convergência do sistema a fim de atender às restrições impostas. Experimentos computacionais demonstram a capacidade do módulo proposto de atender a sofisticadas regras de posicionamento de câmera, baseando-se em composições de restrições simples. Princípios da cinematografia, como enquadramento, posicionamento e movimento de câmeras, e respeito à linha de ação, são facilmente respeitados pelo módulo proposto. / [en] With the evolution in graphics processing power and the popularization of electronic games, new forms of entertainment, such as being a game spectator. The requirements for positioning the camera for the spectators to view the games are different from those applied to players. The camera for the players must fulfill playability requirements, while the camera for the spectators must explore different viewing angles in order to increase the immersion in the game environment and to explore the thrill of the scenes. The cinema has evolved a whole cinematographic language that optimizes the scene interpretation. Recent research has been seeking to apply cinematography to game visualization. The main challenge in the adaptation of the cinematographic language for games lies in the existence of a dynamic environment in which the story`s progress cannot be anticipated. Three modules can be identified to adopt the cinematographic language in games: screenwriter, responsible for identifying what is happening in the scene; director/editor, responsible for defining the best takes to capture the scene; and cinematographer, responsible for positioning the camera in the dynamic environment to better comply with the director/editor`s demands. The present work proposes the implementation of a cinematographer module. Based on camera position requirements obtained from an external module, we propose a camera model that automatically positions the camera. The positioning requirements are expressed by a set of constraints that must be respected by the camera model. The camera uses a physical model based on a particle system oriented by Verlet`s method, and employs the relaxation method to obtain the system`s convergence in order to comply with imposed constraints. Computational experiments have demonstrated the capacity of the proposed module to comply with sophisticated camera positioning rules based on compositions of simple constraints. Cinematography principles such as framing, camera position and movement, and respecting the line of action are easily accomplished by the proposed module.

No description available.

Flood forecasting maps are essential for rapid disaster response and risk management, yet the computational complexity of physically-based simulations hinders their application for efficient high-resolution spatial flood forecasting. To address the problems of high computational cost and long prediction time, this thesis proposes to develop deep learning neural networks based on a flood simulation dataset, and explore their potential use for flood prediction without learning hydrological modelling knowledge from scratch.  A Fully Convolutional Network (FCN), FCN with multiple outputs (Multioutput FCN), UNet, Graph-based model and their Recurrent Neural Network (RNN) variants are trained on a catchment area with twelve rainfall events, and evaluated on two cases of a specific rainfall event both quantitatively and qualitatively. Among them, Convolution-based models (FCN, Multioutput FCN and UNet) are commonly used to solve problems related to spatial data but do not encode the position and orientation of objects, and Graph-based models can capture the structure of the problem but require higher time and space complexity. RNN-based models are effective for modelling time-series data, however, the computation is slow due to its recurrent nature. The results show that Multioutput FCN and the Graph-based model have significant advantages in predicting deep water depths (&gt;50 cm), and the application of recurrent training greatly improves the long-term flood prediction accuracy of the base deep learning models. In addition, the proposed recurrent training FCN model performs the best and can provide flood predictions with high accuracy.

No description available.

京都大学 / 新制・課程博士 / 博士(情報学) / 甲第25444号 / 情博第882号 / 新制||情||148(附属図書館) / 京都大学大学院情報学研究科通信情報システム専攻 / (主査)教授 佐藤 高史, 教授 橋本 昌宜, 教授 新津 葵一 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DFAM

Text in Afrikaans with summaries in Afrikaans and English / The child in his middle childhood years are confronted with physical, emotional, psychological and intellectual demands. The support from his parents enables him to make changes by using them as male and female role models. With a physically absent father the child has to face his absence and learn to handle it. The aim of this study was to investigate the child in the middle childhood’s experience of a physically absent father. Semi-structured interviews were conducted with thirteen respondents within the middle childhood years with the aim to explore their perceptions, experiences and how they manage with a physically absent father. The data collected during the empirical study was analyzed and compared with existing literature as a control mechanism. The study was completed with conclusions and recommendations that could be of value during an intervention with children in the middle childhood years experiencing a physically absent father. / Social Work / M.Diac. (Spelterapie)