This project mainly refers to use of the Java programming language for developing web application for organizing challenges focused on biomedical data. The project is focused on the comparison and selection of tools for developing and running application on server. The project includes a database schema, source code of application and basic development documentation.

The work deals with the implementation of the specific architecture to detect anomalies in the classroom or in commercial use. The system consists of three parts: Measurement module, mobile applications and server part. Transmission between the measuring module of the server and the evaluation is carried out simultaneously with the visuals on the mobile device. All system components are implemented with the minimum cost and maximum expandability. All the necessary computing power is concentrated in the server part because of usability with multiple simultaneously operating mobile clients. Emphasis is placed on the solution architecture and the possibility of using the system as a whole, or selected portions separately. Finally, experiments are designed for the presentation of selected methods for anomaly detection.

The topic of this master´s thesis is the strain-stress analysis of the spacer-spring for the swivel light projector of car headlamp. The spacer-spring is used for delimitation of moving swivel light projector in relation to turning drive. During vibration test there is a danger of limit state of fatigue failure.

The subject of this thesis is the topic of the resilience and stability of web applications with a focus on the Java platform. Many existing information systems based not only upon this platform face problems that disturb the stability of applications. These problems may result in the failure, downtime and, consequently, financial or business loss due to the malfunction of the whole service. The aim is to show the problems that the applications face in a production environment and to show how to address them proactively. A possible partial solution to increase the stability may be an appropriate configuration of JVM (Java Virtual Machine), an analysis and corrections of detected errors, or a technique called Sandboxing to increase the stability, which this thesis deals with. Using this technique, it is possible to divide the application into separate parts that cannot influence each other. This prevents the propagation of errors among the parts of the application and thereby increases the stability of the entire application. The target applications include the Java applications made with the help of Spring framework. The Sanboxing technique can be implemented into the applications built this way by means of suitable configuration, which ensures that the application run will be divided into specified parts that will be automatically tested and possibly restarted. The application then recovers itself in the affected areas without a complete failure. The project is called Java Capsules.

This thesis deals with the background of the design of a highly available, scalable and modular content management system based on the Java EE platform and the OSGi framework and with the implementation of the designed system. It describes the design and implementation of the application decomposition to modules, their communication and bindings. Finally, it presents the results of the application testing and proposes available extensions of the application.

This Diploma Thesis introduces the basic concepts of reputation and trust, reputation systems and problems of multi-contextual models of reputation. It also describes practical aspects of multi-contextual models in web environment. Described contextual models are then used for design and implementation of real web application.

This Master's thesis describes design and implementation of advanced web crawler. This crawler can be configured by user and is designed for web browsing according to specified parameters. Can acquire and evaluate content of web pages. Its configuration is performed by creating projects which are consisting of different types of steps. User can create simple action like downloading page, form submission, etc. or can create more complex and larger projects.

This essay aims to examine how the democratization of Tunisia has taken place since the Arabic spring. It will also analyze how well the country qualifies as a consolidated democracy and what conflicts that have been the driving force of the democratization process. The essay is a qualitive case study and explores the years of 1987 to 2018. Moreover, it is supported by the democratization theory of Dankward A Rustow. The Arabic spring was a consequence of the high unemployment numbers, the poverty in the country and the discontent of the president’s approach of ruling. The road to the democracy has suffered from many difficulties due to influences of the previous authoritarian rule. The situation in Tunisia after the Arabic spring has been unstable and demonstrations in smaller scales has taken place. Today the country has free and fair elections regularly and 2014 a new constitution was introduced. However, people have not gained a better lifestyle from the democratization even though the democracy has flourished. Lastly, the Tunisian democracy is not yet consolidated and still needs to the implemented into the country’s laws and population.

The aim of this study is to investigate the use of multi-body vehicle simulation models to predict the suspension forces acting on the chassis of the vehicle, in order to perform durability analyses. Traditionally, durability of vehicles is evaluated with proving ground tests. This implies that a physical prototype of the vehicle is required before its durability can be evaluated. If we were able to evaluate the durability of the vehicle without any physical part or a full prototype of the vehicle available, great cost and time savings may be gained. These possible gains have lead to the use of computer aided engineering (CAE) tools. These tools have supplemented the proving ground durability test by using historical measured data and/or predicted data from vehicle simulation models, as input to the durability analyses i.e. Finite Element Analyses (FEA). The usefulness of the historical test data is limited and many of the vehicle simulation models that are used to predict the input data, have not been validated. In this study a validated mathematical model of a 40 ton flat bed tri-axle semi-trailer, able to predict the suspension forces, is created. The validation of the full vehicle model includes correlations for displacements, velocities, accelerations and forces of various vehicle parameters. A validated mathematical model of the air springs, that includes mass transfer and flow effects for use in full vehicle dynamic simulations, is also developed. The results obtained indicate that the air spring model, integrated into the full vehicle model, is able to give relative accurate predictions of displacements, velocities, accelerations and forces of various vehicle parameters, over a discrete road event and over a rough road. / Dissertation (MEng)--University of Pretoria, 2009. / Mechanical and Aeronautical Engineering / Unrestricted

La nécessité de simulations de tissus mous, tels que les organes internes, se pose avec le progrès des domaines scientifiques et médicaux. Le but de ma thèse est de développer un nouveau modèle générique, topologique et physique, pour simuler les organes humains. Un tel modèle doit être facile à utiliser, doit pouvoir effectuer des simulations en temps réel avec un niveau de précision permettant l'utilisation à des fins médicales. Cette thèse explore de nouvelles méthodes de simulation et propose des améliorations pour la modélisation de corps déformables. Les méthodes proposées visent à pouvoir effectuer des simulations rapides, robustes et fournissant des résultats physiquement précis. L'intérêt principal de nos solutions réside dans la simulation de tissus mous élastiques a petites et grandes déformations à des fins médicales. Nous montrons que pour les méthodes existantes, la précision pour simuler librement des corps déformables ne va pas de pair avec la performance en temps de calcul. De plus, pour atteindre l'objectif de simulation rapide, de nombreuses approches déplacent certains calculs dans une étape de pré-traitement, ce qui entraîne l'impossibilité d'effectuer des opérations de modification topologiques au cours de la simulation comme la découpe ou le raffinement. Dans cette thèse, le cadre utilisé pour les simulations s'appelle TopoSim. Il est conçu pour simuler des matériaux à l'aide de systèmes masses-ressorts (MSS) avec des paramètres d'entrée spécifiques. En utilisant un MSS, qui est connu pour sa simplicité et sa capacité à effectuer des simulations temps réel, nous présentons plusieurs améliorations basé physiques pour contrôler les fonctionnalités globales du MSS qui jouent un rôle clé dans la simulation de tissus réels. La première partie de ce travail de thèse vise à reproduire une expérience réelle de simulation physique qui a étudié le comportement du tissu porcin à l'aide d'un rhéomètre rotatif. Son objectif était de modéliser un corps viscoélastique non linéaire. A partir de l'ensemble des données acquises, les auteurs de l'expérience ont dérivé une loi de comportement visco-élastique qui a ensuite été utilisée afin de la comparer avec nos résultats de simulation. Nous définissons une formulation des forces viscoélastiques non linéaires inspirée de la loi de comportement physique. La force elle-même introduit une non linéarité dans le système car elle dépend fortement de l'amplitude de l'allongement du ressort et de trois paramètres spécifiques à chaque type de tissu. La seconde partie de la thèse présente notre travail sur les forces de correction de volume permettant de modéliser correctement les changements volumétriques dans un MSS. Ces forces assurent un comportement isotrope des solides élastiques et un comportement correct du volume quel que soit la valeur du coefficient de Poisson utilisé. La méthode nécessite de résoudre deux problèmes: l'instabilité provoquant des plis et les contraintes de Cauchy. Nos solutions à ces limitations impliquent deux étapes. La première consiste à utiliser trois types de ressorts dans un maillage entièrement hexaédrique: les arêtes, les faces diagonales et les diagonales internes. Les raideurs des ressorts dans le système ont été formulées pour obéir aux lois mécaniques de base. La deuxième étape consiste à ajouter des forces de correction linéaires calculées en fonction du changement de volume et des paramètres mécaniques du tissu simulé, à savoir le coefficient de Poisson et le module de Young [etc…] / The need for simulations of soft tissues, like internal organs, arises with the progress of the scientific and medical environments. The goal of my PhD is to develop a novel generic topological and physical model to simulate human organs. Such a model shall be easy to use, perform the simulations in the real time and which accuracy will allow usage for the medical purposes.This thesis explores novel simulation methods and improvement approaches for modeling deformable bodies. The methods aim at fast and robust simulations with physically accurate results. The main interest lies in simulating elastic soft tissues at small and large strains for medical purposes. We show however, that in the existing methods the accuracyto freely simulate deformable bodies and the real-time performance do not go hand in hand. Additionally, to reach the goal of simulating fast, many of the approaches move the necessary calculations to pre-computational part of the simulation, which results in inability to perform topological operations like cutting or refining.The framework used for simulations in this thesis is designed to simulate materials using Mass Spring Systems (MSS) with particular input parameters. Using Mass-Spring System, which is known for its simplicity and ability to perform fast simulations, we present several physically-based improvements to control global features of MSS which play the key role in simulation of real bodies