L'objectif de cette thèse est l'étude d'un environnement d'exécution pour machines parallèles sans mémoire commune. Elle comprend la définition d'un modèle de programme parallèle, basé sur l'échange de message offrant une forme restreinte de mémoire partagée. La communication est indirecte, via des portes; les processus utilisent les barrières pour la synchronisation. Les entités du système. processus, portes et barrières, sont créées dynamiquement, et placées sur un processeur quelconque du réseau de processeurs de façon explicite. Nous proposons une implantation de ce modèle comme la mise en oeuvre systématique d'une architecture client/serveur. Cette implantation a été efféctuée sur une machine Supemode. La base est un Micro Noyau Parallèle, où le composant principal est un mécanisme d'appel de procédure à distance minimal. / This thesis describes an execution environment for parallel machines without shared memory. A parallel programming model based on message passing, with a special shared memory. In this model, process communication occurs indirectly, via ports, and the processes use barriers for synchronization. All the entities of the system, such as processes, ports and barriers, are created dynamically and loaded on any processor of the network of processors. The implementation architecture of our model is a systematic realization of the client/server model. An implementation is proposed in a Supernode parallel machine as a parallel micro kernel. The principal parallel micro kernel component is a minimal remote procedure call mechanism.

L'objectif de cette thèse est l'étude d'un environnement d'exécution pour machines parallèles sans mémoire commune. Elle comprend la définition d'un modèle de programme parallèle, basé sur l'échange de message offrant une forme restreinte de mémoire partagée. La communication est indirecte, via des portes; les processus utilisent les barrières pour la synchronisation. Les entités du système. processus, portes et barrières, sont créées dynamiquement, et placées sur un processeur quelconque du réseau de processeurs de façon explicite. Nous proposons une implantation de ce modèle comme la mise en oeuvre systématique d'une architecture client/serveur. Cette implantation a été efféctuée sur une machine Supemode. La base est un Micro Noyau Parallèle, où le composant principal est un mécanisme d'appel de procédure à distance minimal. / This thesis describes an execution environment for parallel machines without shared memory. A parallel programming model based on message passing, with a special shared memory. In this model, process communication occurs indirectly, via ports, and the processes use barriers for synchronization. All the entities of the system, such as processes, ports and barriers, are created dynamically and loaded on any processor of the network of processors. The implementation architecture of our model is a systematic realization of the client/server model. An implementation is proposed in a Supernode parallel machine as a parallel micro kernel. The principal parallel micro kernel component is a minimal remote procedure call mechanism.

L'objectif de cette thèse est l'étude d'un environnement d'exécution pour machines parallèles sans mémoire commune. Elle comprend la définition d'un modèle de programme parallèle, basé sur l'échange de message offrant une forme restreinte de mémoire partagée. La communication est indirecte, via des portes; les processus utilisent les barrières pour la synchronisation. Les entités du système. processus, portes et barrières, sont créées dynamiquement, et placées sur un processeur quelconque du réseau de processeurs de façon explicite. Nous proposons une implantation de ce modèle comme la mise en oeuvre systématique d'une architecture client/serveur. Cette implantation a été efféctuée sur une machine Supemode. La base est un Micro Noyau Parallèle, où le composant principal est un mécanisme d'appel de procédure à distance minimal. / This thesis describes an execution environment for parallel machines without shared memory. A parallel programming model based on message passing, with a special shared memory. In this model, process communication occurs indirectly, via ports, and the processes use barriers for synchronization. All the entities of the system, such as processes, ports and barriers, are created dynamically and loaded on any processor of the network of processors. The implementation architecture of our model is a systematic realization of the client/server model. An implementation is proposed in a Supernode parallel machine as a parallel micro kernel. The principal parallel micro kernel component is a minimal remote procedure call mechanism.

Informationen des Universitätsrechenzentrums mit Jahresrückblick 2007 zu den aktuellen Projekten und Diensten des URZ

Jahresbericht der Universitätsbibliothek Chemnitz - Berichtsjahr 2004 / Annual report of the University Library of Chemnitz in 2004

This paper takes a closer look and conducts a   comparison of two different approaches to generate interactivity of web   applications today, namely server or client side generation. The overall   purpose of the comparison is to help determine which approach is best suited   to generate maximum business advantage to least possible time cost. The   perspective used to measure this is usability seen from a developer's point   of view. The time it takes to acquaint oneself with a framework may vary on   several aspects and therefore a demarcated scenario has been set up and   individual parts have been evaluated side by side in the frameworks JSF and   Angular.io. Together with interviews of developer’s gathered experiences a   result has been possible to assemble. This result speaks neither for or   against either of the two approaches as both techniques have their own   advantages and disadvantages. What has been most prominent in the comparison   however is the introduction of the design pattern Model View Controller in a   framework for client side generation as Angular.io. This results in a similar   experience in usability as in a corresponding framework for server side   generation as JSF, which is good in an efficiency point of view. Still, the   lack of relevant error messages is experienced as a big problem in client   side frameworks and is an issue which stands out negatively in the   comparison. / Detta arbete avser titta närmare på och jämföra två   vanliga tillvägagångssätt för att skapa interaktivitet via webbsidor idag,   nämligen server- och klientsidegenerering. Det övergripande syftet med   undersökningen är att hjälpa till att utröna vilket tillvägagångssätt som är   bäst anpassat för att generera maximal affärsnytta till minsta möjliga   tidskostnad. Perspektivet som används för att mäta detta är usability ur   utvecklarsynpunkt. Tiden att sätta sig in i ett ramverk kan bero på ett   flertal aspekter och därför har en avgränsat scenario satts upp och   individuella delar har utvärderats sida vid sida i ramverken JSF och   Angular.io. Tillsammans med intervjuer av utvecklares samlade upplevelse har   ett resultat kunnat sammanställas. Detta resultat talar vare sig för eller   emot endera tillvägagångssätt då båda tekniker har sina för- och nackdelar.   Det som dock har varit mest framträdande i jämförelsen är att införandet av   designmönstret Model View Controller i ett ramverk för klientsidegenerering   så som Angular.io. Detta ger en likartad upplevelse i usability som ett   motsvarande för serversidegenererande så som JSF, vilket är bra ur   effektivitetssynpunkt. Dock upplevs bristen på relevanta felmeddelanden som   ett stort problem på klientsidegenererande ramverk och något som sticker ut   negativt i jämförelsen.

The presented work concerns problems of more effective using hardware and also free software. The first part of my work presents generally free GNU/Linux distributions and this part is concentrated on two distributions. The first is Red Hat Enterprise Linux which is installed in the server of the hospital information system Clinicom. The second is live distribution Slax that is used for testing of terminal connection to the hospital information system Clinicom. The second part of my work is generally concentrated on the hospital information systems and there is presented the firm SMS solution at the end. It is the hospital information system Clinicom. The next part is generally concentrated on the workload server monitoring. It monitors both userlogins and allocated memory size. Then there are discused problems of solution of unthought-of events, for example blackout, and the one solution is described there. The last part is concentrated on implementation of the security connection to the hospital information system Clinicom and it presents live distribution Slax as distribution for thin client.

The objective of this master’s thesis was to describe current capabilities of anonymous browsing over the Internet. The theoretical part focuses on three main methods of anonymization with main focus on Tor network. The master‘s thesis describes advantages and disadvantages of different solutions and possible attacks on them. In the next part is demonstrated Tor network, implementation of Hidden service and secured access to the server for clients and possible attacks against this proposal. The work also includes the results of measurements of all three anonymizers and the effects on their speed.

Nowadays the information system of dynamically developing companies has an increasingly important role. The aim of this thesis is to evaluate current information system used in Brněnské komunikace a.s., analyze its drawbacks and weak spots and then propose steps leading to its improvement and thus to increase the company´s performance.

Nowadays the information system of dynamically developing companies has an increasingly important role. IS MFG PRO of Fei Company will not be easy to criticize. Thesis will try to direct on coincident state. Thesis will try to find out it´s positives and negatives and according to this informations it will contained changes suggestions whitch can be profitable in state of effectivity to company.