La gestion de l'acheminement de messages d'e-santé en environnement ubiquitaire soulève plusieurs défis majeurs liés à la diversité et à la spécificité des cas d'usage et des acteurs, à l'évolutivité des contextes médical, social, logistique, environnemental...Nous proposons une méthode originale d'orchestration autonome et auto-adaptative de services visant à optimiser le flux des messages et à personnaliser la qualité de transmission, en les adressant aux destinataires les plus appropriés dans les délais requis. Notre solution est une architecture générique dirigée par des modèles du domaine d'information considéré et des données contextuelles, basés sur l'identification des besoins et des contraintes soulevées par notre problématique.Notre approche consiste en la composition de services de fusion et de gestion dynamique en temps réel d'informations hétérogènes provenant des écosystèmes source, cible et message, pilotés par des méthodes d'intelligence artificielle pour l'aide à la prise de décision de routage. Le but est de garantir une communication fiable, personnalisable et sensible à l'évolution du contexte, quel que soit le scénario et le type de message (alarme, technique, etc.). Notre architecture, applicable à divers domaines, a été consolidée par une modélisation des processus métiers (BPM) explicitant le fonctionnement des services qui la composent.Le cadriciel proposé est basé sur des ontologies et est compatible avec le standard HL7 V3. L'auto-adaptation du processus décisionnel d'acheminement est assurée par un réseau bayésien dynamique et la supervision du statut des messages par une modélisation mathématique utilisant des réseaux de Petri temporels / Routing policy management of eHealth messages in ubiquitous environment leads to address several key issues, such as taking into account the diversity and specificity of the different use cases and actors, as well as the dynamicity of the medical, social, logistic and environmental contexts.We propose an original, autonomous and adaptive service orchestration methodology aiming at optimizing message flow and personalizing transmission quality by timely sending the messages to the appropriate recipients. Our solution consists in a generic, model-driven architecture where domain information and context models were designed according to user needs and requirements. Our approach consists in composing, in real time, services for dynamic fusion and management of heterogeneous information from source, target and message ecosystems, driven by artificial intelligence methods for routing decision support. The aim is to ensure reliable, personalized and dynamic context-aware communication, whatever the scenario and the message type (alarm, technical, etc.). Our architecture is applicable to various domains, and has been strengthened by business process modeling (BPM) to make explicit the services operation.The proposed framework is based on ontologies and is compatible with the HL7 V3 standard. Self-adaptation of the routing decision process is performed by means of a dynamic Bayesian network and the messages status supervision is based on timed Petri nets

O desenvolvimento e a utilização de ambientes computacionais como apoio ao ensino e aprendizagem, aliados à evolução da computação móvel, têm contribuído significativamente para o estabelecimento de uma nova modalidade de ensino conhecida como aprendizagem móvel ou mobile learning (m-learning). Nesse cenário emergente, os ambientes educacionais existentes, mesmo possuindo diversos benefícios e facilidades no que diz respeito ao ensino e aprendizagem, apresentam problemas e desafios que precisam ser explorados. Um dos aspectos relevantes a ser investigado refere-se ao estabelecimento e adoção de padrões arquiteturais. De fato, grande parte desses ambientes é construída de forma isolada, possuindo arquiteturas e estruturas próprias, o que pode impactar negativamente a capacidade de padronização. O presente trabalho de pesquisa insere-se neste contexto, tendo como principal objetivo investigar e definir uma arquitetura de referência orientada a serviço voltada para ambientes de aprendizagem móvel. Tal arquitetura, denominada Ref-mLearning, visa contribuir para a evolução, reúso e interoperabilidade desses ambientes, possibilitando ainda um aumento na qualidade e redução de custos durante o seu desenvolvimento. Resultados alcançados por meio de avaliações e condução de um estudo de caso demonstram que a Ref-mLearning é uma arquitetura viável possuindo uma boa estrutura e organização para o desenvolvimento de ambientes de aprendizagem móvel orientados a serviço. / The development and use of computational environment to support the teaching and learning, together with the evolution of mobile computing, have contributed significantly to the establishment of a new mode of teaching known as mobile learning (m-learning). In this emerging scenario, the existing educational environments, despite having various benefits and facilities with regard to teaching and learning, present problems and challenges that need to be explored. An important aspect to be investigated refers to the establishment and adoption of architectural patterns. In fact, many of these environments is built in isolation, possessing own architectures and structures, which may negatively impact the standardization capacity. This research work is part of this context, the main objective to investigate and define a service-oriented reference architecture for mobile learning environments. Such an architecture, called Ref-mLearning, aims to contribute to the evolution, reuse and interoperability of these environments, still enabling an increase in quality and cost reduction during its development. Results achieved through evaluations and conducting a case study show that Ref-mLearning is a viable architecture having a good structure and organization for the development of a service-oriented mobile learning environment.

Submitted by Irene Nascimento (irene.kessia@ufpe.br) on 2016-08-30T17:54:00Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Karina_CIN.pdf: 1045991 bytes, checksum: ab1e6ae77770903f6c88d33b95b07d99 (MD5) / Made available in DSpace on 2016-08-30T17:54:00Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Karina_CIN.pdf: 1045991 bytes, checksum: ab1e6ae77770903f6c88d33b95b07d99 (MD5) Previous issue date: 2015-07-27 / Os Web Services são componentes de software que se utilizam de tecnologias e protocolos abertos: XML, SOAP, WSDL e UDDI, para fornecer seus serviços. Atualmente, os Web Services surgem como alternativa para melhorar a comunicação entre os sistemas. Esta dissertação apresenta uma reestruturação arquitetural de Web Service - em funcionamento há quatro anos, cuja finalidade do seu serviço visa possibilitar que operações DML sejam realizadas em diferentes bases de dados de forma transparente para os usuários - fazendo uso de refatoração e padrões de projetos, garantindo que os fatores de qualidade: manutenibilidade, confiabilidade, eficiência e portabilidade, sejam mantidos. Os objetivos propostos podem ser sintetizados no entendimento e caracterização das funcionalidades e das tecnologias que envolvem os Web Services; estudos e pesquisas para descobrir quais padrões de projetos e refatoração podem ser utilizados na implementação do Web Services, possibilitando desta forma que boas práticas de desenvolvimento sejam adotadas; definir quais fatores de qualidade podem ser utilizados no processo de validação, além de, realizar avaliações e testes de Web Service fazendo uso de ferramentas Open Source; e finalmente, analisar se os resultados obtidos após o uso destes padrões na implementação do Web Service são satisfatórios. Para alcançar os objetivos propostos foi realizada uma análise da arquitetura do Web Service, por meio da engenharia reversa e análise de código. Após esta análise, refatorações e padrões de projetos foram definidos e utilizados na nova arquitetura para a implementação do novo Web Service, com o intuito de prover e garantir os fatores de qualidade: manutenibilidade, confiabilidade, eficiência e portabilidade. E por fim, testes de desempenho, carga/stress e funcional foram realizados com auxílio de ferramentas Open Source, JMeter e SoapUI, nos dois Web Services, para posteriormente seus resultados serem analisados. Os resultados obtidos, após a realização de teste e avaliação comparativa entre os dois Web Services, demonstraram uma melhora na qualidade dos serviços fornecidos pelo Web Service reestruturado, além de proporcionar redução de custo de manutenção. Assim sendo, este estudo constatou que refatoração e padrões de projetos podem ser utilizados na implementação de Web Service. / Web Services are software components that use open technologies and protocols like XML, SOAP, WSDL and UDDI, to provide its services. Currently, Web Services are an alternative to improve communication between the systems. This dissertation presents a Web Service architectural restructuring – in operation for four years, for the purpose of its service aims to enable DML operations are performed on different databases transparently to users – making use of refactoring and design patterns, ensuring that the factors of quality: maintainability, reliability, efficiency and portability are kept. The objectives proposed can be synthesized in the understanding and characterization of the features and technologies involving Web Services; study and research to find out which design patterns and refactoring can be used in the implementation of the Web Service, enabling this way that good development practices are adopted. We also identify quality factors that can be used in the validation process, as well as we carry out evaluations and testing of Web Service using Open Source tools. Finally, we analyze the results obtained after the use of these standards in the implementation of Web Service are satisfactory. To achieve the proposed was conducted an analysis of the architecture of the Web Service, by means of reverse engineering and code analysis. After this step, design patterns and refactoring have been defined and used in the new architecture for the implementation of the new Web Service, in order to provide and ensure the factors of quality: maintainability, reliability, efficiency and portability. Finally, performance testing, load/stress and functional were performed with the help of Open Source tools, JMeter and SoapUI Web Services, two for later results are analyzed. The results, after testing and benchmarking between the two Web Services, showed and improvement in the quality of services provided by the Web Service restructured, in addition to providing maintenance cost reduction. Therefore, this study found that refactorings and design patterns can be used in implementing the Web Service.

Made available in DSpace on 2016-08-17T14:53:23Z (GMT). No. of bitstreams: 1 Dissertacao Wagner Elvio.pdf: 4463476 bytes, checksum: 4fda2686652d403cd2641f98f3b51575 (MD5) Previous issue date: 2012-10-10 / The antivirus system and firewall are protection systems designed to prevent malicious work in the network, thus constituting a barrier to invaders (e.g. vírus, worms e hackers). However, there is no guarantee a full protection to network and computers, invasions can occur by exploiting vulnerabilities, known, and allow running programs remotely, changing privileges within the system and the dissemination of important information. In this case, Intrusion Detection System IDS (Intrusion Detection System) allows the detection of intrusions and subsequent notification to the network administrator or, in conjunction with the firewall blocks the port used in the invasion or the IP address of the attacker. An important factor for the intrusion detection is the quality of subscriber base. However IDS systems are isolated systems and the interoperability among different vendors IDS is complex and difficult to implement. Existing IDS systems in the literature, including the IDS NIDIA (Instrusion-Detection System Network Intrusion Detection System based on Intelligent Agents) are isolated systems, are not easily reused. Generally, they communicate using different protocols and are designed with different programming paradigms. In this work it is proposed an architecture based on the philosophy SOA (Service Oriented Architecture) to support interoperability between IDS systems. The IDS-NIDIA will be adapted and extended according to the SOA philosophy, containing layers of web services in order to provide a static service composition between the layers of the application and reuse of information with other IDS s. / Os sistemas antivírus e firewall são sistemas de proteção que visam impedir a execução de ações maléficas na rede, constituindo, portanto, uma barreira aos invasores (e.g.vírus, worms e hackers). Entretanto, não há como garantir uma proteção total da rede e dos computadores, podendo ocorrer invasões através da exploração de vulnerabilidades, já conhecidas, que permitem a execução de programas remotamente, a alteração de privilégios dentro do sistema e a divulgação de informações importantes. Neste caso, o Sistema de Detecção de Intrusão-IDS(Intrusion Detection System) permite a detecção de intrusões e a consequente notificação ao administrador da rede ou, em conjunto com o firewall, bloqueia a porta utilizada na invasão ou o endereço IP do atacante. Um fator importante para a detecção de intrusões é a qualidade da base de assinaturas. Entretanto os sistemas IDS são sistemas isolados e a interoperabilidade entre IDS de fornecedores diferentes é complexa e de difícil implementação. Os sistemas IDS existentes na literatura, incluindo o IDS-NIDIA (Instrusion Detection System- Network Intrusion Detection System based on Intelligent Agents), são sistemas isolados, não são facilmente reutilizados. Geralmente, estes se comunicam utilizando diferentes protocolos e são criados com paradigmas de programação diferentes. É proposta uma arquitetura baseado na filosofia SOA (Service Oriented Architecture ) para suportar a interoperabilidade entre sistemas IDS. O sistema IDS-NIDIA será adaptado e estendido de acordo com esta filosofia SOA, contendo camadas de serviços web com o propósito de oferecer uma composição de serviço estática entre as camadas de aplicação e o reuso de informações com outros IDS s.

This Master’s Thesis examines and documents challenges related to the flexible interchange of web services within a cross-cloud Service Oriented Computing scenario (SOC).Starting with a theoretical approach, hypotheses are defined and processed to create testing scenarios for a practical examination. Both examinations are used to identify possible challenges. Next, encountered challenges are described, discussed and classified. Lastly, solution approaches to identified challenges are presented. The solution approaches concern related topics, such as service standardization, semantic methods, heuristics, and security/trust mechanisms. Several approaches to different challenges are reviewed in this particular context, to present an overview for future research on the subject.It is remarkable that there will be more service standardization in the future, but to achieve full automation it will be, on the long run, necessary to evolve and adopt more sophisticated solution approaches such as semantic methods or heuristics.This work is embedded into the framework of a research co-operation between the Linnaeus University Växjö and the University of Applied Sciences Karlsruhe. Results however are also applicable to other research scenarios.

Les télécommunications par satellite prennent aujourd’hui de en plus d’importance, et le nombre d’abonnés à travers le monde ne cesse de croître. Partout où la fibre optique ne peut être déployée, elles sont un moyen fiable de fournir des débits très élevés aux utilisateurs, dont les pratiques nécessitent des bandes passantes toujours plus importantes (vidéo HD, visioconférences, téléchargement, cloud computing, jeux en ligne...). Elles garantissent également de très vastes zones de couverture. Pour les concepteurs de charges utiles de satellite, suivre les besoins du marché revient à augmenter constamment le nombre d’équipements embarqués, ce qui affecte le volume et la masse des systèmes et donc le coût de mise en orbite. Une des solutions envisagées afin de contrer ce phénomène consiste à employer des technologies optiques. Il a été démontré par Thales Alenia Space que pour un système de distribution de signaux de référence de 1 vers 64 équipements, la réduction du poids pourrait être de 70 %. Dans ce contexte nous avons développé 7 convertisseurs de fréquence RF réalisés à partir de composants photoniques semi-conducteurs. Ces convertisseurs font partie des composants clés des charges utiles car ils permettent d’isoler les transmissions montantes (vol vers satellite) et descendantes (satellite vers sol) afin d’éviter les interférences. Les performances des 7 architectures proposées, réalisées à partir de modulateurs électro-absorbants (EAM) et d’amplificateurs optiques à semi-conducteurs (SOA) ont été évaluées au travers de différentes simulations et en calculant le gain de conversion, le facteur de bruit, les isolations RF/FI et OL/FI, les rapports C/I3 et les coordonnées du point d’interception d’ordre 3. Nous avons obtenu des performances intéressantes, premières données pour de futures études et montré que ces convertisseurs seraient compatibles avec de nombreux plans de fréquence en bandes Ku/Ku, Ku+/Ku, et Ka/Ka. Des manipulations ont également permis de valider les modèles théoriques employés dans les simulations. / Nowadays, Satellite telecommunications are becoming very popular and the number of subscribers worldwide is always growing. Wherever the optical fiber cannot be deployed, they are a reliable way to provide very high data rates to the users, whose activities are becoming more and more bandwidth-hungry (HD video, video conferencing, downloading, cloud computing, online games ...). They also guarantee very large coverage areas. In order to follow the market needs satellite payload designers have to increase the number of on-board equipment, which affects the volume and mass of the systems and therefore the launching cost. One of the solutions to solve the problem consists in using optical technologies. It has been demonstrated by Thales Alenia Space that In the case of a reference signal distribution system for 64 devices, a weight reduction of about 70% could be obtained. In this context we have developed 7 RF frequencydown-converters based on photonic semiconductor components. The down-converters are key components of satellite payloads, as their aim is to isolate uplink transmissions (ground to satellite) and downlink (satellite to ground) to avoid interference. Performance of the 7 architectures, incorporating electro-absorption modulators (EAM) and semiconductor optical amplifiers (SOA) were evaluated through various simulations and by calculating the conversion gain, noise figure, RF/IF and LO/IF isolations, the C/I3 ratio and the coordinates of the third order intercept point. We obtained interesting results, first data for futur works,and showed that these converters are compatible with many frequency plans in Ku/Ku, ku+/Ku, and Ka/Ka bands. Manipulations were also led and validated the theoretical models used in simulations.

Depuis plusieurs années, la mondialisation du marché, l'augmentation des exigences des clients, et la recherche permanente d'une baisse des coûts induisent un accroissement fort de la complexité du monde industriel. Ainsi, la collaboration inter-organisationnelle devient essentielle pour maintenir et renforcer la compétitivité des entreprises. Dans cette optique, le système d'information peut, selon sa flexibilité et sa robustesse, freiner ou faciliter cette collaboration. Cette problématique est le point de départ du projet MISE (Mediation Information System Engineering) qui propose une solution pour la conception et la réalisation d'un système d'information collaboratif. Cette solution se base sur une démarche d'ingénierie dirigée par les modèles, couplée à une approche Business Process Management (BPM) et reposant sur les Architectures Orientées Services (SOA). Cette démarche se déroule en deux étapes : (i) la génération d'une cartographie de processus répondant à une situation collaborative (niveau métier), et (ii) sa transformation en un système exécutable (niveau technique). Les travaux présentés dans ce manuscrit s'inscrivent dans cette démarche. Ils s'intéressent en particulier au passage du niveau métier vers le niveau technique en se focalisant sur les aspects non-fonctionnels. Nous présentons une approche permettant (i) d'annoter les activités métier à l'aide d'exigences non-fonctionnelles lors de la modélisation des processus collaboratifs, (ii) de rationaliser la gestion des services et leurs propriétés non-fonctionnelles au moyen de la Gouvernance SOA, et enfin (iii) de faire une réconciliation non-fonctionnelle entre les activités et les services. Nous avons validé les concepts de notre approche au travers de deux prototypes : Petals BPM-NFR pour la modélisation et l'annotation non-fonctionnelle des processus métier, et EasierGov-NFR pour la gouvernance des services et leurs propriétés non-fonctionnelles ainsi que la réconciliation non-fonctionnelle. Un cas d'étude illustre notre approche pour prouver son applicabilité. Ces travaux s'inscrivent au sein du projet européen FP7 CHOReOS. / Over the last years, the globalization, the increase of customers requirements, and the constant search for lower costs, have induced a steep complexity of organization's management. Therefore, inter-organizational collaboration becomes essential to maintain and enhance the competitiveness of enterprises. In this context, the information system may, depending on its flexibility and its robustness, hamper or facilitate this collaboration. One approach to resolve this problem has been taken by the MISE (Mediation Information System Engineering) project. It aims to provide an effective implementation of a collaborative information system, based on Model-Driven Engineering, coupled with a Business Process Management approach (BPM) and supported by Service-Oriented Architecture (SOA). This solution consists in two steps: (i) the generation of a business processes map from the description of a collaborative situation (business level), and (ii) the transformation of these process models into an executable system (technical level). The works detailed in this PhD take roots in this solution and improve it by adding non-functional aspects management during the transition from the business level to the technical level. We present an approach that: first (i) annotates the business activities with Non-Functional Requirements (NFR) in the processes modelling stage, second (ii) rationalizes the management of services and their non-functional properties through SOA Governance, and third (iii) makes a non-functional reconciliation between activities and services. We validate our approach through two prototypes: Petals BPM-NFR for modelling and non-functional annotation of business process, and EasierGov-NFR for the governance of services and their non- functional properties, and the non-functional reconciliation. A case study illustrates our approach to demonstrate its applicability. This work is supported by the FP7 European project CHOReOS.

Le but de cette thèse est la synthèse optique d'ondes millimétriques et submillimétriques avec un très bas bruit de phase. La première partie concerne la réalisation d'un laser biaxe bifréquence dont chacune des deux fréquences est accordable indépendamment et continûment sur 1 THz. Ce laser est caractérisé en bruit d'amplitude et de phase. Nous avons mis en évidence un facteur de couplage entre les fluctuations de puissance de la diode de pompe et le bruit de phase du laser. La deuxième partie concerne le développement d'un système amplificateur qui se compose d'un amplificateur EDFA et d'un SOA par polarisation. Ce système amplificateur permet d'obtenir une puissance de l'ordre de 17 dBm, tout en réduisant le bruit relatif d'intensité (RIN) d'une vingtaine de dB sur 1 GHz. Cet amplificateur est également un actionneur pour la stabilisation de puissance permettant un RIN de l'ordre de -150 dB/Hz de 3 Hz à 5 kHz. La dernière partie concerne la mise en place du banc cavité et de l'asservissement des fréquences du laser sur une cavité ultra-stable. Nous obtenons un bruit de phase, à 10 kHz pour une porteuse à 10 GHz, meilleur que le plancher de bruit d'un analyseur de bruit de phase hautes performances de l'ordre de -115 dBc/ Hz. Le bruit de phase du système est indépendant de la fréquence de battement. / The aim of this thesis is the optical synthesis of millimeter and submillimeter waves with a very low phase noise. The first part concerns the development of a dual-axis dual frequency laser, whose the two frequencies are tuneable independently and continuously on 1 THz. This laser is characterized in amplitude noise and phase noise. We have identified a coupling factor between the diode pump and the power fluctuations of the laser phase noise. In the second part, we report the development of an amplifier system which consists of an EDFA and a SOA per polarisation axis. This amplifier system delivers 17 dBm of power and reduces the relative intensity noise (RIN) by 20 dB on a 1 GHz bandwidth. This amplifier is also an actuator for the power stabilization to a RIN of the order of -150 dB/Hz from 3 Hz to 5 kHz. The last part concerns the setup of the cavity bench and the stabilization of the laser frequency on a ultrastable cavity. We obtain a phase noise at 10 kHz of frequency offset on a 10 GHz carrier better than the noise floor of a phase noise analyser with high performance of the order of -115 dBc/Hz. The system phase noise is independent of the beatnote frequency.

There are considered modern messaging architectonical concepts SOA and EDA in this diploma thesis. There are presented the elementary principals of functioning of these paradigms and principals are given into the wider context with the business processes and IT Governance. The aim of this thesis is to compare two preselected software solutions of the operational monitoring. There is always one solution per architectonical style and predefined comparative criteria. This thesis is divided into five consequential parts. The first part is focused on the putting the modern architectures into the historical context. The historical context is the way out for the modern architectonical styles. The part afterwards is closely focused on the concepts of SOA and EDA, and also on the comparison of the mentioned architectonical styles. There are put the concepts into the connection with business processes and maturity models In the next chapters. That all together has a influence on the successful implementation and governance. The chapters continuously flow into the last theoretical part of the thesis, IT Governance. There are described all the elements connected with the successful IT systems operating based on the paradigm SOA or EDA. The context in the practical part is link to the all these previous chapters. There are selected and described two software solutions in the practical part of this thesis. These solutions are then compared by the predefined criteria. The conclusion summarizes all the knowledge acquired during the paradigm comparison and there are also summarized knowledge acquired during the comparison of selected monitoring products.

Teleworking is the key to a more flexible design of working time and places of work. To reach the flexibility for working anywhere and anytime a virtual working environment is needed which is reached from any place having a browser and internet access, at home, on the road or in the office. The goal of our activities is to develop a set of technologies fitting in the web architecture in order to bring teleworking applications to their full potential. Our new concept is to combine different web services in a new integrated man-machine environment that enables access to all necessary services. So it will be easier for the teleworker to handle the different applications and techniques. The teleworking portal provides them access to various resources: office applications, multimedia objects and documents, communication tools such as email and conferences, collaboration and group work systems or educational software and training tools. In order to promote interoperability and extensibility among these applications, as well as to allow them to be combined to perform more complex operations, a standard reference architecture for such services is needed. Consequently our approach is based on the Service Oriented Architecture (SOA) and the web service technology. / Telearbeit ist der Schlüssel zu einer flexibleren Arbeitsplatz- und Arbeitszeitgestaltung und eröffnet vielfältige Möglichkeiten und ökonomische Potentiale. Nach zahlreichen Kontroversen über die Vor- und Nachteile haben vor allem die Entwicklung kostengünstiger Informations- und Kommunikationstechniken, aber auch der Handlungsdruck einer zunehmend globalisierten Wirtschaft das Thema Telearbeit in den letzten Jahren neu belebt. Im Rahmen vorangegangener Projekte wurden vielfältige Forschungen zum Thema Telearbeit durchgeführt. Bei der bisherigen Umsetzung von Telearbeit in der Praxis ergaben sich vor allem Probleme im Umgang mit den verschiedenen Arbeitsumgebungen im Büro und am Telearbeitsplatz und dem Abgleich der Arbeitsstände und -ergebnisse. Ziel der Arbeit ist die prototypische Entwicklung einer webbasierten, flexiblen und modular aufgebauten Arbeitsumgebung, die eine effektive Anpassung an die Arbeitsweise des jeweiligen Telearbeiters und Unternehmens ermöglicht. Dabei wurde neben der Definition und Anforderungsanalyse von Telearbeit ein Architekturmodell für eine integrierte Arbeitsumgebung entworfen. Durch die umgesetzte Bausteinarchitektur wird eine flexible Anpassung der Umgebung an die Bedürfnisse der Telearbeiter und der Unternehmen erreicht. Weiterhin werden im Rahmen der Arbeit existierende Ansätze zur Unterstützung von Telearbeit analysiert und klassifiziert, um die eigene Arbeit abzugrenzen. Zur praktischen Umsetzung des Konzeptes wurden vorhandene internetbasierte Protokolle auf ihre Nutzbarkeit für Telearbeitsumgebungen untersucht. Als sehr gut geeignete und innovative Technologien erwiesen sich die Web Services. Deshalb werden die Basisprotokolle und grundlegenden Technologien für Web-Service-Lösungen im Rahmen der Arbeit spezifiziert und auf ihre Nutzbarkeit im Telearbeitskontext untersucht. Abschließend erfolgte eine prototypische Umsetzung der vorgeschlagenen Lösung und eine Validierung in verschiedenen Anwendungsszenarien, um die Praxistauglichkeit des Konzeptes nachweisen zu können.