Mobile devices have evolved over the years from resource constrained devices that supported only the most basic tasks to powerful handheld computing devices. However, the most significant step in the evolution of mobile devices was the introduction of wireless connectivity which enabled them to host applications that require internet connectivity such as email, web browsers and maybe most importantly smart/rich clients. Being able to host smart clients allows the users of mobile devices to seamlessly access the Information Technology (IT) resources of their organizations. <p>One increasingly popular way of enabling access to IT resources is by using Web Services (WS). This trend has been aided by the rapid availability of WS packages/tools, most notably the efforts of the Apache group and Integrated Development Environment (IDE) vendors. But the widespread use of WS raises questions for users of mobile devices such as laptops or PDAs; how and if they can participate in WS. Unlike their wired counterparts (desktop computers and servers) they rely on a wireless network that is characterized by low bandwidth and unreliable connectivity.<p>The aim of this thesis is to enable mobile devices to host Web Services consumers. It introduces a Model-Driven Dual Caching (MDDC) approach to overcome problems arising from temporarily loss of connectivity and fluctuations in bandwidth.

Service-oriented Architecture is now an important issue when it comes to program development. However, there is not yet an efficient and effective way for developer to obtain appropriate component. Current researches mostly focus on either textual meaning or ontology relation of the services. In this research we propose a hybrid approach that integrates both types of information. It starts by defining important attributes and their weights for web service discovery using Multiple Criteria Decision Making. Then a method of similarity calculation based on both textual and ontological information is applied. In the experiment, we collect 103 real-world Web services, and the experimental results show that our approach generally performs better than the existing ones.

¡@¡@With the rapid advance of information technology, Service Oriented Architecture (SOA) is becoming a mature technology. Many software firms have implemented it to enhance the flexibility and efficiency of system development. Several systems analysis and design methods have been proposed to develop the SOA systems. Among them, however, the detailed guideline and procedure for identifying the services and components in PIM (Platform Independent Model) stage are lacking. ¡@¡@To alleviate the forgoing problem, this study proposed a PIM modeling methodology for developing an SOA system. The methodology which includes the business process, service, and component layers, uses the unified modeling language to describe the detailed modeling processes and rules for each layer. The research methodology is articulated using the design science research methodology. A usability evaluation is performed to demonstrate its applicability with a testing case. With this proposed method, the system developer can easily model the PIM of SOA systems, and thereby enhance the efficiency and effectiveness of system development.

Service-Oriented Architecture (SOA) is intended for the integration of heterogeneous applications. Complex business processes are composed by a group of specific Web services using WS-BPEL (Business Process Execution Language), and these Web services may be designed by the enterprise itself or third-party services providers. Today there are many WS-BPEL engines that support the deployment and execution of WS-BPEL files. However, the WS-BPEL activities have to be pre-defined, and if at runtime a Web service call fails, the entire business process is pronounced to be failed, thereby jeopardizing the reliability of SOA. Although the WS- BPEL supports compensation mechanism, it is complex and not flexible. In this work, we propose a process design model to support dynamic Web services selection that eases the designer¡¦s job. This model has been implemented, and the prototype is evaluated to demonstrate that it indeed improves the overall business process reliability.

In this work an electronic warfare system is restructured to service oriented architecture. Service Oriented Architecture (SOA) is a paradigm that realizes rapid and low cost system development. The most important characteristics of SOA are standard based interoperability, which allows services developed on different platforms to run together, and dynamic composition via discovery, which provides dynamic composition of application at runtime using the existing services. The old warfare system that was developed by ASELSAN Inc. contained embedded software and was designed using traditional object oriented techniques. In this thesis, we have extracted services out of the system and restructured the warfare system based on service oriented principles. In this thesis, we have focused on the dramatic effect of reusability when SOA is introduced to the electronic warfare system. To understand the effect of service orientation, the new system is evaluated in terms of line of code, memory consumption and extra CORBA interface communication overhead.

<p>Detta examensarbete behandlar Service Oriented Architecture (SOA) och dess implementeringar Jini och Web services. SOA beskriver hur applikationsintegration mellan olika plattformar skall ske och innebär att applikationer designas som tjänster för att enkelt integreras med andra applikationer. Dynamisk lokalisering av tjänster via en registertjänst används för att applikationer skall finna andra applikationer. Vi designar och implementerar en mekanism i Web services som gör det möjligt att byta en tjänst under exekvering. Ett sådant byte kan vara intressant av två skäl, tjänster kan registreras utan att vara tillgängliga, eller att det uppstår ett fel under exekvering som gör att tjänsten blir otillgänglig.</p> / <p>This degree project is about Service Oriented Architecture (SOA) and its implementations Jini and Web services. SOA is a description of how application integration between different platforms can be carried out by designing applications as services, which implies an easier integration with other applications. Dynamic location of services is carried out by consultation with a register service so that applications can find other applications. We design and implement a mechanism in Web services that makes it possible to change service during execution. A change of service can be interesting for two reasons, the service might be registered but not available or there might be some sort of fault during execution that makes the service unavailable.</p>

The oxidation of a range of Volatile Organic Compounds (VOCs) has been studied, from small alkenes (e.g. ethene C2) to larger sesquiterpene species (e.g. β-caryophyllene C15). The gas-phase reactions of these VOCs, largely emitted from biogenic sources, can form oxidation products with high mass and low volatility to contribute to aerosol formation, namely for monoterpene and sesquiterpene species. These organic aerosols formed from chemical reactions in the atmosphere are secondary organic aerosols (SOA). Aerosols can have a profound impact on both climate and health issues at regional and global scales. Processes that govern these gas-to-particle phase reactions are still not fully understood. This thesis presents detailed gas-phase composition data from the various VOCs examined, and tries to highlight important gas-phase species involved in the processes for SOA formation in the atmosphere. The gas-phase composition was measured in real-time utilising the University of Leicester Chemical Ionisation Reaction-Time of Flight-Mass Spectrometer (CIR-ToF-MS). Experiments were conducted under two different environments, “dark” ozonolysis experiments were studied at the EUropean PHOtoREactor (EUPHORE) atmospheric simulation chamber (Valencia, Spain) whilst “light” photooxidation experiments were conducted at the Manchester Aerosol Chamber (MAC) facility (Manchester, UK). The ozonolysis experiments focused around small alkene species (ethene, isobutene, and trans-2-butene), isoprene and monoterpenes (myrcene, α-pinene and limonene) in the absence of NOx and investigated with and without radical scavengers in order to suppress side reactions. Under dry conditions the primary oxidation products for smaller alkene ozonolysis averaged yields for formaldehyde (HCHO) as 1.56 ± 0.09, 1.21 ± 0.03 and 0.15 ± 0.01 for ethene, isobutene and trans-2-butene respectively. Other major gas phase product yields were recorded. Under wet conditions HCHO yields increased dramatically for ethene ozonolysis, to 3.09 ± 0.12 and 1.94 ± 0.31 for isobutene, but no substantial difference was observed for trans-2-butene with an average yield of 0.19 ± 0.04. Observations on gas-phase composition varied little based on the latter and model comparisons were made using the Master Chemical Mechanism (MCMv3.1). Photolysis experiments were conducted for isoprene, monoterpenes (limonene, α-pinene and myrcene) and a sesquiterpene, β-caryophyllene. This led to a direct comparison of composition and yields were obtained for certain oxygenated VOCs (oVOCs). The major gas phase products of isoprene ozonolysis, methacrolein (MACR) recorded average yields of 0.24 ± 0.16 and methyl-vinyl ketone (MVK) at 0.15 ± 0.01 for dry conditions, whilst yields of 0.36 ± 0.04 and 0.17 ± 0.02 were observed for wet conditions respectively. Similar yields were observed for photolysis conditions. The highest average yields in the gas phase for all monoterpene species were the primary aldehyde species formed (e.g. pinonaldehyde for α-pinene), ranging averaged yields from 0.115 to 0.583 for ozonolysis reactions and 0.119 to 0.270 under photolysis conditions. Where applicable, SOA yields were determined using a Differential Mobility Particle Sizer (DMPS) and composition of the particle phase made off-line using Liquid chromatography-ion trap mass spectrometry (LC-MSn). A unique method of organic seed formation was also constructed for photolysis experiments for isoprene and limonene using β-caryophyllene as a precursor for the organic seed. Finally mesocosm experiments of direct emissions from tree species Ficus cyathistipula, Ficus benjamina and Caryota millis (to simulate tropical Asian conditions) and Betula Pendula (to encompass European environments). The tropical monoterpene producing species formed SOA, whereas the European isoprene dominant species did not. Implications of this are further discussed along with the difference observed in gas-phase composition and yields of oxidation products produced from all experiments. An Am241 source and a newly developed hollow cathode source was utilised in both campaigns so instrumental sensitivity, in particular for lower mass species is also discussed. Evidence from the experiments shows that SOA formation is only observed from monoterpene and sesquiterpene compounds. Here isoprene did not form any substantial SOA and we argue it can inhibit SOA formation. Important gas phase species for SOA contribution were those of C10 or higher, in particular the primary aldehyde oxidation products of monoterpenes that were observed in both gas and particulate phase.

Lithuanian healthcare is highly fragmented enterprise, with complex paper-based processes, that are inefficient, error prone, and often redundant. These shortcomings create formidable barriers to collaborative medical research. This paper is a research of Service Oriented Architecture solutions for solving interoperability problems when exchanging patient data between heterogeneous healthcare systems. The Lithuanian healthcare information needs analysis was made to create the Service Oriented Architecture based model for exchanging patient data. The model prototype was developed to demonstrate the reusability and flexibility of service oriented solutions.

El objetivo general del presente trabajo de título es un caso real de integración entre el ERP de SAP y los legacy del área de logística de una compañía distribuidora de combustible en Chile utilizando los principios que el patrón de diseño SOA ofrece y con la ayuda de herramientas comerciales que implementan y facilitan la integración entre sistemas computacionales heterogéneos. El área de logística de la compañía cuenta con una variedad de aplicaciones legacy Web del tipo J2EE que utilizan de manera independiente y que les permiten realizar la programación de los pedidos de combustible que sus clientes efectúan, asignación de los pedidos a los distintos camiones tanques, modificaciones y cancelaciones que se deban realizar a los pedidos, medición de eficiencia de los transportes y viajes efectuados, etc. La integración se basó en los conceptos que el patrón SOA indica como mejor práctica con la ayuda de plataformas tecnológicas de la línea WebSphere de IBM tales como MessageBroker, MQ, Adaptadores del MessageBroker para comunicarse con el ERP y con el sistema operativo sobre el cual funciona que es Os/400 sobre iSeries, etc. Las principales decisiones tomadas durante el proyecto dicen relación con casos en los cuales se decidió hacer pasar el flujo de datos por la plataforma SOA instalada y cuando no hacerlo porque entregaba mejores prestaciones, tiempos de respuesta y seguridad. Durante todo el proyecto estos fueron temas de discusión y análisis dado que cada caso en la práctica trae un análisis individual que debe ser enfrentado bajo la mirada de conveniencia para la empresa, entendiéndose que estas conveniencias podrían ser tiempos de respuesta, puntos de falla, servicio e imagen al cliente. En el detalle del trabajo se tomaron decisiones relacionadas con el tipo y formato de mensajes que transportan los datos entre las aplicaciones que participan del proceso de despacho de combustibles. Detalles como saber cuántos campos de datos son necesarios por mensaje, que separadores debían acordarse y ser utilizados, como serían tratados los encolamientos de los mensajes según si prioridad, los mensajes devuelta que deben ser enviados para cerrar los ciclos de cada proceso que se gatillen, etc. Cada una de estas decisiones en los distintos mensajes de datos que se gatillan en cualquier sentido dentro del proceso de despacho de combustible muestra los esfuerzos principales sobre los cuales se concentró el presente trabajo de título. El resultado final fue un conjunto de aplicaciones del tipo Web y legacy que se comunican con el ERP de SAP para lograr de manera exitosa el despacho de combustible desde las plantas de la compañía; todo esto con la ayuda de una infraestructura conformada por filesystem y carpetas compartidas, plataformas de integración de IBM, flujo de mensajes que transmiten los datos, etc. Se concluye que los proyectos de integración si bien logran el objetivo principal sobre el cual se basan, carecen aún de la madurez necesaria en su diseño o bien en los productos comerciales que existen hoy en el mercado, dado que muchas decisiones se debieron tomar descartando lo que eran las mejores prácticas de SOA en beneficio de obtener una solución acorde a las necesidades de la compañía. La mirada de performance y eficiencia de los procesos es muy difícil dimensionarla y considerarla durante este tipo de proyectos y deben ser enfrentados, por lo general, posteriormente a su puesta en marcha, cuando los datos cuantitativos del funcionamiento entregan muchos más antecedentes que ayuden a encontrar las oportunidades de mejoras y los cuellos de botella que deben ser solucionados.

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2017. / Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2018-03-16T16:24:01Z No. of bitstreams: 1 2017_ValériaAparecidaGuimarães.pdf: 1828368 bytes, checksum: 4047d548f541303b269a48ee3ab36079 (MD5) / Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2018-04-17T18:21:33Z (GMT) No. of bitstreams: 1 2017_ValériaAparecidaGuimarães.pdf: 1828368 bytes, checksum: 4047d548f541303b269a48ee3ab36079 (MD5) / Made available in DSpace on 2018-04-17T18:21:33Z (GMT). No. of bitstreams: 1 2017_ValériaAparecidaGuimarães.pdf: 1828368 bytes, checksum: 4047d548f541303b269a48ee3ab36079 (MD5) Previous issue date: 2018-04-17 / Uma das técnicas de medição mais utilizadas e documentadas para a obtenção do tamanho de um software é a Análise de Pontos de Função (APF). No entanto, discussões acerca da sua aplicabilidade para projetos SOA (Arquitetura Orientada a Serviço) têm sido constantes, o que justificou a escolha desse tema de investigação. Este documento apresenta os resultados de uma pesquisa cujo objetivo foi a construção de uma proposta para a medição, por meio da utilização de Pontos de Função (PF), do tamanho funcional de softwares que utilizam as abordagens de desenvolvimento de software com SOA e BPM (Business Process Management). A proposta foi desenvolvida a partir de revisão da literatura e de análises de dados empíricos coletados durante a execução de um projeto real. Ao final do trabalho, foi possível realizar análises comparativas entre projeções usando APF, o método proposto e dados empíricos. O resultado mostrou que a APF não é adequada para a medição do tamanho funcional de projetos SOA/BPM, ao contrário do método proposto. / One of the most widely used and documented measurement techniques for obtaining software size is Function Point Analysis (FPA). However, there have been frequently discussions about its applicability to SOA (Service Oriented Architecture) projects, which justifies a choice of the research topic. This document presents the results of a research whose objective was the construction of a proposal to measure SOA and BPM (Business Process Management) softwares through the use of Function Points (PF). A proposal has been developed based on literature review and empirical data analyzes, with was collected from an execution of a real project. The research compare empirical data (from a real-world project) to projections based on FPA, as well on the proposed method. Results demonstrate that the proposed method is suitable to SOA/BPM projects, differently of FPA.