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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Integrating peer-to-peer into web services

Han, Weidong 24 August 2006
The Service Oriented Architecture (SOA) is emerging as a new standard for building large loosely coupled systems. Web Services, the dominant implementation platform for SOA, use a server-centric approach to manage all components. This limits the deployment of Web Services to static domains, since a service invocation will fail if the server component changes its availability or location. <p>This research focuses on the possibilities of integrating P2P technology into the Web Services environment as a means of increasing its robustness. A P2P-Web Services architecture is presented that enables service discovery and service invocations in dynamic environments. The corresponding experiments on the reference system and the simulation system present the characteristics and improvements of the hybrid system.
112

Securing XML Web Services : using WS-security

Antonsson, Martin January 2003 (has links)
No description available.
113

Integrating peer-to-peer into web services

Han, Weidong 24 August 2006 (has links)
The Service Oriented Architecture (SOA) is emerging as a new standard for building large loosely coupled systems. Web Services, the dominant implementation platform for SOA, use a server-centric approach to manage all components. This limits the deployment of Web Services to static domains, since a service invocation will fail if the server component changes its availability or location. <p>This research focuses on the possibilities of integrating P2P technology into the Web Services environment as a means of increasing its robustness. A P2P-Web Services architecture is presented that enables service discovery and service invocations in dynamic environments. The corresponding experiments on the reference system and the simulation system present the characteristics and improvements of the hybrid system.
114

Using cooperation to improve the experience of web services consumers

Luo, Yuting 11 September 2009 (has links)
Web Services (WS) are one of the most promising approaches for building loosely coupled systems. However, due to the heterogeneous and dynamic nature of the WS environment, ensuring good QoS is still non-trivial. While WS tend to scale better than tightly coupled systems, they introduce a larger communication overhead and are more susceptible to server/resource latency. Traditionally this problem has been addressed by relying on negotiated Service Level Agreement to ensure the required QoS, or the development of elaborate compensation handlers to minimize the impact of undesirable latency.<p> This research focuses on the use of cooperation between consumers and providers as an effective means of optimizing resource utilization and consumer experiences. It introduces a novel cooperative approach to implement the cooperation between consumers and providers.
115

Web Services – för enklare användning av karttjänster

Lund, Jonas January 2004 (has links)
Detta arbete har bedrivits i syfte att kartlägga funktionalitet, teknik och användningsområde gällande Web Services. Innehållet utgör således en teoretisk utvärdering av Web Services, samt tester av grundläggande programmeringslösningar. De frågor arbetet ämnar besvara är hur en Web Services på lämpligt sätt kan baseras på en befintlig tjänst, samt på vilket sätt denna Web Services kan göra aktuell tjänst lättare att använda. Dessutom belyses eventuella problem som kan uppstå i samband med denna Web Services-anpassning. I syfte att presentera ett lösningsförslag på ovan nämnda frågor granskades, via en litteraturstudie, ett antal informatikrelaterade begrepp liksom faktorer förknippade med kommersiell verksamhet på Internet. Erhållen teoretisk fakta analyserades via empiriskt arbete. Resultaten av analysen indikerar att en Web Services baserad på karttjänsten MapService kan innebära vissa fördelar för det aktuella företaget såväl som för deras kunder. Att bredda tjänsteutbudet med en marknadsdominerande standard innebär vissa fördelar för ett företag, inte minst i form av ett potentiellt större kundunderlag. Kundens vinster utgörs främst av för ändamålet utformade toolkits. Dessa hjälpmedel och verktyg underlättar implementationen av aktuell tjänst. Den ansats som här valts, att designa Web Servicen som en parser (tolk/konverterare) vars huvudsakliga syfte är att förmedla kommunikation mellan användare och befintlig tjänst, har vissa fördelar. Främst det faktum att redan befintlig funktionalitet kan utnyttjas. All kommunikation mellan användare och server hanteras av Web Servicen, som enligt denna princip utgör ett nytt gränssnitt med vilket tjänsten MapService kan användas. Till följd av det omfattande teoretiska utredningsarbetet har detta arbete inte genererat några prototyper, annat än på ett teoretiskt plan. Det problem som återstår är att utreda exakt hur ovan nämnda parser skall vara utformad, för att sedan implementera all funktionalitet som en helhet.
116

Building blocks for composable web services

Buttler, David John 01 December 2003 (has links)
No description available.
117

A Study and Implementation of Match Problem

Shyu, Jin-Hong 14 August 2003 (has links)
Match problem is a very practical problem. For example, distribution system of united examination today is a kind of match problem. However, it is very inconvenient to hand over preference card now. Person must leave for designate place to hand over preference card. Besides, Internet is in widespread use now. A lot of work has accomplished and achieved conveniently by the use of Internet, such as Internet filing tax, electronic document and so on. After the work electronic-based, the work efficiency and personal convenience will be increased. Therefore, this study is constructing a system, which combines handing over preference card with Internet and considering that the security of Internet. This can simplify the procedure of handing over preference card.
118

Choreographing Web Services in Support of Reliable Composite Web Service Execution

Liao, Wen-Po 11 August 2009 (has links)
Nowadays, web services have been widely utilized on the Internet. The communication of organizations becomes much easier; thanks to the advances of computer and communication technologies and the inexpensive cost, and the integration of applications within and across business organizations is a trend. In general, there are two approaches in composing web services inside or outside an organization: orchestration and choreography. Previous work in the web service selection is usually based on orchestration model and focuses on the interest of a single party. However, in many application scenarios, business goals are achieved by pair-wise interactions among a set of WSs, and there is no single entity that is in charge of selecting web service for each task. Each web service can autonomously perform web service selection. By autonomy, we maintain that each WS is aware of only its partner web services. In such a choreographic environment, we study the kind of information that each web service should provide to its partner web services and how each web service should perform web service selection so as to maximize the chance of successfully accomplish a business goal. The proposed approach is evaluated by simulating 10,000 execution sequences of the target WS and assumed a fixed operation reliability for each delegation. The experimental results show that our proposed method is close to centralized method and better than other two selection methods, namely random and view-based-propagation-free.
119

Motivations- och problemfaktorer vid införandet av Web Services i svenska företag

Smigan, Jan January 2005 (has links)
<p>Från litteraturen påverkar införandet av Web Services hos 25 storföretag och 3 myndigheter i Sverige. Undersökningen utfördes genom en enkät där motivations- och problemfaktorerna indelades i tre kategorier: innovation, organisation och miljö/omgivning och dessa graderades sedan på en femgradig skala. Den viktigaste kategorin enligt respondenterna var organisation. Dessutom lämnades möjlighet till att lämna egna faktorer och kommentarer. Inom kategorin innovation graderade respondenterna som högsta motivationsfaktorn att Web Services fungerar bra ihop med kommande standarder och som näst viktigast faktorn fördelar med plattformsoberoende. En av de högst graderade problemfaktorerna var säkerhetsproblem. Under kategorin organisation blev den viktigaste faktorn mer flexibla affärslösningar medan den högsta problemfaktorn var otillräcklig kunskap. Under kategorin miljö/omgivning graderades motivationsfaktorn att partners och leverantörer använder sig av tekniken högst och som högsta problemfaktorn att det råder tröghet hos omgivningen. Resultatet av detta arbete visar att faktorerna framtagna ifrån litteraturen är relevanta för de studerade svenska företag och myndigheter och i varierande grad inverkar på införandet av Web Services hos dem.</p>
120

Latent semantic web service directory and composition framework a thesis /

Yick, (Winnie) Yuki B. Haungs, Michael L. January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2009. / Mode of access: Internet. Title from PDF title page; viewed on Jan. 6, 2010. Major professor: Dr. Michael Haungs. "Presented to the faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Computer Science." "Aug 2009." Includes bibliographical references (p. 76-78).

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