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McElhiney, Patrick R. "Scalable Web Service Development with Amazon Web Services". Thesis, University of New Hampshire, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10931435.
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The objective of this thesis was to explore the topic of scalable web development, and it answered the question, “How do you scale a website to handle more traffic at peak times without wasting resources?” This is important research to any web company that has issues with rising costs as demand for their website increases. It would be wise for every online business to be prepared for more web traffic, before it occurs, without spending the budget of a multi-million user web company in low traffic periods. The last thing you want is an error as your customer base starts to arrive, giving them a bad experience for their first impressions, which would result in lost revenue.
Scalable software development architectures, including microservices, big data, and Kubernetes were studied, in addition to similar web service companies including Facebook, Twitter, and Match.com. A scalable architecture was designed for a social media web service, MeAndYou, using the big data configuration with a shared Aurora database, which was configured using an auto-scaling group attached to a load balancer in Amazon Web Services (AWS). It was tested using a custom threaded Selenium-based Python script that applied simulated user load to the servers. As the load was applied, AWS added more Elastic Compute Cloud (EC2) instances running a virtual disk image of the web server. After the load was removed, the instances were terminated automatically by AWS to save costs.
Countless steps were taken to make the web service bigger and more scalable than it originally was, before testing, including adding more fields to user profiles, adding more search types, and separating the layers of code into different Hypertext Preprocessor (PHP) files in the front-end. A version control system was configured on the servers using GitHub and rsync. The systems architecture designed suggests the Match Engine should use a stream processing message queue, which would allow the system to factor searches one at a time as they are created, with horizontal scaling capabilities, rather than grabbing the entire database and storing it in memory. The backend Match Engine was also tested for accuracy using Structured Query Language (SQL) injection, which determined how the match algorithm should be improved in the future.
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Böök, Klas y Christian Strand. "Jini kontra Web services, med intention att göra Web services pålitligt". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-58.
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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.
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.
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Ivanovas, Anselm. "Der Markt für Web Services Eine Analyse kommerzieller Web Service Verzeichnisse /". St. Gallen, 2007. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/06609077001/$FILE/06609077001.pdf.
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Miles, Stephen B. (Stephen Bell) 1954. "Web services strategy". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17001.
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Thesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 2003.June 2003.
Includes bibliographical references (p. 116-123).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Everything is connected to everything. El Aleph (1945), by Jorge Luis Borges[1] This thesis addresses the need to simplify and streamline web service network infrastructure and to identify business models that best leverage Web services technology and industry dynamics to generate positive business results. Web services have evolved from the simple page-display protocol of their origin and now reach beyond the links that simply updated web data dynamically from corporate databases, to where systems can automatically transact. These Web services represent a series of network business technology standards and capabilities that irrevocably change the way in which businesses will do business. In fact, every business today is a networked business and has opportunities to grow using Web services. This study focuses on the implementation challenges in the financial services market, specifically the On Line Transaction Processing (OLTP) sector where legacy mainframes interface with multiple tiers of distribution through proprietary EDI links. The OLTP industry operates under stringent regulatory requirements for availability and audit-ability of not only who performed what transaction, but who had access to the information about the information. In this environment organizational demands on network infrastructure including hardware, software and personnel are changing radically, while concurrently Information Technology (IT) budgets are under pressure. The strategic choices for deploying web services in this environment may contain lessons for other industries where cost effective large scale processing, high availability, security, manageability and Intellectual Property Rights (IPR) are paramount concerns. In this paper we use a systems dynamics model to simulate the impact of market changes on the adoption of innovative technologies and their commoditization on the industry value chain, with the aim of identifying business models and network topologies which best support the growth of an Open Systems network business. From the results of the simulation we will derive strategic recommendations for networked business models and web services integration strategies to meet Line Of Business (LOB) objectives.
by Stephen B. Miles.
S.M.M.O.T.
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Tyagi, Sapna DevendraSingh 1978. "Web services @ MIT". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29421.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.Includes bibliographical references (leaf 66).
There are several useful web services developed at MIT by students, faculty and researchers. However, they are scattered all over MIT. Most people at MIT are unaware of the availability of these web services and hence they cannot leverage them. The thesis provides a solution to this problem called Web Services @ MIT that tracks all the web services scattered over MIT at a single location, with a brief description of the service they provide. Web Services @ MIT is intended to facilitate exploitation of both centrally and locally developed web services in a highly distributed enterprise such as MIT. While there is a compelling need for such a service, no such service is currently available at MIT. Web Services @ MIT is a portal built on top of IBuySpy Portal Solution Kit that allows one to build intranet and Internet application using ASP.NET along with Microsoft .NET Framework.
by Sapna DevendraSingh Tyagi.
M.Eng.
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Shu, Shujing. "Towards Integration of SOAP-Based Web Services and OGC Web Services". ScholarWorks@UNO, 2004. http://scholarworks.uno.edu/td/469.
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Over the last several years, the Web Services model of Geographic Information Systems has been rapidly evolved and materialized. In this thesis project, I have reviewed the current status of integrating the general Web Services technology (SOAP, WSDL, and UDDI) and OpenGIS Consortium (OGC) Web services standards in developing distributed GIS computing. The overlap of the web service model and the technology stack between the SOAP-based Web Services and OGC Web Services indicates the feasibility of integration. OGC has named all core general Web Services Technologies (SOAP, WSDL, UDDI) in its envisioned OWS architecture. OGC has also started putting efforts for the integration by conducting experiments, which include a SOAP experiment and an UDDI experiment. However, these experiments only identified some very specific issues based on small number of testing interfaces and scenarios. There are leading GIS software vendors who have adopted both areas in their implementation. The ESRI ArcWeb Services is a good example, which implements OGC Web Services Interfaces using SOAP, WSDL, and UDDI. In my implementation experiment, Java Web Services Developer Pack is used to build a client of Microsoft TerraService. SOAP messages are constructed to retrieve DOQ images from the TerraService as the background to display ArcSDE feature data. Query functionalities on the feature data are implemented.
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Medjahed, Brahim. "Semantic Web Enabled Composition of Web Services". Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/27364.
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In this dissertation, we present a novel approach for the automatic composition of Web services on the envisioned Semantic Web. Automatic service composition requires dealing with three major research thrusts: semantic description of Web services, composability of participant services, and generation of composite service descriptions.
This dissertation deals with the aforementioned research issues. We first propose an ontology-based framework for organizing and describing semantic Web services. We introduce the concept of community to cluster Web services based on their domain of interest. Each community is defined as an instance of an ontology called community ontology. We then propose a composability model to check whether semantic Web services can be combined together, hence avoiding unexpected failures at run time. The model defines formal safeguards for meaningful composition through the use of composability rules. We also introduce the notions of composability degree and tau-composability to cater for partial and total composability. Based on the composability model, we propose a set of algorithms that automatically generate detailed descriptions of composite services from high-level specifications of composition requests. We introduce a Quality of Composition (QoC) model to assess the quality of the generated composite services. The techniques presented in this dissertation are implemented in WebDG, a prototype for accessing e-government Web services. Finally, we conduct an extensive performance study (analytical and experimental) of the proposed composition algorithms.Ph. D.
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Eriksson, Maria. "WEB SERVICES FÖR MOBILAPPLIKATIONER : Utveckling av säkra RESTful web services för mobilapplikationer". Thesis, Örebro universitet, Akademin för naturvetenskap och teknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-15879.
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This report describes the development of a RESTful web service for mobile applications. The web service makes resources from an existing system called kompetensdatabasen ("the competence database") available. Kompetensdatabasen holds information about the capabilities of consultants and about assignments carried out at the IT consultant business Nethouse AB. The web service was developed according to the principles of REST and ROA (Resource Oriented Architecture) which puts focus on making resources available. The resources are made available through the HTTP protocol and the methods associated with it. This means it was designed to use the same technologies as the world wide web. Following these principles when designing the system has been of great importance. To make sure that the service does not leak information to competing companies or violate the Personal Data Act some kind of solution for securing the service had to be implemented. A model for authentication was produced to make the system accessible only for employees of the company.Rapporten beskriver utvecklandet av en RESTful web service för mobilapplikationer. Web servicen tillgängliggör resurser från ett befintligt system som kallas kompetensdatabasen. Kompetensdatabasen innehåller information om konsulters kompetenser och de uppdrag som utförts vid IT-konsultföretaget Nethouse AB. Web servicen utvecklades enligt principerna för REST och ROA (Resource Oriented Architecture) vilket innebär ett fokus på att tillgängliggöra resurser. Resurserna görs nåbara genom HTTP-protokollet och dess metoder, det vill säga samma tekniker som används på webben. Stor vikt har lagts på att designa systemet enligt dessa principer. För att servicen inte skulle läcka information till konkurrenter eller bryta mot personuppgiftslagen behövde någon form av säkerhetslösning implementeras. En autentiseringsmodell togs fram för att göra systemet nåbart enbart för anställda vid företaget.
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Hübsch, Chris. "Techniken von Web Services". Universitätsbibliothek Chemnitz, 2003. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200300813.
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Mustafa, Faisal. "Dynamic web services composition". Thesis, University of Huddersfield, 2014. http://eprints.hud.ac.uk/id/eprint/24698/.
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Emerging web services technology has introduced the concept of autonomic interoperability and portability between services. The number of online services has increased dramatically with many duplicating similar functionality and results. Composing online services to solve user needs is a growing area of research. This entails designing systems which can discover participating services and integrate these according to the end user requirements. This thesis proposes a Dynamic Web Services Composition (DWSC) process that is based upon consideration of previously successful attempts in this area, in particular utilizing AI-planning based solutions. It proposes a unique approach for service selection and dynamic web service composition by exploring the possibility of semantic web usability and its limitations. It also proposes a design architecture called Optimal Synthesis Plan Generation framework (OSPG), which supports the composition process through the evaluation of all available solutions (including all participating single and composite services). OSPG is designed to take into account user preferences, which supports optimality and robustness of the output plan. The implementation of OSPG will be con�gured and tested via division of search criteria in di�erent modes thereby locating the best plan for the user. The services composition and discovery-based model is evaluated via considering a range of criteria, such as scope, correctness, scalability and versatility metrics.
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Sabesan, Manivasakan. "Querying Mediated Web Services". Licentiate thesis, Uppsala : Department of Information Technology, Uppsala University, 2007. http://www.it.uu.se/research/publications/lic/2007-001/2007-001.pdf.
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Rabhi, Issam. "Testabilité des services Web". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00738936.
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Cette thèse s'est attaquée sous diverses formes au test automatique des services Web : une première partie est consacrée au test fonctionnel à travers le test de robustesse. La seconde partie étend les travaux précédents pour le test de propriétés non fonctionnelles, telles que les propriétés de testabilité et de sécurité. Nous avons abordé ces problématiques à la fois d'un point de vue théorique et pratique. Nous avons pour cela proposé une nouvelle méthode de test automatique de robustesse des services Web non composés, à savoir les services Web persistants (stateful) et ceux non persistants. Cette méthode consiste à évaluer la robustesse d'un service Web par rapport aux opérations déclarées dans sa description WSDL, en examinant les réponses reçues lorsque ces opérations sont invoquées avec des aléas et en prenant en compte l'environnement SOAP. Les services Web persistants sont modélisés grâce aux systèmes symboliques. Notre méthode de test de robustesse dédiée aux services Web persistants consiste à compléter la spécification du service Web afin de décrire l'ensemble des comportements corrects et incorrects. Puis, en utilisant cette spécification complétée, les services Web sont testés en y intégrant des aléas. Un verdict est ensuite rendu. Nous avons aussi réalisé une étude sur la testabilité des services Web composés avec le langage BPEL. Nous avons décrit précisément les problèmes liés à l'observabilité qui réduisent la faisabilité du test de services Web. Par conséquent, nous avons évalué des facteurs de la testabilité et proposé des solutions afin d'améliorer cette dernière. Pour cela, nous avons proposé une approche permettant, en premier lieu, de transformer la spécification ABPEL en STS. Cette transformation consiste à convertir successivement et de façon récursive chaque activité structurée en un graphe de sous-activités. Ensuite, nous avons proposé des algorithmes d'améliorations permettant de réduire ces problèmes de testabilité. Finalement, nous avons présenté une méthode de test de sécurité des services Web persistants. Cette dernière consiste à évaluer quelques propriétés de sécurité, tel que l'authentification, l'autorisation et la disponibilité, grâce à un ensemble de règles. Ces règles ont été crée, avec le langage formel Nomad. Cette méthodologie de test consiste d'abord à transformer ces règles en objectifs de test en se basant sur la description WSDL, ensuite à compléter, en parallèle, la spécification du service Web persistant et enfin à effectuer le produit synchronisé afin de générer les cas de test.
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Hanna, Samer. "Web services robustness testing". Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2378/.
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Web services are a new paradigm for building software applications that has many advantages over the previous paradigms; however, Web Services are still not widely used because Service Requesters do not trust services that were built by others. Testing can assuage this problem because it can be used to assess the quality attributes of Web Services. This thesis proposes a framework and presents a proof of concept tool that can be used to test the robustness and other related attributes of a Web Service. The tool can be easily enhanced to assess other quality attributes. The framework is based on analyzing Web Services Description Language (WSDL) documents of Web Services to find what faults could affect the robustness quality attributes. After that using these faults to build test case generation rules to assess the robustness quality attribute of Web Services. This framework will give a better understanding of the faults that may affect the robustness quality attribute of Web Services, how these faults are related to the interface or the contract of a Web Service under test, and what testing techniques can be used to detect such faults. The approach used in this thesis for building test cases for Web Services was used with many examples in order to demonstrate its effectiveness; these examples have shown that the approach and the proof of concept tool are able to assess the robustness of Web Services implementation and Web Services platforms. Four hundred and two test clients were automatically built by the tool, based on the test cases rules, to assess the robustness of these Web Services examples. These test clients detected eleven robustness failures in the Web Services implementations and nine robustness failures in the Web Services platforms. Also the approach was able to help in comparing the robustness of two different Web Services platforms, namely Axis and GLUE. After deploying the same Web Services in both of these platforms; Axis showed less robustness and security failures than GLUE.
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Arockiasamy, Britto N. "Trustworthiness of Web Services". UNF Digital Commons, 2014. http://digitalcommons.unf.edu/etd/531.
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Workflow systems orchestrate various business tasks to attain an objective. Web services can be leveraged to handle individual tasks. Before anyone intends to leverage service components, it is imperative and essential to evaluate the trustworthiness of these services. Therefore, choosing a trustworthy service has become an important decision while designing a workflow system. Trustworthiness can be defined as the likelihood of a service functioning as it is intended.
Selection of a service that satisfies business goals involves collecting relevant information such as security mechanisms, reliability, performance and availability. It is important to arrive at total trustworthiness, which incorporates all of the above mentioned multi-facet values relevant to a service. These values can be gathered and analyzed to derive the total trustworthiness of a service. Measuring trustworthiness of a service involves arriving at a suitable value that would help an end-user make a decision for the given business settings.
The primary focus of this thesis is to gather relevant details and measure trustworthiness based on inputs provided by the user. A conceptual model was developed after extensive literature review to identify factors that influence trustworthiness of a service. A mechanism was created to gather concept values for a given service and utilize those values to calculate trustworthiness index value. A proof-of-concept prototype was also developed. The prototype is a web-based application that implements the mechanism to measure the trustworthiness of the service. The prototype was evaluated using a scenario-based analysis method to demonstrate the utility of the trustworthiness mechanism using three different scenarios. Results of the evaluation shows that trustworthiness is a multidimensional concept, the relevant conceptual values can be collected, a trustworthiness index value can be calculated based on the gathered concepts, and a trustworthiness index can be interpreted to select the most relevant service for a given requirement.
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Costa, Rui Filipe Vital Guerreiro da. "Web services recovery mechanisms". Master's thesis, Faculdade de Ciências e Tecnologia, 2009. http://hdl.handle.net/10362/3929.
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Dissertação de Mestrado em Engenharia InformáticaIn web services context it is not possible to use the usual concept of ACID transactions because of several factors. For instance, business transaction in general have a long duration that can be extended to several months or can involve the coordination and interaction of activities executed by different partners. In these cases, atomicity is not preserved, therefore the usual recovery mechanisms cannot be used, like the rollback. In business transaction, failure treatment can be made by compensation mechanisms in which are defined actions of compensation for the actions that cannot be reverted automatically. The goal of this dissertation is to define a set of patterns that represent the common use of the recovery mechanisms at business level. A graphical notation of easy comprehension will be developed to show how the recovery mechanisms work to all kind of people with different background formation.
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Abi, Haidar Diala. "Web services access negotiation". Télécom Bretagne, 2008. http://www.theses.fr/2008TELB0089.
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Nous présentons dans cette thèse une approche flexible de contrôle d'accès au niveau des services Web. De nos jours, le contrôle d'accès est basé sur des approches binaires où les décisions d'accès sont toujours Accès interdit ou Accès autorisé. Un demandeur d'accès ne sait pas nécessairement d'avance les informations requises pour accéder à une ressource ; il n'a pas connaissance de la politique de contrôle d'accès qui gère l'accès à cette ressource. Par conséquent, certaines des informations requises peuvent être omises de la requête induisant une non-applicabilité des règles de sécurité contrôlant l'accès à la ressource du côté du fournisseur. Certains demandeurs d'accès légitimes peuvent ainsi se trouver interdit d'accès à une ressource car ils n'ont pas fournis certaines informations les caractérisant. Nous proposons de pallier les limites des approches existantes de contrôle d'accès. Nous donnons la possibilité à un demandeur d'accès coopératif d'aboutir à une réponse positive à sa requête. Nous introduisons un processus de contrôle d'accès négociable basé sur la classification de ressources. Ce processus est mis en oeuvre par deux modules, le module de négociation et le module de gestion d'exception. Le premier intercepte les requêtes d'accès, collecte les informations requises et échange des politiques. Le module de gestion d'exception est appelé suite à une exception levée au niveau de la négociation. Une exception est une situation d'accès interdit non négociable ou une création de boucle dans le processus de négociation. Le module de gestion des exceptions propose, si possible, des alternatives en cas d'exceptions. Nous classifions les ressources selon la manière et le besoin de les négocier. Nous définissons des politiques de négociation, dérivées des politiques de contrôle d'accès, spécifiant les attributs requis pour accéder à une ressource négociable. Nous proposons un protocole et des stratégies de négociation utilisés au niveau du module de négociation. Notre protocole de négociation peut implémenter quatre stratégies de négociation différentes qui vont de la divulgation de la l'ensemble de la politique de négociation jusqu'`a la révélation d'une seule condition de cette politique. Notre approche négocie des attributs nécessaires `a l'activation de permissions. Par conséquent, nous définissons un algorithme de réécriture de politiques qui permet de générer des permissions à partir de politiques comportants aussi bien des interdictions que des permissions. Nous introduisons XeNA, une architecture de négociation et de contrôle d'accès basée sur l'architecture eXtensible Access Control Markup Language (XACML). Nous avons choisi le profil Role Based Access Control (RBAC) de XACML pour le contrôle d'accès dans XeNA. Nous étendons ce profil pour répondre à des exigences avancées de contrôle d'accès et exprimer dans XACML plusieurs modèles de contrôle d'accès. Enfin, un prototype est développé pour implémenter et tester XeNA.
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Sam, Yacine. "Personnalisation de services web". Aix-Marseille 3, 2008. http://www.theses.fr/2008AIX30049.
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Dans cette thèse, nous nous intéressons à la personnalisation de services Web, ou à comment offrir un services Web sous plusieurs variantes de sorte à satisfaire le maximum possible de catégories différentes de clients. La personnalisation de services Web permet d'augmenter le taux de leur utilisation. Nous proposons un cadre général pour la compréhension des services Web personnalisables et du problème de personnalisation de services Web. Ce dernier consiste en la découverte pour un client donné de la variante d'un services Web personnalisable simple ou composite qui peut le satisfaire. Nous présentons des modèles pour la spécification de services Web personnalisables où la découverte et la composition de services Web sont réduites à des tâches de raisonnement dans un système à base de connaissance. Ces modèles sont considérés comme des langages d'annotation au dessus des langages de bas niveau de description de services Web. Nous proposons aussi une solution pour adapter, sous plusieurs variantes, des services Web conçus sous une seule varianteWe are interested in this thesis by the Web Services personalization, specifically on how to offer a Web Services in several variants in order to satisfy a large number of different Web Services clients. The Web Services personalization increases the usability of Web Services. We propose a general framework for understanding personalizable Web Services and the Web Services personalization problem. Such a problem consists in the discovery, for a specific client, of a given Web Services (simple or composite) variant that can satisfy it. We present some models for personalizable Web Services specification where theWeb Services discovery and composition are reduced to reasoning tasks in knowledge-based systems. These models are considered as annotation languages above existing low-level Web Services description languages. We also propose a solution allowing the adaptation, in many variants, of a Web Services offered only in one variant
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Gooneratne, Nalaka Dilshan y s3034554@student rmit edu au. "Discovery and Validation for Composite Services on the Semantic Web". RMIT University. Computer Science and Information Technology, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091019.155524.
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Current technology for locating and validating composite services are not sufficient due to the following reasons. Current frameworks do not have the capacity to create complete service descriptions since they do not model all the functional aspects together (i.e. the purpose of a service, state transitions, data transformations). Those that deal with behavioural descriptions are unable to model the ordering constraints between concurrent interactions completely since they do not consider the time taken by interactions. Furthermore, there is no mechanism to assess the correctness of a functional description. Existing semantic-based matching techniques cannot locate services that conform to global constraints. Semantic-based techniques use ontological relationships to perform mappings between the terms in service descriptions and user requests. Therefore, unlike techniques that perform either direct string matching or schema matching, semantic-based approaches can match descriptions created with different terminologies and achieve a higher recall. Global constraints relate to restrictions on values of two or more attributes of multiple constituent services. Current techniques that generate and validate global communication models of composite services yield inaccurate results (i.e. detect phantom deadlocks or ignore actual deadlocks) since they either (i) do not support all types of interactions (i.e. only send and receive, not service and invoke) or (ii) do not consider the time taken by interactions. This thesis presents novel ideas to deal with the stated limitations. First, we propose two formalisms (WS-ALUE and WS-π-calculus) for creating functional and behavioural descriptions respectively. WS-ALUE extends the Description Logic language ALUE with some new predicates and models all the functional aspects together. WS-π-calculus extends π-calculus with Interval Time Logic (ITL) axioms. ITL axioms accurately model temporal relationships between concurrent interactions. A technique comparing a WS-π-calculus description of a service against its WS-ALUE description is introduced to detect any errors that are not equally reflected in both descriptions. We propose novel semantic-based matching techniques to locate composite services that conform to global constraints. These constraints are of two types: strictly dependent or independent. A constraint is of the former type if the values that should be assigned to all the remaining restricted attributes can be uniquely determined once a value is assigned to one. Any global constraint that is not strictly dependent is independent. A complete and correct technique that locates services that conform to strictly dependent constraints in polynomial time, is defined using a three-dimensional data cube. The proposed approach that deals with independent constraints is correct, but not complete, and is a heuristic approach. It incorporates user defined objective functions, greedy algorithms and domain rules to locate conforming services. We propose a new approach to generate global communication models (of composite services) that are free of deadlocks and synchronisation conflicts. This approach is an extension of a transitive temporal reasoning mechanism.
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Schwarz, Michael. "Web Services och säkerhet : - en studie i tekniker för att säkra Web Services". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1013.
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Användandet av Web Services har ökat de senaste åren, det är relativt lätt att utveckla dessa tjänster och de kan användas i de allra flesta miljöer. Ett bekymmer är dock säkerhetsfrågan. Denna uppsats studerar de vanligaste teknikerna för att säkra Web Services, beskriver hur de kan användas samtidigt diskuterar fördelar och nackdelar med flera av dem. Till sist ges förslag på hur Web Services i olika typer av miljöer kan säkras.
The usage of Web Services has increased during recent years, its relatively easy to develop and can be used in almost any environment. One concern however is the security aspect. This essay studies the most common techniques for securing Web Services and describes how they can be used. It also discusses some pros and cons about them. Finally this paper suggests some ways to secure Web Services used in different environment.
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Luna, Filho Antonio Luis do Rêgo. "SISTEMA ESPECIALISTA PARA TELEDIAGNÓSTICO NO AMBIENTE DE WEB SERVICES WST Web Services Telediagnosis". Universidade Federal do Maranhão, 2005. http://tedebc.ufma.br:8080/jspui/handle/tede/394.
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Previous issue date: 2005-09-30This work approaches the telemedicine through an area of study about telediagnosis. The solution proposed here will be the development of an expert system which has the objective of sharing rule base in an internet environment, using the web services technology. The knowledge basis of expert system will be built on malaria diseases. Some technologies such as: the JESS - Java Expert System Shell, the Java language and also Protegé tool to ontologies generations. The major interest of this project is to attend communities located far from cities giving them accurate medical support.
Este trabalho aborda a telemedicina através da área de estudo sobre o telediagnóstico. O maior objetivo é desenvolver um mecanismo de inferência utilizando uma ferramenta chamada JESS Java Expert System Shell, para diagnosticar malária, disponibiliza-lo como serviço no ambiente da internet através de um framework para construção de Web Services, para que se possa oferecer uma solução às regiões menos favorecidas. Algumas tecnologias irão dar suporte ao trabalho, como o software Protegé, que será usado na modelagem do conhecimento acerca da malária, através de ontologias e a UML Unified Modeling Language para modelagem do protótipo do mecanismo de inferência.
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Youn, Choonhan Fox Geoffrey C. "Web services based architecture in computational Web portals". Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
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Wei, Yanfang. "Control synchronous web-based training using web services". ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,145.
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Thesis (M.S.)--University of New Orleans, 2004.Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Computer Science."--Thesis t.p. Vita. Includes bibliographical references.
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Wong, Ka Wah. "Web services adaptation by using Web application wrapper /". View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?COMP%202004%20WONG.
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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.Includes bibliographical references (leaves 68-70). Also available in electronic version. Access restricted to campus users.
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LINS, Fernando Antonio Aires. "Composição adaptativa de Web services". Universidade Federal de Pernambuco, 2007. https://repositorio.ufpe.br/handle/123456789/2708.
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Previous issue date: 2007Web services têm desempenhado um importante papel no desenvolvimento de aplicações distribuídas. Em particular, a possibilidade de composição de serviços já implementados com o intuito de prover uma nova funcionalidade se constitui uma abordagem interessante para a construção de sistemas distribuídos e de processos de negócios (business processes), na medida em que diminui o tempo total de desenvolvimento e promove a reusabilidade de serviços já testados e utilizados. A possibilidade de realizar a composição de web services de forma dinâmica, em tempo de execução, aparece nesse contexto com uma elevada importância. A composição dinâmica permite que mudanças sejam percebidas pelo sistema durante a sua execução, sem a necessidade de reinicialização de sistemas, o que poderia levar a indisponibilidade do serviço e a possível perda de clientes. Algumas propostas têm surgido para composição dinâmica de web services, mas elas não adotam especificações já estáveis e notadamente difundidas, como WS-BPEL. Ao mesmo tempo, estas propostas usualmente implicam em modificações nas regras da especificação dos processos de negócios, dificultando ainda mais a implementação do sistema. Este trabalho propõe uma nova abordagem para possibilitar a adaptabilidade na composição de web services através de modificações na semântica da primitiva de invocação de serviços, mantendo a sintaxe do principal padrão existente para este fim (WS-BPEL) inalterada. A partir das modificações propostas, programadores podem definir composições dinâmicas de web services sem alterar o código fonte da aplicação. Como implementar a adaptação passa a ser tarefa do ambiente e não do programador, o que torna esta tarefa mais transparente para o mesmo. Por fim, a adaptabilidade surgiria como mais uma possibilidade no projeto, mantendo todas as outras características da composição inalteradas
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Shulman, Lev. "Automated Discovery, Binding, and Integration Of GIS Web Services". ScholarWorks@UNO, 2007. http://scholarworks.uno.edu/td/539.
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The last decade has demonstrated steady growth and utilization of Web Service technology. While Web Services have become significant in a number of IT domains such as eCommerce, digital libraries, data feeds, and geographical information systems, common portals or registries of Web Services require manual publishing for indexing. Manually compiled registries of Web Services have proven useful but often fail to include a considerable amount of Web Services published and available on the Web. We propose a system capable of finding, binding, and integrating Web Services into an index in an automated manner. By using a combination of guided search and web crawling techniques, the system finds a large number of Web Service providers that are further bound and aggregated into a single portal available for public use. Results show that this approach is successful in discovering a considerable number of Web Services in the GIS(Geographical Information Systems) domain, and demonstrate improvements over existing methods of Web Service Discovery.
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Figueiredo, Rafael Saraiva. "Name service for accessing personal services from Web servers". Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/18566.
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Mestrado em Engenharia de Computadores e TelemáticaO propósito desta tese teve como base o desenvolvimento de um mecanismo que permitisse que servidores Web (ou serviços) descobrissem e usassem serviços Web que executam localmente em relação aos clientes Web (serviços pessoais). Para conseguir isto, desenvolvemos uma solução que permita a um servidor de nomes local a descoberta de serviçoos pessoais (i.e., resolver nomes para referências para serviços) e uma solução que permita aos servidores Web a possibilidade de invocar esses serviços pessoas usando as referências obtidas. A comunicação entre os servidores Web e o servidor de nomes local ou os serviços pessoais e mediada pelo cliente Web local (um navegador) usando um novo mecanismo de redireção HTTP.
HTTP, Web service, personal service, Broker, browser, HTTP redirection, name server. The purpose of this thesis was to devise a mechanism to allow Web servers (or services) to nd out and use other Web services running locally to Web clients (personal services). To do so, we had to create a solution for having a local name server to nd out personal services (i.e., resolve names to service handles) and a solution for allowing Web servers to invoke personal services given those handles. The communication between the Web servers and the local name server or the personal services is mediated by the Web client (a browser) using a new HTTP redirection mechanism.
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Kallbach, Maria. "Orchestrierung von Geo Web Services". Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-25142.
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Das Ziel der Diplomarbeit bestand darin eine Testumgebung zur Orchestrierung von Geo Web Services aufzubauen. Dabei diente die Diplomarbeit "Orchestrierung von Web Services" von Jäger/Weidenhagen als Grundlage. Um ein Verständnis für dieses Gebiet zu bekommen, werden zu Beginn die Grundlagen betrachtet. Rechtliche Aspekte zum Thema Orchestrierung werden angegeben, um die Wichtigkeit des Themas zu unterstreichen. Eingängige Standards wie SOAP und WSDL werden in ihren Kernpunkten erläutert. Insbesondere bei SOAP wird näher darauf eingegangen. Neben den OWS besteht auch die Möglichkeit Geo-Datenbanken in Diensteketten einfließen zu lassen. Dafür werden exemplarisch Dienste aufgesetzt, die dies ermöglichen.
Weiterhin werden die Benutzerschnittstellen von Web Services (und auch Diensteketten) untersucht. Die Option eines Clients mittels Scriptsprachen wird beschrieben. Dabei erwies sich PHP am geeignetsten. Auf diese Weise kann für jede Dienstekette eine dynamische Webseite gestaltet werden, die eine graphische Schnittstelle für den Nutzer bietet.
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Martins, Rogério Samuel de Moura. "Composição dinâmica de web services". Universidade do Vale do Rio do Sinos, 2007. http://www.repositorio.jesuita.org.br/handle/UNISINOS/2251.
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Previous issue date: 29Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
As invocações a serviços disponíveis na internet são construídas de forma estática, sempre referenciando o mesmo web service e o mesmo web method. Quando este serviço apresentar baixa disponibilidade o desempenho da aplicação será reduzido. Para evitar este problema é necessário que a aplicação tenha a habilidade de identificar o melhor serviço disponibilizado e então possa invocá-lo. A inserção de novos protocolos e novas funcionalidades na arquitetura de web services pode permitir que as aplicações encontrem serviços disponíveis na internet e, além disso, possam medir a qualidade do serviço disponível e assim direcionar sua chamada para o melhor serviço. Padrões de projeto são usados como um instrumento para uma melhor compreensão da arquitetura proposta
The invocations to available services in the internet are built in a static way, always referring the same web service and the same web method. When this service presents low readiness the performance of the application it will be reduced. To avoid this problem it is necessary that the application has the ability to identify the best made available service and then it can invoke it. The insert of new protocols and new functionalities in the architecture of web services can allow the applications to find available services in the internet and, besides, they can measure the quality of the available service and like this to address his call for the best service. Design patterns are not a lust, but an instrument for a better understanding of the proposed architecture
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Kallbach, Maria. "Orchestrierung von Geo Web Services". Master's thesis, Hochschule für Technik und Wirtschaft Dresden, 2009. https://slub.qucosa.de/id/qucosa%3A634.
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Das Ziel der Diplomarbeit bestand darin eine Testumgebung zur Orchestrierung von Geo Web Services aufzubauen. Dabei diente die Diplomarbeit "Orchestrierung von Web Services" von Jäger/Weidenhagen als Grundlage. Um ein Verständnis für dieses Gebiet zu bekommen, werden zu Beginn die Grundlagen betrachtet. Rechtliche Aspekte zum Thema Orchestrierung werden angegeben, um die Wichtigkeit des Themas zu unterstreichen. Eingängige Standards wie SOAP und WSDL werden in ihren Kernpunkten erläutert. Insbesondere bei SOAP wird näher darauf eingegangen. Neben den OWS besteht auch die Möglichkeit Geo-Datenbanken in Diensteketten einfließen zu lassen. Dafür werden exemplarisch Dienste aufgesetzt, die dies ermöglichen.
Weiterhin werden die Benutzerschnittstellen von Web Services (und auch Diensteketten) untersucht. Die Option eines Clients mittels Scriptsprachen wird beschrieben. Dabei erwies sich PHP am geeignetsten. Auf diese Weise kann für jede Dienstekette eine dynamische Webseite gestaltet werden, die eine graphische Schnittstelle für den Nutzer bietet.
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Chabeb, Yassin. "Contributions à la description et la découverte de services web sémantiques". Phd thesis, Institut National des Télécommunications, 2011. http://tel.archives-ouvertes.fr/tel-00843597.
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Les travaux de recherche menés autour de la description de services Web utilisent de plus en plus des modèles sémantiques pour fournir une représentation interprétable automatiquement. Toutefois, nous avons décelé des lacunes dans les approches sémantiques actuelles qui engendrent ambiguïté et non pertinence au niveau de l'appariement et de la découverte de services Web. Pour remédier à ces lacunes nous proposons des contributions à la description et à la découverte de services Web sémantiques. En ce qui concerne la description de services, nous avons défini un langage basé sur une recommandation W3C. En plus d'une annotation métier sémantique des éléments d'un service, notre principale contribution à la description sémantique consiste à spécifier la nature de ces annotations en utilisant une ontologie technique que nous avons définie. Cette ontologie met en relation plusieurs concepts sémantiques de services Web que nous avons identifiés dans des approches existantes et intègrera d'autres concepts qu'on définira ultérieurement sans pour autant modifier notre langage de description ou nos techniques d'appariement associées. Nous avons également défini un algorithme d'appariement entre une requête de service et les descriptions des services publiés. Cet algorithme se base sur un appariement entre éléments d'une requête et un service publié et trois techniques d'agrégation des résultats d'appariements élémentaires. L'algorithme tire avantage de la description sémantique que nous avons définie. Il a été mis en œuvre dans un annuaire de services Web sémantiques et a été également comparé aux algorithmes de référence. Les expérimentations montrent clairement l'efficacité de notre approche en termes de temps de réponse et de précision
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Чеботарьова, Д. В. y В. О. Безлуцький. "Використання технології Amazon WEB Services для обслуговування сервісів". Thesis, ФОП Петров В. В, 2020. https://openarchive.nure.ua/handle/document/16406.
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У збірнику подано тези доповідей восьмої міжнародної науково-технічної конференції “Проблеми інформатизації”. Розглянуті питання за такими напрямами: інформатизація навчального процесу; безпека функціонування, застосування та експлуатація телекомунікаційних систем та мереж; комп’ютерні методи і засоби інформаційних технологій та управління; методи швидкої та достовірної обробки даних в комп’ютерних системах та мережах; сучасні інформаційновимірювальні системи; цивільна безпека (інформаційна підтримка).
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Wu, Chen. "Service distribution and service discovery through a public web services platform". Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/387.
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Service-Oriented Architecture (SOA) represents an emerging architectural approach that is able to tackle challenges in the contemporary service-based economy, in which the global market revenues are shifting from the manufacture of traditional off-the-shelf products to the provision of diversified services that suffice for customers’ needs. In such a service-based economy, one can envisage an entirely “service-oriented” world, where a massive number of distributed services with different natures and capabilities are provided by various professionals around the world. Problems arise when business applications demand desirable services through different sources and providers that are appropriate for their own benefits and preferences. Therefore, it can be very challenging to design an SOA infrastructure that enables users to exploit this great level of service heterogeneity and quantity. One of the key issues in service-oriented architecture is to achieve efficient service discovery and loosely-coupled service distribution while maintaining a satisfactory degree of scalability, usability, and Web consistency. This thesis deals with SOA infrastructure-level design and implementation issues. It approaches this SOA infrastructure within the scope of Web services, which capture an important, and perhaps the best, ‘realisation’ of SOA. It investigates and formulates how public Web services distributed across the World Wide Web can be augmented by a software platform that enables scalable, user-centred,semantic-enabled, and integration-oriented service retrieval, selection, and matching. The primary goal of this thesis is thus to propose a conceptual framework of an enhanced SOA infrastructure with regard to service distribution and discovery.It also aims to design and implement a platform (PWSP), by means of which a large number of public Web services on the Web can be distributed based on service demands, retrieved based on service descriptions, selected based on service qualities, and matched based on service messages in a user-centred, scalable, and Web-consistent manner without augmenting existing Web services standards.
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Wu, Chen. "Service distribution and service discovery through a public web services platform". Curtin University of Technology, Digital Ecosystems and Business Intelligence Institute, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17919.
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Service-Oriented Architecture (SOA) represents an emerging architectural approach that is able to tackle challenges in the contemporary service-based economy, in which the global market revenues are shifting from the manufacture of traditional off-the-shelf products to the provision of diversified services that suffice for customers’ needs. In such a service-based economy, one can envisage an entirely “service-oriented” world, where a massive number of distributed services with different natures and capabilities are provided by various professionals around the world. Problems arise when business applications demand desirable services through different sources and providers that are appropriate for their own benefits and preferences. Therefore, it can be very challenging to design an SOA infrastructure that enables users to exploit this great level of service heterogeneity and quantity. One of the key issues in service-oriented architecture is to achieve efficient service discovery and loosely-coupled service distribution while maintaining a satisfactory degree of scalability, usability, and Web consistency. This thesis deals with SOA infrastructure-level design and implementation issues. It approaches this SOA infrastructure within the scope of Web services, which capture an important, and perhaps the best, ‘realisation’ of SOA. It investigates and formulates how public Web services distributed across the World Wide Web can be augmented by a software platform that enables scalable, user-centred,semantic-enabled, and integration-oriented service retrieval, selection, and matching. The primary goal of this thesis is thus to propose a conceptual framework of an enhanced SOA infrastructure with regard to service distribution and discovery.It also aims to design and implement a platform (PWSP), by means of which a large number of public Web services on the Web can be distributed based on service demands, retrieved based on service descriptions, selected based on service qualities, and matched based on service messages in a user-centred, scalable, and Web-consistent manner without augmenting existing Web services standards.
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Rosario, Sidney. "Qualité de Services dans les compositions des services Web". Rennes 1, 2009. http://www.theses.fr/2009REN1S177.
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Les services Web et leurs compositions sont utilisés de plus en plus ces derniéres années. Les orchestrations de services Web sont des compositions de services Web ayant une entité centrale – ''l'orchestrateur'' - qui appelle d'autres services Web de diverses manières (en parallèle / en série, etc), et combinent leurs réponses afin de former un nouveau service Web composé. Dans les milieux d'affaires, le comportement non-fonctionnel d'un service - ou la qualité de service (QoS) - est d'une grande importance car il est une composante importante pour le succès d'un service. Dans cette thèse nous proposons une théorie de la QoS pour les orchestrations des services Web, et nous développons un cadre pour la gestion de la QoS dans les orchestrations. Nous adoptons une approche basée sur les /contrats/ pour la gestion de la QoS, où les services appelés par l'orchestrateur sont considérés comme des ``sous-traitants'', et ont des contrats avec l'orchestrateur. Ces contrats précisent à la fois les comportements fonctionnel et non fonctionnel d'un service. Nous proposons l'utilisation de contrats probabilistes, pour prendre en compte la variabilité inhérente aux comportements non-fonctionnels d'un service. Une approche basée sur les contrats suppose implicitement que lorsque la performance d'un service s'améliore, la performance de l'orchestration, à son tour s'améliore. Nous montrons que cette propriété, que nous appelons ``la monotonie'', peut être facilement violée dans les orchestrations. Nous donnons des conditions nécessaires et suffisantes pour qu'une orchestration soit monotone. Nous montrons comment les contrats probabilistes peuvent être composés en un contrat que l'orchestrateur peut proposer à ses propres clients. Nous donnons également une méthode pour surveiller ces contrats, à l'aide de techniques statistiques. Notre approache est concrétisée par un outil construit sur un interpréteur d'Orc, un langage d'orchestrationWeb services and their compositions have become increasingly pervasive in recent years. Web service orchestrations are Web service compositions involving a central entity - the ''orchestrator'' - which calls other Web services in various orders (in parallel/sequence, etc), combining their responses in different ways to form a new Web service in itself. In business environments, the non-functional - or the Quality of Service (QoS) - behaviour of the services is of high importance and it can alone decide the success or the failure of a service. In this thesis we propose a theory of QoS for Web Service orchestrations, and develop a framework for the management of QoS in orchestrations. We adopt a /contract-based/ approach for managing QoS, where the services called by the orchestrator are seen as its 'sub-contractors', and have contracts with the orchestrator. These contracts specify the behaviour of both the functional and the non-functional or the QoS aspects of the service. We propose the use of ''soft probabilistic contracts'', to capture the inherent variability in QoS behaviours. A contract-based approach implicitly assumes that when the performance of a contracted service improves, the performance of the orchestration as a whole in turn improves. We show that this property, that we call ``monotonicity'', can be easily violated in orchestrations. We give necessary and sufficient conditions for monotonicity to hold. We show how probabilistic contracts can be composed to derive a contract that the orchestrator can offer to its own clients. We also give a method to monitor these probabilistic contracts, using statistical techniques. Our whole framework is supported by an implementation over a Java interpreter of Orc, an orchestration language
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Damaraju, Sarita. "Performance measurements of Web services". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4581.
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Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains v, 42 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 32-34).
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Ekelund, Marcus y Andreas Larsson. "Web Services : A Comparative Study". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-23.
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This Master thesis enhances an existing library search system with a new dynamic web interface and introduces the ability to perform remote searches by using Web Services. The remote search functionality also includes the ability to compress SOAP-messages, this functionality is optional. The system is implemented using the Microsoft.NET Framework with Visual Studio C#. A library needs to store information about articles and we have chosen to use a Sybase Adaptive Server Anywhere database.
The practical part of this thesis describes the architecture of our implementation and the design process.
The theoretical part is a comparative study between dynamically created web pages and static pages, SOAP-compression versus no compression, SOAP-optimization versus no optimisation and the use of Web Services locally versus local classes.
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Persson, Anders. "Improving reusability with Web Services". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-511.
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This master’s thesis discusses the evolution of DataPartner’s application "Inventera". Inventera is designed to do inventory of stock on handheld computers and integartes with SPCS Administration. Inventera is enhanced with a wireless connection and the SPCS API is wrapped with Web Services. The theoretical part of this thesis examines diffrent possibilities to increase reusability by using web service technology when developing software. A case study of the SPCS API is used in order to study differences between using no Web Services at all, static web services or dynamic web services.
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Sabesan, Manivasakan. "Querying Data Providing Web Services". Doctoral thesis, Uppsala universitet, Avdelningen för datalogi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-128928.
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Web services are often used for search computing where data is retrieved from servers providing information of different kinds. Such data providing web services return a set of objects for a given set of parameters without any side effects. There is need to enable general and scalable search capabilities of data from data providing web services, which is the topic of this Thesis. The Web Service MEDiator (WSMED) system automatically provides relational views of any data providing web service operations by reading the WSDL documents describing them. These views can be queried with SQL. Without any knowledge of the costs of executing specific web service operations the WSMED query processor automatically and adaptively finds an optimized parallel execution plan calling queried data providing web services. For scalable execution of queries to data providing web services, an algebra operator PAP adaptively parallelizes calls in execution plans to web service operations until no significant performance improvement is measured, based on monitoring the flow from web service operations without any cost knowledge or extensive memory usage. To comply with the Everything as a Service (XaaS) paradigm WSMED itself is implemented as a web service that provides web service operations to query and combine data from data providing web services. A web based demonstration of the WSMED web service provides general SQL queries to any data providing web service operations from a browser. WSMED assumes that all queried data sources are available as web services. To make any data providing system into a data providing web service WSMED includes a subsystem, the web service generator, which generates and deploys the web service operations to access a data source. The WSMED web service itself is generated by the web service generator.eSSENCE
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Chan, Yue-Kong Kenneth. "Web services and agents integration /". View document on the Internet, 2006. http://library.athabascau.ca/drr/download.php?filename=scis/Yue-Kong(Kenneth)ChanEssay.pdf.
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Project (M.Sc)--Athabasca University, 2006."An essay submitted in partial fulfillment of the requirements for the degree of Master of science in information systems"--t.p. Includes bibliographical references (leaves 71-78).
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Zaguia, Atef. "Fusion multimodale et services Web". Mémoire, École de technologie supérieure, 2010. http://espace.etsmtl.ca/665/1/ZAGUIA_Atef.pdf.
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De nos jours, la technologie nous permet de produire des systèmes extensibles et entièrement contrôlés par l'humain. Ces systèmes sont équipés par des interfaces multimodales permettant une interaction plus naturelle et plus efficace entre la personne et la machine. Les utilisateurs peuvent profiter des modalités naturelles ( la parole, le geste, les yeux...etc.) pour communiquer ou échanger des informations avec les applications ou les systèmes. l'utilisation des applications multimodales avec les services web, integrée avec des modalités naturelles, est une solution efficace pour les utilisateurs, en particulier pour ceux qui ne peuvent pas utiliser un clavier ou une souris, les utilisateurs malvoyants, les utilisateurs qui sont équipés d'appareils mobiles, les utilisateurs qui sont infirmes...etc. Notre travail présente une approche dans laquelle les modaalités d'entrées variantes ( parole, écran tactil, clavier...etc.) sont mises à la disposition de l'utilisateur dans le but d'accéder aux services web. La technique utilisée dans l'état d'art présente une approche avec deux modalités prédéfinies. Notre approche permet l'utilisation d'un nombre infini de modalités (d'un point de vue conceptuel) en utilisant un niveau sémantique appelé "Multimodal Fusion". Une telle approche donne à l'utilisateur la possibilité d'utiliser les modalités qu'il juge appropriées à sa situation. La description détaillée de l'approche proposée, ainsi que l'application qui a été élaborée, sont présentées dans ce mémoire.
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Zhu, Yonghan 1971. "Web services : framework and technologies". Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80907.
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Immediately after its appearance in 1999, Web Services has become the hottest topic in the information technology industry. Web Services was primarily fostered by the exponentially growing demand for highly efficient Business-to-Business (B2B) solutions.Web Services is a highly modularized application level framework. Its fundamental idea is to enable Web applications to interact with each other regardless of platforms, languages or network infrastructure used. This understanding has been accepted and shared by current Web Services vendors, users, professionals and standards organizations. Meanwhile, Web Services concepts, architecture, components, working models and direction are still under debate. This thesis provides an introduction to these topics based on a thorough research across existing materials.
The first part of this thesis clarifies the architecture and basic concepts of Web Services. The second part provides a complete introduction and analysis of the two groups of technologies stated above, and shows how these technologies work together. The third part of this thesis presents a discussion of the advantages and potential applications of Web Services. It is based on the perspectives of a variety of technical experts and solution designers. (Abstract shortened by UMI.)
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Looker, Nik. "Dependability analysis of Web services". Thesis, Durham University, 2006. http://etheses.dur.ac.uk/2888/.
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Web Services form the basis of the web based eCommerce eScience applications so it is vital that robust services are developed. Traditional validation and verification techniques are centred around the concept of removing all faults to guarantee correct operation whereas Dependability gives an assessment of how dependably a system can deliver the required functionality by assessing attributes, and by eliminating threats via means attempts to improve dependability. Fault injection is a well-proven dependability assessment method. Although much work has been done in the area of fault injection and distributed systems in general, there appears to have been little research carried out on applying this to middleware systems and Web Services in particular. There are additional problems associated with applying existing fault injection technologies to Web Services running in a virtual machine environment since most are either invasive or work at a machine level. The Fault Injection Technology (FIT) method has been devised to address these problems for middleware systems. The Web Service-Fault Injection Technology (WS-FIT) implementation applies the FIT method, based on network level fault injection, to Web Services to create a non-invasive dependability assessment method. It allows targeted perturbation of Web Service RFC parameters as well as more traditional network level fault injection operations. The WS-FIT tool includes taxonomies that define a system under test, fault models to apply and failure modes to be detected, and uses these taxonomies to generate fault injection campaigns. WS-FIT has been applied to a number of case studies and has successfully demonstrated its effectiveness. It has also been successfully applied to a third-party system to evaluate dependability means. It performed this dependability assessment as well as allowing debugging of the means to be undertaken uncovering unknown faults.
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Shelton, William T. (William Trotter) 1966. "Web services : a strategic analysis". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/7961.
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Thesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 2003.Includes bibliographical references (leaves 70-75).
This thesis is an investigation of the strategic impact of Web Services on the firm. A literature review was conducted to gain a broad understanding of the research previously done on various related subjects. The core of this thesis is focused on looking at Web Services using time-tested, generally-accepted strategic management frameworks in order to better understand the true potential impact of Web Services. Utilizing in-depth interviews with industry leaders, comprehensive knowledge of Web Services technology, and seminal academic research where appropriate, the author has attempted to derive the strategic implications of Web Services over a three- to five-year horizon.
by William T. Shelton, Jr.
S.M.M.O.T.
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Lombardi, John J. "Securing Web Based Transaction Services". NSUWorks, 2003. http://nsuworks.nova.edu/gscis_etd/682.
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The challenge of securing of Web based transaction services continues to influence the development and evolution of ecommerce and Web Services. This problem had driven the computer industry and standards organizations to introduce a number of security measures in an attempt to compensate for the growing security concerns of enterprises and the software development community. These efforts have not yielded a standardized architectural framework to securing Web based transaction services. The research that was conducted provided a solution to this problem by using a unique combination of technologies and architectural design techniques that provided a security framework for these transactions. The research model defined an architectural framework that incorporated infrastructure technologies, including Public Key Infrastructure (PKI), Secure Socket Layer (SSL) and Lightweight Directory Protocol (LDAP), along with XML security and a set of SOAP specification extensions that when used in conjunction with custom Java components provided an environment for secure web based transaction services. This framework used a centralized operational model that represented behavioral, security and resource location parameters in an LDAP repository. The custom Java components of the framework provided client driven capabilities that allowed a client and service provider to establish a secure transaction relationship by using a predetermined negotiation protocol that captured these parameters in the LDAP repository. The parameters defined the trust relationship in the LDAP repository and were communicated in SOAP messages using Directory Service Markup Language (DSML). These DSML SOAP messages were used with custom SOAP extensions that applied a set of operational design patterns that communicated transaction behavior between client and service provider to ensure security of the Web based transactions. The research model used this extended SOAP model and XML security to provide message level confidentiality, authentication, authorization, content integrity and non-repudiation. The framework provided these security characteristics within a SOAP messaging environment that provided end-to-end message security, application independence, transport protocol independence, intermediary soap server processing capabilities, message protection during transmission and storage and notary service capabilities.
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Chakravaram, Vijay. "Social networking using web services". Kansas State University, 2016. http://hdl.handle.net/2097/32594.
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Master of ScienceDepartment of Computing and Information Sciences
Daniel Andresen
Web services have expanded to become popular in application development. Web services technology represents an important way of communication between different applications across different platforms. Unlike traditional client/server models, such as a Web application or Web page system, Web services do not provide the user with a GUI. Instead, Web services share business logic, functionality and data through a programmatic interface across a network. Web services are services or functionalities that are exposed to the internet and serves as online or web APIs. These services which are online APIs can be called from your code and use the results in your applications to offer specific functionality to users. This project consists of two applications the client and the server application. The server application is an online REST API (Web Services developed using REpresentational State Transfer (REST) protocol) which provides all the functionalities as a service across the network that are required to develop a social networking web application. The client application is similar to any other social networking web application where you can create a profile, delete profile, send messages to your friends, post things, like and comment a post. This applications sends request to the server application using HTTP requests and get the responses. These responses are then consumed in the application to provide the required functionalities to the end user.
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Oliveira, Alex Lopes de. "Instrumentação inteligente via web services". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-13122006-150545/.
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Neste trabalho é apresentado um sistema de instrumentação inteligente integrado com a arquitetura Web Services e desenvolvido em conformidade com as diretrizes estabelecidas na norma IEEE 1451.1. O protocolo de transmissão de dados do sistema é associado ao conceito das especificações dos transdutores e a um Web Service que permita a configuração remota do sistema de aquisição de dados. Através de uma interface de supervisão remota, acessível via Internet a partir de qualquer navegador, o usuário é capaz de identificar quais são os sensores inteligentes que estão conectados em uma rede, através de uma identificação única associada às suas características (tipo, formatação dos dados, etc.). Nesta mesma interface de apresentação o usuário tem a liberdade de selecionar o número de sensores que deseja ativar para efetuar algum monitoramento. Após a seleção dos sensores é disponibilizada uma interface de monitoramento que permite a visualização dos dados através de um gráfico bem como permite ao usuário salvar em um arquivo texto os dados coletados. Na mesma interface de monitoramento é disponibilizado o Web Service que permite alterar o intervalo de coleta de dados. Um conjunto de computadores em uma rede local (Intranet) simula a rede de sensores inteligentes. Nesta mesma rede está conectado o servidor responsável pela disponibilização da interface de supervisão remota.In this work is presented the integration of an established system of intelligent instrumentation with the Web Service?s architecture, in accordance with the IEEE 1451.1 standard. It is suggested the association of a data-communication protocol with the concept of Transducer Electronic Data Sheet (TEDS) to a Web Service for making possible the remote configuration of a data acquisition system. Through a remote supervisor interface, accessible via Internet from any browser, the user can, at the first moment, identify which are the smart sensors connected in a network, using an unique identification associated to its characteristics (type, data formatting, etc.). In the same graphical interface the user can choose which sensors wants to monitor and, after the selection, will have available the monitoring interface that enables data visualization through a graph and allows the user to save the collected data in a text file. In the same monitoring interface the Web Service is also available; it admits modifications on the data collection interval. A group of computers in a local network (Intranet) simulates the smart sensors network. In the same network is connected a server responsible for supplying the remote supervisor interface.
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Ouzzani, Mourad. "Efficient Delivery of Web Services". Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/27360.
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This dissertation addresses issues for the efficient access to Web databases and services. We propose a distributed ontology for a meaningful organization of and efficient access to Web databases. Next, we dedicate most of our work on presenting a comprehensive query infrastructure for the emerging concept of Web services. The core of this query infrastructure is to enable the efficient delivery of Web services based on the concept of Quality of Web Service. Treating Web services as first class objects is a fundamental step towards achieving the envisioned Semantic Web. Semantics-aware processing of information requires intensive use of Web services. In our research, we propose a new query model where queries are resolved by combining Web service invocations. To efficiently deploy such scheme, we propose an optimization strategy based on aggregating Quality of Web service (QoWS) of different Web services. QoWS is adjusted through a dynamic rating scheme and multilevel matching. Web service rating provides an assessment of their behavior. The multilevel matching allows a larger solution space by enabling similar and partial answers.Ph. D.
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Maleček, David. "Trh web services v ČR". Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-1316.
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Cílem této diplomové práce je popsat trh webových služeb v České republice a poskytnout přehled předních dodavatelů a jejich produktů. Práce je rozdělena na tři hlavní části, které jsou dále členěny do jednotlivých kapitol. První část je věnována vymezení pozice a úlohy webových služeb v rámci celého IS/ICT. Popisuji zde hlavní oblasti uplatnění této technologie. Zároveň se věnuji jejím výhodám a vlastnostem. Ve druhé části se zabývám dvěma pohledy na webové služby ? pohledem vývojáře a pohledem architekta IS. Zde také čtenáře seznamuji s jednotlivými standardy, na kterých jsou webové služby založeny (SOAP, WSDL, UDDI). Třetí část je zaměřena na přehled předních dodavatelů webových služeb a jejich produktů. Součástí je také přehled některých implementací webových služeb v ČR a softwarových firem, které tyto implementace zajišťují. Také zde popisuji úroveň podpory webových služeb v ERP systémech dostupných na současném českém trhu. Následuje zhodnocení situace na trhu webových služeb. Při psaní této práce jsem se opíral jednak o vlastní znalosti a jednak o odbornou literaturu a zdroje na Internetu.
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Jain, Arihant. "Plug-and-Play Web Services". DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7646.
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The goal of this research is to make it easier to design and create web services for relational databases. A web service is a software service for providing data over computer networks. Web services provide data endpoints for many web applications. We adopt a plug-and-play approach for web service creation whereby a designer constructs a “plug,” which is a simple specification of the output produced by the service. If the plug can be “played” on the database then the web service is generated. Our plug-and-play approach has three advantages. First, a plug is portable. You can take the plug to any data source and generate a web service. Second, a plug-and-play service is more reliable. The web service generation checks the database to determine if the service can be safely and correctly generated. Third, plug-and-play web services are easier to code for complex data since a service designer can write a simple plug, abstracting away the data’s real complexity. We describe how to build a system for plug-and-play web services, and experimentally evaluate the system. The software produced by this research will make life easier for web service designers.
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Buttler, David John. "Building blocks for composable web services". Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180046/unrestricted/buttler%5Fdavid%5F200312%5Fphd.pdf.
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