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A Query Rewriting Approach for Web Service Composition
"... Abstract—Data-Providing (DP) services allow query-like access to organizations ’ data via web services. The invocation of a DP service results in the execution of a query over data sources. In most cases, users ’ queries require the composition of several services. In this paper, we propose a novel ..."
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Abstract—Data-Providing (DP) services allow query-like access to organizations ’ data via web services. The invocation of a DP service results in the execution of a query over data sources. In most cases, users ’ queries require the composition of several services. In this paper, we propose a novel approach for querying and automatically composing DP services. The proposed approach largely draws from the experiences and lessons learned in the areas of service composition, ontology, and answering queries over views. First, we introduce a model for the description of DP services and specification of service-oriented queries. We model DP services as RDF views over a mediated (domain) ontology. Each RDF view contains concepts and relations from the mediated ontology to capture the semantic relationships between input and output parameters. Second, we propose query rewriting algorithms for processing queries over DP services. The query mediator automatically transforms a user’s query (during the query rewriting stage) into a composition of DP services. Finally, we describe an implementation and provide a performance evaluation of the proposed approach. Index Terms—Services integration framework, advanced services invocation framework, services delivery platform, composite web services. Ç 1
Improving Data Quality for Web Services Composition
- in Proceedings of the 7th International Workshop on Quality in Databases (QDB 2009), co-located with the 35th International Conference on Very Large Data Bases (VLDB 2009
"... Keywords: Web service, data quality, data interpretation, semantics, context The Internet era has evolved from a Web of documents to a Web of services. Web services are intended to be application components that can be reused and integrated to create more advanced, innovative Web applications withou ..."
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Keywords: Web service, data quality, data interpretation, semantics, context The Internet era has evolved from a Web of documents to a Web of services. Web services are intended to be application components that can be reused and integrated to create more advanced, innovative Web applications without needing to develop them from scratch. Unfortunately, Web services distributed on the Internet are usually independently developed by different organizations and/or individuals and have diverse assumptions about the interpretation of the exchanged data, such as inconsistent data representation and conceptualization. Such data misinterpretation can result in Data Quality (DQ) problems and hamper the potential of Web services. We identify important DQ challenges in Web services composition and present a classification of the resulting DQ problems. We suggest a novel reconciliation framework for addressing these problems and evaluate the framework in terms of scalability, adaptability, and extensibility. Finally, we identify important future directions in data quality and Web services. 1.
Reconciling Semantic Heterogeneity in Web Services Composition Thirtieth International Conference on Information Systems, Phoenix 2009 17
- in Proceedings of 4th International Conference on Web Services (ICWS 2006
, 2006
"... explicit permission, provided that full credit including © notice is given to the source. This paper also can be downloaded without charge from the ..."
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explicit permission, provided that full credit including © notice is given to the source. This paper also can be downloaded without charge from the
Facilitating Bioinformatics Research with Mobile Cloud
- In proc. International Conference on Cloud Computing, GRIDs, and Virtualization
"... Abstract—In this paper, we propose a concept of mobile-cloud by combining mobile and cloud together in a bioinformatic research application scenario. A mobile-cloud framework is developed, which facilitates the use of mobile devices to manipulate and interact with the scientific workflows running in ..."
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Abstract—In this paper, we propose a concept of mobile-cloud by combining mobile and cloud together in a bioinformatic research application scenario. A mobile-cloud framework is developed, which facilitates the use of mobile devices to manipulate and interact with the scientific workflows running in the Cloud. In this framework, an independent trusted accountability service is used to provide data provenance and enforce compliance among the participants of a bioinformatic workflow. We have implemented a prototype which allows the bioinformatic workflow design and participation using mobile devices. We prove the concept of mobile-cloud with the prototype and conducted performance evaluation for the significant points of the bioinformatic workflow. Keywords-cloud computing; accountability; service orieanted architecture; mobile cloud. I.
On service community learning: A co-clustering approach
- in Proceedings of ICWS-2010, 8th IEEE International Conference on Web Services, 2010
"... Abstract—Efficient and accurate discovery of user desired Web services is a key component for achieving the full potential of service computing. However, service discovery is a non-trivial task considering the large and fast growing service space. Meanwhile, Web services are typically autonomous and ..."
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Abstract—Efficient and accurate discovery of user desired Web services is a key component for achieving the full potential of service computing. However, service discovery is a non-trivial task considering the large and fast growing service space. Meanwhile, Web services are typically autonomous and a priori unknown. This further complicates the service discovery problem. We pro-pose a service community learning algorithm that can generate homogeneous communities from the heterogeneous service space. This can greatly facilitate the service discovery process as the users only need to search within their desired service commu-nities. A key ingredient of the community learning algorithm is a co-clustering scheme that leverages the duality relationship between services and operations. Experimental results on both synthetic and real Web services demonstrate the effectiveness of the proposed service community learning algorithm. I.
Service Variability Patterns
"... Abstract. Service-oriented computing (SOC) increases flexibility of IT systems and helps enterprises to meet their changing needs. Different methods address changing requirements in service-oriented environment. Many solutions exist to address variability, however, each solution is tailored to a spe ..."
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Abstract. Service-oriented computing (SOC) increases flexibility of IT systems and helps enterprises to meet their changing needs. Different methods address changing requirements in service-oriented environment. Many solutions exist to address variability, however, each solution is tailored to a specific problem, e.g. at one specific layer in SOC. We survey variability mechanisms from literature and summarize solutions, consequences, and possible combinations in a pattern catalogue. Based on the pattern catalogue, we compare different variability patterns and their combinations. Our catalogue helps to choose an appropriate technique for the variability problem at hand and illustrates its consequences in SOC. 1
Upadhyay Assistant Professor M
- Tech (IIT, Delhi) Power Electronics & Drives, Automation & Control Power
"... Abstract — A Hadoop ecosystem based Web Service Management System (HWSMS) mainly focuses on selecting the optimal web service using the two algorithms Optimal Web Service Selection (OWSS) and Advanced Stop Words Based Query Search (ASWQS). The distributed management framework is the key research iss ..."
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Abstract — A Hadoop ecosystem based Web Service Management System (HWSMS) mainly focuses on selecting the optimal web service using the two algorithms Optimal Web Service Selection (OWSS) and Advanced Stop Words Based Query Search (ASWQS). The distributed management framework is the key research issue that still needs to be addressed in service management research field. As the part of this effort, this paper focuses on the study on web services and discusses on the Hadoop Web Service Management System (HWSMS) which manages web services using the big data problem resolver tool, Hadoop Ecosystem. Due to the growing popularity of Service Oriented Architecture (SOA) and the web technology, there has been an huge impact on the web service repository. The data on the network has been increasing in the daily basis, hence making it huge and complex. This causes a gradual decrease in the performance and does not fulfill the user requirement and also QoS metric. Hence, In the proposed method, web service management using Hadoop ecosystem has been discussed. The user query is processed using the Map Reduce Optimal Web Service Search (OWSS) algorithm and the optimal web service out of several web services is delivered to the service requestor by filtering the unnecessary web services. Hence, an efficient web service selection process can be carried out and better QoS to the customer. The
1 TQoS: Transactional and QoS-aware selection
"... algorithm for automatic Web service composition ..."
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This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS 1 Gated Decap: Gate Leakage Control of On-Chi
"... Abstract—To minimize the leakage power dissipation of present-day on-chip Decaps, we propose a gated decoupling capacitor (GDecap) technique that deactivates a Decap when it is not needed. The application of the proposed GDecap technique on an eight-way clock-gated clustered pipeline showed that on ..."
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Abstract—To minimize the leakage power dissipation of present-day on-chip Decaps, we propose a gated decoupling capacitor (GDecap) technique that deactivates a Decap when it is not needed. The application of the proposed GDecap technique on an eight-way clock-gated clustered pipeline showed that on average, 41.7 % Decap leakage power was reduced, with negligible ( 0 037%) worst-case performance degradation, at the 70-nm technology node. GDecap design incurred an area overhead of around 5.36 % when compared with a conventional Decap design. Index Terms—Capacitance, low-power design, VLSI. I.
