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Following the Service-Oriented Architecture, Cloud services are exposed as Web APIs (Application Program Interface), which serve as the contracts between the service providers and service consumers. With increasing massive and broad applications of Cloud-based development, a large number of diversified APIs are emerging. Due to their wide impacts, any flaw in the cloud APIs may lead to serious consequences...
This paper reports an organized suite of experiments comparing a parallel matrix program in performance and reliability using a single-sided statistic multiplexed computing framework against MPI based on end-to-end computing framework.
In this paper, we present our prototype system which supports coding of mapping-enhanced SPARQLoid queries for users by providing recommendation mechanisms for both vocabularies and endpoints. Our prototype system aims for reducing the cost for eliciting appropriate ontology mappings and the mapped vocabularies. Furthermore, to make the recommendation of vocabularies and endpoints be widely covered,...
This paper establishes a speaker-independent pronunciation recognition and assessment system with 673 words for mandarin Chinese under the background of a Chinese learning system framework. The recognition part is based on HTK using HMM (Hidden Markov Models) and improved in the aspect of acoustic model. Making use of the recognition results and the log-likelihood obtained from the Viterbi coding,...
This paper describes a benchmarking workload model for business process execution language (BPEL) engines for Web services. The proposed model is based on simulation of real world traffic conditions by defining a set of requirements which best characterize the end-users. The performance characteristics are evaluated on top of collected measurements such as success/fail rate, response times or round-trip...
Systems verification requires first to model the system to be verified, then to formalize the properties to be satisfied, and finally to describe the behaviour of the environment. This last point, known as the proof context, is often neglected. It could, however, be of great importance in order to reduce the complexity of the proof. The question is then how to formalize such a proof context. This...
The UNICORE grid system provides a seamless, secure and intuitive access to distributed grid resources. In recent years, UNICORE 5 is used as a well-tested grid middleware system in production grids (e.g. DEISA, D-Grid) and at many supercomputer centers world-wide. Beyond this production usage, UNICORE serves as a solid basis in many European and International research projects and business scenarios...
This is an introduction to the proceedings of the MWS 2007 workshop held at EDOC 2007. It first explains the motivation for and background of the workshop. Then, it contains a short description of the keynote, each long and short peer-reviewed paper, and the discussion session "impact of various execution environments on middleware for web services". After the closing statements, MWS 2007...
Many Web services are expected to run with high degree of security and dependability. To achieve this goal, it is essential to use a Web-services compatible framework that tolerates not only crash faults, but Byzantine faults as well, due to the untrusted communication environment in which the Web services operate. In this paper, we describe the design and implementation of such a framework, called...
In order to accomplish high performance on grid workflow, grid resource management system needs a smart and swift resource allocation middleware. In this paper, we study the economy driven resource allocation problem based on market model of grid resource management architectures. We model the problem as the multiple choice knapsack problem (MCKP) and design the resource allocation optimization algorithm...
We developed a quality of service (QoS) management system to support service level management (SLM) for global enterprise services. The QoS management system is integrated with one of our enterprise services in a preproduction system, an identical system as the production system but in a test environment. Lab experiments showed that our integrated solution helps global enterprise services to better...
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