Qianhui Althea Liang

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This paper presents a formalization of the Web Service composition problem as a search problem in an AND/OR graph, and a search algorithm for searching the graph to identify composite service(s) that satisfies a Web Service request. Given a service request that only can be satisfied by a composition of Web Services, we identify the service categories that(More)
— The key barrier to widespread uptake of cloud computing is the lack of trust in clouds by potential customers. While preventive controls for security and privacy are actively researched, there is still little focus on detective controls related to cloud accountability and auditability. The complexity resulting from large-scale virtualization and data(More)
—Making software systems service-oriented is becoming the practice, and an increasingly large number of service systems play important roles in today's business and industry. Currently, not enough attention has been paid to the issue of optimization of service systems. In this paper, we argue that the key elements to be considered in optimizing service(More)
With the popularity of the Web services technology, more and more software systems' functionalities become available by being published and registered as Web services. Registered Web services need to be dynamically combined to form " composite services " when individual " simple services " fail to meet service requestors' complex service needs. In this(More)