Tian Huat Tan

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Software that support various groups of customers usually require complicated configurations to attain different functionalities. To model the configuration options, feature model is proposed to capture the commonalities and competing variabilities of the product variants in software family or Software Product Line (SPL). A key challenge for deriving a new(More)
Service composition makes use of existing service-based applications as components to achieve a business goal. In time critical business environments, the response time of a service is crucial, which is also reflected as a clause in service level agreements (SLAs) between service providers and service users. To allow the composite service to fulfill the(More)
In recent years, many Web service composition languages have been proposed. Web service choreography describes collaboration protocols of cooperating Web service participants from a global view. Web service orchestration describes collaboration of the Web services in predefined patterns based on local decision about their interactions with one another at(More)
Web service composition is an emerging technique to develop Web applications by composing existing Web services. Web service composition is subject to two important classes of requirements, i.e., functional and non-functional requirements. Both are crucial to Web service composition. Therefore, it is desirable to verify combined functional and(More)
Service composition uses existing service-based applications as components to achieve a business goal. The composite service operates in a highly dynamic environment; hence, it can fail at any time due to the failure of component services. Service composition languages such as BPEL provide a compensation mechanism to rollback the error. But such a(More)
Web services have emerged as an important technology nowadays. There are two kinds of requirements that are crucial to web service composition, which are functional and non-functional requirements. Functional requirements focus on functionality of the composed service, e.g., given a booking service, an example of functional requirements is that a flight(More)
In component-based systems, a number of existing software components are combined in order to achieve business goals. Some of such goals may include system-level (global) timing requirements (GTR). It is essential to refine GTR into a set of component-level (local) timing requirements (LTRs) so that if a set of candidate components collectively meets them,(More)
Recently, many large enterprises (e.g., Netflix, Amazon) have decomposed their monolithic application into services, and composed them to fulfill their business functionalities. Many hosting services on the cloud, with different Quality of Service (QoS) (e.g., availability, cost), can be used to host the services. This is an example of competing services.(More)
Malicious JavaScript is one of the biggest threats in cyber security. Existing research and anti-virus products mainly focus on detection of JavaScript malware rather than classification. Usually, the detection will simply report the malware family name without elaborating details about attacks conducted by the malware. Worse yet, the reported family name(More)