Shang-Pin Ma

A Survey on Automated Service Composition Methods and Related Techniques

As a promising, low-cost, and agile way to develop software, in recent years automatic service composition has been a popular research topic receiving a lot of attentions. For this topic, upon our long-term study and paper reviewed, we present technical survey and observation in this paper, including indispensable background and preliminary knowledge. The survey assumes under traditional composition context. Moreover, following the survey and observation, we suggest two approach patterns and point out possible future challenge as well as direction, especially to the influence of the mature of mobile devices and environment.

REST2SOAP: A framework to integrate SOAP services and RESTful services

Nowadays, the mainstream of Web 2.0 website services is in the REST style called RESTful web service. RESTful services have been widely accepted by the public because of the usability and simplicity. Meanwhile, web service technologies realize service-oriented architecture (SOA) successfully and are exploited in both industry and academia. Notably, service composition that can aggregate existing services into a new one delivers the most benefits of SOA through BPEL standard. However, BPEL cannot support RESTful services and integrate both Web 2.0 and SOA-based resources in a composite service directly. It means that it is costly or time-consuming to utilize RESTful services in an SOA-based application. Therefore, this paper presents a framework, namely REST2SOAP, to integrate SOAP services and RESTful services. REST2SOAP leverages WADL specification, and can wrap RESTful services into SOAP services semi-automatically. Using REST2SOAP, developers can create a BPEL service that combines SOAP, RESTful services and user interfaces simultaneously.

Towards a Genetic Algorithm Approach to Automating Workflow Composition for Web Services with Transactional and QoS-Awareness

Service-oriented architecture implemented by Web Services is one of the most popular and promising software development paradigm that has brought some challenging research issues today. One of the most important issues is how to automate web service composition at design phase. Currently, there are many researchers concentrating on service composition problem that can be partitioned into three parts, dynamic workflow composition, QoS-aware, and transaction-aware service selection. This paper addresses the issue of automatic composing Web Services into an executable workflow not only according to user¡¦s functional requirements but also to their transactional properties and QoS characteristics. We propose an automatic composition approach through genetic algorithm to satisfy user¡¦s functional requirements, QoS criteria, and transactional requirements automatically at the same time. Experimental results are presented.

Genetic algorithm for QoS-aware dynamic web services composition

Nowadays, the Service-Oriented Architecture (SOA) as well as orchestration technology becomes trend of software development. The benefit of SOA is that we will save cost and time extremely due to the services utilized are already exist and reuse those services as well as integrate them. Currently, the main issues of SOA are how to define workflow as well as how to select the suitable services to perform this workflow with QoS. Many approaches separate workflow defined and services with QoS selected, therefore, will sacrifice the users feasibility. In this paper, we provide an approach to deal with the dynamic service composition issue based on the genetic algorithm and cases-based reasoning. This approach can support the flexible service workflow according to the users requirements and compose the workable services to complete this workflow.

Integrating Service Composition Flow with User Interactions

Web service technologies are best exploited by composing services, and BPEL (Web Services Business Process Execution Language) is adopted industrial-wide as the defacto service composition standard. However, BPEL is applied mainly in the design of composite services and fully automated processes, and user interaction, that should be included in service delivery, but presently is not included in the BPEL standard. To integrate the composite service flow with user interactions, in this work we propose a framework to extend BPEL to new activities that describe user involvement and user interfaces. An enhanced BPEL engine with a UI rendering engine was accordingly developed.

Dynamic Service Composition Using Core Service Identification

Service selection and binding for building composite services is a critical but difficult to resolve issue in the domain of service-oriented computing. This paper proposes an innovative approach to address this issue, in which every abstract component service in the composition is assigned a weight value to represent its importance according to designer scoring and basis path analysis, thereby generating a weighted service flow. Composite services, including the selected concrete component services, are produced according to the weighted service flow and genetic algorithms. The generated composite service ensures acceptable quality level and guarantees that the core component services, which are most likely to influence the overall service flow, are more robust than the others. Besides, a novel fault handling method based on the identified core services is proposed to enhance the availability of composite services. Experimental results demonstrate that the proposed approach can effectively maintain the quality of core component services.

Robust Little Flame Detection on Real-Time Video Surveillance System

This study proposed a method to detect the little flame in the early stage of fire combustion. The foreground object was extracted by motion detection and YCb Cr color clues. To avoid the noise of motion detection in different resolution videos, background edge model is used to eliminate noise instead of morphology. Next, with the help of fire characteristics, the foreground object is identified. A fire object is determined by compactness, corner flicker rate, and growth rate. The experiment can be applied to any resolution video and complex scene, both indoors and outdoors, such as squares, where people walk around and vehicles pass by. The outcome of experiment, using this proposed method, can detect the fire object accurately and exclude the undangerous fire.

Integrating process and work breakdown structure with design structure matrix

∗Department of Computer Science and Information Engineering, National Central University, Jhongli, Taiwan E-mail: {yjlee, jass, wtlee, jielee}@selab.csie.ncu.edu.tw ∗∗Department of Computer and Information Science, National Taichung University, Taichung, Taiwan E-mail: glenn@mail.ntcu.edu.tw ∗∗∗Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan E-mail: albert@mail.ntou.edu.tw

University Timetabling through Conceptual Modeling

A number of approaches have been proposed in tackling the timetabling problem, such as operational research, human‐machine interaction, constraint programming, expert systems, and neural networks. However, there are still several key challenges to be addressed: easily reformulated to support changes, a generalized framework to handle various timetabling problems, and ability to incorporate knowledge in the timetabling system. In this article, we propose an automatic software engineering approach, called task‐based conceptual graphs, to addressing the challenges in the timetabling problem. Task‐based conceptual graphs provide the automation of software development processes including specification, verification, and automatic programming. Maintenance can be directly performed on the specifications rather than on the source code; moreover, hard and soft constraints can be easily inserted or removed. A university timetabling system in the Department of Computer Science and Information Engineering at National Central University is used as an illustrative example for the proposed approach.

A possibilistic Petri-Nets-based service discovery

The focus of this paper is to propose a service-oriented multi-agent framework to better integrate Web services and agents. In the making of this framework, there are four main components: (1) a possibilistic Petri-Nets (PPN) based service matchmaking mechanism for service discovery, (2) a service description language based on PPN for describing agent services and Web services, (3) a set of ontologies to facilitate the semantic matchmaking, and (4) an extension of tModels to bridge the Web services registered in UDDI to the PPN matchmaker.