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On a crowdsourcing platform, in order to cheat for rewards or sabotage the crowdsourcing processes, spam workers submit numerous random and erroneous answers to the tasks published by honest requesters. This type of behaviours extremely reduces the enthusiasm of honest users, which may lead a crowdsourcing platform to a failure. To defend the threats from spam workers, reputation-based defense mechanisms...
With the development of web service technology, identifying and discovering the users with similar preferences have an important significance to service selection and service optimization in the service environment. In order to divide the users into groups based on their preference similarity in the process of service selection, a combination-based clustering algorithm, named AAK, is presented in...
With the advent of service-oriented computing, the issue of trust and Quality of Service (QoS) have become increasingly important. In service-oriented environments, when there are a few service providers providing the same service, a service client would be keen to know the trustworthiness of each service provider in the forthcoming transaction. The trust rating of a delivered service from a service...
Enabled by Service-Oriented Architecture (SOA), recently Software as a Service (SaaS) and Cloud computing are gaining momentum in the industry. An open issue is how to ensure accountability in business services offered through Internet. Traditionally a contract is an effective legal means to uphold accountability in business transactions. In this paper, we propose a novel service contract model called...
Since Representational State Transfer (REST) architecture was proposed by Fielding in early 1990s for distributed hypermedia systems, it has become a popular architectural style of choice in various computing environments. However, REST was not originally designed to support enterprise requirements, in particular the accountability requirements that are crucial for the business services offered through...
Recently, several global institutions have fallen victim to concerns regarding disclosure and accountability. The most poignant examples are the recent US Wall Street collapse due to the burgeoning effect of Collateralized Debt Obligations (CDO). The key concern for consumers of these services are transparency, disclosure, and trust of the product/services. These are elementary attributes of accountability...
In Serviced-Oriented Computing (SOC) environments, the trust level of a service or a service provider is a critical issue for a service client to consider, particularly when the client is looking for a service from a large set of services or service providers. However, a service may invoke other services offered by different providers forming composite services. The complex invocation relations significantly...
Crawling deep web is the process of collecting data from search interfaces by issuing queries. With wide availability of programmable interface encoded in Web services, deep web crawling has received a large variety of applications. One of the major challenges crawling deep web is the selection of the queries so that most of the data can be retrieved at a low cost. We propose a general method in this...
Accountability has become a key concern for management in recent years since the collapse of several large corporations in energy, communications and financial consulting industries. Traditionally, accountability has not been a significant concern in the IT literature. Recently, some protocols, models and frameworks that address certain aspects of accountability have emerged. However, an architecture...
Trust is a critical issue in e-commerce and e-service environments. In some applications (such as eBay), the trust management mechanisms have been introduced to provide valuable information to buyers prior to placing orders and making payments. Meanwhile, the trust issue is also actively studied in the research community. However, most studies and applications focus on approaches that result in a...
Web service has become an important issue that attracts the researchers from both computer science and communication fields. SOA (service-oriented architecture) based on Web service is no doubt a perfect software engineering thought. In order to overcome some defects in the existing spatial logistics system, A new design project of spatial logistics system based on SOA was proposed in this paper....
The growing number of Web services has greatly placed pressure on discovering Web services. It is a very desiderate to solve the problem how we can discover Web services accurately. The paper proposes a method based on service composition by describing Web services with OWLS. We firstly analyzed the process model of the service. Then, we make matchmaking and return the result to the requester. Compared...
Mobile agent technology and Web service technology compensate each other and play very important roles in e-service applications. The mechanism of Web services technology naturally provides a platform for deploying mobile agent technology. Therefore, the integration of the mobile agent technology and Web Service technology has been actively investigated in recent years. On the other hand, the security...
Web services specification provides an open standard for the distributed service oriented architecture. It is widely used in Internet and pervasive networks supporting wireless mobile devices. A mobile agent is a composition of computer software and data which is able to migrate from one host to another autonomously and continue its execution on the destination host. Mobile agent technology can reduce...
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