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Localization in Wireless Sensor Networks has become a significant research challenge, attracting many researchers in the past decade. This paper provides a review of basic techniques and the state-of-the-art approaches for wireless sensors localization. The challenges and future research opportunities are discussed in relation to the design of the collaborative workspaces based on cooperative wireless sensor networks.

The current Web services technologies have not exploited sufficient semantics and approaches to dynamic service-oriented operations in open environments. This paper argues that such operations can be realized through agent-oriented interaction approaches. The key challenge is to develop an integration framework for the two paradigms, agent-and service-oriented, in a way that capitalizes on their individual strengths. This paper proposes the notion of agent-based Web services (AWS). We address several critical issues, including the appropriate architectural framework and the structure of its main elements (agent-based Web services), their meta-model, supporting technologies, integration method, and implementation approach. An integrated development environment for this framework called SOAStudio has been developed and tested by implementing a case study of a reverse auction e-marketplace.

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