We present in this paper our experience in providing a wireless access interface to a distributed content search and delivery system. Important Wireless Application Protocol(WAP) gateway functions, in particular the Push function, are integrated into the access points of the system. Wireless devices can use this interface to search for distributed information and get notified of relevant new co...

Collaboration is crucial to Wireless Sensor Networks (WSNs) as a result of the typical resource limitations of wireless sensor nodes. In this paper, we present a model of collaborative work for WSNs. This model is called Wireless Sensor Networks Supported Cooperative Work (WSNSCW) and was created for these specific networks. We also present the formalization of some entities of the model and it...

Energy is a scarce resource in wireless field bus systems. Strategies for power saving while coping with the application task are needed. This paper introduces the sendOnDelta-principle known from wired field bus systems. In the context of wireless sensor networks the method is analyzed and conclusions for power saving reserves are drawn.

An Integrated Framework for Wireless Sensor Network

Recently, wireless sensor networks have been widely discussed in many applications. In this paper, we propose a novel 3D emergency service that aims to guide people to safe places when emergencies happen. At normal time, the network is responsible for monitoring the environment. When emergency events are detected, the network can adaptively modify its topology to ensure transportation reliabili...

We investigate two properties and their connection to the property of pseudoradiality in the context of compact spaces. The first is the WAP property introduced by P. Simon and the second is the א0-pseudoradial property introduced by B. Šapirovskii. We show that ♦ implies there is a compact space which is pseudoradial but not WAP. We show that there is a model in which CH fails and in which all...

FP6 IST research project Ubiquitous Sensing and Security in the European Homeland (UbiSeq&Sens) aims at providing a comprehensive architecture for medium and large scale Wireless Sensor Networks (WSN)s, with the full level of security and reliability required to make them trusted and secure for all applications, while considering early-warning and tracking in a Homeland Security/Defense context...

This paper provides a survey on implementing wireless sensor network (WSN) technology on industrial process monitoring and control. First, the existing industrial applications are explored, following with a review of the advantages of adopting WSN technology for industrial control. Then, challenging factors influencing the design and acceptance of WSNs in the process control world are outlined,...