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Many industrial applications rely on sensors and sensor networks residing on machinery, transport containers or in the environment. For distributed processes in such domains the sharing of those sensor networks is crucial. This paper introduces a peer-to-peer (P2P) architecture for sharing services provided by existing sensor networks with any Internet(More)
— Massively deployed wireless sensor and actuator networks (WSAN), co-existing with RFID technology, can bring clear benefits to large-scale enterprise systems, by delegating parts of the business functionality closer to the point of action. However, a major impediment in the integration process is represented by the variety of customized WSAN platforms and(More)
—Wireless Sensing and Radio Identification systems have undergone many innovations during the past years. This has led to short product lifetimes for both software and hardware compared to classical industries. However, especially industries dealing with long-term support of products, e.g. of industrial machinery, and product lifetime of 40+ years may(More)
— Wireless sensor networks are used to perform sensor measurements under a variety of conditions. In settings with sparse distribution of sensor nodes, multi-hop routing is traditionally used to forward information from a source node to a destination node. A problem with this approach is that loss of connectivity of nodes in the path between source and(More)
— This paper analyses the problem of time-synchronization of distributed sensor nodes. We present a Syncob, a method for synchronizing an arbitrary number of nodes in a distributed setting without the requirements of an infrastructure, master node or time and resource consuming protocol overhead. Syncob is therefore also very good suited for highly mobile(More)
Many Ubicomp appliances require the recognition of context. Existing context systems do not provide information about the quality of the context recognizied to the appliance at runtime. In this paper we propose the first context quality system which gives quantitave measures, the Context Quality Measure (CQM), in real time. The CQM can be used by(More)
Fuzzy inference has been proven a candidate technology for context recognition systems. In comparison to probability theory, its advantage is its more natural mapping of phenomena of the real world as context. This paper reports on our experience with building and using monolithic fuzzy-based systems (a TSK-FIS) to recognize real-world events and to(More)
This paper presents an experience report illustrating the design of the uPart tiny low-power sensor network platform: from the analysis phase over the definition of the application, design and construction of hardware, the implementation of the software and network to the application set-up. uPart sensor nodes were given away in the conference badge to 500(More)
This work presents a system that makes use of the Microsoft Kinect to enable Point&Click interaction for the control of appliances in smart environments. A backend server determines through collision detection which device the user is pointing at and sends the respective control interface to the user's smartphone. Any commands the user issues are then(More)
This paper presents the µPart wireless sensor system especially designed for settings requiring a high population of sensors. Those settings can be found in actual research of indoor activity recognition and ambient intelligence as well as outdoor environmental monitoring. µParts are very small sensor nodes (10x10mm), with wireless communication, enabling(More)