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—Optimizing performance of wireless sensor networks leads to trade-offs between local computation and communication. With the usage of on-node processing, the lifetime of the sensor nodes can be extended as raw data does not need to be sent out and logged by an external device. In this paper we present our approach for on-node processing of ECG signals to(More)
—In this paper we present a complete approach to programming sensor networks 1. The main contribution concerns the separation of three abstraction levels, viz., application level, network level and node level, leaving more room for standardization than with current practices. In addition we propose to program the network from an overall perspective rather(More)
For people suffering from nocturnal epileptic seizures it is crucial to have a system that can detect such seizures in real-time. In this paper, we present a preclinical demonstrator for real-time detection of nocturnal seizures based on the heart rate. The system is built on the VITRUVIUS body sensor platform, which consists of a body hub (a smart phone)(More)
Body Sensor Networks (BSNs) are used for diverse applications ranging from monitoring for medical purposes, sport coaching to computer gaming. This leads to viewing the BSN as an application platform and requires the capability to dynamically extend and configure BSN applications, including reprogramming the sensor nodes of the BSN. We propose a trust(More)
Matsad is a structure editor designed to facilitate the writing of documents of a mathematical nature. The principal element of Matsad is a system for deening and using \stencils" which deene the visual and logical structure of notational elements in a document. This paper overviews the main features of the editor from a user's viewpoint. Particular(More)