Clustering is an important characteristic of most sensor applications. In this paper we define COSMOS, the Cluster-based, heterOgeneouS MOdel for Sensor networks. The model assumes a hierarchical network architecture comprising of a large number of low cost sensors with limited computation capability, and fewer number of powerful clusterheads, uniformly distributed in a two dimensional terrain....

Sensor networks have been an active research area in the past decade due to the variety of their applications. Many research studies have been conducted to solve the problems underlying the middleware services of sensor networks, such as self-deployment, self-localization, and synchronization. With the provided middleware services, sensor networks have grown into a mature technology to be used ...

Nowadays, the necessity of safeguarded environments is stronger than ever. The defence of public areas against terroristic threats requires intelligent security assistance systems that comprise state-of-the-art surveillance technology to localize persons with hazardous materials. The recent progress in the detection of hazardous materials by a new generation of chemical sensors leads to an incr...

Attitude determination is a requirement for most navigation and control problems. Classically, this problem has been solved by an Attitude Heading Reference System (AHRS) using gyroscopes that are updated by gravity sensors (pitch and roll) and magnetic field sensors (yaw) with low-pass filters to attenuate errors incurred during turns. Rate gyroscopes are prone to bias-and random-walk errors r...

This paper investigates the detection performance of randomly deployed wireless sensor networks. It addresses the problem of detecting mobile targets that have continuous movement. We categorise these targets into two classes. The first type is rational targets, which have the knowledge of existing sensors. The other type is on the contrary. These targets neither know anything about the sensors...

The emergence of wireless networked sensors constitutes a hot research topic in embedded system design. Although system resource is seriously limited, operating system applied in sensors has to implement complex task scheduling, which should support concurrent operations, real-time constraint, adaptability and reliability. In this paper, we present a reliable OS scheduling scheme for wireless n...

Recent research in industrial robotics aims at the involvement of additional sensoric devices to improve robustness, flexibility and performance of common robot applications. Many different sensors have been developed over the past years to fit the requirements of different but very specific tasks. Special seam tracking sensors support the robot in welding applications. Vision systems are commo...

Wireless sensors have several constraints, such as a short transmission range, poor processing capabilities, and a limited available energy. Our goal is to design an energyefficient sensor network by exploiting the concept of collaborative signal processing. We consider a network composed of multiple sensor nodes, each of which corresponds to a processor. By using an appropriate collaborative c...

In this paper we present an approach to increase the interest of pupils and high school students in modern science and technology. To achieve this, we developed a versatile experimentation platform for the use in schools and school projects, called VenDASys (Versatile Control and Data Acquisition System). VenDASys allows the interfacing of individual (micro-)sensors or complete experimental set...

Inspired from crickets and using MEMS techniques, single artificial flow sensors and hair sensor arrays have been implemented successfully in different groups [1][2]. This paper discusses the latest developments in interfacing and signal processing of cricket inspired artificial hair-sensors arrays. Sensor arrays require large number of connections for their elements to be interrogated individu...