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In the last few years Ambient Assisted Living (AAL) has come up a long way with numerous innovative ideas to cater to the growing elderly population of the society. With a perfect combination of tools and technology leading to ubiquitous or pervasive computing, data can be sensed, and transmitted from patients at home to healthcare professionals for quick monitoring and taking necessary actions, if...
The underwater acoustic channel has unique features such as low bandwidth, high propagation delay, high channel error rates, multipath fading and so on and also sensor nodes are constrained of the resources such as limited power, limited memory space and processing speed. In this paper, we are concerned with efficient utilization of these resources by applying data aggregation technique on the sensor...
Wireless Sensor Networks are an emerging technology with wide potential to be used in many applications. One such application is the detection and prevention of disasters in scenarios such as forest fires, floods and earthquakes. In these disaster situations, the events being monitored have the potential to destroy the sensing devices, for example, they can be burnt in a fire, sunk in a flood, melted...
A Wireless Sensor Network (WSN) comprises of a number of sensor nodes which help to monitor physical conditions such as temperature, sound, pressure, motion, etc. These Sensor Networks are increasingly being used in applications that are hazardous to human health or require much manual labour. One such application is that of monitoring the temperature of a large number of compost heaps spread over...
In the last years the number of papers related to wireless sensor networks has increased substantially. Most of them focus in raising issues as routing algorithms, network lifetime, and more recently, Multiple Input Multiple Output wireless networks. In contrast with all those studies, we present a practical application of wireless networks: The sensing of the pH and temperature for a fish farm. The...
Environmental monitoring is one of the most popular applications in wireless sensor networks. Although it is important to obtain a continuous record of the environment, users may gain enough information without receiving every routine sensor measurement. Reducing unnecessary traffic allows better utilization of the network resources. However, it is uneasy to decide on when and what kind of traffic...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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