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Recent development in electronics and wireless communications has enabled the improvement of low-power and low cost wireless sensors networks. Wireless Sensor Networks(WSNs) are a combination of autonomous devices transmitting locally gathered information to a so-called sink node by using multihop wireless routing. One of the most important challenges in WSNs is to design energy efficient routing...
We evaluate the encapsulation and packaging reliability in fully integrated, fully wireless 100 channel Utah Slant Electrode Array (USEA)/integrated neural interface-recording version 5 (INI-R5) by monitoring the extended long term in-vitro functional stability and recording longevity. The INI encapsulated with 6-µm Parylene-C was immersed in phosphate buffer saline (PBS) for a period of over 12 months...
Authors in this paper use angle of arrival (AoA) information to localize a network of 100 nodes with one anchor only. The maximum communication range of a node in a wireless sensor network is known. Number of hops is dynamic, depending upon backward communication from node to be localized to the node already localized. The nodes within communication range from each other exploit noisy AoA information...
In this paper, we present a commercial sensor node platform called ScoutNode. It is based on a novel modular architecture that supports three very powerful functionalities - multimodal support with a maximum of twenty five sensors supported on a single node that includes multiple video cameras; a user- friendly API for application development, and interoperability with a variety of 802.x hardware...
The limited energy source of battery driven wireless sensor networks, combined with the need for operational lifetimes of months to years, necessitates that energy efficiency be treated as the most important factor while designing these wireless distributed sensing systems. In this paper, we compare the performance of narrowband communications to ultra-wideband communications in a simplistic wireless...
This work presents, the classification of user activities such as Rest, Walk and Run, on the basis of frequency component present in the acceleration data in a wireless sensor network environment. As the frequencies of the above mentioned activities differ slightly for different person, so it gives a more accurate result. The algorithm uses just one parameter i.e. the frequency of the body acceleration...
Traditional rate adaptation solutions for IEEE 802.11 wireless networks perform poorly in congested networks. Measurement studies show that congestion in a wireless network leads to the use of lower transmission data rates and thus reduces overall network throughput and capacity. The lack of techniques to reliably identify and characterize congestion in wireless networks has prevented development...
Various sensor network measurement studies have reported instances of transient faults in sensor readings. In this work, we seek to answer a simple question: How often are such faults observed in real deployments? To do this, we first explore and characterize three qualitatively different classes of fault detection methods. Rule-based methods leverage domain knowledge to develop heuristic rules for...
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