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Object tracking is an important application of Wireless Sensor Networks (WSNs). One of the main challenges for designing an object tracking technique is energy conservation. Prediction based strategies are used to save energy. We consider an application where a WSN is installed in a forest for tracking the movement of animals (objects). Since, animals move in certain paths rather moving entirely randomly,...
Reliability of a power distribution system is defined as the ability to deliver uninterrupted service to customer. Distribution system reliability indices can be presented in many ways to reflect the reliability of individual customers, feeders and system oriented indices related to substation. Two approaches to reliability evaluation of distribution systems are normally used; namely, historical assessment...
Vehicular Delay Tolerant Network (VDTN) has emerged as a special type of network that is distinguished by the non-existence of end-to-end path between source nodes and destination nodes. Routing is one of the crucial issues in VDTN. To route a message, it must be scheduled from the outgoing buffer of a node. This is also an important issue considering the fact that the routing algorithm routes this...
A vehicular delay tolerant network (VDTN) is a special type of delay tolerant network (DTN), in which vehicles act as mobile nodes that are carriers of the message. It is characterized by the absence of an end-to-end connectivity between the nodes residing at the extreme ends. The routing in VDTN is critical as nodes are not connected permanently and the goal is to complete the message delivery successfully...
There are two major requirements for any surveillance application of Wireless Sensor Networks (WSN) — coverage and connectivity. In the design of any algorithm for WSN, the major constraint is limited battery life time of the sensor nodes. Most of the existing work on combined problem of coverage and connectivity either require the clocks of the nodes to be synchronized or require exact location information...
In modern power system power electronics drives in which 6 pulse and 12 pulse uncontrolled converters are provided for high power application. The scheme concede the distortion of the current waveforms caused by 6 pulse and 12 pulse uncontrolled converter under balanced and unbalanced input line condition. This paper endeavors to present a new technique based on wavelet transform for detection of...
Analysts of different fields have shown a good interest in data mining. Data mining is the process of inferring useful patterns from the huge amount of data. Regarding data storage and management process, classical statistical models are however protective. Big data is a popular terminology which is intermittently discussed in the present day, used to describe the enormous quantity of data that may...
Arrhythmia is an abnormal rhythm of heart. Correct detection or interpretation is much more important. In this paper, we aim at detecting 5 types of ECG beats: (1) Normal beat (2) Right Bundle Branch Block, (3) Left Bundle Branch Block, (4) Premature Ventricular Contraction (5) Paced beat. We compared the performances of two different classifier using DWT feature extraction technique. The DWT technique...
This paper presents H-bridge converter which is bridgeless boost converter with sinusoidal pulse width modulation to improve the quality of utility mains ac supply. Due to nonlinear loads and common mode voltage harmonics are produced on the supply side which can be reduced using sinusoidal pulse width modulation technique for H-bridge converter. To reduce the common mode noise currents the grounds...
Researchers have made efforts to achieve age classification using spatial and transform domain techniques with various classifiers. Spatial Domain techniques are based on human perception and susceptible to noise and image processing operations. Transform domain techniques provide high flexibility and robustness in selection of features and better classification efficiency. This paper uses transform...
Low-frequency, wide-field radio telescopes such as the Murchison Widefield Array (MWA) enable the dense spatial sampling of the ionosphere and plasmasphere on regional scales. For a physically compact array such as the MWA, the refractive shifts in the positions of celestial sources in the synthesised radio images are proportional to spatial gradients in the total electron content (TEC) transverse...
A vehicular delay tolerant network (VDTN) is a special type of delay tolerant network (DTN), where messages are carried by vehicles from one end to another end. End-to-end connectivity in a VDTN is episodic because an end-to-end path between different source nodes and destination nodes does not exist and therefore the possibility of delivering messages to the destination node reduces drastically....
Standardized vehicular On-Board Diagnostics (OBD) systems offer access to information commonly used for fault notification and reactive diagnostic services. Recently, there have been efforts to use OBD data to diagnose and predict faults prior to catastrophic failure events. Engine oil service life, a parameter directly related to engine longevity, is difficult to measure conventionally. We show that...
Data communication between the devices with different mechanisms for connection is impossible. Two devices, one having USB port but do not have Wi-Fi connectivity and another device having Wi-Fi connectivity but having no USB port or the two devices having only USB ports cannot communicate with each other as they cannot be connected directly. The main focus of the work is to transfer data from USB...
Existing data structures which facilitate storage and retrieval of geographical data are R-trees, R* trees, KD trees etc. Most widely used and accepted structure among these is the R-tree. A drawback with R-trees is that it represents regions as fictitious rectangles which do not correspond to actual geographical regions. Also R-trees do not represent the hierarchy very well. For example New York...
High time resolution applications of radio astronomy including pulsars and fast radio bursts are proving to be incredibly scientifically rewarding in terms of the depth and breadth of new physics and astrophysics they unveil. While the use of large single-dish type instruments has been dominating the field over the past decades, with the emergence of several next-generation radio facilities including...
The Sun has remained a difficult source to image for radio telescopes, especially at the low radio frequencies. Its morphologically complex emission features span a large range of angular scales and the emission mechanisms involved, span a wide range in brightness temperatures. In addition, time and frequency synthesis, the key tool used by most radio interferometers to build up information about...
The Murchison Widefield Array (MWA) is a new low frequency interferometric radio telescope, operating in the remote Murchison Radio Observatory in Western Australia. In this paper we present the first MWA observations of the well known radio relics in Abell 3667 (A3667) between 120 and 226 MHz. We clearly detect the radio relics in A3667 and present flux estimates and spectral indices for these features...
An efficient moving object completion algorithm suitable for real-time content-based multimedia application system is proposed in this paper. In the proposed method, 3D volume of video is sampled into 2D spatio-temporal slices. Background subtraction technique is used for object detection and tracking. Then, exampler-based image inpainting is applied to complete partially damaged object trajectories...
This paper presents the study results of soil resistivity measurement and design of grounding system involved for a hydroelectric generating station located on a hilly terrain which were carried out by CPRI. This paper focuses on Soil resistivity measurement for different seasons in a year such that the worst value to be considered for the design calculation. The effectiveness of temperature on soil...
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