DYNAMICS OF AN UMBILICAL CABLE FOR UNDERGROUND BORE-WELL APPLICATIONS

A general model for an umbilical cable for underground bore-well applications is considered. The response of one-degree-of-freedom, nonlinear system under external excitation forces and the effect of the parameters 2, β and f on the excited system are investigated. Variation of the parameter 2 leads to multi-valued amplitudes and hence to jump phenomena. The simulation results are achieved using MATLAB 7.12.0 (R2011a) Simulink

Novel framework of retaining maximum data quality and energy efficiency in reconfigurable wireless sensor network

There are various unseen and unpredictable networking states in Wireless Sensor Network (WSN) that adversely affect the aggregated data quality. After reviewing the existing approaches of data quality in WSN, it was found that the solutions are quite symptomatic and they are applicable only in a static environment; however their successful applicability on dynamic and upcoming reconfigurable network is still a big question. Moreover, data quality directly affects energy conservation among the nodes. Therefore, the proposed system introduces a simple and novel framework that jointly addresses the data quality and energy efficiency using probability-based design approach. Using a simplified analytical methodology, the proposed system offers solution in the form of selection transmission of an aggergated data on the basis of message priority in order to offer higher data utilization factor. The study outcome shows proposed system offers a good balance between data quality and energy efficiency in contrast to existing system

Performance Analysis of Gray Code based Structured Regular Column-Weight Two LDPC Codes

Abstract: The Low-Density Parity-Check (LDPC) code is a linear block code specified by a parity-check matrix H. The construction process of LDPC codes considers the parameters such as row weight, column weight, density of H-matrix, code rate, code length and girth. A novel flexible method for constructing structured regular LDPC codes considering all these parameters, using Gray-code representations, was reported in our earlier work. LDPC codes with column-weight two have low computational complexity and are promising for data storage and partial response channels. This paper presents the performance analysis of column-weight two LDPC codes constructed using the method proposed in our previous work. The BER performance of the obtained codes is comparable to that of the standard Gallager"s random codes and QC-LDPC codes

Fuzzy Logic based Efficient Multipath Routing for Mobile Adhoc Networks

The reliable data delivery is the main problem of Mobile Ad-Hoc Networks (MANET). Due to node mobility, heavy packet dropping occurs, which leads to packet overhead and links break. The previous routing protocols are vulnerable to node mobility especially for large-scale networks. Due to this issue ,an Efficient Multipath Routing Protocol (EMRP) using fuzzy logic controller is proposed which takes advantage of the stateless property of geographic routing and the broadcast nature of wireless medium. In this protocol, both stability and mobility are calculated to determine network reliability. The reliable multipath is constructed based on network topology. Both link and node reliability is determined to enable novel routing based on calculation of stability. Fuzzy logic control procedure is implemented with reliability to increase the network performance. This system is used in ad hoc network to determine its reliability. The proposed protocol is simulated with Network Simulator (NS2.34) tool to attain better stability and network reliability and also improves the network life time compared to Existing protocols EMLARP

Study of RF Signal Attenuation of Human Heart

A study of ultrawideband pulse propagation modeling through human body for all frequencies from 0.1 to 10.5 GHz is presented. Reflection coefficient and signal attenuation are computed from the model considering the variation of heart dimension with respect to time unlike a fixed dimension of heart used in earlier models. The performance of cardiac activity is studied from the change of signal attenuation. This estimation may help in the design of a noninvasive diagnostic system using ultrawideband of frequencies

Dermatoglyphic analysis in parents with cleft children: A comparative study

Background and Objective: There were studies in the literature which showed the altered dermatoglyphics in the cleft children. But it would be beneficial if probable expression can be proved in prior generations, so that genetic counseling and other preventive measures can be undertaken. The aim of the study is to determine variations in dermatoglyphics of prior generations which would serve as bench markers to predict the occurrence of cleft in off springs. Materials and Methods: A total of 400 parents aged between 25-45 years were selected and divided into two groups - Group A consisted of parents with cleft children and Group B comprised of parents with at least 2 healthy children who met the inclusion criteria. Dermatoglyphic prints were collected by ink method and evaluated for pattern types, total ridge count and palm prints were evaluated for a-b ridge count, atd angle and asymmetry. Results: Significant difference was observed between Group A and B with reference to pattern types; TRC and a-b ridge count and atd angle. Absence of t point was variably noticed in the mothers of affected children. Conclusion: Dermatoglyphics can be used as tool to study the developmental instability of cleft anomalies and provides data to assess the genetic etiology of clefting