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The following topics are dealt with: power systems; drives; biomedical signal; processing; communication systems; communication networks; semiconductor devices and; modelling; MOSFET; power electronics; microwave links and antennae; RFID tag antenna; thin film technology; power converters; electrooptical devices; lasers; solar cells.
Since a superconducting magnetic energy storage (SMES) unit with a self-commutated converter is capable of controlling both the active and reactive power simultaneously and quickly, increasing attention has been focused recently on power system stabilization by SMES control. In this study, a fuzzy gain scheduled supplementary control scheme with SMES unit is proposed and applied to automatic generation...
A well designed hybrid energy system can be cost effective, has a high reliability and can improve the quality of life in remote rural areas. The economic constraints can be met, if these systems are fundamentally well designed, use appropriate technology and make use effective dispatch control techniques. The first part of this tri-series paper, presents the analysis and design of a mixed integer...
Computer simulation is an increasingly popular tool for determining the most suitable hybrid energy system type, design and control for an isolated community or a cluster of villages. This paper presents the development of the optimum control algorithm based on combined dispatch strategies, to achieve the optimal cost of battery incorporated hybrid energy system for electricity generation, during...
This paper presents the results of the application of model (developed in Part-I) and simulation algorithm (developed in Part-II) for determining the techno-economics of battery storage type hybrid energy system intended to supply the load demand of a rural remote area having a cluster of nine villages (grid isolated). The hour-by-hour simulation model is intended to simulate a typical one month period...
Details of control and instrumentation for on-grid and off-grid operation of a small induction generator based wind turbine are presented in this paper. A micro-controller based system controller is used to connect/disconnect the wind power generator to the grid, and also to maintain the grid connection. Several real time situations are considered during the operation of the wind power generation...
A nearby lightning strike can induce significant currents in long horizontal and tall down conductors. Although the magnitude of the current in this case is much smaller than that encountered during a direct strike, the probability of occurrence and the frequency content is higher. In view of this, appropriate knowledge of the characteristics of such induced currents is relevant for the interpretation...
Self-excited induction generators are increasingly being used in remote areas to generate electrical power from both conventional and nonconventional energy sources. This paper describes a method of evaluating the steady state characteristics of a single-phase as well as a three-phase induction generator for stand-alone operation. The steady state problem is formulated in a very general way so that...
The scope of this paper is to investigate the effects of lightning induced return stroke current parameters such as peak value, velocity of propagation and cloud height, and the distance of observation point from lightning strike point on the electrostatic, induction and radiation components of lightning generated vertical electric field in time domain. Modified dipole technique has been used in this...
Breast cancer is one of the leading causes of women death in the world. Since the causes are unknown, breast cancer cannot be prevented. Micro calcifications are the earliest signs of breast cancer and their detection is one of the most important research areas now. A novel approach for image segmentation of denser mammography images is introduced, for more accurate detection of microcalcifications...
In this paper a discrete cosine transform (DCT) based ECG signal compression method is proposed. DCT is applied on the residual beats of ECG signal obtained after subtracting the period normalized and dc removed beats from a reference beat. The quantization and the threshold vectors are optimized to minimize the entropy of the quantized coefficients for a target distortion. The quantized coefficients...
Biological tissues are multi-compartmental inhomogeneous media composed of different cellular and subcellular domains. Human head, a multi-compartmental inhomogeneous medium, is composed of scalp, skull, cerebrospinal fluid (CSF), gray matter (GM), white matter (WM), and other subcellular domains. Among these domains, skull and WM show the complicated anisotropy tissue property because of their physiological...
The digestive system is the one of the important system in the human body, which plays major role directly or indirectly for the function of human body. Most of the people around the world have the digestive system disorders due to improper digestion of food due to inefficient performance of stomach activity. The main objective of this paper is to propose a novel method of finding the digestive system...
Web data integration has been an active research topic for the last few years. Bioinformatics is a huge domain wealth of data. By reverse engineering web data, in this paper we report a Java based implementation of biologically relevant application of web data integration consisting of few sites such as Flybase, YMF and STAMP. We have developed a tool that can automate the finding of transcription...
Remote sensing and monitoring of cardiopulmonary activities based on direct conversion Doppler radar shows promise in medical and security applications. For accurate sensing, demodulation of the quadrature outputs of a direct-conversion Doppler radar is a great challenge. A digital signal processor based on Kalman filtering and principal component combining of quadrature channels is suggested. Rate...
Conventional low cost leg prosthesis, available in Third World countries, is essentially a fixed passive structure which makes walking possible with some difficulty, and climbing stairs with such is extremely difficult. The present work was taken to design prosthesis for above-knee amputees. The low cost bionic leg prosthesis, which has an active (battery powered) limited rotational movement of the...
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