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In the past decade the utilization of renewable energy is ever increasing due to the scarcity of fossil fuels. The excessive power from renewable energy is considered mandatory in integration that improves the performance of the electric transmission system in terms of better reliability and eco green power generation. Extraction of abundant of power from the solar and interfacing to the electric...
This paper presents a bidirectional double-boost dc-dc converter with higher efficiency for renewable energy applications. The proposed converter uses a non-dissipative RCD snubber, that not only reduces the voltage stress but also provides better efficiency to the converter. This bidirectional double-boost dc-dc converter operates under two modes namely charging and discharging. Under both charging...
Aircraft technology has been witnessing a complete revamp in the past two decades. The traditional mechanical, pneumatic and hydraulic systems in civil aircrafts are beginning to be replaced by lighter and compact electrical systems. Inverters are indispensable in an aircraft electric system and are employed for conversion of DC power to AC. Multilevel inverters reduces the harmonic content in the...
This paper deals with design and development of high frequency, high power Resister, Capacitor and Diode (RCD) clamp forward converter for Radar application. RCD clamp reset technique is used to reset the energy stored in the transformer during turn off. It is less expensive than using a tertiary winding, and as it allows duty cycle excursions above 50% and it greatly improves the behaviour in half-cycle...
This paper presents modified topologies for the Z-source inverter. The main objective of the modifications are to get higher boost factor, less voltage stress across the switches as well as reduction of the number of passive components. Two types of inverter topologies are presented in this paper. They are ripple-input current proposed inverter (r-proposed inverter) and continuous-input current proposed...
MRAS estimators have become increasingly popular due to their ease of computational usage, flexibility and accurateness in determining the rotor speed of induction motors without speed sensors mounted on the shaft. This paper considers the three most popularly used configurations of MRAS Speed Estimators i.e., Rotor Flux, Back-EMF and Instantaneous Reactive power. The dynamic performance of the same...
Providing healthcare services in the rural parts of India is a big challenge mainly due to dismal doctor — patient ratio. Deadly diseases like cancer need experts to detect and diagnosis. Breast cancer, is the second major type of cancer found in women worldwide. Mammography screening has been proven to be most effective in reducing the mortality rate of breast cancer, with the application of advanced...
Energy Data Management (EDM) Utilities cater to the needs of energy data management, dissemination and analytics. Data management applies management of data collected from smart grids and smart meters, meter data analytics. The use of one database for different kinds of requirements may lead to non-performing solutions; storing energy generation, distribution and consumption data from smart grids,...
Impact ionisation MOSFET (IMOS) is a new and promising alternative for conventional MOSFET owing to its low subthreshold slope. With the aid of TCAD simulation tools and the resultant figures, the basic physics behind IMOS operation has been studied in this paper. The Id-Vg curve resulting from this study having a subthreshold slope of 1.272mV/dec is also presented in the paper.
It is highly desired to protect online resources from web bots through some form of Human Interaction Proof (HIP) such as CAPTCHA tests. However, there are several challenges associated with designing highly secure and usable CAPTCHA tests. These include challenges to implement, maintain, and upgrade CAPTCHA tests individually for each web application. In addition to these, accessibility to multilingual...
This paper presents a method for automatic classification of environmental sounds into three major categories, namely bird sounds, human speech and noise. Three various algorithms are used to classify the sounds individually and their efficiencies are compared. The classification algorithms are based on cyclostationary features, Mel Frequency Cepstral Coefficients (MFCC) and our proposed algorithm...
Digital image watermarking is being extensively used for protecting sensitive image data transmitted over insecure channels. Watermarks are primarily used for two fold operations, copyright protection and content authentication. Robust image watermarks are used for copyright protection and fragile watermarks used for the content authentication. In this paper fragility evaluation of a fragile image...
Motion blur is a most common degradation present in the photograph captured from hand held camera. Minute visual details are lost and spreaded over pixels creating smearing impact in captured image due to motion blur. It's hazardous for machine vision application and should be corrected by any restoration methodology. As no information is available about kind of degradation and true image, restoration...
The paramount concern in any adhoc network is Security. In Mobile Adhoc NETworks (MANETs), providing security services poses a problem due to the mobility of the nodes. The ad-hoc network uses wireless communication link between the mobile nodes and hence is more vulnerable to attacks. In Sybil Attack a malicious node creates illegitimate multiple fake identities (called the Sybil nodes) to impersonate...
Brain is the most important and vital organ of the human body. The control and coordination of all the other vital structures is carried out by the brain. The tumor is formed by the uncontrolled multiplication of cell division. Numerous techniques were developed to detect and segment the brain tumor. Using thresholding and morphological operations efficient brain tumor segmentation is carried out...
Diagnosis of the disease is one of the application areas where data mining techniques helps in the extraction of knowledge from medical database. Recently, researchers have been investigating the effect of cascading more than one technique showing enhanced results in the diagnosis of the disease. This paper proposes a hybrid model using K-means as a preprocessing algorithm. The proposed model is developed...
Major developments in image capture and image editing technologies have resulted in enormous increase of near duplicate data generation. This coupled with increased use of internet and availability of storage has led to large databases of such images being available. Hence, near-duplicate image detection and retrieval is an essential operation to refine image search results for effective user investigation...
Many multimedia applications over Mobile Ad hoc NETworks (MANETs) require Quality of Service (QoS) to meet real-time services. Resource prediction, resource allocation and quality prediction are important component for QoS provisioning which is affected by many factors such as latency, bandwidth, reliability, packet-loss, memory size, buffer cache, available capacity, and CPU speed. Media Access Control...
Fast Oil Paint Image filter is a performance optimized oil paint algorithm. Current oil paint algorithms are CPU intensive and take a long time to produce the output; further the time taken increases exponentially with increasing quality. One of the main causes is re-computation. The proposed algorithm significantly reduces re-computation reducing the processing time by approximately 86%. The research...
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