The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Continuous effort to achieve higher performance without driving up the power consumption and thermal effects has led the researchers to look for alternative architectures for microprocessors. Like the parallel processing which is extensively used in today's all microprocessors, multi-core architecture which combines several independent microprocessor cores in a single die has currently become very...
Caches which are an essential part of memory systems consume a significant amount of power. A number of techniques have been proposed in the literature to reduce power consumption in cache modules. In this paper a survey of various widely used circuit and architecture level techniques for cache power management system is presented to investigate an effective approach for multi-core system-on-chip...
This paper presents a learning model of multitask pattern recognition (MTPR) which is constructed by several neural classifiers, long-term memories, and the detector of task changes. In the MTPR problem, several multi-class classification tasks are sequentially given to the learning model without notifying their task categories. This implies that the learning model is supposed to detect task changes...
This article addresses color image segmentation in hue-saturation space. A model for circular data is provided by the vM-Gauss distribution, which is a joint distribution of von-Mises and Gaussian distribution. The mixture of vM-Gauss distribution is used to model hue-saturation data. A cluster merging process is applied to separate such identifiable objects in the image. The results are shown on...
The goal of this article is twofold. First, it deals with color image segmentation in hue-saturation space. A model for circular data is provided by the vM-Gauss distribution, which is a joint distribution of von-Mises and Gaussian distributions. The mixture of vM-Gauss distributions is used to model hue-saturation data. After segmentation, a post processing based on both spectral and spatial similarity...
In this paper, a generalized design methodology for operational transconductance amplifier (OTA) based current mode radio frequency (RF) communication circuit is proposed. Three novel communication circuits, phase lock loop (PLL), adaptive delta modulator (ADM) and data compressor have been simulated. In the first implementation, direct frequency modulation is used to realize PLL, while the second...
In this paper, we describe an efficient authentication protocol for group communication in hybrid wireless networks with a satellite overlay. The proposed protocol uses a new class of lightweight, symmetric-key certificates called TESLA certificate. The certificates bind the identities of the senders to the anchor elements of their key chains; messages from the senders are authenticated by MACs computed...
A pulse power system (1 MV, 5 0kA, and 100 ns) based on dual polarity charged Marx generator and Blumlein pulse forming line (PFL) was built to generate high power microwaves. This paper describes the inherent prepulse present with the Blumlein configuration and the mitigation strategies adopted. Further, a qualitative attempt to verify the generation of high power microwave output on the system is...
This paper presents a simple mathematical analysis of some features of the Harmony Search algorithm (HS). HS is a recently developed derivative-free optimization algorithm, which draws inspiration from the musical process of searching for a perfect state of harmony. This work analyses the evolution of the population-variance over successive generations in HS and thereby draws some important conclusions...
Here we present a method of QT interval measurement for Physionetpsilas online QT Challenge ECG database using the wavelets Daubechies 6 and 8 and Symlet 6 and time plane features. Doing so we found that out of these three wavelets Daubechies 6 gives the best output and when averaged with the interval of time plane feature extraction method it gives least percentage of error with respect to the median...
While wide-area video surveillance is an important application, it is often not practical, from a technical and social perspective, to have video cameras that completely cover the entire region of interest. For obtaining good surveillance results in a sparse camera networks requires that they be complemented by additional sensors with different modalities, their intelligent assignment in a dynamic...
This paper addresses the impacts of signal slew time and signal skew variations on delay uncertainty and cross talk noise in coupled inductive lines for different switching patterns. Our findings reveal that delay variation in a victim line always increases with the reduction of signal slew time and increase in signal skew. We also observe that cross talk noise reduces with increasing signal skew,...
The paper presents a novel high speed and low power 15-4 Compressor for high speed and low power multiplication applications. The proposed compressor uses bit sliced adder architecture to exploit the parallelism in the computation of sum of 15 input bits by five full adders. The newly proposed compressor is also centered around the design of a novel 5-3 compressor that attempts to minimize the stage...
Summary form only given. Intense relativistic electron beam generation studies were carried out in a planar diode configuration to investigate the effect of the plasma expansion on the impedance characteristics of the diode. The diode voltage and current waveforms were analyzed with the bipolar space-charge limited flow model. The anode and cathode plasma expansion velocities were calculated using...
Summary form only given. Intense gigawatt relativistic electron beam generation studies were carried out in the presence of prepulse. Electron beams were generated using planar and annular graphite cathodes of various diameters. At 25 mm anode-cathode gap beam parameters obtained are 386 kV, 25 kA, 100 ns. A bipolar prepulse voltage has been recorded at the diode for both the cathodes. Amplitude of...
Emerging applications like video surveillance, telemedicine and traffic monitoring requires multimedia transmission over wireless sensor networks. Offering some precise QoS-guarantee (e.g.end-to-end delay and bandwidth requirement) for wireless multimedia over already battery-constrained sensor networks raises significant challenges. This demands for a suitable sensory MAC protocol capable of achieving...
The design targets of an interconnect are to ensure less delay cycles, high reliability and low power consumption at the same time. This paper presents an in-depth analysis of the dependencies of the reliability (in terms of bit error rate (BER)) and the power consumption of wire pipelining scheme on the number of inserted flip-flops and the size of repeaters. To trade off the design targets, a methodology...
This paper investigates the impacts of signal rise/fall time and signal skew variations on voltage overshoot and propagation delay in inductive lines for different switching patterns. Equivalent circuit model parameters have been extracted using FastCap and FastHenry field solvers, and results have been obtained by HSpice simulator. Most existing works study the different switching patterns considering...
Software defined radios (SDR) can be found in every area of wireless signal processing. SDRs realized so far are mostly part of communication technology, including audio broadcast receivers. Image- and video processing in SDRs is not common due to the fact that this type of real-time application requires a huge amount of processing resources. It can be foreseen that SDRs for video processing will...
Turbo codes allow reliable data communication at signal-to-noise ratios very close to those predicted by Shannon. Further, breaking up the decoding task so that separate decoders work on the two constituent codes, passing extrinsic information between them, greatly simplifies the implementation of the decoder. Traditionally, the statistical model for noise used in the design and analysis of the decoder...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.