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In binary decision diagram (BDD) based realization of logic circuits, the area and power consumption is determined by the total number of nodes of the BDD and the expected switching activity of the nodes. A proper polarity selection of the subfunctions can not only reduce the number of BDD nodes, but also the switching. For a multi-output function, more the sharing between the subfunctions, more is...
In this paper we have proposed a multimedia supported uplink scheduler for IEEE 802.16d OFDMA network, which includes a proportional fair (PF) scheduler in base station (BS) and earliest due date scheduler (EDD) in subscriber station (SS). The PF scheduler in the BS allocates the OFDMA resources to each SS according to their bandwidth request. The EDD scheduler in the SS utilizes the allocated resources...
Mobile ad hoc networks are formed by devices that can communicate with each other using a wireless physical medium without pre-existing infrastructure. Each node can function not only as end systems, but also as intermediate systems providing connectivity and data path to the other nodes. This can be realizable through designing of comprehensive and functional routing protocols. Petri net models allow...
Computational grids are emerging as a computing paradigm for solving challenging applications in science, engineering and economics. Since the grid is a vast array of resources, monitoring of the grid is essential to improve debugging facilities and performance enhancement. Monitoring system must be able to provide information about the current state of various grid entities such as grid resources...
The advancements of service oriented computing in geospatial domain have raised several issues regarding service discovery and execution. It is often observed that a service alone often fails to fulfil users' requirement. On the other hand, a sequence of geospatial services together can be used towards satisfying a composite request. Thus a composition methodology of geospatial services needs to be...
The growing number of E-learning programmes and parallel developments in the field of information and communication technology (ICT) has put forth many technological options to both the learner and instructor communities. The advent and popularization of ubiquitous computing and mobile devices have redefined the concept of E-learning by providing learners with variety of options to interact with E-learning...
A novel and fast technique for cryptographic applications is designed and developed using the symmetric key algorithm "MAJE4" and the popular asymmetric key algorithm "RSA". The MAJE4 algorithm is used for encryption/decryption of files since it is much faster and occupies less memory than RSA. The RSA algorithm is used to solve the problem of key exchange as well as to accomplish...
An efficient approach to achieve the tasks such as, regional language narration, regional language captioning system and keywords based efficacious seek to save the bandwidth, is introduced in this paper. The goal is to reduce the language barrier and seeking time for E-learning videos. The paper presents an innovative solution of E-learning multimedia delivery package for client-server model. The...
Congestion control provides quality of service over the best effort networks. Congestion occurred when arrival rate to a router is greater than its departure rate. In this paper, using fuzzy logic approach, we have proposed a modified TCP equation-based active queue management mechanism which is based on traditional GREEN algorithm. Here we present our fuzzy GREEN controller which is expected to act...
A new threshold based Wavelet ECG data compression method is proposed. The proposed method uses linear phase Biorthogonal 9/7 discrete Wavelet transform. Wavelet coefficients are selected based on energy packing efficiency of each subband. Significant wavelet coefficients are quantized with uniform scalar zero zone quantizer (USZZQ). Significance map is created to store the indices of the significant...
Digital filter structures based on current-conversion generalized immittance converter (CGIC) proposed by Antoniou and Rezk possess excellent sensitivity and stability characteristics. In this paper, the CGIC structures of low pass and high pass are analyzed to determine the clock period to be used with these structures for VLSI applications and are modified to reduce the clock period further to increase...
In 2004 Das et al. proposed a "dynamic ID based remote user authentication scheme using smart cards" that allows the user to choose and change their password freely and does not maintain any verifier table. It can protect against ID-theft, replay attack, forgery attack, guessing attack, insider attack and stolen verifier attack. However, Awasthi and Lai, have pointed out several weaknesses...
The figure of merit of an on-chip spiral inductor is given by its quality factor (g), self resonance frequency (fres) and optimum frequency (fmax). This paper presents a systematic analysis of the tradeoffs of the figure of merits with the layout parameters associated with the spiral inductor. The width of the metal trace of the spiral must be decided based on the desired operating frequency and the...
Sign language is the most natural and expressive way for the hearing impaired. Because of this, automatic sign language recognition has long attracted vision researchers. It offers enhancement of communication capabilities for the speech and hearing impaired, promising improved social opportunities and integration. This paper describes a gesture recognition system which can recognize wide classes...
In this work, we propose three compensation techniques for reduction of stress or emotion effect and improvement in speaker recognition. The degradation of speaker recognition due to emotion has been analyzed on stressed speech database. First compensation technique is based on identification and removal of stressed vector from a set of feature vectors. Second compensation technique uses excitation...
Basic SiC bipolar transistors have been studied in the past for their applications where high power or high temperature operation is required. However since the current gain in SiC bipolar transistors is very low and therefore, a large base drive is required in high current applications. Therefore, it is important to enhance the current gain of SiC bipolar transistors. Using two dimensional mixed...
An adaptive rank-order based switching median filter is proposed in this paper for the restoration of digital images corrupted with salt & pepper impulse noise. A more ideal and efficient impulse noise filter, the ARSMF detects all the corrupted pixels even when the image is highly corrupted and restores them with a more perfect signal detected from an appropriate region whose dimensions vary...
The following topics are dealt with: signal processing; networks; communications; applied signal processing; speech processing; information technology; security and encryption; biomedical applications; image processing; electronics
We show applications of a new global optimization strategy that combines support vector machine (SVM) learning with simple local search. The use of SVM learning allows prediction of locations of the global optimum from knowledge of a few local minima. This is particularly valuable in VLSI design applications, where the search space is extremely large. The approach does not need the cost function or...
In this paper, we propose a regularized least squares approach to potential SVRs. The proposed solution involves inverting a single matrix of small dimension. In the case of linear SVRs, the size of the matrix is independent of the number of data samples. Results involving benchmark data sets demonstrate the computational advantages of the proposal. In a recent publication, it has been highlighted...
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