| Title | Optimum Reactive Power Dispatch Using Genetic Algorithm |
| Authors | P.Subburaj, N.Sudha, K.Rajeswari, Dr.K.Ramar and Dr.L.Ganesan |
| Category | IT and Computing |
| Abstract | Reactive Power Dispatch (RPD) is one of the important tasks in the operation and control of the power system. RPD problem can be formulated as a non-linear constrained optimization problem. This paper presents a Genetic Algorithm (GA) approach for solving the reactive power dispatch problem including the line flow constraint. Minimizations of real power loss with FACTS and without FACTS devices are the objectives of this reactive power optimization problem. The proposed algorithm has been applied to find the optimal reactive power control variables in IEEE 30 and IEEE 118-bus systems. The simulation results are promising and show the effectiveness and robustness of the proposed approach. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p6/ |
| email | subbunec@yahoo.com |
| Address | Dept Of Electrical Engg
National Engg College |
| |
| Title | A NOVEL ARCHITECTURE FOR VLIW PROCESSOR |
| Authors | R. SESHASAYANAN and DR.S.K.SRIVATSA |
| Category | IT and Computing |
| Abstract | Technology has seen the development of processor industry right from micro to the latest Nanotechnology with speed being important criteria. Not much attention has been given to the power required to drive these Integrated Circuits. With gaining popularity in mobile computing, developing mobile processors have gained popularity since these processors possess unique properties like low power
consumption and dissipation. This paper aims at designing a low power Very Long Instruction Word
(VLIW) processor with built in FFT processor, which uses single clock frequency. This VLIW processor is
designed with two modules one for VLIW processor and the other one is Hybrid dynamic voltage scaling module. Using the DVS algorithm the power can be reduced up to 20 to 25 % of normal VLIW processor.
The design is simulated and synthesized using Xilinx project Navigator and the report is given in the paper. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p8/novel.pdf |
| email | se_sha_sa@yahoo.com |
| Address | Anna University, Chennai – 600 025 |
| |
| Title | A Single Resistance Controlled Eight Possible Oscillator circuits for Analog Signal Processing Applications |
| Authors | A. Kumar and A. L. Vyas |
| Category | Electronics, Electrotechnics |
| Abstract | A single resistance controlled oscillator using two current conveyors, two (or three) grounded capacitors and three (or two) grounded resisters are presented. This paper presents the condition of oscillation and the frequency of oscillation for eight oscillator possible circuits. The proposed circuits enjoy oscillation control through a single grounded passive element. The group of passive component oscillator provides the following advantages e.g. the oscillation frequency can be independently controlled by grounded resistors and all the passive components which are suitable for IC implementation are grounded. The proposed circuit has very good frequency stability. Experimental results are found to be in conformity with the theoretical analysis. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part1/p2/ |
| email | anuj_chauhan97@yahoo.co.in |
| Address | Advanced Instrumentation Lab Instrument Design and Development Centre
Indian Institute of Technology Delhi, New Delhi-110016, India |
| |
| Title | Analysis of Mobile Communication spread and its implications in India |
| Authors | V.Thulasi Bai, A.Ganesan and S.K.Srivatsa |
| Category | IT and Computing |
| Abstract | The telecommunication network in India is one of the largest in the world providing wide-ranging services such as basic, cellular, internet, radio paging, VSAT etc. India is the fifth country to cross the 100 million mobile subscriber mark to join Russia, Japan, United States and China. Indian Telecom Sector is one of the fastest growing sectors of the economy, growing at an average of more than 20 percent over the last four years The country has an investment potential estimated at US$ 37 billion by 2005 and US$ 69 billion by 2010.
India has 48 million fixed telephone connections, growing at 22 per cent per annum and almost 100 million cellular phone connections, growing at 100 per cent per annum. The telecom network in the country comprises over 35,000 exchanges with switching capacity of over 47 million, 427 digital trunk automatic exchanges, and over 326,271 route km of optic fibre network. In addition to the two state-owned companies BSNL and MTNL, several private players have established a significant presence in both the basic and cellular markets.
The Indian telecommunications sector has undergone a major process of transformation because of significant Government policy reforms during the recent years. The New Telecom Policy, 1999 focused on creating an ideal environment for investment, establishing communication infrastructure by leveraging on technological development and providing affordable telecom services to all. These objectives of the policies have resulted in rapid growth of subscribers and lower tariffs. We believe that with these major initiatives of the Government, the mobile market in India will have a promising future. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p7/ |
| email | thulasi_bai@ yahoo.com |
| Address | Institute of Science and Technology, Chennai, TamilNadu, India |
| |
| Title | Convective diffusion process of blood vessels in the presence of porous effects |
| Authors | Anil Kumar |
| Category | Mathematics |
| Abstract | In this paper, convective dominated diffusion process in an axisymmetric
tube with a local constriction simulating a stenosed artery
considering the porosity effects is carried out. The investigations demonstrate the effects of wall shear stress and recirculating flow on the concentration distribution in the vessels lumen and on wall mass transfer keeping the porosity in view. The flow is governed by the incompressible Navier-Stokes equations for Newtonian fluid in porous effects. The convection diffusion equation is used for the mass transport. The effect of porosity is examined on the velocity field and wall shear stress. The numerical solutions of the flow equations and the coupled mass transport equations are solved using finite difference scheme. The study explains the effect of porosity of the flow on the mass transport. The works that consider the possibility of reducing these flow instabilities using porous effect are reviewed. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part3/p1/convective.pdf |
| email | drkumaranil73@yahoo.co.in |
| Address | Department of Mathematics
Dr. K. N. Modi Institute of Engineering & Technology,
Modinagar-201204, Ghaziabad (India) |
| |
| Title | Denial of Service attack through compromised nodes in Mobile Ad-Hoc Networks |
| Authors | R. Praveen Sam, Dr. B. Stephen Charles and Dr. P. Chandrasekhar Reddy |
| Category | IT and Computing |
| Abstract | Mobile Ad-Hoc networks will often be deployed in environments where the nodes of the networks are unattended and have little or no physical protection against tampering. The nodes of mobile Ad-Hoc networks are thus susceptible to compromise. The networks are particularly vulnerable to denial of service (DOS) attacks launched through compromised nodes or intruders. In this paper, we present a new DOS attack and its defense in Ad-Hoc networks. The new DOS attack, called Ad-Hoc Flooding Attack, can result in denial of service when used against on-demand routing protocols for mobile Ad-Hoc networks such as AODV, DSR. The intruder broadcasts mass Route Request packets to exhaust the communication bandwidth and node resource, so that the valid communication cannot be kept. After analyzing Ad-Hoc Flooding Attack, we develop Flooding Attack Prevention, a generic defense against the Ad-Hoc Flooding Attack in mobile Ad-Hoc networks. When the intruder broadcasts exceeding packets of Route Request, the immediate neighbors of the intruder record the rate of Route Request. Once the threshold is exceeded, nodes deny any future request packets from the intruder. The results of our implementation show FAP can prevent the Ad-Hoc Flooding attack efficiently. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p3/ |
| email | praveen _sam75@yahoo.com |
| Address | CSE Dept, G. Pulla Reddy Engg. College,
Kurnool , A.P, INDIA. |
| |
| Title | Frame work on Channel Estimation Techniques for OFDM System |
| Authors | RAJESH GOEL, TARUN SHARMA and DR. P.K.BANSAL |
| Category | IT and Computing |
| Abstract | This paper proposes the channel estimation techniques for OFDM systems based on pilot arrangement. The channel estimation based on pilot symbol aided OFDM modulation scheme have been implemented for both , estimating channel at pilot frequencies and interpolating the channel. BER performances of proposed scheme with the other known schemes have been compared and the effectiveness of the proposed OFDM transmission system has been shown in terms of BER. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p4/ |
| email | eced@rediffmail.com |
| Address | ,Department Of ECE,
Ambala College of Engineering and Applied Research P.O. Sambalkha, Ambala. (133101) India |
| |
| Title | Heavy Metal Hyper-accumulation in Plants and Metal Distribution in Soil on Tannery and Dying Industries Polluted Area in Bangladesh |
| Authors | Mohammed Mahabubur Rahman, L Haoliang, Y Chongling and Sirajul Hoque |
| Category | Chemistry |
| Abstract | The unplanned discharge of all the by-products, garbage, pollutants and effluents from tannery, and dying industries are caused serious pollution problems in environment. A study was conducted to investigate the indigenous plant species which are well adopted to the polluted environment as effected by industrial effluents which can accumulate higher concentration of heavy metals of dying and tannery industries around Dhaka city in Bangladesh. The pollutants in both contaminated soils were also compared. The results showed that concentrations of Lead(Pb)and Cadmium (Cd)were ranged from 219.183-2.673 ppm and 1.343-0.316 ppm, respectively, in seven plants samples Enhydra fluctuans Lour, Ipomoea aquatica Forsk, Colocasia esculenta L., Spilanthes acmella L., Polygonum hydropiper L., Cyperus rotundus L., Echinochloa colonum L. Exceptionally high value of 219.18 ppm was found in Ipomoea aquatica. The Lead concentration in other plants species ranged between 26.07 and 36.61 ppm. Our results indicated that Ipomoea aquatica may be acted as a Pb hyper-accumulator.
The concentration of nutrients and heavy metals of N, K, S, P, Pb and Cd ranged from, 388.90-10032.00, 992.90-2642.10, 2797.00-9762.00, 18.60-932.50, 8.52-32.88 and 0.28-1.85 ppm in soil, respectively among the industrial sites. Polluted soil contained considerable higher amount of heavy metal in tannery than dying. There are no significant differences (P>0.05) of pollutants distribution between two sites. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part2/p1/ |
| email | t_mahabub@yahoo.com |
| Address | Department of Botany, Dhaka Imperial College, 28 Mirpur Road, Dhaka 1205, Bangladesh |
| |
| Title | Knapsack based ACCS Information Retrieval Framework for Bio-Medical Literature using Similarity based Clustering Approach. |
| Authors | K.Latha, S.Archana, R.John Regies and Dr. R.Rajaram |
| Category | IT and Computing |
| Abstract | Current advances in high-throughput biology are accompanied by a tremendous increase in the number of related publications. Much biomedical information is reported in the vast amount of literature. Given the millions of published documents, the field of Information Retrieval (IR), which is concerned with the identification of relevant documents from large text collections that need to be properly extracted. The objective of this paper is to build a text mining framework, which consists of four distinct stages such as 1.Text Gathering 2.Text Preprocessing 3.Clustering based on similarity approach and 4.Information retrieval process using three different methodologies such as 1. Proposed Knapsack based Ant colony Cluster Selection (ACCS) 2.Proposed Knapsack and 3.Simulated Annealing Approach. The above three methodologies are presented to resolve Retrieval problems in IR. Experimental results on standard Retrieval benchmarks demonstrate the ACCS is more direct, easy to implement, and more efficient than previous methods. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p5/ |
| email | k_l_latha@yahoo.co.in |
| Address | Thiagarajar College of Engineering,
Madurai - 15, Tamil Nadu,
India (South). |
| |
| Title | Predicting stress variations in a repetitive design process using artificial neural networks |
| Authors | C Santosh Kumar, Mahendra K V |
| Category | IT and Computing |
| Abstract | Design of a plate with geometrical discontinuity such as a hole or notch requires special attention, as the stress concentration near the hole will be higher than the average stress in the body. Due consideration should be given to stress concentration factor (Kt), as Kt varies phenomenally for the variation in the width (W) of the plate for a constant hole diameter (d). The plate with a hole is studied using finite element method. The results obtained are used to model the Artificial Neural Networks (ANN). In the present investigation, the stress distribution across the plate for varying values of the load & d/W is modeled using ANN. The network is utilized to predict the stress variations with varying load conditions for a constant d/W ratio and the least d/W ratio which provides minimum stress concentration in a plane with a hole. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p1/ |
| email | cskjain@gmail.com |
| Address | Department of Mechanical Engineering, New Horizon College of Engineering,
Bangalore, Karnataka 560 087, India |
| |
| Title | Segmentation of chromosome spread images
using transform based curve evolution methods
- standardization and quantification |
| Authors | A.Prabhu Britto and Dr. G.Ravindran |
| Category | Electronics, Electrotechnics |
| Abstract | In this research, Characterization of Discrete Cosine Transform (DCT) based Gradient Vector Flow (GVF) Active Contours as a suitable boundary mapping technique for Chromosome spread images is done. Suitability of the characterized parameters governing the DCT based GVF Active Contour formulation as standardized values for boundary mapping similar classes of Chromosome spread images is also established. Characterization studies have shown that each parameter has an optimal range of values within which good boundary mapping results can be obtained for various chromosomes in similar class of images. Statistical testing validates the experimental results of characterization. Standardization of characterized parameters is then carried out using a different dataset comprising of similar class of chromosome spread images. Error Quantification is done to validate Standardization. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part1/p1/ |
| email | |
| Address | Center for Medical Electronics, Department of Electronics and Communication Engineering, Anna University, Chennai 600 025 INDIA |
| |
| Title | Signs of information perfection in distributing critical temperatures in the nature |
| Authors | David Kisets |
| Category | Physics, Astronomy |
| Abstract | This paper presents results of exploring, based on mathematical analysis, to what extent allocations of critical temperatures of the Elements and blood as examples of steady quantitative manifestations in the nature conform to such fundamental concepts of mathematical relation as harmony, balance and information optimality. The conformity is considered as a sign of perfection, and the concepts are interpreted by corresponding constants on the numerical ratio scale. The recently formulated Law of Information Constants has also been used in the exploration as an integrated estimation criterion. It is demonstrated that regarding temperature scale the sought conformity exists for parameters of statistical distribution of boiling and melting temperatures of the Elements, and for critical blood temperatures. The existence of specific temperature point on the blood temperature scale is discovered, which meets the requirements both the information optimality and harmony. The author believes that this paper marks the beginning of studying the informational perfection by means of the joint usage of the above-mentioned concepts in various steady quantitative manifestations and regularities. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part5/p1/ |
| email | davein@netvision.net.il |
| Address | The National Physical Laboratory of Israel, Danziger “A” bldg., Hebrew University
Givat-Ram, Jerusalem, 91904, Israel. |
| |
| Title | WebATU: Web Service Automated Testing Utility |
| Authors | Deena Yunam, N.Ch.S.N.Iyengar and A.Kannammal* |
| Category | IT and Computing |
| Abstract | Web Services is arguably the most powerful and popular software technology in today’s connected e-world. This paper gives a briefing about web services and also touches upon the various standards that have evolved over the years, such as XML, SOAP, WSDL, and UDDI. This paper advocates the need for testing web services as Testing Web Services poses a big challenge to testing professionals because of its inherently complex and distributed nature. Web Service Automated Testing Utility (WebATU) will enable us to locate and invoke web service methods directly. It supports all of the core Web service technologies like WDSL, SOAP, and it is an ideal Web service tool for testing Web services, inspecting WSDL files, automating or accelerating verification of each component when developing Web service enabled applications. |
| Issue | 21 |
| Date_posted | 7/27/2007 |
| URL (full text) | http://www.acadjournal.com/2007/V21/part6/p2/ |
| email | nchsniyr@yahoo.com |
| Address | School of Computer Sciences
Vellore Institute of Technology,Deemed University
Vellore-632014 T.N, India |
| |
