| Title | A Genetic Model for Interference Suppression in DS-CDMA Systems
And Performance Comparison with Neural Network Receiver |
| Authors | B.Sivakumar S.Krishnan Dr.S.Subha Rani |
| Category | IT and Computing |
| Abstract | We present in this paper a new multi-user receiver using a Genetic Algorithm (GA) based decision scheme for interference suppression in Direct Sequence Code Division Multiple Access Wireless Systems (DS-CDMA). In this work a hybrid approach that employs a GA and Multi-user Detector for the multi-user detection (MUD) problems in CDMA/WCDMA cellular systems is investigated. The proposed GA approach with MUD performs well in the presence of Multiple Access Interference (MAI) under CDMA/WCDMA standard conditions. Cancellation of MAI is the prime concern in our work since it improves the performance of the system with increasing number of users. This paper also compares the performances of MUD using Neural Networks and GA with the standard optimum receiver which is a benchmark for synchronous CDMA systems. Simulation results for these above methods are provided to show that the approach is promising and encouraging. A comparative performance analysis of the four receivers, i.e. conventional, optimum, neural network, and genetic algorithm is carried out by simulations. In all examples considered, the proposed genetic receiver outperforms the neural network receiver. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p1/ |
| email | sivabs2000@yahoo.co.uk |
| Address | Dept. of Electronics & Communication Engineering,
PSG College of Technology, Peelamedu, Coimbatore-641004, India |
| |
| Title | A New design and Performance evaluation of Congestion Based Dynamic TCP Send Buffer Allocation |
| Authors | Ramachandra V. Pujeri, S. N. Sivanandam |
| Category | IT and Computing |
| Abstract | The network has grown in to a powerful tool in the recent past. The good utilization of resources can cause an immense change in server’s performance. One such valuable resource, which should be optimized, is the TCP Send Buffer[4]. Conventional methods of allocating send buffer waste a lot of server resources and are also inefficient, as they do not consider certain important factors which affect the utilization of the network. The CBD or Congestion Based Dynamic algorithm[5] proposed here tries to achieve an efficient use of the send buffer. It takes into account the important parameters of the transmission such as RTT send rate, maximum buffer size on the receiver’s side. In this algorithm, we set a functional value for each request and the buffer is allocated proportionately. To accomplish this we divide the send buffer space of the server into two segments. The Experimental Segment allocates send buffer for the new entrants temporarily and some time later the request will be swapped to the Processing Segment. This algorithm is capable of handling critical conditions such as congestion, ill-behaved clients since this algorithm is based on the function, which allows congestion control through a passive system such as a send buffer. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p10/ |
| email | sriramu_vp@yahoo.com |
| Address | Department of Computer Science and Engineering
PSG College of Technology, Coimbatore-641 004, India. |
| |
| Title | A Novel approach for Implementing Security services |
| Authors | Dr. S. N. Sivanandam, G.R.Karpagam |
| Category | IT and Computing |
| Abstract | To share information in the distributed systems environment, it is necessary to have a secured computing environment. Traditional software Engineering approach has not been successful in the security service development, because of the platform dependency and frequent change in security requirements. Model based software development addresses the problems faced with frequent changes. Model Driven Architectural approach (MDA) helps in achieving platform independence and supports interoperability. In this paper, Meta models are developed for implementing security services in Distributed systems using Generic Modeling Environment. An interpreter is developed to transform independent models to specific and vice versa, thereby achieving round trip engineering. This work helps in developing MDA Components for Security services in new and legacy systems |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p6/ |
| email | |
| Address | Dept of Computer Science and Engg PSG College of Technology, India |
| |
| Title | A Novel Image Compression Algorithm using Ridgelet Transformation with Modified SPIHT |
| Authors | N. Malmurugan,
A. Shanmugam,
S. Jayaraman,
A.R. Abdul Rajak |
| Category | IT and Computing |
| Abstract | An effective image coding technique which involves transforming the image into another domain with Ridgelet function and then quantizing the coefficients with modified SPIHT has been presented in this paper. Ridge functions are effective in representing functions that have discontinuities along straight lines. Normal Wavelet transforms fail to represent such functions effectively. SPIHT has been defined for normal wavelet decomposed images as an embedded quantization process. If the coefficients obtained from Ridgelet transform of the image with more discontinuities along straight lines have to subject to quantization process with SPIHT, the existing structure of the SPIHT should be modified to suit with the output of the Finite Ridgelet Transform (FRIT) . In this paper, a modified SPIHT algorithm for FRIT coefficients has been proposed. The results obtained from the combination of FRIT with modified SPIHT found much better than that obtained from the combination of Wavelet Transform with SPIHT. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p2/ |
| email | n_malan@mail.com |
| Address | Department of Electronics and Communication Engineering
PSG College of Technology, Coimbatore – 641 004, India, Bannariamman Institute of Technology, Sathyamanagalam – 638 401, India |
| |
| Title | A SELECTIVE SURVEY ON MULTIUSER DETECTION TECHNIQUES IN CDMA SYSTEMS |
| Authors | A. Rajeswari, Dr.K.Gunavathi, Dr. A. Shanmugam |
| Category | IT and Computing |
| Abstract | ue to the demand for cellular wireless services, recent interests are in techniques, which can improve the capacity of CDMA systems. One such technique is multiuser detection. The purpose of this article is to present a selected survey of the published literature in the area of multiuser detection techniques. The topics include discussion on multiple access interference cancellation techniques both linear and nonlinear. Also a very brief note on complexity of the multiuser detectors is also presented. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p8/ |
| email | |
| Address | Electronics and Communication Engineering Department, Coimbatore Institute of Technology, Coimbatore,India, Electronics and Communication Engineering Department,
PSG College of Technology, Coimbatore, India, Electronics and Communication Engineering Department, Bannari Amman Institute of Technology, Coimbatore, India |
| |
| Title | AN ALGEBRAIC SCHEME FOR THE DESIGN OF PID CONTROLLERS AND COMPENSATORS FOR LINEAR TIME INVARIANT CONTINUOUS SYSTEMS |
| Authors | K. Porkumaran, S. N. Sivanandam |
| Category | Electronics, Electrotechnics |
| Abstract | The design of a control system is concerned with the arrangement or the plan of the system structure and selection of suitable components and parameters. In classical control systems, the process of output response stabilization is attained by the selection of either Proportional - Integral- Derivative (PID) controllers or Phase compensators (Lead, Lag and Lead-Lag networks). This paper proposes an algebraic procedure for the design of controllers or compensators for a given Linear Time Invariant Continuous Systems (LTICS). The steps involved in this scheme are illustrated with the examples. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part1/p4/ |
| email | kporkumaran@myway.com |
| Address | Department of Computer Science and Engineering, PSG College of Technology
Coimbatore, India |
| |
| Title | ANALYSIS OF SENTENCES FOR SYNTACTIC VALIDITY |
| Authors | N. Rajkumar, S.N. Sivanandam and M.R.Karthik |
| Category | IT and Computing |
| Abstract | The aim of this work is the design and implementation of a system which analysis the natural language input sentence to see if it is grammatically correct. To do so it uses different modules to identify the words of the structure in which these words appear is correct. The dictionary is maintained in a static database contained in a separate file. Another module is used for conversion of the input string (sentence) in to a list for further processing. The main program parses the list of words to check for grammatical validity, using the other two modules. Once the syntax analysis is performed, and the sentence is found to be grammatically correct, semantic analysis may be performed to understand the meaning of the sentence. However semantic analysis will not be undertaken if the sentence was syntactically wrong. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p9/ |
| email | rnalliah@yahoo.co.in, Karthikv2k@yahoo.co.uk |
| Address | PSG College of technology, Coimbatore-641004, India |
| |
| Title | BEHAVIORAL MODELING AND FAULT SIMULATION OF SYSTEM ON CHIPS |
| Authors | P.Kalpana, Dr.K.Gunavathi |
| Category | Mathematics |
| Abstract | The ever-increasing capabilities of VLSI have allowed including the complex analog and digital circuits in a single chip. With growing circuit integration, tomorrow’s challenge of microelectronics is the System on Chip (SoC). Such complex, mixed-signal and mixed-technology circuits impose to reconsider traditional design methods. Behavioral modeling is one key, to explore high-level architecture possibilities. With HDLs, it is possible to simulate and synthesize the digital circuits. Behavioral level modeling of complex mixed signal VLSI circuits cannot be done with SPICE simulator. The solution for this is Analog hardware description language . Using VHDL-AMS language the high-level modeling of these circuits, which contains both analog and digital parts, can be described and simulated. The other problem in fault simulation of mixed signal circuits is simulation time. The proposed method reduces simulation time compared to SPICE simulation. In this paper system- level modeling of a Temperature controller chip and fault simulation of that circuit using the proposed method is described. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part1/p1/ |
| email | kalpana_shekar@yahoo.co.in |
| Address | Department of Electronics and communication engineering
P S G College of Technology
Coimbatore,INDIA |
| |
| Title | COMPARATIVE STUDY OF MEMBERSHIP FUNCTIONS FOR DESIGN OF FUZZY LOGIC FAULT DIAGNOSIS SYSTEM FOR SINGLE PHASE INDUCTION MOTOR |
| Authors | V. Duraisamy, N.Devarajan, D. Somasundareswari, S. N. Sivanandam |
| Category | IT and Computing |
| Abstract | This paper describes the application of fuzzy logic to detect incipient faults in single-phase induction motor. The insulation failure is considered to illustrate a fuzzy logic fault detector (FLFD). The FLFD is simulated using fuzzy logic toolbox in MATLAB. The performance of fuzzy logic fault detector has been analyzed through simulation studies with triangular, trapezoidal, Gaussian membership functions and results are compared. Investigations have been carried out considering three and five membership functions of triangular, trapezoidal and Gaussian membership shapes. The FLFD designed considering three membership functions requires minimum computation time. The performance of FLFD designed considering three membership functions of triangular shape is better than trapezoidal and Gaussian membership functions. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p4/ |
| email | vduraisamy@yahoo.com |
| Address | Govt College of Tech, Kumaraguru College of Tech, Dept of CSE, P.S.G College of Technology
Coimbatore, Tamilnadu, India |
| |
| Title | Design of Platform Specific Model and Transformation to Platform Independent Model for Persistent Services |
| Authors | Dr. R.Nadarajan R.Manavalan |
| Category | IT and Computing |
| Abstract | The special characteristic that makes the software industry stand apart from most other industries is its attitude to adapt to new technological changes, which leads to loss of existing investments. As a consequence, existing software is either ported to the new technology, or to a newer version of an existing technology. The software may remain unchanged utilizing the older technology, in which case the existing, now legacy, software needs to interoperate with new systems that will be built using new technology. The Paper based on Model Driven Architecture (MDA) that defines an approach to IT system specification, which separates the specification of system functionality from the specification of the implementation of that functionality on a specific technology platform. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p7/ |
| email | |
| Address | Dept of Mathematics and computer Applications PSG College of Technology, India |
| |
| Title | Fault oriented Test Pattern Generator for Digital to Analog converters |
| Authors | P.Kalpana , Dr.K.Gunavathi |
| Category | Mathematics |
| Abstract | The traditional tests are most expensive in terms of both test development costs and test implementation for analog and mixed signal circuits. In the commercial market, up to 80% of the test costs are due to the analog and mixed signal functions that typically occupy only around 10% of the chip area. So for testing the mixed signal ICs new testing strategies are investigated. In this paper, a novel test generation methodology for the detection of catastrophic faults in Digital to Analog converters (DAC) is proposed. The proposed fault oriented test generator computes the optimal test patterns based on genetic algorithm. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part1/p3/ |
| email | kalpana_shekar @ yahoo.co.in |
| Address | Department of Electronics and Communication Engineering
PSG College of Technology, INDIA |
| |
| Title | Fractional Alpha traffic model and Application |
| Authors | Bingyi Zhang Yamin Sun |
| Category | IT and Computing |
| Abstract | This is not a simple and trivial work to set up an appropriate network traffic model. A fractional Alpha model is proposed in this paper and two proofs based on flow and session level respectively are given. Proof and simulation show the model in this paper can describe the self-similarity, spike and the long range dependent between increments. Based on this mode, a formula for the residual of the queueing distribution function (RDF) is deduced. The formula in this paper meet real RDF better than the RDF based on other models. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p11/ |
| email | bingyizhang@163.com |
| Address | Department of Computer Science, Nanjing University of Science and Technology, Nanjing 210094, P.R. China |
| |
| Title | Linearization output parameters for electron beam accelerator with neural network |
| Authors | Sotir Sotirov, Andrey Nenov |
| Category | IT and Computing |
| Abstract | The accelerators of the elementary pieces are of particular importance for the research of the matter structure – the structure of the elementary pieces, the nature of the nuclear power, etc. This paper approaches a simple, quick and easy way of implementing algorithm for a linearization of electron beam current using neural network. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part6/p12/ |
| email | ssotirov@btu.bg, andrey@nenov.com |
| Address | Burgas University "prof. Asen Zlatarov" - Burgas , Bulgaria, Wholesale Wealth Systems, Scottsdale, AZ, USA |
| |
| Title | NON ADAPTIVE THRESHOLDING METHODS FOR
CORRECTING OCULAR ARTIFACTS IN EEG |
| Authors | Mrs V Krishnaveni , Dr S Jayaraman , Mr N Malmurugan, Dr A Kandaswamy , Dr K Ramadoss |
| Category | Electronics, Electrotechnics |
| Abstract | Electroencephalogram (EEG) is a bioelectric brain activity used as an important tool by physicians for studying the functional state of the brain and for diagnosing certain neurophysiological states and disorders. It is also used as a non-invasive approach for research in the quantitative study of neurophysiology. The presence of physiological artifacts such as eye blinks, in EEG recordings obscures the underlying processes and make analysis problematic. This paper discusses a wavelet based approach for correcting the artifacts generated by eye blink and eye ball movements in EEG. Various non adaptive thresholding methods are studied and an appropriate threshold limit and a thresholding function is found which shows its potential in mimimizing the magnitude of the ocular artifacts, while preserving the necessary background activity. The proposed method is automatic and is suitable for real time implementation. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part1/p2/ |
| email | venimurthy@hotmail.com |
| Address | Dept. of ECE, PSG College of Technology
Coimbatore – 641004, India |
| |
| Title | ON STRONG MAPS OF MATROIDS |
| Authors | Talal A. Al-Hawary |
| Category | Mathematics |
| Abstract | The aim of this paper is to introduce the notions of A-strong maps and B-strong maps between matroids as the maps that have the preimage of every flat is an A flat (B flat, respectively). Several significant results for A- and B-strong maps are provided. Moreover, we provide new decompositions of strong maps via these notions. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part3/p1/TALALAJMAN.PDF |
| email | drtalal@yahoo.com |
| Address | Department of Mathematics Sciences, Ajman University of Science & Technology, Ajman, United Arab Emirates |
| |
| Title | Parallel Buddy Prima – A Hybrid Parallel Frequent itemset mining algorithm for very large databases |
| Authors | Dr.S.N.Sivanandam, Dr.S.Sumathi, Ms.T.Hamsapriya, Mr.K.Babu |
| Category | IT and Computing |
| Abstract | Frequent itemset mining is essential for the discovery of association rules, strong rules, episodes, and
minimal keys. This paper describes a Parallel approach for association mining, based on Buddy Prima algorithm, that
combines bottom up and top down approach. Apriori algorithm, the widely used association mining technique uses the
breadth-first search, bottom up approach. The Apriori algorithm performs well only when the frequent itemsets are short.
Algorithms with top down approach are suitable for long frequent itemsets. This Parallel Buddy Prima algorithm
combines both bottom-up and top-down approach. The PRIMA representation consumes less memory as each transaction is replaced with the product of the equivalent prime numbers of their items. It reduces the time taken to determine the support count of the Itemset. Candidate distribution technique is adopted to handle large datasets with large itemsets. The performance of this algorithm is compared… |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/v13/part6/p3/par_buddy.pdf |
| email | prish_67@yahoo.co.in |
| Address | P.S.G College of Technology
Coimbatore, Tamilnadu, India |
| |
| Title | PEROXIDASE ACTIVITY AND PEA ROOTS SENSITIVITY TO Rhizobium INFECTION |
| Authors | Galina P. Akimova, Marina G. Sokolova, Lyudmila V. Nechaeva, Galina B. Luzova, Klavdiya K. Sidorova |
| Category | Chemistry |
| Abstract | The present work is dedicated to determination of dynamics of peroxidase activity in the pea root sectors characterized by different degree of sensitivity to Rhizobium leguminosarum infection with the objective to investigation the role of peroxidase in the mechanism of Rhizobium leguminosarum interaction with pea plants. Enzyme activity is shown to have different orientation of changes in the root sectors differing in rhizobia-sensitivity. In the sectors at 0-20 mm from the roots tip (more infection-sensitive) peroxidase activity with inoculation slightly decreases or remains unchanged, whereas in more differentiated sectors (not sensitive to infection) it significantly increases. In pea plants infected by bacteriosis peroxidase activity in peroxidase activity in both sectors goes up considerably. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part2/p3/ |
| email | ustaft@sifibr.irk.ru |
| Address | Siberian Institute of Plant Physiology and Biochemistry SD RAS and Institute of Cytology and Genetics SD RAS |
| |
| Title | Riesz basicity of the system of exponents with degenerated coefficients. |
| Authors | Sadiq G.Veliyev |
| Category | Mathematics |
| Abstract | System of exponents of the form…. |
| Issue | 13 |
| Date_posted | 11/6/2004 |
| URL (full text) | http://www.acadjournal.com/2004/V13/Part3/p2/ |
| email | nmi@nakhcivan.az |
| Address | Nakhcivan Teachers Institute
AZ 7012,Nakhchivan,the Azerbaiyan Republic |
| |
