Saturday 31 January 2009

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Transactions: WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL
Transactions ID Number: 32-201
Full Name: Daniel Vladušič
Position: Doctor (Researcher)
Age: ON
Sex: Male
Address: Pot za Brdom 100
Country: SLOVENIA
Tel:
Tel prefix:
Fax:
E-mail address: daniel.vladusic@xlab.si
Other E-mails: daniel.vladusic@gmail.com
Title of the Paper: Using the black-box approach with machine learning methods in order to improve job scheduling in GRID environments
Authors as they appear in the Paper: Daniel Vladušič
Email addresses of all the authors: daniel.vladusic@xlab.si
Number of paper pages: 12
Abstract: This article focuses on mapping jobs to resources with use of off-the-shelf machine learning methods. The machine learning methods are used in the black-box manner, having a wide variety of parameters for internal cross validation. In the article we focus on two sets of experiments, both constructed with a goal of congesting the system. In the first part, the machine learning methods are used as assistants for the base resource selection algorithms, while in the second part, they are used to directly select the resource for job execution. We set up two experiments with different objectives. In the first experiment, the objective was to maximize the number of jobs finished within the deadline, while in the second experiment, the objective was to minimize the job tardiness. Finally, in the first part we were changing resource selections of simple job dispatching algorithms, while in the second part, we were employing the optimization scheme of the ALEA algorithm. Th!
e results show that even with a such black-box approach of the off-the-shelf machine learning methods, we can achieve improvements or at least get comparable results.
Keywords: Scheduling, Dispatching jobs in GRIDs, GRID, machine learning
EXTENSION of the file: .pdf
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Organizer of the Session:
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IP ADDRESS: 193.77.81.82

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Transactions: WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS
Transactions ID Number: 28-828
Full Name: Amel Ferial Boudjabi
Position: Lecturer
Age: ON
Sex: Female
Address: department of Mechanics,University Larbi Ben M'hidi of Oum El Bouaghi
Country: ALGERIA
Tel: +213661719490
Tel prefix: +21332491714
Fax: +21332421036
E-mail address: boudjabi_af@yahoo.fr
Other E-mails: boudjabi.af@gmail.com
Title of the Paper: physical modelling of a continuous casting tundish a parametric study of residence time distribution curves
Authors as they appear in the Paper: Amel Férial Boudjabi,Ahmed Bellaouar,Mohammed Lachi,Christian Dumortier
Email addresses of all the authors: boudjabi_af@yahoo.fr,ahmed_bellaouar@yahoo.fr,mohammed.lachi@univ-reims.fr,christian.dumortier@fpms.ac.be
Number of paper pages: 10
Abstract: More than 94% steelmaking and ironmaking are released in continuous casting process. Product quality is closely related to metal cleanness and non-metallic inclusions removal. So, lliquid metal flow in ladles, tundishes and moulds is recognised to be of great importance in the quality of these products. The metal jet from the ladle to tundish tends to induce turbulent motions which can play important roles in non-metallic inclusions removal at the slag surface, thereby helping in the production of cleaner steel. To improve particle decantation, flow control devices such as dams and weirs are used. The present work is an experimental study released using similarity criteria, through Reynolds and Froude numbers. A reduced scale (1/4) water model of an industrial tundish is used to visualise and measure different parameters of a tracer flow injected in water. The analysis of residence time distribution curves (RTD) by the combined model for different configurations !
is carried out to establish the interest of placing weirs in the amelioration of inclusions flotation and decantation
Keywords: Continuous Casting,Inclusions Decantation,Similarity Criteria,Water Model,Residence Time,Combined Model.
EXTENSION of the file: .pdf
Special (Invited) Session: Analysis of the residence time distribution RTD curves in a continuous casting tundish water model
Organizer of the Session: 605-227.doc
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IP ADDRESS: 41.201.62.98

Wseas Transactions

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS
Transactions ID Number: 28-827
Full Name: Amel Boudjabi
Position: Lecturer
Age: ON
Sex: Female
Address: department of Mechanics,University Larbi Ben M'hidi of Oum El Bouaghi
Country: ALGERIA
Tel: +213661719490
Tel prefix: +21332491714
Fax: +21332421036
E-mail address: boudjabi_af@yahoo.fr
Other E-mails: boudjabi.af@gmail.com
Title of the Paper: physical modelling of a continuous casting tundish a parametric study of residence time distribution curves
Authors as they appear in the Paper: Amel Férial Boudjabi,Ahmed Bellaouar,Mohammed Lachi,Christian Dumortier
Email addresses of all the authors: boudjabi_af@yahoo.fr,ahmed_bellaouar@yahoo.fr,mohammed.lachi@univ-reims.fr,christian.dumortier@fpms.ac.be
Number of paper pages: 10
Abstract: More than 94% steelmaking and ironmaking are released in continuous casting process. Product quality is closely related to metal cleanness and non-metallic inclusions removal. So, lliquid metal flow in ladles, tundishes and moulds is recognised to be of great importance in the quality of these products. The metal jet from the ladle to tundish tends to induce turbulent motions which can play important roles in non-metallic inclusions removal at the slag surface, thereby helping in the production of cleaner steel. To improve particle decantation, flow control devices such as dams and weirs are used. The present work is an experimental study released using similarity criteria, through Reynolds and Froude numbers. A reduced scale (1/4) water model of an industrial tundish is used to visualise and measure different parameters of a tracer flow injected in water. The analysis of residence time distribution curves (RTD) by the combined model for different configurations !
is carried out to establish the interest of placing weirs in the amelioration of inclusions flotation and decantation
Keywords: Continuous Casting ,Inclusions Decantation,Similarity Criteria,Residence Time,Combined Model
EXTENSION of the file: .doc
Special (Invited) Session: Analysis of the residence time distribution RTD curves in a continuous casting tundish water model
Organizer of the Session: 605-227.doc
How Did you learn about congress:
IP ADDRESS: 41.201.62.98

Friday 30 January 2009

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 28-795
Full Name: Daniel Hunyadi
Position: Lecturer
Age: ON
Sex: Male
Address: Sibiu, Siretului Street, No. 7, Ap. 37
Country: ROMANIA
Tel: 0040 724576753
Tel prefix:
Fax:
E-mail address: daniel.hunyadi@ulbsibiu.ro
Other E-mails: danyhunyadi@yahoo.com
Title of the Paper: a global model for virtual educational system
Authors as they appear in the Paper: Daniel Hunyadi, Iulian Pah, Dan Chiribuca
Email addresses of all the authors: daniel.hunyadi@ulbsibiu.ro,i_pah@yahoo.com,dchiribuca@socasis.ubbcluj.ro
Number of paper pages: 10
Abstract: This paper present a virtual educational environment model which makes learning easier by using collaboration (and extension, team-research model) as a form of social interplay. The model represents a universe where human agents interact with artificial agents (software agents). Considering the vision of the system, it can be classified among advanced systems for it is client-oriented (student) and provides value added educational services, due to the collaborative learning attribute. The model proposes an original architecture where elements of the socio-cultural theory of collaborative learning are assigned to the artificial intelligence components (the multi-agent system). The expected results are: conceptual models (agents, learning and teaching strategies, student profiles and group profiles, communication between agents, negotiation strategies and coalition formation), software entities, and a methodology to evaluate the performance of eLearning systems.
Keywords: socio-cultural models, multi-agent system, multi-agent architectures, collaborative learning, artificial agents, computer-based learning, distance learning
EXTENSION of the file: .pdf
Special (Invited) Session: Socio-cultural models implementedthrough multi-agent architecture
Organizer of the Session: 603-317
How Did you learn about congress:
IP ADDRESS: 84.232.153.242

Thursday 29 January 2009

Wseas Transactions

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 32-183
Full Name: Kishor Porate
Position: Assistant Professor
Age: ON
Sex: Male
Address: G.H.Raisoni College of Engineering, CRPF Gate No. 3, Digdoh Hills, Hingna Road, Nagpur
Country: INDIA
Tel: 2284662
Tel prefix: +91-712
Fax: +91-7104-232560
E-mail address: kporate@yahoo.com
Other E-mails: gl_bodhe@neeri.res.in
Title of the Paper: Distributed FACT Controllers as an Effective Tool for Reduction in Environmental pollution due to Thermal Power Plant
Authors as they appear in the Paper: Kishor Porate, K.L.Thakre, G.L.Bodhe
Email addresses of all the authors: kporate@yahoo.com,k_thakre@yahoo.com,gl_bodhe@neeri.res.in
Number of paper pages: 10
Abstract: Flexible AC Transmission (FACTS) devices are installed in the transmission network to divert the power flow, minimize the power losses and to improve the line performance but it has limitations and drawbacks. Distributed Flexible AC Transmission (D-FACTS) is a new concept over FACTS devices, to improve the security, reliability of the network in economic manner. This paper gives the concept of D-FACTS technology for saving of electrical energy, minimization of losses, reduction of coal consumption and environmental pollution from coal based thermal power plants. Concept of the paper also deals with thermal generation at minimum pollution level and economics for savings. Analysis also deals with computer simulation for reactance's and equivalent voltages required for injection in the transmission line, number of distributed modules per conductor per kilometre. System details are presented in the paper along with simulation results.
Keywords: Distributed series compensator, D-Facts, Facts, Electrical energy saving, Coal economics, Environmental pollution
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: Mrs. R.M.Mahurkar, G.H.Raisoni College of Engineering, Nagpur, India, R_mahurkar@yahoo.co.in
IP ADDRESS: 124.124.208.34

Wseas Transactions

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 32-182
Full Name: Kun-Ching Wang
Position: Assistant Professor
Age: ON
Sex: Male
Address: No. 200, University Rd, Neimen Shiang, Kaohsiung, Taiwan, 845, R.O.C
Country: TAIWAN
Tel:
Tel prefix:
Fax:
E-mail address: kunching@mail.kh.usc.edu.tw
Other E-mails: wkc0224@seed.net.tw
Title of the Paper: Speech Detection Based on Entropy Measure for Variable Noise-Level in Cars
Authors as they appear in the Paper:
Email addresses of all the authors:
Number of paper pages: 10
Abstract: The goal of this study focuses on the presence of a robust method for speech detection (SPD). A robust SPD is essential part of speech recognition in non-stationary backgrounds such as in cars. It is shown that the inherent nature of banded structures appears only on speech-activity spectrogram and is robust against various types of noises. Consequently, a robust acoustic feature, namely band-splitting spectral entropy (BSE) parameter, is then proposed here. By use of the band decomposition, the banded structures are explicated more efficiently. To make the BSE parameter insensitive to colored noise such as car noise, the weighted average based noise estimator being used for tracking noise variation where the BSE decision is as an indicator of updating noise power is utilized. Experimental results show that the proposed SPD is robust against variable noise-level in cars.
Keywords: speech detection, spectral entropy, band-splitting
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress:
IP ADDRESS: 123.204.152.235

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 32-181
Full Name: Kun-Ching Wang
Position: Assistant Professor
Age: ON
Sex: Male
Address: No. 200, University Rd, Neimen Shiang, Kaohsiung, Taiwan, 845, R.O.C
Country: TAIWAN
Tel:
Tel prefix:
Fax:
E-mail address: kunching@mail.kh.usc.edu.tw
Other E-mails: wkc0224@seed.net.tw
Title of the Paper: Speech Detection Based on Entropy Measure for Variable Noise-Level in Cars
Authors as they appear in the Paper:
Email addresses of all the authors:
Number of paper pages: 10
Abstract: The goal of this study focuses on the presence of a robust method for speech detection (SPD). A robust SPD is essential part of speech recognition in non-stationary backgrounds such as in cars. It is shown that the inherent nature of banded structures appears only on speech-activity spectrogram and is robust against various types of noises. Consequently, a robust acoustic feature, namely band-splitting spectral entropy (BSE) parameter, is then proposed here. By use of the band decomposition, the banded structures are explicated more efficiently. To make the BSE parameter insensitive to colored noise such as car noise, the weighted average based noise estimator being used for tracking noise variation where the BSE decision is as an indicator of updating noise power is utilized. Experimental results show that the proposed SPD is robust against variable noise-level in cars.
Keywords: speech detection, spectral entropy, band-splitting
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress:
IP ADDRESS: 123.204.152.235

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON SIGNAL PROCESSING
Transactions ID Number: 32-180
Full Name: Konstantinos Karantzalos
Position: Doctor (Researcher)
Age: ON
Sex: Male
Address: Iroon Polytexniou 9, 15780, Zografou Campus, Athens
Country: GREECE
Tel:
Tel prefix:
Fax:
E-mail address: karank@central.ntua.gr
Other E-mails:
Title of the Paper: Anisotropic Morphological Levelings
Authors as they appear in the Paper: Konstantinos Karantzalos, Demetre Argialas and Andreas Georgopoulos
Email addresses of all the authors: karank@central.ntua.gr, d.argialas@central.ntua.gr, a.georgopoulos@central.ntua.gr
Number of paper pages: 14
Abstract: Edge preserving smoothing and image simplification is of fundamental importance in a variety of image processing and vision applications during feature extraction and object detection procedures. The construction of an optimal pre-processing filtering tool for edge detection and segmentation tasks is still an open matter. Towards this end, this paper introduces Anisotropic Morphological Levelings (AML), an advancement of the classical levelings which incorporate during its computation anisotropic diffused markers. The evaluation of the proposed scheme was carried out both by qualitative and quantitative assessment. Experimental results demonstrated that the developed AML generated an effective pre-processing tool for noise removal, corner detection and segmentation.
Keywords: Enhancement, Smoothing, Simplification, Feature extraction, Object detection, Filtering, Scale space
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress:
IP ADDRESS: 62.103.103.73

Wseas Transactions

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 28-794
Full Name: Jose Fidalgo
Position: Assistant Professor
Age: ON
Sex: Male
Address: Rua Dr. Roberto Frias, s/n 4200-465 Porto
Country: PORTUGAL
Tel: 225083370
Tel prefix: +351
Fax: +351225081440
E-mail address: jfidalgo@inescporto.pt
Other E-mails: jfidalgo@fe.up.pt
Title of the Paper: Estimation of Load Diagrams in MV/LV Substations
Authors as they appear in the Paper: J. N. Fidalgo
Email addresses of all the authors: jfidalgo@inescporto.pt
Number of paper pages: 10
Abstract: Efficient power systems planning and exploration require the estimation of load diagrams at the different levels of the distribution networks. In particular, the planning of new MV/LV substations requires the assessment of their expected load curves under different exploration scenarios. The deregulation process and environment preservation constraints also compel the need of higher efficiency levels in network investments. This paper describes the methodologies adopted for the estimation of load curve diagrams in MV/LV substations. The assessment process is based on billing data (monthly energy consumption, hired power contracts, activity codes and weekday type), which is the unique information generally available at this level of the network. The most common approaches use measurements in typical classes of consumers defined by experts to construct inference engines that, most of the times, only estimate peak loads. In this paper, two different approaches are te!
sted. The first one is based on the definition of classes using a clustering algorithm and uses Artificial Neural Networks (ANN) for the estimation of the MV/LV substation load curve. In the second one, an ANN is trained to output directly the load diagram estimated for each individual consumer. This article describes the adopted methodologies and presents some representative results. Performance attained is discussed as well as a method to achieve confidence intervals.
Keywords: Load estimation, Clustering, Artificial neural networks, Distribution networks
EXTENSION of the file: .pdf
Special (Invited) Session: Load Curve Estimation For Distribution Systems Using ANN
Organizer of the Session: 605-503
How Did you learn about congress: Joao Paulo Saraiva (jsaraiva@fe.up.pt)
IP ADDRESS: 193.136.33.149

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 28-793
Full Name: Maricel Adam
Position: Professor
Age: ON
Sex: Male
Address: Faculty of Electrical Engineering, "Gh. Asachi" Technical University of Iasi
Country: ROMANIA
Tel: 232278683
Tel prefix: 0040
Fax: 232211667
E-mail address: adamm@ee.tuiasi.ro
Other E-mails: adam_maricel05@yahoo.fr
Title of the Paper: The analysis of circuit breakers kinematics characteristics using the artificial neural networks
Authors as they appear in the Paper: Maricel Adam, Adrian Baraboi, Catalin Pancu, Sorin Pispiris
Email addresses of all the authors: adamm@ee.tuiasi.ro, abaraboi@ee.tuiasi.ro, cpancu@ee.tuiasi.ro, cristian.Pispiris@transelectrica.ro
Number of paper pages: 10
Abstract: The paper presents the required parameters in the evaluation of the technical state for the High Voltage (HV) circuit breakers. It details some aspects regarding the influence of the kinematics characteristics to the circuit breakers performances. Also, it presents a possibility to use the artificial neural networks (ANN) in the analysis of the circuit breakers kinematics characteristics, in order to diagnostic their technical state. The required database necessary for learning of ANN has determined through the modelling of the mechanical system of movement transmission, using the systems of electrical nature, with RLC elements.
Keywords: Circuit breaker, Kinematics characteristics, Modelling and simulation, Monitoring, Diagnostic, Artificial neural network
EXTENSION of the file: .pdf
Special (Invited) Session: New approach regarding the kinematics characteristics analysis of circuit breakers
Organizer of the Session: 603-200
How Did you learn about congress:
IP ADDRESS: 81.180.223.106

Wednesday 28 January 2009

Wseas Transactions

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 32-179
Full Name: Kannaiah Sathish Kumar
Position: Assistant Professor
Age: ON
Sex: Male
Address: School of Electrical Sciences, VIT University, Vellore-632014.TamilNadu
Country: INDIA
Tel: 04162202413
Tel prefix: +91
Fax: 04162243092
E-mail address: k_sathishkr@sify.com
Other E-mails: kansathh@rediffmail.com,kansathh21@yahoo.co.in
Title of the Paper: Optimal Power System Reconfiguration in Distribution Circuit using Brute Force Attack Algorithm
Authors as they appear in the Paper: K Sathish Kumar T Jayabarathi
Email addresses of all the authors: k_sathishkr@sify.com,tjayabarathi@vit.ac.in
Number of paper pages: 10
Abstract: This paper approaches the problem of restoring a faulted area in an electric power distribution system after locating and isolating the faulted block and reconfiguring the system. Through this paper we are going to explain the power system restoration technique using brute-force attack method (BFAM) and binary particle swarm optimization (BPSO). This is a technique based on the possible combination in mathematical analysis which is explained in the introduction. After isolating the fault, main concentration will be towards the reconfiguration of the restored system using BPSO. In power system if a node has fault than its near-by agents will make all the possible combination with the near-by node starting(1st) to end(nth) and then will go up to the end load and the best solution path out of these combination will be used for the restoration. Main advantage of this method is that it will give the 100% efficient result for the restoration of node considering the powe!
r availability of the feeders. Here due to fault in the system near-by agent will be affected and become useless and will go in the non-working mode. Now in order to restore these near-by loads we will give a new connection called NO (Normally Open). These connections work in such a way so that the switch will be in open state as long as there is no fault. But it will close with the load of near-by feeder as soon as fault is there and they will restore the system by taking the only available power (extra power) from the feeder through bus connection. After restoration using the BFAM, the BPSO will be used in order to provide the stable configuration. The output of the BFAM will be used as input for the BPSO and then we will reconfigure our system in order to provide the stable configuration. The effectiveness of the proposed BFAM and BPSO is demonstrated by simulating tests in a proposed distribution network and verified the results using the Matlab and C programming.
Keywords: Power System Restoration, Reconfiguration, Radial Structure, Load Balancing Index, BPSO and BFAM
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: Dr.V.M.Chandrasekaran, Professor In-charge, VIT University.Vellore-632014.Tamilnadu.India.E-mail:vmcsn@vit.ac.in
IP ADDRESS: 220.225.214.2

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Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 28-792
Full Name: Saemah Rahman
Position: Senior Lecturer
Age: ON
Sex: Female
Address: Faculty of Education, Universiti Kebangsaan Malaysia
Country: MALAYSIA
Tel: +6019-2675055
Tel prefix:
Fax: +603-89254372
E-mail address: saemahukm@yahoo.com
Other E-mails: saemah@pkrisc.cc.ukm.my
Title of the Paper: The Development of METAKU to Support Learning in Hypermedia Environment
Authors as they appear in the Paper: Saemah Rahman, Siti Fatimah Mohd Yassin & Normahdiah Sheik Said
Email addresses of all the authors: saemahukm@yahoo.com, sitifatimahmy@gmail.com, norma@fbmk.upm.edu.my
Number of paper pages: 11
Abstract: The development of learning skills is not given attention in many classrooms in all levels of education in our education system today. We assume that students will be able to develop their own learning skills. The challenges students face in hypermedia learning environment need to be considered to help them learn effectively in this type of learning environment. METAKU is developed to assist students to apply metacognitive learning strategies, that is, planning, monitoring and evaluation during the learning process in hypermedia learning environment. This paper discusses the development of METAKU which employed the first three stages of a generic instructional design model - ADDIE which consists of the following stages: 1) Analysis, 2) Design, 3) Development, 4) Implementation and 5) Evaluation. In the analysis stage, the data was collected using a triangulation method done concurrently: a survey of student's preference of studying online versus offline; a focus gr!
oup interview to identify challenges they face and strategies they use whilst accessing and studying the hypertext materials; and a record of student's interaction with the computer using captivation software. A total of 240 second year university students in two public universities in Malaysia were involved in this study. The analysis stage provides information for stage 2 and 3 where the data collected was used in formulating the content and design of METAKU. It is hoped that METAKU will be able to help students develop learning skills in hypermedia learning environment.
Keywords: Hypermedia learning environment, METAKU learning strategies, Metacognitive learning strategies, Online study skills
EXTENSION of the file: .doc
Special (Invited) Session: Development of a Web-based METAKU Learning Courseware for Effective Learning in Hypermedia Environment
Organizer of the Session: 603-602
How Did you learn about congress:
IP ADDRESS: 202.185.32.240

Tuesday 27 January 2009

Wseas Transactions

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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-178
Full Name: Muhammad Akber Farooqui
Position: Engineer
Age: ON
Sex: Male
Address: B-653 Block 13 Federal.B.Area
Country: PAKISTAN
Tel: 923222505900
Tel prefix: 0
Fax: 0
E-mail address: afarooqui2000@hotmail.com
Other E-mails: akbar.farooqui@atlasbank.com.pk
Title of the Paper: Protocol Design Issues in WLAN
Authors as they appear in the Paper: Muhammad Akber Farooqui
Email addresses of all the authors: afarooqui2000@hotmail.com
Number of paper pages: 10
Abstract: IEEE 802.11 wireless LAN (WLAN) is the most widely used WLAN standard today, but it cannot provide QoS support for the increasing number of multimedia applications. Thus, a large number of 802.11 QoS enhancement schemes have been proposed, each one is focusing on a particular mode. This work summarizes all these schemes and presents current research activities. First, we analyze the QoS limitations of IEEE 802.11 wireless MAC layers. Then, different QoS enhancement techniques proposed for 802.11 WLAN are described and classified along with their advantages/drawbacks. Finally, the upcoming IEEE 802.11e QoS enhancement standard is introduced and studied in detail. We are proposing in this work to adapt the concept of Quality of Service (QoS) issues in wireless LAN scenario. A deep comparative analysis has been done with leader based schemes and results have been verified using OPNET simulator.
Keywords: Ieee 802.11, Wireless LAN (WLAN), Quality of Service (QoS), Medium Access Control (MAC), 802.11e
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress:
IP ADDRESS: 202.61.40.138

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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-177
Full Name: Muhammad Akber Farooqui
Position: Engineer
Age: ON
Sex: Male
Address: B-653 Block 13 Federal.B.Area
Country: PAKISTAN
Tel: 923222505900
Tel prefix: 0
Fax: 0
E-mail address: afarooqui2000@hotmail.com
Other E-mails: akbar.farooqui@atlasbank.com.pk
Title of the Paper: Protocol Design Issues in WLAN
Authors as they appear in the Paper: Muhammad Akber Farooqui
Email addresses of all the authors: afarooqui2000@hotmail.com
Number of paper pages: 10
Abstract: IEEE 802.11 wireless LAN (WLAN) is the most widely used WLAN standard today, but it cannot provide QoS support for the increasing number of multimedia applications. Thus, a large number of 802.11 QoS enhancement schemes have been proposed, each one is focusing on a particular mode. This work summarizes all these schemes and presents current research activities. First, we analyze the QoS limitations of IEEE 802.11 wireless MAC layers. Then, different QoS enhancement techniques proposed for 802.11 WLAN are described and classified along with their advantages/drawbacks. Finally, the upcoming IEEE 802.11e QoS enhancement standard is introduced and studied in detail. We are proposing in this work to adapt the concept of Quality of Service (QoS) issues in wireless LAN scenario. A deep comparative analysis has been done with leader based schemes and results have been verified using OPNET simulator.
Keywords: Ieee 802.11, Wireless LAN (WLAN), Quality of Service (QoS), Medium Access Control (MAC), 802.11e
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress:
IP ADDRESS: 202.61.40.138

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The following information was submitted:

Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-176
Full Name: Muhammad Akber Farooqui
Position: Engineer
Age: ON
Sex: Male
Address: B-653 Block 13 Federal.B.Area
Country: PAKISTAN
Tel: 923222505900
Tel prefix: 0
Fax: 0
E-mail address: afarooqui2000@hotmail.com
Other E-mails: akbar.farooqui@atlasbank.com.pk
Title of the Paper: Protocol Design Issues in WLAN
Authors as they appear in the Paper: Muhammad Akber Farooqui
Email addresses of all the authors: afarooqui2000@hotmail.com
Number of paper pages: 10
Abstract: IEEE 802.11 wireless LAN (WLAN) is the most widely used WLAN standard today, but it cannot provide QoS support for the increasing number of multimedia applications. Thus, a large number of 802.11 QoS enhancement schemes have been proposed, each one is focusing on a particular mode. This work summarizes all these schemes and presents current research activities. First, we analyze the QoS limitations of IEEE 802.11 wireless MAC layers. Then, different QoS enhancement techniques proposed for 802.11 WLAN are described and classified along with their advantages/drawbacks. Finally, the upcoming IEEE 802.11e QoS enhancement standard is introduced and studied in detail. We are proposing in this work to adapt the concept of Quality of Service (QoS) issues in wireless LAN scenario. A deep comparative analysis has been done with leader based schemes and results have been verified using OPNET simulator.
Keywords: IEEE 802.11, Wireless LAN (WLAN), Quality of Service (QoS), Medium Access Control (MAC), 802.11e
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IP ADDRESS: 202.61.40.138

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Transactions: WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE
Transactions ID Number: 32-175
Full Name: Sudesh Sivarasu
Position: Assistant Professor
Age: ON
Sex: Male
Address: Biomedical Engineering Division, School of Biotechnology, Chemical & Biomedical Engineering
Country: INDIA
Tel: 9789137970
Tel prefix: +91
Fax:
E-mail address: sudeshsivarasu@yahoo.co.in
Other E-mails: biomedicalsudesh@yahoo.com
Title of the Paper: Artificial Knee Implant Design Parameters Affecting the Range Of Motion Improvement after the Total Knee Arthroplasty
Authors as they appear in the Paper: Sudesh Sivarasu & Lazar Mathew
Email addresses of all the authors: sudeshsivarasu@yahoo.co.in, lazarmathewt@gmail.com
Number of paper pages: 12
Abstract: Total Knee Arthroplasty has been the end time surgical procedure for pain relief and movement restoration in cases of severe arthritis. The Knee implant design plays a vital role in the deciding the activity levels of a patient after total knee replacement. 90 percent of younger patients undergoing the knee replacement surgeries, the restriction is not from the subject but from the implant design. This paper discusses parameters affecting the activity levels after total knee replacement. The paper also briefs the design aspects of a novel knee design which allows the normal high flexion activity even after total knee replacement.
Keywords: Knee arthritis, Total knee arthroplasty, Design, 3D Modelling, Simulation
EXTENSION of the file: .doc
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: The Librarian, Central Library, VIT Unviersity, Vellore, India - 632014
IP ADDRESS: 202.47.127.27

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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-174
Full Name: Stefan Panic
Position: Assistant
Age: ON
Sex: Male
Address: Aleksandra medvedeva 14, 1800 Nis, Serbia
Country: YUGOSLAVIA
Tel: +38163470649
Tel prefix:
Fax:
E-mail address: stefanpnc@yahoo.com
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Title of the Paper: Selection Combining Receiver in the Presence of Ricean fading
Authors as they appear in the Paper: Petar Spalevic, Mihajlo Stefanovic, Dusan Stefanovic, Stefan Panic
Email addresses of all the authors: petarspalevic@yahoo.com; mihajlo.stefanovic@elfak.ni.ac.yu; dusan.stefanovic@itcentar.co.yu; stefanpnc@yahoo.com
Number of paper pages: 10
Abstract: This paper focuses on comparing performances of the selection combining (SC) diversity system in the presence of independent and correlated Ricean fading. For the case of correlated fading, we have presented closed form expressions for probability density function (PDF), and cumulative density function (CDF), at the output of dual branch SC. Also we have presented closed form expressions for system performances such as: average bit error-rate (ABER), outage probability (OP) and average output moments, which is the main contribution of our work. For the case of independent fading between the diversity branches, we have analyzed performances of SC diversity system which consists of two and four input branches. All obtained results are graphically presented.
Keywords: Ricean fading, Selection combining, System performances
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IP ADDRESS: 160.99.38.140

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Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 32-173
Full Name: Rerkchai Fooprateepsiri
Position: Assistant Professor
Age: ON
Sex: Male
Address: 51 Cheusampan rd., Nongchok, bangkok
Country: THAILAND
Tel: +6629883666
Tel prefix:
Fax:
E-mail address: rerkchai@mut.ac.th
Other E-mails: king_arter@hotmail.com
Title of the Paper: A Hybrid Method for Face Recognition Systems
Authors as they appear in the Paper: Rerkchai Fooprateepsiri, Werasak Kurutach
Email addresses of all the authors: rerkchai@mut.ac.th, king_arter@hotmail.com
Number of paper pages: 10
Abstract: This paper proposes a highly robust method for face recognition and authentication. Techniques introduced in this work are composed of two stages. First, the feature of face is to be detected by the combined of Trace Transform and Fast Active Contour. Then, in the second stage, the Hausdorff distance and Modified Shape Context are employed to measure and determine of similarity between models and test images. Our system is evaluated with experiments on the AR, ORL and Yale face database using 1,126 face images. From experimental result, it is show that the average of accuracy rate is higher than 84%.
Keywords: Face Recognition, Trace Transform, Hausdorff distance, Modified Shape context, Active Contour.
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IP ADDRESS: 116.58.239.236

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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 32-172
Full Name: ss ss
Position: Professor
Age: ON
Sex: Male
Address: ss
Country: BOTSWANA
Tel: ss
Tel prefix:
Fax:
E-mail address: rerkchai@mut.ac.th
Other E-mails: rerkchai@mut.ac.th
Title of the Paper: dd
Authors as they appear in the Paper: dd
Email addresses of all the authors: dd
Number of paper pages: 10
Abstract: ddddddddddddddd
Keywords: ddd
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IP ADDRESS: 116.58.231.242

Monday 26 January 2009

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Transactions: WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE
Transactions ID Number: 28-791
Full Name: Nicu George Bizdoaca
Position: Professor
Age: ON
Sex: Male
Address: 107 Decebal Bv., Craiova, 200440
Country: ROMANIA
Tel:
Tel prefix:
Fax:
E-mail address: nicu@robotics.ucv.ro
Other E-mails: apetrisor06@gmail.com
Title of the Paper: Modular Adaptive Bionics Structure
Authors as they appear in the Paper: Nicu George Bîzdoaca , Dan Tarnita, Daniela Tarnita, Anca Petrisor, Elvira Bîzdoaca
Email addresses of all the authors: nicu@robotics.ucv.ro, dantarnita@yahoo.com, dtarnita@yahoo.com, apetrisor@em.ucv.ro, elviranicoleta@yahoo.com
Number of paper pages: 10
Abstract: Applications of biological methods and systems found in nature to the study and design of engineering systems and modern technology are defined as BIONICS. The present paper describes a bionics application of shape memory alloy in construction of orthopedic implant. The main idea of this paper is related to design modular adaptive implants for fractured bones. In order to target the efficiency of medical treatment, the implant has to protect the fractured bone, for the healing period, undertaking much as is possible from the daily usual load of the healthy bones. After a particular stage of healing period is passed, using implant modularity, the load is gradually transferred to bone, assuring in this manner a gradually recover of bone function. The adaptability of this design is related to medical possibility of the doctor to made the implant to correspond to patient specifically anatomy. Using a CT realistic numerical bone models, the mechanical simulation of diff!
erent types of loading of the fractured bones treated with conventional method are presented. The results are commented and conclusions are formulated.
Keywords: Bionics, Modularity, Implants, Numerical simulation, Shape memory alloy
EXTENSION of the file: .pdf
Special (Invited) Session: Shape memory alloy based Modular Adaptive Orthopedic Implants
Organizer of the Session: 595-606
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IP ADDRESS: 86.126.92.150

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Transactions: WSEAS TRANSACTIONS ON FLUID MECHANICS
Transactions ID Number: 28-790
Full Name: Asu Ýnan
Position: Assistant Professor
Age: ON
Sex: Female
Address: Gazi University Institute Science & Technology Environmental & Technical Research of Accidents Department 06570 Maltepe/ Ankara
Country: TURKEY
Tel: 5821259
Tel prefix: +90312
Fax: 2323226
E-mail address: asuinan@gazi.edu.tr
Other E-mails: asuinan@gmail.com
Title of the Paper: numerical modeling of extended mild slope equation with modified mac cormack method
Authors as they appear in the Paper: Asu Ýnan,Lale balas
Email addresses of all the authors: asuinan@gazi.edu.tr,lalebal@gazi.edu.tr
Number of paper pages: 10
Abstract: The transformation of waves is one of the important subjects in coastal engineering studies. Refraction, diffraction, shoaling, reflection can be analysed with the mild slope equation over mild sloped topographies. But the extended mild slope equation can be applied to the rapidly varying topographies since it includes higher order bottom effects such as square of bottom slope and bottom curvature. In this study, extended mild slope equation has been solved with finite difference method using Mac Cormack and Point Gauss Seidel Methods together. The nonlinear wave celerity and group velocity have been used. The numerical model has been tested on elliptic shoaling area and compared with the physical experiment measurements given in literature. The predictions are in consistency with the measurements. As a result of error analysis, it is decided that the numerical can be used for the simulation of wave propagation. Numerical model has been applied to a coastal area in!
the Kocaeli Bay in the Marmara Sea in Turkey.
Keywords: Extended mild slope equation, Mac Cormack Method, Point Gauss Seidel Method, Wave refraction, Diffraction, Finite difference method, CFD
EXTENSION of the file: .pdf
Special (Invited) Session: numerical modeling of extended mild slope equation with mac cormack method
Organizer of the Session: 609-552
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IP ADDRESS: 194.27.14.182

Sunday 25 January 2009

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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-171
Full Name: Lamia Chaari
Position: Associate Professor
Age: ON
Sex: Female
Address: route mahdia cité elomran rue nassim N° 46 elbosten sfax
Country: TUNISIA
Tel: (+216)97589752
Tel prefix:
Fax:
E-mail address: lamia.chaari@tunet.tn
Other E-mails: lamia.chaari@enis.rnu.tn
Title of the Paper: An adaptive coded modulation with multi-levels QoS analysis in multimedia environment
Authors as they appear in the Paper: Lamia Chaari, Mohamed Fourati, Nouri Masmoudi, Lotfi Kamoun
Email addresses of all the authors: lamia.chaari@tunet.tn,fourati@tunet.tn,lotfi.kamoun@isecs.rnu.tn
Number of paper pages: 10
Abstract: This article proposes an adaptive coded modulation (ACM) with multi-levels qualities of service analysis, which can be used to perform physical layer functions in software radio receivers for beyond third generation systems. ACM approche employs multiple coding and modulation schemes in order to adapt instantaneously spectral efficiency to the signal-to-noise ratio variations SNR. The idea is to study transmission schemes performance which allow dynamic bandwidth sharing among various services in multimedia mobile and wireless networks in different channel environments. The aim is to select the appropriate modulation and channel coding modes based on signal quality measurement via a decision feedback block (DFB). Decision taken by the DFB block is based on different QoS parameters that depend in class and type of multimedia traffic. The DBF block is introduced in order to mitigate the channel quality fluctuations. The channel coded adaptive modulation schemes can !
be viewed as a lower complexity alternative of mitigating the channel quality fluctuations in comparison to multiple-transmitter and multiple-receiver. Implementing DFB necessitate to simulate and analyze different combinations between modulation and channel coding blocs for different data types.
Keywords: Channel coding, adaptive modulation, Signaling, image, Multimedia, SDR
EXTENSION of the file: .doc
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IP ADDRESS: 196.203.56.153

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Transactions: WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS
Transactions ID Number: 32-170
Full Name: MOURAD YKHLEF
Position: Assistant Professor
Age: ON
Sex: Male
Address: King Saud University, P.O. Box 51178 Riyadh
Country: SAUDI ARABIA
Tel:
Tel prefix:
Fax:
E-mail address: ykhlef@ccis.ksu.edu.sa
Other E-mails: ykhlef@yahoo.fr
Title of the Paper: A Survey of a family of Recursive Query Languages for XML Data
Authors as they appear in the Paper: Mourad Ykhlef
Email addresses of all the authors: ykhlef@ccis.ksu.edu.sa
Number of paper pages: 10
Abstract: XML data are data whose structure is not necessary constrained by a schema. XML is fast emerging as the dominant standard for information exchange on the World Wide Web. The ability to intelligently query XML data becomes increasingly important. Several query languages are proposed in the literature, they are mainly different in the underlying model and in the power of expression. In this article we present and compare a family of recursive query languages for querying and restructuring XML data.
Keywords: XNL,, Graph, Tree, Embedding, GROUP BY, Fixpoint, (Structural) recursion
EXTENSION of the file: .pdf
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IP ADDRESS: 213.166.155.110

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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 32-169
Full Name: gc fdv
Position: Engineer
Age: ON
Sex: Male
Address: fvxdx
Country: IRAN
Tel:
Tel prefix:
Fax:
E-mail address: fdv@yahoo.com
Other E-mails:
Title of the Paper: vgfbdfg
Authors as they appear in the Paper:
Email addresses of all the authors:
Number of paper pages: 10
Abstract: fgdv bvv fd fgbd
Keywords: dfvg fgxdfg fgdvg gvfdx
EXTENSION of the file: .pdf
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IP ADDRESS: 217.174.18.13

Saturday 24 January 2009

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Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 32-168
Full Name: Prabhakar Karthikeyan
Position: Assistant Professor
Age: ON
Sex: Male
Address: school of electrical sciences, VIT, Vellore, Tamil Nadu
Country: INDIA
Tel: +919894610689
Tel prefix:
Fax:
E-mail address: spk25in@yahoo.co.in
Other E-mails: spk25in@gmail.com,sprabhakarkarthikeya@vit.ac.in
Title of the Paper: Security Constrained Unit Commitment Problem with Operational, Power Flow and Environmental Constraints
Authors as they appear in the Paper: S.Prabhakar karthikeyan, K.Palanisamy, C.Rani, I.Jacob Raglend, D.P.Kothari
Email addresses of all the authors: spk25in@yahoo.co.in,kpalanisamy79@gmail.com,crani@vit.ac.in,jacobraglend@rediffmail.com,vc@vit.ac.in
Number of paper pages: 14
Abstract: An algorithm to solve unit commitment problem (UCP) with operational, power flow and environmental constraints under contingencies has been developed to plan an economic and secure generation schedule. The unit commitment (UC) solution for the environmental constrained problem has been formulated as a multi-objective problem by considering both Economic load dispatch (ELD) and Economic emission dispatch (EED) simultaneously. The combined economic emission dispatch (CEED) bi-objective problem is converted to single objective function by adding a modified price penalty factor. The UCP solutions without operational and power flow constraints are not practical due to secure operation of the power system network. This proposed algorithm introduces an efficient UC approach that obtains the minimum operating cost satisfying both unit and network constraints when contingencies are included. Repeated OPF for the satisfactory unit combinations for every line removal under th!
e given study period has been carried out to obtain UC solutions with both operational, power flow and environmental constraints. This proposed algorithm has been tested on IEEE 14, 30, 57, 118 buses and practical Indian utility systems. The solutions obtained are quite encouraging and useful in the economic emission environment. The algorithm and simulation are carried through Matlab environment.
Keywords: Combined economic emission dispatch, Contingency Analysis, Dynamic Programming, Economic dispatch, Lagrangian multiplier, Newton Raphson, Optimal power flow, Price penalty factor, Unit commitment
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: Professor - In-Charge (Library)/ Dr.V.M.Chandrasekaran/ vmcsn@vit.ac.in,library@vit.ac.in
IP ADDRESS: 220.225.214.2

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Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 28-789
Full Name: HESSA ALJERAN
Position: Lecturer
Age: ON
Sex: Female
Address: Public Authority for Applied Education and Training Applied Science
Country: KUWAIT
Tel: 99071773
Tel prefix: 00965
Fax: 00965-22560444
E-mail address: mfoan_hhh@yahoo.com
Other E-mails: ho.aljiran@paaet.edu.kw
Title of the Paper: Intensity of Ultra-Violet Radiation as an indicator of Ozone layer thickness in Troposphere at Gulf Cooperation Council (GCC)
Authors as they appear in the Paper: H. O. Aljeran, A.R. Khan
Email addresses of all the authors: mfoan_hhh@yahoo.com, A.Khan@cfw.kuniv.edu
Number of paper pages: 10
Abstract: Troposphere Ozone layer acts as a shield against all ultraviolet radiation approaching the planet Earth through absorption. It was noticed in mid 80s that ozone layer has thinned on the poles of the planet due to release of man-made substances commonly known as Ozone Depleting Substances, (ODS) into its atmosphere. The consequences of this change are adverse as the harmful radiations reach to the surface of the earth, strongly influencing the crops yield and vegetation. These radiations are major cause of skin cancer that has long exposure to UV radiation. United States Environmental Protection Agency and European Community have imposed strict regulations to curb the emission of ODS and phase out schedules for the manufacture and use of ODS that was specified by Montreal Protocol in 1987. This research program deals with data analysis of ozone layer thickness and measured ultra-violet radiation that have been obtained at an altitude of 8 km from Abu Dhabi Monitorin!
g station. The ozone layer thickness in stratosphere has been correlated with measured ultraviolet radiation above the Gulf Cooperation Council (GCC). The influence of import of ozone depletion substances for the last decade and other factors that strongly affect the ozone layer thickness in stratosphere were discussed in the final report submitted to public. The dependency of ozone layer thickness on ambient pollutant levels is discussed in detail.
Keywords: Troposphere; ultraviolet radiation; Ozone Depleting Substances; Total hydrocarbon compound;
EXTENSION of the file: .doc
Special (Invited) Session: Prediction of ozone layer thickness in troposphere based on continuously measurement of ultra-violet radiation in Gulf Cooperation Council (GCC)
Organizer of the Session: 609-327.doc
How Did you learn about congress: A.Sharif@surrey.ac.uk, aelkamel@uwaterloo.ca
IP ADDRESS: 139.141.172.36

Friday 23 January 2009

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Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 28-788
Full Name: Sevugarathinam S.Muthu Vijaya Pandian
Position: Senior Lecturer
Age: ON
Sex: Male
Address: No.2/24 Meenakhi Illame Subramaniapuram 4th st(main), Karaikudi-02,Tamilnadu, India
Country: INDIA
Tel: 9865259633
Tel prefix: +91-04565228610
Fax: +91-04222604567
E-mail address: ajay_vijay@rediffmail.com
Other E-mails: mvp_78@rediffmail.com
Title of the Paper: An Efficient Particle Swarm Optimization (EPSO) for Economic Dispatch Problems With Transmission Losses for
Authors as they appear in the Paper: S.Muthu Vijaya Pandian , Dr.K.Thanushkodi
Email addresses of all the authors: ajay_vijay@rediffmail.com,thanush_dr@rediffmail.com
Number of paper pages: 10
Abstract: An Efficient Particle Swarm Optimization (EPSO) technique, employed to solve Economic Dispatch (ED) problems including losses in power system is presented in this paper. With practical consideration, ED will have nonsmooth cost functions with equality and inequality constraints that make the problem, a large-scale highly constrained nonlinear optimization problem. The proposed method expands the original PSO to handle a different approach for satisfying those constraints. In this paper, an Efficient Particle Swarm Optimization (EPSO) technique is employed so that faster convergence is obtained for the same results published in IEEE Proceedings. To demonstrate the effectiveness of the proposed method it is being applied to test ED problems, one with smooth and other with non smooth cost functions considering valve-point loading effects. Comparison with other optimization techniques showed the superiority of the proposed EPSO approach and confirmed its potential for!
solving nonlinear economic load dispatch problems with losses
Keywords: Economic load dispatch, Particle swarm optimization, Valve point loading effect
EXTENSION of the file: .pdf
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IP ADDRESS: 124.247.200.200

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Transactions: WSEAS TRANSACTIONS ON SIGNAL PROCESSING
Transactions ID Number: 28-787
Full Name: Teofil Oroian
Position: Lecturer
Age: ON
Sex: Male
Address: Bd. George Cosbuc, no. 81-83, sect. 5, Bucharest
Country: ROMANIA
Tel:
Tel prefix:
Fax:
E-mail address: oroiant@hotmail.com
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Title of the Paper: Bispectral resolution and leakage effect of the indirect bispectrum estimate for different types of 2D window functions
Authors as they appear in the Paper: Teofil-Cristian Oroian, Constantin-Iulian Vizitiu, Florin ªerban
Email addresses of all the authors: oroiant@hotmail.com,iulian_vizitiu@yahoo.com,florin.serban@ascr.ro
Number of paper pages: 10
Abstract: An important practical problem in the area of the higher-order statistical signal processing is to estimate the cumulants and polyspectra of the analyzed signal when a finite sequence of time samples is available. We cannot use the theoretical formula because they are based on the assumption that an infinite sequence of time samples is available, but this is not true in practice. In order to obtain a better estimate for bispectrum of the signal, different types of 2D window functions are used. Also, these windows are investigated in terms of the resolution and leakage effect of the indirect bispectrum estimate.
Keywords: Higher-order statistics, Bispectrum estimation, 2D window functions, Bispectral resolution
EXTENSION of the file: .pdf
Special (Invited) Session: Some considerations about 2D window functions used for bispectrum estimation
Organizer of the Session: 602-422
How Did you learn about congress:
IP ADDRESS: 89.136.134.231

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Transactions: WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE
Transactions ID Number: 32-167
Full Name: Mohd.Farhan Khan
Position: Student
Age: ON
Sex: Male
Address: AL-QARYAH, Street no.1(west), Doharra, Aligarh-202002, U.P.
Country: INDIA
Tel:
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Fax:
E-mail address: farhan7787@rediffmail.com
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Title of the Paper: basics of electronic nose, human motion detection
Authors as they appear in the Paper: Mohd.Farhan Khan, Mr.Anwar Sadat
Email addresses of all the authors: farhan7787@rediffmail.com, anwart7039@rediffmail.com
Number of paper pages: 10
Abstract: Since 1992, research has been conducted to develop technologies, commonly referred to as electronic noses, that could detect and recognize odors and flavors. An electronic nose (e-nose) is a device that identifies the specific components of an odor and analyzes its chemical makeup to identify it. Of all the five senses, olfaction uses the largest part of the brain and is an essential part of our daily lives. Our human nose is elegant, sensitive, and self-repairing, but the E-nose sensors do not fatigue or get the "flu". Further, the E-nose can be sent to detect toxic and otherwise hazardous situations that humans may wish to avoid. An electronic nose can be regarded as a modular system comprising a set of active materials which detect the odour, associated sensors which transduce the chemical quantity into electrical signals, followed by appropriate signal conditioning and processing to classify known odours or identify unknown odours. The signals generated by an a!
rray of odour sensors need to be processed in a sophisticated manner. An odor is composed of molecules, each of which has a specific size and shape. Each of these molecules has a correspondingly sized and shaped receptor in the human nose. When a specific receptor receives a molecule, it sends a signal to the brain and the brain identifies the smell associated with that particular molecule. Electronic noses based on the biological model work in a similar manner, albeit substituting sensors for the receptors, and transmitting the signal to a program for processing, rather than to the brain. Electronic noses are useful in various fields. Currently, the biggest market for electronic noses is the food industry. Environmental applications of electronic noses include analysis of fuel mixtures, detection of oil leaks, testing ground water for odors, and identification of household odors. Potential applications include identification of toxic wastes, air quality monitoring, and mon!
itoring factory emissions. Sensors can detect toxic CO, which is odorl
ess to humans. An electronic nose has applicability as a diagnostic tool. The tragic bombings in London on the 7 July 2005 have caused many to call for bag searching at the ticket barriers on the Underground. This would cause huge delays, apart from finding the manpower to do it. A possible alternative is using an "electronic nose" to sniff out possible explosives so that only selected bags need to be searched by staff.
Keywords: Sensing of dangerous gaseous particles present in atmosphere.
EXTENSION of the file: .pdf
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IP ADDRESS: 117.199.195.225

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Transactions: WSEAS TRANSACTIONS ON SIGNAL PROCESSING
Transactions ID Number: 32-166
Full Name: Chiunhsiun Lin
Position: Doctor (Researcher)
Age: ON
Sex: Male
Address: 69 Sec. 2 Chian_Kwo N. Road, Taipei, Taiwan, 10433
Country: TAIWAN
Tel:
Tel prefix:
Fax:
E-mail address: lincs@mail.ntpu.edu.tw
Other E-mails: lincs.ntpu@gmail.com
Title of the Paper: Colour Segmentation Using the Relative Values of RGB
Authors as they appear in the Paper: Chiunhsiun Lin
Email addresses of all the authors: lincs@mail.ntpu.edu.tw
Number of paper pages: 10
Abstract: In this paper, we propose a novel colour segmentation algorithm based on the derived inherent properties of RGB colour space. The proposed colour segmentation algorithm operates directly on RGB colour space without the need of colour space transformation and it is very robust to various illumination conditions. Furthermore, our approach has the benefits of being insensitive to rotation, scaling, and translation. In addition, the system can be applied to different applications, for example, colour segmentation of human skin colour and colour segmentation for fruits (vegetables) quality control by merely changing the values of the parameters (ƒÑ, ƒÒ1, ƒÒ2, ƒ×1, ƒ×2). Experimental results demonstrate the feasibility of our proposed approach in colour segmentation.
Keywords: Colour segmentation; Image processing; Computer vision; Face detection; Quality control; RGB colour space
EXTENSION of the file: .doc
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How Did you learn about congress: Chiunhsiun Lin, 69 Sec. 2 Chian_Kwo N. Road, Taipei, Taiwan, 10433, lincs@mail.ntpu.edu.tw
IP ADDRESS: 163.28.48.72

Thursday 22 January 2009

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Transactions: WSEAS TRANSACTIONS ON COMPUTERS
Transactions ID Number: 28-786
Full Name: Nor Azan Mat Zin
Position: Senior Lecturer
Age: ON
Sex: Female
Address: Department of Information Science, Faculty of Information Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM BANGI,Selangor,Malaysia
Country: MALAYSIA
Tel: 603 89216812
Tel prefix: 603
Fax: 603 8925 6732
E-mail address: azan@ftsm.ukm.my
Other E-mails: azanzin@yahoo.com
Title of the Paper: Digital Game-based learning (DGBL) model and development methodology for teaching History
Authors as they appear in the Paper: Nor Azan Mat Zin, Wong Seng Yue and Azizah Jaafar
Email addresses of all the authors: azan@ftsm.ukm.my,wsengy12@yahoo.com,aj@ftsm.ukm.my
Number of paper pages: 12
Abstract: History subject plays a vital role in instilling the spirits of patriotism among the students; to nourish and instill love and loyalty to one's country and to be a true citizen. The lack of creativity in history teaching caused process effectively and interestingly especially among young learners. Digital Game Based Learning (DGBL) approach utilizes the game as a medium for conveying learning contents. There are many models for educational games development which combined the Instructional Design (ID) and game development process. However, there is still a conflict on how to merge ID and game development effectively. Therefore, we looked into the pedagogy and game design aspects. We then propose a DGBL model for History educational games design and a development methodology which combined the ID and game development process, named DGBL-ID model. The DGBL-ID model consists of five phases: analysis, design, development, quality assurance as well as implementation and!
evaluation.
Keywords: Serious games, DGBL, Instructional Design (ID), History educational game, Video games
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Special (Invited) Session: Digital Game-based learning (DGBL) model and development methodology for teaching history
Organizer of the Session: 605-505.doc
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Transactions: WSEAS TRANSACTIONS ON MATHEMATICS
Transactions ID Number: 32-165
Full Name: Arsham Borumand Saeid
Position: Assistant Professor
Age: ON
Sex: Male
Address: Dept. of Math., Islamic Azad university
Country: IRAN
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Title of the Paper: Quasi Hyper BCK-algebras
Authors as they appear in the Paper: L. Torkzadeh
Email addresses of all the authors: ltorkzadeh@yahoo.com
Number of paper pages: 13
Abstract: By using the concept of fuzzy points, we generalize the notion of hyper BCK-algebra and the notions of fuzzy point hyper BCK-(sub) algebras, fuzzy point (weak, strong) hyper BCK-ideals, quasi hyper BCK-(sub) algebras and quasi (weak, strong) hyper BCK-ideals are introduced. The relationship between these notions are stated and proved. Finally, we study the condition QH on quasi hyper BCK-algebras.
Keywords: Hyper BCK-algebra, (quasi, fuzzy point) hyper BCK-algebra, (quasi, fuzzy
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Transactions: WSEAS TRANSACTIONS ON MATHEMATICS
Transactions ID Number: 32-164
Full Name: Arsham Borumand Saeid
Position: Assistant Professor
Age: ON
Sex: Male
Address: Dept. of Math., Shahid Bahonar University of Kerman
Country: IRAN
Tel:
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Fax:
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Other E-mails: arsham@mail.uk.ac.ir
Title of the Paper: Fuzzy dot BCK-algebras,
Authors as they appear in the Paper: Arsham Borumand Saeid
Email addresses of all the authors: arsham@mail.uk.ac.ir
Number of paper pages: 11
Abstract: In this paper the notion of fuzzy dot BCK-subalgebra are introduced. We state and prove some theorem in fuzzy dot BCK-subalgebras and level subalgebras.
Keywords: (fuzzy) BCK-algebra, fuzzy dot BCK-subalgebras, level subalgebras.
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Transactions: WSEAS TRANSACTIONS ON COMPUTERS
Transactions ID Number: 32-163
Full Name: Tarek Gharib
Position: Associate Professor
Age: ON
Sex: Male
Address: Faculty of Computer and Information Sciences, Ain Shams University, Cairo 11566, Egypt
Country: EGYPT
Tel: 002-010-6066683
Tel prefix:
Fax: 00202-33458610 ext. 216
E-mail address: tgharib@eun.eg
Other E-mails: mtarek62@yahoo.com
Title of the Paper: A Hybrid Approach for Indexing and Searching Protein Structure
Authors as they appear in the Paper: Tarek F. Gharib
Email addresses of all the authors: tgharib@eun.eg
Number of paper pages: 10
Abstract: Searching for structural similarities of proteins has a central role in bioinformatics field. Most tasks of bioinformatics depends on investigating the homologous protein's sequence or structure these tasks vary from predicting the protein structure to determine sites in protein structure where drug can be attached. Protein structure comparison problem is extremely important in many tasks. It can be used for determining function of protein, for clustering a given set of proteins by their structure, for assessment in protein fold prediction. Protein Structure Indexing Using Suffix Array and Wavelet (PSISAW) is a hybrid approach that provides the ability to retrieve similarities of proteins based on their structures. Indexing the protein structure is one approach of searching for protein similarities. We use the suffix arrays to index protein structure and use wavelet to compress the indexed database. Compressing the indexed database is supposed to make the searchin!
g time faster and memory usage lower but it affects the accuracy with accepted rate of error.The experimental results, which are based on the structural classification of proteins (SCOP) dataset, show that our method outperforms existing similar methods in memory utilization and searching speed. Our results show an enhancement in the memory usage with factor 50%.
Keywords: protein structures, indexing, suffix array, wavelet
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Wednesday 21 January 2009

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Transactions ID Number: 32-162
Full Name: fg fdg
Position: Assistant
Age: ON
Sex: Female
Address: sdfsda
Country: BOTSWANA
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Title of the Paper: sdafsf
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Number of paper pages: 10
Abstract: asdfasdfsadfsd
Keywords: sadfdas
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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 28-784
Full Name: Davorin Kralj
Position: Senior Lecturer
Age: ON
Sex: Male
Address: Na gricu 47, SI - 2000 Maribor
Country: SLOVENIA
Tel: 00 386 41 705 173
Tel prefix: 00 386
Fax: 00 386 2 613 6090
E-mail address: davorin.kralj@amis.net
Other E-mails: davorin.kralj@fm-kp.si
Title of the Paper: Methodological issues in cross-cultural and interdisciplinary research on sustainable development
Authors as they appear in the Paper: Anita Trnavèeviè, Davorin Kralj
Email addresses of all the authors: anita.trnavcevic@siol.net, davorin.kralj@amis.net
Number of paper pages: 10
Abstract: One of the perspectives is to understand and place sustainable development within broader picture of globalization and paradigm shift. As long as we 'neatly' divide education, sustainable development and politics we can discuss them as separate 'fields' of work. Globalization is associated with processes, such as internationalization, international relationships, unification and diversity, local and global and similar. It 'occurs' in all areas of social life and from some points of view in all scientific disciplines. The purpose of this article is to present methodological issues related to interdisciplinary and cross-cultural research and sustainable development. We can observe cross-cultural research in management, education, and in other disciplines of social sciences. Cross-cultural research, however, requires translation. If research is understood as a form of communication then cultural dimension play role in data collection stage as well as in other stages !
of research design. When questionnaires, tests and other instruments of data collection are used in different cultural and linguistic groups a question of equivalence becomes essential. Our consideration is that questionnaires like ours are subjected to double translations: from one field or discipline to other and from one language to other. In these double translations cultural equivalence basically cannot be ensured. Qualitative studies, however, can embrace cultural dimension.
Keywords: cultural equivalence, cross-cultural research, education, interdisciplinary research
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Special (Invited) Session: Cultural equivalence in cross-cultural and inter-disciplinary research
Organizer of the Session: ID 603 642
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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 28-785
Full Name: Davorin Kralj
Position: Senior Lecturer
Age: ON
Sex: Male
Address: Na gricu 47, SI - 2000 Maribor
Country: SLOVENIA
Tel: 00 386 41 705 173
Tel prefix: 00 386
Fax: 00 386 2 613 6090
E-mail address: davorin.kralj@amis.net
Other E-mails: davorin.kralj@fm-kp.si
Title of the Paper: Methodological issues in cross-cultural and interdisciplinary research on sustainable development
Authors as they appear in the Paper: Anita Trnavèeviè, Davorin Kralj
Email addresses of all the authors: anita.trnavcevic@siol.net, davorin.kralj@amis.net
Number of paper pages: 10
Abstract: One of the perspectives is to understand and place sustainable development within broader picture of globalization and paradigm shift. As long as we 'neatly' divide education, sustainable development and politics we can discuss them as separate 'fields' of work. Globalization is associated with processes, such as internationalization, international relationships, unification and diversity, local and global and similar. It 'occurs' in all areas of social life and from some points of view in all scientific disciplines. The purpose of this article is to present methodological issues related to interdisciplinary and cross-cultural research and sustainable development. We can observe cross-cultural research in management, education, and in other disciplines of social sciences. Cross-cultural research, however, requires translation. If research is understood as a form of communication then cultural dimension play role in data collection stage as well as in other stages !
of research design. When questionnaires, tests and other instruments of data collection are used in different cultural and linguistic groups a question of equivalence becomes essential. Our consideration is that questionnaires like ours are subjected to double translations: from one field or discipline to other and from one language to other. In these double translations cultural equivalence basically cannot be ensured. Qualitative studies, however, can embrace cultural dimension.
Keywords: cultural equivalence, cross-cultural research, education, interdisciplinary research
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Special (Invited) Session: Cultural equivalence in cross-cultural and inter-disciplinary research
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Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 32-161
Full Name: C.M. Tsai
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: 259, Wen-Hwa 1st Road, Kwei-Shan Tao-Yuan,TAIWAN (R.O.C.)
Country: TAIWAN
Tel:
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Other E-mails: chihhan@ieee.org
Title of the Paper: System Optimal Compensators Placement Via Immune Multi-Objective Algorithm
Authors as they appear in the Paper: T.Y.Hwang, C.M.Tsai, T.L. Huang, C.C.Huang, Y.N.Lien, C.M.Chung, and C.H.Chang
Email addresses of all the authors: chihhan@ieee.org,tsongliang@tea.ntue.edu.tw
Number of paper pages: 10
Abstract: This work proposes a two-stage immune algorithm that embeds the compromise programming to perform multi-objective optimal compensator placement. A new problem formulation model that involves fuzzy sets to reflect the imprecise nature of objectives and incorporates multiple planning requirements is presented. The proposed approach finds a set of non-inferior (Pareto) solutions rather than any single aggregated optimal solution. Additionally, this developed approach eliminates the need for any user-defined weight factor to aggregate all objectives. Comparative studies are conducted on an actual system with encouraging results, demonstrating the effectiveness of the proposed approach.
Keywords: Compensator placement, immune algorithm, non-inferior set, compromise programming.
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Transactions: WSEAS TRANSACTIONS ON COMPUTERS
Transactions ID Number: 32-160
Full Name: Wenyu Zhang
Position: Professor
Age: ON
Sex: Male
Address: 18 Xueyuan Street, Xiasha, Hangzhou, Zhejiang Province
Country: CHINA
Tel: 86-571-87557126
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Fax:
E-mail address: wyzhang@pmail.ntu.edu.sg
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Title of the Paper: Automatic discovery of data resources in the e-government grid
Authors as they appear in the Paper: Xianhu Meng, Yan Wang, Wenyu Zhang, and Jinqi Meng
Email addresses of all the authors: mengxianhu@163.com,wangyan@zufe.edu.cn,wyzhang@pmail.ntu.edu.sg
Number of paper pages: 10
Abstract: Nowadays, there is a growing number of e-government portals and solutions that provide integrated governmental data resources to the customers (citizens, enterprises or other public sectors). However, the administration of distributed data resources are faced with increasing challenges caused by the discovery difficulties across the internet. To overcome this, this paper puts forward the concept of a model for automatic data resource discovery in the data grid environment for e-government applications. The paper elaborates the rule of global naming, brings forward metadata¡¯s registration and storage on the naming rule, and explores how to use it to find out the long-distance data resources rapidly. The paper also sets forth the method for restraining, sending and accessing data resources repeatedly by searching ¡°comparison table¡± and using the time marker under the multiple data grid nodes, and points out that ¡°comparison table¡± should adopt the strategy of pr!
efering frequently used data and clearing rarely used data.
Keywords: Data grid, E-government; Metadata; Global naming; Data discovery
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How Did you learn about congress: Library, Zhejiang University of Finance & Economics, 18 Xueyuan Str., Xiasha, Hangzhou, Zhejiang Province, China 310018. Email: tsgbgs@zufe.edu.cn
IP ADDRESS: 117.68.148.215

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Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 32-159
Full Name: Vilas Ghate
Position: Senior Lecturer
Age: ON
Sex: Male
Address: Electrical Engg Dept. Govt. College of Engineering Kathora Naka Amravati 444603 (MS)
Country: INDIA
Tel: +91 09765657809
Tel prefix:
Fax:
E-mail address: vng786@rediffmail.com
Other E-mails: vilas_ghate@rediffmail.com
Title of the Paper: Induction Machine Fault Detection Using Support Vector Machine Based Classifier
Authors as they appear in the Paper: Vilas N Ghate , Dr.Sanjay V Dudul
Email addresses of all the authors: svdudul@rediffmail.com
Number of paper pages: 14
Abstract: Industrial motors are subject to various faults which, if unnoticed, can lead to motor failure. The necessity of incipient fault detection can be justified by safety and economical reasons. The technology of artificial neural networks has been successfully used to solve the motor fault detection problem. This paper develops inexpensive, reliable, and noninvasive NN based fault detection scheme for small and medium sized induction motors. Detailed design procedure for achieving the optimal NN model and Principal Component Analysis for dimensionality reduction is proposed. Overall thirteen statistical parameters are used as feature space to achieve the desired classification. Generalized Feed Forward (GFFDNN) and Support Vector Machine (SVM) NN models are designed and verified for optimal performance in fault identification on experimental data set of custom designed 2 HP, three phase 50 Hz induction motor.
Keywords: Induction motor, Fault detection, Neural Network, GFFDNN, SVM, PCA
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IP ADDRESS: 210.212.166.245

Tuesday 20 January 2009

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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 32-158
Full Name: Ahmed EL OUALKADI
Position: Assistant Professor
Age: ON
Sex: Male
Address: ENSA Tanger, Route Ziaten, BP 1818, Tanger
Country: MOROCCO
Tel: +212 39 393743
Tel prefix:
Fax: +212 39 393744
E-mail address: ahmed.eloualkadi@ieee.org
Other E-mails: aoualkadi@gmail.com
Title of the Paper: Systematic-design of Sigma-Delta fractional-N phase-locked loop using HDL-AMS models
Authors as they appear in the Paper: Ahmed El Oualkadi
Email addresses of all the authors: ahmed.eloualkadi@ieee.org
Number of paper pages: 10
Abstract: This paper discusses a systematic design of a Sigma-Delta fractional-N Phase-Locked Loop based on HDL behavioral modeling. The proposed design consists in describing the mixed behavior of this PLL architecture starting from the specifications of each building block. The HDL models of critical PLL blocks have been described in VHDL-AMS to predict the different specifications of the PLL. The effect of different noise sources has been efficiently introduced to study the PLL system performances. The obtained results are compared with transistor-level simulations to validate the effectiveness of the proposed models.
Keywords: Phase-locked loop, frequency synthesizer; fractional-N PLL; Sigma-Delta modulator; HDL models; behavioral modeling
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Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 32-157
Full Name: BAOUCHE rafik
Position: Researcher
Age: ON
Sex: Male
Address: Bat-11-A-03 Boumerdes - 35000
Country: ALGERIA
Tel: 0240662306945
Tel prefix:
Fax:
E-mail address: r_baouche@yahoo.fr
Other E-mails: RBaouche@gmail.com
Title of the Paper: Using the Hydraulic Flow Unit and Fuzzy Logic Analysis into Improved Permeability Prediction for the Hassi R'Mel Field, Algeria.,
Authors as they appear in the Paper: R. Baouche*, A. Nedjari**, S. Eladj* and R. Chaouchi*
Email addresses of all the authors: *R_baouche@yahoo.fr; Rachaouchi@yahoo.fr ; Eladj_said@yahoo.fr ;**A. Nedjari@gmail.com
Number of paper pages: 12
Abstract: Characterization of the shaly sand reservoirs by flow units is a practical way of reservoir zonation. This work represents a petrophysical-based method that uses well loggings and core plug data to delineate flow units within the most productive shaly sand reservoir of Triassic Formation in Hassi R'Mel field of Algeria. In the study of oil reservoirs, the prediction of absolute permeability is a fundamental key in reservoir descriptions and has a direct impact on, amongst others, effective completion designs, successful water injection programs and more efficient reservoir management. Usually simple linear regressions of core porosity and permeability data or empirical relationships using various log responses (e.g. porosity, clay volume and water saturation) have been used to predict permeability. These empirical methods only apply locally and ignore the fact that there is no theoretical basis for a relationship between porosity and permeability. The Triassic Form!
ations of Hassi R'Mel fields are composed of sandstones and shaley sandy with dolomite. Logs from the 8 wells are the starting point for the reservoir characterization. The general geologic framework obtained from the logs point out for discriminations within the formation. Some representative core plug data from 10 different wells are used to better understand the petrophysical framework of the formation. The plots correlating petrophysical parameters and the frequency histograms suggest the presence of distinctive reservoir trends. The permeability models are constructed and their reliabilities are compared by the regression coefficients for predictions in un-cored sections. This indicates the presence of several "hydraulic flow units" (HFU) of similar petrophysical characteristics. Analysis of core data from the Hassi R'Mel East (HRE) Field in Algeria indicates such a scenario. The predicted permeabilities for each unit show good correlations with the calculated ones fro!
m core plugs. Highly reliable future estimations can be based on the d
erived methods.
Keywords: Well Log, Core analysis, Reservoirs, Modelling, Flow unit, Hassi R'Mel,Sahara.
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Monday 19 January 2009

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Transactions ID Number: 32-156
Full Name: Manzur Ashraf
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: ITR, UniSA, Mawson Lakes, SA 5095
Country: AUSTRALIA
Tel:
Tel prefix:
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E-mail address: ashraf.manzur@gmail.com
Other E-mails: Manzur.Ashraf@postgrads.unisa.edu.au
Title of the Paper: Analytical Rate Adaptive Channel MAC
Authors as they appear in the Paper: Manzur Ashraf, Aruna Jayasuriya
Email addresses of all the authors: ashraf.manzur@gmail.com, jayasuriya.aruna@gmail.com
Number of paper pages: 13
Abstract: A novel rate adaptive Channel MAC paradigm has been proposed considering perfect channel prediction and optimal rate adaptation. Simulation results reveal a significant performance gap between the theoretical rate adaptive Channel MAC and existing rate adaptive protocols- such as `Opportunistic Auto Rate' (OAR). Furthermore, we show that the proposed scheme still outperforms OAR in the presence of moderate channel prediction inaccuracies. We further extend the rate adaptive Channel MAC considering receiver diversity using two variants and present relevant analytical models. Simulation results reveal possible throughput improvement in the rate adaptive Channel MAC when we consider receiver diversity. The application shows the feasibility of the rate adaptive Channel MAC even in a Single Input Multiple Output (SIMO) environment.
Keywords: rate control, channel mac, wireless network, MAC, access control
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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 32-155
Full Name: Manzur Ashraf
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: ITR, University of South Australia, Mawson lakes
Country: AUSTRALIA
Tel: +61 403659339
Tel prefix:
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E-mail address: ashraf.manzur@gmail.com
Other E-mails: Manzur.Ashraf@postgrads.unisa.edu.au
Title of the Paper: Distributed Opportunistic Communication Protocol for Wireless Multihop Networks
Authors as they appear in the Paper: Manzur Ashraf, Aruna Jayasuriya, Sylvie Perreau
Email addresses of all the authors: ashraf.manzur@gmail.com, jayasuriya.aruna@gmail.com, perreau.sylvie@gmail.com
Number of paper pages: 16
Abstract: Despite significant research effort, the performance of distributed medium access control methods has failed to meet theoretical expectations. Previously we have proposed the concept for a fully distributed, but non optimum opportunistic medium access control called Channel MAC. In this paper we present the Channel MAC protocol operations addressing the issues of information exchange between nodes, predicting transmission intervals and selecting transmission thresholds to achieve fairness. Although the proposed prediction scheme based on mean channel fading is simple to implement, it is imperfect leading to some performance losses. Event based simulation tool NS2 is used to analyse the performance of Channel MAC in a number of network scenarios. We analyse the performance of the proposed protocol using the performance metric; throughput, fairness, and delay. The simulation results show throughput performance improvement of up to 30\% with Channel MAC over IEEE 802.!
11 in certain multihop scenarios. Generally the proposed protocol outperforms 802.11 in all analysed network scenarios. We also show that the severe resource starvation problem (unfairness) of IEEE 802.11 in some network scenarios is reduced by the Channel MAC mechanism.
Keywords: Ad hoc networks, Wireless communications, Medium access control, Performance improvement, Throughput improvement, Fairness
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Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 32-154
Full Name: Rozli Zulkifli
Position: Senior Lecturer
Age: ON
Sex: Male
Address: Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia
Country: MALAYSIA
Tel: 89216522
Tel prefix: +603
Fax: +603-89259659
E-mail address: rozli@eng.ukm.my
Other E-mails: enrozli@gmail.com
Title of the Paper: Comparison of Local Nusselt Number Between Steady and Pulsating Jet at Different Jet Reynolds Number
Authors as they appear in the Paper: Rozli Zulkifli, Kamaruzzaman Sopian, Shahrir Abdullah and Mohd Sobri Takriff
Email addresses of all the authors: ksopian@eng.ukm.my, shahrir@eng.ukm.my, sobri@eng.ukm.my
Number of paper pages: 10
Abstract: Abstract: - The study was carried out to determine the effect of pulsating frequencies exiting from a hot circular air jet on the local heat transfer of a flat impingement aluminium plate. The velocity profile of a steady heated circular air jet and pulsating air jet at frequencies of 10 and 20 Hz was measured in the first part of the study. The same set-up was used to measure the heat flux of the pulsating jet impinging on a flat aluminium plate. The heat flux of the heated air jet impinging on the plate was measured using a heat flux micro-sensor at radial positions between 0 to 12 cm away from the stagnation point. Measurement of the heat flux was used to calculate the local heat transfer coefficient and local Nusselt Number for steady air jet and for air jet pulsating frequencies of 10 and 20 Hz. The Reynolds number used were 16 000, 23 300 and 32 000. Results obtained show that the local Nusselt number calculated at all measurement point for pulsating jet were!
higher than the local Nusselt number for steady jet. The results for pulsating jet Nusselt number was higher than the steady jet Nusselt number for the value of frequencies measured are due to the higher localised heat transfer. The higher Nusselt number obtained at localized radial positions can be due to the higher instantaneous velocity as was shown from the velocity profile plotted in the first part of the experiment. The relationship between the two results shows that higher flow velocity and turbulence intensity gives higher localized heat transfer.
Keywords: Pulsating air jet, jet frequency, Nusselt number, Reynolds number, Heat transfer coefficient
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