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Articles 15271 - 15300 of 16631

Full-Text Articles in Physical Sciences and Mathematics

Networks - Ii: Development Of Symmetric Cryptosystem Using Matrices With Less Overhead On Communication Channel, Jalal F. Al-Muhtadi, Abdul Basit, Maqsood Mahmud Aug 2009

Networks - Ii: Development Of Symmetric Cryptosystem Using Matrices With Less Overhead On Communication Channel, Jalal F. Al-Muhtadi, Abdul Basit, Maqsood Mahmud

International Conference on Information and Communication Technologies

Many systems have been developed by mathematicians using symmetric and Asymmetric Cryptography e.g. Ceaser Cipher, Stream Ciphers, RSA, DES, IDEA, RC-4, ElGamal signatures, LFSR, Ext. Euclidean Algorithm, Lamport Signatures, Merkle Hellman Knapsack. Etc [1]. Some of them are very strong to be broken by cryptanalysts. Some are very easy and even can be broken by the measuring the frequency of alphabets in a specific cipher text. All these system carries some overhead of key with which a plain text is encrypted, for the communication channel. I thought of an idea in which product component which will be 5*1 matrix will …


Networks - Ii: A New Rough Set Based Approach For Optimized Detection Of Available Resources In Grid Computing, Asgarali Bouyer, Mohd Noor Md Sap, Abdul Hanan Abdullah Aug 2009

Networks - Ii: A New Rough Set Based Approach For Optimized Detection Of Available Resources In Grid Computing, Asgarali Bouyer, Mohd Noor Md Sap, Abdul Hanan Abdullah

International Conference on Information and Communication Technologies

Since the grid is a dynamic environment, the prediction and detection of available resources in near future is important for resource scheduling. Economic-based grid management has been viewed as a feasible approach to carry out fair, efficient and reliable scheduling. One key issue in economic-based grid strategy is to inform about available resources. In this paper, we present a novel predictable method to specify available resource in economic-based grid. This method use a rough set analysis by scheduler to divide resources in groups and then grant a priority to each group based on cost price and efficiency of nodes. The …


Artificial Intelligence – Ii: Anomaly Detection In Data Streams Using Fuzzy Logic, Muhammad Umair Khan Aug 2009

Artificial Intelligence – Ii: Anomaly Detection In Data Streams Using Fuzzy Logic, Muhammad Umair Khan

International Conference on Information and Communication Technologies

Unsupervised data mining techniques require human intervention for understanding and analysis of the clustering results. This becomes an issue in dynamic users/applications and there is a need for real-time decision making and interpretation. In this paper we will present an approach to automate the annotation of results obtained from data stream clustering to facilitate interpreting that whether the given cluster is an anomaly or not. We use fuzzy logic to label the data. The results will be obtained on the basis of density function & the number of elements in a certain cluster.


Networks - Ii: Overhead Analysis Of Security Implementation Using Ipsec, Muhammad Awais Azam, Zaka -Ul- Mustafa, Usman Tahir, S. M. Ahsan, Muhammad Adnan Naseem, Imran Rashid, Muhammad Adeel Aug 2009

Networks - Ii: Overhead Analysis Of Security Implementation Using Ipsec, Muhammad Awais Azam, Zaka -Ul- Mustafa, Usman Tahir, S. M. Ahsan, Muhammad Adnan Naseem, Imran Rashid, Muhammad Adeel

International Conference on Information and Communication Technologies

Authentication, access control, encryption and auditing make up the essential elements of network security. Researchers have dedicated a large amount of efforts to implement security features that fully incorporate the use of all these elements. Currently, data networks mainly provide authentication and confidentiality services. Confidentiality alone is not able to protect the system, thus, suitable security measures must be taken. However, this security is itself an overhead which must be accounted for. A trade-off must exist between performance and security. This trade-off must be carefully managed so as not to deteriorate the systems being secured. This calls for the true …


Networks - Ii: Formal Modeling Of Trust In Semantic Grid Registry, Saba Mahmood, Saman Iftikhar, Hafiz Farooq Ahmad, Farah Mahmood Aug 2009

Networks - Ii: Formal Modeling Of Trust In Semantic Grid Registry, Saba Mahmood, Saman Iftikhar, Hafiz Farooq Ahmad, Farah Mahmood

International Conference on Information and Communication Technologies

In this paper we have analyzed and developed a formal specification of a trust model in semantic grid registry. This paper formalizes the basic requirements of a trust model in case of semantic grid registry. We have described the flow of operations of our system through links and processes in the system architecture. The system is formally modeled in pi-calculus. Finally we transformed the specification to pi- ADL and generated code using Archware tool. We have already developed a semantic grid registry.


Data Mining: Assessment Of Features Quality Of Class Discrimination Using Arif Index And Its Application To Physiological Datasets, Dr. Muhammad Arif, A. Fida Aug 2009

Data Mining: Assessment Of Features Quality Of Class Discrimination Using Arif Index And Its Application To Physiological Datasets, Dr. Muhammad Arif, A. Fida

International Conference on Information and Communication Technologies

Quality of features determines the maximum achievable accuracy by any arbitrary classifier in pattern classification problem. In this paper, we have proposed an index that can assess the quality of features in discrimination of patterns in different classes. This index is in-sensitive to the complexity of boundary separating different classes if there is no overlap among features of different classes. Proposed index is model free and requires no clustering algorithm to discover the clustering structure present in the feature space. It is only based on the information of local neighborhood of feature vectors in the feature space. This index can …


Application Of Ict - I: Using Point-To-Point 1550nm Laser For Outdoor Mobility, Roshan A. Shaikh, Abdul Basit Aug 2009

Application Of Ict - I: Using Point-To-Point 1550nm Laser For Outdoor Mobility, Roshan A. Shaikh, Abdul Basit

International Conference on Information and Communication Technologies

Significant implementation challenges exist in wireless backbone connectivity. Typical optical wireless communication topologies are evaluated. A fresh approach using 1550nm Wavelength laser to design protocol and topology for point-to-point outdoor connectivity is carried out. Matlab simulation results support the 1550nm laser as a good choice for outdoor connectivity for optical wireless communication. New design and topology for an optical wireless communication system is suggested with special consideration of security and recommendation for the optimal use of such a technology is suggested.


Data Mining: Analyzing Impact Of Outliers' Detection And Removal From The Test Sample In Blind Source Extraction Using Multivariate Calibration Techniques, S. R. Naqvi, F. Rehman, S. S. Naqvi, A. Amin, I. Qayyum, S. Khan, W. A. Khan Aug 2009

Data Mining: Analyzing Impact Of Outliers' Detection And Removal From The Test Sample In Blind Source Extraction Using Multivariate Calibration Techniques, S. R. Naqvi, F. Rehman, S. S. Naqvi, A. Amin, I. Qayyum, S. Khan, W. A. Khan

International Conference on Information and Communication Technologies

Blind source extraction (BSE) may be an essential but a challenging task where multiple sources are convolved and/or time delayed. In this article we discuss the performance of multivariate calibration techniques that comprise of classical least square (CLS), inverse linear regression (ILS), principal component regression (PCR) and partial least square regression (PLS) in achieving this task in robust speech recognition systems with varying signal-to-noise ratios (SNR). We specifically analyze two methods for identifying and removing outliers from the sample, namely; outlier sample removal (OSR) and descriptor selection (DS) for classical least square and factor Based regression respectively, which results in …


Networks - I: Networks-On-Chip: Challenges, Trends And Mechanisms For Enhancements, Omer Tayan Aug 2009

Networks - I: Networks-On-Chip: Challenges, Trends And Mechanisms For Enhancements, Omer Tayan

International Conference on Information and Communication Technologies

The rate of increase of silicon capacity in integrated circuits (IC) will enable system integration of several billion transistors to reside on a single chip in the near future. Future system-on-chip (SoC) systems must therefore integrate up to several hundreds of cores within a single chip, and SoC designs will employ on-chip communication networks (NoCs) as a result. This paper discusses the problems with many current SoC systems, surveys the challenges and trends facing future SoC designs and proposes a mechanism for enhancing NoC strategies of the future by enhancing memory management and utilization techniques within an NoC.


Networks - I: Investigating Access To Heterogeneous Storage Systems Using Linked Data In Unicore Grid Middleware, Roger Menday, M. Shahbaz Memon, A. Shiraz Memon, Achim Streit Aug 2009

Networks - I: Investigating Access To Heterogeneous Storage Systems Using Linked Data In Unicore Grid Middleware, Roger Menday, M. Shahbaz Memon, A. Shiraz Memon, Achim Streit

International Conference on Information and Communication Technologies

The Grid provides access to execution and storage resources - through middleware - by normalizing the access to resources. UNICORE calls this quality dasiaseamlessnesspsila. One result of this is that a request for some action at one resource can, with relative ease, be re-targeted to another, making possible the coordinated usage of multiple resources. In this paper we describe a seamless interface to heterogeneous storage systems, using the (Semantic) Web as middleware for the Grid. Data is accumulated by experiments and simulations running on execution systems, instruments and sensors, and by importing data from other locations. Storage systems are regular …


Networks - I: A Comparative Analysis Of Dccp Variants (Ccid2, Ccid3), Tcp And Udp For Mpeg4 Video Applications, Muhammad Ajmal Azad, Rashid Mahmood, Tahir Mehmood Aug 2009

Networks - I: A Comparative Analysis Of Dccp Variants (Ccid2, Ccid3), Tcp And Udp For Mpeg4 Video Applications, Muhammad Ajmal Azad, Rashid Mahmood, Tahir Mehmood

International Conference on Information and Communication Technologies

New emerging technologies like Multimedia applications require timely delivery of information as compared to reliability. The most widely used protocols over transport layer are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Both of these have some drawbacks while using in real time applications. TCP increases delay in transfer of data but achieving reliable transfer of data while UDP does not provide any acknowledgment, hence it overcomes the problem of delay but lacking congestion control mechanism. To provide congestion control over transport layer using UDP, Datagram Congestion Control Protocol (DCCP) has been designed to provide timely delivery of data …


Artificial Intelligence – I: A Two-Step Approach For Improving Efficiency Of Feedforward Multilayer Perceptrons Network, Shoukat Ullah, Zakia Hussain Aug 2009

Artificial Intelligence – I: A Two-Step Approach For Improving Efficiency Of Feedforward Multilayer Perceptrons Network, Shoukat Ullah, Zakia Hussain

International Conference on Information and Communication Technologies

An artificial neural network has got greater importance in the field of data mining. Although it may have complex structure, long training time, and uneasily understandable representation of results, neural network has high accuracy and is preferable in data mining. This research paper is aimed to improve efficiency and to provide accurate results on the basis of same behaviour data. To achieve these objectives, an algorithm is proposed that uses two data mining techniques, that is, attribute selection method and cluster analysis. The algorithm works by applying attribute selection method to eliminate irrelevant attributes, so that input dimensionality is reduced …


Networks - I: Collaborative 3d Digital Content Creation Exploiting A Grid Network, M. Gkion, M. Z. Patoli, A. Al-Barakati, W. Zhang, P. Newbury, M. White Aug 2009

Networks - I: Collaborative 3d Digital Content Creation Exploiting A Grid Network, M. Gkion, M. Z. Patoli, A. Al-Barakati, W. Zhang, P. Newbury, M. White

International Conference on Information and Communication Technologies

The increase in ease of the production of computer simulated graphics has opened new opportunities in the 3D industry. There are unlimited applications for the delivery of 3D Graphics especially concerning 3D multimedia presentation of digital content. Apart from aesthetic and entertaining reasons, experts apply computer simulations to visualize environments and to identify early errors or costs in order to limit the need of making real prototypes. Thus, 3D Graphics also minimize the time required for developing the final product. Existing 3D applications give partial support to users to engage in collaborative contribution for the production of a 3D model. …


Networks - I: Cooperative Friendship Networks Through Slac With Newscast, M. Usman Akram, Anam Tariq Aug 2009

Networks - I: Cooperative Friendship Networks Through Slac With Newscast, M. Usman Akram, Anam Tariq

International Conference on Information and Communication Technologies

The effective cooperation and coordination of nodes is necessary for performance improvement in the P2P network. In this paper, we focus on the problem of maintaining considerable amount of cooperation and friendship in P2P networks of selfish peers. For this purpose we will analyze the performance of SLAC. It is a simple algorithm that maintains excessive levels of cooperation and friendship in a network while performing tasks. A simulation model ldquoPrisoners' Dilemmardquo is presented that puts this algorithm to work in a Peersim environment. For providing random sampling, an existing protocol called ldquoNEWSCASTrdquo has been used. The extensive computer simulations …


Artificial Intelligence – I: Subjective Decision Making Using Type-2 Fuzzy Logic Advisor, Owais Malik Aug 2009

Artificial Intelligence – I: Subjective Decision Making Using Type-2 Fuzzy Logic Advisor, Owais Malik

International Conference on Information and Communication Technologies

In this paper, we present and compare two-stage type-2 fuzzy logic advisor (FLA) for subjective decision making in the domain of students' performance evaluation. We test our proposed model for evaluating students' performance in our computer science and engineering department at HBCC/KFUPM in two domains namely cooperating training and capstone/senior project assessment where we find these FLAs very useful and promising. In our proposed model, the assessment criteria for different components of cooperative training and senior project are transformed into linguistic labels and evaluation information is extracted into the form of IF-THEN rules from the experts. These rules are modeled …


Mitigating Co2 Production In Coal-To-Liquids Process, Robert Walty Aug 2009

Mitigating Co2 Production In Coal-To-Liquids Process, Robert Walty

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Hydrogen In Non-Crystalline Materials: From Solar Cells To Hydrogen Storage, Anatolii Shkrebtii Aug 2009

Hydrogen In Non-Crystalline Materials: From Solar Cells To Hydrogen Storage, Anatolii Shkrebtii

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Hydrogen R&D At Sandia National Labs, Lennie Klebanoff Aug 2009

Hydrogen R&D At Sandia National Labs, Lennie Klebanoff

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Proposed Enhanced Geothermal System Demonstration At The Nevada Test Site, Michael Voegele Aug 2009

Proposed Enhanced Geothermal System Demonstration At The Nevada Test Site, Michael Voegele

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Unlv Solar And Renewable Energy Minor, Thomas C. Piechota Aug 2009

Unlv Solar And Renewable Energy Minor, Thomas C. Piechota

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Microalgae For Biodiesel, Co2 Capture, And Wastewater Treatment, Jian Ma Aug 2009

Microalgae For Biodiesel, Co2 Capture, And Wastewater Treatment, Jian Ma

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Overview Of Dri’S Renewable Energy Activities, Kent Hoekman Aug 2009

Overview Of Dri’S Renewable Energy Activities, Kent Hoekman

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Nshe's Nevada Renewable Energy Consortium, Steve Wells Aug 2009

Nshe's Nevada Renewable Energy Consortium, Steve Wells

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance


Current Projects At The Unlv Center For Energy Research, Robert F. Boehm Aug 2009

Current Projects At The Unlv Center For Energy Research, Robert F. Boehm

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Education And Energy Innovation: Nshe’S Central Role In Transforming Nevada’S Economy, James Croce Aug 2009

Education And Energy Innovation: Nshe’S Central Role In Transforming Nevada’S Economy, James Croce

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Over A Barrel: A Worldwide Energy Crisis…, Alfred S. Schlachter Aug 2009

Over A Barrel: A Worldwide Energy Crisis…, Alfred S. Schlachter

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


Nevada’S Changing Renewable Energy Landscape, Kathleen Drakulich Aug 2009

Nevada’S Changing Renewable Energy Landscape, Kathleen Drakulich

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


The Way Forward: A Vision For Nevada’S Energy Future, Thomas Fair Aug 2009

The Way Forward: A Vision For Nevada’S Energy Future, Thomas Fair

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


2009 Symposium Schedule And Sponsors, University Of Nevada Las Vegas Aug 2009

2009 Symposium Schedule And Sponsors, University Of Nevada Las Vegas

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.


2009 Symposium Schedule, University Of Nevada Las Vegas Aug 2009

2009 Symposium Schedule, University Of Nevada Las Vegas

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.