Research ArticleOpen accessIn the abstractInteger Factorization: Solution via Algorithm for Constrained Discrete Logarithm ProblemBoris S. VerkhovskyProblem statement: During the last thirty years many public-key cryptographic protocols based on either the complexity of integer factorization of large semiprimes or the Discrete Logarithm Problem (DLP) have been developed. Approach: Although several factorization algorithms with sub-exponential complexity have been discovered, the recent RSA Factoring Challenge demonstrated that it was still necessary to use several thousand computers working in … …Journal of Computer Science, Vol. 5, Issue 9 · 30 Dec 2009 · 7,156 accessesView PDFCite
Research ArticleOpen accessIn the abstractUsing Combinational Circuits for Control PurposesMaher A. Nabulsi, Mohammed A.F. Al-HusainyProblem statement: Combinational circuits are used in computers for generating binary control decisions and for providing digital components for data processing. Approach: The use of combinational circuits and logic gates to control other circuits was discussed. Different systems that use logic gates, multiplexers, decoders and encoders to control different circuits were presented. This study presented a design and implementation of … …Journal of Computer Science, Vol. 5, Issue 7 · 31 Jul 2009 · 7,237 accessesView PDFCite
Research ArticleOpen accessIn the abstractDoIP Interfacer System: A Low-Cost Alternative to Computer for Basic Network Communication in LAN EnvironmentEmmanuel Jo-el Tay, Choong Fook Lim, HemalathaProblem statement: Computer, very important to human society because of its capability in performing complex task. Questions were raised on the practicality of using computer for basic network communication where cost, portability and flexibility are major concerns. Explore a low-cost alternative to computer for basic network communication in LAN environment which consumes less power and portable as well as to … …Journal of Computer Science, Vol. 5, Issue 7 · 31 Jul 2009 · 6,829 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptical Nonlinear Proreties and Optical Limiting Effect of Metanil YellowR. K. Rekha, A. RamalingamProblem statement: The third order nonlinear optical properties of organic polymers are used in high speed telecommunication, optical limiters and optical computers. The purpose of the study was to determine the third order nonlinear characteristics and optical limiting effect of the organic dye, metanil yellow in liquid and solid medium. Approach: The samples were prepared by dissolving the dye in … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 18 Jun 2009 · 7,719 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe New Variable-Length Key Symmetric CryptosystemDavood Rezaei Pour, Mohamad Rushdan Md Said, Kamel Ariffin Mohd Atan, Mohamed OthmanProblem statement: In this study, we proposed a new 64-bit block cipher that accepted a variable-length key up to 512 bits, which was suitable for implementation in a variety of environments. Approach: The cipher algorithm was a 16-round Feistel network with a bijective function f and was made up of two key-dependent 16×16 S-boxes, bitwise rotations, and a carefully designed … …Journal of Mathematics and Statistics, Vol. 5, Issue 1 · 31 Mar 2009 · 7,213 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Study of Mathematics Web-Based Learning in SchoolsMansoor Al-A’aliTeaching Mathematics to intermediate school boys is a challenging process which can greatly benefit from software technology and web-based learning. In this research we study the difficulties and opportunities of using this technology in teaching Mathematics to 13 year old boys studying Mathematics at school. For students' we identify the basic requirements at home, e.g., Mathematics computer software packages, availability … …American Journal of Applied Sciences, Vol. 5, Issue 11 · 30 Nov 2008 · 7,266 accessesView PDFCite
Research ArticleOpen accessIn the abstractPredictors of Technology Deployment Among Malaysian TeachersNaresh Kumar, Raduan Che Rose, Jeffrey Lawrence D’SilvaTechnologies advocate researchers had identified a number of factors that affect individual teachers' usage of computers. Nevertheless mix results were reported in literature. Hence, this study used personal characteristics and the technology acceptance constructs to understand the Actual Usage of Computer (AUC) among Malaysian teachers. The final model derived from this study was able to explain and predict approximately 54.5% … …American Journal of Applied Sciences, Vol. 5, Issue 9 · 30 Sep 2008 · 7,031 accessesView PDFCite
Research ArticleOpen accessIn the abstractPossibility of High Performance Quantum Computation by using Evanescent Photons in Living SystemsTakaaki MushaPenrose and Hameroff suggested that microtubles in living systems functioned as quantum computers by utilizing evanescent photons. On the basis of the theorem that the evanescent photon is a superluminal particle, the possibility of high performance computation in living systems has been studied. From the theoretical analysis, it is shown that the living system can achieve large quantum bits computation … …OnLine Journal of Biological Sciences, Vol. 8, Issue 1 · 31 Mar 2008 · 6,359 accessesView PDFCite
Research ArticleOpen accessIn the abstractHow Prepared are Trainee Teachers of University Putra Malaysia (UPM) to Integrate Computer Technology in Classroom Teaching?Shamsiah Mohamed, Ab. Rahim BakarThis research is a presentation of a study on trainee teachers' preparedness to integrate computer technology in teaching. One-hundred and thirty-nine trainee teachers participated in the study. They comprised 12.2% male students and 87.8% female. They majored in agricultural science, home-science, language, economics or accounting and science and mathematics. Their academic achievements were between 2.00 and 3.74 (Mean = 2.91, … …Journal of Social Sciences, Vol. 4, Issue 1 · 31 Mar 2008 · 7,799 accessesView PDFCite
Research ArticleOpen accessIn the abstractRemoving Useless Productions of a Context Free Grammar through Petri NetMansoor Al-A'ali, Ali A. KhanFollowing the proposal for a Petri Net (PN) representation of the Context Free Grammar (CFG)[1], we propose in this paper, an algorithm to eliminate the useless productions of CFG. First the CFG is represented by a PN. Then, based on the reachability, an algorithm is developed to eliminate Useless-productions. The algorithm is analyzed and implemented in Pascal using examples of … …Journal of Computer Science, Vol. 3, Issue 7 · 31 Jul 2007 · 6,670 accessesView PDFCite