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128 articles for “Communications”
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Research ArticleOpen accessIn the abstractTurning Risks into Opportunities in Contract Management: A Case Study in the Health Care IndustryElizabeth McVickerProblem statement: This case study presented students with a situation based in the healthcare industry, highlighting the importance of contract review, clear communications and interestbased negotiations in order to avoid the costly consequences that could be associated with contract related disputes. The case allowed students to understand how clearly written contracts play a deciding role in the success of business … …American Journal of Economics and Business Administration, Vol. 3, Issue 2 · 7 Apr 2011 · 7,349 accessesView PDFCite
Research ArticleOpen accessIn the abstractPAPR Reduction Using BPSO/PTS and STBC in MIMO OFDM SystemKarima El Mouhib, Ahmed Oquour, Younes Jabrane et al.Problem statement: The Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system has been receiving a great attention, as one of solutions for achieving high speed, efficient and high-quality service for the wireless communications. However, the transmitted signal still has high PAPR because of OFDM characteristics. Many methods have been proposed to solve this problem, but the most … …Journal of Computer Science, Vol. 7, Issue 4 · 4 Apr 2011 · 7,199 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn M-Learning System Based on Mobile Phones and Quick Response CodesHend S. Al-KhalifaProblem statement: Many instructors in academia wish to know how much their students understand the content of the lecture; however, doing this manually will be very difficult and time consuming. Similarly, most students have communication problems with their instructors and they wish if they can ask their questions without any fear. So a need for a technology to bridge these … …Journal of Computer Science, Vol. 7, Issue 3 · 9 Mar 2011 · 6,936 accessesView PDFCite
Research ArticleOpen accessIn the abstractReview of E-Learning and ICT Infrastructure in Developing Countries (Case Study of Iran)Siavash Omidinia, Maslin Masrom, Harihuddin SelamatProblem statement: E-Learning aims to apply information and communications technology to enhance and/or support learning process. Today E-Learning is one of tools for education justice. This study attempts to review on challenges and infrastructure of e-learning in developing countries specially Iran and to know what have been developed in Iran, what issues and challenges exists and what solutions make e-Learning … …American Journal of Economics and Business Administration, Vol. 3, Issue 1 · 31 Jan 2011 · 10,274 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntegration of Quantum Cryptography through Satellite Networks TransmissionSkander Aris, Abderraouf Messai, Malek Benslama et al.Problem statement: The security of the telecommunications satellite has become a crucial issue. The telecommunications can be set using the classical cryptography. But this so-called classical cryptography provides cryptographic security. This means that security is based on the difficulty of some mathematics problems. On the other hand, quantum cryptography provides security without conditions based on the law of quantum physics. … …American Journal of Applied Sciences, Vol. 8, Issue 1 · 31 Jan 2011 · 7,521 accessesView PDFCite
Research ArticleOpen accessIn the abstractOn-Chip Implementation of Pipeline Digit-Slicing Multiplier-Less Butterfly for Fast Fourier Transform ArchitectureYazan Samir Algnabi, Rozita Teymourzadeh, Masuri Othman et al.Problem statement: The need for wireless communication has driven the communication systems to high performance. However, the main bottleneck that affects the communication capability is the Fast Fourier Transform (FFT), which is the core of most modulators. Approach: This study presented on-chip implementation of pipeline digit-slicing multiplier-less butterfly for FFT structure. The approach taken; in order to reduce computation complexity … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 4 · 30 Nov 2010 · 8,016 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Bit-Serial Multiplier Architecture for Finite Fields Over Galois FieldsHero Modares, Yasser Salem, Rosli Salleh, Majid Talebi ShahgoliProblem statement: A fundamental building block for digital communication is the Public-key cryptography systems. Public-Key Cryptography (PKC) systems can be used to provide secure communications over insecure channels without exchanging a secret key. Implementing Public-Key cryptography systems is a challenge for most application platforms when several factors have to be considered in selecting the implementation platform. Approach: The most popular … …Journal of Computer Science, Vol. 6, Issue 11 · 23 Oct 2010 · 8,436 accessesView PDFCite
Research ArticleOpen accessIn the abstractInnovations in Corporate Social Responsibility from Global Business Leaders at Panasonic, Thomson Reuters and Nanyang Business SchoolMonica ThielProblem statement: Due to current varied CSR models and how CSR is presently defined and practiced differently in business and society worldwide, global CSR standards are vital to creating best practices of CSR and to increase the competitive advantage of business and society. Approach: Because most CSR business units in global organizations tend to focus on specific and narrow corporate … …American Journal of Economics and Business Administration, Vol. 2, Issue 2 · 30 Sep 2010 · 7,754 accessesView PDFCite
Research ArticleOpen accessIn the abstractExperiment of Tamper Detection and Recovery Watermarking in Picture Archiving and Communication SystemsSiau-Chuin Liew, Jasni Mohamad ZainProblem statement: Medical images such as x-rays, ultrasounds and Magnetic Resonance Imaging (MRI) plays an important role in helping the physicians to diagnose a disease or body conditions. These images can be tampered with existing image processing tools that is easily available. The usage of security measures such as watermarking can protect the integrity of the images. Numerous watermarking schemes … …Journal of Computer Science, Vol. 6, Issue 7 · 31 Jul 2010 · 7,658 accessesView PDFCite
Research ArticleOpen accessIn the abstractHistory Based Contention Window Control in IEEE 802.11 MAC Protocol in Error Prone ChannelAli Balador, Ali Movaghar, Sam JabbehdariProblem statement: IEEE 802.11 Medium Access Control (MAC) protocol is one of the most implemented protocols in this network. The IEEE 802.11 controls the access to the share wireless channel within competing stations. The IEEE 802.11 DCF doubles the Contention Window (CW) size for decreasing the collision within contending stations and to improve the network performances but it is not … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Jul 2010 · 7,667 accessesView PDFCite