Arab Open University

About: Arab Open University is a education organization based out in Muscat, Oman. It is known for research contribution in the topics: Computer science & The Internet. The organization has 271 authors who have published 513 publications receiving 5468 citations.

Toward Massive Machine Type Cellular Communications

Abstract: Cellular networks have been engineered and optimized to carrying ever-increasing amounts of mobile data, but over the last few years, a new class of applications based on machine-centric communications has begun to emerge. Automated devices such as sensors, tracking devices, and meters, often referred to as machine-to-machine (M2M) or machine-type communications (MTC), introduce an attractive revenue stream for mobile network operators, if a massive number of them can be efficiently supported. The novel technical challenges posed by MTC applications include increased overhead and control signaling as well as diverse application-specific constraints such as ultra-low complexity, extreme energy efficiency, critical timing, and continuous data intensive uploading. This article explains the new requirements and challenges that large-scale MTC applications introduce, and provides a survey of key techniques for overcoming them. We focus on the potential of 4.5G and 5G networks to serve both the high data rate needs of conventional human-type communication (HTC) subscribers and the forecasted billions of new MTC devices. We also opine on attractive economic models that will enable this new class of cellular subscribers to grow to its full potential.

Self-adaptive differential evolution

Abstract: Differential Evolution (DE) is generally considered as a reliable, accurate, robust and fast optimization technique. DE has been successfully applied to solve a wide range of numerical optimization problems. However, the user is required to set the values of the control parameters of DE for each problem. Such parameter tuning is a time consuming task. In this paper, a self-adaptive DE (SDE) is proposed where parameter tuning is not required. The performance of SDE is investigated and compared with other versions of DE. The experiments conducted show that SDE outperformed the other DE versions in all the benchmark functions.

Determinants of audit report lag: Does implementing corporate governance have any impact? Empirical evidence from Egypt

Abstract: Purpose – There are three main purposes of this study which are: first, to review the literature on audit report lag (ARL) and its determinants; second, to measure the extent of ARL in a developing country, Egypt; and third, to empirically examine the impact of corporate governance (CG) characteristics on ARL in Egypt.Design/methodology/approach – The literature on determinants of ARL motivated the author to investigate about the impact of CG characteristics and audit‐related characteristics on ARL especially in emerging capital markets, such as the Cairo and Alexandria Stock Exchange (CASE) for a sample (85 companies) of Egyptian listed companies. Further, the study includes explanatory variables relating to CG characteristics, which have not previously been considered (i.e. board independence, duality of chief executive officer (CEO), and existence of an audit committee), that may shed more light on the structure and dynamics of the ARL.Findings – The ARL for each of the 85 listed sample companies range...