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Search Results: 1 - 10 of 856 matches for " Idris Abdulrahman "
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Awareness of the Potential Threat of Cyberterrorism to the National Security  [PDF]
Abdulrahman Alqahtani
Journal of Information Security (JIS) , 2014, DOI: 10.4236/jis.2014.54013
Abstract: The revolution of computing and networks could revolutionise terrorism in the same way that it has brought about changes in other aspects of life. The modern technological era has faced countries with a new set of security challenges. There are many states and potential adversaries, who have the potential and capacity in cyberspace, which makes them able to carry out cyber-attacks in the future. Some of them are currently conducting surveillance, gathering and analysis of technical information, and mapping of networks and nodes and infrastructure of opponents, which may be exploited in future conflicts. This paper uses qualitative data to develop a conceptual framework for awareness of cyberterrorism threat from the viewpoint of experts and security officials in critical infrastructure. Empirical data collected from in-depth interviews were analysed using grounded theory approach. This study applied to Saudi Arabia as a case study.
Regulatory Role of TQM between the Marketing Orientation, Entrepreneurial Orientation and the Organizational Performance and Competitiveness  [PDF]
Abdulrahman Alsughayir
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.65061
Abstract: This review is aiming to investigate the integration of people, planning and process in a Total quality management (TQM) setting prompting organizational performance and their competitiveness. In order to compete for a good market position, organizations need to implement effective management strategies such as TQM. The term TQM is explained as “managing the entire organization so that it excels in all dimensions of products and services that are important to the customer”. However, TQM model goes beyond product, process and service quality. The objective of this review is to develop an understanding of TQM and its possible influence on organizational performance and competitiveness. This review will be looking at entrepreneurial orientation (EO), market orientation (MO), and organizational competitiveness attributes. As quality is a mixture of many interconnected efficiencies that makes the difference at the end. Likewise, quality is an organization’s first step towards market competitiveness. EO is an important factor which could lead to various advantages and added value if adequately implemented in the organization with other supportive strategic management initiatives. It is identified that the problem of organizations not accomplishing the anticipated performance through EO and MO is due to the deficiency of organizational inappropriate schemes and worthless practices. In addition, EO as alone is insufficient resource to enhance performance and achieve competitive advantages. In addition, organizational internal resources (resource base view (RBV)) are important for organizational performance. Continuous premium quality leads organizations to avail sustainable competitive position in the market. TQM, EO (internal resources) and MO (external resources) contribute to organizational intangible capabilities that lead organizations to achieve their desired performance and competitiveness. This review will look into and conceptually find why even there are sufficient literature on TQM, EO and MO available, but still the previous research have unable to provide a unambiguous and strategic avenues for practitioners to accept.
From Garbage to Biomaterials: An Overview on Egg Shell Based Hydroxyapatite
Idris Abdulrahman,Hamzat Ibiyeye Tijani,Bashir Abubakar Mohammed,Haruna Saidu,Hindatu Yusuf,Mohammed Ndejiko Jibrin,Sulaiman Mohammed
Journal of Materials , 2014, DOI: 10.1155/2014/802467
Abstract: The conversion of waste obtained from agricultural processes into biocompatible materials (biomaterials) used in medical surgery is a strategy that will add more value in waste utilization. This strategy has successfully turned the rather untransformed wastes into high value products. Eggshell is an agricultural waste largely considered as useless and is discarded mostly because it contributes to pollution. This waste has potential for producing hydroxyapatite, a major component found in bone and teeth. Hydroxyapatite is an excellent material used in bone repair and tissue regeneration. The use of eggshell to generate hydroxyapatite will reduce the pollution effect of the waste and the subsequent conversion of the waste into a highly valuable product. In this paper, we reviewed the utilization of this agricultural waste (eggshell) in producing hydroxyapatite. The process of transforming eggshell into hydroxyapatite and nanohydroxyapatite is an environmentally friendly process. Eggshell based hydroxyapatite and nanohydroxyapatite stand as good chance of reducing the cost of treatment in bone repair or replacement with little impact on the environment. 1. Introduction Agricultural waste is any waste being generated from different farming processes in accumulative concentration. Adequate utilization of agricultural waste reduces environmental problems caused by irresponsible disposal of the waste. The management of agricultural wastes is indispensable and a crucial strategy in global waste management. Waste of any kind in the environment when its concentration is in excess can become a critical factor for humans, animals, and vegetation [1]. The nature, quantity, and type of agricultural waste generated vary from country to country. The search for an effective way to properly manage agricultural waste will help protect the environment and the health quality. For sustainable development, wastes should be recycled, reused, and channelled towards the production of value added products. This is to protect the environment on one side and on the other side to obtain value added products while establishing a zero waste standard. The utilization of the waste is a priority today in order to achieve sustainable development [2]. One way that adds great value to agricultural waste is its utilization as a biomaterial used in medical surgery and therapeutics. The production of biocompatible material or biomaterial from agrowaste has added a different dimension to the utilization of agricultural waste for value added product. This is possible because some of this waste
A Simple Encryption Keys Creation Scheme in Wireless Ad Hoc Networks  [PDF]
Abdulrahman H. Altalhi
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.41011
Abstract: A mobile ad hoc network (MANET) is a collection of mobile nodes that temporarily integrate with each other to form a network. Such a network does not require the existence of a typical network infrastructure. There is no central entity with the authority to administer the services and configurations of the network. How to secure a MANET is an active field of study for researchers. However, most of the research on the topic of securing the MANETs has focused on adapting security mechanisms that were meant for traditional wired networks. This adaptation has resulted in security solutions that do not work efficiently or that make assumptions that are not in line with the properties and characterizations of MANETs. In this paper, we propose the use of security mechanisms for MANETs that are designed based on the characteristics, functionalities, and goals of such networks. We aim to initiate a paradigm shift in securing MANETs, in which the focus should be on building security solutions specifically developed for MANETs, and not on adapting solutions that were meant for conventional wired networks. We revisit the basics and propose a simple encryption keys creation scheme that is based on the Diffie-Hellman key agreement protocol. The work presented in this paper should mark the initiation of a research agenda designed to build security primitives that are specifically for MANETs, along the lines of the new paradigm.
Adoption of Innovation within Universities: Proposing and Testing an Initial Model  [PDF]
Abdulrahman Hariri, Paul Roberts
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.62017
Abstract: This study discusses the need for improvement and innovation in universities so they can effectively serve students and stay ahead in competition. Many technologies and innovations are already being used in universities. However, in order to diffuse or spread technologies or innovations effectively, it is important to understand the reasons leading to the adoption of technologies and innovations in universities. Based on a number of established theories and models on innovation and technology adoption and acceptance, this study proposes a theoretical model that helps explain the factors responsible for innovation adoption within universities. Measures for the study were adopted from previous studies, and an online questionnaire was used. Exploratory and confirmatory factor analyses were used to test and better understand the underlying structure of the proposed model. Reliability and validity of the proposed model were also examined. The initially proposed model seems to help in explaining the adoption of innovations within universities and is of value to researchers when investigating adoption within universities.
The Effect of the Challawa Industrial Estate on the Physicochemical Properties and Heavy Metal Levels of Portable Water Supply in Kano Metropolis, Nigeria  [PDF]
Abdulrahman Audu, Abdulhakeem Idowu
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.32003

It has been observed that the portable water quality obtained from various locations in Kano Metropolis has shown greater variations in the recent past. Attempts have been made to ascertain the reasons for the variations even though the supplies were from only two treatments plants that obtain their raw water from the same source. A total of 92 water samples comprising of raw (from plants) and treated (from the plants and taps) were collected during rainy and dry seasons between April 2010 and May, 2012 and analyzed using standard analytical techniques. The results of analysis gave the physiochemical properties with range as follows: pH (0.06 ± 6.7 - 6.04 ± 0.02) conductivity (7.23 ±0.04 - 13.33 ± 0.22 S/Cm), turbidity (5.00 ± 0.01 - 449.22 ±1.32 NTU), suspended solids (107.33±3.45 - 712.11 ±5.33 mg/dm3), total dissolved solids (18.50 ± 0.85 -186 .78 ± 2.48 mg/dm3 ), alkalinity (12.53± 0.32 - 80.75 ± 1.23 mg/dm3) and hardness (29.50 ± 1.22 - 58.67 ± 2.34 mg/dm3). The pH values were generally acidic while the turbidity and total solid especially in some locations were higher than the permissible levels set by the World Health Organization for portable water. The concentration of heavy metals (mg/dm3) were found in the following ranges Fe (0.10 ± 0.04 - 0.30 ± 0.02), Cu (0.01 ± 0.001 - 0.03 ± 0.002), Zn (0.13 ± 0.06 - 0.39 ±0.02), Pb (0.03 ± 0.01 - 0.17 ± 0.02), Mn (0.03 ± 0.004 - 0.13 ± 0.003), Cr (0.10 ± 0.04 - 0.31 ± 0.03). The highest values of Fe, Cu and Mn were recorded along the older distribution channel of Challawa. The levels of Pb and Cr were generally high in both routes which are also observed in the raw water used at the two treatments plants. The results obtained from heavy metal concentrations fell within the maximum allowable limit set by the World Health Organization for portable water except in the cases of Pb and Cr. The high Fe, Mn, Cu levels as obtained in the Challawa route were attributed to leaching from rusting in the old galvanized metal pipe-work in the distribution channel. The levels of chromium and lead were similar in the two networks showing that the raw water used in the both treatment plants were responsible for the high values obtained and were not effectively removed by the treatment processes.

Effects of Long-Term Use of Flavonoids on the Absorption and Tissue Distribution of Orally Administered Doses of Trace Elements in Rats  [PDF]
Ausama Ayoob Jaccob, Saad Abdulrahman Hussain, Saad Abdulrahman Hussain
Pharmacology & Pharmacy (PP) , 2012, DOI: 10.4236/pp.2012.34065
Abstract: The risk of pharmacokinetic polyphenols-trace elements interaction may undesirable therapeutic outcomes. We evaluate the long-term use of silibinin, epigallocatechin (ECGC), quercetin and rutin on the absorption and tissue distribution of zinc, copper and iron after single oral doses in rats. Five groups of rats were either with olive oil as control or with one of the polyphenols silibinin, EPGC, quercetin or rutin, administered orally as oily solutions for 30 days. At day 30, a solution contains sulphate salt of zinc, copper and iron was administered orally; 3 hrs later blood samples, tissues of brain, kidney and liver were obtained for evaluation of the elements levels. The results showed that the polyphenols increased both serum and tissue levels of these elements compared with controls. This effect was relatively varied according to the structural differences among flavonoids. In conclusion, long-term use of supraphysiological doses of flavonoids increase absorption of Zn, Cu and Fe and their tissue availability in brain, kidney and liver; this effect seems to be different with variations in structural features.
Effect of Pleurotus ostreatus on hyperglycemia, DNA damage and chromosomes aberrations  [PDF]
Abdulrahman L. Al-Malki
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.511082
Abstract: One of the main health problems with high and markedly increased complications is diabetes. Despite several projects with preventative strategies and armories of medication, the arrangement of diabetes remains grossly unsatisfactory. Thus, it is vital to identify unfamiliar drugs or novel nutraceuticals for treating and preventing diabetes without side effects. The present study deals with scientific information on mushrooms with regards to its potential use as anti-diabetic active food. In addition to the anti-hyperglycemic action of mushrooms, the present study presents its effect on DNA damage, chromosome aberrations and sperm alternations in streptozotocin-induced diabetic rats. These animals have been treated, for 30 days, with amaryl (as control treatment) (0.03 mg/kg·b·wt/dl), low-dose mushroom (100 mg/kg·b·wt/dl) and high-dose mushroom (200 mg/ kg·b·wt/dl). The glucose level GL of streptozotocin-induced diabetic animals has been markedly improved by mushroom treatment; for example GL has decreases from 167.6 mg/dl down to 116.0 mg/dl for treatment with high-dose mushroom and 128.9 mg/dl for treatment with low-dose mushroom, comparing with amaryl treatment that decreases GL down to 92.6 mg/dl. But, the experimental results show that treatment with mushroom is better than treatment with amaryl in case of genetic changes (DNA fragmentation, disappear of some base pairs and chromosome aberrations. So, it is proposed that more close scientific attention be paid to precede more research of functional mushrooms for preventive and curative treatments for diabetes.
Further Evidence for Arabic Basic Colour Categories  [PDF]
Abdulrahman S. Al-rasheed
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.515179
Abstract: The aim of this study was to describe the basic colour terms (BCTs) of Arabic and, in particular, clarify the relationship among the three Arabic terms for blue: azrock, samawee, and khuhlie that suggested a BCTs in Arabic language in Al-rasheed et al. (2013). Data were collected from adult native Arabic speakers (30 male and 27 female) age between 18 and 34 years old, with a mean age of 21.67 years (SD = 2.98). All were under and postgraduate students at King Saud University. Participants task was to group the 320 colours by similarity. Based on this result, Arabic probably has eleven basic colour terms and these correspond with Berlin and Kay’s eleven universal categories. The terms are that ahmar “red”, akhdar “green”, asfer, “yellow”, azrock “blue”, asswed “black”, abiyadh “white”, banafsagee “purple”, boartoogaalee “orange”, bonee “brown”, wardee “pink” and rassasee. In addition, the terms of particular interest—samawee (“light blue”) had the next highest claim to being basic and may deserve further investigating.
Design and Analysis of Some Third Order Explicit Almost Runge-Kutta Methods  [PDF]
Abdulrahman Ndanusa, Khadeejah James Audu
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.71002
Abstract: In this paper, we propose two new explicit Almost Runge-Kutta (ARK) methods, ARK3 (a three stage third order method, i.e., s = p = 3) and ARK34 (a four-stage third-order method, i.e., s = 4, p = 3), for the numerical solution of initial value problems (IVPs). The methods are derived through the application of order and stability conditions normally associated with Runge-Kutta methods; the derived methods are further tested for consistency and stability, a necessary requirement for convergence of any numerical scheme; they are shown to satisfy the criteria for both consistency and stability; hence their convergence is guaranteed. Numerical experiments carried out further justified the efficiency of the methods.
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