Khartoum, Sudan

Nile Valley University

www.nilevalley.edu.sd
Khartoum, Sudan

Nile Valley University or Wadi El-Neel University is a public university located in Khartum Sudan.It was founded in 1990.Nile Valley University is a member of the Federation of the Universities of the Islamic World.As of September 2011, the university was a member in good standing of the Association of African Universities. Wikipedia.

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Ali Hamed S.M.,Nile Valley University
IEEE Transactions on Antennas and Propagation | Year: 2013

A new technique is introduced for evaluating the vector potential of circular loop antennas (CLAs) with arbitrary current distribution and dimensions, which can be used to obtain the exact electromagnetic fields in near and far regions of the antenna. The technique is based on the spherical Bessel functions (SBFs) and associated Legendre polynomials (ALPs) expansion. This expansion is used to decouple the azimuth variables of the integrand of the vector potential integrals from the other variables in a separate functions that depend exponentially on azimuth variables. This technique reduces greatly the mathematical operations for evaluation of the vector potential to only one simple integration. The technique is used to obtain exact electromagnetic fields expressions for a thin-wire CLA of arbitrary current distribution and dimension, which is valid everywhere except on the loop. The well known far-fields for the CLA of arbitrary current distribution as well as near and far-fields for uniform current loop and small loop are obtained from the general field expressions presented in this paper as an special cases. © 2013 IEEE.


Ali Hamed S.M.,Nile Valley University | Abbas M.A.H.,University of Khartoum
IEEE Transactions on Antennas and Propagation | Year: 2012

A hybrid procedure to study the characteristics of the circular loop antenna (CLA) placed coaxially relative to a conducting body of revolution (CBOR) is presented. The procedure uses the well known theory for the thin wire CLA analysis that is based on Fourier series expansion, with the analysis based on numerical computation of Green's functions for bodies of revolution. The procedure is general and can be applied to study the characteristics of CLA placed coaxially relative to any CBOR. The input admittance computed using this procedure for loop/sphere case is in good agreement with published results. © 1963-2012 IEEE.


Husain N.E.,University of Khartoum | Hassan A.T.,Blue Nile Pharmaceutical | Elmadhoun W.M.,Nile Valley University | Ahmed M.H.,Foundation Medicine
Expert Opinion on Drug Safety | Year: 2015

Introduction: The combination of ezetimibe and atorvastatin (Liptruzet - referred to in this article as eze/ator), has recently been approved by the FDA for reducing low-density lipoprotein cholesterol (LDL-c) in patients with primary or mixed hyperlipidemia as in case of homozygous familial hypercholesterolemia. It helps block intestinal absorption of cholesterol and it inhibits the production of cholesterol in the liver.Areas covered:The safety and effectiveness of the eze/ator combination as treatment of hyperlipidemia. Medline was searched for atorvastatin and/or ezetimibe.Expert opinion:The combination of (eze/ator) is proven to be effective in lowering LDL-c. It is not only a safe and effective treatment of hyperlipidemia, but it also reduces inflammatory markers and atherosclerosis. It is not yet clear, however, whether the combination therapy can decrease the risk of diabetes associated with statin administration. Insulin sensitivity is improved by the single administration of ezetimibe, a finding that is documented by several clinical and animal studies. More specifically, ezetimibe has been shown to decrease insulin resistance associated with nonalcoholic fatty liver disease (NAFLD). The effects of combination therapy that have to be explored in future research and clinical trials include whether this combination can be used in the treatment of NAFLD, cholesterol gallstones and portal hypertension. © 2015 © Informa UK, Ltd.


Hamed S.M.A.,Nile Valley University
IEEE Transactions on Antennas and Propagation | Year: 2014

The author would like to thank the commentators, Dr. Zheng and Dr. Li, for reviewing and commenting on the work reported in [1]. The author disagrees with their conclusion that the author in [1] is 'criticizing the merits' of their published papers. The author is merely explaining the differences between the author's work in [1] and the commentators' work reported in [2]. This should not detract from the contribution they made in [2] as indicated in their comments. © 1963-2012 IEEE.


Hamed S.M.A.,Nile Valley University | Bashir S.O.,International Islamic University Malaysia
Proceedings - 2015 International Conference on Computing, Control, Networking, Electronics and Embedded Systems Engineering, ICCNEEE 2015 | Year: 2015

This paper presents a new exact series for modal Green's function that arises when solving the problems of electromagnetic scattering from bodies of revolution. The accuracy and computation time of the series are compared with results from numerical integration. The results using the series are in excellent agreement with those from integration. Moreover, results show that the computation time using the series is better compared to that using the integration. © 2015 IEEE.


Ali M.O.,Nile Valley University | Elfadil O.M.,University of Khartoum
Proceedings - 2015 International Conference on Computing, Control, Networking, Electronics and Embedded Systems Engineering, ICCNEEE 2015 | Year: 2015

In this article, we implemented a watermarking system to be modeled as a System-on-Chip (SoC). The implemented system is designed according to the embedding algorithm which we had proposed in [1]. The implemented system is designed to embed invisible watermark in spatial domain of digital images. Through this work we would like to focus on hardware implementation details that miss mentioned in our article [2]. The chip interface and testing are shown in this article. The system is modeled by using Xilinx ISE 9.2i and coded by Verilog HDL. The proposed system is useful and has a high level of reliability to authenticate digital images. © 2015 IEEE.


Hamed S.M.A.,Nile Valley University | Bashir S.O.,International Islamic University Malaysia
Proceedings - 2013 International Conference on Computer, Electrical and Electronics Engineering: 'Research Makes a Difference', ICCEEE 2013 | Year: 2013

A technique that is based on spherical wave functions expansion for the free space Green's function is used to derive exact near and far electromagnetic fields expressions for traveling wave circular loop antennas (TW-CLAs) with arbitrary phase change. These expressions describe separately electromagnetic fields inside and outside a sphere that generated when the loop revolves about its diameter. This makes the investigation of fields in the near region and inside the loop antenna simpler. Furthermore, a simplified expressions for the magnetic fields along the axis of the antenna and the known far-fields expressions for TW-CLA are obtained as special cases of the general field expressions presented in this paper. © 2013 IEEE.


Ali Hamed S.M.,Nile Valley University | Bashir S.O.,International Islamic University Malaysia
IEEE Antennas and Wireless Propagation Letters | Year: 2013

The performance of the circular loop antenna (CLA) largely improves in terms of impedance matching and directive gain when a body of revolution (BOR)-type of reflector is placed symmetrically relative to the loop. The input impedance, reflection coefficient, VSWR, directivity, and radiation patterns of a loop antenna for cases of a reflector-hemisphere and a reflector-cone are investigated in this letter. It is found that for a resonant loop, directivity over 9 dB and VSWR less than 2 over a bandwidth of 48.5 MHz can be obtained. The study also shows that the characteristics of the CLA depend mainly on the height of the loop over the reflector and the total surface area of the reflector-body irrespective of the body shape. © 2002-2011 IEEE.


Osman A.A.,Folsom Labs | Hamed S.M.A.,Nile Valley University
Proceedings - 2015 International Conference on Computing, Control, Networking, Electronics and Embedded Systems Engineering, ICCNEEE 2015 | Year: 2015

Exact magnetic field expressions are derived for a system of concentric circular-loops antenna above a perfectly electric conducting (PEC) ground plane in this paper. The current distributions and dimensions of the loops are arbitrary. Simplified expressions for the antenna with uniform current loops and the fields on the axis of the antenna are obtained as special cases from the general expressions. Moreover, the static magnetic fields f000or concentric current loops are obtained from the general expressions by letting the propagation constant approaching zero. The numerical results from the field expressions presented in this paper are in excellent agreement to those from AN-SOF simulation software, which check the correctness of these expressions. © 2015 IEEE.


Hypertension is a non-communicable disease of increasing importance in developing countries. Due to its silent nature and serious complications, active screening is essential in case detection. The aim of this study was to determine the prevalence of undiagnosed hypertension and to find out whether there are ethnic variations in prevalence between two Sudanese ethnicities. This is a cross-sectional community-based study in which 100 subjects from Nuba tribe and 70 Coptics not previously known to have hypertension volunteered to participate. Blood pressure was measured and a questionnaire delineating demographic, clinical and social data was obtained from each participant. Female to male ratio was 2:1. The mean age was 39.5 ± 8 years for Nubians and 40.5 ± 5.5 years for Coptics. High blood pressure was detected in 48% of Nubians and 24.3% of Coptics (p>0.001). The prevalence of stage II hypertension was higher in Nubians compared to Coptics (25% vs. 3.8%; p<0.001). Besides the ethnic variation, other significant differences between the two groups were illiteracy and alcohol consumption, both of which were significantly commoner among Nubians. Undiagnosed high blood pressure is common in our local community, with some variations in prevalence and severity among different ethnic groups. Key words: Coptics; Nubians; River Nile State; Sudan; Undiagnosed hypertension.

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