The University of Sharjah is an Emirati private non-profit national university located in University City, Sharjah, United Arab Emirates. It was established on 1997 by its founder, supreme president and chairman, the ruler of Sharjah HH Sheikh Dr. Sultan bin Mohamed Al-Qasimi to meet the emirate of Sharjah's aim of educational needs. The university goals constitute of becoming a leading academic institution in the Middle East and around the world. In addition to its main campus in Sharjah City, the university has built campus facilities to provide education and training programs directly to several communities throughout the emirate. Most significantly, the university plays an important role in the socioeconomic development of the emirate of Sharjah.The main campus for the University is located on the southern edge of Sharjah in University City, which is in close proximity to the Sharjah International Airport. The University of Sharjah extends its services through five branches located in different geographic areas in the emirate of Sharjah such as Khor Fakkan, Kalba, Meleha, and Dibba Al-Hisn. Wikipedia.
Alami A.H.,University of Sharjah
Energy Conversion and Management | Year: 2014
The output decline of solar photovoltaic modules as their temperature increase during operation is a major concern for developers and users. This paper investigates the utilization of a passive evaporative cooling technique to control the temperature rise of PV modules that occurs due to the absorption of solar irradiance. The method involves incorporating a layer of synthetic clay to the back of the module and allowing a thin film of water to evaporate, and thus reducing the module temperature. The results have proven the technical feasibility of the proposed approach by exhibiting a maximum increase of 19.4% to the output voltage and 19.1% to the output power. The incorporation of clay is very effective, cheap, silent and environmentally friendly. © 2013 Elsevier Ltd. All rights reserved.
Al-Aomar R.,University of Sharjah
Journal of the Franklin Institute | Year: 2011
This paper describes a simulation-based approach for developing a lean production system of multi-lean measures. Three lean measures are defined to characterize the leanness of the underlying production system: productivity, cycle time, and work-in-process inventory. An optimized setting to certain operational parameters is determined so that a best tradeoff of the three lean measures is reached. The problem formulation results in a multi-objective optimization problem with no closed-form definition of problem objective functions and constraints. The solution approach utilizes Discrete Event Simulation (DES) to deploy lean techniques and model lean measures under process variability and plant constraints and dynamics. A direct search method (i.e., Simulated Annealing (SA)) is used to search of problem domain. A model-based Value Mapping (VM) is used for combining the conflicting multi-lean measures and guiding the SA search for optima. The DES model is also used to develop a future state dynamic Value Stream Map (VSM) of the optimized production process. The approach is applied to an example production system where the capacity of material handling conveyors and the size of maintenance crew are optimized to develop a lean system in terms of three lean measures. Little's formula is used to verify the simulation assessment of lean measures. Optimization results are also used to demonstrate the conflict among lean measures, the impact of process variability on lean measures, and the role of VM in reaching an efficient tradeoff of multi-lean measures. © 2010 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
Gazzah H.,University of Sharjah
IEEE Transactions on Signal Processing | Year: 2011
Second-order blind algorithms have in common a complexity that is cubic in both the channel order and the number of receiving antennas. We present an original technique that converts (the problem of equalizing) a (multiple) channel into (that of) an equivalent channel with an impulse response shorter by one or more taps. This reversible transformation involves a negligible complexity and is repeated until a zero-order channel is obtained, hence achieving zero-forcing equalization. The overall complexity of this deterministic iterative technique is quadratic in the channel order. Simulations with a limited number of snapshots show that performance is comparable to other second-order techniques. © 2006 IEEE.
Jaffar A.A.,University of Sharjah
Anatomical Sciences Education | Year: 2012
The use of online social networks in medical education can remodel and enhance anatomy teaching and learning; one such network is the video-sharing site YouTube. Limited research in the literature exists on the use of YouTube as a platform for anatomy education. The aim of this study is to assess student's perceptions and patterns of usage of this resource, as well as the effectiveness of YouTube videos within a problem-based learning (PBL) curriculum. The study was conducted on 91 second-year medical students for whom video links were suggested throughout the academic year. In addition, the Human Anatomy Education (HAE) Channel was launched on YouTube to support classroom teaching with videos that emphasized applied aspects of anatomy. The results demonstrated that 98% of the students used YouTube as an online information resource, albeit in different frequencies. Out of the 86% who have been to the HAE Channel, 92% agreed/strongly agreed that the channel helped them learn anatomy. The study also reports the popularity of and awareness about using YouTube as a social network as well as in learning. Based on these findings, YouTube can be considered as an effective tool to enhance anatomy instruction if the videos are scrutinized, diversified, and aimed toward course objectives. Faculty of average computer literacy should be enabled to produce videos on their own YouTube channels to support independent learning and integration in a PBL curriculum. The methods described for capturing and editing the videos can be used as a prototype. © 2012 American Association of Anatomists.
Saad M.,University of Sharjah
IEEE Transactions on Wireless Communications | Year: 2014
Given a multihop wireless network and a source-destination pair of nodes, this paper addresses the problem of jointly selecting a communication route and allocating transmit power levels, so that the end-to-end spectral efficiency of the route exceeds a desired threshold. Spectral-efficient routing has been subject to interest in the recent literature. The transmit power level, however, has been assumed to be known, and route selection was considered in isolation. This paper presents the first rigourously proven optimal, polynomial-time algorithms for two versions of the joint spectral-efficient routing and power allocation problem: sum-power minimization and maximum power minimization. The proposed algorithms rely on the divide-and-conquer principle and the Bellman-Ford algorithm for shortest (or widest) path computation. Our computational results further illustrate the efficiency of the proposed approach. © 2002-2012 IEEE.
Goh F.G.,University of Sharjah |
Midwood K.S.,Imperial College London
Rheumatology | Year: 2012
RA is a debilitating disorder that manifests as chronic localized synovial and systemic inflammation leading to progressive joint destruction. Recent advances in the molecular basis of RA highlight the role of both the innate and adaptive immune system in disease pathogenesis. Specifically, data obtained from in vivo animal models and ex vivo human tissue explants models has confirmed the central role of Toll-like receptors (TLRs) in RA. TLRs are pattern recognition receptors (PRRs) that constitute one of the primary host defence mechanisms against infectious and non-infectious insult. This receptor family is activated by pathogen-associated molecular patterns (PAMPs) and by damage-associated molecular patterns (DAMPs). DAMPs are host-encoded proteins released during tissue injury and cell death that activate TLRs during sterile inflammation. DAMPs are also proposed to drive aberrant stimulation of TLRs in the RA joint resulting in increased expression of cytokines, chemokines and proteases, perpetuating a vicious inflammatory cycle that constitutes the hallmark chronic inflammation of RA. In this review, we discuss the signalling mechanisms of TLRs, the central function of TLRs in the pathogenesis of RA, the role of endogenous danger signals in driving TLR activation within the context of RA and the current preclinical and clinical strategies available to date in therapeutic targeting of TLRs in RA. © The Author 2011. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved.
Al-Rawi N.H.,University of Sharjah
Diabetes and Vascular Disease Research | Year: 2011
Background: The aim of this study was to assess the salivary content of lipid peroxidation and antioxidants in patients with type 2 diabetes. Method: We studied 25 patients with type 2 diabetes and other 25 age- and sex-matched health control. To evaluate the oxidative status we measured the levels of malondialdehyde (MDA) in the saliva and serum of all participants. Lipid profile was also estimated through measuring total cholesterol, triglycerides, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and very low-density lipoprotein cholesterol (VLDL-C) levels. Antioxidant levels were also assessed through measuring the salivary and serum concentration of uric acid, superoxide dismutase and reduced glutathione (GSH). Results: The high concentration of lipid fractions in saliva usually follows that recorded in serum. Salivary MDA levels, a product of lipid peroxidation, were significantly increased among diabetics together with uric acid. However, GSH levels were similar to those of the control group. Conclusion: Lipid peroxidation and antioxidant parameters assessed in saliva of diabetic patients may be of great importance in evaluating the disease activity and severity. The increase in lipid peroxidation and the tendency of antioxidants to rise in diabetes is probably due to an adaptive response to the pro-oxidant status of diabetes. © The Author(s) 2011.
Agamy E.,University of Sharjah
Ecotoxicology and Environmental Safety | Year: 2012
With the heavy transport of crude oil there is an increasing risk of a major oil spill in the Gulf waters; however, there have been few studies on the impact of oil spills and subsequent remedial action on Gulf fish. The aim of the experiment was to investigate the effects of acute exposure to water soluble fraction (WAF) of light Arabian crude oil, dispersed oil and dispersant on the liver of the juvenile rabbit fish (Siganus canaliculatus), observing several histopathological biomarkers of the liver at different time points and different doses. The concentrations used (3-100 percent WAF) simulated a range of possible oil pollution events. The main alterations observed in this study include hepatocyte swelling and cytoplasmic vacuolisation, megalocytosis, coagulative dispersed necrosis, lymphocytic infiltration, melanomacrophage aggregates, spongiosis hepatis, pericholangiitis, and bile stagnosis. Treated livers showed significantly higher total index values than the control group (p<0.01). According to the total liver index, liver exposed to WAF, dispersed oil or dispersant showed significant histopathologic alterations compared with the control fish (Mann-Whitney U-test; p<0.01). Components of the total liver index, (circulatory, degenerative, proliferative, and inflammatory changes) differed significantly from the control groups. There was a significant correlation between exposure time and the total liver index values and the different reaction pattern indexes of treated fish (Spearman correlation; p>0.05). The present study indicates that dispersed oil is not more toxic, to livers of juvenile rabbit fish, than crude oil or dispersant. © 2011 Elsevier Inc.
Elwakil A.S.,University of Sharjah
IEEE Circuits and Systems Magazine | Year: 2010
A recent article published in this magazine  has labeled fractional-order continuous-time systems as the "21st century systems". Indeed, this emerging research area is slowly gaining momentum among electrical engineers while its deeply rooted mathematical concepts also slowly migrate to various engineering disciplines. A very important aspect of research in fractional-order circuits and systems is that it is an interdisciplinary subject. Specifically, it is an area where biochemistry, medicine and electrical engineering over-lap giving rise to many new potential applications. © 2010 IEEE.
Jaffar A.A.,University of Sharjah
Anatomical Sciences Education | Year: 2014
Facebook is the most popular social media site visited by university students on a daily basis. Consequently, Facebook is the logical place to start with for integrating social media technologies into education. This study explores how a faculty-administered Facebook Page can be used to supplement anatomy education beyond the traditional classroom. Observations were made on students' perceptions and effectiveness of using the Page, potential benefits and challenges of such use, and which Insights metrics best reflect user's engagement. The Human Anatomy Education Page was launched on Facebook and incorporated into anatomy resources for 157 medical students during two academic years. Students' use of Facebook and their perceptions of the Page were surveyed. Facebook's "Insights" tool was also used to evaluate Page performance during a period of 600 days. The majority of in-class students had a Facebook account which they adopted in education. Most students perceived Human Anatomy Education Page as effective in contributing to learning and favored "self-assessment" posts. The majority of students agreed that Facebook could be a suitable learning environment. The "Insights" tool revealed globally distributed fans with considerable Page interactions. The use of a faculty-administered Facebook Page provided a venue to enhance classroom teaching without intruding into students' social life. A wider educational use of Facebook should be adopted not only because students are embracing its use, but for its inherent potentials in boosting learning. The "Insights" metrics analyzed in this study might be helpful when establishing and evaluating the performance of education-oriented Facebook Pages. Anat Sci Educ 7: 199-208. © 2013 American Association of Anatomists.