The University of Nizwa was established in 2002 by the Decree of Sultan Qaboos as the first non-profit university in the Sultanate of Oman; it remains the only institution of its kind in the nation. Upon the satisfaction of all requirements set forth by the Ministry of Higher Education and the Higher Education Council, the University of Nizwa was granted legal status by ministerial decision No. 1/2004 on January 3, 2004. On October 16, 2004, the University of Nizwa opened the doors to its inaugural class of 1,200 students, 88% of whom were Omani women. The current campus is located near the base of the famous Jabal al-Akhdhar in Birkat al-Mouz, 20 km NW of Nizwa. The construction of a new campus, located near the new Farq-Hail highwa began in March 2010. Still unaccredited with lower ranking, the university is currently in the final stage of institutional accreditation in accordance with the academic standards established by the Oman Academic Accreditation Authority. Wikipedia.
Nasir Uddin M.,University of Malaya |
Daud W.M.A.W.,University of Malaya |
Abbas H.F.,The University of Nizwa
Renewable and Sustainable Energy Reviews | Year: 2013
The objective of this paper is to develop more favorable hydrogen energy that holds the potential to realize zero-carbon emissions, thereby negating concerns over global warming and promoting an outlook free of the dependency on fossil fuels. Pyrolytic gas has much H2, CO2, CO, and light hydrocarbons, such as CH4, C2H6, etc., as non-condensable gases (NCGs), which offer the potential for use in industrial, power and transportation fields. This paper emphasizes the influence of biomass characteristics and compositions, moisture content, particle size, heating rate, temperature, reactor system, and carrier gases and catalysts on the production of hydrogen and NCG. The composition of the NCGs varies widely depending on the properties of the biomass and moisture content, which play key roles on the mole fraction of hydrogen in the final products. A small particle size is favorable in the chemically controlled pyrolysis process for hydrogen production, while the reformation of NCGs into H2 via a shift reaction is significant in increasing the total hydrogen formation in the presence of catalysts. A great deal of effort has been directed towards the system carrier gas in terms of hydrogen production, because it enhances the secondary decomposition reaction. Thermo-chemical and biological processes for hydrogen production from sustainable energy sources are also reviewed. In order to predict the maximum hydrogen formation of a given feedstock, the extent to which the processes are dependent on the heating rate and the temperature of the biomass in the reactor is investigated. It is our belief that this is a crucial assessment in establishing a link and developing a learning strategy between networks of biomass to hydrogen transformation-related activities and in assessing the current economic status of this pyrolysis process in achieving the ultimate hydrogen energy source. © 2013 Elsevier Ltd.
Ezzat M.A.,Alexandria University |
El Karamany A.S.,The University of Nizwa
European Journal of Mechanics, A/Solids | Year: 2011
A new mathematical model of electro-thermoelasticity has been constructed in the context of a new consideration of heat conduction with fractional order. The state space approach developed in Ezzat (2008) is adopted for the solution of one-dimensional problem in the presence of heat sources. The Laplace transform technique is used. A numerical method is employed for the inversion of the Laplace transforms. According to the numerical results and its graphs, conclusion about the new theory has been constructed. Some comparisons have been shown in figures to estimate the effects of the fractional order parameter on all the studied fields. © 2011 Elsevier Masson SAS. All rights reserved.
Al-Hemyari Z.A.,The University of Nizwa
Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability | Year: 2010
The Weibull failure model is considered in this paper. Some testimators are proposed of the scale parameter (β) and of the reliability function (R(t)) using life-testing data when a prior value about the unknown parameter (β) is available. The expressions for the bias, mean squared error and relative efficiency are obtained and compared with existing estimators.
Thomas S.,The University of Nizwa
Nutrition Research | Year: 2012
Resveratrol is a naturally occurring polyphenolic compound. Numerous animal studies have been reported on its wide-ranging beneficial effects in the biological system including diabetes mellitus (DM). We hypothesized, therefore, that oral supplementation of resveratrol would improve the glycemic control and the associated risk factors in patients with type 2 diabetes mellitus (T2DM). The present clinical study was therefore carried out to test the hypothesis. Sixty-two patients with T2DM were enrolled from Government Headquarters Hospital, Ootacamund, India, in a prospective, open-label, randomized, controlled trial. Patients were randomized into control and intervention groups. The control group received only oral hypoglycemic agents, whereas the intervention group received resveratrol (250 mg/d) along with their oral hypoglycemic agents for a period of 3 months. Hemoglobin A1c, lipid profile, urea nitrogen, creatinine, and protein were measured at the baseline and at the end of 3 months. The results reveal that supplementation of resveratrol for 3 months significantly improves the mean hemoglobin A1c (means ± SD, 9.99 ± 1.50 vs 9.65 ± 1.54; P < .05), systolic blood pressure (mean ± SD, 139.71 ± 16.10 vs 127.92 ± 15.37; P < .05), total cholesterol (mean ± SD, 4.70 ± 0.90 vs 4.33 ± 0.76; P < .05), and total protein (mean ± SD, 75.6 ± 4.6 vs 72.3 ± 6.2; P < .05) in T2DM. No significant changes in body weight and high-density lipoprotein and low-density lipoprotein cholesterols were observed. Oral supplementation of resveratrol is thus found to be effective in improving glycemic control and may possibly provide a potential adjuvant for the treatment and management of diabetes. © 2012 Elsevier Inc.
Usman M.,University of Malaya |
Wan Daud W.M.A.,University of Malaya |
Abbas H.F.,The University of Nizwa
Renewable and Sustainable Energy Reviews | Year: 2015
This review will explore the influences of the active metal, support, promoter, preparation methods, calcination temperature, reducing environment, particle size and reactor choice on catalytic activity and carbon deposition for the dry reforming of methane. Bimetallic (Ni-Pt, Ni-Rh, Ni-Ce, Ni-Mo, Ni-Co) and monometallic (Ni) catalysts are preferred for dry reforming compared to noble metals (Rh, Ru and Pt) due to their low-cost. Investigation of support materials indicated that ceria-zirconia mixtures, ZrO2 with alkali metals (Mg2+, Ca2+, Y2+) addition, MgO, SBA-15, ZSM-5, CeO2, BaTiO3 and Ca0.8Sr0.2TiO3 showed improved catalytic activities and decreased carbon deposition. The modifying effects of cerium (Ce), magnesium (Mg) and yttrium (Y) were significant for dry reforming of methane. MgO, CeO2 and La2O3 promoters for metal catalysts supported on mesoporous materials had the highest catalyst stability among all the other promoters. Preparation methods played an important role in the synthesis of smaller particle size and higher dispersion of active metals. Calcination temperature and treatment duration imparted significant changes to the morphology of catalysts as evident by XRD, TPR and XPS. Catalyst reduction in different environments (H2, He, H2/He, O2/He, H2-N2 and CH4/O2) indicated that probably the mixture of reducing agents will lead to enhanced catalytic activities. Smaller particle size (<15 nm) had a significant influence on the suppression of carbon deposition and catalytic activity. Fluidized bed reactor exhibited the highest activity and stability, lower carbon deposition and higher conversion compared to a fixed-bed reactor. Moreover, membrane reactor, solar reactor, high-pressure reactor and microreactor were also investigated with specific features such as: pure H2 production, detailed reaction information with enhanced safety, higher pressure applications and dry reforming reaction with/without catalyst under sunlight. The study of parameters would improve the understanding of various preparation and reaction conditions leading to various catalytic activities. © 2015 Elsevier Ltd. All rights reserved.