Elminshawy N.A.S.,Port Said University |
Siddiqui F.R.,Islamic University of Madinah |
Addas M.F.,Islamic University of Madinah
Energy Conversion and Management | Year: 2016
This paper investigates the technical and economic feasibility of using a hybrid solar-geothermal energy source in a humidification-dehumidification (HDH) desalination system. The newly developed HDH system is a modified solar still with air blower and condenser used at its inlet and outlet respectively. A geothermal water tank in a temperature range 60–80 °C which imitates a low-grade geothermal energy source was used to supply heat to water inside the humidification chamber. The experiments were conducted in January 2015 under the climatological conditions of Madinah (latitude: 24°33′N, longitude: 39°36′0″E), Saudi Arabia to study the effect of geothermal water temperature and flow rate on the performance and productivity of proposed desalination system. Analytical model was also developed to compare the effect of solar energy and combined solar-geothermal energy on accumulated productivity. Daytime experimental accumulated productivity up to 104 L/m2 and daily average gained output ratio (GOR) in the range 1.2–1.58 was achieved using the proposed desalination system. Cost of fresh water produced using the presented desalination system is 0.003 USD/L. © 2016
Bhatti A.Q.,Islamic University of Madinah |
Bhatti A.Q.,National University of Sciences and Technology
Energy and Buildings | Year: 2016
Structural Concrete Insulated Panel is a special type of Sandwich Panel or Structural Insulated Panel (SIP) which is composed of thick layer of foam (polystyrene or polyurethane) and welded GI Wire mesh crossed between the foam sandwiched between two layers of shotcreting (1.5 in. thick on each side). Wall panels and Roof Panels are manufactured in 4 ft. in width and 8 ft. height, available in thicknesses range of 2–6″. The conventional building system take much longer time for construction and also it is very poor in terms of energy conservation as compare to Sandwich Panel of Structural Insulated Panel (SCIP) building. According to a conservative estimate, buildings consume more than 40% of the total electricity produced. The demand of this sector is growing at the rate of almost 14% per annum, the highest among all other sectors. To cope up with the challenges of the construction industry, energy efficient fast construction buildings solution is indispensable. A typical school building using Sandwich Panel Insulated Building was modelled and analyzed using SAP2000 software and its results were analyzed and examined. © 2016 Elsevier B.V.
Mazhar A.,Islamic University of Madinah
Chinese Physics Letters | Year: 2015
We study the robustness of genuine multipartite entanglement for a system of three qubits under collective dephasing. Using a computable entanglement monotone for multipartite systems, we find that almost every state is quite robust under this type of decoherence. We analyze random states and weighted graph state s at infinityand find all of them to be genuinely entangled. © 2015 Chinese Physical Society and IOP Publishing Ltd.
Ali M.,Islamic University of Madinah
Chinese Physics B | Year: 2015
We study decoherence effects on genuine multipartite entanglement for three and four qubits, spatially separated and subjected to local Lorentzian reservoirs. Employing recent techniques to compute genuine negativity for multipartite systems and an exact solvable model, we analyze the dynamics of genuine entanglement for different coupling bandwidths and detunings. We find that collapses and revivals can occur by varying these parameters for various multipartite quantum states. © 2015 Chinese Physical Society and IOP Publishing Ltd.
Rashdan M.,Islamic University of Madinah
Physical Review C - Nuclear Physics | Year: 2013
The fusion cross sections, barrier, and spin distributions of stable and unstable nuclei are investigated through a coupled-channel approach using a density and energy-dependent effective Brueckner G-matrix interaction. Calculations are carried out for the fusion reactions 16,18 ,20,22,24O+58Ni and 28Si+58,62 ,64Ni. Microscopic Skyrme-Hartree-Fock proton and neutron density distributions are used in the calculations. It is found that the energy dependence of the interaction potential enhances the fusion cross section, where it increases with increasing energy due to the decrease in the interaction barrier. The density dependence of the interaction is found to be of great importance, especially for unstable nuclei, since it directly relates the fusion cross section with the nuclear structure. The effect of the neutron skin is found to largely increase the fusion cross section and spin distribution due to the increase in the overlap region. The coupling to the inelastic excited states strongly enhances the fusion cross sections. The effect of the difference between the nuclear and charge deformations is also investigated. © 2013 American Physical Society.
Rashdan M.,Islamic University of Madinah
International Journal of Modern Physics E | Year: 2012
The NL-RA1 effective interaction of the relativistic mean field theory is employed to study the structure of deformed and superheavy nuclei, using an axially deformed harmonic oscillator basis. It is found that a fair agreement with the experimental data is obtained for the binding energies (BE), deformation parameters and charge radii. Comparison with NL-Z2, NLSH and NL3 interactions show that NL-Z2 gives good binding but larger radii, while NL-SH gives good radii but larger binding. The NL-RA1 interaction is also tested for the new deformed superheavy element with Z<98. Excellent agreement with the experimental binding is obtained, where the relative error in BEs of Cf, Fm, No, Rf, Sg and Ea (Z = 110) isotopes are found to be of the order ∼0.1%. The NL3 predicted larger binding and larger relative errors ∼0.20.5%. Furthermore, the experimental Q-values of the alpha-decay of the superheavy elements 270110, 288114 and 292116 are satisfactory reproduced by NL-RA1 interaction, where the agreement is much better than that predicted by the phenomenological mass FRDM model. Furthermore, the alpha-decay chain of element 294118 are also better reproduced by NL-RA1 interaction. © 2012 World Scientific Publishing Company.
Rashdan M.,Islamic University of Madinah
Physical Review C - Nuclear Physics | Year: 2012
The shape, deformation, and orientation dependence as well as in-medium effects are investigated for the reaction cross sections of 16 ,19C+C systems within the optical Glauber theory, which is currently used to deduce information about the structure of exotic nuclei. A density- and energy-dependent effective nucleon-nucleon reaction cross section is used locally to study in-medium effects. The projectile deformation is treated by a deformed Fermi shape with quadrupole and hexadecapole deformations, where the deformation parameters of 16C and 19C are calculated from the Lagrangian density of the relativistic mean-field (RMF) model. A strong prolate deformation is predicted for 16C while a more stronger oblate shape is predicted for 19C. Medium effects are found to be important for extracting reliable information about the nuclear densities and radii. The deformations and orientations strongly affected the reaction cross section. The difference in the reaction cross section calculated at orientation angle π/2 and at zero degree is of the order of 400 mb. The integrated reaction cross section over all orientation angles (angle average), including in-medium effects, predicted the experimental reaction cross section of 19C+12C. For 16C+12C the rms radius of 16C is increased to about 7% than that predicted by the RMF model in order to predict the experimental data. This greater increase in the rms radius of 16C, to about 3 fm, indicates a neutron halo structure for this nucleus. The deduced spherical Fermi distributions which fit the experimental data of 16 ,19C+12C systems are in fact a prediction of the angle average cross sections. © 2012 American Physical Society.
Abu-Zaitoon Y.M.,Islamic University of Madinah
Applied Biochemistry and Biotechnology | Year: 2014
Plant proteome databases were mined for a flavin monooxygenase (YUCCA), tryptophan decarboxylase (TDC), nitrilase (NIT), and aldehyde oxidase (AO) enzymes that could be involved in the tryptophan-dependent pathway of auxin biosynthesis. Phylogenetic trees for enzyme sequences obtained were constructed. The YUCCA and TDC trees showed that these enzymes were conserved across the plant kingdom and therefore could be involved in auxin synthesis. YUCCAs branched into two clades. Most experimentally studied YUCCAs were found in the first clade. The second clade which has representatives from only seed plants contained Arabidopsis sequences linked to embryonic development. Therefore, sequences in this clade were suggested to be evolved with seed development. Examination of TDC activity and expression had previously linked this enzyme to secondary products synthesis. However, the phylogenetic finding of a conserved TDC clade across land plants suggested its essential role in plant growth. Phylogenetic analysis of AOs showed that plants inherited one AO. Recent gene duplication was suggested as AO sequences from each species were similar to each other rather than to AO from other species. Taken together and based on the experimental support of the involvement of AO in abscisic synthesis, AO was excluded as an intermediate in IAA production. Phylogenetic tree for NIT showed that the first clade contained sequences from species across the plant kingdom whereas the second branch contained sequences from only Brassicaceae. Even though NIT4 orthologues were conserved in the second clade, their major role seems to be detoxification of hydrogen cyanide rather than producing IAA. © 2014 Springer Science+Business Media.
Saadi S.M.M.,Islamic University of Madinah
Proceedings - 2013 Taibah University International Conference on Advances in Information Technology for the Holy Quran and Its Sciences, NOORIC 2013 | Year: 2013
Through this research the researcher aims to explain the concept of virtual learning,its advantages and disadvantages, difficulties faced in implementing it, and addressing how to take advantage of applying Virtual Learning Environment in the service of the Holy Quran by addressingthe objectives and virtual learning perspectives applied. In addition, to presenting the virtual learning processes and methods of evaluatingoutputs. This is done using the descriptive and analytical approach. The results of the study show that the virtual learning in the field of the Holy Quran evolves from the educational, social and multiple technical and ethical objectives. In addition, the virtual learning of the Holy Quran depends on many perspectives,such as the right of learning is guaranteed to all taking into account individual differences and gradual learning progress. Thus, the characteristics of virtual learning processes proposed for the Holy Qur'an are: easy to use, and graudaully start with preparation and planning and ends with evaluation and optimization. The assessment of outputs depends on who will implement the evaluation and how it will be applied. © 2015 IEEE.
Rashdan M.,Islamic University of Madinah
Physical Review C - Nuclear Physics | Year: 2015
Sub-barrier fusion cross sections for reactions involving stable and very neutron-rich nuclei, which may be important in determining the composition and heating of the crust of accreting neutron stars, are calculated using internuclear potentials derived from the microscopic Brueckner G-matrix and Skyrme SKM∗ and SLy4 energy density functionals. Microscopic Skyrme-Hartree-Fock proton and neutron density distributions are used. No parameters have been fit to fusion data. Calculations are performed for the isotopic reactions O16+O16,O16+O24,O16+O28,O24+O24,C12+O16,C12+O24, and C12+C12, which are of great astrophysical importance for the understanding of the time scale and the nucleosynthesis during late stellar evolution. The coupling to the low lying excited states is considered through the ccfull code. I compare my results with the time-dependent-Hartree-Fock calculations and with the São Paulo model as well as the experimental data. I found a remarkable agreement with the fusion cross sections for stable nuclei. © 2015 American Physical Society.