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Search Results: 1 - 10 of 1171 matches for " Khaled Elagamy "
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Hall Effect on Peristaltic Flow of Third Order Fluid in a Porous Medium with Heat and Mass Transfer  [PDF]
Nabil T. M. Eldabe, Ahmed Y. Ghaly, Sallam N. Sallam, Khaled Elagamy, Yasmeen M. Younis
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.39141
Abstract: We investigated the influence of hall, heat and mass transfer on the peristaltic flow of MHD third order fluid under long-wavelength and low Reynolds number approximation. The governing equations are solved analytically with the appropriate boundary conditions by using perturbation technique. The formula of velocity with temperature and concentration is obtained analytically as a function of the physical parameters of the problem.
Peristaltic Pumping of a Conducting Sisko Fluid through Porous Medium with Heat and Mass Transfer  [PDF]
Nabit Tawfiq Mohamed El-Dabe, Ahmed Younis Ghaly, Sallam Nagy Sallam, Khaled Elagamy, Yasmeen Mohamed Younis
American Journal of Computational Mathematics (AJCM) , 2015, DOI: 10.4236/ajcm.2015.53028
Abstract: The mathematical model is presented for the flow of peristaltic pumping of a conducting non-Newtonian fluid obeying Sisko model through a porous medium under the effect of magnetic field with heat and mass transfer. The solutions of the system of equations which represent this motion are obtained analytically using perturbation technique after considering the approximation of long wave length. The formula of the velocity with temperature and concentration of the fluid is obtained as a function of the physical parameters of the problem. The effects of these parameters on these solutions are discussed numerically and illustrated graphically through some graphs.
A Perspective-Based Reading of Culture in English Language Teaching: From the Conventional Perspective to the Intercultural Language Teaching Perspective  [PDF]
Khaled Jebahi
Open Journal of Modern Linguistics (OJML) , 2013, DOI: 10.4236/ojml.2013.33029
Abstract:

This paper reviews culture as perceived in a number of language teaching perspectives. The term “culture” and its relation with language has been a center of interest in different fields of studies. Because the term “culture” is borrowed between disciplines, it is understood differently and altered in the process by the goals and traditions of the borrowers. As such culture remains an elusive concept for the language teacher. Here, I attempt to understand how culture has been understood in different English language teaching perspectives in the last fifty years. This reading helps understand how change in the teaching approach affects how culture is dealt with in class and in teaching materials.

Molecular Modeling, Docking and ADMET of Dimethylthiohydantoin Derivatives for Prostate Cancer Treatment  [PDF]
Khaled Lotfy
Journal of Biophysical Chemistry (JBPC) , 2015, DOI: 10.4236/jbpc.2015.64010
Abstract: In silico technique was applied to screen potential of 16 compounds of 5,5-dimethylthiohydantoin derivatives as androgen antagonist. The 3D structure of the protein was obtained from PDB database. Docking analysis of the compounds was performed using hex docking. Molecular modeling analysis exhibits relatively low LUMO-HOMO energy gap of the studied molecules, indicating that it would be kinetically stable. None of the compounds violated Lipinski’s parameters, making them potentially promising agents for biological activities. The title compounds exhibited the lowest docking energy of protein-ligand complex. Finally, the results indicate that these compounds are potentially as an androgen antagonist, and expected to be effective in prostate cancer treatment.
The Impact of CBSE’s Activities on E-Commerce Applications  [PDF]
Lena Khaled
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.51A005
Abstract:

Component based technology is widely used for both academicians and business. There are numbers of benefits for using this type of technology. First, it helps to increase the efficiency and maintainability of software. Second, it improves quality and helps to enhance productivity. Third, the reuse approach that supports component based technology decreases the time to market. Component based e-commerce can be used to solve e-commerce difficulties at application level as well as at system level. This paper introduces how component based activities have effect mainly on building the framework of the e-commerce. It also discusses how the architectural design of the application can be synthesized.

Developing Innovative Concepts for Measuring and Assessing Transit System Maturity  [PDF]
Khaled Abbas
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.72013
Abstract: In this research three new innovative concepts are introduced and developed: the first defined as Transit System Maturity Components (TSMC), the second referred to as Transit System Maturity Scale (TSMS) and the third labeled as Transit System Maturity Index (TSMI). The TSMC is meant to conceptualise the main strategic generic components characterising the maturity of transit systems. The TSMS is an S shaped scaling system for measuring maturity of transit system components. The TSMI presents an innovative index meant to assess the overall level of maturity of a city transit system. Such framework is envisaged to be used to determine and compare the overall maturity levels of transit systems in cities of the world as well as to act as a basis to identify strengths & gaps that need to be addressed/completed. Furthermore, it can also act as an ingredient in shaping and developing future road maps for transit system in cities across the world. The research concludes by demonstrating the applicability of TSMC, TSMS, and TSMI in conducting an initial assessment of the Transit System Maturity for the fast growing city of Dubai.
Assessment & Improvement of Children Road Safety: A Pyramid & Honeycomb Structure Approach  [PDF]
Khaled Abbas
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.73017
Abstract: In this research, a 4 hierarchical pyramid structure approach is proposed to assess children road safety. The first is referred to as the road safety pyramid representing children road safety components and levels including root, at accident and post accident levels and factors. The second, referred to as the children road safety assessment pyramid, includes 3 cornerstones that are required to represent a detailed methodological children road safety diagnostics. These 3 cornerstones include children safety culture, safety indicators and accident data analysis. The third pyramid, referred to as the children road safety indicators, shows the levels and types of indicators that when computed can be used for in depth analysis and historical comparison of children road safety. The core of the paper is the development of a conceptual model of factors affecting the road behavior of children including traffic exposure and experience, cognitive skills and abilities, perceptual skills, knowledge and attitude. Towards this end, the paper presents the fourth pyramid, referred to as the children road safety behavior pyramid. This includes a 7-level hierarchal structure starting from exposure leading to experience and then skills/abilities, to knowledge to perception to attitudes and eventually culminating into children road safety behavior. The paper concludes by developing a generic integrated children road safety package of policies, measures, initiatives. The package is composed of 18 fields of action. In pursuing such integrated safety package this research also enhanced the classical 3Es concept (Engineering—Education—Enforcement) and introduced instead the 14Es honeycomb structure including (Engineer-ing—Education—Environment—Enforcement—Egalitarianism—Exposure—Ethics—Emergency—Ergonomics—Encouragement—Empowerment—Enabling—Economics—Evaluation). All in all this is meant to act as a generic benchmark guide/checklist for countries in compiling and tailoring children road safety programmes.
Cold Plasma Jet Construction to Use in Medical, Biology and Polymer Applications  [PDF]
Khaled Lotfy
Journal of Modern Physics (JMP) , 2017, DOI: 10.4236/jmp.2017.811113
Abstract: Cold atmospheric pressure plasma jets were capable of generating cold plasma plumes that were not confined by electrodes, which make them very enticing for biological, medical and polymer applications. During this work, experimental study of a low frequency, atmospheric plasma-jet discharge in nitrogen has been presented. The experimental operation of this device was conducted with commercially neon power supply. The discharge process operated by using nitrogen as input gas with different flow rates. The experimental results showed that the maximum plasma jet length of 7 mm was detected at 3 Kv input voltage corresponding to 14 l/min as a nitrogen flow rate. The effect of distance from nozzle, nitrogen flow rate and input voltage on the plasma temperature was examined. The gas temperature decreased continuously as the flow rate of nitrogen increasing from 2 l/min to 14 l/min at 3 Kv as a fixed input voltage.
Effects of Cold Atmospheric Plasma Jet Treatment on the Seed Germination and Enhancement Growth of Watermelon  [PDF]
Khaled Lotfy
Open Journal of Applied Sciences (OJAppS) , 2017, DOI: 10.4236/ojapps.2017.712050
Abstract: The current study was carried out to reveal the possible impacts of non-thermal plasma on water uptake by seeds, seed germination and vigor of seedlings of watermelon seeds using cold plasma jet at atmospheric pressure and room temperature. Cold atmospheric plasma jet with nitrogen gas sources was employed in this study. Five treatment doses and one control were used to conduct germination parameters. The effects of the different duration time of cold atmospheric plasma on the germination of treated watermelon seeds were studied. The cold plasma operated at 3 Kv and 14 l/min as a fixed input voltage and a fixed flow rate respectively. Cold atmospheric plasma increased the germination percentage of watermelon as well as the growth parameters (root and shoot length, dry weight), and the vigor of seedlings. The effects of cold plasma during this study depended on exposure time. The operation time of 4 min considered as an appropriate plasma dose to promote the germination parameters.
Using Kaolinitic Clay for Preparation of a Hydrotalcite-Like Compound  [PDF]
Khaled Hosni, Ezzeddine Srasra
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.26094
Abstract: In this study, Mg-Al-CO3 hydrotalcite was synthesized from a kaolinite as natural source aluminium using two simple methods. The first method uses the kaolinite in natural solid state, the second method use the filtrate of the kaolinite after dissolution by acidic solutions. The structure of the materials was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC) and Brunauer, Emmett, and Teller (BET) measurements.
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