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Search Results: 1 - 10 of 1883 matches for " Samir Abdou Abass "
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Stability of Production Planning Problem with Fuzzy Parameters  [PDF]
Samir Abdou Abass
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.23028
Abstract: The traditional production planning model based upon the famous linear programming formulation has been well known in the literature. The consideration of uncertainty in manufacturing systems supposes a great advance. Models for production planning which do not recognize the uncertainty can be expected to generate inferior planning decisions as compared to models that explicitly account the uncertainty. This paper deals with production planning problem with fuzzy parameters in both of the objective function and constraints. We have a planning problem to maximize revenues net of the production inventory and lost sales cost. The existing results concerning the qualitative and quantitative analysis of basic notions in parametric production planning problem with fuzzy parameters. These notions are the set of feasible parameters, the solvability set and the stability set of the first kind.
The Influence of Fertilizers on Groundwater Quality in Gaza Strip
—Free Settlements on Khan Younis—Case Study
 [PDF]

Yunes Mogheir, Salahaldin Abu Abdou, Samir Matar
Journal of Water Resource and Protection (JWARP) , 2016, DOI: 10.4236/jwarp.2016.83027
Abstract: The Palestinian Ministry of Agriculture started the agricultural investment in some free settlements in Gaza strip since 2008. The proposed areas to be planted and the proposed crops were chosen randomly without any researches to study the expected adverse impacts of these agricultural projects on the environmental components. This research aimed at the groundwater aquifer in the proposed region physically and chemically by taking five water samples from water wells in the place. Represented groundwater samples taken from observation wells in the study area were tested in term of total dissolved solids (TDS), electric conductivity (EC), and (N-P-K) concentrations to be compared with the regulated groundwater standards. As a result of testing two fertilizers, it is found that the announced concentrations of (N-P-K) don’t match the real results. The real results are less than the announced concentrations, especially for the phosphorus concentration which had a real result about half of the announced concentration for both fertilizers. Although the real concentrations of (N-P-K) in the used fertilizers are less the announced concentrations, slightly pollution is found in the groundwater aquifer. The groundwater testing results in five observation wells showed that the groundwater tends to be basic, high salinity ranged between 550 and 3500 μS/cm, and Total Dissolved Solids (TDS) results ranged between 330 and 2300. Nitrate results ranged between 65 and 160 ppm, whereas phosphorus and potassium results showed that all groundwater samples met the standards and didn’t exceed them.
Wastewater Decontamination from Microorganisms by Electrospraying Corona Discharge  [PDF]
Mohamed Elsawah, Mohamed Ali, Safwat Hassaballah, Nasser Morgan, Ahmed Samir, Farouk Elakshar, Abdou Garamoon
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.412203
Abstract:

A novel water treatment technique, based on a combination of electrospraying and pulsed corona discharge, has been used for bio-decontamination of wastewater. The electrospraying process has been found to increase the surface area of the treated wastewater, and hence increases the efficiency of the corona treatment process. The phase diagram of the discharge, which characterizes the discharge regimes, has been identified experimentally. The survival ratio of the microorganisms has been investigated experimentally as a function of the applied voltage and the numbers of treatment runs using air and oxygen as working gases. Microorganism surface has been examined using scanning electron microscope (SEM), which enabled in understanding the decontamination mechanisms of the treated microorganism. A complete decontamination has been achieved after only one run for an applied voltage higher than 16 kV when the discharge system was operated in oxygen gas. Optical emission spectrum of the electrosprayed water confirmed the existence of OH-radicals responsible for decontamination process.

A fuzzy approach to the generation expansion planning problem in a multi-objective environment
Abass Samir A.,Massoud Eman M.A.
Nuclear Technology and Radiation Protection , 2007, DOI: 10.2298/ntrp0701067a
Abstract: In many power system problems, the use of optimization techniques has proved inductive to reducing the costs and losses of the system. A fuzzy multi-objective decision is used for solving power system problems. One of the most important issues in the field of power system engineering is the generation expansion planning problem. In this paper, we use the concepts of membership functions to define a fuzzy decision model for generating an optimal solution for this problem. Solutions obtained by the fuzzy decision theory are always efficient and constitute the best compromise. .
Experimental Study of Electric and Spectroscopic Characteristics of Electric Discharge in LPG  [PDF]
Ahmed Abd Elradi, Nasser N. Morgan, Sobhy Ghalab, Mansour Elsabagh, Safwat Hassaballa, Ahmed Samir, Farouk F. Elakshar, Abdou A. Garamoon
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.515146
Abstract: Electric discharge has been carried out in LPG using DC high voltage (0.4 - 3 KV) at gas pressure in the range of 1 to 25 torr. The electric and spectroscopic characteristics of the discharge were studied at different discharge conditions. Deviations from Paschen’s law were observed as a result of the change of the distance between the two the electrodes. Two discharge modes, namely glow discharge and spark discharge modes, has been observed in the discharge current waveforms. The discharge current waveforms indicate a repetitive pulsed behaviour with frequencies of 5 kHz to 5 MHz depending upon the applied voltage and the gas pressure. The emitted spectra from the discharge are also studied near both the cathode and the anode using different electrode materials. Hα line and C2 Swan band system are observed, which confirms the conversion of LPG to hydrogen and carbon clusters.
Photoluminescence Coupled Raman Spectroscopy of Single-Layer Graphene Sheet  [PDF]
Mohamed G. Al- Khattib, Ahmed Samir, Nasser N. Morgan, Safwat Hassablla, M. A. Ahmed, Abdou A. Garamoon
Graphene (Graphene) , 2016, DOI: 10.4236/graphene.2016.54013
Abstract: We present a high quality single-layer graphene (SLG), triple layer graphene (TLG) and few layer graphene (FLG) sheets have been synthesized on cu substrate (metal catalyst) by direct current plasma enhanced chemical vapor deposition (DC-PECVD) at low growth temperature (from 600°C to 750°C). Mixture gas ratio, plasma electrical current and substrate temperature were investigated to determine the optimum condition of high quality single-layer graphene sheet synthesized. The characterization of graphene sheet was performed by X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM), electron diffraction, Raman spectroscopy and photoluminescence (PL) spectrum. Photoluminescence and Raman result was coupled to investigation and evaluation of single-layer graphene sheet.
Autonomy and interdependence: quandaries in research ethics  [PDF]
Bolatito Lanre-Abass
Health (Health) , 2012, DOI: 10.4236/health.2012.44026
Abstract: The autonomy of research participants is crucial in research ethics without which it will be difficult to carry out research. Central to the concept of autonomy is the debate on whether the cultural norms of individuals (particularly women) should be given priority in settings where these norms require that researchers should go through male heads such as husbands and traditional leaders. This paper examines issues relating to the autonomy of women in research ethics. It highlights the far-reaching implications of autonomy for women participating in research using Islam as a religion and Africa as case studies. The paper takes a look at what obtains in Ghana and Nigeria as African countries with diverse religious sects highlighting at the same time the extent to which women are autonomous in some Islamic parts of India and Pakistan. The paper stresses that in spite of certain factors limiting the autonomy of women in Africa and Islam, there is need for a more robust account of autonomy. It takes a relational approach to autonomy concluding at the same time that the best way to do bioethics is to be culture-sensitive.
Numerical Solution of Klein/Sine-Gordon Equations by Spectral Method Coupled with Chebyshev Wavelets  [PDF]
Javid Iqbal, Rustam Abass
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.717167
Abstract: The basic aim of this paper is to introduce and describe an efficient numerical scheme based on spectral approach coupled with Chebyshev wavelets for the approximate solutions of Klein-Gordon and Sine-Gordon equations. The main characteristic is that, it converts the given problem into a system of algebraic equations that can be solved easily with any of the usual methods. To show the accuracy and the efficiency of the method, several benchmark problems are implemented and the comparisons are given with other methods existing in the recent literature. The results of numerical tests confirm that the proposed method is superior to other existing ones and is highly accurate
Social Engineering Threat and Defense: A Literature Survey  [PDF]
Islam Abdalla Mohamed Abass
Journal of Information Security (JIS) , 2018, DOI: 10.4236/jis.2018.94018
Abstract: This article surveys the literature on social engineering. There are lots of security application and hardware in market; still there are several methods that can be used to breach the information security defenses of an organization or individual. Social engineering attacks are interested in gaining information that may be used to carry out actions such as identity theft, stealing password or gaining information for another type of attack. The threat lies with the combinations of social engineering with another type of attacks like Phishing and Watering hole attack which make it hard to defense against. This research aims to investigate the impact of modern Social Engineering on the organization or individual. It describes the categories of Social Engineering, and how the attacker takes advantage of human behavior. At the same time, I also discuss the direct and indirect attack of social engineering and the defense mechanism against this attack.
Microstructure and Strength of Diffusion Bonded 2014 AA Alloys Using Copper Interlayer  [PDF]
Abass Ali Saleh
Open Journal of Applied Sciences (OJAppS) , 2019, DOI: 10.4236/ojapps.2019.95028
Abstract: The major awkwardness when joining AA2014 lies in the presence of creation of oxide films and brittle intermetallic in the bond region. However, diffusion bonding can be used to join these alloys without much difficulty. This paper reveals the characterization of diffusion connection of aluminum alloy AA 2014 with and without applying copper powder. Joining was achieved in vacuum up to (1 × 10-5 mbar) by means of vacuum system. Aluminum alloy AA2014 samples were done as cylinder form and interlayer thickness was equal 100 μm, under joining conditions of (325°C - 475°C) and 4 MPa and period of (1 hour). The ultimate strength was found equal to 188.36 MPa. Bonding joint was examined using light microscope, (SEM) with (EDS) for determining microstructure and depth of diffusion and microhardness was also used at connection zone. XRD outcomes display that the main intermetallic compound phase formula was Al2C. The maximum depth of diffusion obtained was 19.1 μm.
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