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匹配条件: “Salah Azizi” ,找到相关结果约1455条。
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Comparison of performance evaluation of aluminium sulfate and ferric chloride for removal of Disperse Blue 56 from synthetic wastewater
Reza Shokoohi,Fateme Samiee,Salah Azizi
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: Industries are textile wastewater contains large amounts of color can create a lot of pollution. There are different methods for decolorization of textile industries, for example the methods of coagulation, flocculation, chemical oxidation, biological treatment, electrochemical techniques, including ion exchange and other processes. The purpose of this study was to compare the efficacy of alum and ferric chloride is used to remove dye Disperse Blue 56.Material and Methods: The research was according to the method Jar test. The sample pH was adjusted using NaOH and sulfuric acid 0.1 normal. Coagulants with different concentrations were added to each sample. A minute of high speed and slow speed were mixed for 15 minutes and after deposition, sample pH and absorbance values were measured. The dye concentration in the samples was measured by spectrometry method using a UV-1700 Pharmaspec Shimadzo spectrophotometer at 550 nm wavelengh.Results: Coagulation by alum to remove dye Disperse Blue has a pH optimum of 6 and optimal dose of 130 milligrams per liter, which is the pH and the optimal dose has a removal efficiency of 93 percent, while for Chloroferric the pH optimum of 9 and optimal dose of 120 milligrams per liter with removal efficiency over 98 percent.Conclusion: The results showed that the coagulation process using a lot of blue disperses dyes in textile wastewater removed from the wastewater. The results showed that the coagulant is alum Chloroferric has better removal efficiency.
Energy Consumption and Fault Tolerance in the MAC Protocols for WSN  [PDF]
Ridha Azizi
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.36012
Abstract: Wireless sensor networks are currently experiencing widespread enthusiasm in the field of research, mainly because of the great benefits they promise in terms of flexibility, cost, range and robustness. In addition, such networks find use in a wide variety of applications, for example in collecting remote data, type of climate monitoring, seismic activity, or in other areas such?as home automation and medical. Unfortunately, their disadvantages are up to their promises. Indeed, the sensor nodes are subjected to high energy consumption constraints due to their compact size as well as the deployment environment. Frequent replacement of batteries is excluded in a field that can be difficult to access. Therefore, the main challenge remains as a result of miniaturization and reduces power consumption to maximize network lifetime. The objective of this work is to make a thorough study of the energy consumption in wireless sensor networks. The study points are addressed at the media access protocol or MAC protocol.
Pair Production in Non-Perturbative QCD  [PDF]
Salah Hamieh
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.56052
Abstract:

In this paper, a method to calculate the vacuum to vacuum transition amplitude in the presence of a non-abelian background field is introduced. The number of non-perturbative quark-antiquark produced per unit time, per unit volume and per unit transverse momentum from a given constant chromo-electric field is calculated and its application to quark-gluon plasma is presented.

Epidemiological Pattern of Scabies and Its Social Determinant Factors in West of Iran  [PDF]
Mansour Nazari, Aziz Azizi
Health (Health) , 2014, DOI: 10.4236/health.2014.615231
Abstract: Objectives: Scabies has a different epidemiological distribution among different communities worldwide due to different social factors, management approaches and healthcare policies. The present study came to address outbreaks of scabies according to the social factors in west of Iran. Methods: In a cross-sectional study, using the census sampling method, all consecutive patients with the primary diagnosis of scabies based on clinical manifestations referred to healthcare center throughout the two great provinces of Hamadan and Kermanshah at western Iran between March 2006 and February 2010 were enrolled into the study. The baseline characteristics were collected from recorded files at the healthcare centers or by interviewing with the affected patients. Results: Among 3,625,966 subjects covered by the two studied provinces, 177 cases of scabies (170 cases in Kermanshah and 7 cases in Hamadan) were identified by medical staff at the healthcare centers according to clinical manifestations (85.3%) and laboratory microscopic assessments (14.7%). The highest and the lowest prevalence rates were specified to 2009 (58.2%) and 2008 (1.7%). Regarding gender distribution of disease, 53.1% of men and 46.9% of women suffered from scabies with no significant discrepancy. In respect to age distribution of disease, the highest rates of scabies were revealed in the ages ranged 17 to 30 years (31.6%), followed by younger than 17 years (30.5%). The prevalence of scabies was dependently associated with residency in rural areas, family history of scabies, lower educational level, household density, lower monthly income, low personal hygiene, the existence of livestock or rodents at home, seasonal conditions, and movement to contaminated areas. Conclusion: West region of Iran especially Kermanshah province faced with high prevalence and this high disease burden can be determined by some potential factors such as residency in rural areas, family history of scabies, lower educational level, household density, lower monthly income, low personal hygiene, the existence of livestock or rodents at home, seasonal conditions, and movement to contaminated areas.
Lead Poisoning in the World and Iran
MH Azizi,F Azizi
International Journal of Occupational and Environmental Medicine , 2010,
Abstract: Lead is a relatively ubiquitous heavy metal with particular features such as resistance to corrosion, high malleability and wide variety of industrial applications. In medicine, however, it is considered as a slow-acting toxic substance affecting multiple body systems, specifically functioning as a potent neurotoxin in the central nervous system. Lead poisoning may be acute or chronic and can be due to occupational or environmental exposures. The history of lead poisoning dates back to ancient times. The present paper briefly describes the worldwide historical accounts of lead poisoning with a special focus on Iran.
Structural Properties of Synthetic Na-Hectorite Exchanged with Heavy Metals  [PDF]
Karmous Mohamed Salah
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.25053
Abstract: The main objective of this study is to determine the structural characteristics of synthetic Na-Hectorite (H-Na) exchanged with heavy metals: Ni2+, Pb2+, Zn2+, Cd2+, Co2+ and Mg2+ using quantitative analysis based on the comparison between the theoretical and experimental XRD patterns. The different complexes are not homogenous. The hectorite saturated by the lead and cadmium present a segregation distribution of the layers, where as the others complexes present a random distribution.
Theoretical Study of Kaolinite Structure; Energy Minimization and Crystal Properties  [PDF]
Mohamed Salah Karmous
World Journal of Nano Science and Engineering (WJNSE) , 2011, DOI: 10.4236/wjnse.2011.12009
Abstract: Computational energy minimization techniques have been used to study the structure and crystal properties of kaolinite. The full elastic tensors of the sheet silicates of clay have been derived with first-principles calculations based on density functional theory. All calculations were performed using GULP program.
The Benefits of Integrated Methods in PV Making to Promote Their Efficiency and Achieve Low-Cost Modules  [PDF]
Salah A. Vaisi
Smart Grid and Renewable Energy (SGRE) , 2012, DOI: 10.4236/sgre.2012.31004
Abstract: Active systems, such as solar thermal and photovoltaic offer a great potential in reducing of fuel energy consumption. To improve the sustainability of buildings, one of the challenges is to address the role of renewable energies. Today, the photovoltaic installations play an important role in creating solar renewable energy. They create 2000 MW electrical energy per year and its annual global sales grown to approximately 5.6 GWp. This paper presents a general overview on a serious effort to produce PV panels that could provide cheaper solar power. It also focuses on short background of PV. Furthermore, thin film technology benefits, the method of the most absorbing of solar spectrum and the method of solar concentration and the advantages of these systems are presented. Ultimately, a new high concentration PV power system will be assessed.
Computation of the Smith Form for Multivariate Polynomial Matrices Using Maple  [PDF]
Mohamed Salah Boudellioua
American Journal of Computational Mathematics (AJCM) , 2012, DOI: 10.4236/ajcm.2012.21003
Abstract: In this paper we show how the transformations associated with the reduction to the Smith form of some classes of mul-tivariate polynomial matrices are computed. Using a Maple implementation of a constructive version of the Quillen-Suslin Theorem, we present two algorithms for the reduction to a particular Smith form often associated with the simplification of linear systems of multidimensional equations.
Two Dimensional Representation of the Dirac Equation in Non-Associative Algebra  [PDF]
Salah Hamieh, Hassan Abbas
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.32025
Abstract: In this note a simple extension of the complex algebra to higher dimension is proposed. Using the proposed algebra a two dimensional Dirac equation is formulated and its solution is calculated. It is found that there is a sub-algebra where the associative nature can be recovered.
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