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Comparison of the behavioral disorders among children between the age of 7 – 12 living in public and private care centers in Tehran
Goharshad Pourbaferani,Qonche Raheb,Mostafa Eqlima,Abbasali Yazdani
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: The aim of this study was to compare the behavioral disorders among children between the age of 7-12 who live in public or private care centers in Tehran.Material and Methods: The research method of causal-comparative and population of derelict and children 7-12 years institutionalized Tehran. Sampling was done and the way unit 128 children residing in public and private institutionalized were eligible to enter the study through behavioral assessment Rutter Scale (parents and teachers) were evaluated. A demographic list was also used. To analyze data collected, frequency table and U-Mann Whitney were conducted.Results: Results showed that abnormal behavior, social maladaptation, and the attention deficit disorder were significantly more in public than private centers. In antisocial behavior and hyperactivity-aggression no significant difference were observed. Anxiety and depression in governmental centers children is significantly higher than nongovernment centers. Children with poorly functioning families who were being held in both kind of facilities showed more behavioral disorders than orphan children.Discussion: It appears that private child care centers have been successful in working with orphaned children or those with uncaring parents. Skilled manpower and adequate distribution of resources among children (due to low numbers in each center) are considered to be part of the reason for this success.
Use of an Energy-Like Integral to Study the Motion of an Axi-Symmetric Satellite under Drag and Radiation Pressure  [PDF]
Ahmed Mostafa
International Journal of Astronomy and Astrophysics (IJAA) , 2015, DOI: 10.4236/ijaa.2015.53019
Abstract: The axi-symmetric satellite problem including radiation pressure and drag is treated. The equations of motion of the satellite are derived. An energy-like is given for a general drag force function of the polar angle θ, and then it is used to find a relation for the orbit equation of the satellite with initial conditions satisfying the vanishing of arbitrarily choosing higher derivatives of the velocity.
The Predictive Value of Biopsy of the Pancreas and Its Therapeutic Impact in Autoimmune Diabetes  [PDF]
Wael Nassar, Mostafa A. Mostafa
Journal of Diabetes Mellitus (JDM) , 2014, DOI: 10.4236/jdm.2014.44041
Abstract: Diabetes Mellitus is by definition an end-stage organ failure. Type 1 diabetes mellitus (T1DM) is an autoimmune disease. Auto-inflammatory infiltrate appears to characterize the insulitis associated with T2DM. Recently, in 2013, Eva Corpos and colleagues described a comprehensive composition of peri-islet capsules and their basement membrane (BM). Virtanen I, Otonkoski T and Irving-Rodgers H.F. have reported similar descriptions few years earlier which have not been taken seriously as they deserve. Bluestone JA, Virtanen I and Irving-Rodgers H.F. and other colleagues reported that accumulation of the lymphocytes around the islets without invasion of the BM is the first step in disease induction (non-destructive insulitis phase). Invasion of the BM byleucocytic infiltration (destructive insulitis phase) occurs over a period of several years offering a good window for therapeutic intervention. Clinical symptoms appear only when 70% - 90% of β-cell mass are destroyed. This data emphasize the importance of identification and classification of such pathologic features by performing a biopsy of the pancreas with histoimmunochemistry analysis at the pre-hyperglycemic stage in a high risk genetically predisposed autoimmune suspected patient which may at least in part help to achieve new therapeutic approaches and help in halting the progression to end stage pancreatic disease (ESPD) known as diabetes mellitus. In this review we are going to emphasize the predictive role biopsy of the pancreas can build up a solid gold standard tool in diagnosis, stage and therapeutically follow up autoimmune diabetes mellitus.
Genetic Algorithm Based Performance Analysis of Self Excited Induction Generator  [PDF]
Hassan Ibrahim, Mostafa Metwaly
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.38105
Abstract: This paper investigates the effects of various parameters on the terminal voltage and frequency of self excited induction generator using genetic algorithm. The parameters considered are speed, capacitance, leakage reactance, stator and rotor resistances. Simulated results obtained using genetic algorithm facilitates in exploring the performance of self-excited induction generator. The paper henceforth establishes the application of user friendly genetic algorithm for studying the behaviour of self-excited induction.
Effect of Local and Global Scour on Lateral Response of Single Piles in Different Soil Conditions  [PDF]
Yasser E. Mostafa
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.46039
Abstract: Marine structures, offshore platforms and bridge piers are usually supported on foundation piles. These piles are subjected to lateral loading due to wind, waves and currents. Piles installed in marine or river environments are susceptible to scour depending on wave and current characteristics and soil types. In this paper, the effect of local and global scour on behavior of laterally loaded piles installed in different soil conditions has been investigated. Finite element model (FEM) using the software program PLAXIS and Winkler model using the software program LPILE were used in the analyses. Different parameters were investigated such as soil types, scour depth, scour hole dimension, pile material, submerged condition, magnitude of lateral load and load eccentricity. The results showed that scour has a significant impact on piles installed in sand and a less significant impact on piles installed in clay. Global scour has a significant impact on pile lateral displacement and bending stresses. The effect of scour is more significant if piles are subjected to large lateral loads due to the nonlinear response of pile-soil system. Effect of scour of stiff clayey soils on piles is more pronounced than that of soft clayey soils.
Design Considerations for Pile Groups Supporting Marine Structures with Respect to Scour  [PDF]
Yasser E. Mostafa
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.412106
Abstract: Piles supporting marine structures such as jetties, relieving platforms, quay walls and fixed offshore structures are subjected to lateral loads due to berthing and mooring forces, wind, waves, storm surges and current forces. This paper presents some factors that affect the design of pile groups supporting marine structures founded in cohesionless soils. Some main aspects that should be considered in the pile group design are addressed such as pile batter angle, pile group arrangement, pile spacing, pile slenderness ratio and magnitude of lateral static loading. Numerical analyses were conducted to investigate these design aspects with and without impact of scour. Different scour depths were considered to cover the possible root causes of scour around pile groups such as waves, current and ship propeller jets. The study revealed that scour has greater impact on lateral loading of pile groups compared to its impact on single piles. Pile groups with side-by-side arrangement exposed to scour are more critical than single piles and piles groups with tandem arrangement due to the combined effect of scour and pile-soil-pile interaction. It is also concluded that scour protection is not always required. More attention and considerations should be given to scour protection around piles especially if the piles are closely spaced, arranged side-by-side and if slenderness ratio is less than 12.5.
Some Results on Riemannean Multiple Barycenters  [PDF]
Mostafa Zahri, Naji Khallaf
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27058
Abstract:

A characteristic of a special case of Riemannean barycenters on the unit circle is presented. The non-uniqueness of such barycenters leads to an interesting study of the so-called multiple barycenters. In this work, we deal with a smooth one-dimensional manifold S1 only. Some theoretical and computational analysis is listed.

Sociocultural Context and Vernacular Housing Morphology: A Case Study  [PDF]
Hesam Kamalipour, Mostafa Zaroudi
Current Urban Studies (CUS) , 2014, DOI: 10.4236/cus.2014.23022
Abstract: Various dimensions and forces tend to transform urban housing morphology over time. These impacting elements do not equally contribute to the formation of dwellings. One of the main va-riables in urban housing is the sociocultural attributes that contribute to the morphological for-mation of different types of human habitats. The study focuses on the relations between sociocul-tural dimension and spatial configuration in terms of design process, transformation, and mor-phological attributes. Grounding a conceptual framework in a case study of vernacular housing in the cities of Ramsar and Tonekabon in Northern parts of Iran, the study explores the housing morphology of a vernacular dwelling. Implementing a qualitative approach, the research methods of the study consist of descriptive-analytical method, case study, and logical reasoning. Firstly, a conceptual framework is generated through desk study and non-participatory observation. Se-condly, housing typology, morphological mapping, and face-to-face interview have been conducted within the field study. Finally, the study explores the spatial configuration and morphology of the vernacular urban housing in relation to the conceptual framework. Findings indicate the complexity of relations between multilayered hierarchies of sociocultural factors and urban housing form in terms of physical form and spatial configuration in the case study of vernacular housing.
Improve Effluent Water Quality at Abu-Rawash WWTP Using Aluminum Chloride and Carbon Dioxide  [PDF]
Mohamed K. Mostafa
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.713086
Abstract: This research involved attempting to improve water quality at the Abu-Rawash WWTP by using aluminum chloride (AlCl3) as a coagulant combined with injection of carbon dioxide (CO2). The Abu-Rawash WWTP is the main source of water quality degradation at the Rosetta branch, Egypt. Sewage samples were collected from the effluent of the grit removal chamber. Jar tests were performed to estimate the optimum pH value and the coagulant dosage required to obtain acceptable treatment. Eleven samples were prepared with equal dosages of aluminum chloride (10.0 mg/L) and different pH values. The optimal pH values for the elimination of the biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), and turbidity ranged from 6.10 to 6.20 for the aluminum chloride. Results indicated that the appropriate AlCl3 dosage was 2.0 mg/L, especially at pH between 6.1 and 6.2. The results also showed that the AlCl3 was cost effective, especially after reducing pH value. It is also more cost effective than the other proposed solutions such as changing the effluent path of the Abu-Rawash WWTP to the desert.
Impact of Improving Water Quality at the Tala Drain on the Rosetta Branch Water Quality  [PDF]
Mohamed K. Mostafa
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.610102
Abstract: The Tala drain is the second major source of pollution along the Rosetta branch. The Tala drain receives discharge from dairy industry and agricultural drainage, as well as untreated domestic wastewater. This research involved attempting to improve water quality at the Rosetta branch by improving water quality at the Tala drain. Water quality at the Tala drain will be improved through improving effluent water quality from the dairy industry using aluminum chloride (AlCl3) as a coagulant, with injections of carbon dioxide (CO2), and constructing a new WWTP. Results indicated that the optimum aluminum chloride dosage was 225 mg/L at a pH value of 6.15. The estimated treatment cost of 1.0 m3 of dairy wastewater is $0.0425 per day. The river pollutant (RP) modeling was also used to study the effect of improving water quality at the Tala drain in the Rosetta branch water quality. The RP modeling showed that applying the proposed solutions will significantly improve water quality at the Tala drain and at the Rosetta branch.
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