Archives-April 2013

From the perspective of social-cognitive theorists, those who stress the efficient, Likelihood their impairment Against Stress and poor social functioning is less. Well as those in different situations Such as social interaction and academic performance have a strong sense of efficacy are less affected by anxiety and stress. This study examined the Effect of training Fordyce Happiness on Increase students' self-efficacy. This study used a quasi-experimental research. The population of all high school students in the first term is Harsin in iran were studying in the academic year 88-87. A sample of 40 of them were selected and divided into control and experimental groups. The experimental group received 12 sessions of two hours training happiness. The tools used in this study include: 1- Cherer efficacy Questionnaire (GSE). 2- Program of Training Fordyce Happiness. T test was used for data analysis. T test on the difference between pre-test and post-test scores Showed that Fordyce Happiness Training was increased the efficacy in significance level of 0/05.

This study compared self-efficacy and hopes in 30 elementary school (sixth grade) children with learning disabilities (LD) and 30 their peers without LD. An ex post facto design was used. Statistical population comprised of all students in elementary schools (sixth grade) in, harsin, Iran, during the 2012-2013 academic year. Students with learning disability were randomly selected. The students with LD had been diagnosed by Colorado Learning Difficulties Questionnaire (CLDQ). The student completed the Wechsler Memory scale, General Self-Efficacy Scale, and Children’s Hope Scale. Data were analyzed using analysis of variance. Differences were found between the groups on the self-efficacy and hope.

In this study, the different film thicknesses of nano silver–clay films were prepared by varying volumes of the composite dispersion for casting. Effect of film thickness on thermal behavior, solid-state crystallinity, water uptake and erosion, and water vapor permeability of the nano composite films were investigated. The film thickness caused a small change in thermal behavior of the films when tested using DSC and TGA. The crystallinity of the thin films increased when compared with the thick films. Water uptake and erosion, water vapor permeation of the thick films were higher than those of the thin films. The results suggest that the evaporation rate of solvent in different volumes of the composite dispersion used in the preparation method could affect crystallinity of the film surface and film bulk of the nano composite films. This led to a change in water vapor permeability of the films.

Mechanical properties of seven types of Ag - clay nano films were investigated. Elasticity of Modulus, Tensile Strength, Toughness, Elongation at break, Tear Strength and color of nano films were compared with those of the regular Low Density Poly Ethylene film. Results showed that inclusion of nano particles increased Modulus of Elasticity, Tensile Strength and Tear Strength but Elongation at break point and toughness of the films were decreased. The effect of film type on Modulus of Elasticity, Tensile Stress and Tear Strength, were significant at the 0.01 level and for Elongation at break point and toughness was significant at the 0.05 level. Investigation of film color parameters and ?E showed that the 1000 ppm nano Ag film has more color than other films. The smallest ?E was related to the control film. ?E value of the nano Ag films increased with increasing nano particle content and in nano composite films, decreased with increasing clay content. In sum, the nano film with 1000 ppm nano Ag content was the best film and control film was the worst film. In conclusion, the nano composite film (SC3) with 500 ppm nano Ag- 450 ppm nano clay content was the best film in terms of the mechanical properties.

This study compared self-regulation in 80 middle school athlete and non- athlete boys students (seventh and eighth grade). An ex post facto design was used. Statistical population comprised of all students in middle schools in, harsin, Iran, during the 2012-2013 academic year. Students selected by randomly multi-cluster sampling. The student completed the Self-Regulation Scale (SRS). Data were analyzed using analysis of variance. Differences were found between the groups on the self-regulation.

Stock control is an act of stocking goods to satisfy expected future demand. This gives rise to the problem of “how much and when to place order for new goods when stock is going down. Decision regarding the quantity ordered and the time at which it is ordered is based on minimizing an appropriate cost function to balance the total cost function resulting from overstocking or under stocking. Quantity discount stimulates the interest of the distributor to stock more goods and hence the need for additional warehouse which may increase his holding cost. This work has considered inventory using two warehouses-owners and rented warehouses. A model similar to that of Tien Yu Lin (2011) is developed. It has been shown that optimal order quality that minimizes the expected total cost is obtained. The consequence of the limit of the holding cost of the rented warehouse on the optimal order size is also given.

Clay–Ag composite films were based on polyethylene, 0.75 degree and master batch which were produced under the temperature 195-165 degrees Celsius, at 50rpm speed. The morphology and microstructure of the composite films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). The tribological behavior was investigated by using a ball-on-disk tribometer in vacuum and in humid air. The crystalline Ag phase dispersed in amorphous Clay and the size of the crystalline Ag increased with the Ag content in the films. The mechanical and tribological properties of Clay–Ag composite films varied with the Ag content. At the content of 42 at %Ag, the composite film had the highest microhardness and elastic modulus. The amorphous Clay in the Clay–Ag 42% composite film made the main function during wear, so the film showed the lowest friction coefficient. The friction coefficients of the Clay–Ag composite films in vacuum were lower and more stable than those in humid air, but the environmental sensitivity of tribological behavior decreased obviously due to the addition of Ag in the films.

The study used environmental, economic and social parameters to investigate the impact of open space conversion on neighbourhood quality in a planned residential estate in Nigeria. The study relied largely on primary survey to elicit information from 142 residents in the area using stratified random sampling approach. Data from existing literature were adopted in appropriate instances to enrich the study. Analysis of the data was carried out with use of several descriptive statistics (Relative Impact Index RII, Simple Frequencies, Percentages, Charts, etc) on Statistical Package for Social Sciences SPSS 17.0 version and Inferential Statistics (Multiple Regression Analysis). In addition, Contingent Appraisal Technique (WTP) was also employed in the analysis. The study showed that while increased neighbourhood noise level RII=0.758 is of the highest environmental effect, followed by increased air pollution RII=0.740, and increased neighbourhood insecurity RII=0. 706, however the residents’ WTP analysis revealed that the residents are willing to pay more for improved security WTP (RII=0.630) and sanitation WTP (RII=0.576) than any other aspects of environmental impact of open space conversion.

The thermal power plants are designed based on required conditions (like quality of steam, pressure and temperature of steam e.t.c.), but actually inlet conditions are not as per the design conditions. In practical situations, when power plants are installed there are lots of constraints. This tends to reduce or increase output power and heat rate of thermal power plants. These constraints are leakages, installation errors etc. So due to these conditions, the designed power and heat rate are never achieved. Due to these variations in the power output from plants, it is always a matter of disputes. So the correction curves for power and heat rate are generated for pressure drop in extraction line 5, as a parameter at different conditions. These curves indicate that if operating conditions are vary, then power output and heat rate also vary. This paper deals with the generation of the correction curves for 120 MW thermal power plant by using computer aided software for pressure drop in extraction line 5.

The gas solid hydrodynamic studies of a Flat plate, Conical and partitioned concave distributor is reported. The study included hydrodynamic characteristics and moving pattern of particles in the bed. One of the objective of the present work is to investigate the influence of distributor types on the performance of fluidized bed reactors using group B particles as per Geldart D,.1972. Classification Gas - solid hydrodynamic characteristics viz ; Bubble diameter Froude no , Bubble rise velocity of partitioned concave distributor are compared with the conical and flat plate distributors commonly used. The bed void age is used as the parameter for indicating the fluidization quality in selecting the final configuration of the distributor. The bed void age arrived for partitioned concave distributor are compared with the conical and flat plate distributors and results presented.