The presentwork is a theoretical study in the field of charged particle optics. It concentrates on the design of electrostatic enzil lens for focusing charge particles beams, using inverse method in designingthe electrostatic lens. The paraxial ray equation was solved to obtain the trajectory of the particles, the optical properties such as the focal length and spherical and chromatic aberration coefficients were determined. The shape of the electrode of the electrostatic lens were determined by solving poison equation and the results showed low values of spherical and chromatic aberrations, which are considered as good criteria for good design.
The purpose of this research is to investigate the effects of rotation on heat transfer using
inclination magnetohydrodynamics for a couple-stress fluid in a non-uniform canal. When the
Reynolds number is low and the wavelength is long, math formulas are used to describe the stream
function, as well as the gradient of pressure, temperature, pressure rise and axial velocity per
wavelength, which have been calculated analytically. The many parameters in the current model
are assigned a definite set of values. It has been noticed that both the pressure rise and the pressure
gradient decrease with the rise of the rotation and couple stress, while they increase with an
increase in viscosity and Hartmann nu
An increasing trend to use probiotic and study their effects on the pathogens has been conductor where they are defined as live micro-organisms that give a health benefit to the host when ingested in sufficient quantities, including the yeast Saccharomyces boulardii In addition research show that a magnetic field (MF) has a biological effect. This study aims to investigate the effects of magnetic field on the inhibitory action of Saccharomyces boulardii against bacteria isolated from urinary tract infection, Study the sensitivity of bacterial isolates to antibiotics after diagnosis by microscopic, Cultural and biochemical examinations as well as Api20 E examinations were used gram negative bacteria , Most isolates were resistant to an
... Show MoreComsol multiphysics software is established to make a simulation that is comparable with experimental device. by utilizing comsol, the positive column domain of direct-current glow discharge with argon is considered for both of different applied voltage and working gas pressure. The calculations are exhibited by using a precise collision cross sections and Townsend coefficients for the argon. The impacts of voltage and pressure on the Debye length, number of particles in Debye sphere and plasma frequency are calculated and graphically delineated. With this regard to the dependence of plasma parameters on the applied voltage and pressure, some of them are found to be compatible with the experimental
... Show MoreBackground: Heat-cured poly (methyl methacrylate) the principal material for the fabrication of denture base have a relatively poor mechanical properties. The aim of this study was to investigate the effect of glass flakes used as reinforcement on the surface hardness and surface roughness of the heat-processed acrylic resin material. Material and method: Glass flakes (product code: GF002) pretreated with silane coupling agent were added to Triplex® denture base powder using different concentrations. A total of 100 specimens of similar dimensions (65 x 10 x 2.5) mm were prepared, subdivided into 2 main groups of 50 specimens for each of the study tests. Ten specimens for the control group and 40 specimens for each of the experimental gro
... Show MoreThe present study addressed "Performance Appraisal of Human Resource Management and Its Effect on Achieving the Organizational Success", for the topics of performance appraisal of human resource management and the organizational success gained an increasing interest being relatively important and modern topics which had a great effect on the future of organizations.
The study aimed at revealing the pattern of appraising the performance of human resource management for the study sample, and whether it was qualified to lead the ministry towards the organizational success, for this purpose two main hypotheses were formulated: 1) there is a positive significant correlation between both variables: performanc
... Show MorePredictability of School Environment in the tendency to aggressive behavior among high primary school students. This study aimed at exploring the Family and school environment predictability of the tendency to aggressive behavior among high primary school students in Irbid Second Directorate of Education. The study sample consisted of 784 male and female students in the high-primary schools of Irbid Second Directorate of Education, chosen as on random cluster sampling method. Three aspects of school environment had the predictability of the tendency to aggressive behavior. The academic orientation of students explained 9.9% of the total variation in the dependant variable while the relationships between peers explained 1.6% and the teach
... Show MoreThis research aims at identifying the effect of problem solving strategy on the achievement of Kurdish language grammer of femal students at the fourth preperatory school. To achieve the study aims , the researcher has chosen intentionally this sample to apply the experiement . The study sample cosists 0f (58) female students distributed randomly on two groups. The experiemental group is taught according to problem- solving strategy and it is (29) female students, while the control group which is also (29) individuals is taught according to the traditional way of teaching . The two groups have been matched statistically in term of age , the academic achievement for the father and mother , intelligence, and the linguistic ability. The exp
... Show MoreThe aim of this investigation was to prepare pies stuffed with ground veal as different level of Textured Soy Protein (TSP) that wetted, minced and replaced at (0, 15, 20, 25 and 30%). The effect of partial substitution for veal with TSP quality, sensory characteristics such as color and homogenizing of the stuffing, taste, flavor, juiciness and overall acceptability was evaluated by taste panel. The obtained results showed that product prepared with replaced 15 and 20% were acceptable by panel taste without significant differences compared to control. The values of taste panel score dropped as the rate partial replacement increased a level of TSP 25 and 30% as compared to control. It can be concluded the possibility of using manufacture
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