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 Arab Muslime Paid agreat attention to the Islamic East, especially after their conquest to the Parisian lands, they went forword to continue their conquest till Transoxiara (the lands beyond the river). The research is included the Islamic efforts to conquest (Transoxiara) , They needed mouch time for more than 40 years to conquest it. To sattle their steps in it they used its leading figures to prevent the breaking of the agreement held between them as they were known for doing this before more than once. The main idea of this research is releated to study that history in the Arabic resources.
اﻟﺴﯿﺎق ﻓﻲ َأدرك ﻋﻠﻤﺎؤﻧﺎ اﻷواﺋﻞ أﺛﺮَ اﻟﺴﯿﺎق ﻗﺮﯾﻨﺔ ﻣﻦ اﻟﻘﺮاﺋﻦ اﻟﻤﺆﺛﺮة ﻓﻲ ﻣﻌﻨﻰ اﻟﺨﻄﺎب، وﻗﺪ ﻠﻤﺔ ّ وﺗﻤﺜﻞ ﻟﺪﯾﮭﻢ ﻓﻲ ﺟﺎﻧﺒﯿﻦ :اﻷول اﻟﺴﯿﺎق اﻟﻠﻐﻮي اﻟﺬي ﯾﻘﻮم ﻋﻠﻰ أﺳﺎس أن اﻟﻜ ،ﺗﻮﺟﯿﮫ اﻟﻤﻌﻨﻰ وﺗﺤﺪﯾﺪه ِﻜﻮن ﺣُﺴﻨﮭﺎ ورداءﺗﮭﺎ ﻓﻲ ﻧﻈﻤﮭﺎ، ّ ﻻ ﻗﯿﻤﺔ ﻟﮭﺎ ﻓﻲ ﺣﺎل إﻓﺮادھﺎ، وإﻧﻤﺎ ﯾ واﻟﺜﺎﻧﻲ اﻟﺴﯿﺎق اﻟﺤﺎﻟﻲ، وذﻟﻚ ُ ُ ﺑﺮﺑﻄﮭﻢ اﻟﺼﯿﺎﻏﺔ اﻟﻠﻐﻮﯾﺔ ﺑﺎ
... Show More1- That the Jewish minority, was considered one of Iraq`s 1864-1952 main religious minorities ,and has the therights by the Iraqi constitution approved by the Iraqi peopel in addition to the items all ocated py the minorities includiny the Jewish minority .He also bledged formaly before the Nations council to get its independence and to respect the rights of minorities . 2- The Jews who have completed primary education in Jweish and government schools Increased the number so that it seemed that the percentage of illiterate males was zero and the female was not high and as aresult of the increasing number of primary school graduates, so it was need to open addition secondary schools, also increased the number of high school graduates from
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The research aims to reveal the relationship between the use of social networking sites and the image that females make about their physical formation, the nature of the effects, their value judgments about the image of their bodies, their attitudes toward plastic surgery, the most important types of these processes for them, their motivations to conduct them, and the cultural pressures they are exposed to. The study, moreover, investigates in the effects of those plastic surgery on their behavior as active and interacting users with what is published on social media, according to the theory of social comparison. This paper is an attempt to understand the pattern of social networking |
The aim of this work is to study the effect of mud compositions on it’s rheological behavior under high temperature conditions. Seventeen samples of five types of water base mud in which (fresh water bentonite mud. Lignosulphonate mud, gypsum mud, polymer mud, and salt saturated mud) were tested with different temperatures using the fann viscometer model 50-c. All the tested samples, except the fresh water bentonite mud, have the same trend reduction in both plastic viscosity and yield point with increasing temperature. Six rheological models has been adapted: Bingham plastic, power law, Casson model represent the laboratory data accurately
Each book has a specific style in which its author walks on it from its beginning to its end, and the Holy Qur’an is a book that compiled many methods that were indicative of its miracle, and that it is one unit even though it has been astrologer for twenty-three years.
There is no doubt that knowledge of the Qur’anic methods is one of the pillars of the approach that deals with any of the Qur’an, and the multiplicity of Qur’anic methods is a fact that has many causes. It has been expressed by the Qur’anic discharge and the conjugation of verses to bring them to different methods, and on multiple forms such as nominal, actual, singular Qur’an, presentation, delay, deletion, mention, abbreviation and redundancy. The Qur'ani
The aim of the present investigation was to develop a microsponge delivery system of acyclovir to control its release when applied topically thereby reducing dosing frequency and enhancement patient compliance. The microsponges were produced by the oil in oil emulsion solvent diffusion method. The effect of different formulation and process variables such as internal phase volume, polymer type, drug-polymer ratio, stirring speed and stirring duration on microsponge production yield, loading efficiency, particle size and in-vitro drug release was evaluated. The result showed that the microsponge F2 prepared from Eudrajet RS polymer had optimum physical properties regarding the loading efficiency of 99.71_+ 0.7% and product
... Show MoreIn this study, thermal characteristics of a two-phase closed heat pipe were investigated experimentally and theoretically. A two-phase closed heat pipe (copper container, Fluorocarbon FC-72 (C6F14) working fluid) was fabricated to examine its performance under the effect of input heat flux range of 250–1253 W/m2 , 70% fill charge ratio and various tilt angles. The temperature distribution along the heat pipe, input heat to evaporator section, and output heat from condenser were monitored. A comprehensive mathematical model was developed to investigate the steadystate heat transfer performance of a two-phase closed heat pipe. A steady state analytical model, is presented to determine important parameters on the design of two-phase close
... Show MoreVictorian age is known as a time of perpetual change. It is a time of new industrialization, increased urbanization and new technology. Therefore, one of the strongest undercurrents of this is the position of women. Woman at that time was viewed as “an angel in the house” especially this who belongs to the upper-middle class. She is described in such term because she spends much time in her domestic domain. Therefore, she should be passive, obedient and dependent. Despite the Victorian society contains several classes; women are defined under two labels: the angel and the demon or the whore. The angel woman can be any woman from the lower middle class to the aristocracy, while the whore refers to any working class woman. The differen
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