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.
A theoretical study by using computer model is presented to study the energy characteristics of the vibrational – rotational levels as a function of the vibrational and rotational quantum number, respectively. The calculations were based on the basis of a multilevel model taking into account the non-equilibrium population of the rotational levels. The computational investigation has been performed to examine the vibrational-rotational characteristics of some hydrogen halides chemical laser molecules. This program takes into account the various molecules of chemical lasers such as, Hydrogen Fluoride (HF), Deuterium Fluoride (DF), Hydrogen Chloride (HCl), and Deuterium Chloride (DCl). The practical difficulties associated with this
... Show MoreDiscourse markers are expressions used to connect sentences to what comes before or after and indicate a speaker's attitude to what he is saying.As linguistic items, they have important functions in discourses of various styles or registers. And being connective elements, discourse markers relate sentences, clauses and paragraphs to each other. "One of the most prominent function of discourse markers, however, is to signal the kinds of relations a speaker perceives between different parts of the discourse". (Lenk 1997: 2) Through political discourse, different types of discourse markers are used. This paper deals with the importance and functions of discourse markers and tries to shed light on the kinds of discourse markers used in polit
... Show MoreThe sunna has the great effect in building the Islamic civilization, and the formulation of the Islamic thinking. It worked at spreading of soicinces at every district of Islam. The purified sunna represent one of the main monuments of Islam after Quran in clarifying the basics of the human intercommunication, and the divine reality. It comes as an explanation to the myertious accounts in the shariaa and sunna that it has begun to form an intellectual depth of the Mulsims' life. The importance ofsunna is it is the second source of legislation in Islamic after the holt Quran. It comes only to affirm what have been mentioned already in theHoly Quran, or clarifying what is not clear in the Quran.
This research tackles the semantic function of colors in the poetry of Gada Al Samman, in the introduction the research explores the difference in the semantic colors for people and the function of these colors in arising the feelings for the human spirit and its influence on that spirit. The research tackles the poems of this poetess that are full of symbolic colors that convey positive and negative meanings related to the poetess herself. In addition the research shows the functions of colors in her poetry through the compatibility of colors by employing colors in her poetry in terms of compatibility with the vision of community to denote colors. Beside using the function of colors contrast by employing the colors in different meaning
... Show Morewealth which has, as well as the factors which entered the national consciousness of thousands of the continent 2. has not been possible to continue the national resistance in Namibia means spontaneous first and in light of the factors of national awareness of the new has taken sweeping the continent during the interwar period in the thirties and forties of the last century, marked by the return of a lot of educated Africans who have received their education in the countries of Western Europe, where traders who looktoa life of freedomenjoyed bythe people ofWaldo.. As well as awareness of labor represented by the working class and the work of strikes and mass anti-exploitation, which was subjected to factor in the region in wages and lack
... Show MoreThe role of kindergarten in the development of moral values of children" The child moral education in institutions of basic education considered as the priority of values and social goals of methodical education , and consideringto how the child be in the kindergarten of susceptibility to absorb and configuration and modification of experiences, thus the kindergartens are important because of their influence in the formation of his character through reincarnation of the personality of those who manage education and try to imitate their values and attitudes and standards of right and wrong. This is also happen through his exercise of educational activities until he has moral insight which enables him to distinguish between good and evil b
... Show MoreThis study attempts to focus on there lation ship between employment policies andsocietal changesinIraq.Theconstruction ofoperational policyincommunitiesin crisis remains fraught with challenges and risks, especially in countries that have longoutstanding conflict sand crises, it is important in this context to achieve those policy and build the foundations of human security and poverty alleviation, unemployment, to find effective ways to help the community to achieve stability and reduce the risk of renew edorrepeat the cycleofviolence-butthatwouldrequirearadicalrethinking, including rethinking the way evaluating therisksandchallengesand management.And thatsuchaprojectshouldbe based ona clear roadmap, andthevisionsofdevelopmentanda clea
... Show MoreThe Maghreb Did not know modern problem more complex and dangerous than the problem of Western Sahara, which is the first obstacle in front of building Arab Maghreb, did not enter Post-independence governments in attrition mutual since liberation wars until today, as happened with this problem between Morocco and Algeria supporting the Polisario Front separatist and did not know the end after so, this research focused on the show dimensional geopolitical to this problem and reveal the role of regional and international behind its continuation and the latest developments after the revolutions Arab Spring and its impact on the problem and the end of UN mission new to the Sahara and results.
Designed Mirrors double and triple package adoption concept heap where they were changing the thickness of the layers within periodic basis of the pile and different ratios (p: q) in addition to change the refractive index of materials within periodic basis and its impact on sites Dhour tops high reflectivity study included spectral region visible and infrared, depending on NdharahFeatured matrix adjusted fall of light close to the vertical arrangement multilayer dielectric materials and thin films homogeneous and uniform
