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 present theoretical study concerning the relation between anthropology and education has discovered the existence of differences in points of view between teachers related to socialization. Anthropologists see socialization as the process in the child acquires the culture of society tike shills, habits, types of behaviors, norms and social values. Sociologists concentrate on the problems of learning, and the types of social behaviors. Social sciences can be considered as integrated unity concerning the realization of objectives. However they hold various opinions about this subject.
The mobile device be used in all fields in society to be the life is more easy. So that it's used in the instructional operation and that need to study the effective of it in the teaching operation. The aims of research are known the effect of using the Bluetooth techniques in the mobile upon students' achievement and their retention of information. The sample consist of (34) students in the first class in Electrical Techniques Department in Technical Institute of Nassiriayah at (2010 – 2011) which divided to two equivalent groups, experimental and control by using the two equivalent groups design. Seven subjects were choices of Electrical Installation subject in second course. The researcher limited the teaching objectives and built t
... Show MoreThe Aim of this study is to identify the importance of associations and professional associations in the field of libraries and information at the global level and at the Arab level through analytical study carried out by the researcher adopted the security of the international federation of libraries IFLA model at the global level, associations, Egyptian information and libraries in the Arab world and the imposition study a number of recommendations. Most important to increase funding for unions and professional associations, and the need to establish sessions and meet with the owners of the profession in order to exchange experiences and skills development.
Passion as as impulse nas not reached the imporhance it dessryes in acabemic stubies desse its essence literatyre lt reprt ot the pillars of arab of ayab coyrtship lt has close connection to hn man life and destiny thus we think that it nee ds analysis and follow regardless of the various studies that history preserved dealing with an area reguires great tot it one widespresad and literary issues lt rises and theme of love and passion whether in hints or in details
The research aims at identifying The Effect of Woods model in the Acquisition of Grammatical Concepts on students at the Sixth Primary. The total number of students is (49) male and female. students are distributed in two groups . The First group is the experimental group which is taught the( Woods Model) and it is (25) students . The second group is the control group which is taught according to the traditional method of teaching and it is (24) students . The researcher has matched between the two groups by the following variables : the age (in months), their intelligence, their parents, academic level of education . The research has constructed multiple choice test of (20) items . The reliability of The test has been calculated and it
... Show MoreThe researcher used the experimental approach due to its suitability and the nature of the research problem. The research community was represented by the eighth-grade students in the Rozak Elementary Mixed School affiliated with the General Directorate of Education in Erbil / the center, for the academic year (2021-2022), the number is (96) students, and the research sample consisted of (63) male and female students, with (31) in the experimental group, and (32) in the control group, and (11) students were excluded by (5) students from the experimental group, and (6) students from the control group, as the excluded, are students who failed and were absent from the lessons, and accordingly, the research sample became composed of (52) mal
... Show MoreThis research aims to analyze the effect between letter of credit opening and implementation procedures which considered one of the most important Foreign services submitted by bank institutions to their customers on Time contracted time limit commitment contract by some Iraqi commercial banks, descriptive analytical method used in This research The questionnaires designed a tool main research to gather information to get to know the effect , Seventy questionnaire forms were distributed, sixty seven forms were analyzable , The answers were analyzed by the arithmetic mean and standard deviation and test the level of influence between variables simple linear regression. The result showe
... Show MoreDrilling solutions can be considered as an intricate mixture comprising of number of chemical additives which aid specific needs such as controlling the rheological properties and reducing corrosion. Inhibitors are substances that are added in small concentrations to corrosive environment to decrease the corrosion. Their applications can be found in drilling equipments. The effect of adding Zinc Sulphate and Carboxymethyl Cellulose to study their influence on the corrosion of carbon steel in Bentonite mud has been evaluated using Weight Loss Technique. This study focuses on determining rheological properties and corrosion characteristics. Results show CMC and ZnSO4 work as inhibitors when added to the Bentonite with inhibition
... Show MoreThe research aims to demonstrate the impact of the acceptable solvency of the National Insurance Company on the investment activity in it, as the research assumes the existence of a statistically significant relationship between the acceptable solvency variable and the investment variable, and the researcher took the National Insurance Company as a place to conduct the research, as it is the first insurance company Watania was established in the fifties of the last century, and it has a long history in the practice of investment activity, and the company’s financial statements for the period from (2010-2019) were relied on, and the annual reports issued by the company as well as records are tools for gathering information, and
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