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 industrial development and raise the level of income that has emerged clearly in the middle of the last century in many rich and medium rich countries has great influence on the risen of the health care level. Which led to a significant increase in the reconstruction of people over 65 years and this in turn has produced markets for products and services through modifications to the existing products to meet their physical needs. The importance of research also has the universal design of a comprehensive actually so that it covers as much as possible from human physical & cultural activities. The importance of research locally is to concentrate on this subject who has not been taken into consideration so far to accommodate the eld
... Show MoreThere are many teacher and parents suffer from reduce the ability of attention to the children, so the attention not settle on nothing not only to minute for time, so the research aim to following:
1-Is the using the positive reinforcement lunch in take attention of kindergarten visual? 2-1-Is the using the positive reinforcement article in take attention of kindergarten visual? 3-1-Is the using the positive reinforcement symbol in take attention of kindergarten visual? 4-1-Is the using the positive reinforcement action in take attention of kindergarten visual? 5-Is the using the positive reinforcement socialization in take attention of kindergarten visual? 6-what the most percentage obtain of the six factors of take attention?
Developed the study idea to harvest torrential rains from the plateau of Western style economic cost little help to get the amount of water may exceed 2 billion m 3 per year (depending on the amount of rainfall in that year) has been exploited for agricultural projects or add water to the lakes and rivers. Adopted at the product issued by the oil company, the center (Daura Filtered) reduces the ability of soil to absorb and filter rain water to as much as possible and raise the proportion of surface runoff in addition to this that the product environment-friendly fades and evaporates within 3 years and recognized him in the states was used Successfully.
The Regression analysis is considered as a basic element of statistics science elements, and it is an important style of applied statistics when studying different social and economical phenomena. As well as it is considered the most statistical method used in different sciences and fields, and it determines in clear picture the relations among the variables in the form of equation replaced from the degree of parametric on the strength and the importance of this relationship .And ;also it repots the degree of prediction and response ;also ,it is necessary in regression planning and making decisions for finding regression equation .And it is one of modern styles which tak observable caring especially in artificial neural networks. Our main
... Show MoreChange the properties of the river hydrological and geomorphological during his career from its source to its mouth depending on the variables may be quick effect and short-term, addressed the study put the Tigris River geomorphological and hydrological and environmental in the city of Baghdad and found that most of the manifestations geomorphological indicate that the river enters the aging in the area were not so previously evidence suggests hydrological and environmental river that entered this stage long ago may be an extraordinary period. He found that the cross sections and locations of erosion and sedimentation size and type of flow patterns may change with moderate values to patterns with relatively abnormal values for the river.
... Show MoreThis research endeavors to clarify the relationship between the general policies of the country and Civil Organizations (Cos). This requires that we first identify the concepts of making polices on the one hand, and of COs on the other hand. Initially, polices starts as personal ideas that are, later, turned by some groups of people into suggestions. When the governments adopt these suggestions, they become state policies as shown by the following: Idea ----------> Suggestion--------> Policy. COs are groups of free voluntary organizations acting to bridge the gap between the state and the public, and to respond to the latter's demands. The organizations includes, among others, trade unions and professional associations. In oth
... Show MoreLiterature historians and researchers almost agree that literature is a product of the environment and it is the product of interaction of events and it affected by the direction of that environment and then the literature affects the its environment and the modern science confirms this fact until make the environment competes hereditary factor in its effect because that each environment has its characteristics which affect the literature and leaves its effect on it and even when a writer exaggerate in its monopolize and tyranny of selfin its literature, he cannot be away from affection by including around of literature because the literature is the mirror that reflects aspects of the environment. In other words, literature is expression
... Show MoreThe aim of this research is to find out the influence of Daniel's model on the skills of the twenty-first century among the students of the scientific-fifth grade at the secondary and preparatory government morning schools for the academic year 2022- 2023. Two groups were chosen out of five groups for the fifth-scientific grade, one of which represents the experimental group that is taught by the Daniel model, and the other is the control group that is taught in the traditional method. The equivalence of the two research groups was verified with a set of variables. As for the research tool, a scale was developed by the researchers for the skills of the twenty-first century, in which they adopted the framework of the Partnership Organizat
... Show MoreVibration is a source of energy that can be beneficial or harmful based on the application. Vibration can affect the function of any structure; however, Ceramic matrix composite (CMC) is one of these structures. Whereby less studies have been concentrated on study its function specially when electromagnetic wave (microwave) exposed on its surface to perform its designed function. To address this concept, SiC composite has been fabricated which is designed to have a transparent characteristics to microwave. External vibration had been applied on its surface to monitor how much influence could nanoscale amplitude vibration damage the microwave interaction. The source of vibration was applied from piezoelectric and the vibration was monitored
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