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 research targets exploring the designs of the kindergartens’ libraries in Baghdad for the perspective of the teachers as well as possible methods of improvements, considering the importance of this type of furniture for the child and its vital role in getting the child into the habit of reading and browsing, since the kindergarten library is the first of its kind that the child encounters in his life, if the relationship between the child and the library is of a positive type the experience with both printed and non-printed materials will be joyful and this type of relationship continues and strengthen with all other types of libraries over time. To achieve the goals of the research, the researcher prepared a focused survey sheet t
... Show MoreFocused research problem that every work of any kind or size has signs indicating it and reveal the nature of either positive aims to achieve the objectives of the organization or a negative intersects with and contrasts with the context and style is the of work, as much as we care to fulfill the positive initiatives and seek to activate it and it to expect of them development of work and approach of the target by most direct route, we should take care also and just the sane, if not larger by indicators and negative actions because it is the way and means to detect imbalances cases that prevent achieving the desired objectives, or cause waste of money, effort, time, and therefore dispersion energies, efforts and wasted resources wit
... Show MoreDuring the kingdom period between 1925-1958 fifty two member of parliament were elected representingHilla governorate. Only twenty nine of them were from Hilla that cause of choosing a member was according to qualifications of that era to play vole in Iraqi policy. Some of house qualifications related to tribes or privately of family. Other important causes of choosing a member depended on relationship to political parfait or holding scientific degree, in addition some members filled positions in the government such as being previous minster which gave him special distinction to be chosen as amember. Some other were members of the senate, here we should refer to the article no,63 of Iraqi constitution which imposes that any minister
... Show MoreThe research aimed at identifying the effect of using constructive learning model on academic achievement and learning soccer dribbling Skill in 2nd grade secondary school students. The researcher used the experimental method on (30) secondary school students; 10 selected for pilot study, 20 were divided into two groups. The experimental group followed constructive learning model while the controlling group followed the traditional method. The experimental program lasted for eight weeks with two teaching sessions per week for each group. The data was collected and treated using SPSS to conclude the positive effect of using constructive learning model on developing academic achievement and learning soccer dribbling Skill in 2nd grade seconda
... Show MoreBackground:In this study,TiO2 layer was thermally grown as a diffusion barrier on CP Ti substrate prior to electrophoretic deposition of HA coatings, to improve the coating’s compatibility also macro and micro pores in nano Hydroxyapatite dual coatings were created and their effect on the bond strength between the bone and implant was evaluated. Materials and methods: Electrophoretic Deposition technique (EPD) was used to obtain coatings for each one of four types of Hydroxyapatite(HA)on CP Ti screws (micro HA, nano HA, dual nano HA with micro pores, dual nano HA with macro pores) where carbon particles used as fugitive material to be removed by thermal treatment to create porosity.For examination of the changes occurred on the subs
... Show MoreIn this research Epoxy resin was reinforced by nano alumina (AL2O3) particles in grain size(25-30 nm) with two weight ratios (2,4)% then compared with pure Epoxy. Four mechanical tests were performed on these materials include Hardness, flexural, impact & compression strengths before and after immersion in tap water and chemical solutions (CH3COOH) acid, (KOH) base at (0.5N) ,The diffusivity coefficients of all prepared samples were calculate after immersion in water and chemical solutions mentioned above , the results were showed that the Flexural, Impact & Hardness increase after addition the ceramic particles (AL2O3) while the immersion process results showed illustrated different values from sample to other.
Incremental sheet forming (ISF) process offers a high degree of flexibility in the manufacturing of different sheet parts, which makes it an ideal candidate for prototype parts as well as efficient at fabricating various customized products at low production costs compared to traditionally used processes. However, parts produced in this process exhibit notable geometrical inaccuracy and considerable thickness reduction. In this paper, the single point incremental sheet forming variant of the process has been implemented to manufacture a highly customized cranial implant starting from the computed tomography (CT) scan data of the patient's anatomy. A methodology, from the modeling to the realization of the implant, is presented and discus
... Show MoreA field experiment was conducted in Yusufiya sub-district - Mahmudiya township/Baghdad governorate in silty loam texture soil during the spring season of 2020. The experiment included three treatments with three replicates, as the Randomized Complete Block Design (RCBD) was used according to the arrangement of the split design block. The treatments are in the irrigation system, which included surface drip irrigation (T1) and sprinkler irrigation (T2). Secondly, the Irrigation levels including the irrigation using 0.70 Pan Evaporation Fraction PEF (I1), irrigation using 1.00 PEF (I2), and irrigation using 1.30 PEF (I3). Coupled with, Pota
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