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jcoeduw-1117
Space-Charge Effect on the Theoretical Design of Enzil Lens
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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.

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Publication Date
Tue May 01 2018
Journal Name
Journal Of Physics: Conference Series
Study of vegetation cover distribution using DVI, PVI, WDVI indices with 2D-space plot
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Publication Date
Sat Feb 09 2019
Journal Name
Journal Of The College Of Education For Women
ﺗﺳرب طﻼب اﻟﻣدرﺳﺔ اﻻﺑﺗداﺋﯾﺔ ﻓﻲ ﺑﻐداد اﻻﺷﻛﺎﻟﯾﺎت واﻟﻔرص
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Waste is the most common phenomenon in the educational systems. Such a waste should reduce its efficiency and weaken its productivity which is best represented by failing and dropouts .thus resources meant to develop the educational institutions quality and quantity–wise would be wasted .in other words the return of the investments allotted to develop the educational system would fall short of the aims . The consequences would worst in the primary learning field. The research has three chapters: The first chapter is about significance of the research and its aims in addition to a review of literature. The second chapter is about the concept of dropping out of schools in the primary learning sector plus a history of the phenomenon .Thir

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Publication Date
Sun Feb 10 2019
Journal Name
Journal Of The College Of Education For Women
آﯾﺎت إﻗﺼﺎء اﻵﺧﺮ ﻓﻲ اﻟﻘﺮآن اﻟﻜﺮﯾﻢ )دراﺳﺔ ﻣﻮﺿﻮﻋﯿﺔ(
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Trading global discourse topic as one of the other entrances to world peace, and the most important reasons for co-existence of intellectual and lumpy, and there Important issue related to a fundamental issue of the other cases are denied and the exclusion of others, Trading global discourse topic as one of the other entrances to world peace, and the most important reasons for co-existence of intellectual and lumpy, and there Important issue related to a fundamental issue of the other cases are denied and the exclusion of others, The stories of the prophets and their people the position of calling them and thought the new Massadik it. have found through research that there are two types of methods in the exclusion are as follows: 

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Publication Date
Sun Feb 10 2019
Journal Name
Journal Of The College Of Education For Women
اﻟﺤﻮار اﻟﺤﺴﻲ واﻟﻌﻘﻠﻲ ﻓﻲ ﻓﻠﺴﻔﺔ اﻻﺧﻼق-ﻧﻘﺪ وﺗﺤﻠﯿﻞ
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This research in the philosophy of ethics, we have written under the title (Sensory And Mental Dialogue In The Philosophy Of Ethics -Criticism And Analysis-). Consists of three sections; first: talked dealt within the second part; we writhe about controversial consepts of sensory and mental. Then we about the concept of common philosophical doctrines, either in the third section we talked about the concept of the mind doctrines that secured sence mainly studies in philosophy. The purpose for which our finding in this research is to show that undeniable sense or exceeded in any doctrine of mentale doctrines, just as the mind can not be bypassed or undeniable doctrines sensory ... So as to complete the theory that we have in our thesis to

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Publication Date
Sun Feb 10 2019
Journal Name
Journal Of The College Of Education For Women
وﺣدة اﻷﻣﺔ اﻹﺳﻼﻣﯾﺔ ﻓﻲ اﻟﻘرآن اﻟﻛرﯾم )دراﺳﺔ ﻣوﺿوﻋﯾﺔ(
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The theme of unity of the topics that figured prominently Quran, cited preachers and scholars verses function on the unity and sense, to lift the nation from Hdtha, saved from the crisis, in an attempt to reunite and heal the rift, and re nation to unity and strength, and conduct on the path religion True, The Quran the unit is the Constitution of the Islamic nation and a safety valve, a strong rope of God. The following us in our research and Rod talk about it lonely in the Quran, and the statement of some form, and means its findings, including: (obey Allah and His Messenger, and referring to the Quran and Sunnah, and talk by saying better, reform between the brothers, call wisdom and good advice, etc.. ..), as Pena main obstacles and

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Publication Date
Thu Jan 04 2018
Journal Name
International Journal Of Science And Research (ijsr)
Effect of Doping on Properties of the Hall Effect and Electrical Conductivity for AgInTe2 Thin Films
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The effect of different doping ratio (0.3, 0.5, and 0.7) with thickness in the range 300nmand annealed at different temp.(Ta=RT, 473, 573, 673) K on the electrical conductivity and hall effect measurements of AgInTe2thin film have and been investigated AgAlxIn(1-x) Te2 (AAIT) at RT, using thermal evaporation technique all the films were prepared on glass substrates from the alloy of the compound. Electrical conductivity (σ), the activation energies (Ea1, Ea2), Hall mobility and the carrier concentration are investigated as a function of doping. All films consist of two types of transport mechanisms for free carriers. The activation energy (Ea) decreased whereas electrical conductivity increases with increased doping. Results of Hall Effect

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Publication Date
Sat Apr 01 2023
Journal Name
Journal Of Engineering
Influence of Design Efficiency of Water Supply Network Inside Building on its Optimum Usage: Review
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The water supply network inside the building is of high importance due to direct contact with the user that must be optimally designed to meet the water needs of users.  This work aims to review previous research and scientific theories that deal with the design of water networks inside buildings, from calculating the amount of consumption and the optimal distribution of the network, as well as ways to rationalize the use of water by the consumer.  The process of pumping domestic water starts from water treatment plants to be fed to the public distribution networks, then reaching a distribution network inside the building till it is  provided to the user.  The design of the water supply network inside the building is

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Publication Date
Mon Jan 01 2024
Journal Name
International Journal Of Research In Science And Technology
Encryption of Medical Image Based on Cascaded Design of AES Block Algorithm and Chaotic Map
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Security concerns in the transfer of medical images have drawn a lot of attention to the topic of medical picture encryption as of late. Furthermore, recent events have brought attention to the fact that medical photographs are constantly being produced and circulated online, necessitating safeguards against their inappropriate use. To improve the design of the AES algorithm standard for medical picture encryption, this research presents several new criteria. It was created so that needs for higher levels of safety and higher levels of performance could be met. First, the pixels in the image are diffused to randomly mix them up and disperse them all over the screen. Rather than using rounds, the suggested technique utilizes a cascad

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Crossref
Publication Date
Fri Jan 01 2016
Journal Name
Journal Of Engineering
Theoretical and Experimental Stress Analysis of Cam With Simple Harmonic Motion
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Cams are considered as one of the most important mechanical components that depends the contact action to do its job and suffer a lot of with drawbacks to be predicted and overcame in the design process. this work aims to investigate the induced cam contact and the maximum shear stress energy or (von misses) stresses during the course of action analytically using Hertz contact stress equation and the principal stress formulations to find the maximum stress value and its position beneath the contacting surfaces. The experimental investigation adopted two dimensions photoelastic technique to analyze cam stresses under a plane polarized light. The problem has been numerically simulated using Ansys software version 15 as FE

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Publication Date
Wed May 17 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Theoretical Study of Fatigue Crack Growth to 2SiC3Ti Generalized Paris Equation)
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    A theoretical study was done in this work for Fatigue. Fatigue Crack Growth (FCG) and stress factor intensity range for Ti2 SiC 3 .  It also includes Generalized Paris Equation and the Fulfillment of his equation which promise that there is a relation between parameters C and n.          Simple Paris Equation was used through which we concluded the practical values of C and n and compared them with the theoretical values which have been concluded by Generalized Paris Equation.           The value of da/dN and ∆K for every material and sample were concluded and compared with the data which was used in the computer p

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