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“Examine the Multi-Scattering Effect on the Detected Backscattering Photons By Cometary Molecules”

The effect of multiple scattering on the detected γ-photons at the surface of Hyakutake comet, which emitted from the radioisotope 137Cs were studied and compared the results with the single scattering case. Also the multiple scattering results were gathered with the single scattering case and investigate the effect. The calculations were conducted to analyze the variation of counts rate with source detector separation and the source of energy. Monte Carlo (MC) method was used to simulate the scattering and absorption of photons in semi-infinite material by developing the program in FORTRAN language (77 - 90) for this purpose. The distance between the source and the detector takes values of 1, 2,….5 cm, the results showed that single scattering gives a maximum counts generally at distances between 3 and 4 cm, while the multiple scattering case appears increasing as the source detector distance increased.

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Publication Date
Thu Feb 17 2022
Journal Name
Journal Of Discrete Mathematical Sciences And Cryptography
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Publication Date
Fri Dec 22 2006
Journal Name
Journal Of Planner And Development
Cultural development throughout the ages

Urbanization can not be seen as a modern phenomenon. It has led people to live and live in cities for thousands of years. It should be noted here that the oldest villages and large cities have emerged after the crystallization of civilization, that the emergence of cities was one of the phenomena of civilization. There is no doubt that the cities after the emergence has contributed to the development of civilization effective contribution. There has been a civilizational progress when the man practiced agriculture and used metal tools and invented the wheels and went to write in the New Stone Age. In this period, many changes in the field have taken place in economic, cultural and social life. In the economic and cultural aspect, this tr

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Publication Date
Wed Apr 10 2019
Journal Name
Journal Of Legal Sciences
The Components of Public Expenditures

The State shall comply with the requirements of its members and their general, it cannot be without the state spending Multiple expenses and images formats Affect the interests of society, but it should not ignore the administration

This spending must be surrounded by all legitimate formulas and methods, approved by the legislature, according to the regulations and specific instructions, counting the expenditure is illegal and contrary to laws and regulations the executive branch has assumed responsibility and liability has legal consequences.

In addition, spending must be properly, and corresponds to the economic situation of the country, achieve maximum benefit to all members of society, and not waste public funds in ad

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Publication Date
Thu Dec 20 2007
Journal Name
Journal Of Planner And Development
The Weighted Index Number Method

The process of identifying the region is not an easy process when compared with other operations within the attribute or similarity. It is also not difficult if the process of identifying the region is based on the standard and standard indicators in its calculation. The latter requires the availability of numerical and relative data for the data of each case Any indicator or measure is included in the legal process

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Publication Date
Sat Oct 01 2016
Journal Name
Journal Of Economics And Administrative Sciences
The economic importance of nanotechnology

Abstract

Toady technology Nano since it launched human Alivia third interest and anticipation unusual and that by the decision-makers in the world's governments and its institutions and research departments productivity, especially after the US Congress enact a law (the National Initiative for Tknlojba nanotechnology in the United States of America) and the allocation of large sums of money To support this initiative, the research aims to shed light on the concept of technology nanotechnology, which is technology atheist and the twentieth century, and reflect its economic importance and in order to reach the objectives of the research has been the division of research into several axes has been allocated

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Publication Date
Sun Feb 03 2019
Journal Name
Journal Of The College Of Education For Women
The Bourgeois ascendancy under Fatimids

The bourgeoisie groups derived great advantages from the system upon which the Fatimids built up their Regime out the land-tax and other taxes against a fixed sum . The surpulus revenue was the prophet of the farmers . A striking feature of the Fatimid was freedom of enterprise .All sectors of economic life were free-crafts , industry and trade . The government interfered in the trade in victuals only so far to in order to guarantee the supply of wheat to the big towns
The Egyptian Bourgeoisie enjoyed also the great prosperity which was produced among other reasons by the inflationary system of Fatimid economy .
The maintenance of gold dinar being almost pure and of full weight was only possible because Egypt steadily received cons

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Publication Date
Tue Feb 13 2024
Journal Name
Iraqi Journal Of Science
The Singularity of Bipartite Graph


A graph
is said to be singular if and only if its adjacency matrix is singular. A graph
is said to be bipartite graph if and only if we can write its vertex set as
, and each edge has exactly one end point in
and other end point in
. In this work, we will use graphic permutation to find the determinant of adjacency matrix of bipartite graph. After that, we will determine the conditions that the bipartite graph is singular or non-singular.

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Publication Date
Sun Jun 05 2016
Journal Name
Baghdad Science Journal
The Act Of An Operator

In this paper we will study some of the properties of an operator by looking at the associated S-act of this operator, and conversely. We look at some operators, like one to one operators, onto operators. On the other hand, we look at some act theoretic concepts, like faithful acts, finitely generated acts, singular acts, separated acts, torsion free acts and noetherian acts. We try to determine what properties of T make the associated S-act has any of these properties.

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Publication Date
Mon Feb 25 2019
Journal Name
Iraqi Journal Of Physics
The nuclear level density parameter

The nuclear level density parameter  in non Equi-Spacing Model (NON-ESM), Equi-Spacing Model (ESM) and the Backshifted Energy Dependent Fermi Gas model (BSEDFG) was determined for 106 nuclei; the results are tabulated and compared with the experimental works. It was found that there are no recognizable differences between our results and the experimental -values. The calculated level density parameters have been used in computing the state density as a function of the excitation energies for 58Fe and 246Cm nuclei. The results are in a good agreement with the experimental results from earlier published work.

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Publication Date
Fri Dec 31 2021
Journal Name
Political Sciences Journal
The Palestinian division 2006-2007

Receipt date:12/15/2020   accepted date:12/29/2020  Publication date: 12/31/2021

Creative Commons License  This work is licensed under a Creative Commons Attribution 4.0 International License.

The study aims to review the division between Fateh and Hamas between 2006 -2007 based primarily on the documents and statements that have been announced in various media, through a review of the course of events after the Palestinian elections of 2006, which resulted in the victory of Hamas, indicating the course division, and the position of each of

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