Table of content

basrah journal of science

البصرة للعلوم

ISSN: 18140343
Publisher: Basrah University
Faculty: Science
Language: Arabic and English

This journal is Open Access

About

a scientfic and evaluted journal that issued in three parts( 1st (mathematics,computors and physics. 2nd ( chemistry and 3rd biology.Geology within the three parts depend on the nature of the paper
first issued: 1968
Vol. issued/year:2 ( with different no.)
each vol. contains between 10-15 papers.
no. of issued published between 2003-2012 =

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Contact info

editor-in-chief mobile: 009647801107399
editorial secretory mobile: 009647801407528
journal e-mail:basrah.journal@yahoo.com
web site:www.bas-j-sci.net

Table of content: 2012 volume:30 issue:1A english

Article
Computer Network Routing Using Neural Networks

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Abstract

The neural networks present widely conducing to solve the routing problem in the computer networks. In this paper, two methods are proposed to solve this problem. A feedforward neural network is included at each node to make local decision, or in central node to determine the complete path between pair of nodes (source, destination). For central routing decision, monitor is included as part of routing system to provide the necessary information to the neural network router. The proposed methods are applied for typical examples of computer networks. The neural networks are trained. Results of the testing proof on their good performance.

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Article
Gosper's Algorithm and Hypergeometric Solutions

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Abstract

In this paper, we study Gosper's algorithm where we use Petkovšek’s technique to give a derivation for Gosper’s algorithm. We show that the least common multiplier can be used to give two simpler algebraically motivated approaches to find hypergeometric solutions of linear recurrences with the additional restriction that the leading and trailing coefficients are constant. In the second approach we use the universal denominator idea. The main result of these approaches that finding hypergeometric solutions reduces to finding polynomial solutions.

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Article
Isovector M2 transitions in 30Si

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Abstract

Transverse M2 form factors for isovector transitions in 30Si peaked at low q values are very well predicted in the framework of simple particle-hole approach. Thus, the structure of the  2 states at EX=9.96, 10.27, 10.93, 11.18, 11.84, 12.02, 12.4, 12.7, 12.83, 13.14, 13.4, 14.0 and 14.19 MeV, respectively, are assumed to be the linear combination of the (1 )(1 ) 1 7 / 2 5 / 2  f d and (1 )(1 ) 1 5 / 2 5 / 2  f d configurations only. The amplitudes of the assumed two configurations are determined phenomenologically by reproducing the reduced probabilities of magnetic quadrupole transitions at the photon point.

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Article
Data Mining based Prediction of Medical data Using K-means algorithm

Authors: Dr. Bushra M. Hussan
Pages: 46-56
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Abstract

Data mining is one of the knowledge discovery steps in database, in which modelling techniques are applied. In this paper, K-means method is applied for dealing with medical database for clustering. To increase the efficiency of mining process, some pre-processing need to be done to the data. Experimental results showed the good accuracy when applied to the adjust data.


Article
New treatment of the solution of initial boundary value problems by using variational iteration method
معالجة جديدة للمسائل ذات القيم الأبتدائية والحدودية باستخدام طريقة التغاير التكرار

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Abstract

In this paper, a new technique is applied to treatment of initial boundary value problems by using initial and boundary conditions together to obtain a new initial solution at every iteration using variational iteration method (VIM). The structure of new successive initial solutions can give a more accurate solution in a little number of steps.في هذا البحث، طبقنا اسلوب جديد يتمثل بمعالجة المسائل ذات القيم الابتدائية والحدودية وذلك بأضافة الشروط الأبتدائية والحدودية معا ان تكوين متتابعة الحلول ، (VIM) لغرض الحصول على حل ابتدائي جديد عند آل خطوة تكرارية باستخدام طريقة التغايرالتكراري الأبتدائية الجديدة يعطي حلا اآثر دقة في اقل عدد من الخطوات التكرارية

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Article
Input-Output Stability Implies Exact Linearization
أستقرارية المدخلات والمخرجات تؤدي إلى شكل خطي مضبوط

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Abstract

We study the recently introduced notion of input-output stability, which is a robust variant of the minimum phase property for general smooth nonlinear control descriptor systems. This paper develops the theory of input-output stability in the single-input, single-output setting. We knew that if a descriptor system has a uniform M vector relative degree and is detectable through the output and its derivatives up to some order, uniformly over all inputs that produce a given output, then it is input-output stable. In this paper we show that the converse is also true, thus arriving at a useful equivalent characterization of input-output stability. In this paper, exact linearization via state feedback and stabilization for affine descriptor systems are considered. Using a local diffeomorphism and a state feedback, the affine descriptor system is transformed to a linear normal form system. Choosing a appropriate feedback controller, the closed-loop system is asymptotically stabilized.في هذا البحث ندرس المصطلح المقدم حديثاً أستقرارية المدخلات والمخرجات، والتي تمثل خاصية مختلفة وأعم من ولكل الأنظمة الوصفية غير الخطية بصورة عامة. هذا البحث يهتم بتطوير نظرية أستقرارية “minimum- phase” خاصية ال uniform M " المدخلات والمخرجات في حالة النظام مفرد المدخلات والمخرجات. نحن نعلم أذا آان النظام الوصفي يمتلك بالنسبة الى مشتقات المخرجات لرتبة معينة، فانه تكون مدخلاته "detectable" ويمتلك خاصية "vector relative degree ومخرجاته مستقرة. في هذا البحث سوف نوضح العكس صحيح، الذي يمثل بمبرهنة التكافؤ لأستقرارية المدخلات والمخرجات. بالنسبة للأنظمة في حالة آون متغير السيطرة خطي وجدنا الشكل الخطي المضبوط عن طريق متغير السيطرة الارتدادي والمستقر. باستخدام تحويل محلي ومتغير السيطرة الارتدادي نقلنا النظام إلى شكله المعياري من ثم أيجاد متغير السيطرة الذي ." asymptotically" يجعل النظام المغلق مستقر من نوع

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Article
Monoidal ( k, q+m; f ) – arcs of type ( m, q+m ) in PG( 2, q )

Authors: Dr. F.K. Hameed
Pages: 90-96
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Abstract

In this paper we discuss a Monoidal ( k, q+m; f )-arcs of type ( m, q+m ) in the projective plane of order q and we proved that the points of weight 0 form a ( q 2 − (m −1)q , q ) – arc in which q - secants = q – ( m – 1 ), q - ( m - 1 ) - secants = q2 , 0 - secants = m and i − secants = 0 , i ≠ q , q – ( m – 1 ), 0. Also we proved that the points of weight 1 form a ( mq, q ) – arc with q - secants = m, m - secants = q2 , 0 - secants = q – ( m – 1 ) and i − secants = 0 , i ≠ q , m, 0 , and we gave some examples when q=3,5,7 .

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Article
Expected Mean Squares For 3-way Crossed Model With Unbalanced Correlated Data
حساب توقع معدلات المربعات لنموذج ذو ثلاث اتجاهات متقاطع غير متوازن لبيانات مترابطة

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Abstract

In this study we calculate the expected mean squares for 3-way crossed unbalanced model with correlated data and notice the effect of the correlated data on F statistic.في هذا البحث تم حساب توقع معدلات المربعات لنموذج ذو ثلاث اتجاهات متقاطع غير متوازن لبيانات مترابطة ولاحظنا التأثير . F للترابط بين البيانات على الإحصائية


Article
Measurement of Radon Concentration in South of Iraqi's Oil Fields by Using Solid State Nuclear Track Detectors (SSNTDs)
قياس ترآيز غاز الرادون في حقول النفط الخام جنوب العراق باستخدام الكواشف (SSNTDs) الصلبة للاثار النوو

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Abstract

Level of radon concentration has been performed in south of Iraq's oil fields, at 72 well. A passive integrating radon discriminative monitor was used in this study. Both LR-115 type II and CR- 39 plastic track detectors have been used for the measurement of radon concentration in the Crude oil samples. The investigation show great variability of radon concentration in each well. The highest value of radon concentration was observed in oil well number (119) in Al-Hammar field 993.4 Bq.m-3 , while the lowest value observed in oil well number (76) in Al-Rafidhya field 195.9 Bq.m-3 .This variation in concentration of radon in the well have been discussed in this study.


Article
Preparation and Study The Optical Properties of
تحضير ودراسة الخواص الضوئية للأغشية شبه الموصلة

Authors: L. A. LATIF لمياء علي لطيف
Pages: 123-129
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Abstract

Thin films of ternary Cd

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Article
Resonance Electron Capture Calculation in Atom-Surface Scattering :H - Formation at Au(100) and Ag(110) Thin Films
H- دراست في التناص الالكتروى وتنبأ في استطارة ررة غشاء رليك : تكويي Ag( و ( 110 Au( عنذ أغشيت رليمت هي ( 10

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Abstract

In this work, electron capture by H- projectiles in grazing scattering from Au (100) and Ag (110) thin films is studied theoretically using Perturbative method. The resonance charge transfer (RCT) on thin film appears to be quite different from that on a semi - infinite free- electron approximation metal, due to the quantization of electron movement perpendicular to the surface plane. Some of the features of RCT on thin films have already been discussed based on CAM studied , so we treat the same systems using CAM method for comparison.

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Table of content: volume:30 issue:1A english