Journal of University of Babylon

1

Designing a Method for Synchronizing The Producer-Consumer in Java

M. Al-Shuraifi

Pages: 1267-1275 English

Abstract

The producer-consumer term refers to a programming concept in which the producer computes some value and then place it in a shared object. The consumer reads the produced value and does something with it. How do we make sure that the consumer doesn't consume the value until it has been produced? Or, what happens if the producer and consumer work simultaneously? As synchronizing them could be done inside operating systems, still difficult using programming languages. This paper puts the mechanism for synchronizing both the producer and consumer in a programming language taking in account that the pc used has only one cpu. Java has been used to get rid of that difficulty and synchronize them as it is considered as the first concurrent object oriented language COOP.

2

Hiding Text In Text By Using Multi Cryptography Algorithms

Bahija Khudaier Shukur

Pages: 1276-1285 English

Full Text Issues

Abstract

There are two principal ways to keep a message out of the enemy's hand's:
The first one you can conceal the message and hope that the enemy can't find it: this is known as steganography, the second you can scramble the message, and hop that (assuming that intercepted) the enemy is unable to unscramble [Bender et.a1. 1996; Kanh, 1996;Lin, 2003]. In this study we are mainly concerned with a cryptography, and a method of steganography that have been used or proposed, where we have been used plain text file in different length, and hidden it inside another text file which have been called cover file (storg file) also in different length, and then ciphering the text result which contains inside it the plain text by using three different methods. The dictionary method have been used to hide the plain text inside the cover file, this method depends on the choice of the repeated words in the cover file and replace them with synonomous, then take the code to each synonomous, finally, if there is matching between plain text bits and synonomous. To increase the security to the resulting file. Enciphering in three methods: the first one includes replacing the characters of result file with another character depending on the place of them. The second method depends on the character place in alphabet and it place in the resulting file, by using special to them. The third method takes the file result from second method and do some specific separation processes to generate new cipher text, but the decipher stage and the plain text retrieve include sequence of processes in the inverse direction to the above processes to obtain the plain text which is hidden in it, and decipher the cover text to ensure the truth of above processes.

3

Using Genetic Algorithm to Generate Optimal Codebook for Image Compression

Suhad A. ALI

Pages: 1286-1293 English

A study of 189 patients suffering from gastroduodenal ulcer disease were done in Hilla Teaching Hospital in Babylon governorate during the period from June to November, 2007. The patients ranged from (15-75) years old.
Two gastric biopsies were taken from each patient, the first biopsy was used to perform the histological and parasitical examination and the second was used to perform both the direct smear test in addition to the bacterial isolation by using selective chocolate medium. In addition, stool specimen from each studied patient was taken in a clean container for confirmatory parasitic infections.
Forty-one gastroduodenal patients(21.6%) who infected with Helicobacter pylori, they also have other parasitic infections. From these 41(21.6%) gastroduodenal infected patients, there were 21(51.2%) H.pylori, 10(24.3%) Giardia lamblia, 7(17%) Entamoeba histolytica, and 3(7.3%) worms respectively. The first age group (15-30) years old showed high percentage of infection (29%). Twenty eight patients were males (68%) while thirteen patients were females (32%). Highest percentage of infection was presented among smoker gastroduodenal ulcered patients (70.7%).

Keywords

Adult Enteric parasites gastroduodenal ulcer H.pyloria Hilla Teaching Hospital

21

Evaluating the Nutritive Value of the Pollen Substitutes Used Commercially for Feeding Honey Bee, Apis mellifera L., Colonies in Tripoli, Libya

Murtadha K. Glaiim, Fateh M. Al-Dayikh

Pages: 1441-1449

Full Text Issues

Abstract

The present field study was carried out from August 12 to Nove006Dzber 4 , 2001 to evaluate the nutritive value of the pollen substitutes used commercially for feeding honey bee , Apis mellifera L. colonies in Tripoli area , Libya . These substiutes included Nectapoll (R) paste produced by Hamman Company in Germany and the Libyan Paste produced by Tripoli Society of Beekeepers. The chemical analysis showed that the protein concentrations were about 2% and 1% in Nectapoll(R) paste and Libyan paste, respectively. The rates of consumption varied from 60.1-90.0 and 83.7–152.7g / week / colony of the two pastes, respectively. Although the consumption rate of Libyan paste was significantly higher than that of Nectapoll(R) paste (P<0.05), both of the pastes had no beneficial effects regarding brood rearing, adult population, and colony weight when compared with unfed (control) treatment. We believe that the failure of these foodstuffs might have been caused by more than one factor, especially low concentration of protein, lack of certain nutrients and low rate of consumption ( unpalatability )

22

Effect of Spraying with N, K , Ca and Daminozide on fruit Fig contents from some nutrients and crackings

Abass Mhson Salman Al- Hmadawi

Pages: 1450-1458 English

Nedhal M. Al-Shereefi

Pages: 1381-1387 English

Full Text Issues

36

Removal of Blue Dye From Wastewater by Adsorption onto Activated Carbon

Full Text Issues

Abstract

In the present research, flow through rotor-stator of first stage of axial flow turbine in Al-Hilla Gas Turbine Power Plant is analyzed. This 2D analysis provides insight into the accuracy of the discretization scheme and FLUENT's ability to predict the complicated flow features typical of turbo machinery applications. The analysis method is based on unsteady, two dimensional, compressible, inviscid flow with steady-state solutions computed as the asymptotic limit in time of transient solution. Two turbine blade cases are presented. The first involves subsonic flow throughout the rotor blade turbine; the second involves subsonic inlet and discharge flows with transonic flow over a portion of the blade passage. Generally good results is shown.

41

Exact Stiffness Matrix for A Non-Prismatic Plane Frame Element with Parabolic Varying Depth

Balqees Abdul Wahid Ahmed

Pages: 1646-1658 English

Full Text Issues

Abstract

In this paper, the derivation of an exact stiffness matrix for a non-prismatic plane frame element with parabolic varying depth is presented .The derivation considered the coupling between the axial force, shear force and bending moment .A numerical example is carried out on a beam element using the derived stiffness matrix showing the difference between the exact solution and that obtained by finite element method by dividing the element into a number of prismatic elements is presented. The obtained results show the validity and efficiency of the derived stiffness matrix. It is found that the deflection obtained by using the finite element method is greater than the exact solution by ( ).

Keywords

stiffness matrix; non-prismatic element; parabolic varying depth; plane frame element

42

The Effects of Surface Treatment on the Mechanical Properties of Carbon Fiber Reinforced Plastic

Jaleel Kareem Ahmed, Ali Hubi Haleem., Alaa Rasheed Omran.

Pages: 1678-1686 English

عودة جبار بريهي, أحمد عبد الحمزه, جاسم عاجل

Pages: 1752-1763 Arabic

Full Text Issues

Abstract

تم في هذا البحث دراسة أمكانية استخدام مادة اليوريا NH2)2CO) كمعجل جديد في نظام الفلكنه لكل من المطاط الطبيعي (NR) ومطاط الستايرين – بيوتادايين الصناعي (SBR) , أنجز البحث في مختبرات الشركة العامة لصناعة الأطارات في النجف الأشرف /معمل اطارات بابل كجزء من جهود منتسبيها لأيجاد بدائل متوفرة محلياً ورخيصة الثمن للمواد الكيمياوية المضافة للمطاط , قيست المواصفات الميكانيكية والانسيابية (مواصفات الفلكنة ) للتراكيب الجديدة وقورنت مع تركيب قياسي لكل من مطاط NR( يتضمن المعجل HMT) ومطاط SBR( يتضمن المعجل (CBS.
بالإضافة لرخصه وتوفره أظهر المعجل الجديد تأثيرات واضحة على خصائص الفلكنه والخواص الميكانيكية للمطاط الطبيعي مع الأحتفاظ بنفس قيمة الصلادة وأنه يجمع بين معدل الإنضاج المقبول والمقاومة الأعلى للأحتراق وباستخدامه أنخفض كل من الوزن النوعي والأرتدادية مما يفتح الباب لاستخدامه في التطبيقات التي تتطلب خفه في الوزن ومستوى عالي من التخميد , وبمقارنته مع معجلات MBS ,CBS ,HMT , MBTS , MBT فقد ظهر امتلاكه لدونه وقابلية تصنيع تفوق ما للمعجلات الثلاثة الاخيره وامتلاكه لمقاومة احتراق تقترب من المعجلات ذات الفعالية المؤجلة(MBS, CBS ) إلا إن كثافة التشابكات التي يحدثها تكون عموماً قليله مما تطلب تحسين هذه الخاصية بتغيير نسبة الكبريت إلى المعجل (Q) إذ لوحظ انه بزيادة نسبة المعجل في نظام الفلكنه تسرع معدل الإنضاج وازدادت كثافة التشابكات والصلادة , كما إن التغيير غير المنتظم لبعض الخواص يتيح الامكانيه للحصول على مواصفات بعينها وذلك بالتحكم بقيمة Q .
لوحظ عند دراسة سلوك المعجل الجديد بتغيير نظام الفلكنه ( بإضافة مادة CTP-100 المبطئة ) إن سلوكه يتطابق مع سلوك المعجلات بوجود المبطئات في أنظمة الفلكنه وان سلوكه يكون ثابتاً بتغير قيم Q, وبمقارنة سلوكه مع معجل CBS بوجود مبطئ مع كلا المعجلين فقد ظهر انه أبطأ واقل إحداثا للتشابك وهذا ينسجم مع سلوكهما بدون وجود ماده مبطئه , غير إن الجديد في الأمر إن المعجل الجديد تجاوز معجل CBS في مقاومته للاحتراق مما يعني إمكانية التحكم بسلوكه بالاختيار المناسب لنظام الفلكنه ,أما مع مطاط SBR الصناعي فظهر انه بطئ جداً وذو قدره محدودة لإحداث التشابك وله تأثيرات طفيفة على الخواص الانسيابية حتى عند تغيير Q بضعة أضعاف .

Articles in This Issue

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Keywords

Abstract

Abstract

Keywords

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Keywords

Abstract

Keywords

Abstract

Keywords

Abstract

Abstract

Keywords

Abstract

Keywords

Abstract

Abstract

Abstract

Abstract

Abstract