Non thermal argon plasma needle at atmospheric pressure was generated. The experimental set up is based on very simple and low cost electric components that generate electrical field sufficiently high at the electrodes to ionize various gases, which flow at atmospheric pressure. The high d.c power supply is 7.5kV peak to peak, the frequency of the electrical field is 28kHz, and the plasma power less than 15W. The plasma is generated using only one electrode. In the present work the voltage and current discharge waveform are measured. Also the temperature of the working Ar gas at different gas flow and distances from the plasma electrode tip was recorded

المقدمة ومنهجية البحث

تعد المحاسبة وليدة الحاجات الاقتصادية وقد بات من الضروري لها أن تتكيف مع التغيرات الحاصلة في بيئة الإعمال من ارتفاع حدة المنافسة، الثورة التكنولوجية للمعلومات والاتصالات، توسع الأسواق المالية، انتشار الشركات المتعددة الجنسيات، العولمة، التوجه نحو حماية البيئة من التلوث وتحمل المسؤولية الاجتماعية والتغيرات في طبيعة المهن لسوق العمل، إذ نجد أن للمحاسبين دورا هاما نحو

The study aimed to examine the sensitivity to stress and its relation to positive mood among educational supervisors. The researcher used the descriptive approach as more an appropriate method for the current study. The sample is composed of (200) educational supervisor. To collect study data, two scales have been used: one scale to measure the sensitivity to stress and the other to measure the positive mood. The results indicated that a high level of sensitivity to stress with low level of positive mood among educational supervisors, sensitivity to stress showed significant differences among the sample regarding to major. There is no correlation between sensitivity to stress and positive mood, and finally, there are no significant diffe

In this study, a chaotic method is proposed that generates S-boxes similar to AES S-boxes with the help of a private key belonging to

In this study, dynamic encryption techniques are explored as an image cipher method to generate S-boxes similar to AES S-boxes with the help of a private key belonging to the user and enable images to be encrypted or decrypted using S-boxes. This study consists of two stages: the dynamic generation of the S-box method and the encryption-decryption method. S-boxes should have a non-linear structure, and for this reason, K/DSA (Knutt Durstenfeld Shuffle Algorithm), which is one of the pseudo-random techniques, is used to generate S-boxes dynamically. The biggest advantage of this approach is the produ

مشكلة البحث واهميته :-

    تنبع مشكلة البحث الحالي من الآثار الاجتماعية سواء أكان على مستوى الفرد أم المجتمع . أذ العزوف عن الزواج مشكلة اجتماعية بل انها مشكلة حقيقية , فهناك عزوف من الشباب عن الزواج وقد اصبح العدد كبيرا في السنوات الأخيرة  وقد بينت إحصائية متخصصة بأن عدد العازفين عن الزواج يقدر بأكثر من مليون شاب وشابة (2-2ص³) . وهذا يعود لأسباب عديدة فقد يكون العامل الاقتصاد

أولا / التعليم الجامعي وأثره في تطوير المجتمع :

تعتبر الجامعات من أهم المصادر الاساسيه لتطوير المجتمع في جميع جوانبه لما لها دور مهم وفاعل في التنمية الاجتماعية والثقافية والسياسية والاقتصادية ، ومكاناً لالتقاء الأجيال ومناخا ًملائماً لبلورة الهوية القومية من خلال الحفاظ على القيم التاريخية ،ومكاناً للتواصل الثقافي والحضاري على المستوى العالمي ، "ومن هنا تنامت حاجات المجتمع إلى أنشاء مؤ

Compression for color image is now necessary for transmission and storage in the data bases since the color gives a pleasing nature and natural for any object, so three composite techniques based color image compression is implemented to achieve image with high compression, no loss in original image, better performance and good image quality. These techniques are composite stationary wavelet technique (S), composite wavelet technique (W) and composite multi-wavelet technique (M). For the high energy sub-band of the 3 rd level of each composite transform in each composite technique, the compression parameters are calculated. The best composite transform among the 27 types is the three levels of multi-wavelet transform (MMM) in M technique wh

     Compression for color image is now necessary for transmission and storage in the data bases since the color gives a pleasing nature and natural for any object, so three composite techniques based color image compression is implemented to achieve image with high compression, no loss in original image, better performance and good image quality. These techniques are composite stationary wavelet technique (S), composite wavelet technique (W) and composite multi-wavelet technique (M). For the high energy sub-band of the 3rd  level of each composite transform in each composite technique, the compression parameters are calculated. The best composite transform among the 27 types is the three levels of multi-wavelet

The first thing that comes to mind is the highly important question of whether there were some effects of human behavior and its fluctuations on the theories of the efficient market and the contemporary investment portfolio. According to what has been said by the proponents of these two theories; when the optimal return is realized, the efficiency of the market is achieved in terms of perfect information on prices and risk that supposed to be predetermined in a rational way.

he other question that imposed here is “at what time people should be rational in their investments in the security markets ?”. This means that investors are rational for their efforts devoted to utility maximization, which are p

Target costing is one of the modern techniques in strategic Management accounting, Is has shown active adoption to changes in current business environments, In addition, is has seen a growth in strategic approach, The goal of using target costing is to build and strengthen competition abilities of economic units through introducing appropriate ways to decrease cost values while maintaining and improving quality of product, So this study is aim to show how can  economic units use target costing to achieve competitive advantages .