Abstract The permittivities and dielectric losses of 2-Piperedone, -Caprolactam, 2-Azacyclooctanone and 2-Azacyclononanone have been studied in chloroform solutions. They have been measured using Q meter at frequency range 150KHz to 15MHz.Both 2-Piperedone and -Caprolactam solutions were studied at concentration range 0.05 to 0.25M and over temperatures range of -10 to 45 and. The dielectric studies of 2-Azacyclooctanone solutions cover a concentration range 0.05 to 0.125M and over temperature range of -10 to 45, while that of 2-Azacyclononanone solutions were studied at concentration range 0.01 to 0.075M and over temperature range of -10 to 45. The permittivities at higher concentrated solutions up to 1.5M of 2-Pipere-done, -Caprolactam and 2-Azacyclononanone were also measured at 2MHz using dipole meter DM01 over the temperature rang -10 to 45.The static permittivities for the four systems were discussed as the affect concentration, temperature and the number of CH2 group in the cyclic amides. All show normal behaviour except that the CH2 does not show clear affect. Single relaxation process were observed for the studied compound in the chloroform solutions ( =10-9 sec). All cases, the presence of a relaxation process was established at frequencies higher than used here. These relaxation processes were discussed in terms of their relation to concentration and the number of CH2 group. The dielectric activation energies were calculated using Eyring equation. The obtained values were discussed also in terms of concentration affect. A dependence of on concentration was observed. The dipole moments for the four studied compounds in solutions were evaluated using of Cole-Cole a semicircle plots, which considered to be associated with the relaxation process and other dipole moments were evaluated using =. This was assigned as an apparent dipole moment. All these dipole moments were discussed in terms of concentration and temperature affect. The obtained dipole moments in all studied case were much larger than those expected for planer dimers association. So they assigned to the presence of dimers and trimer or tetramers association in the studied solutions.Kirkwood correlation factor for the studied systems were calculated and discussed as a function of concentration. All values of g are less than unity and were assigned to a cyclic association form.
لطفية صادق حسن المجدوب (2010)

Abstract In this thesis, we study different numerical methods used to solve ordinary differential equations of the first and second orders and where related important definitions are given . We will concentrate first on Differential Equations of the first order and the truncation errors which are derived for various methods and those compared with the expected errors , whenever possible . Two applications were given in science of biology and physics which were studied in details . Finally we draw our attention to ordinary differential equations of the second order where we study initial-value problems and boundary-value problems with the application of the wellknown numerical procedures :the shooting method and the finite difference method . The important conclusion we came up with is that the truncation error is always greater than the expected error for all methods used, and this which was expected .
عفاف احمد الجطلاوي (2014)

أتاحت طريقة البوتستراب ( Bootstrap) التي قدمها العالم إيفرون (Efron, 1979) إجراء العديد من الأبحاث في مجال الاحصاء وغيرها من المجالات , والتي كانت لولا ذلك ستكون صعبة إن لم تكن مستحيلة. لقد أصبحت طريقة البوتستراب تأخذ جانباً مهماً في أغلب البحوث الإحصائية خاصة فيما يتعلق بالبحوث الطبية. تم في هذه الورقة تزويد الباحث بمقدمة مختصرة عن طريقة البوتستراب, كما تم تقديم شرح مبسط لكيفية استخدام الوتستراب لحساب الخطأ المعياري لمتوسط العينة, والخطأ المعياري لوسيط العينة, بالإضافة إلى كيفية استخدام طريقة الوتستراب في تكوين فترات ثقة لكل من المتوسط الحسابي والوسيط بمستوى ثقة معين باستخدام طريقة فترة بوتستراب المئوية (percentile Bootstrap Interval). لتمكين الباحث من تطبيق طريقة البوتستراب بكل سهولة ويسر فقد تم في هذه الورقة تقديم شرح وافي وواضح لكيفية تطبيق طريفة البونسراب باستخدام برنامج ماتلاب (MATLAB Software), وفي نهاية الورقة تم تقديم دالة ماتلاب, تحمل اسم Bootstrap_ci , وظيفتها الأساسية هي ايجاد فترات ثقة لمتوسط ووسيط المجتمع باستخدام طريقة البوتستراب المئوية.
سعاد محمد احمد البرقاوي, البهلول عمر شلابي(12-2021)