In the present work, the fabrication techniques of type of Nd +3-glass laser active
media : namely, Neodymium- Tellurite glass, where the glass system(TeO2(1-x) - BaOZnO-
Nd2O3x) for values of (X=1,1.5,2,2.5,3,3.5 wt%) was used.
Measurements have been taken for the signal of fluorescence spectrum of Nd+3- glass
samples. The fluorescence spectrum, for one of the samples, has been taken, after the
sequences of polishing for the out surface.
The results give signal of fluorescence spectrum for the samples. Intensity of the peak of
the signal increases with Nd +3 concentration. The fluorescence at (l=1.06 mm) for one
of the samples has been detected and the fluorescence line width was (100 cm-1). The
cross section of stimulated emission for this type of laser active media (sp(lp=1.06
mm)=3.59*10-20 cm2), and the results compared with the published data.
The research aims to identify the level of increase or decrease the product cost through the activity based flexible budgeting that gives us the chance to follows the cost since the product is planed to be made till it appears in the market and it also helps to fined out any problems that are expected to happen in the future and to put the costs under control, also to know much the surveying affects the perfect use for the complete resources in order to be used in the demanded way, the research is divided in to three sides ,the first is specialized for the theoretical side, the second is for the partical side, while the third side is specialized for the conclusions and recommendations.  
... Show More
Background: The irradiation of teeth with a laser results in an interaction between the light and the biological constituents of the dental hard substance, which is converted directly into heat.This thermal effect is the cause of the structural and chemical enamel changes.The combined treatment of topical fluoride agent with laser may increase fluoride uptake, and reduce progression of caries-like lesions. The aim of this study was to measure the uptake of the acidulated phosphate fluoride and sodium fluoride to the buccal and lingual caries-like lesion enamel surfaces before and after irradiated by Nd-YAG laser in comparison with matching control group. Materials and methods: The sample consisted of 30 human healthy upper premolar teeth wh
... Show Moreأدوات الىفي الذاخلة على الجملة التحويلية الاسمي
ان التحول في الحياة الاقتصادية الناتج عن التقدم التكنولوجي وتقنية المعلومات في مجالات الفضاء والتقدم في الاتصالات السلكية واللاسلكية والالكترونيات الدقيقة مكنت الشركات من ارسال كميات هائلة من البيانات بتكاليف منخفضة.
وان انتشار الشركات متعددة الجنسبة والتي سعت لتحقيق السيطرة على اقتصاديات العالم من خلال فروعها المنتشرة فتحتاج الى نظم للانتاج والتكاليف ونظم للمعلومات الادارية والمحاس
... Show More
افرض ان (X1, X2, …. , Xn) هي عينة عشوائية من توزيع له دالة احتمالية الكثافة . المثال المعتاد في مثل هكذا تقدير للامكان الاعظم (MLE) هو ليس وحيد باخذ ليكون كثافة منتظمة عليه، مثل .
انظر [Bicked and Doksum (1977, P111)] او [Hogg and Craig (1978, P(207)] بالاضافة الى احضار بعض الامور غير الطبيعية.
... Show More
تكفل الدساتير الملكية العامة للمواطنين جميعاً (1)، كما تصون الملكية الخاصة (2)، والملاحظ بجلاء أن الدستور في اطار حمايته للملكية العامة والخاصة يطلقهما دون مقيد، ويعممهما دون مخصص، ومؤداه أن الأصل هو ضمان الملكية بنطاقها الشخصي والموضوعي المطلق أما الاستثناء عليهما يستوجب التصريح ولا تغني الدلالة أو التأويل دون نص مخصص أو مقيد يرد في الدستور، مما يتطلب من القضاء الدستوري أن يبسط ولايته على حماية هذا النط
... Show More
الترسيب اللاكهربائي للنحاس باستخدام الفورمالديهايد كعامل مختزل واستخدام الفضة كعامل مساعد في تفاعلات الترسيب على المواد غير الموصلة مثل لدائن ABS لغرض استعمالها بصورة رئيسية في لوحة الدوائر الكهربائية للاجهزة الالكترونية. تم دراسة تأثير تراكيز الفورمالديهايد (10-100) مل/لتر وتراكيز ملح روشيل (10-150) غم/لتر على معدل الطلاء. وجد ان الظروف المثلى لتحقيق الطلاء هي 70 مل/لتر للفورمالديهايد و 94 غم/لتر لملح
... Show MoreResearch revealed the most important things:
1 - that the sentence if the nominal manufacturing according to one of the main frames for the construction of the original sentence or the nucleus called the obstetric and called the nominal or actual.
2 - is not an element of denial. Some of them counted in the Acts the people of Basra are missing and some of them are counted conjunction Menem people of Kufa and promise of the tools of the exception and some of them promise to benefit neglected exile is not Flaaml have at this team.
- What precluding it have a characteristic which they enter the actual sentence and never let an impact on the act, and the intervention of the nominal sentence Fathol
The effect of laser radiation on human aorta, coronary, and pulmonary arteries, and pulmonary veins has been investigated. Xenon-Chloride (eximer), Nitrogen, and Nd-YAG pulsed lasers of wavelengths 308, 337, and 1060 nm respectively were used. Their effects on fresh postmortem tissues, normal and diseased, was studied. The diameter and depth of ablation of the exposed tissues, in air, were measured as a function of many factors related to the type of laser and nature of the tissue. The effect of properties of the applied lasers, such as average power density and deposited energy density, on the exposed tissue surface were studied. The increase of these two parameters cause an increase in the depth and diameter of ablation. However the di
... Show MoreSeveral types of laser are used in experimental works in order to study the effects of laser on blood vessel. They differ from each other by a lot of properties mainly in wavelength, energy of the laser and pulse duration. In this study argon laser (488 nm- 514 nm) and continuous Nd: YAG laSer (1064 nm), have been applied to 50 samples of sheep blgod tesselS. Histologically, tha results of the study were different According to the txpe of L`sar used; apgon larer had distrabtave effects on $he blood vessal while continuous Nd: YAG laser Appeaped to be the safesd one on the blmod vessel architecture. This study concluded that argoj laser has da-aging ef&ect on
... Show More
(1)