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Effects of electric and magnetic fields on the energy levels of a hydrogenic impurity in GaAs/Gal-xAl x As heterjunction
(
Qatar University
, 1997 , Article)
Variational method within the effective — mass approximation is used to calculate the shallow impurities states in GaAs / Gai_xAl^As heteroj unctions. Modified Fang-Howard wavefunction is used as the trial wavefunction. ...
من اخبار يزيد بن معاوية رضي الله عنه
(
Qatar University
, 1997 , Article)
The role of radiogenic heat in maturation of organic matter within oil shales of Duwi formation in Quseir-Safaga District, Red Sea coastal area, Egypt
(
Qatar University
, 1997 , Article)
The oil shale beds of Duwi Formation at Quseir-Safaga district in Egypt show a high content of organic matter (kerogen) and a fair pyrolysis oil yield. Kerogens of these rocks are composed mainly of marine amorphous and ...
Geochemical studies using trace elements analysis of source rocks and related crude oil in the Gulf of Suez, Egypt
(
Qatar University
, 1997 , Article)
The occurrence and distribution of trace elements in source rocks and crude oils is used to asses the process of geochemical exploration. Rock and crude oil samples representing the giant fields of the Gulf os Suez province ...
العلاقة بين تقبل المعلمات للأطفال وإقبال الأطفال على المعلمات في ضوء بعض المتغيرات
(
Qatar University
, 1997 , Article)
Bayes Estimation of the Parameter of Burr Type II Distribution in Case of Type II Censoring
(
Qatar University
, 1997 , Article)
Suppose that Xj, X2, ..., Xn is a random sample of failure times from a Burr type II (B2) distribution
with parameter 9. Let x = (xj, x2, , xr) with xj < x2 S x3 < < xr be the observed failure censored
sample of the first ...
فاعلية مشعرات الاسترجاع في تذكر طلاب المرحلة الثانوية بمدينة المنيا
(
Qatar University
, 1997 , Article)
تهدف هذه الدراسة إلي تعرف: أنماط مشعرات الاسترجاع التي يستخدمها طلاب المرحلة الثانوية، والفروق في استخدام هذه الأنماط تبعا لمتغيري الفرقة الدراسية، والجنس، ومشعرات الاسترجاع التي يفشل طلاب المرحلة الثانوية في استخدامها، ...
Phyllosphere and phylloplane fungi of some herbal plants belonging to Labiatae, Solanaceae and Umbelliferae in Egypt
(
Qatar University
, 1997 , Article)
Survey on the occurrence of phyllosphere and phylloplane fungi on leaves surface of 15 different kinds of fresh herbs (three samples of each kind) belonging to three plant families (five kinds belonging to each of Labiatae, ...
Simplified Method For Plate Deflection Calculation
(
Qatar University
, 1997 , Article)
This paper presents a simplified method for the calculation of thin-plate deflections. The method, which deals with uniformly loaded plates, uses the stiffness method to obtain plate deflection equations for specified ...
دراسة في المصادر الرسمية لتاريخ أسرة يوآن المغولية
(
Qatar University
, 1997 , Article)