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Now showing items 1291-1300 of 1388
Distribution And Mineralogy Of The Clay Deposits In Saudi Arabia
(
Qatar University
, 1993 , Article)
The main goal of this paper is to characterize the mineral clay deposits in Saudi Arabia; especially their mineral composition, deposit size, geological setting and possible uses. Different published reports and papers on ...
Decomposition of a Special Type of Machines
(
Qatar University
, 1994 , Article)
In this paper, the concept of a finite n-state cyclic machine An is defined. These machines are then completely characterized using the prime factorization of n. Specifically, it is proved that any finite-state cyclic machine
Effect of chemical grafting on the surface structure of porous bentonite as a support in gas chromatography
(
Qatar University
, 1994 , Article)
The effect of thermal and chemical treatments on the variation of specific surface area of porous bentonite as a support was studied. The surface area of bare bentonite thermally treated at 950°C and then washed with ...
Factors Governing Mosquito Susceptibility To Bacillus Sphaericus Strains
(
Qatar University
, 1992 , Article)
Three lyophilized strains of Bacillus sphaericus (1593-4, 2297 and SSII) were tested against four different mosquito species. Culex pipiens larvae demonstrated the highest level of susceptibility towards the 3 B. sphaericus ...
مصدر الضبط وعلاقته بكل من قوة الأنا والعصابية والانبساط لدى عينة من طلبة وطالبات الجامعة بدولة قطر : دراسة عاملية مقارنة
(
Qatar University
, 1993 , Article)
هدفت هذه الدراسة إلى فحص العلاقة بين مصدر الضبط وكل من قوة الأنا، العصابية، الانبساط، وذلك على عينة من طلبة وطالبات جامعة قطر وذلك بواقع (101) من الذكور و (103) من الإناث، وقد قسمت عينة الدراسة إلى أربع مجموعات، مثلت ...
Monovalent Anion Interaction on the Electron Flow of Photosystem II in Soyabean Cells
(
Qatar University
, 1994 , Article)
Steady state of electron transport measurements from water to DMQ (2, 5 - dimethyl - P- benzoquinone) show a maximum bicarbonate effect (about four fold stimulation) following the addition of 5 mM HCO"3 to the previously ...
Pollen Morphology of some Cultivated Varieties of Strawberry
(
Qatar University
, 1999 , Article)
Pollen grains of twelve cultivated varieties of strawberries grown in Egypt were morphologically studied using both light microscopy and SEM observations. These varieties include eleven cultivars of Fragaria x ananassa ...
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 ...
Optimum Design Of Concrete Slab Forms
(
Qatar University
, 1996 , Article)
This paper presents a design optimization method for concrete slab forms. This procedure was formulated to provide a safe slab form design with minimum cost. The proposed method considers in its design process the cost of ...
الأساس المعرفي في تصميم التدريس - تحليل مفاهيمي
(
Qatar University
, 1996 , Article)
تهدف الدراسة الحالية إلى تعزيز دور الأساس المعرفي في تصميم التدريس نظراً لعدم وجود نماذج واضحة متبلورة توضح هذا الأساس سواء في الأدب النفسي والتربوي، أم في أدب تصميم التدريس.
وقد استخدمت الدراسة نموذج التحليل المفاهيمي ...