بحث بسيط
السجلات المعروضة 31 -- 40 من 176
Ultrasonic and thermal properties of γ-irradiated low-density polyethylene
(
John Wiley & Sons, Inc.
, 1993 , Article)
The ultrasonic pulse-echo technique and differential thermal analysis were utilized to characterize and to monitor the effect of ?-irradiation on the sonic modulus and the heat effect of low-density polyethylene. The sonic ...
أسس نظرية المعرفة اليقينية بين الفكر الديني والفلسفي
(
دار الحكمة - الدوحة
, 1993 , Book)
المقدمة
هناك معضلة فكرية مهمة تتصل ببنية الحضارة الإسلامية وما تتطلبه هذه الحضارة من أسس ومقومات تقوم عليها، وهي: هل لدى المسلمين مناهج خاصة بهم، اكتشفوها بأنفسهم دون أن تشوبها شائبة مقحمة عليها من الخارج؟ بمعنى هل قامت ...
A Coupled Vector-scalar Potential Method For Permanent Magnet Modeling in Large-scale 3d-Fe Magnetic Field Computations
(
IEEE
, 1993 , Conference Paper)
This paper introduces a magnetic scalar potential (MSP) formulation of permanent magnet (PM) modeling. This formulation is suited for use in coupled (combined) vector-scalar magnetic potential (CMVP-MSP) 3D-FE algorithms ...
On Transformations and Perturbations of Orthogonal r-Frames
(
WILEY-VCH Verlag GmbH & Co.
, 1993 , Article)
A decomposition of Cn into a finite direct sum of orthogonal subspaces can be conveniently represented by its orthogonal projector frame, which is the collection of the corresponding orthogonal projectors. Two such ...
الزيادة الطبيعية ودورها في معالجة الخلل السكاني في دولة قطر
(
جامعة الكويت
, 1993 , Article)
من المعروف أن نسبة عالية من سكان دول الخليج هم من غير المواطنين ، فعلى سبيل المثال ، فهؤلاء يمثلون أكثر من 70% في كل من الكويت والإمارات وقطر . هذا البحث العلمي يحاول الإجابة على السؤال : إلى أي مدى تتمكن الزيادة الطبيعية ...
Studies On Some Fetal Rat Organs Following Maternal Hyperthermia
(
Qatar University
, 1993 , Article)
The present investigation was carried out to determine the histological changes in brain, liver and kidneys of rat fetuses maternally heatstressed at early stage of pregnancy to either high "spiking" temperature of short ...
Efficiency Of Ground Water Resources In Northeast Sinai Peninsula, Egypt
(
Qatar University
, 1993 , Article)
The present study deals with actual quantitative and qualitative evaluation of the groundwater resources in El Sheikh Zuwayid-Rafah area, the northeast coast of Sinai Peninsula. The quantitative analysis is achieved by ...
Analytical Studies Of Some Controlled And Noncontrolled Drugs Of Abuse (II)
(
Qatar University
, 1993 , Article)
Benzodiazepines, barbiturates, amphetamines and some other non-controlled drugs were identified by GLC and HPLC then confirmed by GC-MS techniques. Comparative studies and discussions on the results obtained by GLC and ...
On The Prawn Fisheries in the Gulf of Suez, Egypt
(
Qatar University
, 1993 , Article)
Prawn fisheries in the Gulf of Suez constitute about 13.7% of the total fish and shrimp landings. About 11% are made up by three penaeid species namely: Penaeus japonicus Bate, Penaeus semisulcatus De Han and Penaeus ...
Biosynthesis of Single Cell Protein (SCP) By Yeasts from Crude Chicken Waste
(
Qatar University
, 1993 , Article)
Three strains of yeasts have been grown on media consisting of Chicken waste (CW) as a sole source of carbon and nitrogen in different concentrations. The nutrient medium which contains 2% CW extract was found to be the ...