Now showing items 732-751 of 2240

    • The Optical properties of Cadmium Stannate (Cd2SnO4) Thin Films Prepared by Chemical Spry Pyrolysis Technique 

      Al Dileamy, Mazen N; Al Naimi, Sabah M. ( Qatar University , 2004 , Article)
      Thin films of cadmium stannate were prepared using thermal chemical spray pyrols: Cadmium stannate' solution (0.2M) was prepared by dissolution of CdCl25H2O in C2H5OH tion of SnCl23H2O in CH3COOH at molar 2:1, respectively. ...
    • Optical Properties Of Oxidated Blown Asphalt Films 

      Hashim, A. A. [ا. أ. هشام]; Yousif, S. Q.; Agha, M. H. ( Qatar University , 1996 , Article)
      Films of purified blown asphalt of high grades of oil and the accompanied adulterated particles derived from its manufacturing process, that is, it was purified 98%. This study focused on optical properties in the wavelength ...
    • Optimizing Use Of Marshall Asphalt Mix Design 

      Lindly, Jay ( Qatar University , 1997 , Article)
      Rutting has been a problem in Qatar's highway pavements since it began designing asphalt mixtures with the Marshall Method in the early 1990's. This paper describes specifications and rules-of-thumb which have been ...
    • Optimum Cutting Schedule Of Reinforcing Steel Bars 

      Senouci, Ahmed B.; El-Bahrawy, Aly N. ( Qatar University , 1999 , Article)
      Reinforcing steel bars are generally procured in standard lengths. The cutting of standard steel bars to the specified lengths usually yields an appreciable amount of steel waste. Minimization of steel waste problem is of ...
    • Optimum Design Of Concrete Slab Forms 

      Senouci, Ahmed B. ( 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 ...
    • An Optimum Performance of A Flat-Type Solar Air Heater With A Porous Absorber 

      Hassab, M. A.; Sorour, M. A.; Elewa, F. A. ( Qatar University , 1989 , Article)
      This investigation is concerned with the design and performance of a flat solar air heater in which air flows perpendicular from a vented transparent cover through a porous absorber plate. The design phase involves a ...
    • Organic Petrology Of Oil Shales In Quseir-Safaga District, Egypt 

      Khalid, K. A. [خالد احمد خالد] ( Qatar University , 1992 , Article)
      The kerogen and hydrocarbon-generating potential of oil shales from three mining districts in the Red Sea province of Egypt have been investigated using microscopy and elemental analysis. The results reveal that, the ...
    • Organisational commitment in the banking sector in Jordan: An Empirical Investigation 

      Al Shaikh, Fuad Najib ( Qatar University , 1995 , Article)
      This study investigates organisational commitment of employees in the context of Jordanian banking industry. It aims at exploring this concept and identifying the factors that may influence it. Commitment was measured by ...
    • Origin And Tectonic Environment Of The Pan-African Rocks Of Abu El Tiyur Area, Eastern Desert, Egypt 

      El Kaluiobi, B. A. [باهر عبد الحميد القليوبي]; El Alfy, Z. N.; Ragab, A. I. ( Qatar University , 1995 , Article)
      The present paper deals with the geochemistry and origin of the Pan - African basement rocks, which covers about 825 km2 North of Abu El Tiyur area, in the Central Eastern Desert of Egypt. The petrochemical character of ...
    • Overhead Allocation: a Goal Programming Approach 

      Badran, Yehia [يحيى بدران] ( Qatar University , 1981 , Article)
      Overhead is an incurred cost which is matched against cost objects via an intervening base of allocation. The problem of overhead allocation is to come up with a cost allocation procedure which is objective, applies, ...
    • Oxidative Addition Reactions of Sn(II) And Pb(II) with Some Hydrazide And Hydrazone 

      Amin, Ragab R. [رجب رياض امين] ( Qatar University , 2000 , Article)
      Bivalent tin compounds can be easily transformed to tetravalent compounds by oxidizing agents. The use of ortho-quinones for oxidation of transition metals has been the subject of many publications, but few analogous studies ...
    • p,q Ideal of Operators in Banach Spaces 

      El Shobaky, E. [انتصارات محمد حسن الشبكي] ( Qatar University , 1981 , Article)
    • p-cds/n-Si Anisotype Heterojunction solar cells wih Efficiency of 6.4% 

      Ismail, Raid A. [رائد عبدالوهاب إِسماعيل]; Al Samarai, Abdul Majeed E. [عبد المجيد عيادة السامرائي]; Sultan, Omar A. A. [عمر عبد الستار عبد الرزاق سلطان] ( Qatar University , 2005 , Article)
      In the present paper, p-CdS/n-Si heterojunction solar cells are prepared for the first time by the spray pyrolysis technique. Using such low-cost method, cells with 6.4'/o AM1 conversion efficiency ina O.ZZ fill factor ...
    • The P-Center And The P-Median Problems In Graphs With Small Number ' Of Spanning Trees 

      Hassan, M. H. [محمد حسن حسن] ( Qatar University , 1996 , Article)
      In this paper, we will describe some algorithms and give their complexity as following: (1) The algorithm for finding a dominating set of radius r in a vertex-weighted graph with small number of spanning tress. The ...
    • A Packed Column Gas Liquid Chromatographic Method For Characterization And Determination Of Unsaponifiable Matter In Oils 

      Abou-Hadeed, A. M. F.; أبو حديد, أشرف محمد فريد ( Qatar University , 1991 , Article)
      A packed column GLC method for the detection and determination of the components of unsaponifiable matter in oils is described. Squalene, 8 -tocopherol and short chain hydrocarbons with up to 26 carbon atoms are determined ...
    • Palaeozoogeography of Shallow Marine Ostracoda from Holocene Sediments-Southern Iraq 

      Al Jumaily, Wajih A. K. [وجيه الجميلي و س]; Al-Sheikhly, S. S. ( Qatar University , 1999 , Article)
      The Holocene palaeozoogeography of southern Iraq (Southern Mesopotamian Basin) have been studied according to the distribution of thirteen species of shallow marine ostracoda belonging to twelve genera. Their distributary ...
    • Paleoecology, palynofacies, thermal maturation and hydrocarbon source-rock potential of the Jurassic-Lower Cretaceous sequence in the subsurface of the north Easern Desert, Egypt 

      Ibrahim, M. I. A.; Aboul Ela, Nabil M.; Kholeif, Suzan E.; إبراهيم, محمد إسماعيل; أبو العلا, نبيل; خليف, سوزان... more authors ( Qatar University , 1997 , Article)
      The Jurassic to Lower Cretaceous sequences in the wells Abu Hammad-1, Q-71-IX and Kabrit-1, north Eastern Desert of Egypt, have yielded palynofacies assemblages of varying composition. Seven palynofacies types which are ...
    • Paleozoic Igneous Activity In Egypt 

      Meneisy, M. Y. [محمد يسري منيسي] ( Qatar University , 1989 , Article)
      Based on available isotopic age data, including a few K/Ar ages obtained by the writer, a geochronological sequence of the main phases of igneous activity in Egypt during the Paleozoic is presented. Five main phases at ...
    • Pan African Basement Of Bir Safsaf Area East Sahara African Craton 

      Azzaz, S. A. [سيد ابو ضيف عزاز]; Soliman, M. M.; Sabet, A. H.; El-Tokhy, M.; Elbaroudy, A. F. ( Qatar University , 1994 , Article)
      Bir Safsaf area occurs at the extreme southern part of the Western Desert of Egypt. It is covered by the Pan African Basement represented by the old continental gneisses and migmatites comprising granitic, granodioritic ...
    • Pan African magmatism in the Zabara District, Central Eastern Desert, Egypt: Geochemistry and Petrogenesis 

      El Sayed, M. M. [محمد محمد السيد] ( Qatar University , 1997 , Article)
      The rocks of the Zabara district include ophiolitic and non-ophiolitic sequences. The ophiolitic ones are metagabbro and metabasalt associated with metasediments, whereas the non -ophiolitic sequence includes intermediate ...