Browsing University Publications by Title

Now showing items 1412-1431 of 4355

    • The One Dimensional Inverse Spectral Problem Of A Generalized Stationary Schrodinger Equation 

      Megahed, F. A. [ف . ا. مجاهد]; Darwish, A. A. ( Qatar University , 1996 , Article)
      In this paper we study the inverse problem on the half line for a generalized stationary one dimensional Schrodinger equation. We consider the solutions of the differential equation and study its properties. Given the ...

    • Onset of Convection in a Liquid Film Flowing 

      Hassab, M. A. ( Qatar University , 1990 , Article)
      The thermal instability of a vicsious liquid film flowing down an inclined plane heated from below is studied analytically. The effects of Biot number at the free surface, the inclination, the Prandtl number and the Reynolds ...

    • The Onset Of Resonance In Two-Immiscible Fluids Inside A Spinning And Coning Cylinder 

      Selmi, M. ( Qatar University , 1993 , Article)
      Resonance of the motion of two fluids inside a cylinder that spins about its axis and rotates (cones) about an axis that passes through its center of mass is known to occur for low-viscosity fluids (high Reynolds number ...

    • Open a GLAM Lab 

      Mahey, Mahendra; Al-Abdulla, Aisha; Ames, Sarah; Bray, Paula; Candela, Gustavo; ... more authors ( QU Press , 2019 , Book)
      Defining a GLAM Lab: A Galleries, Libraries, Archives and Museums (GLAM) Lab is a place for experimenting with digital collections and data. It is where researchers, artists, entrepreneurs, educators and the interested ...

    • Open-ended cloze procedure and multiple - choice cloze procedure: similarties and differences 

      Al-Buainain, Haifa; البوعينين, هيفاء ( Qatar University , 1991 , Article)
      This paper is a validation of two cloze procedures: Open-Ended and Multiple-Choice (henceforth OE and MC respectively). Open-Ended and Multiple-Choice tests on the same text were administered to 60 English majors in their ...

    • Operation And Maintenance Of Sewage Treatment Plant In Doha 

      Shadid, Fawzi T.; Ahmed, Shamim ( Qatar University , 1992 , Article)
      The sewage treatment plant in Doha-South uses primary, secondary and tertiary treatment units for treating predominantly domestic sewage. The treated effluent, is used in irrigating agricultural farms for growing animal ...

    • Operational Performance and Safety Assessment of Signalized Roundabout 

      Hannun, Jameel; Hannun, Jamal; Shamiyeh, Khaled; Ghanim, Mohammad; Kharbeche, Mohamed ( Qatar University Press , 2020 , Poster)
      Roundabouts are widely used to reduce the severity of conflicts at intersecting roads. While they tend to provide an acceptable level of traffic operation, their operational benefits are reduced when traffic demands increase. ...

    • Ophioglossum polypyllum, A. Braun a new record for Qatar 

      Abdel Bari, Ekhlas M.M.; عبد الباري, اخلاص محمد ( Qatar University , 1995 , Article)

    • The Optical and Electrical Properties of Low Density Polyethylene Films in CuSo4 Solution 

      Al Naimi, Sabah M. [صباح النعيمي] ( Qatar University , 2005 , Article)
      The optical and electrical properties of pure and treated low density polyethylene (LDpE) were investigated. These measurements have been carried out at various times of immersion for LDPE films in 10% solution of CuSO+. ...

    • Optical Matching For Microwave Active Devices 

      Hindy, Moataza A. ( Qatar University , 1997 , Article)
      This paper describes a microstrip optically controlled matching technique between microwave active devices with low impedance (less than 10 ohms) and a conventional 50 or 70 ohm communication system in the upper microwave ...

    • Optical Non-invasive Technique for Cholesterol Detection in Blood 

      Prasad, D N; Al-Maadeed, Sumaya; Abdul Muthalif, Asan; Sadasivuni, Kishor Kumar ( Qatar University Press , 2021 , Poster)
      The aim of this research is to design and develop a non-invasive cholesterol sensor based on the principle of light absorption. The current existing invasive methods can be replaced with non-invasive techniques. The ...

    • 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 ...

    • Optimal Pricing and order quantity strategies for a firm offering multiple products facing customers cannibalization and random market demand 

      Al-Zaini, Hamoudeh S.; Raza, Syed A. ( Qatar University , 2010 , Article)
      This paper studies a firm’s profitability problem offering its products into different market segments at differentiated prices. In order to improve the firms’ profitability the firm needs to decide the prices and order ...

    • Optimization Models For Multiple Resource Planning 

      Z. Al-Dossari, Norah Mohammed; Haouari, Mohamed; Kharbeche, Mohamed ( Qatar University Press , 2021 , Poster)
      Multiple resource planning is a very crucial undertaking for most organizations. Apart from reducing operational complexity, multiple resource planning facilitates efficient allocation of resources, which reduces costs by ...

    • Optimized DNA Extracting Method for Oxford Nanopore- Long reads Sequencing from Marine samples 

      Boughattas, Sonia; Al Batesh, Dana; Giraldes, Bruno W; Al-Thani, Asmaa A.; Benslimane, Fatiha M. ( Qatar University Press , 2020 , Poster)
      Sustaining social and economic growth is impossible without a holistic environmental vision that places environmental preservation for Qatar's future generations at the forefront. According to the ministry of development ...

    • Optimizing the Thermal Resistance of Concrete Using The Palm Tree Fronds Fibers 

      Yassin, Mohammad Hany; Lakys, Rana; Ahmed, Taha; Al-Refaei, Shafaq; Omar, Bader Al-Sayed; ... more authors ( Qatar Univesrity Press , 2020 , Conference Paper)
      In the past few years, the issue of global warming has become increasingly visible. Record high as well as record low temperatures are being broken worldwide. Snow is melting in the poles and less sunrays are being reflected ...

    • 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 ...