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السجلات المعروضة 12693 -- 12712 من 27452
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Key Success Factors and Their Impact on the Performance of Construction Projects: Case in Qatar
( Multidisciplinary Digital Publishing Institute (MDPI) , 2023 , Article)The success of a construction project depends on different factors, the knowledge of the project managers, and the type of project being developed. In this paper, based on a review of the literature, 23 factors are identified ... -
Key-policy attribute-based encryption with keyword search in virtualized environments
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Cloud computing is a model for convenient, on-demand network access to virtualized environments of configurable computing resources. It is challenging to search data encrypted and stored in cloud storage servers. Searchable ... -
Keynote Speech by Dr. Syed Farid Alatas on Contemporary Significance of Ibn Khaldon
( Ibn Khaldon for Humanities and Social Sciences Center - Qatar University , 2019 , Video)The origin of the video is the keynote of Speaker Prof. Syed Farid Alatas at the International Symposium on Sociology and the Question of Indigenization held by the Ibn Khaldun Center on October 26, 2019 This video ... -
Keynote: Vernacular architecture and typology
( Istanbul Teknik Universitesi, Faculty of Architecture , 2016 , Article)[No abstract available] -
The keyword method: a powerful memory aid to vocabulary learning in the EFL classroom (An experimental study)
( Qatar University , 2000 , Article)Most research methods on the keyword method were based on evidence from lab experiments. This study investigated the use of the keyword method in a normal classroom situation. 45 Arab students were taught the definition ... -
Khalasa date palm leaf fiber as a potential reinforcement for polymeric composite materials
( Elsevier Ltd , 2021 , Article)The circular economy (CE) proposes a closed-loop supply chain-based production system and reduces the ecological systems' negative impacts. CE proposes a paradigm shift from a linear economy to a circular economy with the ... -
Khashm Formation, A New Lithostratigraphic Unit Within The Cretaceous Wasia Group Of Arabia
( Qatar University , 1988 , Article)The Khashm Formation is introduced as a new lithostratigraphic unit to include the sandstones and shale interbeds which constitute the upper part of the Cretaceous Wasia Group (s. /.) outcropping in central Arabia. It ... -
Kidney-on-a-chip: untapped opportunities
( Elsevier B.V. , 2018 , Article Review)The organs-on-a-chip technology has shown strong promise in mimicking the complexity of native tissues in vitro and ex vivo, and recently significant advances have been made in applying this technology to studies of the ... -
Kinematic analysis of postural control in gymnasts vs. athletes practicing different sports
( Springer-Verlag Italia s.r.l. , 2017 , Article)Purpose The aim of this study was to examine the postural control difference between gymnasts and other athletes practicing different sports. Methods Twenty-eight elite-level male athletes (7 gymnasts, 7 volleyball ... -
Kinematically admissible folding mechanisms for the progressive collapse of foam filled conical frusta
( Springer Netherlands , 2018 , Article)In this paper, the progressive collapse of foam filled conical frusta is investigated analytically using four different kinematically admissible folding mechanisms with varied straight folds. Comparisons are made between ... -
Kinetic and thermodynamic investigation of CO2 adsorption-desorption on polyethyleneimine - Mesoporous silica
( TechConnect , 2016 , Conference Paper)Two CO2 solid sorbents based on polyethyleneimine, PEI (432 and 10k) impregnated into mesoporous silica (MPS) foam were synthesized and tested for CO2 capture. At ambient pressure, the amount of CO2 captured by these solid ... -
Kinetic Determination of Morphine in Illicit Powders, Using a Fluoride Selective Electrode, Based on Reaction with 1-Fluoro-2,4-dinitrobenzene
( Springer New York , 1996 , Article)A simple, accurate and selective method is described for the determination of morphine in illicit powders, based on monitoring the initial rate of fluoride ion liberation from the reaction of morphine with 1-fluoro-2,4-d ... -
Kinetic investigations into the synthesis of disulphides via tetrathiomolybdate as a sulphur-transfer reagent
( Kluwer Academic Publishers , 2014 , Article)Kinetic and mechanistic aspects of the conversion of halides to disulphides using benzyl triethyl ammonium tetrathiomolybdate as sulphur-transfer reagent were investigated. The reaction follows a 1:1 stoichiometry with ... -
Kinetic modeling of microalgae growth and CO2 bio-fixation using central composite design statistical approach
( Elsevier B.V. , 2020 , Article)The optimum growth (μ), CO2 bio-fixation (RCO2) rates and the energy ratio (ER) of microalgae Chlorella vulgaris (C.v) were identified using central composite design statistical approach (CCD-SA). μ and RCO2 parameters ... -
Kinetic studies of POSS–DGEBA precursors derived from monoamine functional POSS using dynamic dielectric sensing and nuclear magnetic resonance
( John Wiley and Sons Inc. , 2018 , Article)Incorporation of pre‐reacted monofunctional polyhedral oligomeric silsesquioxane (POSS)–epoxy adducts dramatically improves dispersion of POSS in epoxy–amine networks. The relationship between reaction kinetics and mechanism ... -
Kinetic Study Of The Crystallization Of Lldpe And Wax In Lldpe/wax Phase-change Blends Used For Thermal Energy Storage
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Conference Paper)Phase-change materials are used to store and release energy through phase changes, be it melting and solidification processes or solid state phase transitions. Among a large number of phase-change materials are paraffin ... -
Kinetic study of the thermo-oxidative decomposition of metformin by isoconversional and theoretical methods
( Elsevier , 2020 , Article)The drug metformin is the most prescribed drug to treat type II diabetes and has been recently reported to have anticancer activities. Because of its wide use, its potential risk on the environment is extremely concerning. ... -
Kinetic, equilibrium and thermodynamic studies for adsorption of nickel ions onto husk of oryza sativa
( Desalination Publications , 2019 , Article)This research focus onto batch adsorption of nickel ions (Ni(II)) onto husk of Oryza sativa (HOS) from aqueous solution at room temperature. Several techniques such as Fourier transform infrared, scanning electron microscopy ... -
Kinetic, equilibrium, and thermodynamic studies for adsorptive removal of cobalt ions by rice husk from aqueous solution
( Desalination Publications , 2020 , Article)Herein, batch adsorptive removal of cobalt ions (Co(II)) from aqueous solution was studied at room temperature. Adsorption of cobalt ions onto rice husk (RH) was confirmed by utilizing Fourier transform infrared, scanning ... -
Kinetics and mechanism of H2O2 decomposition by Cu(II)-, Co(II)-, and Fe(III)-Amine complexes on the surface of Silica-Alumina (25% Al2O3)
( John Wiley & Sons, Inc. , 1994 , Article)The kinetics of the H2O2 decomposition by Cu(II)-, Co(II)-, and Fe(III)-amine complexes supported on the surface of silica-alumina (25% Al2O3) catalyst have been investigated. The decomposition process proceeded with ...
