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السجلات المعروضة 4327 -- 4346 من 50558
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Caffeine for the Treatment of Apnea in the Neonatal Intensive Care Unit: A Systematic Overview of Meta-Analyses
( Springer , 2020 , Article Review)Background: Caffeine is a common treatment for neonatal intensive care management of the developmental complication of apnea of prematurity in preterm infants. There are several systematic reviews (SRs) on the performance ... -
Caffeine Supplementation as an Ergogenic Aid for Muscular Strength and Endurance: A Recommendation for Coaches and Athletes
( SciTechnol , 2016 , Article)Caffeine (1, 3, 7-trimethylxanthine) which can be ubiquitously found in energy drinks, sodas, coffee, and supplements, is one of the principal legal drugs consumed worldwide. Caffeine based ergogenic aids are utilized ... -
Caffeine use or napping to enhance repeated sprint performance after partial sleep deprivation: Why not both?
( Human Kinetics Publishers Inc. , 2021 , Article)Purpose: To compare the effect of a 20-minute nap opportunity (N20), a moderate dose of caffeine (CAF; 5 mg·kg-1), or a moderate dose of caffeine before N20 (CAF+N) as possible countermeasures to the decreased performance ... -
Calcareous Nannoplankton From The Turonian-Maastrichtian Sequence East Of El Qusaima, Ne Sinai, Egypt
( Qatar University , 1992 , Article)On terms of calcareous nannoplankton, the Turonian-Maastrichtian sequence in the studied area is subdivided into a number of nannoplankton zones. The recorded biozones represent the Turonian, Coniacian, Campanian and ... -
Calcined hydrotalcites of varying Mg/Al ratios supported Rh catalysts: highly active mesoporous and stable catalysts toward catalytic partial oxidation of methane
( Springer Nature , 2021 , Article)Catalytic partial oxidation of methane to produce syngas were studied over calcined hydrotalcites of varying Mg/Al ratios supported Rh catalysts. Hydrotalcites of varying Mg/Al ratios were prepared using their hydroxide ... -
Calcite Scale Inhibition Using Environmental-Friendly Amino Acid Inhibitors: DFT Investigation
( American Chemical Society , 2021 , Article)Scale prevention is a long-term challenge. It is essential for ensuring the optimum utilization of oil and gas wells and minimizing economic losses due to disruptions in the hydrocarbon flow. Among the commonly precipitated ... -
Calcium Carbonate Content, Some Chemical And Physical Properties Of The Sudan Gezira Soils And Their Implications
( Qatar University , 1991 , Article)Eight soil pcdons representing a range of aridisols, vertisols and recent alluvium were studied for various chemical and physical properties. Generally the soils were clayey except the recent alluvium which was loamy but ... -
Calcium carbonate particles loaded with triethanolamine and polyethylenimine for enhanced corrosion protection of epoxy coated steel
( Elsevier Ltd , 2020 , Article)Calcium carbonate particles were synthesized and loaded with a mixture of two corrosion inhibitors, triethanolamine (TEA) and polyethylenimine (PEI). These particles can serve as pH-sensitive additives in epoxy coatings ... -
Calcium deficiency in hydroxyapatite and its drug delivery applications
( Institution of Engineering and Technology , 2018 , Article)In this work, calcium deficient hydroxyapatites (HAPs) [Ca 10 ? x (PO 4 ) 6 (OH) 2 ] [where x = 0 ? 0.3] were synthesised by precipitation method and calcined samples were characterised by Fourier transformation infrared ... -
Calcium Nitrite Effect On Setting Of Cement At Various Temperatures
( Qatar University , 2000 , Article)Calcium Nitrite, which is used as corrosion inhibitor, accelerates stiffening rates of cement. This paper deals with the effect of calcium nitrate on setting times of cement pastes at various curing temperatures. Four ... -
Calculating the response of waveguides to base excitation using the wave and finite element method
( SAGE , 2021 , Article)The prediction of the response of waveguides to time-harmonic base excitations has many applications in mechanical, aerospace and civil engineering. The response to base excitations can be obtained analytically for simple ... -
Calculating the Velocity of Sound in Real Pure Component Gases and Mixtures of Real Gases
( Qatar University , 1989 , Article) -
Calculation of derating factors based on steady-state unbalanced multiphase induction machine model under open phase(s) and optimal winding currents
( Elsevier , 2014 , Article)Multiphase machines have become a promising candidate in high-power applications as they offer many advantages over their three-phase counterparts. The main salient feature is the high fault tolerance capability. During ... -
Calculation Of Mass Yield Distributions In Fission Induced By High Energy Protons
( Qatar University , 1991 , Article)An analytical expression is obtained for the mass-yield distribution in fission induced by high-energy protons, using a two-step model. In the first step, the incident proton penetrates the target nucleus, knocking out ... -
Calibration & Temperature Controlled Setup for Air Quality Sensors
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Indoor air pollution is a major issue affecting public health. Due to hot climate, humidity and lack of natural green spaces, life is mostly confined indoors in many countries of the MENA region. Vulnerable population, ... -
Calibration of the double Heston model and an analytical formula in pricing American put option
( Elsevier B.V. , 2021 , Article)This paper proposes a novel approach to pricing of American put option under double Heston model. We develop an analytical solution to the double Heston partial differential equation (double Heston PDE) using the equivalent ... -
Calibration of time features and frequency features in the time-frequency domain for improved detection and classification of seizure in newborn EEG signals
( IEEE Computer Society , 2012 , Conference Paper)This paper presents new time-frequency features for seizure detection in newborn EEG signals. These features are obtained by calibrating relevant time features and frequency features in the joint time-frequency domain. The ...
