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Integrated planning of spare parts and service engineers with partial backlogging
منشور في 2017"…Moreover, approximation errors decrease as problems get larger. Furthermore, we test how the greedy optimization heuristic performs compared to other discrete search algorithms in terms of total costs and computation times. …"
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Development of value-added polyethylene grades with extended service lifetime: Weathering resistant flame retarded materials for outdoor applications
منشور في 2021"…Two low-density (LDPE) and one linear low-density (LLDPE) polyethylene grades were modified via melt compounding with an additive system comprising: (a) a nitrogen-phosphorous intumescent system for flame retardance and (b) a hindered amine light stabilizer and a benzophenone-type UV absorber for UV/heat stabilization, at a total loading of 30-35 wt%. …"
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Flow and heat transfer analysis of Jeffery nano fluid impinging obliquely over a stretched plate
منشور في 2017"…The governing nonlinear partial differential equations for the flow field are obtained and then converted to ordinary differential equations via suitable transformations. Consequential highly non-linear system of differential equations is solved numerically through mid-point integration as a basic scheme along with Richardson's extrapolation as an enhancement scheme and analytical results are also obtained using optimal homotopy analysis Method (OHAM). …"
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THE ASSOCIATION BETWEEN SOFT DRINK CONSUMPTION AND BONE MINERAL DENSITY AMONG QATARI WOMEN: ANALYSIS OF QATAR BIOBANK DATA
منشور في 2019"…It is common in older women, as the bone mineral density (BMD) tends to decrease with age, particularly after menopause. Decrease in BMD increases the risk of osteopenia and osteoporosis. …"
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Enhancing the production of biogas through anaerobic co-digestion of agricultural waste and chemical pre-treatments
منشور في 2020"…Further improvement was achieved via alkalinity treatment with 1.0 g of NaHCO3/gVS leading to decrease in lignin, cellulose, and hemicellulose contents of feedstock by 3.5%, 10.5% and 15.9%, respectively, converting them to soluble fractions and improving the CMP by 11.2–29.7% based on substrate quality. …"
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Superior photocatalytic activity of Cu doped NiWO4 for efficient degradation of benzene in air even under visible radiation
منشور في 2019"…The maximum benzene removal efficiency and its mineralization via visible light photocatalysis of the 3Cu-NiWO4 were 93.7 and 96.5%, respectively. …"
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Qatar University culture collection: A source of biodiversity and numerous applications
منشور في 2016"…Microalgal lipids can be converted to biodiesel via process called transesterification. The use of biodiesel will decrease the emission of harmful gases, which can help in reducing the greenhouse effects and global warming. …"
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Anaerobic and aerobic contributions to repeated supramaximal cycling exercises and their adaptation to high-intensity interval training in obese perimenopausal and postmenopausal w...
منشور في 2024"…However, a higher decrease was reported for postmenopausal women at the fourth and fifth repetitions (P < 0.01, respectively). …"
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Electrocatalytic arsenite oxidation in bicarbonate solutions combined with CO2 reduction to formate
منشور في 2020"…The Bi electrodes synthesized via the electrodeposition of Bi3+ typically show high FEs of >80 % for formate production in bicarbonate solution purged with CO2. …"
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Calmodulin Mutations Associated with Congenital Cardiac Disease Display Novel Biophysical and Biochemical Characteristics
منشور في 2018"…Calmodulin (CaM) is a cytoplasmic multifunctional calcium (Ca2+)-binding messenger that interacts with the cardiac ryanodine receptor (RyR2), a large transmembrane Ca2+ channel that mediates Ca2+ release from the sarcoplasmic reticulum (SR) to activate cardiac muscle contraction. …"
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Impact of magnetic dipole on a thermally stratified ferrofluid past a stretchable surface
منشور في 2019"…This article focuses on the characteristics of a magnetic dipole in a viscous ferrofluid induced by linear stretched surface. The analysis is disclosed by thermally stratified phenomenon and stagnation point. …"
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Theoretical insight into effect of cation–anion pairs on CO2 reduction on bismuth electrocatalysts
منشور في 2020"…The adsorption energy (Eads) and work function (Wf) of the anions increases with decreasing anion size (i.e., Cl− > Br− > I−). On the other hand, the larger the cation size is, the higher is the Eads (i.e., Li+ < K+ < Cs+) but the lower is the Wf (i.e., Cs+ < K+ < Li+). …"
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Simulation and experimental study of underwater dissimilar friction-stir welding between aluminium and steel
منشور في 2020"…Tem-perature profile, materials flow, and intermixing during dissimilar bonding under the coolingmedium were monitored via VOF modeling and verified according to experimental data. …"
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Qatar Culture Collection of Microalgae: A Sustainable Source for Biodiesel Production and Omega Fatty Acid Compounds
منشور في 2016"…Microalgal lipids can be converted to biodiesel via process called transesterification. The use of biodiesel will decrease the emission of harmful gases, which can help in reducing the greenhouse effects and global warming. …"
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A Modular Multilevel Voltage-Boosting Marx Pulse-Waveform Generator for Electroporation Applications
منشور في 2019"…After the first pulse delivery, the energy of the SM capacitors decreases due to the generated pulse. Then, for continuous operation without fully discharging the SM capacitors or having a large voltage droop as in the available Marx generators, the SM capacitors are continuously recharged in parallel, to the desired boosted voltage level. …"
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Phospholipase C zeta profiles are indicative of optimal sperm parameters and fertilisation success in patients undergoing fertility treatment.
منشور في 2020"…Further focused investigations are required with larger cohorts to examine the full clinical potential of PLCζ.…"
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Graph-Guided Regularized Regression of Pacific Ocean Climate Variables to Increase Predictive Skill of Southwestern U.S. Winter Precipitation
منشور في 2021"…We use large ensemble simulations from a climate model to construct this regularizer, reducing the structural uncertainty in the estimation. …"
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