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641
High temperature thermal stability of innovative nanostructured thin coatings for advanced tooling
Published 2014“…The main problem with steel, isthat itexhibits a relatively low hardness (below 10 GPa) which strongly decreases upon annealing above about 600 K.Thus, the majority of modern tools are nowadays coated with hard coatings that increase the hardness, decrease the coefficient of friction and protect the tools against oxidation. …”
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642
Mechanical and microstructure characterization of hard nanostructured N-bearing thin coating
Published 2015“…The main problem with steel, is that it exhibits a relatively low hardness (below 10GPa) which strongly decreases upon annealing above about 600K. …”
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643
Effect of concentration of DOC loaded TiO 2 nanotubes on the corrosion behavior of smart coatings
Published 2019“…Towards this direction, TiO2 nanotubes with an average size of ⁓10–15 nm (as confirmed by scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis) were synthesized through a hydrothermal process and were then impregnated with DOC. …”
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644
Experimental and numerical investigation of the flexural behavior of one-way RC slabs strengthened with near-surface mounted and externally bonded systems
Published 2024“…In contrast, the slabs reinforced with EB experienced a decrease in ductility ranging from 38 % to 50 %. …”
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645
Correlation of multiple time-scale and uncertainty modelling for renewable energy-load profiles in wind powered system
Published 2019“…It is demonstrated that 30, 15, and 5-min time-scale reduce the cost about 5, 3, and 0.8%, respectively. …”
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646
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647
Utilization of Emergency Services by Children with Asthma in Qatar
Published 2022“…Around 60% were boys aged 2 to 13 years, with the peak of utilization in October and November (Figure 1) and during the day between 2:00 PM to 10:00 PM. The majority were seen in less than 30 mins (93%) and stayed in the PEC for 2 hours or less (84%) (Figure 2). …”
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648
The influence of environmental and core temperature on cyclooxygenase and PGE2 in healthy humans
Published 2021“…Participants (n = 9) were exposed to three environments; cold (20 °C), thermoneutral (30 °C) and hot (40 °C) for 120 min. Core (Tc)/skin temperature and thermal perception were recorded every 15 min, with COX/PGE2 concentrations determined at baseline, 60 and 120 min. …”
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649
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650
The Separation of Emulsified Water/Oil Mixtures through Adsorption on Plasma-Treated Polyethylene Powder
Published 2021“…The fastest adsorption was observed during the first 30 min of treatment. The adsorption kinetics for emulsified oils onto sorbent followed a pseudo-second-order kinetic model.…”
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651
Mitigating Cardiotoxicity of Dendrimers: Angiotensin-(1-7) via Its Mas Receptor Ameliorates PAMAM-Induced Cardiac Dysfunction in the Isolated Mammalian Heart
Published 2022“…Thirty minutes of regional ischemia through ligation of the left anterior descending coronary artery was followed by 30 min of reperfusion. All treatments were initiated 5 min prior to reperfusion and maintained during the first 10 min of reperfusion. …”
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652
Energy recovery and nutrients recycling from municipal sewage sludge
Published 2020“…In this study, HTL process temperature (275–400 °C), and reaction time (30–120 min) were first investigated for biocrude yield and release of the nutrients to the aqueous phase liquid (APL) and biochar. …”
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653
Fatigue and Monotonic Behaviors of Corrosion-Damaged Reinforced Concrete Beams Strengthened with FRCM Composites
Published 2018“…Test results showed that the corrosion of steel bars dramatically decreased the fatigue life of the beams. …”
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654
Dynamic stretching alone can impair slower velocity isokinetic performance of young male handball players for at least 24 hours
Published 2019“…Tests included (i) two 4s maximal voluntary isometric contractions (MVC) at 60 of knee flexion with 2-min rest, (ii) two maximal isokinetic contractions each at 60/sec and 300/sec with 1-min rest, and (iii) two drop jumps with 30-sec rest. …”
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655
Experimental results and modelling of corrosion-damaged concrete beams strengthened with externally-bonded composites
Published 2018“…The investigated parameters included the corrosion levels (10 and 20% mass loss of steel reinforcement), the type of composite (fabric-reinforced cementitious matrix (FRCM) and fiber-reinforced polymers (FRP)), and the number of composite layers (one, two, and four). …”
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656
Structural performance and moment redistribution of basalt FRC continuous beams reinforced with basalt FRP bars
Published 2021“…Seven beams were longitudinally reinforced with BFRP bars, while the remaining three beams were reinforced with conventional steel bars and served as a control. Test results showed that BFRC-RC beams had higher crack widths, mid-span deflections, and strains than steel-RC beams. …”
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657
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659
Mobile Epifauna Associated To Artificial Substrates In Offshore Qatari Waters
Published 2019“…Thirty plates were deployed, at depths between 10 and 44 m, in each of six offshore sites, along a transect defined between natural and artificial reefs (i.e., oil platforms). …”
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660