High temperature thermal stability of innovative nanostructured thin coatings for advanced tooling حسب Cabibbo, Marcello

"…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. …"
احصل على النص الكامل
احصل على النص الكامل

Shear Behavior of Green Concrete Beams Reinforced with Basalt FRP Bars and Stirrups. حسب Elahtem, Ayman Ahmed

"…The parameters investigated in this study are span to depth ratio (i.e. a/d =2.5 and 3.5), reinforcement ratio , stirrups spacing effect (i.e. 250 mm and 350 mm) and stirrups type (Steel and Basalt). …"
احصل على النص الكامل

Mechanical and microstructure characterization of hard nanostructured N-bearing thin coating حسب Cabibbo, M.

"…The main problem with steel, is that it exhibits a relatively low hardness (below 10GPa) which strongly decreases upon annealing above about 600K. …"
احصل على النص الكامل

Effect of concentration of DOC loaded TiO 2 nanotubes on the corrosion behavior of smart coatings حسب Ubaid F.

"…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. …"
احصل على النص الكامل
احصل على النص الكامل

Experimental and numerical investigation of the flexural behavior of one-way RC slabs strengthened with near-surface mounted and externally bonded systems حسب Aljidda, Omar

"…In contrast, the slabs reinforced with EB experienced a decrease in ductility ranging from 38 % to 50 %. …"
احصل على النص الكامل
احصل على النص الكامل

Overconfident results with the bivariate random effects model for meta-analysis of diagnostic accuracy studies حسب Furuya-Kanamori, Luis

"…In 2001, Rutter and Gatsonis proposed the hierarchical summary receiver operating characteristic (HSROC) model,1 and in 2004 Macaskill described an empirical Bayes approach.2 Soon after, in 2005, Reitsma et al. proposed the bivariate random effects model,3 which has been widely adopted and is the most commonly used method for diagnostic meta-analysis.4 However, as pointed out by Diaz,5 the statistical performance of the bivariate model has not been scrutinized. …"
احصل على النص الكامل
احصل على النص الكامل
احصل على النص الكامل

Analysis of dopant diffusion in molten germanium induced by pulsed nd : yag laser حسب Mousa, Ali M. [علي مطشر موسى]

"…A monotonic decrease in the sheet rcsostance with increasing energy density for all values of E > 10 J/cm2. …"
احصل على النص الكامل

Correlation between delta-endotoxin and proteolytic activities produced by Bacillus thuringiensis var. kurstaki growing in an economic production medium حسب Ennouri, Karim

"…Maximal protease activity (540-2468 UI) obtained by BUPM5-1 and BUPM5-2 was 2.34-fold and 10.7-fold, respectively, more than that obtained by the wild strain BUPM5 with a drastic decrease of their delta-endotoxin production. …"
احصل على النص الكامل
احصل على النص الكامل

Trends in prevalence of depression and anxiety symptoms and effects of sociodemographic variables before and after the first wave of COVID-19 in Qatar حسب Khaled, Salma M.

"…The two-week prevalence of anxiety symptoms (≥10 on the GAD-7) was 3.6% in 2018 and 5.1% in 2020/2021 (p = 0.062). …"
احصل على النص الكامل
احصل على النص الكامل

Association between Insulin and Nitric Oxide in Human Retinal Microvascular Endothelial Cells in vitro حسب Rizk, Nasser Moustafa

"…This study demonstrated that hyperglycemia causes an increase in ROS/oxidative stress and apoptosis, while insulin promotes a significant decrease in ROS and apoptosis. eNOS mediated NO production increases with hyperglycemia but remarkably decreases with insulin treatment after 1 hour, 2 hours and 4 hours. …"
احصل على النص الكامل
احصل على النص الكامل

Corporate governance and cost of debt financing: Empirical evidence from Canada حسب Ghouma, Hatem

احصل على النص الكامل
احصل على النص الكامل

Self-healing performance of smart coatings modified with different corrosion inhibitors. حسب Habib, Sehrish

احصل على النص الكامل
احصل على النص الكامل

Structural performance and moment redistribution of basalt FRC continuous beams reinforced with basalt FRP bars حسب Abushanab, Abdelrahman

"…This study investigated the structural performance and moment redistribution of basalt fiber reinforced concrete (BFRC) continuous beams reinforced with basalt fiber reinforced polymers (BFRP) bars. A total of 10 reinforced concrete (RC) continuous beams over two equal spans of 1800 mm were tested under five-point loading until failure. …"
احصل على النص الكامل
احصل على النص الكامل

Utilization of Emergency Services by Children with Asthma in Qatar حسب Arafah, Dima

"…Respiratory diseases are the most common conditions seen in Pediatric Emergency Centers (PECs) in Qatar. 2 The five PECs are an essential point of healthcare access for severely sick children, however, many people utilize them for potentially preventable reasons. 3 Methods: This was a quantitative retrospective observational study of children with asthma utilizing the five PECs during 2019. …"
احصل على النص الكامل
احصل على النص الكامل

Glycine and Folate Ameliorate Models of Congenital Sideroblastic Anemia حسب Fernández-Murray1, J. Pedro

"…Based on these findings, we observed that high levels of exogenous glycine, or 5-aminolevulinic acid (5-Ala) a metabolite downstream of Hem25 in heme biosynthetic pathway, were able to restore heme levels to normal in yeast cells lacking Hem25 function. …"
احصل على النص الكامل
احصل على النص الكامل

Fatigue and Monotonic Behaviors of Corrosion-Damaged Reinforced Concrete Beams Strengthened with FRCM Composites حسب Elghazy M.

"…Test results showed that the corrosion of steel bars dramatically decreased the fatigue life of the beams. …"
احصل على النص الكامل
احصل على النص الكامل

Experimental results and modelling of corrosion-damaged concrete beams strengthened with externally-bonded composites حسب Elghazy M.

"…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). …"
احصل على النص الكامل
احصل على النص الكامل

Visitors off the trail: Impacts on the dominant plant, bryophyte and lichen species in alpine heath vegetation in sub-arctic Sweden حسب Monika, Rawat

احصل على النص الكامل
احصل على النص الكامل
احصل على النص الكامل

Visitors off the trail: Impacts on the dominant plant, bryophyte and lichen species in alpine heath vegetation in sub-arctic Sweden حسب Monika, Rawat

احصل على النص الكامل
احصل على النص الكامل
احصل على النص الكامل

Mobile Epifauna Associated To Artificial Substrates In Offshore Qatari Waters حسب Abdulaziz Aziz, Naeem

"…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). …"
احصل على النص الكامل