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Design and analysis of PV fed high-voltage gain DC-DC converter using PI and NN controllers
منشور في 2022"…Here, 48 V is doubled to 400 V. By modifying the converter's parameters, its behavior is evaluated. …"
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Effect of carbon nanotubes on the bonding mechanism of non-corrosive reinforcements to concrete
منشور في 2024"…This study aimed to assess the impact of waterborne pre-dispersed multiwall carbon nanotubes (MWCNTs) at a concentration of 0.2 wt % on the bond strength between concrete and non-corrosive reinforcements, including stainless steel (SS), glass fiber reinforced polymers (GFRP), and basalt fiber reinforced polymers (BFRP) bars. …"
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Heart Rate Variability Analysis Reveals a Non-monotonic Relationship between Humanin Concentration and Cardiac Autonomic Regulation
منشور في 2022"…Significant differences included various frequency domain and nonlinear HRV parameters, particularly between first and fourth HN quintiles with p values < 0.001 for recurrence plot analysis (RPA), detrended fluctuation analysis (DFA) a1 and Poincaré plot ratio SD1/SD2. The results revealed non-monotonic relationships between measures of HRV and HN concentration. …"
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Non-linear relationship between real commodity price volatility and real effective exchange rate: The case of commodity-exporting countries
منشور في 2019"…Our results highlight that the relationship between real commodity price volatility and REER is non-linear and depends on the degree of financialization of the commodity market. …"
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Serum 25-hydroxyvitamin D concentrations are inversely associated with body adiposity measurements but the association with bone mass is non-linear in postmenopausal women
منشور في 2021"…Vitamin D deficiency has been linked to increased adiposity and decreased bone density. It is not known if vitamin D is linked to adiposity measures and bone mass in postmenopausal Qatar women. …"
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High flow nasal oxygen (HFNO) in the treatment of COVID-19 infection of adult patients from – An emergency perspective: A systematic review and meta-analysis
منشور في 2023"…HFNO was associated with a significant decrease in mortality and intubation rates (0.28 (95% CI; 0.19, 0.39) and 0.28 (95% CI; 0.18, 0.41), respectively). …"
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Dispatchable capacity optimization strategy for battery swapping and charging station aggregators to participate in grid operations
منشور في 2023"…Extensive simulations and numerical results show that the BSCS aggregator with demand-side regulation capacity can increase its income by 59.05% and 36.78% on working and non-working days, respectively. Also, the aggregator does not worsen the original power load while meeting the EV swapping demand and can decrease the daily load fluctuations by 0.65% and 12.89%, reduce the peak–valley difference by 5.81% and 7.80%, and increase the load rate by 3.67% and 4.08% in working and non-working day situations through providing the dynamic dispatchable capacity for the grid.…"
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Investigating the impact of remittance outflows and oil price on economic growth in Gulf Cooperation Council countries
منشور في 2023"…The results indicate that non-oil real GDP exhibits an adverse and magnified response to an increase in remittance outflows, relative to a decrease. …"
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Influenza prevalence and vaccine efficacy among diabetic patients in Qatar
منشور في 2023"…Among the typed IVA-positive cases, 33.4% were H1N1, and 7.7% were H3N2. A significant decrease in influenza infections was reported in vaccinated DM patients (14.5%) when compared to non-vaccinated patients (18.9%) (p-value = 0.006). …"
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An Improved Genghis Khan Optimizer based on Enhanced Solution Quality Strategy for Global Optimization and Feature Selection Problems
منشور في 2024"…Furthermore, Wilcoxon and Friedman's non-parametric tests were accomplished to support the performance of the proposed method.…"
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Extraction and characterization of biofunctional lignocellulosic fibers from Pulicaria undulata plant and the effect of alkali treatment on their bio-physicochemical properties
منشور في 2024"…However, the alkali treatment removed 75.7 % of hemicellulose and 50.6 % of lignin from the raw fiber sample and also increased its crystallinity and hydrophobicity. …"
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Regional variations in incidence of surgical site infection and associated risk factors in women undergoing cesarean section: A systematic review and Meta-Analysis
منشور في 2025"…The SSI incidence in LMICs was 8.0 % (95 % CI: 6.0 %–10.0 %) with moderate certainty, while the incidence in HICs was 5.0 % (95 % CI: 4.0 %–7.0 %) with low certainty. …"
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Excess pCO2 and carbonate system geochemistry in surface seawater of the exclusive economic zone of Qatar (Arabian Gulf)
منشور في 2022"…Its values in the Gulf ranged from −50 to −310 μmol kg−1 implying CaCO3 precipitation. …"
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Dynamics of Neisseria gonorrhoeae transmission among female sex workers and clients: A mathematical modeling study
منشور في 2024"…Increasing asymptomatic treatment coverage among FSWs from 0 % to 50 % decreases prevalence from 8.2 % to 0.4 %, 0.6 % to 0.1 %, and 0.2 % to 0.0 %, respectively, with very low prevalence when coverage exceeds 50 %. …"
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Novel thiazolones for the simultaneous modulation of PPARγ, COX-2 and 15-LOX to address metabolic disease-associated portal inflammation
منشور في 2025"…Notable COX-2 inhibitory activities (IC50 = 0.065–0.24 μM) were observed relative to celecoxib (IC50 = 0.049 μM). …"
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Global, regional, and national burden of upper respiratory infections and otitis media, 1990–2021: a systematic analysis from the Global Burden of Disease Study 2021
منشور في 2024"…The global all-age incidence rate of URIs decreased by 10·1% (–12·0 to –8·1) from 1990 to 2019. …"
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