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Design and analysis of PV fed high-voltage gain DC-DC converter using PI and NN controllers
منشور في 2022"…To reuse the leakage-inductor (LI) energy of the CI with the help of a passive clamp circuit for reducing the voltage stress across the switch, similarly switch has less resistance so conduction losses also decreased. In this manner, the converter efficiency was improved and the diode recovery problem also solved. …"
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Follow up and comparative assessment of IgG, IgA, and neutralizing antibody responses to SARS-CoV-2 between mRNA-vaccinated naïve and unvaccinated naturally infected individuals ov...
منشور في 2023"…At the 7th month, there was a significant decline in antibody responses among VN individuals, but not NI individuals, with a minimum decrease of 3.7-fold (p < 0.001). Among VN individuals, anti-S1 IgA levels began to decrease significantly (1.4-fold; p = 0.007) after two months, and both NtAb and S-RBD IgG levels began to decline significantly (NtAb: 2.0-fold; p = 0.042, S-RBD IgG: 2.4-fold; p = 0.035) after three months. …"
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Follow up and comparative assessment of IgG, IgA, and neutralizing antibody responses to SARS-CoV-2 between mRNA-vaccinated naïve and unvaccinated naturally infected individuals ov...
منشور في 2023"…At the 7th month, there was a significant decline in antibody responses among VN individuals, but not NI individuals, with a minimum decrease of 3.7-fold (p < 0.001). Among VN individuals, anti-S1 IgA levels began to decrease significantly (1.4-fold; p = 0.007) after two months, and both NtAb and S-RBD IgG levels began to decline significantly (NtAb: 2.0-fold; p = 0.042, S-RBD IgG: 2.4-fold; p = 0.035) after three months. …"
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Structural and physical properties of the dust particles in Qatar and their influence on the PV panel performance
منشور في 2016"…However, even when these characteristics have been addressed appropriately, there are other factors that adversely affect the performance of PV systems, namely the temperature-induced voltage decrease leading to a PV power loss and the dust accumulation (soiling). …"
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Effect of speed and gradient on plantar force when running on an AlterG® treadmill
منشور في 2021"…Gradient made little difference except for a downhill grade of − 5% decreasing force peaks as compared to level or uphill running.…"
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Genetic Variation in CCL5 Signaling Genes and Triple Negative Breast Cancer: Susceptibility and Prognosis Implications
منشور في 2019"…In the TCGA TNBC/Basal-like cohort the <b><i>MAP3K21</i></b><b> </b><b>rs1294255-G</b> allele was associated with a decreased OVS. …"
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Performance of Monofacial and Bifacial Silicon Heterojunction Modules under Desert Conditions and the Impact of PV Soiling
منشور في 2023"…Moreover, the bifacial module was found to be less sensitive to the PV soiling than the monofacial module. The results showed that the frequency of module cleaning could be reduced for the bifacial module compared with the monofacial module, resulting in a remarkable decrease in the module cleaning cost and PV site Operation and Maintenance cost.…"
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Solar hydrogen production via thermochemical magnesium oxide – Magnesium sulfate water splitting cycle
منشور في 2020"…<p dir="ltr">This investigation reports the thermodynamic scrutiny of the MgO/MgSO<sub>4</sub> water-splitting cycle. At the initial stage, the thermal reduction temperature required for the commencement of the thermal dissociation of MgSO<sub>4</sub> (in the absence of inert Ar) and the maximum temperature below which the water-splitting reaction is feasible is identified by performing thermodynamic equilibrium calculations. …"
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Optimal Energy Dispatch Engine for PV-DG-ESS Hybrid Power Plants Considering Battery Degradation and Carbon Emissions
منشور في 2023"…To test the performance of the developed model, real-time load and photovoltaic (PV) data were used in conjunction with a PV-DG-ESS hybrid plant. …"
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Magnesium-reinforced PMMA composite scaffolds: Synthesis, characterization, and 3D printing <i>via</i> stereolithography
منشور في 2025"…Notably, pure PMMA exhibited the highest tensile strength, 26.23 ± 0.14 MPa and an elastic modulus of 707.81 MPa, while PMMA resin/1% Mg showed the lowest strength (19.46 ± 0.25 MPa) and modulus (392.88 MPa), indicating a decrease in mechanical integrity with higher Mg content. …"
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Determining the influencing factors in the residential rooftop solar photovoltaic systems adoption: Evidence from a survey in Qatar
منشور في 2022"…<p>Renewable energy sources have developed rapidly, decreased in cost, and proven to have the potential to limit global warming. …"
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Rooftop Photovoltaic Systems Adoption Using a Sequential Mixed Methods Approach in Qatar
منشور في 2024"…Rooftop and building-integrated photovoltaic (PV) systems are ideal for collecting solar energy. …"
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Prevalence and Phylogenetic Analysis of Parvovirus (B19V) among Blood Donors with Different Nationalities Residing in Qatar
منشور في 2021"…The objectives of this study were to estimate the seroprevalence (anti-B19V IgM and IgG), the viremia rate (B19V DNA), and the circulating genotypes of B19V among blood donors in Qatar. …"
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A new method for improving the solar photovoltaic unit efficiency through neem oil as coolant medium for high power applications—an experimental investigation
منشور في 2024"…Thus, the critical outcomes of the monocrystalline and polycrystalline PV panels are to decrease the panel temperature by 2.29% and 4.34%, respectively, and enhance the efficiency of the PV panels by 15.0% and 17.8%, respectively.…"
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Assessment of resin systems as solution for well integrity challenge in carbonate reservoirs
منشور في 2023"…Based on the performed experimental tests results, the optimal additive resin for a class G cement slurry is the microbond additive at a concentration of 7.5%. …"
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A pathway to 25% reduction in greenhouse gas emission by 2030 using GIS-Based multi-criteria decision making for renewables, date palm (phoenix dactylifera), and carbon credits: a...
منشور في 2024"…Also, while Qatar has the potential to meet 20% of its energy demand by 2030 from renewable sources by using solar PV and wind, this will only account for a 14.28% reduction in overall emissions. …"