يعرض 561 - 580 نتائج من 718 نتيجة بحث عن '(( 50 ((((meters decrease) OR (a decrease))) OR (nn decrease)) ) OR ( a d decrease ))', وقت الاستعلام: 0.17s تنقيح النتائج
  1. 561
  2. 562

    The effects of attendance and high school GPA on student performance in first-year undergraduate courses حسب Al Hazaa, Khalifa

    منشور في 2021
    "…The study uses census data and records of 969 undergraduate students at Qatar University to investigate the impact of HSGPA, attendance, and socio-demographic factors on academic performance in higher education in DFW courses (grades D, F, or withdrawal). Findings indicate that increased attendance decreases the likelihood of getting DFW, and there was a strong negative relationship between high-school performance and the probability of getting DFW. …"
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  3. 563
  4. 564
  5. 565

    Soluble ACE2 and Angiotensin II levels Modulated in Hypertensive COVID-19 Patients treated with different Antihypertension Drugs حسب Yalcin, Huseyin C.

    منشور في 2021
    "…ACE2 levels correlated positively with the length of hospital stay (r=0.3, p=0.003), while angiotensin II levels decreased with disease severity (p=0.04). Higher ACE2 levels were associated with elevated CRP and D-dimer, while higher angiotensin II levels were associated with lower levels of CRP, D-dimer, and troponin. …"
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  6. 566
  7. 567
  8. 568
  9. 569

    Synthesis of silica supported ni and cu catalyst for carbon dioxide methanation reaction حسب Aheed, Ahmed

    منشور في 2019
    "…The activity and product selectivity and stability for methanation reaction on Ni/SiO2 and Cu/SiO2 catalysts have been evaluated using a flow reactor between 50ºC - 650ºC. The as-synthesized catalysts were characterized using XRD, SEM, TEM to understand the structural properties. …"
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  10. 570
  11. 571
  12. 572

    Fluid-Structure-Acoustic coupling analysis for external laminar and turbulent fluid flows حسب Tohid, Adibi

    منشور في 2023
    "…The results indicate that the transmission loss is 27% more at the elastic plate’s highest position. By decreasing the length of the elastic plate by 50%, the mean transmission loss is reduced by 9%. …"
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    article
  13. 573
  14. 574
  15. 575
  16. 576

    Long-term performance analysis and power prediction of PV technology in the State of Qatar حسب Touati F.

    منشور في 2017
    "…Results show that due to panel dusting for eight months, the PV output power decreased by 50%. Also, owing to lower ambient temperatures, clearer sky and cleaner panels due to occasional rainfall, the PV panels show higher output power in Winter than in Summer season. …"
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  17. 577

    Development of an Air-Cooled Induction Manifold for Diesel Engines in Hot and Humid Climate حسب Elrentisy, Mohamed H.

    منشور في 2022
    "…For the emissions, there was a considerable reduction rate in NOx emissions with about 83% at 20 °C as well as a 50% reduction in hydrocarbon (HC) emissions compared with 45 °C. …"
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  18. 578

    Algal-algal bioflocculation enhances the recovery efficiency of Picochlorum sp. QUCCCM130 with low auto-settling capacity حسب Saadaoui, I.

    منشور في 2023
    "…QUCCCM31 and Tetraselmis sp. QUCCCM50 presenting a cell size of ∼2 μm, ∼5 μm, and ∼15 μm, respectively, were selected to be subjected to the harvesting optimisation experiments. …"
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  19. 579

    Selective adsorption of carbon dioxide, methane and nitrogen using resorcinol-formaldehyde-xerogel activated carbon حسب Awadallah, Ahmed

    منشور في 2017
    "…Adsorption/desorption isotherms of CO2, CH4, and N2 gases onto RF-ACX adsorbent were measured gravimetrically by a magnetic suspension microbalance at five different temperatures (20, 30, 40, 50 and 60 °C) in the pressure range of 0–1 MPa. …"
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  20. 580