يعرض 381 - 400 نتائج من 898 نتيجة بحث عن '(( 6 points decrease ) OR ( 5 ((((steel decrease) OR (mean decrease))) OR (a decrease)) ))', وقت الاستعلام: 0.16s تنقيح النتائج
  1. 381
  2. 382

    Inter-annual variability and distribution of aerosols during winters and aerosol optical thickness over Northeastern Pakistan حسب Shahid, M. Z.

    منشور في 2020
    "…ir pollution during winters over north-eastern (NE) Pakistan (71–74.5 E, 28–34 N) is a major challenge that affects human health, climate and daily life. …"
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  3. 383

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

    منشور في 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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  4. 384
  5. 385

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

    منشور في 2019
    "…Various contents of the encapsulated TiO2 nanotubes (1, 3 and 5 wt%) were thoroughly dispersed into the epoxy matrix and the resulting composites were then applied on a cleaned steel substrate using doctor blade technique to develop smart coatings. …"
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  6. 386

    Recycled Concrete Used in Subbase in Potential Use for Road Base and Cement Bounded Material (CBM) حسب Ahmad, Hassan Haidar

    منشور في 2020
    "…This paper will focus on the fine recycled concrete (FRC) 0-5 mm as a fine aggregate material in the mix design for constructing the base road layers under the Asphalt layers and how using crushed concrete can increase the quality and change the classification of the base aggregate mixes. …"
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  7. 387

    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.

    منشور في 2022
    "…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). The data for 2020/21 showed a 35.1% and 29.2% decrease in depression and anxiety symptoms scores compared to pre-pandemic years (2017/2018) after adjusting for sociodemographic factors. …"
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  8. 388

    Computational approach to unravel the impact of missense mutations of proteins (D2HGDH and IDH2) causing D-2-hydroxyglutaric aciduria 2. حسب Thirumal Kumar, D

    منشور في 2018
    "…In the case of D2HGDH protein, the mutations I147S and V444A that are positioned in the beta sheet region exhibited higher Root Mean Square Deviation (RMSD), decrease in compactness and number of intramolecular hydrogen bonds compared to the mutations N439D and D375Y that are positioned in the turn and loop region, respectively. …"
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  9. 389

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

    منشور في 2022
    "…Diaz found that the performance of the bivariate model deteriorates when between-study heterogeneity increases and the number of studies decrease.5 Our simulation studies found similar results—with moderate levels of heterogeneity (tau2 = 1), the coverage probabilities of Se, Sp, and the diagnostic odds ratio (DOR) with the bivariate model dropped below the nominal level.6 Diagnostic accuracy studies usually favor sensitivity over specificity, or vice versa leading to diagnostic 2 × 2 tables with one or more of the cells with low frequency or zero counts. …"
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  10. 390

    Forecast of the outbreak of COVID-19 using artificial neural network: Case study Qatar, Spain, and Italy حسب Shawaqfah M.

    منشور في 2021
    "…The model sensitivity was analyzed using the root mean square error (RMSE), the mean absolute percentage error and the regression coefficient index R2, which yielded highly accurate values of the predicted correlation for the infected and dead cases of 0.99 for the dates considered. …"
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  11. 391

    The Structure of the Free Volume in Poly(styrene-co-acrylonitrile) from Positron Lifetime and Pressure Volume Temperature (PVT) Experiments حسب Dlubek, Gunter

    منشور في 2004
    "…The mean hole volume, vh, varies in PS between 105 Å3 (27 °C) and 220 Å3 (190 °C), and shows a systematic decrease with increasing AN content, at Tg from 121 Å3 for PS to 102 (±2) Å3 for SAN50. …"
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  12. 392
  13. 393
  14. 394

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

    منشور في 1995
    "…Doped sample Tann = 200- 500 C for time t mn = 45 subjected to subsequent thermal annealing (at the temperature and to plused leacr annealing (en<5rgy density in a min) pluse E=5.2 - 9.5 J/cm2) in order to establish optimal condition. …"
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  15. 395

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

    منشور في 2020
    "…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). …"
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  16. 396
  17. 397

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

    منشور في 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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  18. 398

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

    منشور في 2022
    "…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. …"
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  19. 399

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

    منشور في 2020
    "…EIS measurements revealed the decent corrosion inhibition efficiency of these inhibitors in order of DDA>NMTU. As a result, they are a favorable solution for longer endurance of coated piping steel and decreased operation expense contributing to economic saves, materials reliability and safety…"
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  20. 400

    Molecular dynamics of CH4/CO2 on calcite for enhancing gas recovery حسب Carchini, Giuliano

    منشور في 2022
    "…These results highlight how the CO2 geometry of adsorption is well defined and characterized by strong interaction, while methane adsorption is quite loose and depicts a very dynamic picture. Focusing on the effect of pressure, RDF peaks intensities increase, although this effect is limited to the 1-5 MPa range. …"
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