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61
Experimental study of exhaust emissions and performance of a dual fuel IDI diesel engine
منشور في 1999"…The admission of more gaseous fuel with the intake air increased the engine power, thermal efficiency, and NOx emissions while CO and UHC emissions increased up to the flame initiation limit beyond which they decreased sharply. The experimental results showed higher engine powers and efficiencies, lower CO and UHC emissions, and unfortunately higher NOx emissions and narrower knock-free operating range with employing larger pilot fuel quantifies, advancing the pilot fuel injection timing, and increasing the intake temperature. …"
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62
A cephalometric morphometric study of age- and gender-dependent shape patterns of the sella turcica
منشور في 2018"…The main objective of this study is to build up a normative database of the shape of the sella turcica in the Jordanian population with reference to age and gender. …"
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63
Adult Hospital Inpatient Experience in Qatar And Associated Factors: A Cross-Sectional Study
منشور في 2020"…Multivariable multilevel linear regression methods were used to analyse the data. …"
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64
Textile-Reinforced Mortar (TRM) System as a Strengthening Technique on Reinforced Concrete Beams
منشور في 2016"…The RC beam specimens were tested in flexure under four point loading until failure with a clear span of 2.2 m. The strengthening technique was applied to the soffit of the beam (flat type) altering the number of layers of textile. …"
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65
A simplified methodology for renewable energy integration and harmonic current reduction in hybrid micro grid
منشور في 2021"…While incorporating the HMG in the proposed system, the control strategy decreases 90.3% and 89.4% of reactive power in both linear and non-linear loads. …"
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66
Tailoring optical absorption in silicon nanostructures from UV to visible light: A TDDFT study
منشور في 2016"…Our main findings are that: (i) The oscillator strength as a function of length is quadratic at small lengths, and then increases linearly. …"
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67
Flow and heat transfer analysis of Jeffery nano fluid impinging obliquely over a stretched plate
منشور في 2017"…Consequential highly non-linear system of differential equations is solved numerically through mid-point integration as a basic scheme along with Richardson's extrapolation as an enhancement scheme and analytical results are also obtained using optimal homotopy analysis Method (OHAM). …"
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68
Relationship between the heart rate and E/A ratio in athletic and non-athletic males in different ages
منشور في 2011"…Relationship between E/A and resting heart rate (HR), was determined by linear regression analysis. …"
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69
High-quality and anti-inflammatory diets and a healthy lifestyle are associated with lower sleep apnea risk
منشور في 2022"…There was a significant interaction between healthy lifestyle and sex with sleep apnea risk (P for interaction = .049) whereby females with higher healthy lifestyle scores had a lower risk of sleep apnea compared to males. …"
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70
Exchange counterion in polycationic hydrogels: Tunability of hydrophobicity, water state, and floating capability for a floating ph device
منشور في 2021"…The kinetics of the exchange showed that the fast exchange (within 4 h) of PFO allowed for a favorable coordination for ion pairing, resulting in a decrease in hydration. …"
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71
Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar
منشور في 2023"…In the post-first omicron phase, incidence rate of fatal COVID-19 decreased by 90.0% compared with earlier stages. Both severity and fatality exhibited an exponential increase with age and a linear increase with the number of coexisting conditions. …"
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72
Usefulness of In-Situ Synchrotron Study on Scale Formation during CO2 Corrosion of Mild Steel: A Review
منشور في 2016"…500 mV (vs SCE), together with the intensities of the Fe and FeCO3 signals from the in-situ synchrotron XRD [1]. There is a clear peak in the current transient, with the XRD results showing FeCO3 formation during the increasing portion of this transient and then a rapidly decreasing rate of FeCO3 formation as the anodic current decreases towards the end of the test, indicating the growth of a protective surface scale. …"
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73
Changes in dietary habits and eating behaviors during COVID-19 induced confinement: A study from Jordan
منشور في 2022"…Conversely, a larger (p < 0.05) proportion of participants reported increased consumption of high-calorie food and late-night eating, indicating a risky behavior for obesity and subsequent chronic complications. …"
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74
Association Between Serum Bicarbonate Levels and Prediabetes and Subclinical Inflammation in Young Healthy Adults: A Cross-sectional Study
منشور في 2023"…Similarly, after multivariable linear regression, a unit increase in serum bicarbonate was associated with a 0.18 unit decrease in MHR (beta −0.18, 95%CI: −0.29, −0.07, p=0.002), again with no association observed in females. …"
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75
Association between Lebanese Mediterranean Diet and Frailty in Community-Dwelling Lebanese Older Adults—A Preliminary Study
منشور في 2022"…The results showed that a higher LMD adherence was associated with a significantly decreased frailty prevalence (OR = 0.123, 95% CI: 0.022–0.676, p = 0.016 when categorical and OR = 0.773, 95% CI 0.608–0.983, p = 0.036). …"
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76
Environment Degradation and Economic Growth in the Qatar Economy: Evidence from a Markov Switching Equilibrium Correction Model
منشور في 2016"…After reaching a critical level of income, the spending on environment protection is increased, and hence environment degradation tend to decrease. …"
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77
Community structure and activity of a highly dynamic and nutrient-limited hypersaline microbial mat in Um Alhool Sabkha, Qatar
منشور في 2014"…We investigated the chemical composition, the microbial activity and biodiversity of the four main layers (L1-L4) in the photosynthetic mats. Chlorophyll a (Chl a) concentration and distribution (measured by HPLC and hyperspectral imaging, respectively), the phycocyanin distribution (scanned with hyperspectral imaging), oxygenic photosynthesis (determined by microsensor), and the abundance of photosynthetic microorganisms (from 16S and 18S rRNA sequencing) decreased with depth in the euphotic layer (L1). …"
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78
Exploring the quality of life of cosmetic users: A cross-sectional analysis from eight Arab countries in the Middle East
منشور في 2023"…The production of cosmetics has been largely driven by consumerism and a bid to keep abreast with the latest trends in the beauty industry with less attention on how the users' quality of life (QoL) is affected. …"
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79
Tranexamic Acid for Traumatic Injury in the Emergency Setting: A Systematic Review and Bias-Adjusted Meta-Analysis of Randomized Controlled Trials
منشور في 2024"…Previous reviews suggested potential TXA benefits but did not consider the latest trials. MethodsA systematic review and bias-adjusted meta-analysis were performed to assess TXA’s effectiveness in emergency traumatic injury settings by pooling estimates from randomized controlled trials. …"
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80
Cobalt phthalocyanine as a novel molecular recognition reagent for batch and flow injection potentiometric and spectrophotometric determination of anionic surfactants
منشور في 2008"…The spectrophotometric method is based on the use of [Co(II)Pc] solution in dimethylsulfoxide (DMSO) as a chromogenic reagent. The maximum absorption of the reagent at 658 nm linearly decreases with the increase of anionic surfactant over the concentration range 2–30 μg mL−1. …"
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