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Performance analysis of a small-scale Orthopter-type Vertical Axis Wind Turbine
منشور في 2018"…Wind tunnel experiments were carried out to measure the torque of two-, three, and four-bladed turbine, each at a set of different wind speeds and blade aspect ratios. Increasing solidity was achieved by either decreasing the blade aspect ratio or increasing the number of blades, both resulting in a higher peak power coefficient (Cp,max) of the VAWT. …"
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162
Quantitative Compressibility Effects in Thermal Elastohydrodynamic Circular Contacts
منشور في 2015"…The results reconfirm the well-known observations that minimum film thickness is very little affected by lubricant compressibility while central film thickness decreases linearly with the increase in volume compression of the lubricant. …"
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Effects of natural organic matter on aggregation kinetics of boron nanoparticles in monovalent and divalent electrolytes
منشور في 2010"…However, the attachment efficiency kept increasing in the presence of CaCl2 and alginate with the increase in the electrolyte concentration and was greater than unity at >4 mM CaCl2. The destabilization was attributed to bridging of the nanoparticles by the alginate–Ca2+ system. …"
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Optimum sizing of steam turbines for concentrated solar power plants
منشور في 2012"…Finally, although the cost of electricity of a CSP plant with capacities greater than 1MWe is significantly reduced to less than 1US$/kWh, currently such technology can only become economically viable through supporting schemes.…"
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The impact of green supply chain management practices on environmental performance during COVID-19 period: the case of discretionary companies in the G-20 countries
منشور في 2022"…It highlights the impact of green initiatives to cope with major disruptions and decrease pollution and environmental disaster.…"
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Influence of temperature on tire-pavement noise in hot climates: Qatar case
منشور في 2021"…However, no clear dependence on the temperature coefficient on the vehicle’s speed is observed in this study.…"
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Teachers’ Job Satisfaction in Instructional Delivery Modalities, and the Role of School Leaders: a Study among Selected Private Schools in Abu Dhabi.
منشور في 2022"…For example, the interviews recommended that school leaders are invited to build an active channel of communication with their teachers, share the decision-making process with them, decrease the workload, raise the teachers’ autonomy, and establish a remuneration system.…"
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Assessment of High-resolution Local Emissions and Land-use in Air Quality Forecasting at an Urban, Coastal, Desert Environment
منشور في 2022"…The model’s forecast accuracy was assessed against measurement data from five ground air quality monitoring stations in the greater metropolitan area of Doha over a one-month period. …"
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The Effects of Online Formative and Summative Assessment on Test Anxiety and Performance: A Study Among First-Year Undergraduate Students at A Higher Education Institution in Abu D...
منشور في 2019"…The presented study was conducted to provide greater insight into the potential positive, neutral and/or negative effects of online formative and summative assessment on test anxiety and performance. …"
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