Hypersonic aircraft represent an important area of aerospace development.Raising the aircraft lift-to-drag ratio, improving the efficiency of attitude control, and optimizing aerodynamic performance are important goals.Active flow control technology can improve the aerodynamic performance of the aircraft while optimizing its control attitude.In the
Abstract COVID-19 pandemic represented a worldwide major challenge in different areas, and efforts undertaken by the scientific community led to the understanding of some of the genetic determinants that influence the different COVID-19 outcomes.In this paper, we review the studies about the role of human genetics in COVID-19 severity and how Brazi
In this work, we explore how locally led innovations can advance sustainable energy access in low-income regions of Africa.Given the emphasis of the Sustainable Development Goals on the importance of affordable, reliable, and sustainable energy, we critically assess how local innovations can address the unique rectangular barn quilt patterns challe
In the field of energy production, cogeneration systems based on micro gas turbine cycles appear particularly suitable to reach the goals of improving efficiency and reducing pollutants.Moderate and Intense Low-Oxygen Dilution (MILD) combustion represents a promising technology to increase efficiency and to further reduce the emissions of those sys
Understanding the WOB and the law of tubular buckling is significant to handle workover operation bar drain board efficiently and safely.Based on the simulation theory and the characteristics of workover string dynamics,a finite element model is established for the workover string.Then,the tubular in the wellbore is simulated by the model,and the s