Physics‐Based Approach to Thermospheric Density Estimation Using CubeSat GPS Data by Shaylah M. Mutschler, Penina Axelrad, Eric K. Sutton, Dallas Masters

“…Abstract In Low Earth Orbit (LEO), atmospheric drag is the largest contributor to trajectory prediction error. …”
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Turbulent wind characteristics in typhoon Hagupit based on field measurements by Lixiao Li, Yiqing Xiao, Haijun Zhou, Feng Xing, Lili Song

“…The results show that drag coefficient increases with mean wind speeds at low levels and then decreases gradually at wind speed greater than 22.45 m/s in typhoon Hagupit over sea surface; turbulence intensities in front-side eyewall region are greater than those in back-side eyewall regions both in typhoons and hurricanes; the ratio between longitudinal integral scale and lateral integral scale, L u x : L v x , is scattered, but the ratio between longitudinal integral scale and vertical integral scale, L u x : L w x , is closer both in typhoons and hurricanes; the gust factor in typhoon Hagupit is 1.25 over open sea surface and 1.42 over open flat terrain; the peak factor is about 2.4.…”
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Aerodynamic Performance of Different Trailing-edge Serrations for High Reynolds Number Flows around Wing-flap System by S. Ahmadkhah, A. Jahangirian, A. Zarinvafa

“…All serrated models experience a reduction in drag coefficient compared to the baseline model at incidence angles before stall. …”
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Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation by Mahmoud Adel A., Ginting Bobby Minola, Uchida Tatsuhiko

“…The results show that rigid emergent vegetation significantly reduces wave celerity and height, particularly downstream, demonstrating its importance in flood mitigation. …”
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Aerodynamic Phenomena of Controlling Passive Flow of a Time‐Independent Ground Vehicle Under the Scope of Optimally Slanted Rear Wing‐Spoiler Combination by Abyaz Abid

“…RANS based k‐omega SST turbulence model is used to find the optimal slant angles for the corresponding rear wing and spoiler in terms of drag and lift coefficients, drag and lift force and rolling moment. …”
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Impact of Key DMD Parameters on Modal Analysis of High-Reynolds-Number Flow Around an Idealized Ground Vehicle by Hamed Ahani, Mesbah Uddin

“…Key findings show that a 90% contribution to the pressure drag comes from modes with a frequency of less than 26 Hz (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>t</mi></mrow></semantics></math></inline-formula> = 0.187), while the friction drag requires 84 Hz (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>t</mi></mrow></semantics></math></inline-formula> = 0.604) for similar energy capture. …”
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Le genre tactile : repenser les imbrications entre la matière et la parole au prisme de l’imagination et de l’expérience by Luca Greco

“…Drawing from a multiplicity of contexts (drag king workshops, consciousness raising groups and artistic performances), I will analyze how touching practices are mobilized and interpreted by social actors as gender (de)construction devices. …”
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On the One-Dimensional Modeling of Vertical Upward Bubbly Flow by C. Peña-Monferrer, C. Gómez-Zarzuela, S. Chiva, R. Miró, G. Verdú, J. L. Muñoz-Cobo

“…Then, we use a classical formulation of the drag coefficient approach to evaluate the performance of both approaches. …”
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Optimizing aerodynamic shape of benchmark problems using an improved Gaussian process regression algorithm by Youtao Xue, Yuxin Yang, Shaobo Yao, Wenwen Zhao, Lihua Chen

“…By using the benchmark two-dimensional Rosenbrock function for comprehensive evaluation, the results show that when optimizing this function, the AKC-GPR model reduces the number of actual function calls by 45%, and the optimization results are closer to the true value. …”
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Probabilistic Short‐Term Solar Driver Forecasting With Neural Network Ensembles by Joshua D. Daniell, Piyush M. Mehta

“…The United States Air Force (USAF) operational High Accuracy Satellite Drag Model (HASDM), relies on JB2008, (https://doi.org/10.2514/6.2008‐6438), and forecasts of solar drivers from a linear algorithm. …”
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Investigation of the Normal Blowing Approach to Controlling Wingtip Vortex Using LES by Yubiao Jiang, Wanbo Wang, Chen Qin, Patrick N. Okolo, Kun Tang

“…The characteristics and control of a wingtip vortex are of great significance when considering drag reduction and flight safety of transportation aircrafts. …”
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El sistema sexo-género en los movimientos feministas by Teresa Aguilar García

“…In this text the theoretical pair sex/gender is analyzed from its birth, according to the first researching on sexual dimorphism at the beginning of the 20th century, that showed how gender was socially determinate, whereas sex was determinate genetically. …”
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Smart resetting: An energy-efficient strategy for stochastic search processes by Ofir Tal-Friedman, Tommer D. Keidar, Shlomi Reuveni, Yael Roichman

“…We analytically calculate the energetic cost per mean first passage time and show that smart resetting consistently reduces the energetic cost compared to regular resetting. …”
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Optimization of Churning Resistance of Hypoid Gear for Automobile Rear Axle by Yunxiao Shen, Jinli Xu, Jiwei Zhu, Wenchao Yang

“…Through Fluent simulation， the churning resistance before and after improvement rear axle hypoid gear is analyzed， and compared with the empirical formula， and verified by experiments. The results show that， results of simulation analysis and test are in good agreement， the empirical formula is in good agreement with the simulation result， but less than the experimental value， the proper structural improvement and addition of oil baffle can significantly reduce the rear axle churning resistance， as the speed increases， the resistance reduction value increases， the maximum drag reduction can reach 35.9%.…”
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SHAPE OPTIMIZATION DESIGN OF THE UNDERWATER GLIDER BASED ON SURROGATE OPTIMAL ALGORITHM (MT) by YU Zhen, FAN ZhiHua, SHI HongYu, LI ZhiHua

“…In order to solve the optimization design problem of complex shape of underwater glider and improve the optimization efficiency of Kriging surrogate model while improving its lift drag ratio, an adaptive surrogate optimal algorithm is proposed. …”
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Numerical Simulation of Flow-Induced Vibration of Three-Dimensional Elastic Heat Exchanger Tube Bundle Based on Fluid-Structure Coupling by Shiqin Ai, Chao Sun, Yuechan Liu, Yuelin Li

“…The vibration frequencies of single-span and multispan tube bundles are consistent with the lift and drag frequencies, the vibration displacement curves show typical Strouhal modes, and the amplitude increases with the increase of fluid velocity. …”
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Experiment Research and Design of a New Wet Type Mechanical Joint Brake System Applied to Long Stroke by Yin Xiaoqing

“…In order to solve the problems of long stroke mechanical joint brake system difficulty in design,manufacturing and repair costs are high,a new wet brake in long stroke mechanical joint brake system is introduced,and the expressions of key design index of new braking system is derived,finally,the experiment platform for the research of the variation law of braking characteristics of a new wet type long stroke mechanical joint brake system is built. The results show that the new joint brake in the initial stage of braking has certain drag torque phenomenon in single braking condition. …”
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Bearing Fault Diagnosis Method based on Self-adaptive Stochastic Resonance of Genetic Algorithm and VMD by Zhang Chao, He Yuanyuan

“…Based on the experimental data,the results show that the method can effectively improve the accuracy of bearing fault diagnosis.…”
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Study on Layout Design of Curve Tension Constraint and Tension Characteristic of Multi Axis Silent Chain System by Fan Chengyan, Xu Shuxin, Wang Hongjun, Xing Jianheng

“…By using the cylinder head anti drag system test bench,the tension force under different rotating speed and the torque of the crankshaft is tested. …”
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Improving Forecasting Ability of GITM Using Data‐Driven Model Refinement by Brandon M. Ponder, Aaron J. Ridley, Ankit Goel, D. S. Bernstein

“…Abstract At altitudes below about 600 km, satellite drag is one of the most important and variable forces acting on a satellite. …”
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