Results 31 to 40 of about 24,317 (245)

Experimental Study of Airfoil Aerodynamic Behavior under Oscillating Motion in Ground Effect [PDF]

Journal of Applied Fluid Mechanics
When a flying vehicle approaches a water or land surface, it induces changes in the fluid flow field pattern known as the "ground effect." This research analyzes the ground effect phenomenon, exploring its impact on aerodynamic coefficients and flow ...
M. Hadi Doolabi, M. Bakhtiarifar, H. Sadati   +2 more
doaj   +1 more source

Kinematics and dynamics of pitching flexible panels in a quiescent fluid

, 2021
An experimental investigation was carried out to understand the kinematics and dynamics of flexible panels having pure pitching motion in a quiescent fluid.
Vishwasrao, A, Deshpande, P
core   +1 more source

Magnitude and variability of individual elbow load in repetitive baseball pitching

Scientific Reports, 2023
In baseball pitchers the elbow is exposed to high and repetitive loads (i.e. external valgus torque), caused by pitching a high number of balls in a practice session or game.
Bart van Trigt, Thomas van Hogerwou, Ton A. J. R. Leenen, Marco J. M. Hoozemans, Frans C. T van der Helm, DirkJan H. E. J. Veeger   +5 more
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park, Eun‐Hyuk Choi, Jorge Otero‐Millan, David S. Zee, Jeong‐Yoon Choi, Ji‐Soo Kim   +5 more
wiley   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Unsteady Flow past a Flapping Aerofoil [PDF]

, 2012
: Unsteady flow computations are presented for low speed Mach number flow past a combined pitching and plunging aerofoil. The Implicit Reynolds-averaged Navier-Stokes solver used for obtaining time-accurate solutions is based on finite volume nodal ...
Siva Kumar, K, Sharanappa, Sajjan V
core  

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Relationship between ball release point variability and pitching performance in major league baseball

Frontiers in Sports and Active Living
IntroductionThis study examined the relationship between ball release points and pitching performance among professional baseball pitchers, with a focus on variability.MethodsWe used open-source data to compare ball release point variability between ...
Kazuki Wakamiya, Hideaki Nagamoto, Hideaki Nagamoto, Ryusei Yamaguchi, Takumi Okunuki, Takumi Okunuki, Toshihiro Maemichi, Zijian Liu, Yuki Ogawa, Yusuke Kobayashi, Tsukasa Kumai   +10 more
doaj   +1 more source

Effects of non-sinusoidal pitching motion on the propulsion performance of an oscillating foil.

PLoS ONE, 2019
Numerical simulations have been used in this paper to study the propulsion device of a wave glider based on an oscillating hydrofoil, in which the profile of the pitching and heaving motion have been prescribed for the sake of simplicity.
Zhanfeng Qi, Jingsheng Zhai, Guofu Li, Jiazhong Peng   +3 more
doaj   +1 more source