Results 61 to 70 of about 367,561 (307)
Arthritis Care &Research, EarlyView.Objective Obesity, defined by body mass index (BMI) ≥30 kg/m2, is a risk factor for functional limitations in people with knee osteoarthritis (OA). However, function varies among such individuals. Our objective was to evaluate the implications of obesity subtypes on longitudinal patterns of physical functioning in people with or at risk for knee OA ...
Kristine Godziuk +7 more
wiley +1 more source
Noise of the SR-6 propeller model at 2 deg and 4 deg angles of attack [PDF]
The noise generated by supersonic-tip-speed propellers creates a cabin noise problem for future airplanes powered by these propellers. Noise of a number of propeller models were measured in the NASA Lewis 8- by 6-Foot Wind Tunnel with flow parallel to ...
Dittmar, J. H., Stefko, G. L.
core +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 +2 more
wiley +1 more source
The angle of attack and side-slip angle estimation for civil aircraft
Journal of Physics: Conference Series, 2023 Abstract The angle of attack and side-slip angle are two important flight parameters that directly affect the flight safety of civil aircraft. This paper studies the estimation method for the angle of attack and side-slip angle according to air-data system, inertial navigation system, and aircraft aerodynamic data to improve flight ...
openaire +1 more source
High-angle-of-attack pneumatic lag and upwash corrections for a hemispherical flow direction sensor [PDF]
As part of the NASA F-14 high angle of attack flight test program, a nose mounted hemispherical flow direction sensor was calibrated against a fuselage mounted movable vane flow angle sensor.
Deleo, Richard V. +5 more
core +1 more source
The motion of a plate in a rotating fluid at an arbitrary angle of attack [PDF]
, 1972 Slow motion of a thin plate at a finite angle of attack in a rotating container filled with a viscous incompressible fluid is analysed. The Rossby and Ekman numbers are assumed to be small.
Wilcox, David C.
core
Advanced Engineering Materials, EarlyView.The corrosion performance of AlSi7Mg and AlSi10Mg alloys produced through selective laser melting (SLM) was examined under compressive stress in a chloride environment. Electrochemical analyses, including open‐circuit potential (OCP), potentiodynamic polarization (CPP), and electrochemical impedance spectroscopy (EIS), were complemented by scanning ...
Femi John Akinfolarin +2 more
wiley +1 more source
Studi Eksperimen dan Numerik Pengaruh Penambahan Vortex Generator pada Airfoil NASA LS-0417
Jurnal Teknik ITS, 2017 Separasi boundary layer merupakan fenomena penting yang mempengaruhi performansi airfoil. Salah satu upaya untuk menunda atau menghilangkan separasi aliran adalah meningkatkan momentum fluida untuk melawan adverse pressure dan tegangan geser permukaan ...
Ulul Azmi, Herman Sasongko
doaj
Experimental Investigation of Aerodynamic Noise Characteristics of Tandem Asymmetric Airfoils Across Varied Angles of Attack [PDF]
Journal of Applied Fluid MechanicsThis paper experimentally investigates the aerodynamic noise characteristics of a tandem asymmetric airfoil-airfoil at different angles of attack in the 0.5 m×0.4 m acoustic wind tunnel at Wenzhou University.
W. Shi, Y. Li, J. Zhou, Z. Chen
doaj +1 more source
High Angle of Incidence Implications upon Air Intake Design and Location for Supersonic Cruise Aircraft and Highly Maneuverable Transonic Aircraft [PDF]
Computational results which show the effects of angle of attack on supersonic mixed compression inlet performance at four different locations about a hypothetical forebody were obtained.
Presley, L. S.
core +1 more source