Results 81 to 90 of about 160,252 (187)

Computer program documentation for a subcritical wing design code using higher order far-field drag minimization [PDF]

A subsonic, linearized aerodynamic theory, wing design program for one or two planforms was developed which uses a vortex lattice near field model and a higher order panel method in the far field.
Kuhlman, J. M., Shu, J. Y.
core   +1 more source

Engineering simulation evaluation of the two-segment noise abatement approach in the Douglas DC-8-61 [PDF]

The development and operational evaluation are discussed of a noise abatement two-segment approach which is safe and operationally acceptable for routine use in air carrier service.
Nylen, W. E.
core   +1 more source

Using a Sensor-Embedded Baseball to Identify Finger Characteristics Related to Spin Rate and Pitching Velocity in Pitchers

Sensors
Background: Previous investigations have shown a positive relationship between baseball pitching velocity and the kinetic chain involved in pitching motion.
Ming-Chia Yeh, Wen-Wen Yang, Yu-Hsuan Hung, Ya-Chen Liu, Jung-Tang Kung, Hsi-Pin Ma, Chiang Liu   +6 more
doaj   +1 more source

An improved source flow characteristic technique for the analysis of scramjet exhaust flow fields [PDF]

The process is discussed of designing a nozzle for a hypersonic airbreathing vehicle which involves a complex study of the inter-relationship among many parameters: internal-external expansion, vehicle lift, drag, pitching moments, and structural and ...
Dash, S., Delguidice, P. D.
core   +1 more source

3D Baseball Pitcher Pose Reconstruction Using Joint-Wise Volumetric Triangulation and Baseball Customized Filter System

IEEE Access
3D human pose estimation (HPE) has become increasingly important in baseball analytic, but there are several difficulties pertaining to pose estimation in real-world baseball pitching.
Yun-Wei Chiu, Kuei-Ting Huang, Yuh-Renn Wu, Jyh-How Huang, Wei-Li Hsu, Pei-Yuan Wu   +5 more
doaj   +1 more source

Sinusoidal-gust generation with a pitching and plunging airfoil

, 2019
The generation of uniform, periodic gust disturbances in an experimental context is demonstrated using a single oscillating airfoil. A pitching and heaving symmetric airfoil is suggested as a simpler alternative to existing gust-generation methods.
Kissing, Johannes, Tropea, Cameron, Wei, Nathaniel J.   +2 more
core   +1 more source

Plunge law and mechanical mechanisms of fault-controlled ore bodies (clusters) in hydrothermal deposits

Dizhi lixue xuebao
Objective  Hydrothermal mineral deposits provide a representative example of tectonic–fluid coupled metallogenic systems, and the lateral plunge law of ore bodies or ore body clusters constitutes their three-dimensional expression in geological space ...
HAN Runsheng, ZHANG Yan, LUO Jin, HUANG Baosheng, HU Ticai   +4 more
doaj   +1 more source

Note on the air forces on a wing caused by pitching. [PDF]

The following contains information on the air forces on a wing produced by it's pitching at a finite rate of angular velocity. The condition of smooth flow at the region of the trailing edge is maintained.
Munk, Max M
core   +1 more source

Numerical study of asymmetric pitching amplitude effects on energy extraction performance of a semi-activated hydrofoil in shear flows

Applied Ocean Research
As a representative tidal current energy device, the operational stability and energy extraction performance of hydrofoils are significantly influenced by shear flow.
Hengliang Qu, Xueyan Li, Jinhai Zheng
doaj   +1 more source

Grip strength, muscle soreness and pain threshold perception evolution in baseball pitchers in a simulated 75-pitch game: a repeated measures study

BMJ Open Sport & Exercise Medicine
Background/aim In baseball pitching, neuromuscular fatigue and its manifestations on muscle strength, muscle soreness and pain perception affect pitching performance.
Martin Descarreaux, Mathieu Tremblay, Samuel Anderson Sirois, Jacques Abboud   +3 more
doaj   +1 more source