Results 81 to 90 of about 207,403 (310)
MathematicsThe utilization of unmanned sailboats as a burgeoning instrument for ocean exploration and monitoring is steadily rising. In this study, a dual sail configuration is put forth to augment the sailboats’ proficiency in its wind-catching ability and adapt ...
Shipeng Fang +6 more
doaj +1 more source
Calculated Hovering Helicopter Flight Dynamics with a Circulation Controlled Rotor [PDF]
The influence of the rotor blowing coefficient on the calculated roots of the longitudinal and lateral motion was examined for a range of values of the rotor lift and the blade flap frequency.
Chopra, I., Johnson, W.
core +1 more source
Measuring method of drag coefficient, lift coefficient and equivalent roughness of revetment block
PROCEEDINGS OF HYDRAULIC ENGINEERING, 2000 This study examines measuring methods of drag coefficient, lift coefficient and equivalent roughness that are necessary for mechanical design of revetment blocks set on river banks. The setting method of blocks and the influence of the Reynolds number on drag force and lift force are examined by checking the experimental results.
Kouichi YAMAMOTO +6 more
openaire +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Poststroke fatigue (PSF) and frailty share substantial overlap in their manifestations, yet previous research has yielded conflicting results due to the use of heterogeneous frailty assessment tools. Objective To evaluate the independent impact of frailty on PSF using a unified measurement system (Tilburg Frailty Indicator, TFI ...
Chuan‐Bang Chen +6 more
wiley +1 more source
The effect of staggering a biplane [PDF]
This investigation was carried out by request of the United States Air Service at the Massachusetts Institute of Technology wind tunnel in 1918. As the data collected may be of general interest, they are published here by the National Advisory Committee ...
Norton, F H
core +1 more source
Prediction Model for Etiologic Differentiation of Isolated Vestibular Syndrome in Emergency Settings
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective This study aimed to develop and validate a predictive model for differentiating central from peripheral etiologies in patients with isolated vestibular syndrome (VS). Methods In this multicenter retrospective cohort study, 506 patients with isolated VS from five hospitals were divided into derivation (n = 301) and validation (n = 205)
Guo Wenting +12 more
wiley +1 more source
Effect of Gurney Flap Geometry on a S809 Airfoil
International Journal of Aerospace Engineering, 2019 In this paper, the effect of Gurney flap shapes on wind turbine blade airfoil S809 has been studied by numerical simulation. First, the O-type grid is used in the numerical simulation. By comparing with experimental data, such as the lift force, the drag
Li-Shu Hao, Yong-Wei Gao
doaj +1 more source
Accelerated Progression of Gait Impairment in Parkinson's Disease and REM Sleep Without Atonia
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective People with Parkinson's disease (PD) and rapid eye movement (REM) sleep without atonia (RSWA) often have more severe gait disturbances compared to PD without RSWA. The association between the presence and expression of RSWA and the rate of progression of gait impairment in PD is unknown.
Sommer L. Amundsen‐Huffmaster +11 more
wiley +1 more source
NUMERICAL SIMULATION OF FLOW ROUND FREE SPANNING SUBMARINE PIPELINE AT HIGH REYNOLDS NUMBER
Jixie qiangdu, 2018 Free spanning submarine pipeline work in the harsh condition and has many failure modes. Vortex-induced vibration is a significant cause leading to its fatigue failure.
HU Qin +3 more
doaj
NASA low- and medium-speed airfoil development [PDF]
The status of NASA low and medium speed airfoil research is discussed. Effects of airfoil thickness-chord ratios varying from 9 percent to 21 percent on the section characteristics for a design lift coefficient of 0.40 are presented for the initial low ...
Beasley, W. D. +2 more
core +1 more source