Results 291 to 300 of about 9,908,808 (335)

Gross cycling efficiency is not altered with and without toe-clips

Journal of Sports Sciences, 2008
The aim of this study was to examine the claim that reductions of 8-18% in submaximal oxygen consumption (VO2) could be due to changing components on a Monark ergometer, from standard pedals without toe-clips or straps (flat pedals) to racing pedals of that era, which included toe-clips and straps (toe-clip pedals).
Gore, Christopher J, Ostler, Laura M, Betts, James A   +2 more
openaire   +3 more sources

Variation of gross primary production, evapotranspiration and water use efficiency for global croplands

, 2020
An improved understanding of the productivity and water use efficiency (WUE) of global croplands is essential for coping with the growing demand for food and water.
Zhipin Ai, Qin-Xue Wang, Yong-Hui Yang, K. Manevski, S. Yi, Xin Zhao   +5 more
semanticscholar   +1 more source

Determining the Gross Efficiency of a Boiler in Real Time

Power Technology and Engineering, 2014
Atechnique for the continuous automatic determination of the gross efficiency of a boiler from the readings of regular process-control instruments was developed and implemented at a CHPP. The possibility of saving fuel by controlling the efficiency of the boiler in real time is discussed.
A. V. Pyatalov, I. V. Malyshev, S. A. Shevtsov, N. G. Yakovlev   +3 more
openaire   +1 more source

Impacts of diffuse radiation fraction on light use efficiency and gross primary production of winter wheat in the North China Plain

Agricultural and Forest Meteorology, 2019
The increase of diffuse radiation fraction (kd) has been reported to significantly impact light use efficiency (LUE) and carbon uptake in terrestrial ecosystems.
Xiaoya Yang, Jun Li, Qiang Yu, Yuchun Ma, X. Tong, Yan Feng, Ying Tong   +6 more
semanticscholar   +1 more source

Sources of uncertainty in gross primary productivity simulated by light use efficiency models: Model structure, parameters, input data, and spatial resolution

Agricultural and Forest Meteorology, 2018
Accurate estimation of gross primary productivity (GPP) is essential for understanding ecosystem function and global carbon cycling. However, there is still substantial uncertainty in the magnitude, spatial distribution, and temporal dynamics of GPP ...
Yi Zheng, Li Zhang, Jingfeng Xiao, W. Yuan, W. Yuan, Min Yan, Tong Li, Zhiqiang Zhang   +7 more
semanticscholar   +1 more source

Gross Mechanical Efficiency Of Trained Wheelchair Racers

[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
This paper presents the results of a study of gross mechanical efficiency of racing wheelchair propulsion. Our subjects displayed maximum gross mechanical efficiencies over 30%. Typically trained runners show efficiencies of approximately 25%. Our results may help to explain why trained wheelchair racers are faster than runners.
R.A. Cooper, J.F. Bedi
openaire   +1 more source

Load and Velocity of Contraction Influence Gross and Delta Mechanical Efficiency

International Journal of Sports Medicine, 1992
The effects of three different cadences and five different work rates on Gross (GE) and Delta Efficiency (DE) during cycle ergometry were studied. Fifteen well-trained cyclists exercised for 30 minutes at 60, 80, or 100 RPM on three different occasions. On each occasion, the load was increased every five minutes and corresponded to approximately 50, 60,
L S, Sidossis, J F, Horowitz, E F, Coyle
openaire   +2 more sources

The Reliability and Adaptive Responses of Gross Efficiency in Hot Ambient Conditions

International Journal of Sports Medicine, 2014
This study evaluated the reliability and adaptive responses of cycling gross efficiency (GE) performed at different intensities, across 3 trials in simulated hot (~30°C) temperatures. Twelve cyclists performed 3 hot (30±0.7ºC and RH of 50±2.9%) GE sessions, comprising 3 sub-maximal work rates of 150 W, 200 W and 250 W (5-min each), separated by 24-h ...
openaire   +4 more sources

Effect of Duration and Exogenous Carbohydrate on Gross EfficiencyDuring Cycling

The Journal of Strength and Conditioning Research, 2007
The purpose of this investigation was to determine the effects of 2.5 hours of cycling with and without carbohydrate supplementation on gross efficiency (GE). Trained cyclists (N = 15) were tested for V(.-)O2max (53.6 + 2.2 ml x kg(-1) x min(-1)) and lactate threshold during incremental tests to exhaustion.
Charles L, Dumke, Jeffrey M, McBride, David C, Nieman, William D, Gowin, Alan C, Utter, Steven R, McAnulty   +5 more
openaire   +2 more sources

Assessing gross efficiency and propelling efficiency in swimming

2011
Determining the efficiency (and the economy) of a movement is a primary goal for those interested in understanding, and possibly improving, human locomotion and/or sport’s performance. This goal is particularly difficult to achieve in swimming where different “efficiencies” could be computed based on the partitioning of mechanical power output into its
openaire   +1 more source