Comparison of methods for determining power generated on a rope-braked cycle ergometer during low-intensity exercise     

K. L. Franklin  R. S. Gordon  J. S. Baker  B. Davies 《Sports Engineering》2006,9(1):29-38

This study compares the instrumentation and analysis techniques used when determining the power expended pedalling a rope-braked ergometer manufactured by Monark (Sweden) during a low intensity test. Power values were generated by eight subjects. The instrumentation consisted of load cells to measure the rope brake forces, a tachometer to measure the flywheel velocity and instrumented pedal cranks manufactured by Schoberer Rad Messtechnik (SRM). The subjects pedalled a rope-braked ergometer at 60 rev min^-1, against a resistance of 3 kg, for 5 minutes. Three different measurements of the mean power were recorded and these were compared with the value given by Monark. The SRM cranks provided two sets of results using different software packages supplied with the cranks. SRM standard software is used for taking measurements during training and cycle races over long time periods. An additional piece of software is provided by SRM called Ptnew, which gives readings of torque and pedal cadence over periods up to 30 seconds. Using the values supplied by Monark each subject generated 180 W of power. The mean power for the eight subjects, measured using the SRM cranks, was 170.36 W (SD 4.11) using the alternative SRM software (Ptnew) over a 30 second period and 173.68 W (SD 2.21) using the standard SRM software. From the direct measurement of the brake forces and flywheel velocity the mean power across the eight subjects was 148.90 W (SD 5.89). The SRM cranks measure the input power, whereas the direct measurement system measures the power output excluding mechanical losses. These values give a figure for the mechanical efficiency for the roped-braked ergometer of 88%. It was found that Monark overestimates the power generated by the subjects when compared with both the SRM systems and the direct measurement instrumentation.  相似文献   

I. Overview of the child study center     

Sara J. Little  Marilyn Savage  Kathleen Somers  A. Alleane Taylor  Franklin Tinney  Sherrill Werblood-Manges 《Annals of dyslexia》1974,24(1):106-121

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Changing book publishing objectives of secular black book publishers, 1900–1986     

Donald Franklin Joyce 《Publishing Research Quarterly》1986,2(3):42-50

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Book reviews   总被引：1，自引：0，他引：1  

Franklin Fearing  Alexander H. Howard 《Educational technology research and development : ETR & D》1955,3(3):229-237

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Revisionist vs. Traditionalist Clash: Do Schools Perpetuate Caste,or Aid Upward Mobility     

Franklin Parker 《Review of Education, Pedagogy & Cultural Studies》2013,35(2):131-133

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The Teacher as Creative Artist: Harold O. Rugg: 1886‐1960     

Franklin Parker 《Review of Education, Pedagogy & Cultural Studies》2013,35(4):357-361

IN AN AGE OF MASS CONSUMPTION In our age of mass consumption, the ubiquity of commodification's many forms establishes and constitutes a significant fact of our everyday existence. A Starbucks on every corner. Between supermarket and superstore, supply almost never a problem. So much merchandise just a mouse click away. Nearly everything having its price. A product for every imaginable problem.  相似文献   

A Cross-Linguistic Investigation of English Language Learners' Reading Comprehension in English and Spanish     

Jonathan Nakamoto  Kim A. Lindsey  Franklin R. Manis 《Scientific Studies of Reading》2013,17(4):351-371

This study investigated the associations of oral language and reading skills with a sample of 282 Spanish-speaking English language learners across 3 years of elementary school. In the 3rd grade, the English and Spanish decoding measures formed two distinct but highly related factors, and the English and Spanish oral language measures formed two factors that showed a small positive correlation between them. The decoding and oral language factors were used to predict the sample's English and Spanish reading comprehension in the 6th grade. The decoding and oral language factors were both significant predictors of reading comprehension in both languages. The within-language effects were larger than the cross-language effects and the cross-language effects were not significant after accounting for the within-language effects.  相似文献   

亲爱的父亲们,节日快乐!     

Brad Franklin 《英语沙龙》2013,(6):22

Hi Brad, The Father's Day is coming.I am always too shy to express my feeling to my father as he,in my eyes,is so serious.Maybe his action has said all for him,and there's so little left to the words.Brad,do you also prefer to have actions instead of words to say everything for you? Please tell me more about your story of being a father.  相似文献   

你好,夏威夷!     

Brad Franklin 《英语沙龙》2013,(9):62-63

半年不见的Brad又回来了!喜欢旅行和爱好广泛的他,似乎永远都会为我们带来不同的精彩故事和见闻。那让我们依旧跟随他的文字和图片,穿越空间上的距离,一同享受那游走在世界的美丽心情!  相似文献   

面对不喜欢的团队活动     

Brad Franklin 《英语沙龙》2013,(5):20

不少单位和集体都会组织一些团队建设活动,以增强同事间的了解和公司的凝聚力,这些活动常常也是一个职场新人融入新团队的最好时机之一。但是有时候你并不想参加这样的活动,心里会暗自盘算着去还是不去的利弊,那正好来听听有着丰富职场经验的Brad的忠实建议。  相似文献