An On-Water Analysis System for Quantifying Stroke Force Characteristics during Kayak Events

A system was developed to quantify the on-water forces, impulse, and power generated by a kayak paddlet. The system is lightweight (<1 kg), portable (i.e., it can be used in single [Kl], double [K2], and fours [K4] boats), and does not affect the integrity of either the kayak paddle or the boat. Changes in the strain on the kayak paddle were measured by force transducers attached to the shaft of the paddle, and these signals were then recorded on an FM tape recorder located in the boat. The data were then analyzed by the Kayak Data Acquisition and Analysis System software which graphically presented the paddlers' force time curve as well as a printed tabular report on the paddlers' average force, impulse, work, power, and the instantaneous boat velocity.

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Using the Force-Time Curve to Detect Maximal Grip Strength Effort

Journal of Hand Therapy ◽

10.1197/j.jht.2006.10.006 ◽

2007 ◽

Vol 20 (1) ◽

pp. 37-48 ◽

Cited By ~ 18

Author(s):

Orit Shechtman ◽

Bhagwant S. Sindhu ◽

Paul W. Davenport

Keyword(s):

Grip Strength ◽

Time Curve ◽

Force Time

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The Relationship Between Isometric Force-Time Curve Characteristics and Club Head Speed in Recreational Golfers

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0b013e31826791bf ◽

2012 ◽

Vol 26 (10) ◽

pp. 2685-2697 ◽

Cited By ~ 26

Author(s):

Brian K. Leary ◽

Jason Statler ◽

Britton Hopkins ◽

Rachael Fitzwater ◽

Tucker Kesling ◽

...

Keyword(s):

Isometric Force ◽

Time Curve ◽

Club Head ◽

Force Time ◽

The Relationship ◽

Recreational Golfers

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Streamlining Chinese Highway Accident Data Acquisition, Communications, and Analysis

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1846-06 ◽

2003 ◽

Vol 1846 (1) ◽

pp. 31-38 ◽

Cited By ~ 1

Author(s):

Ping Yi ◽

Bin Ran

Keyword(s):

Data Acquisition ◽

Large Data ◽

Highway Safety ◽

Data Mapping ◽

Data Logger ◽

Safety Program ◽

Crash Data ◽

Accident Data ◽

Analysis System ◽

Set Up

This research examines a streamlined accident data acquisition, communications, and analysis system to improve the Chinese highway safety program. A data logger compatible with the Global Positioning System and geographic information system is proposed to identify highway accident locations and organize the data into a database format. A data encoding concept is used to transform Chinese characters into numbers, so that the encoded data are easy to integrate into a large data system. A three-tier client–server networking system is set up as the backbone framework for data communications between the central database and distributed local offices. Using local database functions, traffic police at the client level can view crash data through data mapping and attribute listing and analyze the data through nested query and sorting operations. A data graphing and analysis module was tested for automatically constructing a collision diagram on selected data. The proposed approach to crash data acquisition and analysis was found to be feasible and effective and will help to enhance China’s highway safety program after full implementation.

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Control of Rapidly Executed Forces to a Target

Perceptual and Motor Skills ◽

10.2466/pms.1987.65.3.827 ◽

1987 ◽

Vol 65 (3) ◽

pp. 827-836

Author(s):

Donald Siegel

Keyword(s):

Visual Feedback ◽

Predictor Variable ◽

Peak Force ◽

Important Predictor ◽

Force Amplitude ◽

Time Curve ◽

Time To Peak ◽

Hand Grip ◽

Rapid Responses ◽

Force Time

The purpose of the present study was to determine whether initial measures of impulse (i.e., area under the force-time curve) could be used to predict peak force (PF) in hand grip responses of 5- and 10-kg amplitude executed as rapidly as possible. 12 subjects performed 75 practice and 25 test contractions in each condition, with and without visual feedback. The time to peak (PT) for the 5-kg responses was 41 msec., while the 10-kg condition averaged 56 msec. Analyses demonstrated no effect for visual feedback. Correlational analyses of cumulative impulse sections from 5 msec., to PF within conditions showed that early measures of force within a response were not very good predictors of final force amplitude. Indeed, for both conditions upwards of 85% of a reponse needed to have occurred before 50% of PF variance could be predicted. Analyses across conditions demonstrated that 50% of PF variance could be predicted between 15 and 20 msec. PT was also an important predictor variable. By using PT along with cumulative impulse 50% of the variance in PF could be predicted prior to 10 msec., at 5 kg (25% of PT) and at about 15 msec., for 10 kg (27% of PT). Across conditions, 85% of the variance in PF was predictable by 5 msec. Such results suggest that either more refined response indices are needed in predicting response outcome or that even for very rapid responses some lower level “tuning” probably occurs after initiation.

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