Effects of modified-implement training on fast bowling in cricket     

Petersen CJ  Wilson BD  Hopkins WG 《Journal of sports sciences》2004,22(11-12):1035-1039

The effects of training with overweight and underweight cricket balls on fast-bowling speed and accuracy were investigated in senior club cricket bowlers randomly assigned to either a traditional (n = 9) or modified-implement training (n = 7) group. Both groups performed bowling training three times a week for 10 weeks. The traditional training group bowled only regulation cricket balls (156 g), whereas the modified-implement training group bowled a combination of overweight (161-181 g), underweight (151-131 g) and regulation cricket balls. A radar gun measured the speed of 18 consecutive deliveries for each bowler before, during and after the training period. Video recordings of the deliveries were also analysed to determine bowling accuracy in terms of first-bounce distance from the stumps. Bowling speed, which was initially 108 +/- 5 km h(-1) (mean +/- standard deviation), increased in the modified-implement training group by 4.0 km x h(-1) and in the traditional training group by 1.3 km x h(-1) (difference, 2.7 km x h(-1); 90% confidence limits, 1.2 to 4.2 km x h(-1)). For a minimum worthwhile change of 5 km x h(-1), the chances that the true effect on bowling speed was practically beneficial/trivial/harmful were 1.0/99/< 0.1%. For bowling accuracy, the chances were 1/48/51%. This modified-implement training programme is not a useful training strategy for club cricketers.  相似文献   

The association between fundamental athletic movements and physical fitness in elite junior Australian footballers     

Carl T. Woods  Ian McKeown  Justin Keogh  Sam Robertson 《Journal of sports sciences》2018,36(4):445-450

This study investigated the associations between fundamental athletic movement and physical fitness in junior Australian football (AF). Forty-four under 18 players performed a fundamental athletic movement assessment consisting of an overhead squat, double lunge, single leg Romanian deadlift and a push up. Movements were scored on three assessment criterions using a three-point scale. Additionally, participants performed five physical fitness tests commonly used for talent identification in AF. A Spearman’s nonparametric correlation matrix was built, with correlation coefficients being visualised using a circularly rendered correlogram. Score on the overhead squat was moderately positively associated with dynamic vertical jump height on left (r_s = 0.40; P ≤ 0.05) and right (r_s = 0.30; P ≤ 0.05) leg take-off, stationary vertical jump (r_s = 0.32; P ≤ 0.05) and negatively associated with 20-m sprint time (r_s = ?0.35; P ≤ 0.05). Score on the double lunge (left/right side) was moderately positively associated with the same physical fitness tests as well as score on the multistage fitness test. Results suggest that improvements in physical fitness qualities may occur through concurrent increases in fundamental athletic movement skill, namely the overhead squat and double lunge movements. These findings may assist with the identification and development of talent.  相似文献   

Comparing Results from the Clinical Assessment of Behavior and Child Behavior Checklist with Referred Preschoolers     

Carl L. Myers 《Psychology in the schools》2013,50(1):1-12

Behavior rating scales are popular assessment tools but more research is needed on the preschool versions of the instruments, particularly with referred samples of preschoolers. This study examined the comparability of results from parent ratings on the preschool versions of the Child Behavior Checklist (CBCL/1.5‐5, Achenbach & Rescorla, 2000) and the Clinical Assessment of Behavior‐Parent form (CAB‐P, Bracken & Keith, 2004) with 74 clinically referred preschoolers. While pairs of similarly named scales from the two instruments received significant correlations, mean scores from the CBCL/1.5‐5 were significantly higher than those from the CAB‐P. Classification consistency was a concern as well. School psychologists are urged to be cautious in their interpretation of results from preschool behavior rating scales.  相似文献   

Broadcasting and Telecommunications     

G.W.A. Dummer  Carl Dreher  George W. Bartlett  Richard Veith  Dan Rather  Mickey Herskowitz 《Communication Booknotes Quarterly》2013,44(11):132-135

G.W.A. Dummer's Electronic Inventions: 1745-1976 (Oxford, England: Pergamon Press, 1976—£5.50 or $10.00)

Carl Dreher's Sarnoff: An American Success (New York: Quadrangle/ New York Times Book Co., 1977—$12.50)

George W. Bartlett, ed. NAB Engineering Handbook (Washington: National Association of Broadcasters, 1975—$45.00; $30.00 to NAB and BEA members)

Richard Veith's Talk-Back TV: Two-Way Cable Television (Blue Ridge Summit. Pa.: TAB Books, 1976—$9.95/5.95)

Dan Rather with Mickey Herskowitz' The Camera Never Blinks: Adventures of a TV Journalist (New York: Morros, 1977—$10.00)

F. Gifford's Tape: A Radio News Handbook (New York: Hastings House, 1977—$12.95/6.95)

F. Earle Barcus' Children's Television: An Analysis of Programming and Advertising (New York: Praeger Special Studies, 1977—price not given, but likely around $18.00)

Douglas Davis and Allison Simmons' The New Television: A Public/Private Art (Cambridge, Mass.: MIT Press, 1977—$14.95)

The Videophile's Newsletter (Jim Lowe, 2014 South Magnolia Drive, Tallahassee, Fla. 32301—$7.50 for five issues)

Separations Procedures in the Telephone Industry: The Historical Origins of a Public Policy, by James W. Sichter (January 1977, Publication P-77-2, 146 pp. $23.40, paper)

The Communications Act Policy Toward Competition: The Sound of One Hand Clapping by Hamilton Loeb (March 1977, Working Paper W-77-1, 68 pp., $ 10.90)

Broadcasting: The Next Ten Years (New York: National Broadcasting Co., Department of Corporate Planning, 1977—apparently free on request, paper)

NFLCP Newsletter (P.O. Box 119, Cambridge, Mass. 02142—$7.50 annually, bimonthly; $15.00 to organizations)

Gary Gerani and Paul H. Schulman's Fantastic Television (New York: Harmony Books/Crown Publishers, 1977—$12.95/5.95)  相似文献   

Commonwealth Media     

Colin R. Munro  Ray Brown  Lars Engwall  Carl Gardner  Asa Briggs  Graham Cleverley 《Communication Booknotes Quarterly》2013,44(5):106-110

Television, Censorship and the Law, by Colin R. Munro (208 pp.---$22.00)

Characteristics of Local Media Audiences, by Ray Brown (130 pp.---$23.00)

Newspapers as Organizations, by Lars Engwall (288 pp.---$29.0O)

Broadcasting and Youth (London: Calouste Gulbenian Foundation, 98 Portland Place, London W1N 4ET, 1979---£1.70 or about $4.00, paper)

Carl Gardner, ed. Media, Politics & Culture: A Socialist View (London: Macmillan/Atlantic Highlands, N.J.: Humanties Press, 1979---$21.50/9.75)

Asa Briggs, Governing the BBC (London: British Broadcasting Corporation, 1979---£10.00 or about $22.00)

Graham Cleverley's The Kettering Standoff: A Study of a Strike (Southhamption: Aeropagus, 1978---price not given, but available in hardback and paper)

Paul Hoch's The Newspaper Game: The Political Sociology of the Press (London and New York: Marian Boyars Ltd., 1974, released US in 1979---$10.00)

Canadian Radio-television and Telecommunications Commission (CRTC Information Services, Ottawa, Ontario K1A ON2, Canada---available free on request, paper)

Australia: Henry Mayer tells us of nine recent publications on page  相似文献   

Use and perceptions of information among family physicians: sources considered accessible,relevant, and reliable     

Julie G. Kosteniuk  Debra G. Morgan  Carl K. D'Arcy 《Journal of the Medical Library Association》2013,101(1):32-37

Objectives:

The research determined (1) the information sources that family physicians (FPs) most commonly use to update their general medical knowledge and to make specific clinical decisions, and (2) the information sources FPs found to be most physically accessible, intellectually accessible (easy to understand), reliable (trustworthy), and relevant to their needs.

Methods:

A cross-sectional postal survey of 792 FPs and locum tenens, in full-time or part-time medical practice, currently practicing or on leave of absence in the Canadian province of Saskatchewan was conducted during the period of January to April 2008.

Results:

Of 666 eligible physicians, 331 completed and returned surveys, resulting in a response rate of 49.7% (331/666). Medical textbooks and colleagues in the main patient care setting were the top 2 sources for the purpose of making specific clinical decisions. Medical textbooks were most frequently considered by FPs to be reliable (trustworthy), and colleagues in the main patient care setting were most physically accessible (easy to access).

Conclusions:

When making specific clinical decisions, FPs were most likely to use information from sources that they considered to be reliable and generally physically accessible, suggesting that FPs can best be supported by facilitating easy and convenient access to high-quality information.

Highlights

• Medical textbooks were the most popular information source for family physicians'' (FPs'') clinical decision-making purposes, and medical journals were the most popular information source for the purpose of updating FPs'' general medical knowledge.
• FPs considered medical textbooks to be the most reliable (trustworthy) source, colleagues the most physically accessible, and continuing medical education the most relevant and intellectually accessible.
• The lowest ranked information sources across all four attributes were personal digital assistants, mental health professionals, pharmaceutical sales representatives, and other decision aids.

Implications

• The most popular information sources for clinical decision-making purposes among FPs were sources characterized as reliable and generally physically accessible.
• This study suggests the need for further research into interventions that target information access barriers in FPs'' practice settings and the promotion of reliable evidence for FPs'' clinical decision-making purposes.

  相似文献   

Construction Zones on the Library Road to the Future     

Carl Grant 《Public Library Quarterly》2013,32(1):21-47

This article suggests that substantial and often disturbing change is the only way that libraries can achieve a bright future in an increasingly digital world. Libraries must quickly adopt mobile technology, cloud computing, eScience, and the systematic organization and dissemination of quality information—and do so within the context of collaboration with other libraries in the region, nation, and world. Fiscal shortages can not be used as an excuse to postpone imperative changes; money has to be found.  相似文献   

Analysis of a laminar-flow diffusional mixer for directed self-assembly of liposomes     

Matthew J. Kennedy  Harold D. Ladouceur  Tiffany Moeller  Dickson Kirui  Carl A. Batt 《Biomicrofluidics》2012,6(4)

The present work describes the operation and simulation of a microfluidic laminar-flow mixer. Diffusive mixing takes place between a core solution containing lipids in ethanol and a sheath solution containing aqueous buffer, leading to self assembly of liposomes. Present device architecture hydrodynamically focuses the lipid solution into a cylindrical core positioned at the center of a microfluidic channel of 125 × 125-μm² cross-section. Use of the device produces liposomes in the size range of 100–300 nm, with larger liposomes forming at greater ionic strength in the sheath solution and at lower lipid concentration in the core solution. Finite element simulations compute the concentration distributions of solutes at axial distances of greater than 100 channel widths. These simulations reduce computation time and enable computation at long axial distances by utilizing long hexahedral elements in the axial flow region and fine tetrahedral elements in the hydrodynamic focusing region. Present meshing technique is generally useful for simulation of long microfluidic channels and is fully implementable using comsol Multiphysics. Confocal microscopy provides experimental validation of the simulations using fluorescent solutions containing fluorescein or enhanced green fluorescent protein.  相似文献   

Book Review     

Carl Payton 《Journal of sports sciences》2013,31(1):113-114

Swimming Science V. E.B. Ungerechts, K. Wilke and K. Reischle (eds), Human Kinetics, Champaign, Ill., 1988 xiv+401 pp., $38.00 (hardback). ISBN 0 87322 108 7  相似文献   

A Comparison of Knowledge Obsolescence of Graduating Seniors and Practitioners in the Field of Physical Education     

E. James Kelley  Carl A. Lindsay 《Research quarterly for exercise and sport》2013,84(4):636-644

Abstract

The issue of defining and measuring professional obsolescence among physical educators is examined through a comparison of the current knowledge base of graduating physical education seniors and physical education practitioners in Pennsylvania. In a previous study, the “Inventory of Recent Knowledge in Physical Education,” a 260-item sample of current knowledge as defined by content experts was developed by the authors and administered by mail to the population of 2,737 male professional members of the public school districts' departments of physical education in Pennsylvania. In the present study, results from the first study were compared with those from an administration of the same instrument to 462 female and male physical education majors graduating from nine Pennsylvania higher education institutions. Both studies employed multiple-matrix procedures for item-person sampling and data analysis. An analysis of the results for both groups showed essentially similar performance profiles on the Inventory. Average scores of the two groups tended to be low and neither met preestablished minimum standards for defining up-to-date or nonobsolete performance. These results point to a clear conflict between what experts think up-to-date persons in the field of physical education should know and the knowledge performance of practitioners and students.  相似文献