Effect of loading on peak power of the bar,body, and system during power cleans,squats, and jump squats     

Jeffrey M. McBride  Tracie L. Haines  Tyler J. Kirby 《Journal of sports sciences》2013,31(11):1215-1221

Abstract

Nine males (age 24.7 ± 2.1 years, height 175.3 ± 5.5 cm, body mass 80.8 ± 7.2 kg, power clean 1-RM 97.1 ± 6.36 kg, squat 1-RM = 138.3 ± 20.9 kg) participated in this study. On day 1, the participants performed a one-repetition maximum (1-RM) in the power clean and the squat. On days 2, 3, and 4, participants performed the power clean, squat or jump squat. Loading for the power clean ranged from 30% to 90% of the participant's power clean 1-RM and loading for the squat and jump squat ranged from 0% to 90% of the participant's squat 1-RM, all at 10% increments. Peak force, velocity, and power were calculated for the bar, body, and system (bar + body) for all power clean, squat, and jump squat trials. Results indicate that peak power for the bar, body, and system is differentially affected by load and movement pattern. When using the power clean, squat or jump squat for training, the optimal load in each exercise may vary. Throwing athletes or weightlifters may be most concerned with bar power, but jumpers or sprinters may be more concerned with body or system power. Thus, the exercise type and load vary according to the desired stimulus.  相似文献   

Exploring the relationship between school discipline referrals and delinquency     

Jeffery Sprague  Hill M. Walker  Steve Stieber  Brandi Simonsen  Vicki Nishioka  Linda Wagner 《Psychology in the schools》2001,38(2):197-206

There is a growing concern about violent and destructive behaviors of youth that require intervention by juvenile justice and youth‐serving agencies. This concern has led many to conclude that schools and community agencies must increase efforts to prevent juvenile delinquency and to provide programs that will facilitate rehabilitation, education, and vocational training for youth already involved. A clear understanding of the nature and range of behaviors that result in juvenile crime is needed in order to develop programs and interventions that can be expected to lead to beneficial changes for youth and for society as a whole. The purpose of this article is to describe the relationship between school behaviors and youth characteristics in school (e.g., discipline referrals, teacher nominations, nomothetic ratings) and referrals to juvenile authorities (e.g., illegal behaviors). We describe a strategy of using teacher nominations, school discipline referrals, and community arrest data to predict delinquent and violent behavior in youth. We outline data from a group of socially maladjusted middle school youth to illustrate the relationship between the two data sources and recommendations for identification and treatment of youth at risk for delinquency and antisocial behavior. © 2001 John Wiley & Sons, Inc.  相似文献   

Physical discipline and children's adjustment: cultural normativeness as a moderator   总被引：2，自引：0，他引：2  

Lansford JE  Chang L  Dodge KA  Malone PS  Oburu P  Palmérus K  Bacchini D  Pastorelli C  Bombi AS  Zelli A  Tapanya S  Chaudhary N  Deater-Deckard K  Manke B  Quinn N 《Child development》2005,76(6):1234-1246

Interviews were conducted with 336 mother-child dyads (children's ages ranged from 6 to 17 years; mothers' ages ranged from 20 to 59 years) in China, India, Italy, Kenya, the Philippines, and Thailand to examine whether normativeness of physical discipline moderates the link between mothers' use of physical discipline and children's adjustment. Multilevel regression analyses revealed that physical discipline was less strongly associated with adverse child outcomes in conditions of greater perceived normativeness, but physical discipline was also associated with more adverse outcomes regardless of its perceived normativeness. Countries with the lowest use of physical discipline showed the strongest association between mothers' use and children's behavior problems, but in all countries higher use of physical discipline was associated with more aggression and anxiety.  相似文献   

Planning for the Internationalization of a Postgraduate Professional Degree Programme in Library and Information Science     

Vicki L. Gregory  Sonia Ramírez Wohlmuth 《Higher Education in Europe》2002,27(3):261-268

The School of Library and Information Science of the University of South Florida, that has been a pioneer in distance education, has decided to internationalize its offerings with Ibero-America in mind. This article describes some of the steps the School has taken in order to prepare itself for the challenges, particularly cultural and linguistic ones, posed by international students. Given that the level of performance of both traditional and distance students seems to be about identical, the School of Library and Information Service is looking forward to a successful and culturally enriching experience.  相似文献   

Professional storytelling in clinical dental anatomy teaching     

Jules Kieser  Vicki Livingstone  Alison Meldrum 《Anatomical sciences education》2008,1(2):84-89

The aim of the present work was to see if storytelling in a clinical dental anatomy course would increase student satisfaction. We enhanced teaching by spontaneous storytelling in problem‐based learning, in half of the third‐year dentistry class. At the end of the course, we administered an anonymous questionnaire to the students in the class, consisting of 12 questions that students had to answer on a Likert scale of 1–5. An overall satisfaction score was obtained and we used a linear mixed model to compare differences in satisfaction between the two groups, with “group” as the fixed effect. We also conducted an exploratory factor analysis of the responses to investigate whether there were distinct constructs within the data. Overall satisfaction is high, with students “with stories” having higher satisfaction than those “without stories.” The former group consistently gives higher satisfaction scores, regardless of which question is being asked. Factor analysis provides evidence that storytelling nurtures reflective learning, while students work on their clinical anatomy problems. Anat Sci Ed 1:84–89, 2008. © 2008 American Association of Anatomists.  相似文献   

Assessment matters: Moving beyond surveys     

Vicki L. Wise  Mary Ann Barham 《About Campus》2012,17(2):26-29

Do our students have survey burnout? Vicki L. Wise and Mary Ann Barham share their suggestions for encouraging student engagement in the assessment process and increasing the validity of the data collected as we do so.  相似文献   

Associations Between Child Disabilities and Caregiver Discipline and Violence in Low‐ and Middle‐Income Countries     

Charlene Hendricks  Jennifer E. Lansford  Kirby Deater‐Deckard  Marc H. Bornstein 《Child development》2014,85(2):513-531

Using nationally representative samples of 45,964 two‐ to nine‐year‐old children and their primary caregivers in 17 developing countries, this study examined the relations between children's cognitive, language, sensory, and motor disabilities and caregivers' use of discipline and violence. Primary caregivers reported on their child's disabilities and whether they or anyone in their household had used nonviolent discipline, psychological aggression, and physical violence toward the target child and believed that using corporal punishment is necessary. Logistic regression analyses supported the hypothesis that children with disabilities are treated more harshly than children without disabilities. The findings suggest that policies and interventions are needed to work toward the United Nations' goals of ensuring that children with disabilities are protected from abuse and violence.  相似文献   

General Mass Communication     

Jack Temple Kirby  Dan Nimmo  Raymond G. Smith  Fred Fedler  Rolf Myller  William E. Francois 《Communication Booknotes Quarterly》2013,44(11):180-184

Jack Temple Kirby's Media-Made Dixie: The South in the American Imagination. (Baton Rouge, La.: Louisiana State University Press, 1978—$9.95)

Dan Nimmo's Political Communication and Public Opinion in America (Santa Monica, Calif.: Goodyear Publishing Co., 1978—price not given, but available in hard and paper editions)

Raymond G. Smith's The Message Measurement Inventory: A Profile for Communication Analysis (Bloomington, Ind.: Indiana University Press, 1978—$12.50)

Fred Fedler's An Introduction to the Mass Media (New York: Harcourt, Brace Jovanovich, 1978—price not given, paper)

Rolf Myller's Symbols and their Meaning (New York: Atheneum, 1978—$9.95)

William E. Francois, Mass Media Law and Regulation (Columbus, Ohio: Grid, Inc., 1978—price not given)

James Leigh and Claude R. Martin, Jr., Current Issues and Research in Advertising (Ann Arbor, Mich.: Graduate School of Business Administration, University of Michigan, 1978—$4.75, paper)

Philip Ward Burton's Advertising Copywriting (Columbus, Ohio: Grid, 1978—$12.95)

Postal and Allied Arenas–Research Task Specifications, Phase I: Arena Survey by John F. McLaughlin (October 1977, 39 pp., $10.90, paper, Working Paper W-77-9)

The Communications Act Policy Toward Competition: A Failure to Communicate by G. Hamilton Loeb (October 1977, 95 pp., $23.40, paper, Publication P-77-3)

Roland E. Wolseley's Careers in Religious Communications (Herald Press, Scottdale, Pa. 15683—$4.95, paper)

Roland Barthes' Image-Music- Text (New York: Hill & Wang, 1977—$8.95)

Jacques Barzun and Henry F. Graff's The Modern Researcher (New York: Harcourt Brace Jovanovich, 1977—$6.95 in paper, and also available in hardback)  相似文献   

Factors affecting the adoption of social network sites: examining four adopter categories of Singapore's working adults     

Trisha T.C. Lin  Vicki C.H. Chiu  Wendy Lim 《亚洲交流杂志》2013,23(3):221-242

Adapted from Chang et al.'s (2006) models, this study examines factors that influence adoption and non-adoption of social network sites (SNS) in adopters (Continuers, Discontinuers) and non-adopters (Potentials, Resistors). Chi-square and t-test were used to analyze the survey data of Singapore's working adults and Internet users (N =222). The findings reveal innovation characteristics (relative advantage, compatibility, complexity) and perceived popularity differ significantly in three pairs of adopter categories. Results show Continuers and Potentials are concerned more about image than Discontinuers and Resistors, while technology cluster differs between adopter vs. non-adopter and Continuers vs. Discontinuers. Moreover, the study suggests younger people tend to adopt SNSs, females continue to use SNSs more, and potential SNS users are more innovative. Lastly, a regression model to forecast the adoption of SNSs is proposed in which age, compatibility, technology cluster, and perceived popularity are predictors.  相似文献   

Using Decision Tree Analysis to Understand Foundation Science Student Performance. Insight Gained at One South African University     

Nicola Frances Kirby  Edith Roslyn Dempster 《International Journal of Science Education》2013,35(17):2825-2847

The Foundation Programme of the Centre for Science Access at the University of KwaZulu-Natal, South Africa provides access to tertiary science studies to educationally disadvantaged students who do not meet formal faculty entrance requirements. The low number of students proceeding from the programme into mainstream is of concern, particularly given the national imperative to increase participation and levels of performance in tertiary-level science. An attempt was made to understand foundation student performance in a campus of this university, with the view to identifying challenges and opportunities for remediation in the curriculum and processes of selection into the programme. A classification and regression tree analysis was used to identify which variables best described student performance. The explanatory variables included biographical and school-history data, performance in selection tests, and socio-economic data pertaining to their year in the programme. The results illustrate the prognostic reliability of the model used to select students, raise concerns about the inefficiency of school performance indicators as a measure of students' academic potential in the Foundation Programme, and highlight the importance of accommodation arrangements and financial support for student success in their access year.  相似文献