OSTMED.DR®, an Osteopathic Medicine Digital Library     

Lori Fitterling  Elaine Powers  Emily Vardell 《Medical reference services quarterly》2018,37(1):74-80

The OSTMED.DR® database provides access to both citation and full-text osteopathic literature, including the Journal of the American Osteopathic Association. Currently, it is a free database searchable using basic and advanced search features.  相似文献   

Increasing hip and knee flexion during a drop-jump task reduces tibiofemoral shear and compressive forces: implications for ACL injury prevention training     

Liang-Ching Tsai  Yi-An Ko  Kyle E. Hammond  John W. Xerogeanes  Gordon L. Warren  Christopher M. Powers 《Journal of sports sciences》2017,35(24):2405-2411

Although most ACL injury prevention programmes encourage greater hip and knee flexion during landing, it remains unknown how this technique influences tibiofemoral joint forces. We examined whether a landing strategy utilising greater hip and knee flexion decreases tibiofemoral anterior shear and compression. Twelve healthy women (25.9 ± 3.5 years) performed a drop-jump task before and after a training session (10–15 min) that emphasised greater hip and knee flexion. Peak tibiofemoral anterior shear and compressive forces were calculated using an electromyography (EMG)-driven knee model that incorporated joint kinematics, EMG and participant-specific muscle volumes and patella tendon orientation measured using magnetic resonance imaging (MRI). Participants demonstrated a decrease in peak anterior tibial shear forces (11.1 ± 3.3 vs. 9.6 ± 2.7 N · kg^?1; P = 0.008) and peak tibiofemoral compressive forces (68.4 ± 7.6 vs. 62.0 ± 5.5 N · kg^?1; P = 0.015) post-training. The decreased peak anterior tibial shear was accompanied by a decrease in the quadriceps anterior shear force, while the decreased peak compressive force was accompanied by decreased ground reaction force and hamstring forces. Our data provide justification for injury prevention programmes that encourage greater hip and knee flexion during landing to reduce tibiofemoral joint loading.  相似文献   

The presentation of statistical information     

Gloria D. Feliciano  Richard D. Powers  Bryant E. Kearl 《Educational technology research and development : ETR & D》1963,11(3):32-39

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Effects of Applying Different Time Limits to a Proposed GRE Writing Test     

Donald E. Powers  Mary E. Fowles 《Journal of Educational Measurement》1996,33(4):433-452

In order to determine the role of time limits on both test performance and test validity, we asked approximately 300 volunteers–prospective graduate students–to each write two essays–one in a 40-minute time period and the other in 60 minutes. Analyses revealed that, on average, test performance was significantly better when examinees were given 60 minutes instead of 40. However, there was no interaction between test-taking style (fast vs. slow) and time limits. 'That is', examinees who described themselves as slow writers/test takers did not benefit any more (or any less) from generous time limits than did their quicker counterparts. In addition, there was no detectable effect of different time limits on the meaning of essay scores, as suggested by their relationship to several nontest indicators of writing ability.  相似文献   

The maltreatment of adolescents   总被引：2，自引：0，他引：2  

J L Powers  J Eckenrode 《Child abuse & neglect》1988,12(2):189-199

Official reports of maltreatment involving adolescent victims were compared to those involving younger children in a representative sample of protective services' reports drawn from New York State in 1985. Specific case characteristics, including age, gender, ethnicity of the victim, and source of report, are described and their relation to case substantiation is examined. Analyses revealed that adolescents represent a substantial proportion of all victims of official child maltreatment reports. The impact of age on substantiation varied as a function of the type of maltreatment, where for adolescents sexual abuse reports were more likely to be substantiated, while neglect and physical abuse reports were less likely to be substantiated. Reports involving adolescents were significantly more likely to involve a female victim. Significant gender differences in substantiation rate were found only for sexual abuse reports involving adolescents. White children were also found to be under-represented in this sample, while blacks were over-represented relative to their numbers in the population. The impact of minority status on substantiation was significant for neglect and physical abuse reports involving children. The majority of adolescent reports came from mandated sources, which had a significantly higher substantiation rate than reports from non-mandated sources.  相似文献   

Building a Successful Adult Life: Findings From Youth-Directed Research     

Laurie E. Powers  Tracee Garner  Betsy Valnes  Peter Squire  Alison Turner  Todd Couture 《Exceptionality》2013,21(1):45-56

Abstract

Although transition outcomes for youth with disabilities have shown some improvement and transition support practices have been identified, many young people continue to face transition barriers that preclude their full participation in key adult life activities. While research efforts have largely been professionally driven, there is emerging literature suggesting that the use of participatory, empowerment methodologies may bolster the identification of appropriate research methods and useful solutions to problems, as well as promoting the application of findings to accomplishing practice and policy improvements. The purpose of this study was to use a youth-directed, participatory action methodology to investigate youths' perceptions of the value of transition promotion experiences identified as effective by professionals, and to examine the level at which youth with disabilities participate in those experiences. A survey was developed and administered to 202 young people with disabilities by leaders from the National Youth Leadership Network. Findings indicated that youth generally endorse the importance of validated transition promotion practices; however, they reported having limited opportunity to participate in them. Implications related to the use of participatory action methodologies and needed practice and policy improvements are discussed.  相似文献   

Doing a computer-based demonstration? There may be a better way     

Robin Peek  Assistant Professor  Allison Powers  Head of Cataloging 《The Journal of Academic Librarianship》1995,21(6)

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Job Demands and Resources Experienced by the Early Childhood Education Workforce Serving High-Need Populations     

Farewell  Charlotte V.  Quinlan  Jennie  Melnick  Emily  Powers  Jamie  Puma  Jini 《Early Childhood Education Journal》2022,50(2):197-206

Early Childhood Education Journal - The early childhood education (ECE) workforce plays a key role in promoting early childhood development by their interactions with young children during...  相似文献   

Does presentation method influence film learning?     

Philip C. Minier  Fritz A. Albert  Richard D. Powers 《Educational technology research and development : ETR & D》1961,9(4):195-200

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Forgotten History: Mexican American School Segregation in Arizona from 1900–1951 1     

Jeanne M. Powers 《Equity & Excellence in Education》2013,46(4):467-481

This article documents the efforts by Mexican Americans to challenge school segregation in Arizona in the first half of the twentieth century. As in Texas and California, although state law never formally mandated the segregation of Mexican American students, school districts in Arizona often established separate “Mexican Schools” for Mexican American students. While districts argued that segregation was necessary because of students' poor English skills, the segregation of Mexican American students in Arizona's public schools was not an isolated practice but occurred in tandem with other discriminatory practices that restricted the social rights of Mexican Americans, many of whom were American citizens. However, Mexican Americans challenged segregation in the courts. Notably, in Gonzales v. Sheely, a case heard in the United States District Court of Arizona in 1950, Judge Dave Ling declared segregation unconstitutional over three years before the Supreme Court's historic decision in Brown v. Board (1954).  相似文献