Sexual dimorphism in bone–muscle relationship in young adults     

Vera Zymbal  Kathleen F. Janz  Fátima Baptista 《Journal of sports sciences》2017,35(24):2433-2438

The purpose of this study was to analyse associations between lean soft tissue (LST), a surrogate of skeletal muscle mass and key fracture-related geometric characteristics of the proximal femur. Moreover, we examined the role that muscle played on the proximal femur geometry in response to physical activity (PA). Participants were 83 young adults. Leg LST (exposure) was assessed by dual energy X-ray absorptiometry (DXA). Proximal femur geometry was derived from a left hip DXA scan. Geometric variables (outcomes) included the femoral neck axis length (FNAL), the femoral neck width (FNW), the neck–shaft angle and FNW|FNAL (an index of robustness). PA was evaluated by accelerometry. Linear regression was used to analyse relationships. Additional exposure variables included body height and mass. In males, leg LST explained 17.4% of variation in FNAL (P < 0.001) and 15% in FNW (P = 0.015). In females, it explained 8.8% of the variance in FNAL (P = 0.020). Associations remained significant in males, but not in females, when vigorous PA was added to the models. These results suggest that public health approaches to promote PA may be particularly important in females since vigorous PA seems to convey advantages in femur geometry and consequently in bone strength.  相似文献   

Validating Automated Measures of Text Complexity          下载免费PDF全文

Kathleen M. Sheehan 《Educational Measurement》2017,36(4):35-43

Automated text complexity measurement tools (also called readability metrics) have been proposed as a way to help teachers, textbook publishers, and assessment developers select texts that are closely aligned with the new, more demanding text complexity expectations specified in the Common Core State Standards. This article examines a critical element of the validity arguments presented in support of proposed metrics: the claim that criterion text complexity scores developed from students’ responses to reading comprehension test items are reflective of the difficulties actually experienced by students while reading. Evidence that fails to support this assertion is examined, and implications relative to the goal of obtaining valid, unbiased evidence about the measurement properties of proposed readability metrics are discussed.  相似文献   

Effects of an Early Family Intervention on Children's Memory: The Mediating Effects of Cortisol Levels     

Daphne Blunt Bugental  Alex Schwartz  Colleen Lynch 《Mind, Brain, and Education》2010,4(4):159-170

Developmental psychologists have long been concerned with the ways that early adversity influences children's long-term outcomes. In the current study, activity of the hypothalamic–pituitary–adrenal axis of medically at-risk (e.g., preterm) infants was measured as a result of maternal participation in a novel cognitively based home visitation program (versus a Healthy Start home visitation program). Maternal participation in the cognitive intervention predicted lower basal cortisol levels among infants—with reduced levels of maternal avoidance/withdrawal serving as a mediator of this relation. Lower cortisol levels in infancy, in turn, predicted higher verbal short-term memory (STM) at age 3. STM represents a cognitive ability that has importance for children's later educational outcomes. Findings provide experimental evidence concerning the pathway by which an early intervention may produce hormonal changes that can, in turn, influence children's learning outcomes.  相似文献   

Writing for Social Scientists: How to Start and Finish Tour Thesis,Book, or Article.     

Sharon ABBEY Bev BAILEY  Jane Dubrick  Kathleen Moore  Joyce Nyhof-YOUNG  Erminia Pedretti  Ron Saranchuk 《International journal of qualitative studies in education》2013,26(1):101-102

Underlined by the belief that teachers' critical awareness of their actions is a vital issue in education, this study examines the insights that evolved from a long-term collaboration among seven doctoral students. To prepare for our comprehensive examinations, we collaborated as a study group for one and one-half years. Adopting the dual roles of listener-researcher and narrator-participant, we engaged in dialogue and narrative to convey to each other the meaning of our collaborative experiences. From grounded theory analysis, four elements of collaboration emerged: logistics, social dynamics, empowerment, and change. In order to convey the meaning of our experiences, we create a multiplicity of meanings based on our diverse and lived personal narratives. Finally, our collaborative process challenges academic administrations to examine how well their current policies encourage personal autonomy and cooperative learning approaches for students involved in preparing for their comprehensive examinations.  相似文献   

TEACHING GERONTOLOGY VIA DISTANCE EDUCATION: VARIETY IS THE KEY TO SUCCESS     

Kathleen W. Piercy 《Educational gerontology》2013,39(7):665-675

Teaching gerontology via distance education is growing in popularity. Yet, many challenges are encountered by those teaching gerontology at a distance; some technological and others pedagogical in nature. Successful strategies for structuring and teaching televised gerontology courses are presented in this paper. Strategies focus on types of teacher preparation, use of pedagogical tools, development and maintenance of rapport with students at remote sites, and ways to improve teaching of distance education classes in gerontology. It is argued that workload and compensation for instructors teaching distance education need to be addressed by administration in order to develop high quality distance education programs.  相似文献   

Student teacher portfolios: A portrait of the beginning teacher     

Kathleen Montgomery 《The Teacher Educator》2013,48(4):216-225

Abstract

This article describes a student teacher portfolio for use as an interviewing tool. A review of the research on hiring practices indicated that prospective employers reviewed the following competencies of teacher candidates: planning skills, classroom management philosophy, reflective abilities, knowledge of appropriate assessment methods, and the initiative to do more than is expected. Therefore, the recommended sections of the student teacher portfolio are Self‐Assessment; Philosophy of Classroom Management; Planning, Implementation, and Assessment Skills; and Special Projects and Activities. Because prospective employers indicated that they would devote limited time to reading a portfolio, student teachers are instructed to make all sections only six to eight pages long. Professionally arranged appendixes can then be used to provide the employer with specific evidence for claims made in the main body of the portfolio.  相似文献   

论知识管理与图书馆在知识管理过程中的社会功用     

杨文祥  贝弗莉 P·林奇 《图书馆》2007,(6):7-12

在当今信息-知识时代迅速发展和非连续性变化的社会环境中，一切社会群体、组织和个人只有持续不断地进行知识生成和创新、实现自我超越才能适应这一环境，赢得社会竞争优势和生存与发展的机会。知识管理就是这样一个通过对相关信息和知识资源充分开发利用而实现的一个组织知识的知识生成管理、组织知识管理和社会知识管理三个层次。图书馆在知识管理的三层结构中具有不可替代的重要社会功用。  相似文献   

Public access to government information: Issues,trends, and strategies: By Peter Hernon and Charles R. McClure Norwood,N.J.: Ablex Publishing, 1984, 457 pages, $49.50 (cloth), $25.00 (paper). ISBN 0-89391-252-2 (cloth). ISBN 0-89391-100-3 (paper). LC 83-25797.     

Kathleen M. Heim 《Government Information Quarterly》1984,1(4):463-465

  相似文献   

INTERDISCIPLINARY RESEARCH EDUCATION IN COMMUNICATION AND SOCIAL INTERACTION AMONG HEALTHY OLDER ADULTS     

Charles T. Scialfa  Kathleen Pichora-Fuller  Pat Spadafora 《Educational gerontology》2013,39(9):733-750

An innovative gerontology education program was developed to advance research on aging that is interdisciplinary and promotes the translation of knowledge from lab to life. The program focuses on communication and social interaction in healthy aging. It brings together faculty mentors, graduate students, and post-doctoral fellows from six different postsecondary institutions in Canada. The program unifies basic laboratory research in hearing, vision, and cognition with applied research in audiology, biomedical engineering, optometry, psychology, speech-language pathology, human factors, and social work. The design, implementation, and evaluation of the first year of the program are described and future directions are suggested.  相似文献   

What Is Motor Development?     

Kathleen Williams 《Quest (Human Kinetics)》2013,65(3):179-182

  相似文献