The Medical Library of the South African Institute for Medical Research     

Gear AJ 《Bulletin of the Medical Library Association》1942,30(5):461-463

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Mexican-Origin Youth's Cultural Orientations and Adjustment: Changes From Early to Late Adolescence     

KA Updegraff  AJ Umaña-Taylor  SM McHale  LA Wheeler  NJ Perez-Brena 《Child development》2012,83(5):1655-1671

Drawing from developmental and cultural adaptation perspectives and using a longitudinal design, this study examined: (a) mean‐level changes in Mexican‐origin adolescents’ cultural orientations and adjustment from early to late adolescence and (b) bidirectional associations between cultural orientations and adjustment using a cross‐lag panel model. Participants included 246 Mexican‐origin, predominantly immigrant families that participated in home interviews and a series of nightly phone calls when target adolescents were 12 and 18 years of age. Girls exhibited more pronounced declines in traditional gender role attitudes than did boys, and all youth declined in familism values, time spent with family, and involvement in Mexican culture. Bidirectional relations between cultural orientations and adjustment emerged, and some associations were moderated by adolescent nativity and gender.  相似文献   

Developing and sustaining a web-based library newsletter     

Frisby AJ  Kipnis DG  Mikita EG 《Medical reference services quarterly》2006,25(1):17-25

The JEFFLINE Forum, Scott Library's attempt to revive the traditional library newsletter by employing the technical advantages and increasing presence of the Web, debuted in October 1999. The fifth anniversary of the Forum was a good time to look back at its evolution and to examine some of the challenges inherent in developing and sustaining a library newsletter. By identifying the most successful strategies, and reflecting on the lessons learned along way, the authors hope to continue the evolution of the Forum and help to ensure the viability of the library newsletter.  相似文献   

The Better Beginnings, Better Futures project: findings from grade 3 to grade 9     

Peters RD  Bradshaw AJ  Petrunka K  Nelson G  Herry Y  Craig WM  Arnold R  Parker KC  Khan SR  Hoch JS  Pancer SM  Loomis C  Bélanger JM  Evers S  Maltais C  Thompson K  Rossiter MD 《Monographs of the Society for Research in Child Development》2010,75(3):vii-viii, 1-174

Although comprehensive and ecological approaches to early childhood prevention are commonly advocated, there are few examples of long-term follow-up of such programs. In this monograph, we investigate the medium- and long-term effects of an ecological, community-based prevention project for primary school children and families living in three economically disadvantaged neighborhoods in Ontario, Canada. The Better Beginnings, Better Futures (BBBF) project is one of the most ambitious Canadian research projects on the long-term impacts of early childhood prevention programming to date. Bronfenbrenner's ecological model of human development informed program planning, implementation, and evaluation. Using a quasi-experimental design, the BBBF longitudinal research study involved 601 children and their families who participated in BBBF programs when children were between 4 and 8 years old and 358 children and their families from sociodemographically matched comparison communities. We collected extensive child, parent, family, and community outcome data when children were in Grade 3 (age 8–9), Grade 6 (age 11–12), and Grade 9 (age 14–15). The BBBF mandate was to develop programs that would positively impact all areas of child's development; our findings reflect this ecological approach. We found marked positive effects in social and school functioning domains in Grades 6 and 9 and evidence of fewer emotional and behavioral problems in school across the three grades. Parents from BBBF sites reported greater feelings of social support and more positive ratings of marital satisfaction and general family functioning, especially at the Grade 9 follow-up. Positive neighborhood-level effects were also evident. Economic analyses at Grade 9 showed BBBF participation was associated with government savings of $912 per child. These findings provide evidence that an affordable, ecological, community-based prevention program can promote long-term development of children living in disadvantaged neighborhoods and produce monetary benefits to government as soon as 7 years after program completion.  相似文献   

Submaximal expression of the bilateral deficit     

McLean SP  Vint PF  Stember AJ 《Research quarterly for exercise and sport》2006,77(3):340-350

Thirty-six participants performed bilateral and unilateral isometric elbow flexion trials at what they perceived to be 100, 75, 50, and 25% of maximal effort. Absolute bilateral deficits ranged from--16% at 25% effort to--10% at 100% effort. The deficit included a component independent of consciousness and a component inversely related to intensity attributable to perceptual differences between unilateral and bilateral tasks. Forty-two participants performed bilateral and unilateral isometric elbow flexion trials at 100, 80, 60, 40, and 20% of maximal effort. Perception of effort in submaximal bilateral trials was consistently and significantly higher (5.5-9.6%) than corresponding unilateral trials. These data suggest that the bilateral deficit exists at submaximal levels of effort and is based on perceptual and physiological components.  相似文献   

Stability of elite freestyle performance from childhood to adulthood     

Costa MJ  Marinho DA  Bragada JA  Silva AJ  Barbosa TM 《Journal of sports sciences》2011,29(11):1183-1189

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Fluid balance of elite Brazilian youth soccer players during consecutive days of training     

Silva RP  Mündel T  Natali AJ  Bara Filho MG  Lima JR  Alfenas RC  Lopes PR  Belfort FG  Marins JC 《Journal of sports sciences》2011,29(7):725-732

In this study we investigated pre-training hydration status, fluid intake, and sweat loss in 20 elite male Brazilian adolescent soccer players (mean?±?s: age 17.2?±?0.5 years; height 1.76?±?0.05?m; body mass 69.9?±?6.0?kg) on three consecutive days of typical training during the qualifying phase of the national soccer league. Urine specific gravity (USG) and body mass changes were evaluated before and after training sessions to estimate hydration status. Players began the days of training mildly hypohydrated (USG?>?1.020) and fluid intake did not match fluid losses. It was warmer on Day 1 (33.1?±?2.4°C and43.4?±?3.2% relative humidity; P?相似文献   

文化浸润,品自芬芳--学校基础文明养成教育初探     

高天韵  张利军 《教育科研论坛》2009,(6):4-5

教育的本意是“引出”。引出什么？引出人性的善良、人潜在的能力。用什么引出？——文化。文化最具打动人心灵的特点。文化最能导引社会向上，唤起多数人感恩、怜悯、慈爱的善良本性。所以说，文化也是教育。教育也是文化，两者本为一物。  相似文献   

Functional data analysis of joint coordination in the development of vertical jump performance   总被引：1，自引：0，他引：1  

Harrison AJ  Ryan W  Hayes K 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):199-214

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Identifying the optimal resistive load for complex training in male rugby players     

Comyns TM  Harrison AJ  Hennessy L  Jensen RL 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(1):59-70

Alternating a resistance exercise with a plyometric exercise is referred to as "complex training". In this study, we examined the effect of various resistive loads on the biomechanics of performance of a fast stretch-shortening cycle activity to determine if an optimal resistive load exists for complex training. Twelve elite rugby players performed three drop jumps before and after three back squat resistive loads of 65%, 80%, and 93% of a single repetition maximum (1-RM) load. All drop jumps were performed on a specially constructed sledge and force platform apparatus. Flight time, ground contact time, peak ground reaction force, reactive strength index, and leg stiffness were the dependent variables. Repeated-measures analysis of variance found that all resistive loads reduced (P < 0.01) flight time, and that lifting at the 93% load resulted in an improvement (P < 0.05) in ground contact time and leg stiffness. From a training perspective, the results indicate that the heavy lifting will encourage the fast stretch-shortening cycle activity to be performed with a stiffer leg spring action, which in turn may benefit performance. However, it is unknown if these acute changes will produce any long-term adaptations to muscle function.  相似文献