清朝官营茶马贸易的衰亡

茶马贸易拥有悠久的历史。基于行为角度的研究,官营茶马贸易在清雍正年间走向衰弱,衰弱的原因和私茶竞争、西北地区地缘形势的改变以及茶马贸易制度等相关。茶马贸易经济行为虽然衰弱了,但茶马贸易中的思想却没有停止,在其它地区的贸易中得以延续。     

Health Status as a Mediating Factor in the Life Change-Academic Performance Relationship

Abstract

This study was designed to determine whether illness during the academic year, when gender and academic readiness are controlled, is the variable accounting for the demonstrated relationship between life change index and subsequent academic performance. A weak though significant inverse association was found between life change and grades: this association persisted even after statistical adjustment for gender, academic readiness, and illness experience. There was no evidence that illness experience mediated the life change-performance relationship. The association was not subject to a threshold effect according to level of life change.     

Looking beyond the academic and developmental logics in kindergarten education: the role of Schwab's commonplaces in classroom-based research

Kindergarten has become increasingly academic in nature. One of the primary dilemmas arising from this shift is the tension between the use of developmentally appropriate practices and the obligation to teach academic standards. To gain a deeper understanding of how kindergarten is enacted in the evolving curricular landscape, we look beyond these competing perspectives to develop a theoretical framework informed by Schwab's conception of the eclectic and the four commonplaces. We re-envision the four commonplaces – subject matter, teacher, milieu, and learner – to align them with contemporary conceptions of educational purposes, practical theory, classroom climate, and childhood. Acknowledging that kindergarten is an eclectic space, we create a robust theoretical framework for researchers interested in classroom research. The application of this framework is explored using an ethnographic methodology that integrates data from classroom observations, teacher interviews, and photo elicitation interviews with the students in one kindergarten classroom.     

The Community-Based Academic Radiologist

As academic radiology practices expand into the community, the lines that have historically distinguished the academic from private practice radiologist are becoming increasingly blurred. In this article, we introduce the new concept of the community-based academic radiologist and address some of the unique challenges and opportunities faced by these radiologists navigating this new hybrid role of academician and radiologist in community-based private practice.     

Influence of a 2‐ to 6‐year physical education intervention on scholastic performance: The CHAMPS study‐DK

The aim of this study was to investigate the influence of a school‐based intervention with a tripling of physical education (PE ) lessons from two (90 minutes) to six lessons per week (270 minutes) on scholastic performance. This study is part of the CHAMPS study‐DK , a quasi‐experimental study that began in 2008. The intervention group consisted of six schools, and the control group consisted of four matched schools (mean age at baseline=8.4 years, kindergarten class fourth grade). Academic performance was extracted from the national test system from 2010 to 2014 (Math and Danish were measured at third and sixth, and second, fourth and sixth grades, respectively). Participants included 1888 students participating in at least one scholastic performance test. Linear mixed models were applied to test for differences between groups and adjusted for known confounders. No significant differences were observed between groups in the academic performance tests (control group reference); Danish second grade β=−1.34 (95% CI −9.90, 7.22), fourth grade β=0.22 (95% CI −6.12, 6.56), sixth grade β=1.03 (95% CI −5.02, 7.08), and all grades combined β=0.28 (95% CI −5.74, 6.31) and Math third grade β=−2.87 (95% CI −9.65, 3.90), sixth grade β=0.99 (95% CI −7.36, 9.34) and combined β=−1.20 (95% CI −8.10, 5.71). In conclusion, no significant differences were observed between intervention and control schools for scholastic performance. Importantly, there were no negative effects of additional PE on scholastic outcomes, despite more PE and longer school days for intervention children.