Cardiovascular and ventilatory responses during formalized T'ai Chi Chuan exercise

T'ai Chi Chuan (TCC) is a widely practiced Chinese martial art said to physically develop balance and coordination as well as enhance emotional and mental health. TCC consists of a series of postures combined into a sequential movement providing a smooth, continuous, low-intensity activity. The purpose of this study was to examine the ventilatory and cardiovascular responses to the Long Form of Yang's style TCC. In addition, the subjects' TCC responses were compared to their ventilatory and cardiovascular responses during cycle ergometry at an oxygen consumption (VO2) equivalent to the mean TCC VO2. Six experienced (M = 8.3 yrs) male TCC practitioners served as subjects with data collected during the Cloud H and movement of the TCC exercise. Significantly (p less than .05) lower responses for ventilatory frequency (Vf) (11.3 and 15.7 breaths.min-1), ventilatory equivalent (VE/VO2) (23.47 and 27.41), and the ratio of dead space ventilation to tidal volume (VD/VT) (20 and 27%) were found in TCC in comparison to cycle ergometry. The percentage of minute ventilation used for alveolar ventilation was significantly higher during TCC (p less than .03) than cycle ergometry, with mean values of 81.1% and 73.1%, respectively. Cardiac output, stroke volume, and heart rate were not significantly different between TCC exercise and cycle ergometry at the same oxygen consumption. We concluded that, during TCC, expert practitioners show significantly different ventilatory responses leading to more efficient use of the ventilatory volume than would be expected from comparable levels of exertion on a cycle ergometer.     

Yer Doin’ it Wrong: How NOT to Interact with Vendors,Publishers, or Librarians

Three librarians who have extensive experience working in libraries or for publishers, vendors, or consortia presented an informal discussion on librarian–vendor relationships. The audience was encouraged to participate. Problems were articulated; speakers and audience members contributed suggestions for better approaches or behaviors when handling difficult situations.     

#MeToo,sexual harassment: an article,a forum,and a dream for the future

#MeToo has breathed new life into the women’s movement and especially into understanding and rectifying sexual harassment, abuse and assault. It has galvanized activists around the globe. And it has placed thousands of stories of the harassed in full view of the public. Sexual harassment, abuse and assault may occur within the organizational context or beyond; but sexual harassment, in particular has been legally labeled an organizational phenomenon. With this in mind, Robin Clair frames the early part of this article around the most recent organizational communication theories (see the appendix for an overview of these theories). Following the essay is a forum, in which invited scholars address questions related to the #MeToo movement.     

University students’ strategies and criteria during self-assessment: instructor’s feedback,rubrics, and year level effects

European Journal of Psychology of Education - This study explores the effects of feedback type, feedback occasion, and year level on student self-assessments in higher education. In total, 126...     

点燃思维之火：开放教育，长尾理论和学习2．0

高等教育需求和服务供给的矛盾为基于新技术的学习模式提供了空间.基于实践社区支持,强调参与、建构和兴趣驱动的社会化学习等非正式学习开始从边缘走向中心.本文讨论技术支持下的学习模式变革,强调整合社区支持和资源共享的重要性,从学习知识(Learn about)向学会生存(Learn to be)转变,并指出以资源共享为主的开放教育资源在社区支持方面的薄弱.开放教育资源的价值在学习的长尾中得到了揭示和体现,而建立社区与共享资源同样重要.通过建立参与性学习生态系统,推动从Web2.0发展到Learning2.0.     

The reliability of some VOSTS items when used with preservice secondary science teachers in England

A selection of Views on Science–Technology–Society (VOSTS) items was made and administered to a group of 29 postgraduate trainee science teachers. Two sections of VOSTS were addressed: VOSTS 1 (Defining Science and Technology) and VOSTS 9 (Epistemology). Reliability was determined by a cross-tabulation procedure following a retest. All 27 items selected were generally found to be reliable, although when put to a severe treatment, 24 of 27 items were found to be reliable. A cluster analysis of the responses was also carried out: Two main clusters were obtained for VOSTS 1 and three for VOSTS 9. The findings are discussed, compared with those from the Canadian study, and reviewed in the context of professional development of science teachers. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 53-71, 1998.