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71.
ABSTRACT

We compared cardiometabolic demand and post-exercise enjoyment between continuous walking (CW) and time- and intensity-matched interval walking (IW) in insufficiently active adults. Sixteen individuals (13 females and three males, age 25.3 ± 11.1 years) completed one CW and one IW session lasting 30 min in a randomised-counterbalanced design. For CW, participants walked at a mean intensity of 65–70% predicted maximum heart rate (HRmax). For IW, participants alternated between 3 min at 80% HRmax and 2 min at 50% HRmax. Expired gas was measured throughout each protocol. Participants rated post-exercise enjoyment following each protocol. Mean HR and V˙O2 showed small positive differences in IW vs. CW (2, 95%CL 0, 4 beat.min?1; d = 0.23, 95%CL 0.06, 0.41 and 1.4, 95%CL 1.2 ml.kg?1.min?1, d = 0.36, 95%CL 0.05, 0.65, respectively). There was a medium positive difference in overall kcal expenditure in IW vs. CW (25, 95%CL 7 kcal, d = 0.58, 95%CL 0.33, 0.82). Post-exercise enjoyment was moderately greater following IW vs. CW (9.1, 95%CL 1.4, 16.8 AU, d = 0.62, 95%CL 0.06, 0.90), with 75% of participants reporting IW as more enjoyable. Interval walking elicits meaningfully greater energy expenditure and is more enjoyable than CW in insufficiently active, healthy adults.  相似文献   
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In this paper I argue that art is a search for meaning, and should be taught and learned in that context. The immediate goal is to understand ourselves and others better, allowing more intelligent and meaningful action in the arena of life. Toward that end, I suggest that the social agenda of art education, in a world that is both increasingly interdependent and turbulent, can be the construction of community through personal, group–centred, and cross–cultural understandings approached through art. I examine traditionalism, modernism, postmodernism, and contemporary visual culture for content and strategies to serve the purposes of art for life, and construct the outline of a model for instruction utilizing those concerns. Finally, I make a case that thematically mining and creating art works, performances, and visual culture for aesthetic significance that ultimately frames, forms and enhances meaning is the primary strategy for this construction of community, not in the tribal sense, but universally.  相似文献   
75.
Journal of Science Education and Technology - Complex systems are made up of many entities, whose interactions emerge into distinct collective patterns. Computational modeling platforms can provide...  相似文献   
76.
In this study, the fibers of invasive species Agave americana L. and Ricinus communis L. were successfully used for the first time as new sources to produce cytocompatible and highly crystalline cellulose nanofibers. Cellulose nanofibers were obtained by two methods, based on either alkaline or acid hydrolysis. The morphology, chemical composition, and crystallinity of the obtained materials were characterized by scanning electron microscopy(SEM) together with energy-dispersive X-ray spectroscopy(EDX), dynamic light scattering(DLS), X-ray diffraction(XRD), and Fourier transform infrared(FTIR)spectroscopy. The crystallinity indexes(CIs) of the cellulose nanofibers extracted from A. americana and R. communis were very high(94.1% and 92.7%, respectively). Biological studies evaluating the cytotoxic effects of the prepared cellulose nanofibers on human embryonic kidney 293 T(HEK293 T) cells were also performed. The nanofibers obtained using the two different extraction methods were all shown to be cytocompatible in the concentration range assayed(i.e., 0-500 μg/mL). Our results showed that the nanocellulose extracted from A. americana and R. communis fibers has high potential as a new renewable green source of highly crystalline cellulose-based cytocompatible nanomaterials for biomedical applications.  相似文献   
77.
International Journal for Educational and Vocational Guidance - Labour Market Information forms a central place in career practice and how individuals enact their careers. This paper makes use of...  相似文献   
78.
The questions that dominate the discourse of IT in education are mostly at the technical or craft levels. Visionary questions relating to the purpose of education and the proper place of technology are not much discussed. This paper seeks to undermine the idea that such questions should be avoided. The context of postmodernist change is described and two contrasting visions of education are discussed. Each vision is a hypothetical but recognisable representation of certain trends in educational thinking. Each vision has appeal but also severe shortcomings. The paper concludes that unless teachers, learners and communities can articulate their own visions of educational change, new technology could take them into a future that they would never willingly have chosen.  相似文献   
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This paper describes the evaluation of a local authority behaviour support initiative that involved the re-location of four behaviour support teachers from pupil referral units into three mainstream secondary schools to work with pupils at risk of exclusion. The evaluation was largely illuminative (Parlett, 1981) and focused on the effect of changing off-site behaviour support to in-school support. The research approach taken incorporated a Co-operative Inquiry strand (Heron, 1996) where researchers and behaviour support teachers worked together to design major aspects of the research process. This enabled research outcomes to inform educational practice, and gave a reflective, formative aspect to the study. The overall approach to the design of the study was informed by the Research and Development in Organisations (RADIO) model developed by Knight and Timmins (1995). The application of this approach in the context of the study is described along with a brief account of the findings. Finally, brief comment is made on the way in which the RADIO approach might contribute to educational psychologists' work at the local education authority and whole school levels.  相似文献   
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