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스마트교육과 SNS를 활용한 체육수업 활성화 방안 연구
최종환, 서경원 忠北大學校 平生體育硏究所 2013 平生體育硏究所 論文集 Vol.25 No.-
This study aims to investigate educational uses through smart education and SNS and seek ways to incorporate them into physical education (PE) classes. Modern society has brought changes regarding communication, formation of relationships, and life styles due to information technology development and the wide spread of smartphones. In the center, there is Social Network Service (SNS) through which the uses and values are gradually increasing around the world. This social changes also brought about smart education in school education for the needs of diverse educational demand. Smart education redefined educational systems in terms of contents, methods, evaluation, environment, etc. by effectively utilizing it into school education because it overcomes the environmental and physical limitations using network resources based on information technology. It is changing educational paradigms in the 21st century which seeks to develop and foster students' abilities so that every student is able to study according to their level and become a global leader. The results of the study on ways to activate PE classes through smart education and SNS showed the following. First, smart education in PE classes is the challenge that needs to be applied in future educational methods. Second, smart education and SNS-based instructions introduced a new learning environment and broadened PE classes. Third, smart education and SNS-based instructions show some educational effects of developing social skills through students' academic achievement, satisfaction in classes, interest, self-esteem, and cooperative learning. Fourth, it is essential to develop a variety of contents to apply to PE classes. Fifth, it is necessary to educate teachers about smart education and the uses of SNS.
김도일,정경환,김종호,서곤 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-
Dealkylation of m-diisopropylbenzene (m-DIPB) was studied on various zeolite catalysts which have different pore structures. The very low dealkylation activity was observed on MFI zeolite because of its small pore size. The m-DIPB low conversions of MOR and FAU zeolites were due to severe deactivation of the catalysts by carbon deposites. On the other hand, the high conversion and the low deactivation in the m-DIPB dealkylation were observed on BEA zeolite with bent pores and MWW zeolite with pillow-type pores. In particular, the MWW zeolite shows a very high conversion, because the polymerization of m-DIPB resulting to carbon deposites is suppressed by sharing one m-DIPB molecule per unit pore. The high selectivity for benzene on MWW zeolite is explained by long retention time of reaction intermediate inducing consecutive dealkylation.
Seo, Kyong-Hwan,Lee, Hyun-Ju,Frierson, Dargan M. W. American Meteorological Society 2016 Journal of the atmospheric sciences Vol.73 No.9
<P>Significant extratropical surface air temperature variations arise as a result of teleconnections induced by the Madden-Julian oscillation (MJO). The authors elucidate the detailed physical processes responsible for the development of temperature anomalies over Northern Hemisphere continents in response to MJO-induced heating using an intraseasonal perturbation thermodynamic equation and a wave activity tracing technique. A quantitative assessment demonstrates that surface air temperature variations are due to dynamical processes associated with a meridionally propagating Rossby wave train. Over East Asia, a local Hadley circulation causes adiabatic subsidence following MJO phase 3 to be a main driver for the warming. Meanwhile, for North America and eastern Europe, horizontal temperature advection by northerlies or southerlies is the key process for warming or cooling. A ray-tracing analysis illustrates that Rossby waves with zonal wavenumbers 2 and 3 influence the surface warming over North America and a faster wavenumber 4 affects surface temperature over eastern Europe. Although recent studies demonstrate the impacts of the Arctic Oscillation, Arctic sea ice melting, and Eurasian snow cover variations on extremely cold wintertime episodes over the NH extratropics, the weather and climate there are still considerably modulated through teleconnections induced by the tropical heat forcing. In addition, the authors show that the MJO is a real source of predictability for strong warm/cold events over these continents, suggesting a higher possibility of making a skillful forecast of temperature extremes with over 1 month of lead time.</P>