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e-러닝, b-러닝, 그리고 교실수업이 내용지식 습득과 영어능력 향상에 미치는 효과
한문섭(Han Moon-Sub) 팬코리아영어교육학회(구 영남영어교육학회) 2006 영어교육연구 Vol.18 No.2
This paper investigates and compares the effects of e-learning, b(lended)-learning, and traditional classroom learning on Korean college students’ acquisition of the subject knowledge of a content course and on the improvement of their general English proficiency. Three intact classes were taught in English through the three respective ways and their acquisition of the content knowledge was measured through a final exam which contained different types of questions. The students’ English proficiency was also measured through a TOEIC-type paper test before and after the semester. The results of the study revealed the superiority of b-learning over e-learning and traditional classroom face-to-face learning in the acquisition of content knowledge. However, the change of the students’ English proficiency showed no significant differences between the three different types of learning.
한문섭(Han, Moon-Sub),현석분(Hyoun, Seok-Boon) 한국초등영어교육학회 2008 초등영어교육 Vol.14 No.3
While the effects of the immersion education are still debatable, the Korean Ministry of Education, Sciences and Technology is preparing to adopt the immersion education in English in the newly delegated free-trade region and Jeju Special Self-Governing Province. Regarding this state of affairs, the researchers felt the need to investigate 1) whether the immersion education in truly appropriate for Korean public education, and 2) if there are any prerequisites in case of its adoption. The researchers conducted personal interviews with 3 teachers, 1 parent and 1 student who participated in a content-based English teaching program. The close analysis of these interviews revealed that the current immersion education heavily relies on the extra-curricular English classes taken at private language institutes and that the immersion education was not feasible in its truism at such public schools where the students do not take the extra classes outside school. The researchers conclude that the government should establish relevant policies that would empower the public schools and the teachers to incorporate immersion teaching into their regular curricular.
한문섭(Han Moonseob),김형철(Kim hyungchul),나재두(Na Jae-Du) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
D.C. traction systems can cause stray currents which could adversely affect both the railway concerned and outside installations, when the return circuit is not sufficiently insulated versus earth. As experience for several decades has not shown evident corrosion effects from a.c. traction systems and actual investigations are not completed, stary currents flowing from a d.c. traction system is issued. D.C. traction systems can cause stray currents can be corrosion and subsequent damage of metallic structures, where stray currents leave the metallic structures. There is also the risk of overheating, arcing and fire and subsequent danger to persons and equipment. Any provision employed to control the effects of stray currents be checked, verified and validated. Direct measurement of stray current is difficult and a provision employed to control the effects of stray currents is proposed.
한문섭(M. S. Han),창상훈(S. H. Chang),신명철(M. C. Shin) 대한전기학회 2013 전기학회논문지 Vol.62 No.3
A neutral section is installed around feeding substation(SS) and sectioning post(SP) that M?phase and Tphase are isolated in AC feeding system. Electric Train under “Notch?OFF” is operated by inertia within the neutral section. It causes disturbing the operation of electric trains for speed drop and driver’s mistakes. A automatic changeover system with thyristor recently have taken under development. In the paper, it is introduced the configuration of train detection system and performance testing on automatic changeover system..
한문섭(Moonseob Han),이장무(Chang-Mu Lee),김재원(Jae-Won Kim),창상훈(Sang-Hoon Chang) 대한전기학회 2018 전기학회논문지 Vol.67 No.1
The voltage drop is important in electric railway for feeding a huge power of train on fixed feeding area. Nowadays it is tried to operate a high speed trains on conventional lines and there is problem on the voltage drop too. It is simulated on the conditions increased the turn ratio of trolley, installed autotransformer neutral line with variable taps. In result, it is compensated the voltage drop between ATs and better on last AT, not on the position of AT. And it is decreased a return current and neutral current of AT because of unbalance between trolley and feeder. It should be studied faster and more controllable the solid state switchs instead of the mechanical one in order to utilize this system.