http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Patterns of Peer Feedback and Learner Proficiency in L2 Writing
정우현(Woo-hyun Jung) 한국영어교과교육학회 2020 영어교과교육 Vol.19 No.4
This study explores to what extent high- and low-proficiency university students provide peer feedback and what kind of peer feedback each group prefers. This is considered in terms of the area (global vs. local), type (clarification, evaluation, suggestion, and alteration), and nature (revision-oriented vs. non-revision-oriented) of comments. To collect peer feedback data, the study employed a peer-review task where 118 Korean university students gave feedback on an unknown student’s first draft of an argumentative essay. The results show that the high-proficiency reviewers differed greatly from the low-proficiency counterparts in the quantity of peer feedback, with the former outperforming the latter. However, the two groups exhibited similar patterns of peer feedback in many ways. Both groups relied heavily on local comments, especially feedback on grammar, with a dearth of global comments such as content and organization. A similar tendency was true in the type of feedback in that both proficiency groups had the strongest preference for alteration comments. Notable as well is that the two groups produced a far higher proportion of revision-oriented comments than non-revision-oriented ones. On the basis of the findings, the study provides pedagogical suggestions to promote effective peer feedback interactions in L2 writing classrooms.
Listening Activities in Korean EFL Contexts:Bottom-up, Top-down, and Interactive Types
정우현(Woo-hyun Jung) 한국외국어교육학회 2004 Foreign languages education Vol.11 No.2
This paper deals with an information processing dimension of listening activities. The main purpose of the study is to investigate how selected listening activities proposed by Peterson (1991) and Brown (2001) for ESL contexts are employed by students in Korean middle schools, high schools, and universities, with special attention to different types of listening processing: bottom-up, top-down, and interactive. Using a questionnaire survey, data were collected from 600 students to identify their use of listening activities. The results indicated that the listening activities used by Korean students were generally limited in variety and were not in accordance with their education levels. The learners in general resorted to the top-down type most frequently. An investigation of how each education group (middle school, high school, and university) employs different types of listening activities revealed that each group employed the top-down type most frequently, lacking the bottom-up and interactive types. On the basis of the results, pedagogical implications are discussed and suggestions are made for activating listening activities, which is in turn expected to lead to learners’ increased listening competence.
디스플레이 장치의 특성에 따른 순간 제시 자극의 정확성 비교
정우현(Jung Woo Hyun),정지연(Jung Jiyeon) 한국HCI학회 2021 한국HCI학회 논문지 Vol.16 No.3
시각심리학에서 실험 자극을 정확히 제시하기 위해서는 디스플레이 장치의 특성을 이해하는 것이 중요하다. 특히 자극을 아주 짧은 순간 동안만 제시하는 ‘순간 제시 연구’에서는 디스플레이 장비에 따라 연구자의 의도와는 다른 자극 형태가 제시될 수도 있다. 자극이 완전히 출현하기까지의 시간과 자극 잔상의 지속 시간을 디스플레이 장비별로 측정하여 순간 제시 정확성을 비교하였다. 디스플레이 장비로 CRT, scanning backlight LCD, sample-and-hold LCD가 사용되었다. 측정 결과 자극 출현 시점은 sample-and-hold 모니터가 더 빠른 양상을 보였지만 CRT 모니터 및 scanning backlight LCD 모니터와 큰 차이는 나지 않는 것으로 나타났다. 잔상이 사라지는 시점은 자극의 종류와 상관없이 일관적으로 CRT 모니터와 scanning backlight LCD 모니터에서 짧게 나타났다. Sample-and-hold LCD 모니터는 전반적으로 잔상이 오래 남았으며 이러한 경향은 화면 제시 빈도가 낮을수록 강하게 나타났다. 자극의 순간적인 제시가 필요한 연구에서는 sample-and-hold LCD 모니터가 정확한 자극이 제시되지 못할 가능성이 있으며 CRT 또는 scanning backlight LCD를 쓰는 것이 더 적절함을 보여준다. It is important to understand the characteristics of display devices in the study of briefly presented visual stimuli. To compare the accuracy of briefly presented stimuli, the time of stimulus appearance and duration of afterimage was measured for each display. CRT, scanning backlight LCD, and sample-and-hold LCD were used. As a result of the measurement, the time of stimulus appearance was faster in the sample-and-hold monitor, but there was little difference between the CRT monitor and the scanning backlight LCD monitor. The time at which the afterimage disappeared was consistently short in the CRT monitor and the scanning backlight LCD monitor. Sample-and-hold LCDs generally left afterimages for a long time, and this tendency was stronger as the refresh rate was lower. It suggests that it is more appropriate to use a CRT or scanning backlight LCD rather than a sample-and-hold LCD in studies that require a brief presentation of stimuli.
얇은 히터 thermal activity의 올바른 결정을 위한 가열 방법에 따른 실질 가열 두께 연구
정우현(Woo Hyun Jung),조항진(HangJin Jo) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
In various industrial field such as nuclear engineering (fuel cladding) and electronics (chip cooling), a critical heat flux of thin heater are getting a lot of interests due to its unusual characteristic, lower CHF value than the thick heater. In case of the thin heater, generally the critical heat flux has a tendency to decrease as the thickness of heater decreased. This phenomenon is interpreted as the thermal property effect of heater, represented by the thermal activity parameter that is composed of heater thickness, density, thermal capacity, and thermal conductivity. In this paper, it is claimed that the heater thickness parameter could be changed according to the heating method; Joule heating method (direct heating) or conduction heating methods (direct heating). By solving the conduction problem of heater numerically with the dry patch mechanism concept for the CHF, giving thinner thickness for the Joule heating method as an effective heating thickness showed consistency on the numerical results.
An Analysis of the Passive Voice Presented in Secondary-Level English Textbooks
Woo-hyun Jung(정우현) 한국외국어교육학회 2007 Foreign languages education Vol.14 No.2
This paper seeks to analyze the passive voice in English textbooks in terms of sufficiency, sequencing, variety, interest, authenticity, and appropriateness. A total of thirty textbooks was randomly chosen for the analysis, six exemplars being selected from each grade from intermediate middle school through advanced high school. The results show that the subtypes of passives presented were substantial enough to fully understand the nature of the passive, and that the various sub-types of passives were sequenced reasonably. However, limitations were revealed in providing enough variety of activities/exercises on the one hand and of visual aids on the other. The textbooks were also found to contain several non-authentic language patterns such as wrong choice of the verb, collocation problems, etc. More serious was not only heavy reliance on sentence-level mechanical practices, particularly conversion exercises, but also the lack of attention paid to function-oriented instructions on the passive. These findings are expected to contribute to the effective design of new textbooks under the revised curriculum.