번역식 영작문과 직접식 영작문의 비교 연구

황명환,이희경 한국영어교육학회 2012 ENGLISH TEACHING(영어교육) Vol.67 No.2

This study aimed to explore the effect of translated writing on English writing performance of Korean learners of English and their perceptions on translated writing in comparison with direct writing depending on their English proficiency level. A total of 75 male high school students were divided into two groups according to their L2 writing expertise and were asked to perform two different writing tasks: 1) write directly in English (direct writing), and 2) write in Korean first and then translate the draft into English (translated writing). 136 written compositions (68 direct writing samples and 68 translated writing samples each)from 68 students were selected for analytical scoring and T-Unit analysis. The 68students also filled a survey questionnaire which asked which type of writing was preferred for their English writing. The results showed that the performance of the direct writing was significantly better than that of the translated writing for highlevel writers, while there were no great differences among low-level writers between the two writing tasks. T-Unit analysis revealed that syntactic complexity between direct and translated writings by two proficiency groups did not yield any statistically significant differences, and more students preferred translated writing to direct writing in general. Based on the results, pedagogical implications are suggested.

정밀제어계통에서의 외부 고장전류로 인한 노이즈 안전대책

황명환,손영도,김규정 한국리스크관리학회 2011 리스크 管理硏究 Vol.22 No.2

제어시스템은 현대 산업사회에서 매우 중요한 도구로서, 다양한 분야에서 활용되고 있다. 이는 단순한 장치에서부터 수많은 입출력 자료에 의해 컴퓨터로 제어되는 복잡한 시스템까지 폭 넓게 활용되고 있다. 더구나 프로그램 제어시스템의 개발은 일반기계에서 산업용 로봇에 의한 생산체계로 변환시켰으며, 이는 하드웨어와 소프트웨어가 결합된 전자제어장치의 응용으로 가능하게 되었다. 최근에는 사람의 감시가 필요 없는 컴퓨터 제어전원의 공급으로 인해, 많은 산업분야에서 로봇의 사용이 더욱 빠르게 증가하고 있는 실정이다. 자동화의 증가는 과거에 매우 위험하였던 작업환경을 안전한 작업환경으로 변환시켰으며, 이는 작업의 잠재위험을 사전에 파악하여 이에 대한 충분한 안전대책이 강구되었기 때문에 가능하였다. 그러나 제어시스템의 오류는 곧 바로 사고로 연결되었고, 특히 폭발 위험지역에서의 제어시스템 사고는 매우 위험한 상황을 야기하였다. 폭발위험장소에서 사용되는 장비는 적절한 안전조치가 강구되어야 하며, 열적·전기적 에너지로 인한 점화가 되지 않도록 조치되어야 할 것이다. - 42 - 본 연구에서는 외부 전력계통으로부터의 단락전류 유입과 저전압에 의한 전자기적 영향에 대해 정밀제어계통에서의 안전 요구사항을 어떻게 고려하여야 하는지를 검토하였다. 본 연구결과 외부 고장전류로 인한 노이즈가 제어시스템의 신뢰도에 큰 영향을 미치며, 위험지역 내에 설치되는 제너베리어의 적정 설치대수는 지락전류에 의한 화재·폭발의 발생확률을 고려하여 선정하여야 함을 알 수 있었다. 또한, 전자부품에서의 온도상승은 제어시스템의 주요 사고원인으로 작용하기 때문에 지락전류의 고조파 영향으로 인한 사고 발생확률을 계산하는 경우 온도상승의 한계치가 명시되어야 할 것이다. 이외에도, 프로그램 가능형 전자제어시스템이 설치된 경우 전압강하로 인한 프로그래밍 전자장치에서의 자료손상은 화재·폭발에는 큰 영향을 미치지 않는 것으로 나타났다. Control systems are an important and pervasive part of modern industry. They range from simple devices to complex computer-controlled systems with many inputs and outputs. Especially, the developments of programmable electronic control system have made - 74 - possible the production of industrial robots which are capable of extremely flexible performances. Increased automation has the potential to lead to safer working environments in many traditionally dangerous industries. However, failures in control systems have been implicated in accidents and dangerous occurrences, particularly in the hazardous area. This research has been studied the impact of EMI on the delicate control system by the transient disturbance from the electric distribution network. The result of this research has been revealed that the control system under EMI environments should be re-evaluated in the case of assessing the reliability of a control system. Furthermore, the appropriate number of zener safety barrier should be determined by considering the probability of fire/explosion and the effect of fault current through the return path, if a number of safety barriers are installed in a limited area. Because the temperature rise of electronic components has been principal factor to cause the accident in the electronic control system, the limit of temperature rise should be specified by calculating the probability of accident and the effect of harmonics or high frequency current through the earthing return path. It has been also found that data loss of programmable electronics by the voltage interruption affects little on the probability of fire/explosion when the electronic control system installed.

고분자 film 의 표면 처리와 화학 루미네센스 특징

황명환,우인성 한국산업안전학회 1992 한국안전학회지 Vol.7 No.4

Surface treatment and chemiluminescence characteristics of the polymer film. It was studied that the intensities and rates of treatments are in proportional to condition of the treatment, considering the results of study on treatments to polymer film with discharge and ultraviolet irradiation through the methods such as surface resistance, contact angle, dyeing method, surace tension and so on. It was also studied that the said has a nice correlation with the concerned result studied by chemiluminescence. Since the chemiluminescence will enable the investigators to grasp a eertain condition caused by quitely slight deterioration with high sensitivity, it can be also used as a way for getting an information regarding the decision for degradation-condition and life-estimating of insulation material basically related to some security matters as well as surface condition of treatments through the above method.

위험성평가에 의한 폭발위험장소 구분에 관한 연구

황명환,김규정 한국리스크관리학회 2009 리스크 管理硏究 Vol.20 No.1

Economic Design Through the Reliability Analysis of Instrumentation and Control System for the LNG Shipment

황명환,우인성,김규정 한국리스크관리학회 2009 리스크 管理硏究 Vol.20 No.2

In order to improve the system reliability it may necessary to change the system by doing reliability analysis. This requires the identification of those components or subsystems which contribute most to system failure. In my research, explosion is studied as the main hazard associated with the control of the LNG shipment as result of accident history survey. Therefore, it has been concluded that the undesirable accident is fire and explosion on the ship, following release of carrier during loading, transportation and discharging, in the relation to the control system. Since the 'Top event' is known, Fault Tree Analysis(FTA) is a suitable means of identifying how the control system can contribute to or protect against the hazard. It is required to find cutsets of fault trees for its system analysis. From the FTA, the frequency of fire and explosion by the gas release is resulted in the 89.04289 f/106hr and the probability of occurrence is 89.02146×10-7 in the original system. By using Fussell-Vesely importance measures, relative importances of basic events are calculated. The failure of level transmitter has most dramatic effect on the gas release, which value was over 0.7. This item should be improved unless this action is relatively costly. The redundancy of level transmitter will be prepared for the controlling of fire and explosion in LNG carrier from this importance measure. The frequency of fire and explosion by the gas release is improved to the about 50 times reliable, 1.585709 f/106hr and the probability of occurrence is about 10 times reliable, 7.930963×10-7 by adopting only transmitter redundancy. I found that the most economical and reliable design can be determined by considering this importance measures.

Rasch 측정 모형을 이용한 교양 영어 수업 만족도 설문 도구타당화 연구

황명환,이희경,김은영 팬코리아영어교육학회 2019 영어교육연구 Vol.31 No.3

This study aims to develop and validate the scale of undergraduates’ satisfaction of college English classes. For the study, a total of 673 students were pooled. The scale items were writtenbased on the results from focus group interview with 35 students from different disciplines. A wide variety of evidence for the scale validity such as content, internal structure-related,generalizability, and substantive validity was collected through the Rasch modeling. The results are as follows. As evidence of content validity, both item fit measures and point-biserialcorrelation were acceptable. The Rasch modeling showed, as structural evidence, that the internal structure of the scale is unidimensional. Additionally, most items were found to be generalized toboth male and female students without differential item functioning, and the scale displayed highreliability. Lastly, the Rasch analysis, as substantive evidence of validity, showed that the respondents responded appropriately to the rating system as intended by the scale developers. However, the inconsistency was found in item-person map, signifying that the distribution of item difficulty did not cover the whole level of students’ satisfaction, which means that more items to measure a high level of satisfaction of college English class need to be added. More pedagogical implications are discussed in the study.

나사렛 예수의 생애

황명환 장로회신대학교 2005 敎會와 神學 Vol.61 No.-

얼마 전에 부활절이 있었다. 그리고 그전에는 고난주간과 사순절이 있었다. 이때가 되면 많은 성도들이 예수의 고난을 생각하고, 어떠한 방법으로든지 거기 동참하려는 모습을 보게 된다. 특별 새벽 기도회 때에는 가상칠언이나 예수님의 마지막 일주일에 관한 설교도 많이 한다. 이럴 때마다 나는 한권의 책을 반복하여 읽는다. 그것은 바로 윌리암 바클레이가 쓴 The Mind of Jesus라는 책인데, 우리말로는 나사렛 예수의 생애(이상길 옮김, 지성 문화사)라는 제목으로 번역되어 있다.

방전 프라즈마 화학반응을 이용한 유해물질의 분해

황명환,우인성,산외번장 한국산업안전학회 1996 한국안전학회지 Vol.11 No.4

과부하에 의한 전기화재

황명환,이덕출,Hwang, Myeong-Hwan,Lee, Deok-Chul 한국화재보험협회 1990 防災와 保險 Vol.46 No.-

이종방전 중첩에 의한 방전 플라스마반응기의 효율개선의 시도 : 연면 , 직류코로나 방전 중첩형 반응기의 특성 Characteristics of Surface and Corona Discharge Combined Plasma Reactor

황명환,우인성,산외서수 한국산업안전학회 2000 한국안전학회지 Vol.15 No.3

In order to cope with environmental problems caused by harmful gases emitted from various industrial sources, a new technology which employs discharge plasma formed in ordinary atmospheric pressure has been intensively investigated in many industrialized nations. Although a plenty of useful outcomes and suggestions have been made public by scientists in this field, few commercial products which effectively decompose pollutant gases have appeared as yet. This is partly because that the energy efficiency of a most effective plasma reactor has not reached a satisfactory level in comparison with those of devices using conventional technologies. In an attempt to solve the problem mentioned above, we noticed to combine heterogeneous electrical discharges. This concepts is based on that each plasma reactor has its specific spatial region in which chemical reaction are active and by electrically affected with another reactor of different type, the activated region would increase - which may lead to cutting down the energy consumption. To prove this concept experimentally, two different discharge equipments, a plane ceramic-based surface discharge electrode and a corona electrode with tungsten needle array, are selected and combined to fabricate a hybrid plasma reactor. The results are summarized as follows; (1) Ozone concentration generated in the plasma region drastically increases when the positive corona discharge is added to the surface discharge. The rate of increase of ozone depends on the frequency of the surface discharge. The negative corona, however, does not contribute to the improvement of the ozone generation. (2) NO(nitrogen monoxide) decomposition rate also improves by simultaneously applying the surface and the positive corona discharges. The effect of the corona superposition is more evident when the level of the surface discharge is moderate. (3) By adjusting the corona level, the net energy efficiency during NO decomposition improves in comparison with the simple surface discharge reactor.