自己?能理論의 動機觀과 硏究動向

권대훈 안동대학 학생지도연구소 1988 學生指導硏究 Vol.8 No.1

This article examines motivational perspective of Bandura's self-efficacy theory and reviews recent research articles which was performed to test its predictions in academic achievement situations. First, motivational perspective of self-efficacy framework is discussed Self-efficacy refers to personal judgment about one's capability to organize and implement behavior in specific situations. As a proximal mediating mechanism, self-efficacy is hypothesized to influence task motivation (effort expenditure and persistence), choice of activities, and thought patterns people acquire their efficacy information from their performance accomplishments, vicarious experiences, verbal persuasion, and their physiological states. People judge (percept) their efficacy in specific situations through inferential process in which these information are weighted and integrated with respect to various efficacy cues such as perceived ability, effort expenditure, external aids, outcome patterns. Second, self-efficacy perspective is compared with locus of control, attribution theory, self-worth theory, and learned helplessness. Third, recent studies performed under the rubric of self-efficacy are divided into those upon student efficacy and those upon teacher efficacy, and reviewed separately. Studies which successfully enhanced student self-efficacy are reviewed under the headings of reward, attributional feedback, goal-setting, social comparision, and strategy training with their educational implications. And the nature, antecedents, and consequences of teacher efficacy are discussed according to the self-efficacy framework. Also the relations of student efficacy, teacher efficacy, achievement, and other related variables are explored. Finally, some directions for future research are suggested.

살모사 교상 후에 발생한 뇌간 경색

권석범,이병철,배재천,황성희,김대훈 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

화학 변화 개념에 대한 중학교 2학년 학생들의 선개념 조사 및 선개념 갈등상황 제시를 통한 개념변화 학습이론의 효과 분석

白盛惠,강대훈,金惠敬,蔡禹基,權鈞 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

본 연구에서는 중학교 2학년 학생들의 선개념을 조사하고, 개념변화 학습이론을 적용한 과학 수업을 제공함으로써 학습자의 학습 동기가 잘못된 선개념을 올바른 과학 개념으로 바꾸는데 어떠한 역할을 하는지 알아보았다. 이를 위하여 개념변화 학습이론에 근거한 수업을 받은 학습자의 선개념의 변화를 전통적인 수업을 받은 학습자의 선개념 변화와 비교하여 보았다. 연구 결과, 학생들은 중학교 1학년때 배운 물리 변화를 화학 변화의 개념과 혼동하여 화학 변화를 단순히 물리적 변화인 상태 변화로 인식하거나, 이와 관련된 잘못된 선개념들을 많이 가지고 있는 것으로 나타났다. 또한 화학 변화의 한 예인 연소 현상에 대해서는 초등학교 6학년부터 학습한 내용임에도 불구하고 눈에 보이지 않는 산소의 결합을 인식하지 못하였으며, 많은 문제의 상황에서 질량 보존의 법칙을 기계적으로 적용하는 특징도 보였다. 수업의 효과로는 개념변화 수업을 받은 학생들이 과학적 개념을 부분적으로 또는 완벽하게 이해를 한 비율은 50%를 넘지 못하였다. 그러나 이 비율은 교과서에 의존한 전통적인 수업을 받은 학생들의 과학적 개념 이해 비율인 39% 보다는 높은 비율이라고 할 수 있다. 개념변화 수업을 받은 학생들의 올바른 과학 개념 습득 비율이 전통적 수업을 받은 학생들의 비율보다 통계적으로 유의미하게 높은 것으로 나타났다. 따라서 본 연구에서 개발하여 실시한 개념변화 수업은 학습자의 올바른 과학 개념 습득에 효과적이라고 할 수 있다. Preconceptions of middle school students related to chemical change the students are surveyed. The students are divided into experimental group that are learned by concept change theory teaching model, and control group that are learned by traditional teaching method based on science textbooks. After the planned classes, the tendencies of concept change of the two groups according to students learning motivations are analyzed. New teaching methods, which based on concept change learning model and students learning motivations, developed by this research. And the effects of the new teaching method are testified. As a result, it is proved that most of the students have a lot of preconceptions, and persist the wrong conceptions after the classes. This tendency is same in the control group and in the experimental group.

중학교 화학 분야의 개념 연구에 대한 문제점 분석

朴恩姬,姜대勳,白盛惠,朴國泰,金惠敬,蔡禹기,權鈞 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

중학교 화학 분야의 오개념 조사에 사용된 설문지의 문제점을 밝혀, 학생들의 정확한 오개념 조사를 위한 바탕을 마련하고자 한다. 기존의 중학교 화학 분야에 대한 오개념 조사 설문지가 연구 대상 학생들에게 잘못 사용되고 있었으며, 문항 내용 자체에도 오류가 있었음을 지적하고자 하는 것이다. 선행 연구들의 분석 결과들이 오개념이 아니라 무개념임을 확인하기 위하여 중학교 1학년 학생 182명을 대상으로 두 종류의 설문지 A와 B를 투입하여 조사하였다. 설문지 A는 오개념 연구를 위해 선행 연구들에서 사용한 문항들로 이루어진 것으로, 이를 투입한 결과를 선행 연구들의 결과들과 비교하기 위한 것이다. 그리고 설문지 B는 설문지 A에서 응답한 학생들의 구체적인 생각을 알아보기 위하여 새롭게 개발한 것이다. 설문지 A를 통해 얻은 결과와 선행 연구들에서 얻은 결과들을 비교할 때, 전반적으로 일관성이 없게 나타났으며, 중학교 1학년 학생들의 주관식 정답률이 객관식 정답률에 비해 매우 낮게 나타나는 공통점은 있었으나, 문항 자체의 오류들이 발견되었다. 설문지 B를 통해 학생들의 생각을 알아본 결과, 설문지 A에서 과학적 개념과 오개념으로 분류된 학생들 중에서 무개념으로 판단된 경우가 많았다. This study was to clarify the problems of questionnaires related to misconception researches of middle school chemistry and to prepare a ground for the correct misconception research for students. For these purposes, the questionnaires of the misconception researches related to chemistry in middle school were analyzed, and the mistakes of the questions which were used in 7th grade students were found, based on a definition of misconceptions in this study. Also, the errors in contents of the questionnaires were indicated. The results of the analysis revealed that most of the 7th grade students did not have misconceptions contrary to some of the previous researches conclusions. They only had no conceptions related to the contents. In order to support this analysis, two different questionnaire sets (questionnaire set A and B) for 182 7th grade students were used. After obtaining similar results to those of the previous researches by the questionnaire set A, the students' thoughts were examined by the questionnaire set B. From the results of this study, the correct answer rates of subjective questions were very low compared with those of objective questions in the questionnaire set A for 7th grade students. It was hard to find consistency among the results of the researches using the questionnaire set A. And many contents of the questions consisted of the questionnaire set A were not consisted with a definition of misconceptions. There were errors in the contents of the questions, too. The students classified as the having-science-concepts group and the having-misconceptions group by the questionnaire set A were classified as the having-no-concepts group by the questionnaire set B.

배관내에서 난류 마찰 저항감소에 관한 연구

박설현,윤정환,서동표,정대훈,오율권 朝鮮大學校 機械技術硏究所 2000 機械技術硏究 Vol.3 No.1

Polymer drag reduction can offer a attractive way to utilize ready-made facilities in crude-oil transport system without additional large expenditure. Also, drag reduction in two phase flow can be applied to phase change system such as chemical reactor, pool and pump impeller which occurs cavitation. But the research on drag reduction in two phase flow has not been investigated. Therefore, experimental investigations have been carried out to analyze the drag reduction in the single phase and two phase flow. The objectives of the proposed investigation are primarily to identify and develop high performance polymer additives for fluid transportation. And drag reduction will be evaluated in horizontal flow by measuring void fraction, pressure drop, mean liquid velocity and turbulent intensity

미세혈관 협심증 환자의 임상상 및 지표에 관한 연구

박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.

우리나라 고대체술에 관한 연구 -봉우(鳳宇)권태훈(權泰勳)선생의 체술론(體術論)을 중심으로-

권영훈 ( Young Hun Kwon ),봉학근 ( Hak Keun Bong ),윤대중 ( Dae Jung Yun ) 한국체육사학회 2013 체육사학회지 Vol.18 No.2

이 연구는 신라 삼국통일 이후 사대주의 사상으로 인해 그 전승이 상실된 우리나라 고대 체술에 대하여 봉우 권태훈 선생의 체술론을 바탕으로, 실전된 우리 체술의 실체적 면모를 구체적으로 살펴보는 것을 목적으로 하였다. 이를 위하여 봉우 선생의 유고집과 강연록 그리고 그 외, 이와 관련된 사료와 설화, 야담집 등의 문헌을 분석하였다. 연구결과는 다음과 같다. 첫째, 봉우선생의 체술론은 관련문헌과 대부분일치 하였다. 둘째, 체술은 전쟁의 승패를 결정짓는 핵심 요인이었다. 셋째, 고구려 ‘조의선인, 과 신라의 ‘화랑’, 들을 비롯한 역사상 수많은 명장, 갑사들이 모두 체술을 습득하였다. 넷째, 근래까지도 秘傳되고 있었으며, 더 이상 전설이나 설화의 영역에 머물 수 없는 실증적 사실이었다. 다섯째, 체술은 정신수련에 기초하며, 민족의 고유한 정체성과 주체성을 대변하는 구성요소였다. This study aimed to conduct detailed examination on substantial state of the country`s lost physical training, based on the theory of physical training of Bongu Kwon Tae-hun with regard to the country`s ancient physical training ceased to be handed down owing to toadyism since the unification of three nations by Silla. For this, the study analyzed literature including Bongu`s posthumous manuscripts, collection of lectures as well as relevant historical records, tales and story books. The study had the findings as below. First, most of Bongu`s theory of physical training agreed with the related literature. Second, physical training was a core driving force to achieve a victory in wars. Third, a large number of great commanders and brave military men in history including “Jouiseonin” (military officers) in Goguryeo and “Hwarangdo” in Silla, were masters of physical training. Fourth, physical training has been handed down secretly until recent times and was an empirical fact, which should no more be treated as one of legends or tales. Fifth, physical training, based on mental disciplines, was the element representing the nation`s unique identity and independence.

ORiginal Article : Continuous Long-Term Entecavir Therapy in Naive Chronic Hepatitis B Patients Showing Partial Virologic Response

( Dae Hun Kwon ),( In Hee Kim ),( Bum Su Choung ),( Dae Seon Ahn ),( Sun Ho Yoo ),( Sang Bae Park ),( Seok Lee ),( Seong Hun Kim ),( Sang Wook Kim ),( Yong Jin Im ) The Editorial Office of Gut and Liver 2013 Gut and Liver Vol.7 No.6

Background/Aims: We investigated the efficacy of continu-ous long-term entecavir 0.5 mg treatment in naive chronic hepatitis B patients showing a partial virologic response (PVR). Methods: A total of 227 patients were included. PVR was defined as a more than 1 log10 IU/mL decline in detect-able serum hepatitis B virus (HBV) DNA by polymerase chain reaction (PCR; ≥20 IU/mL) at week 48. A complete virologic response (CVR) was defined as undetectable serum HBV DNA by PCR (<20 IU/mL) at week 48. Results: At week 48, the rate of the PVR was 64/227 (28.2%). Among patients with PVR, the cumulative rates of virologic response (serum HBV DNA <20 IU/mL) at weeks 96 and 144 were 45.2% and 73.8%, respectively. The cumulative rates of genotypic resistance were not significantly different between patients with a PVR and patients with a CVR (p=0.057). However, the cumulative rates of virologic breakthrough were higher in patients with PVR than in patients with CVR (4% vs 0% and 11.2% vs 0% at weeks 96 and 144, respectively; p<0.001). Conclusions: Long-term continuous entecavir 0.5 mg treat-ment in patients with a PVR resulted in an additional virologic response without a significant increase in genotypic resis-tance. However, the rate of virologic breakthrough was higher in the partial responders. (Gut Liver 2013;7:712-718)

Castleman`s disease presented as symptomatic retroperitoneal mass

Dae Hun Kwon,Tae Hwan Lee,Won Kim,Sik Lee,Kyung Pyo Kang,Kyu Yun Jang,Sung Kwang Park 대한내과학회 2009 대한내과학회 추계학술대회 Vol.2009 No.-

Successful treatment with voriconazole and amphotericin B in Pulmonary aspergilloma with recurrent hemoptysis: A case report

Dae Hun Kwon,Ji Youn Sohn,Jae Seung Soh,Jong Whan Chong,Dae Seon Ahn,Young Min Hong,Young Ha Baek,Yang Keun Rhee 대한내과학회 2009 대한내과학회 추계학술대회 Vol.2009 No.-