흰 민들레 추출물의 항산화능 및 항균활성

박명수, 라만, 임우종, 김기윤, 우성만, 이선미, 사동민 忠北大學校 農業科學硏究所 2011 農業科學硏究 Vol.27 No.4

-본문참고-

초등학생의 읽기 능력과 과학 탐구 능력 및 과학 성취도와의 관계

장명덕,정철,정진우 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

본 연구의 목적은 읽기 능력이 과학 탐구 능력 및 과학 성취도와 어느 정도의 관련이 있는지를 알아보는 것이다. 최근 30년간 실험실 활동과 탐구 능력은 상당한 관심을 받으며 강조된 반면, 읽기 활동과 읽기 능력(또는 독해 능력)은 과학교육분야에서 소홀히 취급되고 있는 실정이다. 그러나 글을 읽는다는 것은 단순히 글자를 해독하는 과정이 아니라 다양한 요소들이 개입되는 사고의 과정이라는 인식 하에 읽기는 최근 일부 과학교육학자들에 의해 꾸준히 연구되어지고 있다. 이러한 연구들 중 흥미로운 것은 읽기 능력과 탐구 능력 요소들간의 유사성에 대한 찬ㆍ반 논의이다. 이에 본 연구에서는 인천광역시의 초등학교 5학년 115명을 대상으로 읽기 능력, 탐구 능력 및 과학 성취도의 관계를 알아본 결과, 이 세 요소는 유의미한 상관 관계를 나타내었다. 이는 문제해결 활동으로써 과학과 관련된 글에 대한 읽기 활동을 적절히 활용한다면 학생들에게 탐구 능력 요소들을 연습할 수 있는 기회를 제공할 뿐만 아니라 과학 지식의 습득이라는 과학교육의 중요한 두 가지 목표 달성에 효과적인 방법이 될 수 있음을 시사한다. The purpose of this study was to inquiry how much elementary students' reading ability has relations with science process skills and science achievement. Generally laboratory activity and science process skills have been emphasized, on the other hand, reading activity and reading ability have been neglected by science educators for nearly 30 years. But reading a text is not simply a process of decoding printed symbols; it is a process of thinking involved manifold factors. Under this recognition, some science educators have steadily researched into reading. The interesting thing out of them is pros and cons about correspondence between science process skills and reading skills. Therefore, in order to investigate the relationships between reading ability, science process skills, and science achievement, grade 5 students (N=115) Were selected from one elementary school in Inchon and then they were required to respond to tests (which assess reading abilities, science process skills, and science achievement). The results of this study appeared to indicate that reading ability has significant relations with science process skills and science achievement. Probably, the proper using of scientific written materials, as problem-solving activity, will provide students with opportunities that they can practice science process skills and obtain the scientific knowledge.

웹 기반 협동학습에서 상호의존성이 학업성취도에 미치는 영향

김명랑,박인우 이화여자대학교 교육과학연구소 2009 교육과학연구 Vol.40 No.1

본 연구의 목적은 협동학습에서 교육적 효과를 얻기 위해서는 긍정적 상호의존성이 바탕이 되어야 한다는 기본 원리를 바탕으로, 웹 기반 협동학습에서 나타난 상호의존성이 학업성취도에 미치는 영향을 알아보고자 한 것이다. 본 연구에서 설정한 상호의존성은 두 가지로 웹 게시판 활동에 의한 상호작용 기반 상호의존성과 자기보고에 의해 인지된 상호작용 기반 상호의존성이다. 연구대상은 초등학생 6학년 35명이었고, 기간은 1개월이었다. 상호작용 기반 상호의존성과 인지한 상호의존성은 각각 사회연결망 분석의 중앙성 지수(연결정도, 사이, 인접)를 산출하고, 중다회귀분석을 사용하였다. 분석 결과 상호작용 기반 상호의존성과 인지된 상호의존성 간의 차이를 보였고, 학업성취도에 미치는 상호작용 과정과 인지된 상호작용의 요인은 차이를 보였으나 모두 학업성취도에 영향을 미치는 것으로 나타났다. The purpose of this study is to clarify the effect of the interdependence in web-based cooperative learning on achievement. Interdependence is one of the most important elements in the cooperative learning. To find out effects of interdependence on achievement, this study has been conducted in aspects of recognized interdependence reported by the learner and interaction based interdependence by web board activities. Subjects were thirty-five in sixth-grade students and the period was a month. Two conditions of interdependence(recognized interaction and interaction based interdependence) were analyzed bythe Social Network Analysis(SNA) using centrality indices(degree, betweenness, closeness) and the Multiple Regression Analysis. The results were founded that centrality indices of recognized interdependence were different from that of interaction based interdependence slightly, but the achievement was affected by both cases.

장원병성 대장균과 설사

장우현,최명식 대한감염학회 1981 감염 Vol.13 No.1

조직특성과 대인관계 특성이 직무만족에 미치는 영향에 관한 연구 : 여성금융기관 종업원을 중심으로 focused on Female Employees in the Financial Institution

천명섭,최병우 한국생산성학회 2003 生産性論集 Vol.17 No.3

Reviewing the literature of human resources management, we found researchers have explored different impact factors of organizational characteristics, interpersonal characteristics, levels of perceived activities on job satisfaction. In this paper, we add a new factor that includes interactive effects of organizational characteristics and interpersonal characteristics on job satisfaction. Utilizing structural equation modeling, we test our proposed model among female employees in the financial institution. The Structural Equation Modeling approach has been employed to investigate the cross influences among the four categories. The proposed model produces the best fit. The organizational characteristics category is the most important effect among categories of the proposed model of job satisfaction. Additionally, the theoretical and managerial implications are discussed.

인터넷 벤처비즈니스 평가체계에 관한 연구

이명호,이우형,손성혁 한국경영과학회 2001 韓國經營科學會誌 Vol.26 No.3

Riding on the wave of the information technology revolution, a slew of internet venture businesses(IVB) came into being. Hence, one of the recent deveopments in Korean capital market has been the proliferation of IVB, which is in accordance with the worldwide trend of 'new economy'. Although the fair valuation is crucial for the nourishment of IVB. It is difficult to apply traditional valuation methods to these firms without reservation. It is due to the facts that most venture firms have little records of performance, grow unprecedently fast, and have highly uncertain future. The main purpose of this study is to suggest performance evaluation system of IVB and to develop KPI(Key Performance Indicators). Our empirical study is based upon Kaplan & Norton's Balance Scorecard (BSC) approach. Specifically, our research has been conducted by the following two subsequent procedures: Firstly, seven internet venture firms have been selected and their executives have been interviewed by FGI(Focus Group Interview) method. Based upon these results, performance indicators been developed. Secondly, by using the above mentioned BSC items(i.e., financial perspective, customer perspective, internal perspective and innovation & learning perspective), questionnaires have been costructed and sent to IVB through e-mail as well as over the Fax. Among the collected 110 samples, reliable 106 samples have been used to build BSC model and to draw our conclusion. In the future study. It would be much better to consider the role of strategy in IVB and the causal relationships among Key Performance Indicators of BSC.

대학생들의 자살관련행동에 관한 연구

노명선,전홍진,이해우,이효정,한성구,함봉진 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.1

Objectives : This study evaluated the prevalence of suicide-related behaviors (suicidal ideation, plan and attempt) and the status of depression, anxiety and function in college students. Methods : A cross-sectional study was completed to a sample of 880 students with the self-administered form of Korean version of the Mini International Neuropsychiathc Interview (K-MINI), Beck Depression Inventory (BDI) and Beck Anxiety Inventory (BAI). Results : Estimated lifetime prevalence of suicidal ideation was 39.2%, that of suicidal plan was 4.7% and that of suicidal attempt was 3.0%. Students with any suicide-related behaviors showed higher lifetime prevalence of major and minor depression, higher BDI and BAI scores, and poor intemersonal relationship, adaptation to college life and physical health compared to the students with no suicide-related behaviors. The average points of grades during their college life were not significantly different according to kinds of suicide-related behaviors they expehenced (F=0.39, P=0.82). 96% of suicidal attempters did not use mental health services. Conclusion : Results suggest that a high proportion of college students experience suicide-related behaviors. The Stu-dents who had experienced suicide-related behaviors showed higher depression and anxiety and poorer function compared to students with no suicide-related behaviors. Most of suicidal attempters, however, did not use mental health service Establishing campus mental health system is necessary to early detect mental health problems and to prevent suicide of college students.

대학생들의 우울장애에 관한 연구 : 유병율, 위험요인, 자살행동 및 기능장애

노명선,전홍진,이해우,이효정,한성구,함봉진 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.5

Objectives : The purpose of this study was to investigate the prevalence and correlates of major and minor depressive disorders in college students. Methods : A cross-sectional study was completed on a sample of 906 students (507 men and 399 women) with the self-administered form of Korean version of Mini International Neuropsychiatric Interview (K-MINI). Results : Estimated 12-month prevalence of major depressive disorder was 4.2% in men and 9.5% in women, and that of minor depressive disorder was 15.4% in men and 23.2% in women. The factors, 'female gender' and 'age of 20-21', were significantly associated with major depressive disorder. 'Poor adaptation to school' was significantly associated with major depressive disorder both in men and women, but 'poor interpersonal relationship' and 'history of school withdrawal' were associated only in men. Idea of self-injury and suicidal behaviors (suicidal ideation, plan and attempt) were significantly associated with major depressive disorder in women, but were not associated with minor depressive disorder. Conclusion : Major and minor depressive disorders are highly prevalent in the college students. Major depressive disorder was more associated with dysfunctions and suicidal behaviors than minor depressive disorder. Campus-based mental health service is needed for the high-risk students.

L-Orinithine Aspartate의 Drowning-out 결정화에서 결정화 조건이 입자크기에 미치는 영향

신동명,김우식 慶熙大學校 材料科學技術硏究所 1998 材料科學技術硏究論集 Vol.11 No.-

When the ornithine-aspartate was crystallized by drowning-out using methanol in the turbulent agitated semi-batch reactor, the effect of turbulent mixing and crystallization conditions, such as feed concentration, feeding rate and volume ratio of methanol to ornithine-asparate solution, on the agglomeration and breakage of the ornithine-asaprtate particle was studied. In the crystallization process the agitation is the most important factor on the growth of particles, since the agglomeration and breakage is the most important factor on the growth of particles, since the agglomeration and breakage are happened by the collision o particles and the collisions between particle and the wall of reactor or impeller due to the effect of fluid shear. At low agitation speed, the particle collision process was dominant to the turbulent shear but it became inverse with increased of the agitation speed. Thus, the particle size was reduced with increase of the agitation speed.

2.4GHzWLAN용스위치설계를위한GaAspHEMT소자모델링

한명우,이창석 한밭대학교 정보통신전문대학원 2005 정보통신전문대학원 논문집 Vol.3 No.1

본 논문에서는 2.4GHz WLAN용 스위치 설계를 위한 GaAs pHEMT 소자 모델링을 수행하였다. 스위치 소자 모델로는 공정 파라미터의 함수로써 스위치 특성의 예측이 가능하고, 순방향과 역방향 특성이 대칭성을 갖는 Curtice2(Curtice-Quadratic GaAsFET)모델을 사용하였다. 스위치 동작 영역과 일반적인 스위치 증폭영역에서 소신호 및 대신호 모델들을 각각 추출하였고, 측정된 결과와 모델링 한 결과들을 비교함으로써 제안된 방법이 스위치 설계에 타당함을 확인하였다. In this paper, we have performed GaAs pHEMT device modeling for the switch design of 2.4GHz WLAN. For the switch device model, we have used Curtice2(Curtice-Quadratic GaAsFET) model, which has symmetrical forward and backward characteristics and possible for the prediction of the switch characteristics as a function of process parameters. We have extracted small signal and large signal models at the switch operating region and the general switch amplified region, respectively. By comparing the measured results with the modeling results, we have verified the proposed method is appropriate for the switch design.