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체육계열 대학생들의 학업적 자기효능감과 전공만족도 및 진로결정태도의 관계
이광민,최영준 중앙대학교 학교체육연구소 2018 Asian Journal of Physical Education and Sport Scie Vol.6 No.3
The purpose of this study was to identify the relationships among academic self-efficacy, major satisfaction and career decision attitude of sport related majoring students. To achieve the purpose, 382 sport related majoring students were selected from universities in B city and Y city. Out of the 382 questionnaires responded to, only 316 were used for data analyses because 66 were responded to incorrectly. To process data, SPSS PC+25.0 Version statistical program for Windows were used and descriptive statistic, exploratory factor analysis, reliability analysis, correlation and standard multiple regression analysis were conducted. As the results, the following conclusion was derived. First, academic self-efficacy in sport related majoring students had a significant effect on major satisfaction. Second, academic self-efficacy in sport related majoring students had a significant effect on career decision attitude. Third, major satisfaction in sport related majoring students had a significant effect on career decision attitude. 이 연구의 목적은 체육계열 대학생들의 학업적 자기효능감과 전공만족도 및 진로결정태도의 관계를 구명하 는데 있었다. 이러한 연구목적을 달성하기 위하여 B시, Y시에 소재한 대학교 5곳에서 재학 중인 체육계열 대학생 382명을 편의표집방법(convenience sampling method)을 이용하여 표본을 추출하다. 수집된 자료는 Window용 SPSS 25.0 version을 이용하여 기술통계와 탐색적 요인분석, 신뢰도 분석, 상관관계분석, 표준중 다회귀분석(standard multiple regression analysis)을 실시하다. 이러한 연구방법과 절차를 통해 분석한 결론 은 다음과 같다. 첫째, 체육계열 대학생들의 학업적 자기효능감은 전공만족도에 유의한 향을 미친다. 둘째, 체육계열 대학생들의 학업적 자기효능감은 진로결정태도에 유의한 향을 미친다. 셋째, 체육계열 대학생들 의 전공만족도는 진로결정태도에 유의한 향을 미친다.
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유기농 콩 농경지에서 분리된 식물 생장 촉진 근권 미생물의 특성
이광민,한양수,김효진,남홍식,임정묵,김한신 한국미생물학회 2023 미생물학회지 Vol.59 No.4
Biofertilizer is a type of fertilizer that uses beneficial microorganisms to enhance plant growth and increase production. In this study, plant growth promoting bacteria and nitrogen fixation bacteria were isolated from organic soybean soil. Among them, the plant growth promoting bacteria with highest activities for 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, indole-3-acetic acid (IAA) production, and insoluble phosphate solubilization were selected. N6 (Bacillus cereus) and N48 (Neobacillus mesonae) have the highest production abilities of ACC deaminase and IAA production, respectively. N23 (Bacillus altitudinis) has the highest ability to solubilize insoluble phosphate. N57 (Enterobacter asburiae) isolated from soybean root nodules showed the highest nitrogen fixation ability. The maximum growth values of microorganisms were compared under various temperature (23–35°C) and pH (3–9) conditions. As a result, N6 and N23 showed the highest maximum growth value at 25°C, while N48 and N57 showed the highest maximum growth value at 35°C. Additionally, pH 7 was the optimal growth condition for four microorganisms. Under optimal growth conditions (35°C and pH 7), the ACC deaminase production of N6, IAA production of N23 and nitrogen fixation ability of N57 were approximately 1.2, 4 and 1.6 times higher, respectively, compared to the previous conditions (30°C and pH 7). Furthermore, the mixed strains showed enhanced plant growth promoting activity and nitrogen fixation ability more effectively than the individual strains. Therefore, these results suggest the possibility that biofertilizers using mixed strains may increase plant growth efficiency more than individual strains.
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이광민,이기원,박경덕,정준,차종한,신다미 한국신뢰성학회 2023 신뢰성응용연구 Vol.23 No.4
Purpose: Design failure mode and effect analysis (D-FMEA) in begins the early stages of design and is completed at the time when production drawings are published. However, in the case of research and development (R&D) projects for domestic ship weapon systems, it is difficult to return the design of D-FMEA results because the manufactured prototype is mounted on the warship in the force integration prototype. In addition, D-FMEA cannot be performed for all areas of a developing weapon system. Therefore, a plan to perform D-FMEA is proposed herein, including a procedure for selecting items for D-FMEA, for application on the R&D projects of domestic warship weapon systems. Methods: In this study, a procedure was proposed in consideration of regulations and guidelines and the development environment of domestic warship systems such as design and prototype production. In addition, a case in which potential defects and failure modes were prevented and managed in advance was presented by the D-FMEA implementation of the R&D projects of actual weapons systems. Results: The proposed D-FMEA target-item-selection procedure was explained, and D-FMEA analysis was performed on the selected items to derive a potential failure mode with a high risk priority number (RPN). The improved RPN was confirmed by presenting and applying a design change plan for the derived potential failure mode. Conclusion: The proposed procedure can be used to perform reliability tests for improving the potential defects identified via D-FMEA.
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