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이성혁(Seong Hyeok Lee),정영남(Young Nam Jung),임상진(Sangjin Lim),조호진(Hojin Cho),임유진(Yujin Lim) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
본 연구에서는 터널구간에 적용할 직결 아스팔트 노반 궤도의 최적 두께 결정을 위한 설계차트를 개발하기 위하여, 주요 설계인자로서 궤도구조형식, 윤중 및 속도, 년간 통과톤수(MGT), 재료 물성(원지반 및 콘크리트 보조도상 탄성계수), 아스팔트 노반층의 두께 등을 설정하였으며 이들 설계인자의 조합을 달리하면서 윤중 재하시 아스팔트 노반하면에서의 인장변형률을 ABAQUS 3D 구조해석을 통해 분석하였다. 구조해석 분석결과와 손상도 이론에 의한 Miner법칙을 활용하여 터널구간용 직결 아스팔트 궤도구조(단면구성)에 대응하는 설계수명(내구년한) 결정 설계차트를 개발하였다. In this study, primary design parameters such as types of track section, wheel load size, velocity, MGT, elastic modulus and thickness of each layers are defined for optimum design of asphalt thickness adapted in the asphalt trackbed foundation in tunnels. 3D FEA were performed using ABAQUS program to compute tensile strain under asphalt layer with different values of design parameters defined. Using Miners’ theory with computed structural analysis results, design charts to decide design life of asphalt trackbed foundation in the tunnels are produced.
종양내과병동 간호단위 핵심간호실무 학습프로그램 개발 및 평가
김연희(Kim, Yeon Hee),정영선(Jung, Young Sun),이순행(Lee, Soon Haeng),김경옥(Kim, Kyoung Ok),정영남(Jeong, Young Nam),정혜련(Jung, Hye Ryun),김경희(Kim, Kyunghee) 대한종양간호학회 2013 Asian Oncology Nursing Vol.13 No.4
Purpose: This study was conducted to develop a nurse-learning program for the pain management of cancer patients. Methods: In this methodological study, a learning program was developed between January and June 2011, following the methodological procedure based on the ADDIE Instructional System Design. Results: The learning program consists of 4 parts: learning goal, learning outcomes, learning method, and evaluation method. Learner-centered learning goal and learning outcomes were established, and lecturebased group learning and self-directed study were combined as the learning method. For the evaluation, we developed a written test, a nursing skill checklist, and a case report evaluation tool. After a pilot test, the learning program was assessed by an expert group for its construct validity and content-related conformance. Moreover, the effectiveness of the program was validated by the results of the learning outcomes evaluation and the achievement levels of 40 trainees who participated in the program. Conclusion: On the basis of the results of this study, we suggest that this unit-based core nursing practice learning program, comprising 202 nursing units developed by a research institute nursing department since 2010, be shared by all nurses in clinical nursing care settings to improve their practical performance and ensure necessary specialization.
음극 아크 이온플레이팅법에 의한 박막상의 Microdroplets에 관한 연구
백영남,정창준 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.-
To measure the mechanical properties of titanium nitride films, on the silicon wafers, TiN films were coated by cathode arc ion plating(CAIP) method. The silicon wafers were selected for the calculation of the growing structure, microdroplets and roughnesses of titanium nitride films. The experimental variables were the substrate bias voltages, arc currents, distances between the target and substrate, and jig rpm. The morphologies of TiN films that surveyed by SEM. The creation of the microdroplet reduced with respect to the increase of the bias voltages, jig rpm and distances between the target and substrate, but the microdroplets were multiplied when the arc currents increased. The surface roughness of TiN films were under the influence of the droplets, and improved with increasing the bias voltages and distance between the target and substate, but the roughness became rough as the arc currents were increased.