실험계획법을 이용한 Suspension Valve용 고탄소강 소재 개발

김주행(Juhaing Kim),권태환(Taewhan Kwon),김성수(Seongsoo Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

C-EPS ECU Housig 용 고방열 CNT/고분자 복합재료 개발

김대열(Daeyeol Kim),김주행(Juhaing Kim),박태원(Taewon Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

열전도성 고분자 복합소재는 경량화 및 간편한 작업성으로 금속 분야 를 대체 할 가능성을 보이고 있다. 현재 열전도성 고분자 복합소재 Nano Filler로 3000W/mk 의 고 열전도도를 보이는 Carbon Nanotube를 혼입한 연구가 활발히 진행 중이다. 그러나 연구 결과 Carbon Nanotube만을 혼입한 고분자 복합재료는 예상된 열전도도 와 비교하여 낮은 열전도성을 보이고 있다. 이에 본 연구는 폴리아미드 - 6소재에 Carbon Nanotube 외에 Graphite 분말과 Carbon Fiber를 첨가 하여 Micro Filler 와 Carbon Nanotube를 동시에 혼입한 Hybride Filler System을 적용하여 고열전도도 복합재료 소재를 제작 하였다 개발된 소재로 EPS(Electric Power Steering) 용 Heat Sink 를 제작 하여 방열 성능 확인 결과 Polyamide- 6와 Glass Fiber로 제작한 단품 대비 40%의 개선 효과를 얻었다.

자동차용 Heatsink의 열전도도 향상을 위한 다이캐스팅 알루미늄 합금 및 열처리 최적 조건 개발

김주행(Juhaing Kim),정경(Kyung Jeong),박석현(Seokhyun Park),정윤철(Yooncheol Jung) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6

As eco-friendly automobiles are expanded, electronic control systems are also required to have high performance. Therefore, ECUs and motors, which are essential for electronic control systems, require higher heat dissipation characteristics than conventional ones. In order to achieve high heat dissipation characteristics, it is necessary to improve the thermal conductivity of Heatsink itself, which is directly contacts the heat source and transfers heat quickly among various components. As the conventional Heatsink materials, aluminum alloys which have excellent thermal conductivity characteristics have been applied. In case of low-solute alloy, the thermal conductivity is the highest. However, in the case of automotive Heatsink, a very complicated shape is required, and in order to realize this, it is necessary to manufacture parts by die casting of a high-solute aluminum alloy. As a result, it has lower thermal conductivity than low solute aluminum alloy. In this study, the optimum alloy composition capable of high pressure casting with 7% Si content and T5 heat treatment were applied to achieve thermal conductivity of 178W/mK. This result is a high thermal conductivity characteristic of low-solute wrought aluminum alloy products, resulting in a 38% improvement over ADC12, a commercial die-cast alloy. At the same time, heatsinks for large-capacity motors(BSG) were developed by securing the same castability as ADC12.

시간동인 활동기준원가계산 기반 재가 방문간호센터 원가관리프로그램 개발 및 적용

김주행(Kim, Juhang),임지영(Lim, Ji Young) 한국간호과학회 2019 Journal of Korean Academy of Nursing Vol.49 No.5

Purpose: This study aimed to develop a web-based cost management program for visiting nursing centers (CMP-VNC), using time-driven activity-based costing (TD-ABC), and to analyze effects of the program. Methods: The CMP-VNC was developed using the combined prototyping approach and system developing life cycle method following four stages: need analysis with comprehensive literature reviews and focus group interviews, design and development of program algorithm, evaluation of the developed program validity using experts and users group, and application and effects analysis. The non-equivalent control group pretest-posttest design was used to analyze the effects of the program. The program demonstration was conducted for four weeks with 60 visiting nurses in 35 visiting centers. Results: The web-based program was developed. It has five interfaces with basic and special functions using TD-ABC, namely, input, visiting nursing activity, visiting nursing activity cost, cost efficiency, and cost calculation report. The experimental group showed significantly higher cost perception and cost confidence than control group. Conclusion: We found that the CMP-VNC can be an effective tool to increase visiting nurses’ competency of costing and enhance efficiencies of visiting nursing centers.

초소형 ABS/ESC 모터용 고 내구성 금속흑연 브러쉬 소재 개발

김대열(Daeyeol Kim),김주행(Juhaing Kim),박태원(Taewon Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

ABS(Anti-lock Brake System) 및 ESC(Electro Stability Control System) 은 자동차의 제동 성능 및 차량 자세제어를 향상시키는 System으로 점차 장착률이 증가되고 있고 자동차 엔진룸의 공간이 작아짐으로 인해 System의 소형화가 중요한 과제가 되고 있다. 그 중에 무게 및 부피 40%를 차지하는 Motor의 소형화를 위한 연구개발이 활발히 진행되고 있다. ABS/ESC Motor는 DC Motor로 통전성과 윤활성 역할을 하는 금속흑연 Brush가 필수적으로 필요하다. 동일출력에서 Motor의 소형화로 인해 Brush 단면적이 작아짐에 따른 Brush에 가해 지는 전류밀도 상승으로 Motor 회전시 Spark 발생이 증가함에 따라 전기적 마모를 촉진 시킬수 있다. 이에 본 연구는 Brush 에 가해지는 전류밀도가 증가하여도 정류자에 통전성과 윤활성을 향상시켜 Brush 마모를 줄이기 위해 Copper 함량, Copper의 분말 크기를 조절하여 Brush 미세조직과 물리적 전기적 특성과의 상관관계를 규명하여 마모를 최소화 시킬수 있는 조건을 선정하여 이들 Brush가 실제 Motor에서 기존 소재 Brush 특성과 동일한 특성을 나타내는지에 대해 Motor 내구시험 및 소음특성으로 판단 하였다. 또한 Motor에서 소음과 마모특성 차이를 규명하기 위해 Brush 및 정류자 표면의 피막을 관찰 하였다.

간호창업에 대한 리터러시 고찰

임지영,김주행,김슬기,Lim, Ji Young,Kim, Juhang,Kim, Seulki 한국가정간호학회 2018 가정간호학회지 Vol.25 No.2

Purpose: This study aimed to provide an overview of the present status of start-up literacy. Methods: The study selected literature from KoreaMed, RISS (Research Information Sharing Service), KISS (Korean studies Information Service System), KISTI (Korea Institute of Science and Technology Information), Ovid-MEDLINE (Medical Literature Analysis and Retrieval System Online), Embase, and Cochrane Library DB. Start-up curricula were collected from the homepage of nursing schools in Korea and the USA. Their contents were searched using Massive Open Online Course (MOOC) platforms; KOCW, K-MOOC, and Coursera. Results: Fifteen articles were selected through a systematic literature review. The main themes of nursing start-up were "driver," "barrier," "required competency," and "importance of education." The courses contained business planning, finance, marketing, leadership, and entrepreneurship. The main contents of MOOCs were similar. Conclusion: The results indicate the necessity to develop multi-scope nursing start-up education programs. Nursing start-up models integrated with appropriate business knowledge and skills in health care settings are needed. This study can be used as a guideline to design start-up education programs in nursing.

방문간호센터 경영효율성 개선 사례 분석: 경영 컨설팅 적용을 중심으로

임지영,김주행,김선희,Lim, Ji Young,Kim, Juhang,Kim, Seonhee 한국가정간호학회 2021 가정간호학회지 Vol.28 No.2

Purpose: This study aimed to present the management strategies necessary to improve the operational efficiency of visiting nurse centers and evaluate their effectiveness. Methods: The subjects of this study were visiting nurse centers registered as long-term care centers. Based on value chain analysis, cost information analysis, and data envelope analysis, the study was carried out according to the Magerison's management consulting procedure, for six months. This procedure comprised eight sub-steps of approach and application. Results: The following management strategies were agreed upon: establishment of a cooperative network with other visiting care centers, creation of high satisfaction of external customers by providing practical training to care workers, and making rehabilitation and exercise services as the core nursing activities to be focused on. Conclusion: The management consulting process and analysis method applied in this study can referred to as a useful methodological framework for revitalizing visiting nursing centers in the future.

간호창업 교육프로그램의 효과

임지영,김주행,김슬기,유정희,Lim, Ji Young,Kim, Juhang,Kim, Seulki,Yoo, Jung Hee 한국가정간호학회 2021 가정간호학회지 Vol.28 No.1

Purpose: This study was conducted to verify the effect of Start-Up NurseS (SUNS) program focused on the differences between the web-based group and mobile-based group. Method: This research was a randomized control trial with repeated measures design study using three group. Participants were 30 nurses of web-based group, 30 nurses of mobile-based group and 29 nurses of control group. Data were collected three times: before program, immediately after the program, 4 weeks. Results: The web-based group and mobile-based group showed a significantly higher values for entrepreneurial self-efficacy, intention immediately, 4 weeks after the program than control group. Conclusion: Applying SUNS can be effectively used across all range of nurses is recommended on improving nursing start-up competency.

사례기반 VR 프로그램을 활용한 비대면 정신간호실습 효과

이영신 ( Lee Young Shin ),김주행 ( Kim Juhang ),임지영 ( Lim Ji Young ),김근면 ( Kim Geun Myun ) 한국정신간호학회 2021 정신간호학회지 Vol.30 No.4

Purpose: This study was conducted to verify the effect of a simulation-based virtual reality psychiatric nursing education program Methods: This was a quasi-experimental study that used two groups and a pretest-posttest design. There were 35 nursing students in both the experimental and control groups. Data were collected between January 18 and February 28. The educational program was configured in four stages over four weeks. An afterprogram post-test was conducted for one week. Results: The experimental group showed significantly higher values for depression nursing knowledge (t=-3.96, p<.001), learning self-efficacy (t=-3.34, p=.001), and problem solving processes (t=-3.01, p=.004) than the control group. Conclusion: The educational program was found to be effective for nursing students' depression nursing knowledge, learning self-efficacy, and problem-solving processes. It is expected to be foundational material for developing various virtual reality-based simulation education programs.

임상간호사의 간호 원가인식 및 원가태도가 원가관리행동에 미치는 영향

임지영(Ji-Young Lim),김주행(Ju-Hang Kim),김근면(Geun-Myun Kim),유정희(Jung-Hee Yoo) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.5

본 연구는 간호사를 대상으로 원가인식, 원가태도가 원가관리행동에 미치는 영향을 파악함으로써 이를 통한 간호사의 원가관리 역량 개발을 위한 근거자료를 마련하고자 한 것이다. 자료수집은 1년 이상 병원 근무 경력을 가진 간호사 150명을 대상으로 하였다. 자료분석은 통계분석 프로그램을 이용하여 기술통계, 상관관계분석, 다중회귀분석을 이용하였다. 연구 결과 간호사의 원가인식, 원가태도 및 원가관리행동 간에는 모두 유의한 양의 상관관계가 있는 것으로 나타났다. 또한 원가인식과 원가태도 중 간호사의 원가관리행동에 영향을 미치는 요인은 원가태도인 것으로 파악되었다. 이에 본 연구의 결과가 간호사의 원가관리행동 향상 프로그램 개발의 근거 자료로 활용될 수 있을 것으로 기대하며, 개발된 교육 프로그램의 타당성과 효과성을 분석하는 중재 연구 또한 필요함을 제안한다. Purpose: The purpose of this study was to evaluate how the cost perception and the cost attitude of nurses have effect on cost management behavior. Methods: Participants were 150 nurses who had worked for more than 1 year in general hospitals. Data were collected from November 16 to December 11, 2015, using self-recorded questionnaires. Collected data were analyzed using descriptive statistics and multiple regression methods. Results: Cost management behavior was positively correlated with cost perception and cost attitude. Cost attitude was revealed as the variable having effect on cost management behavior. Positive cost attitude can induce desirable cost management. Conclusion: It is necessary to develop effective and systematic Cost Education Program for nurses. Our result is useful to develop cost Education program of clinical nurses, and can be expandable for a variety of fields in programs for nursing students, and nurse managers.