그린카 산업의 학제적 분석 방안에 관한 연구

최진호,정선양,박경배,장대철,조형례,강승규,Choi, Jinho,Chung, Sunyang,Park, Kyungbae,Jang, Dae-Chul,Cho, Hyeongrye,Kang, SeungGyu 기술경영경제학회 2014 Journal of Technology Innovation Vol.22 No.3

Climate change and low-carbon consumer movement is demanding proper response around the world while rising oil price increases consumers' needs for green car. As a preliminary study to establish an industrial platform for green car and bring out corporate strategies, this article aims to propose an academic research framework by using various methodologies including conceptual/mathematical modeling, system dynamics, and ABM from different angles. First, an analysis framework for the industrial platform was introduced to analyze green car cases, required elements were proposed, and econometrics was applied to build a basic model related to green platform (two-sided market). Also, to analyze from a dynamic perspective, a system dynamics model was applied to green car environment to build a system dynamics analysis model that is applicable to particular green car industry analysis. Lastly, an agent based model was used to study the way to activate the hybrid car market in Korea from individual consumers' perspective. Based on the result, vehicle policies that are either being enforced or planned to be enforced in the Korean HEV market can be analyzed.

질병관련 특성에 따른 암환자의 자기효능감, 자가간호행위, 외상 후 성장, 삶의 질

최진호,이선영,안병덕,Choi, Jinho,Lee, Sunyoung,An, Byungduck 한국호스피스완화의료학회 2016 한국호스피스.완화의료학회지 Vol.19 No.2

Purpose: This study examined self-efficacy, self-care behavior, posttraumatic growth, and quality of life in cancer patients and their levels by disease characteristics groups to identify patient groups that require psychosocial intervention. Methods: We surveyed 107 patients using a structured questionnaire about the four factors and analyzed the factors by stratifying the patients by the period after the cancer diagnosis, by stage and by current treatment status. Results: The mean score for self-efficacy was 37.78, and that for self-care behavior 49.96. Patients who were diagnosed less than one year ago scored higher on medication, a sub-category of self-care behavior, than the post-diagnosis period of 1~2 year group. The score was higher in the currently-treated group than the follow-up and distant metastasis groups. For posttraumatic growth, the mean was 56.17, and the factor was higher in the 1~2 year post-diagnosis group after than the less than one year group. The score was higher in the follow-up group than the currently-treated group. With regard to quality of life, the mean score was 25.79, and no significant correlation was found with disease characteristics. Conclusion: A shorter post-diagnosis period increased self-care behavior, and the greatest posttraumatic growth was reported by the 1~2 year post-diagnosis group. It may be necessary to provide cancer patients with an education program and other strategies less than one year after the diagnosis to improve self-efficacy and self-care behavior. To promote post-traumatic growth, it may be helpful to provide patients with psychosocial intervention within two years after the diagnosis.

의류 건조기 성능 향상과 공력소음 저감을 위한 원심팬의 날개 형상 최적화

최진호,유서윤,정철웅,김민규,이광호,Choi, Jinho,Ryu, Seo-Yoon,Cheong, Cheolung,Kim, Min-kyu,Lee, Kwangho 한국음향학회 2019 한국음향학회지 Vol.38 No.3

The purpose of this study is paper is to improve the flow performance and to reduce the aerodynamic noise of air discharge system consisting of a centrifugal fan, ducts and a housing for the clothes dryer. Using computational fluid dynamics and acoustic analogy based on FW-H (Ffowcs-Williams and Hawkings) Eq., air flow field and acoustic fields of the air discharge system are investigated. To optimize aerodynamic performance and aerodynamic noise, the response surface method is employed. The two factors central composite design using the inflow and outflow angles of fan blades is adopted. The devised optimum design shows the reduction of turbulent kinetic energy in the ducts and the housing of the system, and as a result, the improved flow rate and reduce noise is confirmed. Finally, the experment using the proto-type manufactured usign the optimum design shows the increase of flow rate by 4.2 %.

A Review on the Ecology Approach of Sport

최진호(Jinho Choi) 한국레저사이언스학회 2021 한국레저사이언스학회지 Vol.12 No.1

스포츠로 인한 자연환경의 변화는 스포츠, 선수, 조직, 그리고 참여자에게 영향을 주고 있다. 스포츠의 잠재성을 고려해 볼 때 향후 스포츠의 자연 의존성은 점차 증가하게 될 것이며, 4차 산업혁명의 도래와 함께 신물질과 제품들의 개발은 자연환경에 지속적으로 더 큰 부담을 주게 될 것이다. 이 연구는 기존의 스포츠와 자연환경의 이슈를 연구해 왔던 기존의 연구들과는 차별화된 학문적 시각으로 생태학적 접근을 통해 스포츠와 자연환경의 관련성을 고찰해 보고자 한다. 결론적으로, 첫째, 스포츠와 환경 생태학적 접근을 통한 스포츠 환경법 적용이 절실히 필요하다. 둘째, 스포츠 지속가능성을 위한 사회 전반적인 자연환경윤리의식이 요구된다. 셋째, 스포츠 소비로 인해 발생하는 유해물 질을 최소화할 수 있는 기술적 연구와 지원이 필요하다. Changes in the natural environment caused by sports are conversely affecting sports, athletes, organizations, and participants. In the future, considering the potential of sports, the dependence of sports on nature would increase, and the development of new materials and products with the advent of the 4th industrial revolution would continue to put a greater burden on the natural environment. This study attempted to consider the relationship between sports and the natural environment through ecological approach from academic perspective, unlike studies that have dealt with existing sports and natural environment issues. In conclusion, first, it is desperately needed to apply the sport environment law through sports and ecological approach. Second, consciousness of natural environmental ethics in society is needed for sport sustainability. Third, there is a need for technical researches and supports to minimize harmful substances generated by sports consumption.

Zinc nitrate 용액을 이용한 염료감응형 태양전지 반사 방지막에 관한 연구

최진호(Jinho Choi),서현웅(Hyunwoong Seo),손민규(Min-Kyu Son),김수경(Soo-Kyoung Kim),김병만(Byung-Man Kim),김희제(Hee-Je Kim),프라바카르(Kandasamy Prabakar),김종락(Jong-Rak Kim) 대한전기학회 2012 전기학회논문지 Vol.61 No.5

An anti-reflection layer (AR) is used in the solar cell to improve the amount of the irradiated light, resulting in the improvement of the performance of the solar cell. In this study, the zinc oxide (ZnO) AR is applied to the dye-sensitized solar cell (DSC) by using zinc nitrate solution. The conditions such as solution concentration and sintering temperature for fabricating the ZnO AR are changed to optimize the performance of the AR. As a result, the best performance is shown when the zinc nitrate solution with 100mM concentration is used and the sintering temperature is 600℃. And then, the ZnO AR formed with these optimal conditions is applied to the DSC. Consequently, a DSC with a ZnO AR had an increased current density up to 13.86㎃/㎠ and an enhanced efficiency of 6.32%.

공차의 영향을 고려한 차량 해석 및 설계

최진호(JinHo Choi) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Tolerance analysis and design schemes are essential for designers to allocate tolerances properly and efficiently for vehicle systems considering uncertainty in the process of manufacturing and assembling. Tolerances on vehicle components may cause mechanical errors of appreciable magnitude which deteriorate the performance of a vehicle system. Since these tolerances have a random nature, variation analysis should be performed to develop a vehicle system for minimizing cost while satisfying the desired performance. This study addresses vehicle analysis and design considering effect of tolerance in the process of manufacturing and assembling based on Computer-Aided Engineering (CAE).

멀티코어 프로세서에서 GILS를 이용한 유도조종장치 탑재 소프트웨어 검증

최진호(Jinho Choi) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.12

타임드 오토마타 모델로부터 VxWorks 기반 코드의 체계적 생성

최진호(Jinho Choi),지은경(Eunkyoung Jee),배두환(Doo-Hwan Bae) 한국정보과학회 2013 정보과학회 컴퓨팅의 실제 논문지 Vol.19 No.2

타임드 오토마타 모델 기반 개발 방법을 지원하는 TIMES 도구는 실시간 소프트웨어에 대한 모델 명세, 시뮬레이션, 검증, BrickOS 기반 코드 생성 기능을 가진다. BrickOS 기반 코드는 엄격한 실시간 제약성을 만족하지 않아서 실시간 속성 만족이 중요한 시스템 개발에 BrickOS 기반 코드를 그대로 사용할 수 없다. 본 논문에서는 실시간 내장형 소프트웨어 개발을 위해서 TIMES 도구를 활용하여 타임드 오토마타 모델로부터 BrickOS 이외의 플랫폼 기반 코드를 생성하기 위한 방안을 제안한다. BrickOS 플랫폼 독립적인 코드는 그대로 활용하면서 플랫폼 의존적인 코드들을 대상 플랫폼으로 변환시키는 가이드라인을 제안한다. 정속 주행 장치 소프트웨어 사례 연구에서 제안 가이드라인을 통해 생성된 VxWorks 기반 코드가 모델 명세대로 내장형 시스템에서 정상적으로 동작함을 확인하였다. The TIMES tool supports timed automatadriven development by supporting system specification, simulation, verification, and code-generation for BrickOS platform. BrickOS-based code is not suitable for being used in the development of hard real-time systems because it does not satisfy hard real-time constraints. To tackle this problem, we propose four guidelines for generating platform-based code from BrickOS-based code. The proposed guidelines convert BrickOS-dependent code into VxWorks-based code while utilizing platformindependent code as it is. We conduct a case study for cruise control system software to demonstrate that the generated VxWorks-based code executes in a real-time embedded system environment as specified in timed automata models.

딥러닝 기법과 잔차 크리깅을 이용한 지가 예측

최진호(Jinho Choi),김용구(Yongku Kim) 한국데이터정보과학회 2021 한국데이터정보과학회지 Vol.32 No.3

본 연구에서는 지가 예측의 고도화를 위하여 딥러닝 기법과 잔차 크리깅을 결합한 DNNRK 모형을 제안하고 그 성능을 검증하였다. 연구지역은 서울시 강남 3구이며 가격자료는 감정평가사가 평가한 표준지 공시지가를 기반으로 하였다. 제안된 모형의 성능은 검증 데이터에 대한 선형회귀모형, 회귀크리깅, 딥러닝의 예측결과를 통계적 지표 (MAE, RMSE, MAPE, COD) 비교를 통해 평가하였다. 모형 성능을 비교한 결과, DNNRK 모형의 가격 예측력이 다른 모형과 비교하여 우수함을 확인할 수 있었다. 본 연구에서는 지가가 물리적 속성 정보뿐만 아니라 위치 정보에 영향을 받는다는 개념을 고려하여 제안된 DNNRK 모형을 적용되었다. 따라서 이러한 결과는 지역 요인으로 대표되는 공간적 상관성을 모형에 투입할 경우 지가 예측력의 상승 효과를 가져온다는 것을 의미한다. This study is propose the conjunction models of deep neural network and residual kriging (DNNRK) for advancement of land price estimation and validate its performance. Seoul (Gangnam 3 District) was chosen as a study area and we collected land prices of standard lots estimated by appraiser. When inspecting the model performance based on the test data, we confirmed that the land price accuracy form the DNNRK model was improved substantially compared with that of the OLS, DNN and RK. Therefore, these results indicate that introducing spatial autocorrelation as a location factor to models can improve the performance of land price prediction significantly. Furthermore, DNNRK model coupling DNN and residual kriging can be an effective alternative for estimating the land price accurately.

전자현미경 영상을 이용한 나노 비주얼 서보잉

崔振鎬(Jinho Choi),安商丁(Sang Jung Ahn),朴丙天(Byong Chon Park),柳?(Joon Lyou) 대한전기학회 2008 전기학회논문지 Vol.57 No.10

Nano manipulator is used to manufacture Carbon Nano'Tube (CNT) tips. Using nano manipulator, operator attaches a CNT at the apex of Atomic Force Microscope(AFM) tip, which requires a mastery of mechanics and long manufacture time. Nano manipulator is installed inside a Scanning Electron Microscope (SEM) chamber to observe the operation. This paper presents a control scheme for horizontal axes of nano manipulator via processing SEM image. Edges of AFM tip and CNT are first detected, and the position information so obtained is fed to control horizontal axes of nano manipulator. That is, a visual servoing loop is realized to control the axes more precisely in nano scale.