CMMI 기반 프로세스 지원 시스템 설계

최동희,Choi, Dong-Hee 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.3

In this paper, I have proposed a design of process support system based on CMMI process which can support integrated management and repository for CMMI model processes. The system assists small organization to improve business process and offers institutionalized automatic environment to users for use of CMMI processes. The proposed system also can enhance quality and productivity of project by including features such as convenience of project management, planned project administration and steady process improvement.

족삼리(足三里), 합곡(合谷) 침자(鍼刺)가 상치(上齒), 하치부(下齒部) 동통(疼痛) 억제(抑制)에 미치는 영향(影響)

최동희,김원재,나창수,Choi Dong-Hee,Kim Won-Jae,Na Chang-Su 경락경혈학회 2001 대한침구의학회지 Vol.18 No.1

The pain was induced on upper and lower incisor of the rat based on the theory of 'connections of upper incisor pain with stomach meridian and lower incisor pain with large intestine meridian'. Such acupoints as ST36 and LI4 were used for alleviation of upper and lower incisor pain. The digastric myogram (dEMG) was utilized for the pain measurement. The upper incisor pain was gradually decreased during ST36 stimulation and significant differences were observed at 20 and 25 minute point during 60 minutes study. The upper incisor pain was gradually decreased during LI4 acupuncture and 20 minute was the only point that showed a significant difference. The alleviation of lower incisor pain was not obvious during the ST36 acupuncture. The lower incisor pain was gradually decreased during LI4 stimulation with significant differences at 15, 20 and 40 minute point. In conclusion, the upper incisor pain was relieved with ST36 and LI4 acupuncture while LI4 was effective on the lower incisor pain alleviation based on the theory of 'connections of upper incisor pain with stomach meridian and lower incisor pain with large intestine meridian'.

홈 게이트웨이에서의 입력 트래픽에 관한 적응적 대역폭 제어 시스템

최동희,김성훈,박홍성,Choi Dong-Hee,Kim Seong-Hoon,Park Hong-Seong 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.5b

이 논문은 VOD 서비스와 가전기기들의 제어가 가능한 홈 게이트웨이를 고려하였다. 홈 게이트웨이에서 출력 트래픽 제어를 통해 VOD 와 실시간 제어 데이터와 같은 입력 트래픽의 QoS를 보장하면서 CPU 연산 시간에 적게 영향을 줄 수 있는 PID 알고리즘 기반의 적응적 대역폭 제어 방법을 제안하였다. 제안하는 방법을 실제 테스트 환경에서 구현하여 검증하였다. This paper considers a home gateway(HG) that processes VOD services and controls home appliances. This paper proposes a PID algorithm-based adaptive bandwidth control method used in the HG, which guarantees QoS of incoming traffic such as VOD and real-time control data via control of outgoing traffic and have little effects on the CPU computation time. The proposed method is validated via implementation of real test environment.

태충 침자가 간 미토콘드리아 내 Complex IV에 미치는 영향

최동희,이유미,김미래,박정혜,김혜란,나창수,윤대환,Choi, Donghee,Lee, Yumi,Kim, Mirae,Park, Jeonghye,Kim, Hyeran,Na, Changsu,Youn, Daehwan 경락경혈학회 2019 대한침구의학회지 Vol.36 No.4

Objectives : The liver is rich in mitochondria and it plays a key role in whole-body energy homeostasis. Mitochondria is double membrane-bound organelle that supplies energy for intracellular metabolism including Krebs cycle and beta-oxidation. Acupuncture is known to stimulate and regulate the flow of energy. To explore the effect of acupuncture on the mitochondrial respiratory chain activity in the rats' livers, the activity of mitochondrial respiratory chain complexes I to IV was observed. Methods : The rats were divided into 4 groups; Normal 1 (no acupuncture treatment and anesthesia for 5 min), Normal 2 (no acupuncture treatment and anesthesia for 10 min), MA1 (acupuncture treatment at bilateral LR3 under anesthesia for 5 min), and MA2 (acupuncture treatment at bilateral LR3 under anesthesia for 10 min). All rats were sacrificed and the livers were examined for respiratory chain change. Results : There was no difference in ubiquinon oxidoreductase, succinate dehydrogenase, and ubiquinol cytochrome C oxidoreductase after acupuncture at LR3. Acupuncture at LR3 for 10 min increased the activity of cytochrome C oxidase compared with no acupuncture groups. Conclusions : Acupuncture at LR3 mediated mitochondrial respiratory chain activity via the cytochrome C oxidase signaling pathway in the livers of rats.

인간 포배란의 유리화동결 융해 후 임신 및 분만에 관한 연구

최동희,정형민,정미경,이숙환,남윤성,박찬,곽인평,윤태기,Choi, Dong-Hee,Chung, Hyung-Min,Chung, Mi-Kyung,Lee, Sook-Hwan,Nam, Yoon-Seung,Park, Chan,Kwak, In-Pyung,Yoon, Tae-Ki 대한생식의학회 2000 Clinical and Experimental Reproductive Medicine Vol.27 No.4

Objective: This study was performed to evaluate whether vitrification method could be used for the cryopreservation of human blastocysts derived from IVF program. Methods: Surplus embryos were obtained from consented IVF patients. Controlled ovarian hyperstimulation was done with midluteal GnRH agonist, gonadotropin and hCG. After oocyte retrieval and insemination, fresh embryo transfer was done at $4{\sim}8$ cell stage. The surplus embryos after ET were cultured in blastocyst medium up to 6 days after oocyte retrieval. Obtained blastocysts were cryopreserved with our vitrification method. Blastocysts were exposed to 1.5 Methylene glycol (EG) in phosphate buffered saline (PBS) for 2.5 minutes, followed by 5.5 M EG plus 1 M sucrose for 20 seconds. Then 1 to 3 blastocysts were mounted on electron microscope (EM) grid and the grid was plunged into liquid nitrogen for storage. For thawing, blastocyst-containing EM grids were sequentially transferred in 1.0 M, 0.5 M, 0.25 M, 0.125 M and 0 M sucrose solution at the intervals of2.5 minutes. And blastocysts were cultured for about 6 hours and only re-expanded blastocysts were transferred to uterus of the patients on 4 to 5 days after ovulation in natural cycle or on 18 to 19 day of artificial cycle. Results: From Oct. 1998 to Jul. 1999, 34 patients were agreed to participate in this study. The mean age and duration of infertility of the patients were 31.6 years and 4.1 years, respectively. Among 34 cycles. replacements could be done in 20 cycles (58.8%). A total 93 blastocysts were thawed and 48 (51.6%) of them survived. Thirty-eight blastocysts, mean 1.9 embryos per patient, were transferred, resulting in 5 clinical pregnancies which consisted of 1 triplet, 2 sets of twins and 2 singleton pregnancies. The pregnancy rate per transfer was 25% and implantation rate was 23.6%. Five patients delivered 7 healthy babies including 2 sets of twins at term. Conclusion: Successful pregnancies and deliveries were established after transfer of vitrified human blastocysts. Vitrification using ethylene glycol as cryoprotectant and electron microscope grid is a rapid and simple method that can be effectively applied for the cryopreservation of human blastocysts.

온라인축제 평가속성, 축제만족, 방문의도 간의 영향 관계 연구

최동희 ( Choi Dong-heui ) 한국관광산업학회 2021 Tourism Research Vol.46 No.2

최근 연구는 코로나19 상황 속에서 지역축제들이 온라인으로 개최되고 있다. 온라인축제 기존의 지역축제와 같이 지역 관광상품으로써의 역할을 하는지 점검할 필요가 있을 것으로. 그러므로 본 연구의 목적은 코로나19 상황에서 개최되고 있는 온라인축제에 대한 평가속성이 축제만족에 미치는 영향과 그에 따른 축제만족이 방문의도에 미치는 영향에 대한 실증분석을 하고자 하였다. 이를 통해 향후 온라인축제 기획 및 운영에 있어 올바른 방향을 제시하고자 하였다. 연구의 대상으로는 광주세계김치 랜선축제 서포터지 230명에 대하여 실증 조사와 통계분석을 시행하였으며, 분석 결과 온라인축제 평가속성은 콘텐츠, 디자인, 편리성, 신뢰성 4개 요인으로, 축제만족과 방문의도는 단일요인으로 나타났다. 또한 온라인축제 평가속성 모든 요인이 축제만족에 영향을 미쳤으며, 그중에서도 콘텐츠가 가장 큰 영향을 미치는 것으로 나타났다. 그리고 축제만족도 방문의도에 영향을 미치는 것으로 나타났다. 본연구결과, 온라인축제라 할지라도 축제의 주제와 개최목적을 반영한 콘텐츠 기획과 방문객들에게 재미와 흥미를 유도할 수 있는 구성과 운영이 필요할 것이다. 더불어 이를 통하여 축제에 만족한 방문객은 축제 개최장소를 찾는 계기가 마련될 것으로 사료된다. This study wanted to demonstrate the impact of the evaluation attributes of online festivals held in the Covid-19 situation on festival satisfaction and the consequent effect of festival satisfaction on visit intention. Through this, it was intended to provide the right direction for future online festival planning and operation. Among the subjects of the study, 230 supporters of the Gwangju World Kimchi LAN Festival were conducted an empirical survey and statistical analysis. According to the analysis, online festival evaluation attributes were four factors: content, design, convenience, and reliability, and festival satisfaction and visit intention were single factors. In addition, all factors of online festival evaluation attributes influenced festival satisfaction, among which content had the biggest impact. And festival satisfaction has also been shown to affect visitation intentions. As a result of this study, even online festivals will require content planning that reflects the theme and purpose of the festival, and composition and operation that can induce fun and interest to visitors. In addition, visitors who are satisfied with the festival will be provided with an opportunity to visit the venue for the festival.

FACTS를 이용한 유효송전용량 증가를 통한 과도안정도 분석

최동희(DongHee Choi),정광우(Kwang Woo Joung),박정욱(Jung-Wook Park) 대한전기학회 2015 대한전기학회 학술대회 논문집 Vol.2015 No.7

약지도 학습을 사용한 육계의 공간 분포 추정

최동희 ( Donghee Choi ),오강한 ( Kanghan Oh ) 한국농공학회 2022 한국농공학회 학술대회초록집 Vol.2022 No.-

최근 농촌은 인구 인구감소와 고령화로 인해 인력 부족 현상을 겪고 있다. 현재 이 문제를 극복하기 위해 기계 및 인공지능 소프트웨어 기술을 활용한 스마트 정밀 농업기술들이 개발되고 있다. 육계 산업 분야에서는 머신 비전 기술을 활용하여 계사 관리 자동화를 시도하고 하였고 유의미한 발전이 있었다. 특히 육계의 공간적 분포를 자동으로 추정하는 기술은 육계 산업 분야 종사자들에게 계사 관리자에게 유용한 정보를 제공해 줄 수 있어서 연구가 활발히 진행되는 분야이다. 하지만 기존 연구들은 최신 기술이면서 강력한 성능을 지닌 심층 학습 기법을 사용하기보단 전통적인 머신 비전 기술을 사용하고 있는 한계점도 존재한다. 심층 학습은 기본적으로 사용자가 해답을 만들어서 제공해야 하는 지도 학습 방법론이다. 하지만 실시간 프레임 단위로 들어오는 계사 영상에서 일일이 육계의 위치를 레이블링하는 일은 비효율적이며 노동집약적이다. 본 연구에서는 약지도 학습 기법을 사용하여 육계의 공간적 분포를 추정하는 기술을 제안한다. 먼저 계사에서 육계의 존재 여부에 따라 영상 데이터를 구분하고 심층 학습을 사용하여 육계의 존재 여부를 인식하는 학습 모델을 구축한다. 다음 설명 가능 인공지능 모델을 사용하여 학습된 분류 모델을 해석하여 육계의 위치를 열 지도 형태로 반환한다. 정성적 시각화 평가 결과에서는 육계가 몰려있는 위치에 적합한 열 지도를 생성하는 것을 확인하였으며, 특히 계사의 조명이 꺼진 상태나 카메라에 이 물질이 붙어 노이즈가 발생한 상황에서는 육계의 위치를 추정하는 결과를 확인하였다. 향후 연구에서 정량적 평가 기준을 사용하여 평가하고 분포 추정 알고리즘을 개선하면 더 정확한 결과를 산출할 수 있을 것으로 판단된다.

실험과 CFD를 활용한 건물 내 미세먼지 재부유 및 확산해석 방법

최동희(Choi, Dong-Hee),강동화(Kang, Dong-Hwa) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.10

The objective of the study is to develop methodology to evaluate particle resuspension and dispersion in building environment. Experimental chamber system to measure particle resuspension rates from reservoir materials was suggested. The resuspension chamber was designed to provide both aerodynamic disturbance and mechanical disturbance to cause particle resuspension. The particle disperser chamber system was also suggested for preparation of dust loaded reservoirs. The results from the chamber experiment showed that the resuspension chamber system can characterize resuspension rates of quartz from stainless steel plate, carpet and linoleum. It also showed that particle resuspension rates differ from reservoir materials to materials. For evaluation of indoor particle dispersion, computational fluid dynamics (CFD) technique based on Lagrangian method was suggested. The CFD model was validated by comparing the simulated results with the experimental data including the distribution of indoor particle concentration

접근제어 정책 구현을 위한 주체기반 XML 암호화

최동희(Dong-Hee Choi),박석(Seog Park) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.2004 No.5