전력 계통 과도상태 안정화를 위한 비선형 적응 백스테핑 제어기 설계

金東憲(Dong-Hun Kim),金洪必(Hong-Pil Kim),梁海元(Hai-Won Yang) 대한전기학회 2000 전기학회논문지A Vol.49 No.7

진주시 수돗물 불소농도조정사업의 11년간 비용편익 분석

김만경 ( Man Kyong Kim ),정지인 ( Ji In Jung ),김민지 ( Min Ji Kim ),전은주 ( Eun Joo Jun ),김한나 ( Han Na Kim ),김세연 ( Se Yeon Kim ),한동헌 ( Dong Hun Han ),정승화 ( Seung Hwa Jeong ),김진범 ( Jin Bom Kim ) 대한예방치과·구강보건학회 2014 大韓口腔保健學會誌 Vol.38 No.2

Objectives: The aim of this study was to estimate the economic costs and benefits of a water fluoridation program in the city of Jinju, Korea. Methods: In 2009, dental surveys were conducted on 2,315 children aged 6-12 years in Jinju, which had been fluoridated for 11 years. The decayed/missing/filled teeth (DMFT) scores of children in Jinju were compared to the DMFT scores of same-aged children in non-fluoridated small- and mediumsized cities in the fourth Korean National Health and Nutrition Examination Survey conducted from 2007 to 2009 by the Korea Centers for Disease Control and Prevention. The reduced number of decayed permanent teeth by the water fluoridation program was estimated as the difference between the DMFT scores of children in Jinju and those in non-fluoridated small- and medium-sized cities. The economic benefits were estimated by the savings from reduced dental treatment costs by using the reduced number of decayed permanent teeth from the water fluoridation program. All annual costs and benefits were calculated from 1998 to 2009. The social rate and untreated rate of decayed teeth were applied as 3% and 20%, respectively. The annual benefit-cost ratio was estimated by using the annual benefits and cumulative program costs. Results: The economic benefit in 2009 from a water fluoridation program was estimated as 57,496,000,000 Korean Won (KRW), and the cumulative cost in 2009 was estimated as 1,387,000,000 KRW. The net present value in 2009 from a water fluoridation program was 56,109,000,000 KRW. The benefit-cost ratio in 2009 was estimated as 41.4. Conclusions: The economic benefit of a water fluoridation program in Jinju city was evaluated as excellent.

아이폰 기반의 이동로봇 시뮬레이터 개발

김동헌(Dong Hun Kim) 한국지능시스템학회 2013 한국지능시스템학회논문지 Vol.23 No.1

본 논문은 애드혹 통신을 기반으로 아이폰의 가속도 센서를 사용하여 이동로봇을 무선 제어하는 연구에 대하여 다룬다. 이동로봇을 아이폰으로 무선제어하기 위한 방법으로 사용자 원격제어와 자율제어 방법이 제안되었다. 궤적 추종제어 알고리즘의 효율성을 평가하기 위하여 아이폰의 인터페이스를 기반으로 모니터에 그려진 궤적을 가상로봇이 추종하는 시뮬레이터를 개발하였다. 제안된 시뮬레이터에서는 궤적 추종제어를 위해 이동로봇을 제어할 때 컴퓨터에서 해당 알고리즘을 이용하여 미리 시뮬레이션이 가능하며 사용자에 의한 원격제어와의 결과 비교도 보여준다. 연구의 결과로 제안된 시뮬레이터가 이동로봇에 자율이동제어 방법을 사용할 때, 자율추종 알고리즘의 적합성과 효율성을 미리 검사 하는데 사용될 수 있음을 보여준다. This study presents the remote control of a mobile robot using iPhone based on ad hoc communication. Two control interfaces are proposed to control a mobile robot using iPhone : Remote control by a user and autonomous control. To evaluate the effectiveness of algorithms for trajectory following, a simulator are developed where a virtual robot follows a referenced trajectory in a monitor by iPhone interface. In the proposed simulator, some algorithms are tested how they work well or not for trajectory following of a mobile robot. Comparative results by remote user control and autonomous control are shown. Results of an experiment show that the proposed simulator can be effectively used for testing the effectiveness of autonomous tracking algorithms.

자동차 클러스터의 감시 및 제어를 위한 모델기반설계 기법 연구

김동헌(Dong Hun Kim) 한국지능시스템학회 2017 한국지능시스템학회논문지 Vol.27 No.1

본 연구는 모델기반설계 기법을 이용하여 자동차 클러스터의 감시 및 제어를 하는 스테이션을 설계한다. 설계 도구로 매트랩 GUI(Graphic User Interface), M 프로그램, 시뮬링크(simulink), 스테이트 플로우(state flow), 툴박스(tool box)를 사용하여 실제 자동차 클러스터 시스템과 연동하여 자동차에서 들어오는 경고, 인터럽트 등의 각종 정보 등을 감시한다. 감시 수단으로는 PC(Personal Computer) 스테이션을 사용하여 자동차 클러스터 설계 시 툴 박스의 인터페이스 명령함수가 실제 자동차 클러스터 시스템과 연동하게 한다. 따라서, 기존의 텍스트 방식과 달리 모델기반설계로 개발된 자동차 클러스터 시스템은 각 기능 및 알고리즘을 블록과 상태플로우로 프로그램에 따라 작성하기 때문에 알고리즘의 수정이나 기능 추가가 용이하며, 또한, PC를 통해 모니터 상에서 동작 알고리즘을 검증하기 때문에 클러스터의 개발과 수정에 따른 많은 시간과 비용을 절감할 수 있는 효과를 준다. This paper presents the development of a monitoring and control system for a vehicle cluster using a model-based design technique. For MBD(model-based design), MATLAB GUI(Graphic User Interface), M programs, simulink, state flow, and tool boxes are used to monitor a number of data such as warning, interrupts, and etc. connected to a real vehicle cluster. As a monitoring tool, a PC(Personal Computer) station interworks with the real vehicle cluster through the interface commands of tool boxes. Thus, unlike existing text-based designs, the MBD based vehicle cluster system provides very easy algorithm updates and addition, since it offers a number of blocks and state flow programs for each functional actions. Furthermore, the proposed MBD technique reduces the required time and cost for the development and modification of a vehicle cluster, because of verification and validation of the cluster algorithm on the monitor through a PC.

울산광역시 장애인 구강건강증진을 위한 자원봉사 중심의 지속적 치과진료사업의 사례

김진범(Jin-Bom Kim),김병재(Byung-Jae Kim),한동헌(Dong-Hun Han),전은주(Eun-Joo Jun),김한나(Han-Na Kim),김민지(Min-Ji Kim) 대한치과의사협회 2015 대한치과의사협회지 Vol.53 No.11

The purpose of this study was to evaluate the oral health promotion of the disabled persons by voluntary dental services in Ulsan Metropolitan City. Two dentists taken a calibration training for national oral health survey examined the oral health status of 473 disabled persons from two special schools for the disabled children and adolescents, a residential facility and a gymnasium for the disabled persons in 2009-2010. The surveyed disabled persons in the age range was from 7 to 74 years old. Voluntary dentists, oral hygienists and other civilian volunteers had supplied with the oral health care services to the disabled persons at dental clinics of special schools for the disabled children and adolescents, and a dental clinic supported from Nam-Gu Public Health Center in Ulsan Metropolitan City since 1997. The obtained data from these surveys were analyzed with the SPSS statistical package. Among subjects aged 12-14 years, subjects with decayed, missing and filled teeth (DMFT) in permanent dentition was 46.9%; subjects with untreated decayed teeth, 17.2%. The number of decayed, missing and filled teeth in permanent dentition was 1.36. The proportion of decayed components of DMFT score was 28.00%; proportion of missing components of DMFT score, 1.43%; proportion of filled components of DMFT score, 70.57%. The proportion of filled components of DMFT score among disabled persons of all age group in Ulsan were evaluated to be a similar level to non-disabled citizens in Ulsan from 2010 Korean National Survey. The oral health care programs for disabled persons by voluntary services of dental professionals and other civilians are evaluated to be effective for the oral health promotion of disabled persons in Ulsan.

직진 주행 차량의 강인 적응제어 구조설계

金東憲(Dong-Hun Kim),梁海元(Hai-Won Yang) 대한전기학회 2001 전기학회논문지 D Vol.50 No.1

조직설계 측면에서 본 비서직의 편제에 관한 연구

김동헌(Dong-Hun Kim) 한국비서학회 2002 비서·사무경영연구 Vol.11 No.1

The primary purpose of this study is to research the table of organization of secretaries in an organization, on the side of organizational design and to suggest alternatives. Secretarial services as a job has some special characteristics of its own. The demand of secretarial manpower for an enterprise is comparatively small and sporadic in comparison to that of others. Even though there is no exclusive secretarial services firm or industry, there are secretarial job positions in many firms and organizations. The above mentioned are special features of secretarial services. However, due to the reasons mentioned above, organizational structure is comparatively underdeveloped. In the view point. of organizational design and structure, secretarial functions are neither horizontally differentiated nor vertically differentiated. The degree of formalization of secretarial functions is comparatively low. There are few organization that put the secretarial department as an independent unit in its organization chart, even though the organization employs secretarial functions. The. secretarial organization structure can be considered as a sort of hardware and the ability, skill and knowledge of a secretary is considered as a sort of software. Secretarial services has been well developed as software and as a result of that, many managers in organizations became more aware of the necessity of secretarial functions than ever before. In order to maintain the stability of secretarial functions in organizations, both the hardware and software have to be developed at the same time. In this study as an organization design tool, the concept of organization set, and role set have been incorporated.

불확실성 적응기법을 이용한 비선형 시스템의 강인 백스테핑 설계

김동헌(Dong-Hun Kim),김응석(Eung-Seok Kim),양해원(Hai-Won Yang) 제어로봇시스템학회 2001 제어·로봇·시스템학회 논문지 Vol.7 No.7

시판 차 음료 속에 함유된 불소의 농도 측정 및 연령별 불소섭취량 추정

한동헌 ( Dong Hun Han ),이운정 ( Un Jung Lee ),김동현 ( Dong Hyun Kim ),김민지 ( Min Ji Kim ),황수정 ( Su Jung Hwang ),김진범 ( Jin Bom Kim ) 대한예방치과·구강보건학회 2010 大韓口腔保健學會誌 Vol.34 No.3

Objectives. The purpose of this study was to analyze the fluoride concentrations of tea drinks which were commercially available in Korea in 2009 and to predict amount of daily fluoride intake from tea drink according to different age groups. Methods. The fluoride concentrations of 20 kinds of tea drinks were assessed by a fluoride ion selective electrode. The estimates of daily fluoride intake were assumed by Dietary Reference Intakes for Koreans 2005. Results. The fluoride concentrations of tea drinks were 0.03~1.72 ppm (mean 0.51 ppm). The calculated amount of daily fluoride intake which were supposed to drink all the sufficient water intake by tea drink of 1.72 ppm fluoride were over maximum intake of fluoride under 9 years olds and over sufficient intake of fluoride in all age groups. Those of 0.51 ppm fluoride were under maximum intake of fluoride in all age groups and over sufficient intake of fluoride under 5 months olds infants. Conclusions. Based on this study, most of the tea drink in Korea contained the appropriate concentration of fluoride. However, consuming some tea drink available in Korean market in large quantities may lead to exposion to a high amount of fluoride which may cause dental fluorosis in infants and young children. Although most of tea drinks are safer to consume, fluoride concentrations of some tea drinks are too low for caries prevention. In countries such as Korea where tea is traditionally consumed, the fluoride concentration and daily safety precautions should be indicated on tea products.

슬라이딩모드 관측기를 이용한 비선형시스템 제어기 설계

김동헌(Dong-Hun Kim),현근호(Keun-Ho Hyun),양해원(Hai-Won Yang) 대한전기학회 2000 대한전기학회 학술대회 논문집 Vol.2000 No.7