한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.

자율 주행 로봇의 장애물 회피

李基聖 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

For the factory automations and flexible manufacturing systems, mobile robot systems are introduced. To be used in the real factory environments, the capability of the position sensing, collision avoidance and control technology using the sensors and navigation is needed. Navigation is a method to direct a mobile robot without collision when traversing known or unknown environments. In this paper, new algorithm for the path planning and collision avoidance is proposed. The genetic algorithm searches for a path in the entire and continuous free space and unifies global path planning and local path planning. The simulation result shows the proposed method is an efficient and effective method when compared with the traditional collision avoidance algorithms.

유전 알고리즘을 이용한 자율주행 운반체의 경로 보정

李基聖 弘益大學校 科學基術硏究所 1999 科學技術硏究論文集 Vol.10 No.2

In order to make an autonomous mobile robot, techniques of automatic position estimation, artificial intelligence control using sensor needed. Especially, automatic position estimation technique is essential. The autonomous mobile robot estimates the position using encoder readings. Generally, the conventional PI-controller with fixed parameters is used to compensate the error of mobile robot. To reduce the error between the desired trajectory and the measured trajectory, the parameters in PI is tamed using a genetic algorithm. A new method using a genetic algorithm to find optimal PI coefficients is proposed. The position and angle errors that resulted from unbalanced wheel-loads of a mobile robot with encoder from wheels are measured. And in oder to find optimal PI coefficients, the genetic algorithm whose fitness function is established to minimize errors is used.

혐기·호기공정을 이용한 생물막법에서 유기물, 질소 및 인제거에 관한 연구

이성기,송영일,김현중,진성기,김은영 조선대학교 환경연구소 2001 環境硏究 Vol.17 No.1

Anoxic and Oxic process with contact media is used to remove an organic matter, nitrogen and phosphorus in sewage which derives from domestic wastewater. Experiments have been done with various conditions that concentration of oxygen can be 3mg/ℓ, 4∼5mg/ℓ and 5∼6mg/ℓ by controlling an retention time can be 10hr, 12hr and 14hr, return rate can be 0%, 100% and 200%. As the concentration of oxygen is 2∼3mg/ℓ. The rate of removal of BOD. COD. SS. T-N and T-P is 87%, 76%, 82%, 34% and 24%. As the concentration of oxygen is 5∼6mg/ℓ. The rate of removal of BOD, COD, SS, T-N and T-P is 92%, 84%, 88%, 45% and 33%. In the rate of removal of an organism, nitrogen and phosphorus thus It well be known that the rate of removal an organic matter, nitrogen and phosphorus will be increased as the concentration of oxygen becomes higher. As th retention time is increased, the rate of removal of BOD, COD, SS, T-N and T-P is gradually higher in the rate of removal of an organic matter, nitrogen and phosphorus. Because contact time and contact area will be increased, which generates active substrate transfer and metabolic react according to increment of retention time. As the return rate is increased. The rate of removal of BOD, COD and SS is likely to be increased. In the case of T-N. It is also increased by 28% at 0% of the return rate and by 60% at 200% of the return rate. In the case of T-P, however, It is deceased, as the return rate is increased by 42% at 0% of the return rate and by 30% at 00% of the return. As the return rate is increased the retention time is decreased, which causes less activity of bacterial which affects that the rate of removal of Phosphorus is decreased.

GUI를 이용한 해안 지하수 관리 시스템의 전처리부 설계

이양민,주성용,고방원,이재기 東亞大學校附設情報技術硏究所 2005 情報技術硏究所論文誌 Vol.12 No.2

Recently, the deficit of water resource is going to become a serious issue in the world. In this situation, the continuous guarantee and the management of water resoruces is very important. In this paper, we have studied on the GUI design techniques for Seaside Underground Water Management System. Especially we bring to a focus about its preprocessor using GUI. We improved the efficiency of input task through mutual relations among various input factors that is used in Seaside Underground Water Management System by efficient interface design techniques.

다중경로를 갖는 헬리콥터 회전익 설계를 위한 진동 특성 연구

이기형,지창헌,정인성 全北大學校 1994 論文集 Vol.37 No.-

The bearingless rotorcraft offers reduced weight, less complexity and superior flying qualities. The bearingless rotors are presently being developed and it is most likely that the next generation rotorcraft would be equipped with these rotors. Almost all practical designs of bearingless rotors include multiple load paths. The flexure of a bearingless blade consists of multiple beams(flexbeads and torque tube) leading to redundancy. Numerical results are presented for several analytical models of the bearingless blade.

자율주행 운반체의 경로 계획

李基聖,신영국 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

In the path planning for a mobile robot, Distance Transform(DT), Certainty Grid Map and Artificial Intelligent algorithms are widely used. The above three algorithm have several drawbacks to generate the best path of all possible paths. In this paper new path planning algorithms are proposed. Three methods of path planning are Primitive Transform, Fast Primitive Distance Transform, Land Gambling Distance Transform. The simulation is performed to show that the proposed algorithms can generate the best path for a mobile robot.

NAP 공정을 이용한 하수의 질소 및 인 제거에 관한 연구

이성기,송영일,김현중,진성기 조선대학교 환경공해연구소 2000 環境公害硏究 Vol.16 No.1

In the process of NAP(Nightsoil Application Process)to get rid of organism, nitrogen and phosphorus, the retention time in an aerobic tank is set up 4hr, 5hr and 6hr with Al, A2 and A3 reactor the sludge return rate is 50% and the internal return rate is 200%. The change of DO, PH, MLSS, MLVSS, Alkalinity, SBOD, SCOD, Organism, SS, Nutrients and the removal rate of those conditions are followed as below. The removal rate of BOD in each reactor is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The average removal rate of COD is 82.3% in A1, 83.6% in A2 and 88.0% in A3. The average removal rate of SS is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The results show that A3 reactor, which has longer retention time than others in the aerobic tank has better removal rate of organism and SS. The average removal rate of T-N in each reactor is 51.4% in A1, 51.8% in A2 and 60.3% in A3. The average removal rate of T-P is 43.4% in A1, 46.0% in A2 and 52.78% in A3. It indicates that the removal rate is higher when the retention time in the aerobic tank is increased. NAP process can be operated that inserting nightsoil which causes to increase C/N in a reactor affects microorganism activity and increases the removal rate of nutrients in the spite of the decrease of the retention time. If the reactor conditions which are internal return rate, return sludge rate and volume of inserting nightsoil are set up properly, The removal rate can be higher in NAP process than in DNR process in which nightsoil is not inserted.

급성 심근경색후 생존심근 진단에서 Dobutamine 심초음파도와 Thallium 심근스캔의 정확성 비교

이근,강덕현,송재관,이철환,최기준,홍명기,김재중,박성욱,박종훈,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.2

지하수 자원 개발 시뮬레이터를 위한 GUI 전후처리부 개발

이양민,최성준,이재기 동아대학교 공과대학부설 정보통신연구소 2007 情報技術硏究所論文誌 Vol.15 No.1

본 논문에서는 해안 지하수 개발 시뮬레이터인 SIOP의 전후 처리 부 설계와 구현을 수행 하였다. 시뮬레이터 의 사용에 있어 입출력의 난해함이 시뮬레이터 생산성을 감소시키기 때문에 이를 해결하기 위한 GUI 기반의 전후 처리 부를 수치처리 시뮬레이터인 SIOP에 연동 시켰다. SIOP은 3개의 입력 파일을 필요로 하며,각 파일마다 복잡한 수치정보를 입력해야 하는데 보다 직관적인 인터페이스를 통하여 입력할 수 있도록 하였고, 자동 입력이 가능한 부분을 증가 시켜 입력 파일의 생성 시간을 감소시켰다. 또한 수치지도를 로드 할 수 있는 기능을 포함하여 수치지도 상에서 대화형으로 입력 작업을 수행 할 수 있도록 하였다. 전후 처리 부는 SIOP의 시뮬레이션 결과 파일을 텍스트 형태의 출력에서 시각적인 출력으로 재 처리 하는 프로그램이다. 그래픽 컴포넌트를 활용 하여 4개의 Plot과 최적산출량의 표시가 가능 하도록 구현하였다. 프로그램 구조는 재사용과 수정이 용이하도록 독립적인 객체를 적용하였다. 본 논문에서 구현한 GUI의 전후 처리 부를 통하여 시뮬레이션 수행을 위한 사전 작업과 결과 해석 작업의 시간을 대폭 감소 시켜 향후 사용자들이 보다 편리하게 시뮬레이터를 사용하는 것이 가능하다. 따라서 SIOP 시뮬레이터는 해안지하수 확보를 위한 다양한 실험에 쉽게 활용될 수 있을 것이다. 향후 과제로는 전후 처리부의 기능 추가 및 최적화 작업이 있다. Research is progressing in several fields to secure insufficient water resoruces in the future. Approach method for deverlopment of water resource and studies area are defference, but research method is simulation in various research field Good points of Simulation can get various result of studies and be reduce genesis of dangers and expense. In this paper, we notice Input/output method in simulator that is used by research means of development of water resources are complicated and use activation is low, so we develop GUI based user convenience centric Simulator. In this paper, we develop mouse input centric preprocessor for SIOP which is seashore underground water management simulaotr and increase Simulation productivity and convenience by develop postprocessor which is visual process to result.