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.

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.

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.

초음파 센서를 이용한 물체인식

李基聖,郭漢澤 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

A 3-D object image recognition and restoration using the ultrasound array sensor is presented. To obtain an image of the object, the planar arrangement of the ultrasound sensor is used. The acquired data are learned by the SCL(Simple Competitive Learning) Neural Network. Lab experiments were performed to show that the object can be recognized by using small number of the ultrasound sensor and moment method.

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.

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.

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.

Actinobacillus actinomycetemcomitans의 Lipopolysaccharide에 대한 단클론항체의 제작 및 특성

성진효,이영종,김동기,장기완 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.4

Actinobacillus actinomycetemcomitans(A.actinomyceremcomitans), a nonmotile, gram negative facultative anaerobic coccobacillus, is supposed to be an important etiological agent in localized juvenile periodontitis and associated with adult type periodontitis. Lipopolysaccharide(LPS) is one of the various virulent factors of A. actinomycetemcomitans and can directly or indirectly cause destruction of periodontal tissue. The purpose of this study was to produce and characterize the monoclonal antibody to LPS of A.actinomycetemcomitans. The results were as follows; 1. The LPS yield of A. actinomycetemcomitans was 0.7% based on dry cell weight. 2. The antibody titers of immuninzed serum with 5.2 × 10^(8) bacteria were 1:64,000 to whole cells and 1:8,000 to LPS. 3. From three times of cloning the antibody producing hybridomas using limitation dilution method, ten monoclones producing monoclonal antibody to LPS of A.actinomycetemcomitans were obtained. 4. Ten monoclonal antibodies to LPS of A. actinomycetemcomitans were not found to cross-react with LPS of Escherichia coli(E. coli). These results indicate that the monoclonal antibody to LPS of A. actinomycetemcomitans was specific for A. actinomycetemcomitans.

NAP 공정을 이용한 하수의 질소 및 인 제거에 관한 연구

이성기,송영일,김현중,진성기 조선대학교 환경연구소 2000 環境硏究 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 A1, 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-N 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.

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.