기능특성을 고려한 생애주기 비용함수

이준구,김한중,윤성수,최원,이형진,김종옥,정남수,이정재,Lee, Joon-Gu,Kim, Han-Jung,Yoon, Seong-Su,Choi, Won,Lee, Hyung-Jin,Kim, Jong-Ok,Jung, Nam-Su,Lee, Jeong-Jae 한국농공학회 2008 한국농공학회논문집 Vol.50 No.6

An advanced model for assessing life cycle cost of the facility containing several subdivisions has been proposed with systems engineering approach. This model evaluates the maintenance cost in the sphere of the safety as well as in that of its functionality. The proposed approach has been shown to be more reasonable and practical than existing models. The serviceability and reasonability have been proved through evaluating life cycle cost of the reservoir which is a representative agricultural facility. In addition, the proposed method is helpful to make a maintenance strategy using the survival probability in the point of safety and functionality.

HPD 개발수명주기를 적용한 원전 FPGA 기반 제어기의 설계와 검증

이준구,정광일,박근옥,손광영,Lee, Joon-Ku,Jeong, Kwang-Il,Park, Geun-Ok,Sohn, Kwang-Young 한국전자통신학회 2014 한국전자통신학회 논문지 Vol.9 No.6

원자력 산업계는 최근 원전 계측제어계통 설비의 단종과 같은 예상치 못한 환경에 직면해오고 있으며, 이러한 문제를 근본적으로 해결하고자 노력하고 있다. IAEA, IEC, 등의 연구결과에 따르면, FPGA는 단종이 예상되는 제어계통에의 대체수단으로 주목받고 있다. FPGA가 원자력 플랜트의 PLC(Programmable Logic Controller)를 대체하기 위해서는 높은 건정성과 신뢰성을 가져야 한다. 따라서, FPGA 기반 제어기의 건전성과 신뢰성을 향상시키기 위하여 HDL 개발수명주기를 적용하여 개발하였다. 또한, 원전 계측제어계통에 적용하기 위하여 번인시험과 환경시험의 기기검증이 수행되었다. 시험수행결과, 352시간의 번인시험과 92시간의 환경시험 중에 정상적인 기능 및 성능을 수행함을 확인할 수 있었다. Nuclear industries have faced unfavorable circumstances such as an obsolescence of the instrumentation and control system, and therefore nuclear society is striving to resolve this issue fundamentally. IEC and IAEA judge that FPGA technology is a good replacement for Programmable Logic Controller (PLC) of Nuclear Instrumentation and Control System. FPGAs are currently highlighted as an alternative means for obsolete control systems. Because the main function inside an FPGA is initially developed as software, good software quality can impact the reliability of an FPGA-based controller. Therefore, it is necessary to establish a software development aspect strategy that enhances the reliability of an FPGA-based controller. In terms of software development, HDL-Programmed Device (HPD) Development Life Cycle is applied into FPGA-based Controller. The burn-in test and environmental(temperature) test should be performed in order to apply into nuclear instrumentation and control system. Therefore it is ensured that the developed FPGA-based controller are normally operated for 352 hours and 92 hours in test chamber of Korea Institute of Machinery and Materials (KIMM).

원전적용을 위한 FPGA 기반 제어기의 정량적 신뢰도 평가

이준구,정광일,박근옥,손광영,Lee, Joon-Ku,Jeong, Kwang-Il,Park, Geun-Ok,Sohn, Kwang-Young 한국전자통신학회 2014 한국전자통신학회 논문지 Vol.9 No.10

원자력 산업계는 최근 원전 계측제어계통 설비의 단종과 같은 예상치 못한 환경에 직면해오고 있으며, 이러한 문제를 근본적으로 해결하고자 노력하고 있다. IAEA, IEC, 등의 연구결과에 따르면, FPGA는 단종이 예상되는 제어계통에의 대체수단으로 주목받고 있다. 단종의 영향을 받지 않은 특성을 갖더라도 FPGA가 원자력 플랜트의 PLC (Programmable Logic Controller)를 대체하기 위해서는 높은 신뢰성을 가져야 한다. 따라서, FPGA 기반 제어기의 신뢰성을 향상시키기 위한 소프트웨어 개발 및 MTBF (Mean Time Between Failures)를 포함한 신뢰도분석이 MIL-HDBK-217F에 따라 수행되었다. MTBF는 FPGA 기반 제어기와 COMMON-Q PLC의 신뢰도인 MTBF가 비교분석된다. 신뢰도분석결과 FPGA 기반 제어기는 원전적용 PLC 동등이상의 신뢰성을 나타냄을 확인하였다. Nuclear industries have faced unfavorable circumstances such as an obsolescence of the instrumentation and control system, and therefore nuclear society is striving to resolve this trouble fundamentally. FPGAs are currently highlighted as an alternative means for obsolete control systems. Because of the obsolescence-unaffected characteristics, FPGA should be highly reliable in order to be a replacement for PLC (Programmable Logic Controller). Therefore, it is necessary to establish a software development aspect strategy that enhances the reliability of an FPGA-based controller. The reliability analysis including the MTBF (Mean Time Between Failures) is carried out based on the MIL-HDBK-217F. MTBFs are compared with the FPGA-based controller COMMON-Q PLC. As an analysis result, it shows that the reliability of the FPGA-based controller is better than or equal to that of PLC.

흉(胸).요추(腰椎) 압박골절(壓迫骨折) 환자(患者) 32례(例)에 대(對)한 임상적(臨床的) 고찰(考察)

이준구,이병렬,Lee Jun-Gu,Lee Byung-Ryul 대한침구의학회 1998 대한침구의학회지 Vol.15 No.2

Thirty two cases of patient with Thoracolumbar Compression Fracture were treated and observed clinically from November, 1997, to August, 1998, in the Dept. of Acupuncture and Moxibustion, Chon-an Oriental Medical Hospital, Taejon University. The results were obtained as follows; 1. The distribution of sex was male 6 cases(18.7%), female 26 cases(81.3%) and the distribution of age was seventies 17 cases(53.2%) the most. 2. The distribution of the causes was Slip-down 17 cases(53.2%) the most. 3. The distribution of the period before admission was within a week 19 cases(59.4%) the most. 4. The distribution of treatment duration in descending order: Under a week and two weeks under four weeks was the most number in 11 cases(59.4%) each. 5. The distribution of the injured level was L1 body 15 cases(18.3%) the most. 6. In the distribution of grading clinical severity on admission, the most cases were Gr.IV(18cases, 56.3%). 7. In the distribution of clinical symptoms on admission, 30 patients(21.9%) complained lower back pain and disturbance in turning over. 8. In the distribution of treatment result, the most cases(18 cases, 56.3%) was good. 9. The distribution of treatment duration according to the clinical grade on admission was as follows: Two weeks under four weeks was the most number in 8 cases(25%) in the group of Gr.IV, under two weeks was the most number in 6 cases(18.7%) in the group of Gr.III, and under four weeks was the most number in 2 cases(6.2%) in the group of Gr.II. 10. The distribution of treatment result according to the clinical grade on admission was as follows: Good was the most number in 10 cases(31.2%) in the group of Gr.IV, 6 cases(10.7%) in the group of Gr.III and 2 cases(6.2%) in the group of Gr.II. 11. The distribution of treatment result according to the treatment duration was as follows: Good was the most number in 4 cases(12.5%) under two weeks, 6cases(18.7%) two weeks under four weeks, and 6 cases(18.7%) four weeks under six weeks.

논문 - 수리시설물의 적정개보수 주기 및 비용 산정

이준구,김명원,신태호,Lee, Joon-Gu,Kim, Myong-Won,Shin, Tae-Ho 한국관개배수위원회 2011 한국관개배수논문집 Vol.18 No.2

This study was performed to apply the preventive management technique that is known for more economic and preventive for disaster than corrective technique to Repair & Improvement(R&I) Project policy of irrigational facilities. The appropriate periods of R&I Project had been driven to 40yrs, 24yrs, 27yrs, and 29yrs for reservoir, Pumping and drainage pumping station, Diversion weir and Irrigation & drainage canal respectively. The cost of R&I Project for 10 years had been estimated as 616.9 billion won per year including the 85 billion won for the project of 'Disaster prevention and Function continuity'. After the period of 'Improvement all at once', about 30yrs, 421.8 billion won was requested for 'Function continuity'.

질내 탈감작법으로 치유된 정액 아나필락시스 1 례

이준구,고시환,송정식,황재하,백용한,장윤수,김대중,배상욱,박중원,홍천수 ( Jun Gu Lee,Shi Hwan Ko,Jung Sik Song,Jae Ha Hwang,Yong Han Park,Yoon Soo Jang,Dae Jung Kim,Sang Wook Bae,Jung Woon Park,Chein Soo Hong ) 대한천식알레르기학회 1998 천식 및 알레르기 Vol.18 No.3

Human seminal fiuid (HSP) hypersensitivity is rare, but possibly a life-threatening disease. The pathogenesis of seminal plasma hypersensitivity and the exact nature of the HSP allergens remains to be clarified. We report a case of 25-year-old female patient who complained of severe itching sensation, flushing and edema of external genitalia, facial edema and dyspnea after sexual intercourse. The diagnosis was established by skin pr ick test with her husbands diluted semen. Intravaginal desensitization was performed by modified Matloffs method. Dilutions was made with sterile human serum albumin(0.2%) and 0.4% pheno1-0.9% saline solution. Two ml each of progressively greater concentrations of semen dilutions(1: 100,000 v/v, 1: 10,000 v/ v, 1:1,000 v/v, 1:100 v/v, 1:10 v/v) were inserted intravaginally at 45-min intervals, followed by an undiluted specimen. The patient was successfully desensitized and could have unprotected intercourse without anaphylaxis.

의료영상을 이용한 인체장기의 분할 및 시각화

이준구,김양모,김도연,Lee, Joon-Ku,Kim, Yang-Mo,Kim, Do-Yeon 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.1

방사선과 의사들은 CT 및 MRI 스캐너로부터 얻어진 인체의 단면 영상을 연속적으로 보고 실제 3차원적으로 인체가 어떻게 구성되어 있는지를 상상하여 병변을 구별하는데, 의학영상을 이용한 인체 장기의 3차원 시각화는 2차원 형태의 인체 단면 영상들을 복잡한 알고리즘이나 고성능의 컴퓨팅 파워를 사용하여 실제 인체와 같이 3차원으로 재구성하여 보여준다. 단면 영상의 추적, 관심영역의 표시 및 추출등과 같은 2차원 영상분석은 시간이 많이 소모되고, 주관적일 수가 있으며, 수작업인 관계로 빈번한 에러가 발생하는 단점을 가지는데, 이와 같은 2차원 의료 영상 분석의 단점을 보완하기 위해 의학영상처리 기술과 접목한 3차원 의료 영상의 시각화는 필수적이라 할 수 있다. 명암값 임계치 방법, 영역확장(region growing) 방법, 윤곽선(contour) 추출 방법 및 변형모델(deformable model) 방법을 사용하여 인체의 각 장기를 분리하였으며, 텍스쳐분석(texture analysis)을 통하여 고안된 특징자를 이용하여 암 부분을 인식하는데 사용하였고, 원근투영(perspective projection) 및 볼륨 데이터의 표면을 렌더링하기 위해 마칭큐브(marching cube) 알고리즘을 사용하였다. 인체 및 분리된 장기에 대한 3차원 시각화는 방사선치료계획(radiation treatment planning), 외과 수술계획, 모의수술, 중재적(interventional)시술 및 영상유도수술(image guided surgery)에 효과적으로 사용될 수 있다. Conventional CT and MRI scans produce cross-section slices of body that are viewed sequentially by radiologists who must imagine or extrapolate from these views what the 3 dimensional anatomy should be. By using sophisticated algorithm and high performance computing, these cross-sections may be rendered as direct 3D representations of human anatomy. The 2D medical image analysis forced to use time-consuming, subjective, error-prone manual techniques, such as slice tracing and region painting, for extracting regions of interest. To overcome the drawbacks of 2D medical image analysis, combining with medical image processing, 3D visualization is essential for extracting anatomical structures and making measurements. We used the gray-level thresholding, region growing, contour following, deformable model to segment human organ and used the feature vectors from texture analysis to detect harmful cancer. We used the perspective projection and marching cube algorithm to render the surface from volumetric MR and CT image data. The 3D visualization of human anatomy and segmented human organ provides valuable benefits for radiation treatment planning, surgical planning, surgery simulation, image guided surgery and interventional imaging applications.

ZigBee 이용 다자간 명함 교환을 위한 효율적 스케줄링 기법

이준구,임명섭,Lee, Jun-Gu,Lim, Myoung-Seob 한국융합신호처리학회 2008 융합신호처리학회 논문지 (JISPS) Vol.9 No.2

근거리 소출력 무선통신이 가능한 ZigBee 기술을 이용하여 다자간 자동 명함 교환 시스템을 구성하였다. 모든 노드가 서로 교대로 정보를 교환하는 full mesh network의 특성을 갖는 다자간 자동 명함 교환 시스템에서 정보교환에 소요되는 시간을 줄이는 것이 필요하다. 본 논문에서는 먼저 CSMA/CA 방식으로 주고받아 저장된 노드들의 주소 정보를 방송 후 각 노드들은 FIFO에 기반한 노드 순서에 따라 명함정보를 순차적으로 다른 노드들에게 방송한 방법을 제안하였다. 제안한 방식의 소모 시간을 분석하고 CSMA/CA 방식으로 직접 정보를 주고받는 방식과 비교하여, 노드 수와 정보량이 증가함에 따라 제안한 방식의 시간 소모가 직접 정보를 주고받는 방식보다 적음을 알 수 있었다. Autonomous business card exchange system using ZigBee with low power and short range was configured In the autonomous business card exchange system characterized as full mesh network in which every node exchanges each information one by one, it is necessary to reduce the time taken for information to be exchanged. In this paper, the novel method where the node ID is exchanged based on CSMA/CA and then the information of each node is broadcast to other nodes according to the ID list based on FIFO. The time required for exchanging information using the proposed method was analyzed and compared with the direct exchange method based on CSMA/CA. The results show that it takes less time in the proposed method than the direct exchange time.

Path Tracking Controller Design for Surface Vessel Based on Sliding Mode Control Method with Switching Law

이준구,Lee, JunKu The Korea Institute of Military Science and Techno 2017 한국군사과학기술학회지 Vol.20 No.1

In this paper, the path tracking controller for a surface vessel based on the sliding mode control (SMC) with the switching law is proposed. In order to have no restriction on movement and improved tracking performance, the proposed control system is developed as follows: First, the kinematic and dynamic models in Cartesian coordinates are considered to solve the singularity problem at the origin. Second, the new multiple sliding surfaces are designed with the SMC and approach angle concept to solve the under-actuated property. Third, the switching control system is designed to improve tracking performance. To prove the stability of the proposed switching system under the arbitrary switching, the Lyapunov stability analysis method with the common Lyapunov function is used. Finally, the computer simulations are performed to demonstrate the performance, effectiveness and stability of the proposed tracking controller of a surface vessel.

(1) 국내유치 성공사례 : 한국파스퇴르연구소(IPK)

이준구,Lee, Jun-Gu 한국과학기술단체총연합회 2007 과학과 기술 Vol.40 No.6