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실시간 주기억 장치 데이타베이스 시스템에서의 데이타 압축을 위한 관리자 설계
박기범(Gi-Bum Park),심종익(Jong-Ik Shim),이순조(Soon-Jo Lee),배해영(Hae-Young Bae) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.2A
실시간 주기억 장치 데이타베이스 시스템은 발생하는 실시간 트랜잭션의 시간 제약 조건을 준수하기 위하여 방해 요소가 되는 디스크 입출력을 제거할 수 있도록 전체 데이타베이스를 주기억 장치에 상주시키는 방법이다. 이러한 시스템에서는 알고리즘 선택시 주기억 장치 사용량과 CPU 사용 시간의 최소화 조건을 고려해야만 한다. 본 논문은 주기억 장치의 가용 공간을 최대화하기 위한 데이타 압축 관리 기법을 제안한다. 제안된 기법은 데이타를 실시간 데이타와 비실시간 데이타로 구분하여 유효 기간이 경과된 실시간 데이타와 참조 가능성이 적은 비 실시간 데이타에 대하여 시스템의 성능을 고려한 주기적인 압축과 비 주기적인 압축 기법을 설계 한다. 따라서 실시간 트랜잭션의 데드라인 위반응을 증가시키지 않으면서 주기억 장치의 가용 공간에 대한 물리적 한계를 최소화할 수 있도록 한다.
키네시오 테이핑 요법이 운동능력과 근피로도에 미치는 효과
박기범(Park Gi-bum),이원재(Lee Won-Jae),한승완(Han Seung-Wan) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.2
The study carried out a maximum exercise load test for measuring heart rate and blood lactic acid concentration with and without kinesio taping therapy and an electromyogram test for checking muscle fatigue on 14 college students in the physical education department for checking and comparing synchronized muscle function of leg flexor and extensor strengths. Accordingly, it concluded as follows: In the case of the change in heart rate, there was not any considerable difference by condition for both male and female, but the figure under the therapy application was high compared to the case of not. In the case of the change in blood lactic acid concentration, there wasn't any considerable difference by the conditioning period for both male and female, but the figure under the condition of taping application was low during exercise for both groups compared to prior to the exercise. As to the recovery ratio of blood lactic acid, no considerable difference in data was noticed for both male and female, but it was low under the therapy application during 20 minutes of recovery period compared to the case without it. For muscle fatigue (decrease of frequency) by electromyogram test, there was not any considerable difference in thigh quadriceps and biceps by the conditioning period for both male and female, but a decrease of frequency was small under the therapy application compared to the case of not. The decrease ratio of frequency without taping therapy was remarkably small compared to the case of the therapy application for male, and in the case of female, there wasn't any considerable difference, but the figure without the therapy application was low compared to that with taping therapy. In conclusion, the application of kinesio taping therapy during exercise drops the increase of blood lactic acid concentration but is considered not to have considerable effects on the recovery period after exercise. However, it is thought to be effective on recovery of muscle fatigue in sustained exercise according to an electromyogram test. conclusionly, kinesio taping therapy is regarded as an effective way to the condition the control of muscles used during the later part of exercise.
박기범(Park Ki Bum),이태훈(Lee Tae Hoon),이기천(Lee Gi Chun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper introduces a study of improvement for a defect diagnosis of the UM71C track circuit using on HSL. The track circuit on HSL has long operation section. Therefore, when the worker maintain, many times and efforts are spent. So, periodically, we have operated a inspection car. However, we don"t know exactly the state changed of the inspection data when track circuit has defect. Actually, We fixed a sample area within operation section on HSL and performed the simulations for short circuit current that is reflected characteristic impedance and propagation factor. We compared the measuring data with the result of the simulation. Using verified simulation program, we estimated inspection data as the malfunction number and the change of capacity of compensation capacitor. These study need to secure of the safety as the train operation. Also, It needs to make a criteria of analysis for the maintenance through comparison simulation data and inspection data.
박기범(Park, Ki-Bum),진기호(Jin, Gi-Ho),장세진(Jang, Se-Jin),하성룡(Ha, Sung-Ryong) 한국지적정보학회 2013 한국지적정보학회 학술발표대회 논문집 Vol.2013 No.6
최근 3차원 실내공간정보 구축을 위한 접근 방법이 다양하게 제시되고 있으나 그 중에서도 지상라이다를 통한 구축 방법이 주목받고 있는 상황이다. 그러나, 지상라이다에 의한 실내공간정보 구축 방법은 높은 측위정확성을 가지고 있음에도 불구하고 시간 및 비용이 많이 소요되며 복잡한 후처리작업이 필요하다는 한계도 아울러 가지고 있다. 본 연구에서는 지상라이다 활용방법 이외에 BIM(Building Information Modeling)을 위한 실내공간정보 구축의 초기단계로 건축설계도면을 지상라이다 성과 및 3차원 모델링 성과를 통해 추출된 2D 벡터자료와 각각 중첩, 기하학적 부합여부를 비교 분석하여 건축설계도면의 3차원 실내공간정보에 대한 활용적합성 여부를 제시하고자 한다.
이영호(Young-Ho Lee),박기범(Gi-Bum Park),조영태(Young-Tae Cho),이응석(Eung-Suk Lee),정윤교(Yoon-Gyo Jung) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.3
There are two types of expensive measuring instruments currently on the market shape measurement and roundness measurement instruments. As they are very expensive, from tens of millions to more than 200 million won, buying them is economically burdensome for small companies or individuals. Therefore, in order to integrate the shape and roundness measurements into a single transfer device, this study aimed to reduce the trial and error by 3D modeling and simulation, and we confirmed the feasibility of operation. Based on these outcomes, a prototype hybrid measuring instrument was fabricated. As a result of performance evaluation and comparative evaluation, we verified the feasibility of implementation and application of the hybrid measuring instrument.
전용주(Jeon Yong Joo),류영태(Ryu Young Tae),이태훈(Lee Tae Hoon),박기범(Park ki bum),이기천(Lee Gi Chun),김선구(Kim Sun goo) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The Operation of high speed train in year 2004 bring about a great change in railroad industry. Especially in railroad construction field we have acquired great Know-how. And up to now we are building up operation skills. But the high speed train system are totally imported, so it is necessary to investigate some of the equipment based on our own environment. In case of Toughened Glass Stem Insulator, we don"t have any application case in domestic and limited in abroad. So there must be some characteristic estimation. This paper introduces estimation methode in three different field. First electrical field, Second physical field and finally environment circumstance. In Electrical field, amplitude and number of time for abnormal peak voltage data are collected. And in physical field case, amplitude and trend of vibration in to the insulator are examined. And I circumstance case, possibility of flying gravel and ice clod are investigated. Through this basic data, suitability for Toughened Glass Stem Insulator using in domestic will be accumulated and estimated.
전철변전소 전력요금 계산 프로그램 및 피크전력 저감방안
전용주(Jeon Yong Joo),류영태(Ryu Young Tae),박기범(Park Ki bum),이태훈(Lee Tea Hoon),이기천(Lee Gi Chun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
KORAIL is one of the biggest consumer in electric power market so it is necessary to investigate power consumption pattern and optimize power rates. This paper presents simulation program for electric power rates define program based on billing system database. Base on the substation annual power usage DB data, the characteristic of the substation power consumption are investigated and effective electrical billing system are compared each other. Through this program it is verified that we can save more then several hundred million won for a year. Also electric train air condition power consumption was measured to figure the method how to reduce peak energy consumption.