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신재혁,류영선,강희준 울산대학교 1998 공학연구논문집 Vol.29 No.2
본 논문은 10㎛ 정밀도를 가진 수동형 3차원 좌표 측정기(Coordinate Measuring Machine, CMM)에 다음의 기능을 부가함으로써, 자동화하고자한다. 그것들은 디스풀레이 제어, 키보드나 조이스틱을 통한 Man-Machine Interface 기능 그리고 서보 모터 제어 등이다. 이와같은 기능을 부가하기위하여, 8031 원칩 마이크로프로세서 시스템을 설계 제작하였고, Yasukawa 모터를 이용한 서보 제어 시스템은 일반적인 PID 알고리즘과 최종점에서 부가적인 Impulse 제어를 수행함으로써, 본 시스템의 요구 조건인 위치 오차 10㎛이내의 정밀 제어가 가능토록하였다. This paper works toward the development of an Automatic Coordinate Measuring Machine(CMM) by adding to a manually driven CMM machine with measuring accuracy of 10㎛ the following functions. a display control, man-machine interface with a joystick and a keypad, and servo motor control. 8031 one chip microprocessor system is designed to control the above functions and A servo motor control system with Yasukawa servo motors allows to control a probe with 10㎛ accuracy by using conventional PID control algorithm and an additional impulse control algorithm.
Al 7075합금의 열간성형 및 반응고성형 공정에 따른 미세조직과 경도 특성
신평우,이상용,전재일 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-
Various precision forging processes were applied for Al 7075 alloy. Among the each forging parts produced by existing multi-stage forging, improved single-stage forging and thixoforging(new technology of a near-net shape manufacture), thixoforging was excellent at viewpoints of homogeneity and formability. Hardness values of each forging parts produced by single-stage forging and thixoforging process came close to existing multi-stage forging parts. Irregular grain boundary and particle for thixoforging process were homogenized by artificial aging treatment(T6) and the hardness value was increased considerably.
전태원,우재홍,신창호,이기봉,이광희,박익렬,박성태,강현주 서울대학교 체육연구소 2000 서울大學校 體育硏究所論集 Vol.21 No.1
The purpose of this study this study was to comparative analysis the V02max and HR through arm ergometer exercise, bicycle ergometer exercise, and treadmill exercise and to propose correct data of aerobic ability according to GXT. Subjects for study were 8 healthy male students. The process of the test were performed maximal GXT on arm ergometer exercise, bicycle ergometer exercise, and treadmill exercise and measured V02max, max heart rate and recovery time of 3 VO2 and heart rate respectively. The conclusions were supported by the findings of this study: 1.There were significant differences between test style and V02/kg/min(p<.05). 2.There were significant differences between test style and test stage at heart rate(p<.05) There were no effect of reciprocal action. Therefore, V02/kg/min should be on individual exercise prescription guiedlines for health promotion should be provided proper GXT which are arm ergometer exercise, bicycle ergometer exercise, and treadmill exercise.
핸드볼 페널티드로우 시 숙련자와 비숙련자 간의 시각적 변이 비교 분석
한재희,박영민,신선미,이준희,심윤식 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2
The purpose of this study is to analyze the visual variation of skilled and unskilled people, and to obtain data necessary for skill improvement of effective handball penalty throw. An eye tracker was used to collect eye movements, concentration points, directions, and paths during penalty throws. The results are as follows: 1) For skilled players, the place where they threw and the place where their eyes were focused matched. 2) There is no difference in the presence or absence of eye contact with the goalkeeper.
신재국,차인준 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5
Clinical trial has been extensively applied not only in drug development but for the academic researches in biomedical field. Since this is an experimental research in human subjects, the highest level of ethical and scientific requirements should be asked to the investigators and their processing. Therefore, it is not surprising that clinical trial in drug development is strictly controlled by the ethical committee(institutional review board, IRB) and governmental regulations. Good clinical practice(GCP) has been developed as a guideline to keep the ethical and scientific requirements of clinica??trial. Unreliable data obtained from non-scientific approach can not be used for the best application of drugs or medical devices in to patients, which is not ethical in terms of their unnecessary exposure in human subjects. The most ideal type of clinical trial includes prospective, randomized. controlled and double-blinded approach. This short review introduces some of the important concepts in clinical trial, especially in the design and preparation of protocol.
신재범,이상영,김재수,박성희,임준석 韓國海洋大學校 附設 海洋科學技術硏究所 1992 硏究論文集 Vol.1 No.1
In the active sonar development, the reverberation is one of the major factors to be overcome like the clutter in the rader development. Unfortunately real reverberation data in various cases cannot be achieved so easily as real clutter data can be and there is a trend to build a simulator before a complex sonar system is developed. In the sonar simulator, the synthesized reverberation signal is necessary. In this paper we propose an algorithm to simulate the reverberation for the moving active sonar to use it in a simulator, and show some simulated results.
신현철,김성준,성진석,전영중,이재흥 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3
Can molasses, the most widely used carbon source for the industrial fermentation of L-lysine, usually contains a high concentration of calcium ions which tend to cause scaling problem in the recovery process. To remove the calcium ions, cane molasses was pretreated with sulfuric acid by adjusting the pH to 2.5~3.5. When the pretreated solution was directly heat-sterilized and used in the fermentation, a significant reduction in L-lysine production was observed. In this paper, we proved that sucrose is a superior substrate for L-lysine fermentation of that of glucose or fructose and that the above-mentioned decrease of L-lysine production was caused by the hydrolysis of sucrose in the molasses when the molasses was heat-sterilized at a low pH. The problem was overcome by adjusting the pH of molasses to neutral before sterilization.