슬관절 등속성 운동시 각속도가 뇌졸중 편마비 환자의 슬관절 근력 및 보행 균형능력에 미치는 영향

차은주(Cha, Eun-Ju),오재근(Oh, Jae-Keun),윤진호(Yoon, Jin-Ho) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.3

The purpose of this study was to investigate the effects of different speed of knee isokinetic exercise on strength of knee muscle, balance and gait ability in the hemiplegic stroke patient. For this study, 15 patients with hemiplegia caused by strokes were participated voluntarily and they were divided into two group; the Low speed group(60°/sec), the High speed group (180°/sec). Isokinetic exercise was accomplished during 6 weeks (3 days/week). All tests were completed before exercise, 3-weeks later and 6-weeks later. The data was analyzed by using SPSS/PC ver. 18.0. For verifying the differences between groups and interaction, ANOVA with repeated measure was used. Significant level was p<.05. The main findings of this study were as follows; 1) 10m gait speed and Time Up and Go had significant differences according to measure time.(p=.005, p<.001). 2) There was significant difference according to time in single leg standing test with open eyes(p<.003). There were significant differences in balance test between directions(L/R and F/B) and only balance test (F/B) had significant differences between groups in 6 weeks after training. 3) There were significant differences according to time in paretic knee extensor(p=.002) and flexor(p=.009) muscle strength(60°/sec) and only paretic knee extensor muscle strength had significant differences between groups in 6 weeks after training(p=.035). 4) There were significant differences according to time in paretic knee extensor(p=.001) and flexor(p=.014) muscle strength(180°/sec). 5) There was no significant difference in knee extension/flexion strength ratio. As a result, isokinetic exercise on the affected knee joint can improve strength of lower extremities, balance and gait ability in hemiplegia. It was more effective in low speed exercise than high speed exercise.

적외선검출기 READOUT CONTROLLER 개발

조승현,진호,남욱원,차상목,이성호,육인수,박영식,박수종,한원용,김성수,Cho, Seoung-Hyun,Jin, Ho,Nam, Uk-Won,Cha, Sang-Mok,Lee, Sung-Ho,Yuk, In-Soo,Park, Young-Sik,Pak, Soo-Jong,Han, Won-Yong,Kim, Sung-Soo 한국천문학회 2006 天文學論叢 Vol.21 No.2

We have developed a control electronics system for an infrared detector array of KASINICS (KASI Near Infrared Camera System), which is a new ground-based instrument of the Korea Astronomy and Space science Institute (KASI). Equipped with a $512{\times}512$ InSb array (ALADDIN III Quadrant, manufactured by Raytheon) sensitive from 1 to $5{\mu}m$, KASINICS will be used at J, H, Ks, and L-bands. The controller consists of DSP(Digital Signal Processor), Bias, Clock, and Video boards which are installed on a single VME-bus backplane. TMS320C6713DSP, FPGA(Field Programmable Gate Array), and 384-MB SDRAM(Synchronous Dynamic Random Access Memory) are included in the DSP board. DSP board manages entire electronics system, generates digital clock patterns and communicates with a PC using USB 2.0 interface. The clock patterns are downloaded from a PC and stored on the FPGA. UART is used for the communication with peripherals. Video board has 4 channel ADC which converts video signal into 16-bit digital numbers. Two video boards are installed on the controller for ALADDIN array. The Bias board provides 16 dc bias voltages and the Clock board has 15 clock channels. We have also coded a DSP firmware and a test version of control software in C-language. The controller is flexible enough to operate a wide range of IR array and CCD. Operational tests of the controller have been successfully finished using a test ROIC (Read-Out Integrated Circuit).

Disciplinary Special Physical Education : 독일의 장애인 스포츠 지도자 양성의 구조와 발달상황

한민규,차진호 ( Min Kyu Han,Jin Ho Cha ) 한국체육학회 1996 국제스포츠과학 학술대회 Vol.1996 No.2

KASINICS 오프닝 광학계의 부품 가공 및 정렬

목승원,이성호,육인수,박영식,진호,한정열,문봉곤,차상목,김건희,임명신,Mok, Seung-Won,Lee, Sung-Ho,Yuk, In-Soo,Park, Young-Sik,Jin, Ho,Han, Jeong-Yeo,Moon, Bong-Kon,Cha, Sang-Mok,Kim, Geon-Hee,Im, Myung-Shin 한국천문학회 2006 天文學論叢 Vol.21 No.2

The KASINICS (KASI Near Infrared Camera System) is a ground-based Near-Infrared (NIR) imaging instrument developed by the Korea Astronomy and Space Science Institute (KASI). In this paper, we report the test results of the KASINICS camera optics system which is comprised of a 1-1 Offner relay. We measure that the surface RMS fluctuations of the Offner mirrors are at the level of $10^{-1}-10^{-2}$ of the target wavelengths, showing that the mirrors are sufficiently smooth for NIR observations. The alignment of the Offner optics system has been checked too. Our ray-tracing simulations find that the image quality should not degrade more than the pixel size of the KASINICS ($40{\mu}m$), if a de-centering or a tilt of the Offner mirrors are within 5mm, or $2.5^{\circ}$. Our measurement shows that the de-centering or the tilt of the Offner mirrors are less than 1 mm or $0.5^{\circ}$, assuring that the KASINICS image quality are not affected by the alignment errors. We have also measured that the optics resolution is $20{\mu}m$ and it does not degrade more than 10% over the detector surface area of 14.3 mm ${/times}$ 14.3mm. Overall, we conclude that the KASINICS optics system satisfies the design requirements for NIR imaging observations.

데이터마이닝에서 교사학습에 의한 속성 가중치 최적화

강명구(Myung-Ku Kang),차진호(Jin-Ho Cha),김명원(Myungwon Kim) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1B

최근 군집화와 분류기법이 데이터 마이닝에 중요한 도구로 많은 응용분야에 사용되고 있다. 따라서 이러한 기법을 이용하는데 있어서 각각의 속성의 중요도가 달라 중요하지 않은 속성에 의해 중요한 속성이 왜곡되거나 때로는 마이닝의 결과를 잘못되는 결과를 얻을 수 있으며, 또한 전체 데이터를 사용할 경우 마이닝 과정을 저하시키는 문제로 속성 가중치과 속성선택에 관한 연구가 중요한 연구의 대상이 되고 있다. 최근 연구되고 있는 알고리즘들은 사용자의 의도와는 상관없이 데이터간의 관계에만 의존하여 가중치를 설정하므로 사용자가 마이닝 결과를 쉽게 이해하고 분석할 수 없는 문제점을 안고 있다. 본 논문에서는 클래스 정보가 있는 데이터뿐 아니라 클래스 정보가 없는 데이터를 분석할 경우 사용자의 의도에 따라 학습할 수 있도록 각 가중치를 부여하는 속성가중치 알고리즘을 제안한다. 또한 사용자가 의도한 정보를 이용하여 속성간의 가장 최적화 된 가중치를 찾아주면, Cramer's V²함수를 적합도 함수로 하는 유전자 알고리즘을 사용한다. 알고리즘의 타당성을 검증하기 위해 전자상거래상의 실험 데이터와 몇 가지 벤치마크 데이터를 이용하여 본 논문의 타당성을 보인다.

엔드밀 가공을 이용한 스페큘러 홀로그램 제작

전은채(Eun-chae Jeon),차진호(Jin-Ho Cha),이재령(Je-Ryung Lee),최환진(Hwan-Jin Choi),김창의(Chang-Eui Kim),제태진(Tae-Jin Je),김휘(Hwi Kim),최두선(Doo-Sun Choi) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.4

The specular hologram is one type of hologram, and it consists of many arcs. They are very easy to fabricate and can even be machined by hand had a compass. In this study, we designed two squares having different depths and consisting of many arcs, after which we machined the arcs using end-mill technology. The width of the machined arcs showed high repeatability. Moving tracks were observed on the bottom surface, and top burrs were noted. In spite of them, the phenomenon of the specular hologram was observed when an observer and a light source stood on the same side. The two squares seemed to have different depths when they were observed from the left and right directions. In this study, it was verified that a specular hologram can be manufactured by end-mill technology.

초정밀 평삭가공과 마이크로 펀칭가공을 위한 하이브리드 가공장비 및 공정기술 개발

김한희(Han-Hee Kim),전은채(Eun-chae Jeon),차진호(Jin-Ho Cha),이재령(Je-Ryung Lee),김창의(Chang-Eui Kim),최환진(Hwan-Jin Choi),제태진(Tae-Jin Je),최두선(Doo-Sun Choi) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.6

Ultra-fine planing and micro punching are separately used for improving surface roughness and machining dot patterns, respectively, of metal molds. If these separate machining processes are applied for machining of identical molds, there could be an aligning mismatch between the machine tool and the mold. A hybrid machining system combining ultra-fine planing and micro punching was newly developed in this study in order to solve this mismatch; hybrid process technology was also developed for machining dot patterns on a mirror surface of a metal mold. The hybrid machining system has X, Y, and Z axes, and a cam axis for ultra-fine planing. The cam axis and attachable and removable solenoid actuators for micro punching can make large and small sizes of dot patterns, respectively. Ultra-fine planing was applied in the first place to improve the surface roughness of a metal mold; the measured surface roughness was about 20nm. Then, micro punching was applied to machine dot patterns on the same mold. It was possible to control the diameter of the dot patterns by changing the input voltage of the solenoid actuator. Before machining, severe inhomogeneous plastic deformation around the machined dot patterns was also removed by annealing heat treatment. Therefore, it was verified that metal molds with dots patterns for optical products can be machined using a hybrid machining system and the hybrid process technology developed in this study.

웹 컨텐츠 추천 시스템 설계 및 구현

김산성(San-Sung Kim),류정우(Joung-Woo Ryu),성지애(Ji-Ae Sung),차진호(Jin-Ho Cha),김명원(Myoung-Won Kim) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1B

디지털 컨텐츠 산업의 성장, 전자상거래의 활성화, 기업의 홈페이지 활용 증가 등으로 온 · 오프라인에서 컨텐츠의 수요가 증가하면서 컨텐츠를 관리하는 컨텐츠 관리 시스템 시장의 성장 잠재성이 높아가고 있다. 본 논문에서는 이러한 컨텐츠 관리 시스템의 마지막 단계인 컨텐츠 배포 단계에 있어 모든 사용자에게 동일한 컨텐츠를 제공하는 것이 아니라 사용자의 관심에 따라 다른 컨텐츠를 동적으로 제공하는 컨텐츠 추천 시스템을 설계 및 구현한다. 본 시스템은 규칙 기반 추천 방식을 사용하고 있으며 규칙으로는 사용자간의 연관성을 나타내는 사용자 협업적 규칙과 항목간의 연관성을 나타내는 항목 협업적 규칙이 존재 한다. 또한 컨텐츠에 대한 사용자의 선호도를 측정하기 위해서 선호범위를 정의하고 있으며 취미, 관심분야와 같이 하나 이상의 값을 가질 수 있는 다중 값을 처리하고 있다. 시스템은 추천을 위한 정보 즉, 선호범위와 사용자 프로파일 그리고 규칙들을 생성하는 오프라인 작업과 이러한 정보를 이용하여 실시간으로 사용자에게 추천해주는 온라인 작업으로 나뉘어 진다.

EasyMiner : 데이터마이닝 시스템 설계 및 구현

최재웅(Jae-Woong Choi),류정우(Joung-Woo Ryu),김종수(Jong-Su Kim),차진호(Jin-Ho Cha),손영경(Young-Kyung Son),도영아(Young-a Do),김산성(San-Sung Kim),이진숙(Jin-Suk Lee),김명원(Myung-Won Kim) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅱ

정보기술의 발전은 기업들로 하여금 많은 양의 데이터를 기업내부에 축적할 수 있도록 하였지만, 축적된 데이터로부터 기업의 경쟁력을 강화시킬 수 있는 정보를 얻을 수 있는가의 여부는 별개의 문제이다. 즉, 최근 기업들은 최선의 의사결정을 내리는데 필요한 정보 또는 지식을 축적된 데이터로부터 가공해 낼 수 있는가의 여부에 중요한 관심사를 가지고 있다. 데이터마이닝은 바로 이와 같은 요구사항을 충족시키는 새로운 정보기술의 활용방법이다. 본 논문에서는 사용자가 쉽게 데이터마이닝을 접할 수 있게 하기 위해서 데이터마이닝 솔루션인 EasyMiner를 설계하였다. EasyMiner는 데이터베이스에 독립적으로 접근하여, 제공되는 마이닝 기법을 수행할 수 있다. 제공되는 마이닝 기법으로는 분류, 군집화, 연관규칙 그리고 기초통계를 지원하고 있으며 또한 기법들에 의해 생성된 지식들을 사용자에게 쉽게 이해시키기 위해 각 기법의 결과에 대한 가시화를 설계하였다. 본 논문에서는 데이터마이닝 솔루션인 EasyMiner 설계 및 구현에 관하여 제시한다.

독일의 장애인 스포츠 지도자 양성의 구조와 발달상황

한민규,차진호 한국특수체육학회 1996 한국특수체육학회지 Vol.4 No.1

The purpose of this study is to explain the structure, contents and state of development of the training for sports instructors for handicapped people in North-Rhine Westphalia and the Rhineland Palatinate. First of all, the historical point of view of German sports for handicapped people is explained, and then its organisation, structure, conceptions and definition are described. The course of the sports instructors for handicapped people is divided into three areas "head of specialized training for rehabilitation sport", "trainers" and "head of organization". The training for a specialized instructor in rehabilitation sport takes place in four phases. In this study, the contents of training instructor's course in internal organs at the third and the fourth phase are explained as a example. Its contents are composed of medical fundamentals, diagonostics, sports medicine, sports pedagogics, psychology, training exercises, organisation and law, dietetics and examination (total 190 lessons). Until 1994, the German Sports Association for Handicapped People educated The number of training instructors currently being trained is 795 (211 in a licence training course) (BAS, 1995). There are 245340 handicapped members (143368 men and 101972 women) and 2835 clubs (634 in North-Rhine Westphalia and 160 in the Rhineland Palatinate) (DBS, 1995).