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趙敏亨 수원대학교 산업기술연구소 1999 산업기술연구소논문집 Vol.14 No.-
In MRI system, the eddy current is one of the causes of image degradation and various solutions have been used to overcome its effect. In particular, the RC high-pass filter is widely used to compensate the eddy current effect of gradient waveforms because of its low cost. However, it has some drawbacks of analog circuits such as offset and instability. We propose a new full digital eddy current compensator. It is a kind of digital IIR filter, which can be implemented using software. IIR filter method can solve problems of analog circuits. We demonstrate the computer simulation results of IIR filters in this paper.
바디블레이드와 세라밴드를 이용한 운동이 대학생의 상지근력 악력 및 균형에 미치는 영향
조민형,김동호,김인하,이승희,김선교,김영주,최반석,이소영,조의진,김은정,최효정,임광묵,이유진,김경훈,Jo, Min-hyung,Kim, Dong-ho,Kim, In-ha,Lee, Seung-hee,Kim, Sun-kyo,Kim, Young-joo,Choi, Ban-seok,Lee, So-young,Cho, Eui-jin,Kim, Eun-jung,Choi, H 대한물리치료과학회 2019 대한물리치료과학회지 Vol.26 No.1
Purpose: The purpose of this study was to investigate the effects of body blade and Thera band exercise on upper extremity strength, grip strength and balance of university students. Design: Single Blind Randomized Controlled Trial. Method: twenty healthy adults, participated in this study, and were recruited by G University in Gimcheon Korea. The subjects were randomly divided into A group that went through Thera band exercise and B group that went through Body blade exercise. Each group had 10 subjects. All subjects did the experiment for 3 times a week for 3weeks. Spss was used for statistical analysis. Result: 1) Grip strength: After exercising, for the BE group, there were statistically significant differences in dominant and non-dominant hand. However, for the TE group, there were no significant statistical differences in both hands. 2) muscle strength: In the TE group there were no significant statistical differences in the dominant and non-dominant arm. But in the BE group there were differences which were found. 3) balance: After exercising, both groups had no significant statistical difference in medial lateral balance. In anterior and posterior balance, TE group had no statistical significant difference but BE group did. Conclusion: To improve muscle strength balance and grip strength, body blade exercise is more effective than Thera band exercise.
Dual Echo 영상의 동시 획득을 위한 새로운 Fast Spin Echo 자기 공명 영상법
조민형,이수열 대한의용생체공학회 1998 의공학회지 Vol.19 No.1
자기 공명 영상에서 최근에 개발된 fast spin echo 영상법은 종래에 사용되었던 spin echo 영상법과 거의 같은 화질과 contrast를 제공하면서도 8-16배 이상 촬영 시간이 단축되어 임상적으로 많이 사용되는 촬영 방법 중의 하나로 자리 잡았다. 그러나 종래의 spin echo영상법과는 달리, 동시에 spin밀도 영상과T 강조 영상을 제공하는 dual echo 영상법은 fast spin echo의 경우, 촬영 시간이 2배로 늘어나기 때문에 그 중요한 장점을 잃어 버리게 되었다. 본 논문에서는 dual echo를 동시에 얻기 위한 현재의 fast spin echo 영상법의 이와 같은 단점을 해결하는 새로운 영상법을 제안한다. 새로운 영상법은 기존의 fast spin echo와 거의 같은 화질을 제공하면서도 dual echo 영상을 얻는데 추가 촬영 시간을 요구하지 않는다. 이를 입증하기 위하여 인체 실험을 수행하였고 그 결과를 기존의 방법으로 얻은 영상과 비교함으로써 그 유용성을 보인다. In magnetic resonance imaging, the fast spin echo imaging technique is a widely used clinical imaging method. since its scanning time is much shorter than the conventional spin echo imaging and it gives the almost same image quality. However, the fast spin echo technique has two times longer imaging time for the dual echo acquisition which can obtain a spin density image and a T-give the same qulity images at the single echo imaging time. T he proposed technique reduces the imaging time by overlapping most of were obtained at the 0.3T permanent MRI system are presented.
TMS320C80을 이용한 Template Matching Algorithm의 구현
趙敏亨 수원대학교 산업기술연구소 1998 산업기술연구소논문집 Vol.13 No.-
For an advanced manufacturing system the automations of the assembly and inspection of products are necessary and an image recognition system is required. In this paper, the high performance vision system using parallel digital signal processor, TMS320C80 is presented and the related S/W algorithm is described. In particular, the widely-used template matching algorithm which required a big computing power was newly developed and its optimal codes were implemented. The developed algorithm shows the high computation efficiency for TMS320C80. It has some advantages that the template size is unlimited and the accurate correlation can be obtained.