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DRM의 기술.시장 동향- DRM 기반 유비쿼터스 콘텐츠 서비스 시대 도래
유세근,Yu, Se-Geun 한국데이터베이스진흥원 2004 디지털콘텐츠 Vol.12 No.-
유무선 경계가 사라지고 유비쿼터스 시대로 다가서면서 DRM(Digital Right Management)에 대한 관심이 고조되고 있으며, 디지털 음악을 비롯한 게임, 동영상 등의 여러 분야에서 그 필요성을 인정받고 있다. DRM에 대한 기술적 배경과 동향, 적용사례 등에 대해 살펴본다.
신경자극기 형태에 따른 자극 Artifact 제거 방법에 대한 연구
유세근,민병관 대한의용생체공학회 1993 의공학회지 Vol.14 No.3
The conduction velocity of the nerve is of importance to the diagnosis of various negromuscular disorders. A major technical problem encountered in nerve stimulation technique is the control of stimulus artifact and the convenience of nerve stimulator. The remained artifacts must be removed by processing the contaminated signal. This paper discusses about the artifact cancellation algorithms in constant voltage type nerve stimulator(CVS) and constant current type nerve stimulator(CCS).
Carbachol에 의한 닭 췌조직내 nitric oxide synthase 활성 및 methylated arginine 함량변화
유세근,남석우,박승희,남태균,서동완,한정환,홍성렬,이향우 성균관대학교 약학연구소 1994 成均藥硏論文集 Vol.6 No.1
The role of nitric oxide (NO) in the regulation of exocrine secretion was investigated in chicken pancreatic tissues. Nitric oxide synthase (NOS) in the pancreatic tissues were Ca^2+-dependent form. Treatment of tissue with L-arginine (10 mM) or carbachol (10^-5 M) showed the increase of pancreatic exocrine secretion, but that of D-arginine (10 mM) did not. ^3H-citrulline formation, cyclic GMP level and methyl arginine contents in the homogenates of pancreatic tissues treated with carbachol were not affected. Although the action mechanism of NO in the pancreatic tissues remains unknown, NO apparently participates significantly in the overall control of pancreatic secretory function.
독립성분 분석과 신전달 모델을 이용한 근육의 미세한 힘의 추정에 관한 연구
兪世根(Sae-Keun Yoo),廉斗昊(Doo-Ho Youm),李灝龍(Ho-Yong Lee),金成煥(Sung-Hwan Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.3
The low force estimation method of skeletal muscle was proposed by using ICA(independent component analysis) and neuro-transmission model. An EMG decomposition is the procedure by which the signal is classified into its constituent MUAP(motor unit action potential). The force index of electromyography was due to the generation of MUAP. To estimate low force, current analysis technique, such as RMS(root mean square) and MAV(mean absolute value), have not been shown to provide direct measures of the number and timing of motoneurons firing or their firing frequencies, but are used due to lack of other options. In this paper, the method based on ICA and chemical signal transmission mechanism from neuron to muscle was proposed. The force generation model consists of two linear, first-order low pass filters separated by a static non-linearity. The model takes a modulated IPI(inter pulse interval) as input and produces isometric force as output. Both the step and random train were applied to the neuro-transmission model. As a results, the ICA has shown remarkable enhancement by finding a hidden MUAP from the original superimposed EMG signal and estimating accurate IPI. And the proposed estimation technique shows good agreements with the low force measured comparing with RMS and MAV method to the input patterns.
다중 차선에서의 차량 우선 처리를 위한 동적 중재 알고리즘
장명덕,유세근,김용득,Jang, Myung-Deok,Yoo, Se-Keun,Kim, Yong-Deak 대한전자공학회 1999 電子工學會論文誌, S Vol.s36 No.7
본 논문에서는 교통 정보의 수집, 처리를 위하여 다중 차선 상의 차량 및 노측 제어기간 무선 통신에 사용되는 차량 중재 방법들의 실시간 교통량 변화에 따른 통신 신뢰도를 분석하고 이에 따른 최적 파라미터를 추출하여 적용하는 동적 중재 알고리즘을 제안하였다. 랜덤 지연 계수법 및 퍼시스트 기법에 의한 중재 방법을 분석의 대상으로 하여 컴퓨터 시뮬레이션에 의해 제안된 알고리즘을 평가한 결과 정적인 방법에 비해 향상된 신뢰도를 얻을 수 있었다. 이 알고리즘은 트랜스폰더와 제어기간의 통신으로 이루어지는 여러 시스템에 응용 가능하다. This paper deals with the dynamic vehicle arbitration algorithm for communication between vehicles and a roadside control init on multilane environment. The suggested algorithm varies its parameter values according to the current vehicle arrival rate to get the maximum performance. To get the optimum parameter values, arbitration methods that use random delay counter and persist mechanism were taken into account and the performance of these methods with respect to the vehicle arrival rate was analyzed by computer simulation. After applying the optimum parameter values to suggested algorithm, it is shown that more enhanced reliability was acquired This algorithm could be applied to various systems which include the communication between a transponder and a control unit.
당뇨병 유발쥐혈청내 methylated amino acid의 함량 변화
김용기,유세근,남석우,이향우 성균관대학교 약학연구소 1993 成均藥硏論文集 Vol.5 No.1
In order to investigate the relationship between methylated amino acids and diabetes, we investigated the changes of serum concentration of methylated amino acids in serum of the experimentally induced diabetic rats. The diabetic symptom was induced by injectly alloxan 100 mg/kg intraperitoneally. The serum content of N^G-monomethylarginine(MMA), N^G, N^G-dimethyl-arginine(DMA) and N^G, N^G-dimethylarginine(D'MA) were analyzed by HPLC. The results are as followings ① There was no change in serum content of MMA in the diabetic group. ② But it was observed that the amounts of DMA and D'MA were increased remarkably in the diabetic group. Specifically, D'MA content was increased about 7 times in comparision to that of the control group. ③ However, the concentration of trimethyllysine in RBC was decreased slightly in diabetic group but not significant statistically.