뇌졸중 환자 집행 기능 향상을 위한 중재에 대한 체계적 고찰

고석범,김문영,오윤택 대한신경계작업치료학회 2015 재활치료과학 Vol.4 No.2

목적: 본 연구의 목적은 뇌졸중 환자의 집행 기능 향상을 위해 회복기 및 인지 과정에 따른 중재법을 알아보고, 이를 집행기능 장애의 사례별 특성에 따라 정리하여 임상현장의 작업치료사에게 시행방법과 근거를 제시하고자 하는 것이다. 연구방법: 주요검색 용어‘Stroke’, ‘Executive function’, ‘Executive function deficit’, ‘Occupational therapy’, ‘Rehabilitation’, ‘Remedial’, ‘Compensatory’ and ‘Education’를 사용하여 1996년부터 2015년 4월까지 20년 간의 문헌을 검색하였다. 전자 테이터 베이스인 MEDLINE, SCOPUS, RISS을 사용하였으며 최종적으로 13개의 논문이 본 연구의 분석 대상으로 사용되었다. 결과: 선정된 13편의 연구는 질적 수준(level of evidence)에 따라 전체 연구 중 수준 에 포함하는 무작위 할당 실험 설계는 6개(46.2%)이었고, 수준 가 1개(7.7%), 수준 이 2개(15.4%), 수준 가 4개(30.8%)이었다. 각 중재 방법 에 따른 결과로 실행 기능의 향상을 보이나 일상생활의 일반화는 각 실험에 따라 차이가 있었다. 결론: 뇌졸중 환자의 집행 기능 향상을 위해 다양한 중재 방법이 적용되고 있으며, 중재 방법에 따라 효과의 차이가 나타났다. 본 연구는 뇌졸중 환자의 집행 기능 향상을 위한 중재 방법의 임상적 적용에 대한 근거를 제시하였다. 향후 연구에서는 다양한 중재 방법의 적용과 급성기 뇌졸중 환자에 대한 적용이 필요하다.

나프탈렌과 요오드사이에서 形成된 電荷移動錯物에 對한 溶媒 效果

高錫梵 全北大學校 師範大學 1977 사대논문집 Vol.3 No.-

The weak charge transfer complex between naphthalene and iodine has been investigated through ultraviolet-visible spectrophotometric measurements in the solvents n-hexane, carbon tetrachloride and chloroform, and through visible spectrophotometric measurements in carbon disulfide. Spectrophotometric data for the 1:1 complex in these solvents were measured at 25℃. The equilibrium constants for the formation of the complex and its molar absorption coefficient were calculated by Benesi-Hildebrand equation and Scott equation. The experimental results show that thermodynamic and spectrophotometric properties of the complex are different according the kind of solvents. The different values of thermodynamic and spectrophotometric properties of the complex in different solvents are suggested to be due to the solvation equilibrium among the reacting species(iodine, naphthalene and the complex) and solvents.

HiPi 버스를 갖는 캐쉬 기반형 멀티프로세서 시스템의 성능 평가

고석범,박경,황인석,강인곤,김영천 전북대학교 공업기술연구소 1991 工學硏究 Vol.22 No.-

Shared bus structure is usually used for a small-scaled multiprocessor system because of easy implementation and low cost But, overall performance of system is limited by bandwidth and transfer rate of the bus. Shortcomes of this structured multiprocessor system sre the shared bus bolttleneck and the increasement of the memory access time. these problems can be solved by using the multiple cache memory and the improvement of bus protocol. In this paper, multiprocessor system using HiPi bus and multiple cache memory is considered and described to improve the performance of time shared bus structure. HiPi bus uses pended protocol to increase the bus capacity. Cache to cache transfer mode is proposed to enhance the performance of HiPi bus. The performance of multiprocessor system with HiPi bus and that of multiprocessor system with modified HiPI bus are analyzed and compared. An analytical model for this system is described by Markov state diagram to compute the probability of each state. And, the modeling and simulation are done using SLAM III simulation language. The number of processors, hit ratio and the probability of the read operation are used as the input parameters. The utilization of processors,. address/data bus, and memory are measured and evaluated.

유전자 알고리즘을 이용한 최적의 분산 데이터베이스 시스템 설계

고석범,윤성대,Ko, Suc-Bum,Youn, Sung-Dae 한국정보처리학회 2000 정보처리논문지 Vol.7 No.9

Recently, DDSs(Distributed Database Systems) have been implemented on V AN(V alue Added Network) as we know the amazing expansion of information network. DDS can yield significant cost and response time advantages over centralized systems for geographically distributed organizations. However, inappropriate design can result in high cost and poor response time to maintain the database at each site. In a DDS design, the main problem is how to select proper computer and how to allocate data fragment into a proper site. In this paper, we address DDS design problem of selecting the proper class of computers and the allocating data files on VAN. Also, the formulated model includes two objectives, the waited response time and the investment cost to include their relationship. Specially, the formulation of waited response time is based on M/M/1 queueing system to evaluate more precisely. GA(Genetic Algorithm), a kind of heuristic search method, is developed to search an optimal solution in the proposed design model and we show the simulation result to examine the algorithm performance. 최근에 정보네트워크 사용자의 급증에 따라 DDS(Distributed Database System)는 VAN(Value Added Network)상에서 구현되었다. DDS는 지역적으로 분산된 작업환경에서 중앙집중식 데이터베이스 구축보다 여러 측면에서 장점이 있으나 불합리한 설계는 컴퓨터 및 네트워크 자원의 비효율적 사용에 의한 비용의 증가와 데이터 유지를 위한 복잡도의 증가를 야기한다. DDS 설계시 각 사이트에서 적절한 컴퓨터를 선택하는 문제와 단편화된 데이터를 적절한 사이트에 할당하는 문제가 중요하다. VAN 상에서 컴퓨터 선택과 데이터 파일의 할당은 응답대기시간(waited response time)과 투자비용(investment cost)의 상관관계를 반드시 고려하여 결정되어야 하므로, 본 논문에서는 각 컴퓨터와 파일의 할당의 영향에 따라 두 목적함수의 상관관계를 고려한다. 특히, 응답대기 시간에 대한 보다 실제적인 평가를 위해 M/M/1 큐잉 시스템을 기초로 하여 설계한다. 제안된 설계모델은 경험적 탐색법 중의 하나인 유전자 알고리즘(Genetic Algorithm)의 적용을 통해 효율적인 해의 탐색을 시도하고 제안된 수학적 모델과 알고리즘의 성능 검토를 위해 모의실험 및 결과분석을 한다.

Tiron水溶液中 亞鉛(Ⅱ)의 Polarography

高錫梵,朴鎭夏 全北大學校 1973 論文集 Vol.15 No.-

Polarographic behaviors of zinc(Ⅱ) in the tiron aqueous solution were investigated. It was found that zinc (Ⅱ) ion produced well-defined polarographic wave and showed a reduction wave on E_(1/2)=-0.98V(vs. SCE) at the pH of 4.4. The slope of log i/(i_d-i)~E plot of this wave was found to be 32 mv, so the electrode reaction seemed to be reversible two-electron reduction. The value of i_d/√h_corr was constant and the mean temperature coefficient was 1.40%/℃, which indicated that the diffusion current was diffusion-controlled. With increasing pH value of the zinc-tiron solution, the half-wave potential and the wave height were constant respectively when the pH was less than 5.4. The half-wave potential shifted regularly to more negative side when the _pH was from 5.4 to 8, and then shifted to positive side when the pH was in excess of 8. The relation between the concentration of zinc(Ⅱ) and its diffusion current was satisfactorily linear in the range of 5.6×10^-2 mM to 2.3×10^-1 mM zinc solution. The effects of standing time and some foreign ions were also studied.

주파수 변화율을 이용한 제주 전력계통의 부하차단계획 연구

고석범,김세호 제주대학교 산업기술연구소 1999 尖端技術硏究所論文集 Vol.10 No.2

A sudden loss of generation. causing a mismatch between energy supplied and energy demanded, will result in a system frequency drop. If governor action cannot activate spinning reserve quickly enough to restore the system to its normal operating frequency, underfrequency load shedding(UFLS) serves a last-resort tool to prevent system from collapse. Most UFLS schemes use pre-specified step sizes based upon frequency measurements. This Paper presents UFLS scheme which uses both frequency and the rate of frequency decline. The proposed method sheds load when the rate of frequency decline is gloater than a pre-set value. Simulation results show that the proposed scheme has the ability of fast frequency recovery in Cheju Power System.

소르비탄,부틸 및 수크로스에스테르의 합성 및 성질에 관한 연구

고석범,김영자 全北大學校 科學敎育硏究所 1998 과학과 과학교육 논문지 Vol.23 No.-

A high of sorbitan oleate was achieved by employing the Dean-Stark Trap apparatus which removes water formed during the reaction between sorbitol and oleic acid. The hydrophile-lipophile balance (HUB) value of the product was measured to be 11.9, suggesting that it can be used as an O/W emulsifier and solubilizer. Unreacted butyl alcohol was easily separated and recovered since the boiling point difference between butyl alcohol and butyl oleate is relatively large. The Amberite CG-420 was an effective catalyst for the reaction. Transesterification between dried sucrose and methyl stearate was carried out in DMF. Benzene was continuously added during azeotropic distillation to remove methanol formed during the reaction, resulting in a high yield of sucrose stearate.

Futurebus +를 사용하는 멀티프로세서 시스템에서 MESI 프로토콜의 성능 분석 ( Performance Analysis of Mesi Protocol for a Futurebus + Bsed Multiprocessor )

고석범,박경,김성기,강인곤,김영천 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.7

HiPi 버스를 사용하는 멀티프로세서 시스템의 성능 평가에 관한 연구 ( A Study on the Performance Evaluation of Multiprocessor System Using HiPi Bus )

고석범,박경,정지훈,황인석,강인곤,최진규,김영천 대한전자공학회 1991 대한전자공학회 학술대회 Vol.1991 No.11

A Study on the Exclusive-OR-based Technology Mapping Method in FPGA

고석범 한국통신학회 2003 韓國通信學會論文誌 Vol.28 No.11A