시공간 트렐리스 부호화 CDMA 시스템에서의 선택적 PRC를 사용한 레이크 수신기의 성능 분석

기영민,임은정,안철용,김동구,이석규 延世大學校 電波通信共同硏究所 2002 電波通信論文誌 Vol.6 No.1

다중 경로 페이딩 채널에서의 시공간 트렐리스 부호 (STTC, Space-Time Trellis Codes)의 성능 열화를 보완하기 위한 시공간 등화기는 수신기를 복잡하게 하는 단점이 있다. 본 논문에서는 PRC (Principal Ratio Combining) 레이크 수신기를 제안하였다. 이 수신기는 다중 경로 신호를 PRC 기법을 사용하여 컴바이닝 함으로서 수신 SINR (Signal to Interference and Noise Ratio)을 개선하는 효과를 얻는다. 또한, 본 논문에서는 모든 다중 경로 컴바이닝에 비교하여, 낮은 복잡도로 비슷한 성능을 얻을 수 있는 선택적 PRC (Hybrid Selection / Principal Ratio Combining) 구조를 제시하였다. The space-time equalizer has been used to enhance the space time code in the multipath fading channel. However it requires higher receive complexity. In this paper, the principal ratio combining (PRC) receiver for space-time trellis coded CDMA system is proposed in the multipath fading channels. It maximizes the received signal to interference and noise ratio (SINR) and reduces the complexity of the system compared to optimum ML receiver. We also present the hybrid selection / principal ratio combining (HS/PRC) scheme that can achieve the performance comparable to that of the full path PRC combining system.

대퇴박근 근피판을 이용한 Fournier's gangrene치험례

이석기,이종원,이형주,임풍 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.1

Fournier's gangrene is a progressive tissue necrosis of scrotum, this disease commonly occured in alcoholics and diabetic patients. 60 year old patient shows toxic symptom and even sepsis, but the scrotal content is to be spared. The treatment of this disease is adequate debridement and administration of sensitive antibiotics. If the scrotal content is exposed, the defect can be covered with skin graft, local flap, etc. But, when the scrotum shows marked fibrosis or inflammation, myocutaneous flap is inevitable. We experienced one case of scrotal defect due to Fournier's gangrene, which was successfully covered with gracilis myocutaneous flap.

CCV를 이용한 동화상 검색시스탬 설계 및 구현

정기봉,오태석,오무송 조선대학교 생산기술연구소 1998 生産技術硏究 Vol.20 No.2

급진전하는 현대사회는 멀티미디어 기술의 비약적인 발전으로 사용자는 다양하고 방대한 양의 영상 정보를 접할 수 있게 되었다. 영상데이터 베이스 시스템은 많은 영상들로 이루어져 있기 때문에 사용자가 원하는 영상을 찾는데 어려움이 따른다. 이로 인해 효과적인 검색방법이 요구되어 지고 있다. 본 논문에서는 이러한 방대한 양을 가지고 있는 영상데이터를 검색하기 위해 새로운 검색 방법을 제시한다. 제안하는 검색방법은 검색을 원하는 정지영상 이미지 데이터의 컬러이미지 또는 시각적인 모델을 제시하면 시스템이 이를 자동으로 분석하여 이미지 데이터베이스 에 저장된 유사한 이미지 데이터들과 관련된 정보들을 질의결과로 나타내어 쉽게 검색하고자 한다.

스피드 트레이닝 방법에 따른 Creatime Kinase의 변화가 30M 전력달리기 기록에 미치는 영향

金基榮,田寬錫,曺圭權,鄭宇鎭 江原大學校附設體育科學硏究所 1994 江原大學校附設體育科學硏究所論文集 Vol.- No.18

The enhancement of sport performance is made possible by scientific training methods which can back up all area osf sports. The subjects of this study were 16 students of Department of P. E., Kangnung National University, They were divided into 4 groups (4 students in each group) - Control Group, Box Drill Group, Rubber Resistance Training Group and Air Resistance Training Group. All of them had 12 weeks of speed training by the same load and intensity. We measured the mean of each group's Serum CK and the Record on 30M Dash before and 2,4,6,8,10,12 weeks after the begining of training, By the measurements, we could trace the correlations of training periods, groups and the mean, After the analysis (Which may be used on materials for the development of speed training methods), we came to the following conclusion. ▷표 삽입◁(원문을 참조하세요.) From the test results above, we conclude that Box Drill and Rubber Resistance Training are more effective way of developing speed ability than any other speed training. With the same training load and intensity. the subjects do not show much difference in their record on 30M Dash by the change of Serum CK activity. We make the following suggestions to see a better speed training method and post research that was felt in the study to be dusirable. 1. For more exact accounts of CK in the blood, it is required to have a careful medical check up and also control of the subjects before and after the test, respectively. 2. To make the study of biochemical enzymes more useful in terms of the player's competiveness, we should do research on the spot. 3. The parachute employed for Air Resistance Group should be readapted each time and applied to each one according to his body structure and physical fitness, and a new method of parachute used training should be developed for more speed endurance of the player on the slope of 5°-10° rather than speed power at a short distance. 4. For more effective Rubber Resistance Training, a new training method should be developed whereby the player can have more impact against the floor and than absorb it and he can improve his speed power.

조경석 표면 거칠기 측정을 위한 기준평면의 적용기법 연구

안기원,이효성,서두천,신석효 慶尙大學校 1999 論文集 Vol.38 No.-

This paper presents a procedure for precision measurements of stone surface roughness by close-range digital photogrammetric technique. To obtain the stone surface roughness from the ideal surface, the best fitting reference planes were determined by least square methods. The RMSE of the normal distance between the points of the sample areas and the reference planes did exceed 0.1mm.

흰쥐 대퇴 동맥 미세 문합후 수축력의 변화

한기택,김동진,이석기 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.2

During the microvascular operation, vasospasm can be disastrous because it may cause necrosis of the flap. But we could not fully understand the pathophysiology of contraction of operated vessels. We performed microvascular anastomosis of the femoral artery in the rats and decided the maximum initia tension and intensity of electrical stimulus. At the site of operation, postoperative 1st, 2nd, 3rd, 5th and 7th days, we took the samples of vessels including microvascular anastomotic site. Using myometry, we observed the responses of the samples responding to the stimuli and compared the results to that of the other unoperated femoral artery. The contractibility of the artery was increased in the first day and remained continuously until the postoperative 7th days.

Landsat TM과 SPOT XS데이터를 이용한 디지털 모자이킹

서두천,이효성,안기원,신석효 慶尙大學校 1998 論文集 Vol.37 No.-

In digital processing of remotely sensed image data, digital mosaicking is required for display and analysis of large regions covered by more than one image. In this paper, digital mosaic process for any given multisensor data set of Landsat Thematic Mapper(TM) and SPOT multispectral(XS) data has been described. A statistical normalization was implemented to reduce radiometric discontinuity �� 새 the multisensor and multidata reflectance. An automated digital matching technique was used to find the corresponding ground control points in the overlapped area and to generate more geometrically accurate mosaic image.

Development of Hard-wired Instrumentation and Control for the Neutral Beam Test Facility at KAERI

Ki-Sok Jung,Byung-Joo Yoon,Jae-Sung Yoon,Min-Seok Seo 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.3

Since the start of the KSTAR (Korea Superconducting Tokamak Advanced Research) project, Instrumentation and Control (I&C) of the Neutral Beam Test Facility (NB-TF) has been striving to answer diverse requests arising from various facets during the project's development and construction phases. Hard-wired electrical circuits have been designed, tested, fabricated, and finally installed to the relevant parts of the system. In relation to the vacuum system I&C, controlling functions for the rotary pumps, a Roots pwnp, two turbomolecular pumps, and four cryosorption pumps have been constructed. I&C for the ion source operation are the temperature and flow rate signal monitoring, Langmuir probe signal measurements, gradient grid current measurements, and arc detector circuit. For the huge power system to be monitored or safely operated, many temperature measurement functions have also been implemented for the beam line components like the neutralizer, bending magnet, ion dump, and calorimeter. Nearly all of the control and probe signals between the NB test stand and the control room were made to be transmitted through the optical cables. Failures of coolant flow or beam line vacuum pressure were made to be safely blocked from influencing the system by an appropriate interlock circuit that will shut down the extraction voltage application to the system or prevent damages to the vacuum components. Preliminary estimation of the beam power through the calorimetric measurement shows that 87.9% of the total power of the 60㎸/18A beam with 200 seconds duration is absorbed by the calorimeter surface. Most of these I&C results would be highly appropriate for the construction of the main NBI facility for the KSTAR national fusion research project.

Development of Optical Signal Transmission for the KSTAR Project Pertaining to Instrumentation and Control of the Neutral Beam Test Stand at KAERI

Ki Sok Jung,Byung Hoon Oh 대한전기학회 2005 KIEE International Transactions on Electrical Mach Vol.5-B No.3

만성신부전증 환자에 대한 장기혈액 투석의 문제점 - 제 2 보

김기호 ( Ki Ho Kim ),손호영 ( Ho Young Son ),민병석 ( Byung Sok Min ),박성학 ( Sung Hak Park ),김호연 ( Ho Youn Kim ),방병기 ( Byung Ki Bang ),원언식 ( Un Sik Won ),고용복 ( Yong Bok Ko ) 대한내과학회 1977 대한내과학회지 Vol.20 No.1