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유기영,Yoo, Kee-young 한국정보전자통신기술학회 2014 한국정보전자통신기술학회논문지 Vol.7 No.1
In this paper, we propose a secure and efficient RFID-based patient authentication protocol to not only authenticate patients' authenticity but also protect patients' personal medical informations for u-Healthcare environments. Since the proposed RFID-based patient authentication protocol provides strong security and efficiency, it can be used practically for patient authentication and personal medical information protection on the high technology medical environments such as u-Hospital and u-Healthcare. 본 논문에서는 u-헬스케어 환경 상에서 안전하고 효율적으로 환자 인증 및 환자 개인 의료 정보를 보호할 수 있는 RFID 기반 환자 인증 프로토콜을 제안한다. 제안한 RFID 기반 환자 인증 프로토콜은 강인한 보안성과 효율성을 제공하여 주어, u-Hospital 및 u-Healthcare 같은 첨단 의료 환경상에서 환자 인증뿐만 아니라 환자 개인의 의료 정보를 안전하게 보호할 수 있음으로 실용적으로 사용되어 질 수 있다.
유기영,이동섭,Yoo, Kee-Young,Lee, Dong-Sub 유기성자원학회 2000 유기물자원화 Vol.8 No.1
The aim of this study was to evaluate the feasibilities on national recycling goal upto 40% in 2002 or more in the future. Sampling survey, Including waste generation rates, seperated recyclables and collection forces, covered households of 16,199 units, work places of 90 units and road length of 159km in Seoul. Survey results were used to calculate amounts of solid waste and recyclables according to physical properties, policy oriented measures, generator sand collection forces. This study founded followings ; Seoul's solid waste totaled 11,098ton/day, about 45% of which were recyclables and supposed to maximun level for recycling. Therefore, national goal for recycling proved to be attainable At this time,71.4% of recyclables was seperated by generators, and to stimulate the seperation activities of recyclables, endeavor of establishments, which seperated 65.6% of their recyclables, will be needed more than one of residence, which did 87.4% of their recyclables. Private forces collected 86.6% of recyclables seperated by generators, and have collection potentials equivalent to all recyclables generated in Seoul. But some incetives should be introduced to encourage private forces' activities, because values of recyclables to be collected in the future are lower than that did now.
REORDERING SCHEME OF SPARSE MATRIX.
유기영(YOO KEE YOUNG) 한국정보과학회 1978 정보과학회논문지 Vol.5 No.2
대칭인 sparse 행렬의 bandwidth와 profile을 줄이는 두개의 알고리즘을 보기를 들어 비교하였다. 여러 응용분야에서 야기되는 특별한 정사각형 adjacency graph 를 갖는 행렬에 대해 실험한 결과 비록 SMBWR- 알고리즘은 Gibbs 알고리즘보다 실행한 시간은 2배나 늦지만 bandwidth나 profile은 훨씬 더 많이 줄일 수 있음을 보여주고 있다.
유한 필드 GF(2^m)상의 시스톨릭 곱셈기 / 제곱기 설계
유기영(Kee-Young Yoo),김정준(Jung-Joon Kim) 한국정보과학회 2001 정보과학회논문지 : 시스템 및 이론 Vol.28 No.5·6
본 논문에서는 유한 필드 GF(2^m)상에서 모듈러 곱셈 A(x)B(x) mod P(x)을 수행하는 새로운 선형 문제-크기(full-size) 시스톨릭 어레이 구조인 LSB-first 곱셈기를 제안한다. 피연산자 B(x)의 LSB(least significant bit)를 먼저 사용하는 LSB-first 모듈러 곱셈 알고리즘으로부터 새로운 비트별 순환방정식을 구한다. 데이타의 흐름이 규칙적인 순환 방정식을 공간-시간 변환으로 새로운 시스톨릭 곱셈기를 설계하고 분석한다. 기존의 곱셈기와 비교할 때 제안한 곱셈기의 면적-시간 성능이 각각 10%와 18% 향상 됨을 보여준다. 또한 같은 설계방법으로 곱셈과 제곱연산을 동시에 수행하는 새로운 시스톨릭 곱셈/제곱기를 제안한다. 유한 필드상의 지수연산을 위해서 제안한 시스톨릭 곱셈/제곱기를 사용할 때 곱셈기만을 사용 할 때보다 면적-시간 성능이 약 26% 향상됨을 보여준다. In this paper, a new LSB-first multiplier with a linear full-size systolic array structure for computing the modular multiplication A(x)B(x) mod P(x) over finite field GF(2^m) is presented. A bit-wise recurrence equation which is driven from LSB-first modular multiplication algorithm using first the LSB of multiplicand B(x) is obtained. By space-time transformation, a new systolic multiplier is designed from the recurrence equation with regular data flows, and then is analyzed. The area-time performance of the proposed systolic multiplier is improved by 10% and 18%, respectively compared to two well-known multipliers. Moreover, a new systolic multiplier/squarer for computing multiplication and square simultaneously is proposed by using the same design method. For the modular exponentiation over the finite field, the use of the proposed systolic multiplier/squarer shows 26% better area-time performance than the use of only multiplier.
저탄소ㆍ저비용형 서울시 분뇨처리권역 재설정기법 개발 연구
유기영(Kee-Young Yoo),홍재선(Jae-Sun Hong) 서울연구원 2012 서울연구원 정책과제연구보고서 Vol.- No.-
There are three night-soil treatment plants in Seoul and each plant has its own service area based on 25 Gu(districts). Recently Seonam plant, one of three plants, is planed to double it’s existing design capacity, 2,000 tons per day. On the contrary, Nanji plant is supposed to cut down volume of treated night-soil, because the amount of nitrogen or phosphorus contained in night-soil is getting closer to the permission level, 10% of nitrogen or phosphorus originated from sewage. Also, it is not certain if existing service areas are reasonable. Hence it is necessary to reevaluate the existing service area of three night-soil treatment plants. This study aims to develop a methodology for zoning three plants’ service areas, satisfying both lower greenhouse gas emission and cost. Another major purpose is to recommend alternative service areas, reflecting various circumstances. Seoul has about 600 thousand septic tanks for flush toilet, and they are legally demanded to clean up more than once a year, resulting in 10,817 tons septage in 2011. With septage growing year by year, three treatment plants have already faced capacity shortages. The shortage is barely managed by overuse of Seonam plant. In methodology, design capacity of night-soil treatment plant, acceptability of sewage treatment plant, greenhouse gas emission and cleaning cost were chosen as evaluation indices. Service area can be drawn up through the evaluation process, which include defining calculation elements, setting up scenarios and their goals, calculating and comparing scenario goal with final draft. Considering the present, near future or ideal situation, five scenarios were set up. The ideal service area turns out impractical because it inevitably leads the septage volume and amount of nitrogen or phosphorus in Joongnang plant to exceed regulated level. Existing service area is so reasonable that the shift of service plant for Jung-gu from the Nanji plant to the Joongnang is only beneficial and other changes aggravate the problems. The enlargement of the Seonam is a crucial way to solve the problems. When the enlargement of the Seonam is complete, Seonam’s service area would increase from 6 Gu to 9 Gu and in the other hand the Nanji’s would lessen from 8 Gu to 6 Gu. In case without the enlargement of the Seonam, it would be recommendable to lower the load on the Nanji by reducing existing 8 Gu to 7 Gu. All change of service area would necessarily demand change of user charge for cleaning septic tanks, and results from this study, might be helpful to assess the costs related to labor and vehicle requirement.