• Journal of Advanced Marine Engineering and Technology
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• 제23권6호
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• pp.755-760
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• 1999

To remove nitrogen oxides(NOx) in exhaust gas of diesel engine three-way catalytic process with plasma discharger has great possibilities. Characteristics of NOx removal depends on NO conver-sion to $NO_2$ and /or $HNO_3$ due to high activation energies for NO oxidation and reduction, NOx removal efficiency by using three-way catalytic with plasma discharger indicated about 50% at 40watt power consumption condition.

• 천문학회보
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• 제38권1호
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• pp.46.1-46.1
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• 2013

High velocity clouds (HVCs) are H I clouds that move with large speed (${\mid}V_{LSR}{\mid}$ >100 km/s) in the halo of the Milky Way. It is now evident that at least some populations of HVCs originated from extragalactic sources, either primordial gas left over from the galaxy formation or gaseous material stripped off from other galaxies closely passing by the Milky Way. HVCs with extragalactic origin play an important role in the star formation of the Milky Way when they eventually collide with the disk of the Milky Way. Although it is still observationally controversial whether HVCs are surrounded by dark matter or not, it is theoretically interesting to investigate the effect of dark matter on the collision of HVCs with the disk of the Milky Way. We model this scenario by using hydrodynamic simulations and search for proper parameters that explain the currently available observations such as the Smith Cloud that is thought to have collided with the Galactic disk already.

• 한국정보통신학회논문지
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• 제25권12호
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• pp.1882-1889
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• 2021

본 논문은 타원곡선 암호에 핵심 연산으로 사용되는 모듈러 곱셈의 고성능 하드웨어 구현에 대해 기술한다. NIST P-521 곡선에 적합한 521-비트 고성능 모듈러 곱셈기를 3-way Toom-Cook 정수 곱셈과 고속 축약 알고리듬을 적용하여 설계하였다. 정수곱셈 결과에 3이 곱해져 출력되는 3-way Toom-Cook 알고리듬의 속성을 고려하여, 피연산자에 1/3을 곱한 Toom-Cook 도메인 상에서 모듈러 곱셈이 연산되도록 구현하였다. 모듈러 곱셈기를 xczu7ev FPGA 디바이스에 구현하여 하드웨어 동작을 검증하였으며, 69,958개의 LUT와 4,991개의 플립플롭 그리고 101개의 DSP 블록의 하드웨어 자원이 사용되었다. Zynq7 FPGA 디바이스에서 최대 동작주파수는 50 MHz으로 예측되었으며, 초당 약 416만 번의 모듈러 곱셈을 연산할 수 있는 것으로 평가되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권2호
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• pp.811-829
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• 2015

One-way authenticated key agreement protocols, aiming at solving the problems to establish secure communications over public insecure networks, can achieve one-way authentication of communicating entities for giving a specific user strong anonymity and confidentiality of transmitted data. Public Key Infrastructure can design one-way authenticated key agreement protocols, but it will consume a large amount of computation. Because one-way authenticated key agreement protocols mainly concern on authentication and key agreement, we adopt multi-server architecture to realize these goals. About multi-server architecture, which allow the user to register at the registration center (RC) once and can access all the permitted services provided by the eligible servers. The combination of above-mentioned ideas can lead to a high-practical scheme in the universal client/server architecture. Based on these motivations, the paper firstly proposed a new one-way authenticated key agreement scheme based on multi-server architecture. Compared with the related literatures recently, our proposed scheme can not only own high efficiency and unique functionality, but is also robust to various attacks and achieves perfect forward secrecy. Finally, we give the security proof and the efficiency analysis of our proposed scheme.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2002년도 봄 학술발표회 논문집
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• pp.388-391
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• 2002

의류용 소재의 다양화와 소재의 복합화에 따라 최근 여러 가지의 합성섬유 관련소재가 선을 보이고 있다. 그 중 double covering two way 이질 복합사 제품은 high touch 및 fashion 용 차별용도의 최적소재를 도출하여 기존의 제품과는 차별화 할 수 있다는 점과, 기존 제품과는 그 물성이 전혀 다른 새로운 소재의 제품을 생산함에 따라 품질 고급화에 크게 기여할 수 있다는 점에서 그 중요성을 가지고 있다. (중략)

• 대한기계학회논문집
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• 제18권6호
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• pp.1374-1381
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• 1994

This study suggests a new type shaft generating system driven by hydrostatic transmission suitable for small size vessels. In this system, the hydraulic motor speed is controlled by displacement adjustment using a 3-way high speed on/off valve. The 3-way high speed valve is operated by PWM control signal. In this study, a digital robust servo control algorithm is applied to the controller design of the system. By experiments and numerical computations, the frequency variation characteristics of the generating system under various disturbances are investigated. Conclusively, it is said that the shaft generating system proposed in this study shows excellent control performances.

• 한국컴퓨터정보학회논문지
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• 제18권2호
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• pp.1-8
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• 2013

본 논문에서는 4Ghz의 빠른 클럭 속도의 CPU에 적합한 고성능 L1 캐시 메모리 구조를 제안한다. 제안된 캐시 메모리는 빠른 접근 시간을 위한 직접사상 캐시와 시간적 지역성을 고려한 2-way 연관사상 버퍼 그리고 버퍼 선택 테이블로 구성된다. 빠른 접근 시간을 보장하는 직접사상 캐시는 가장 최근 접근한 데이터를 저장하게 된다. 만약에 직접사상 캐쉬로부터 추출되는 데이터가 다시 참조되어질 높은 확률을 가지는 데이터이면 그 데이터들은 2-웨이 연관사상 버퍼로 선택적으로 저장되어 진다. 그리고 고성능과 저전력의 효과를 높이기 위하여 2-웨이 연관사상 버퍼중 하나의 웨이만 선택적으로 먼저 접근되어지며, 이러한 동작은 버퍼 선택 테이블에 의해 선택된다. 시뮬레이션 결과에 따르면, 에너지 소비와 평균 메모리 접근 시간을 고려한 에너지$^*$지연시간에서 두배 이상의 크기를 가지는 직접사상 캐시, 4-웨이 연관사상 캐시 그리고 희생 캐시에 비해 각각 45%, 70% 그리고 75%의 성능향상을 이루었다.

• 산업융합연구
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• 제6권2호
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• pp.1-27
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• 2008

This thesis is to analyze and investigate the influence of behaviors towards an organization of public officials due to the way their parents raised them. I tried to find out how their parents' raising way influences the individual characteristics, the human relationship, the job satisfaction, and the organizational commitment. It is proved that the personal characteristics of the organization members affect the human relationship in organization strongly. It is also proved that the way their parents raised them affects the personal characteristics. Therefore I can suggest that the way parents raised children affects the organizational behavior strongly. In addition to that, the personal characteristics of each public official highly affect the human relationship such as the relationship with seniors, colleagues, and subordinates in organization. I know that the way their parents raised them strongly affects the human relationships in organization. In order to find out the influence of organizational behavior of public officials due to the way their parents raised them, I used the Pearson's correlation analysis. I find that the public officials who lived with positive parents have high job satisfaction and organizational commitment, and have high self-esteem, self-control, responsibility, and have good relationship with their senior and colleagues administrative public official. Also, from this study we can find out the influence which parents' attitude has on children's satisfaction and devotion as adults. Therefore this study can suggest a new direction of public administration.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 춘계학술대회 논문집
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• pp.283-288
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• 1995

Dynamic model of 3-way PWM high speed solenoid valve was derived considering reluctance and inductance of electromagnet through valve spool by Bondgraph modeling method. Computer simulations of hydraulic system with 3-wayhigh speed solenoid valve were performed and the results were compared to te experimental results in order to validate the PWM valve dynamic model obtained.

• 한국건축시공학회지
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• 제3권4호
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• pp.111-117
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• 2003

Recently SAMWOO EMC received order and built interior walls which was used the day process in several high-rise compound buildings. On the way to build, this process was brought about several matter according to the progress and qualify control. So, this study is the improving way of the dry process from experiences on those constructions