• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2725-2728
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• 2003

The manipulability of robot provides useful Information for the design and path planning of robots. This paper shows an influence of joint velocities to acceleration of robot end-effector using a dynamic manipulability polytope. The main idea of this paper is that the dynamic manipulability polytope of robot can be divided to three intermediate polytope, the torque-dependant polytope, velocity-dependent polytope, and gravity-dependant polytope. The velocity-dependant polytope is made from the limits of robot joint velocities while the torque-dependant polytope is made from the limits of the joint torques. Combining of these two intermediate polytopes and considering the gravity-dependant polytope, the overall dynamic manipulability polytope of robot is obtained. This investigation will be useful on the field of space robot and high-speed application.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 가을 학술발표회 논문집
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• pp.585-590
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• 2003

To overcome the drawbacks of conventional load control method and displacement control method, the so-called volume control method was developed by utilizing a pressure node added into a finite shell element. In this study, an improved volume control method which can analyze path-dependant behaviors of RC shell structures subjected to cyclic loading effectively is developed. RC shell structures are discretized with layered shell elements and in-plane two dimensional constitutive equations for concrete and reinforcements are implemented for each layer of the shell elements. Validity of the so-called path dependant volume control method is also verified by comparing analysis results with other data including experimental results.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.41-44
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• 2008

Fiber Reinforced Plymers (FRPs)는 기존 보수 보강재료에 비해 높은 강도, 내부식성, 절연성등 뛰어난 역학적 특성으로 인하여, 최근들어 기존 구조물의 보수 및 보강에 FRP를 이용한 외부부착 공법 이 활발하게 사용되어지고 있다. 현재 국내 외적으로 FRP 재료를 이용한 외부부착 공법이 적용된 철근 콘크리트보에 관한 연구는 활발히 진행되고 있으나 시간 의존적 거동에 관한 연구는 아직 미흡한 실정이다. 이에 대하여 본 연구에서는 무보강 RC보, Carbon Fiber Reinforced Plymers(CFRPs) 와 Glass Fiber Reinforced Plymers (GFRPs)로 보강된 철근콘크리트보 실험체를 제작하여 약 300일간 25KN의 지속하중을 받은 FRP 보강보의 시간경과에 따른 처짐, 변형률 그리고 온도 변화의 영향을 관찰하였다. 실험 결과 CFRP로 보강된 실험체는 GFRP로 보강된 실험체보다 시간의존적 거동에 있어 더 우수한 보강성능이 있음을 확인할 수 있었다.

• 디지털융복합연구
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• 제13권9호
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• pp.541-551
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• 2015

본 연구는 당뇨병 환자에게 적용한 중재프로그램의 효과를 분석한 국내 연구논문의 내용을 분석한 연구이며, 검색은 Riss4u, 국회도서관, 국립 중앙도서관 등을 이용하였다. 검색어는 "당뇨병 환자", "당뇨병환자와 교육", "당뇨병환자와 운동", "당뇨병환자와 중재", "당뇨병환자와 교육 또는 운동"이었다. 선정기준에 적합한 53편의 논문을 중재프로그램의 적용방법 및 효과변수로 구분하여 분석하였고, 유형은 총 8가지이며 사용된 효과변수는 113가지이다. 가장 많이 사용된 유형은 교육과 상담을 동시 적용한 경우 이며 당 대사, 자가 간호, 자기 효능감이 자주 사용되는 종속변수였다. 중재프로그램의 적용방법은 다양하였으며, 효과변수의 결과는 효과가 없거나 상이한 경우도 있었다. 향후 중재프로그램의 기대효과를 높이기 위해서는 디지털 융합 시대에 적합한 체계적인 내용 구성 및 운동이 적극적으로 포함되어야 할 것이며, 또한 사회 심리적 변수를 포함한 효과변수의 선정 및 효과변수 측정법에 대한 고려가 필요하다.

• Childhood Kidney Diseases
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• 제13권2호
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• pp.271-277
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• 2009

저자들은 스테로이드 의존형 신증후군 환자에서 진단 8년 만에 두경부 종물이 발생, 혈액 검사상 IgE 증가와 호산구 증가, 경부 컴퓨터 단층 촬영으로 기무라병을 진단하였고, 스테로이드로 치료하였으며, cyclosporine을 투여한 이후 장기간 두경부 종물과 신증후군의 재발을 억제할 수 있었기에 문헌고찰과 함께 보고하는 바이다.

• 성인간호학회지
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• 제24권3호
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• pp.253-265
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• 2012

Purpose: The focus of this research was a systematic review of published articles and theses for a degree in Korea and foreign countries on rehabilitation therapy for patients with total knee arthroplasty (TKA). Methods: The literature until December in 2011 were searched and the data basis included Medline, CINAHL, KERIS, National Library of Korea, and National Assembly Library web sites. Words for the search were TKA or TKA and rehabilitation. Studies included randomized controlled and non-equivalent control group pretest-posttest design. 31 studies were analyzed focusing on type, application method, dependant variable and effect using descriptive statistics. Results: Seventeen rehabilitation therapies and forty-nine dependant variables were used. The application methods of rehabilitation therapy were diverse. The most frequently used rehabilitation type was an exercise therapy and a pain/discomfort was the most frequently used dependant variable. The effects of rehabilitation therapy were inconsistent. Conclusion: The individualized rehabilitation therapy must be comprised of type, time, frequency, period and duration. Attention must be made as to the research design, especially the better measurement of the dependent variables. This review may serve as a base for future research.

• 지질공학
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• 제4권1호
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• pp.91-93
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• 1994

• ETRI Journal
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• 제35권1호
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• pp.158-161
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• 2013

This letter proposes a low-power current-steering digital-to-analog converter (DAC). The proposed DAC reduces the clock power by cutting the clock signal to the current-source cells in which the data will not be changed. The 10-bit DAC is implemented using a $0.13-{\mu}m$ CMOS process with $V_{DD}$=1.2 V. Its area is $0.21\;mm^2$. It consumes 4.46 mW at a 1-MHz signal frequency and 200-MHz sampling rate. The clock power is reduced to 30.9% and 36.2% of a conventional DAC at 1.25-MHz and 10-MHz signal frequencies, respectively. The measured spurious free dynamic ranges are 72.8 dB and 56.1 dB at 1-MHz and 50-MHz signal frequencies, respectively.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2713-2716
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• 2003

This paper presents a dynamic manipulability analysis method of the limb moving in viscous fluid. The key idea of the presented method is that the boundary of joint velocity can be converted to the velocity-dependant dynamic manipulability polytope through the coriolis, centrifugal and drag terms in dynamic equation. The velocity-dependant dynamic manipulability polytope is added to the inertial and restoring force manipulability polytope to get overall manipulability polytope of the limb moving in the fluid Each of the torque and velocity bounds arc considered in the infinite norm sense in joint space, and the drag force of a limb moving in fluid viscous is modeled as a quadratic form An analysis example with proposed analysis scheme is presented to validate the method.

• 대한전기학회논문지:전력기술부문A
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• 제53권9호
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• pp.487-493
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• 2004

The electric power industry throughout the world is undergoing considerable changes from the vertically integrated utility structure to the deregulated market. However, the deregulated electricity market is operated with respect to theory of economical efficiency, and therefore, the system operator requires data with fast contingency ranking for security of the bulk power system. This paper compares the weather dependant probabilistic risk index(PRI) with the system performance index for power flow in the IEEE-RTS. The system performance index for power flow presents the power system stability. This paper presents fast calculation method for determining contingency ranking using the weather dependant probabilistic risk index(PRI). The probabilistic risk index can be classified into the case of normal and adverse weather. This paper proposes calculation method using the probabilistic risk index in determining contingency ranking required for security under the deregulated electricity market.