• 한국임상수의학회지
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• 제27권4호
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• pp.382-385
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• 2010

This study was performed to investigate the wound healing effects of Allium cepa L. on Staphylococcus intermedius contaminated wound. 4 full-thickness skin wounds ($2\;cm{\times}2\;cm$) were made in the back and Staphylococcus intermedius was inoculated in seven dogs. In each dog, the wounds were treated with onion extract (experimental group) and normal saline (control group), respectively. The wound contraction rate of the experimental group was higher than that of the control group during the experimental period. The occupation rate showed that the wounds of the experimental groups contracted more vigorously than that of the control group in the early period of wound healing. The mean value of tensile strength on the 22 day after wounding was $4,741{\pm}848\;g/cm^2$ in the experimental group and $2,400{\pm}397\;g/cm^2$ in the control group. The number of S. intermedius in the experimental groups was decreased more rapidly than that of the control group. These results suggest that application of activated onion extract in like full-thickness skin wounds promote wound healing.

• 패션비즈니스
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• 제5권4호
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• pp.118-126
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• 2001

The purpose of this study, which is related with local women's jacket Manufacturing companies in Seoul and Kyeong-Ki areas, is for the research of general problems, badness in those companies, noticing products' quality level, and full solutions of luxurious sewing technology and high quality products. The results of this study are as follows. 1. Most women's jacket manufacturing companies are poor and producing system is on a changing trend to the pair system. 2. A wage level of inspectors are low compared with working experiences and working period is short compared with working experiences. So, the separation rate was high. 3. The inspection form is full style, but some companies are just inspecting samples or frequent check. 4. Insperation method is highly at the rate of self-inspection and head office inspection. There are inspects in their factories and companies, but some companies don't. 5. There are lots of badness styles such as shrinking of fabric, contaminating of product, dying of fabric, pressing. 6. A work standard, workers' technical education, and giving purposes to workers are demanded for avoiding of products badness.

• KDI Journal of Economic Policy
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• 제34권2호
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• pp.17-40
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• 2012

본 논문은 불완전한 금융계약하에서 발생하는 자본투자의 외부성에 대하여 연구하였다. 계약이행의 불완전한 경우의 제약된 효율적 자원배분(constrained efficient allocation)의 문제를 풀었고, 완전 위험분담(full risk-sharing)이 가능하지 못한 경제상황에서는 자본투자가 양의 외부성을 갖는 것을 보였다. 경쟁균형에서 자본투자 한 단위의 증가는 경제주체의 파산가치(autarky value)를 증가시켜 경제 내에서 외부성을 발생시키는데, 이러한 외부성은 양의 자본소득과세에 대한 이론적 근거를 제시할 수 있으며, 정부는 이러한 외부성을 내생화시키기 위하여 양의 값의 선형자본세(linear capital tax rate)를 사용할 수 있다.

• 한국컴퓨터정보학회논문지
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• 제4권4호
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• pp.101-112
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• 1999

NPEG은 ISO 산하의 표준화 위원회에서 동영상 압축 기술의 필요에 의해 표준화된 동영상 압축 기술로 통신상에서 더 높은 비트율의 고화질 동화상 실현의 요구에 의해 1995년에 MPEG 2가 개발되었다. 본 논문에서는 VBR MPEG의 코드화된 완전한 동화상 통신을 위해 비선형 시계열 방식으로 효율적이고도 정확한 TAR모델 설계 알고리즘을 제안하며 실질적인 동영상 비디오 추적에 대한 통계적 특성을 보여주는 시뮬레이션 결과를 제시하고자 한다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제14권4호
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• pp.471-477
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• 2014

In this paper, a modeling and co-simulation methodology is proposed to predict the radiated electromagnetic interference (EMI) from on-chip switching I/O buffers. The output waveforms of I/O buffers are simulated including the on-chip I/O buffer circuit and the RC extracted on-chip interconnect netlist, package, and printed circuit board (PCB). In order to accurately estimate the EMI, a full-wave 3D simulation is performed including the measurement environment. The simulation results are compared with near-field electromagnetic scan results and far-field measurements from an anechoic chamber, and the sources of emission peaks were analyzed. For accurate far-field EMI simulation, PCB power trace models considering IC switching current paths and external power cable models must be considered for accurate EMI prediction. With the proposed EMI simulation model and flow, the electromagnetic compatibility can be tested even before the IC is fabricated.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.461-465
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• 1996

Position and rate control modes arc the two common modes for controlling remote manipulators with joysticks or hand controllers. Generally, position mode is easier for teleoperation than rate modes, when the manipulation work space is small or comparable to the human operator's control space. When the telemanipulator's work space is very large, human operator's control motion range must be large to allow telemanipulator's full range of motion resulting poor control resolution. One way to solve the poor resolution problem is to use indexing. However, rate mode can provide any higher degree of resolution without use of indexing. If two modes are mixed, master controller will be more convenient. The mixed mode algorithm, changes operating mode from position mode to rate mode or vise versa using fuzzy logic. The fuzzy logic algorithm, which has been designed to recognize the teleoperator's intended motion properly, provides an intelligence to a master controller.

• International Journal of Concrete Structures and Materials
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• 제19권1E호
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• pp.25-32
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• 2007

The fracture energy evaluated from the previous experimental results can be simulated by using the modified singular fracture process zone (S-FPZ) model. The fracture model has two fracture properties of strain energy release rate for crack extension and crack close stress versus crack width relationship $f_{ccs}(w)$ for fracture process zone (FPZ) development. The $f_{ccs}(w)$ relationship is not sensitive to specimen geometry and crack velocity. The fracture energy rate in the FPZ increases linearly with crack extension until the FPZ is fully developed. The fracture criterion of the strain energy release rate depends on specimen geometry and crack velocity as a function of crack extension. The behaviors of micro-cracking, micro-crack localization and full development of the FPZ in concrete can be explained theoretically with the variation of strain energy release rate with crack extension.

• 한국기계가공학회지
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• 제11권5호
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• pp.48-53
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• 2012

A non-linear vehicle model and an observer are designed to observe the yaw rate and the body side slip angle when a vehicle is turning maneuver in this study. The developed vehicle model is a full car model and has fourteen degree of freedom. A Luenberg observer is applied to develop the observer. The vehicle model is validated with a reference result and shows good accordance. The observer is tested on dry asphalt, wet asphalt and snow paved road. The results prove the performance of observer is robust and reliable.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2006년도 제26회 춘계학술대회논문집
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• pp.187-192
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• 2006

본 논문에서는 추력 30톤급 액체로켓엔진의 실물형 연소기 물냉각 연소시험 성능결과에 대해 기술하였다. 연소기 연소압력은 53bara 그리고 추진제 유량은 90kg/s이다. 30톤급 실물형 연소기에 대한 첫 채널 냉각 연소시험인 관계로 연소실 채널로 냉각수 물을 케로신 설계 냉각 체적 유량의 110%인 35kg/s와 케로신 냉각과 비슷한 성능을 갖는 유량 18kg/s에 대한 연소시험을 수행하였다. 각각의 연소시험 결과에 대해 기술하였으며, 채널 냉각 연소실에서 냉각 성능이 충분해 케로신 냉각 연소시험이 가능하다는 것을 알 수 있었다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2006년도 제27회 추계학술대회논문집
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• pp.309-315
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• 2006

분사기 설계에 따른 실물형 가스발생기의 연소 특성에 대한 연구를 수행하였다. 가스발생기에 공급되는 총 추진제의 유량은 같으면서도 분사기 설계에 따라 분사기당 유량이 달라지는 실물형 가스발생기 3대가 제작되었다. 각 가스발생기에는 13개, 19개, 37개의 내부 혼합형 이중 스월 분사기가 배치되었다. 연소시험 결과, 13개, 19개 분사기를 장착한 가스발생기는 축방향 공진주파수에 해당하는 섭동이 발생하지 않았지만, 37개 분사기가 장착된 가스발생기의 경우 강도가 작긴 하지만 축방향 공진주파수에 해당하는 연소불안정 현상이 나타나고 있다. 분사기 헤드에 배치된 분사기 수가 증가할수록 연소실내의 온도 분포는 작은 편차를 보이지만, LOx post의 손상은 증가하는 것을 알 수 있었다.