• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.684-691
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• 2004

준설매립 및 연약지반 처리에 있어 압밀촉진 공법들에 대한 연구가 활발하다. 본 연구에서는 초음파를 사용하여 압밀촉진을 유발하고자 하였고 그 영향 정도를 실내실험을 통하여 조사하였다. 실내시험은 특별히 제작된 압밀시험기를 사용하였으며 압밀시험 중 초음파를 시료에 직접 가할 수 있도록 고안되었다. 압밀시험 재료로는 원심력 시험기를 사용하여 원하는 조건에 맞는 동질의 시룔르 제작하여 사용하였으며 초음파 강도, 처리 시간을 달리하여 시험을 실시하였다. 시험결과 초음파가 압밀에 미치는 영향은 큰 것으로 나타났으며 초음파 처리의 영향에 미치는 정도가 시험조건에 따라 다르게 나타났다. 본 연구의 결과를 이용하여 초음파에 의해 압밀촉진을 위한 공법개발의 가능성을 파악하였다.

• 한국전기전자재료학회논문지
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• 제28권3호
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• pp.191-195
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• 2015

Inside the existing superconducting cables, the superconducting wire carries a loss-free current, and the cable former (the stranded copper wire) bypasses the fault current to prevent damage and loss of the superconducting cable when the fault current is applied. The fault-current-limiting-type superconducting cable proposed in this paper usually carries a steady current; but in a fault state, the cable generates self-resistance that makes the fault current lower than a certain width. That is, the superconducting cable that transmitted only a low voltage and a large capacity power repetitively limits the fault current, as does a superconducting current limiter. To complete this structure, it is essential to investigate the mutual resistance relationship between the superconducting wires after applying a fault current. Therefore, in this paper, one kinds of superconducting wires (a wire without a stabilization layer) were connected parallel 4 tapes, respectively; and after applying a fault current, the current, voltage, resistance and thermal stability of the HTS thin-film wires were examined.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.190-190
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• 2010

The resistance and recovery properties of the YBCO thin-film wire according to the existence and thickness of an insulting layer, and the kinds of stabilization layers, were analyzed at 90 K, 180 K and 250 K. In this study, YBCO thin-film wires with different stabilizing layers and with insulating layers were examined in terms of their various characteristics, such as quenching occurrence, spread, and distribution, based on their resistance increase trends and their recovery from quenching, and the results were qualitatively explained. The results of this study on the characteristics of YBCO thin-film wires' superconducting and normal-conducting phase changes are expected to be useful in designing superconducting power machines and in improving their performance.

• 한국콘텐츠학회논문지
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• 제15권10호
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• pp.18-25
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• 2015

한류열풍이후 연기예술 분야가 산업화하면서 콘텐츠 투자의 안정화를 위한 배우경영의 과학화에 대한 요구가 높아졌다. 이에 따라 본 연구는 학제간 연구를 통해 융합적인 관점에서 새로운 배우 평가모델을 마련하기 위해 시작되었다. 문헌고찰을 통해 배우평가 요소들을 엄선해 분류하고 델파이기법을 적용하여 전문가들이 컨센서스를 이룬 결과, 배우의 평가요소는 자질적 요소인 연기 및 소통 능력, 신체 조건과 이미지, 연기와 작품에 대한 적극성과 열정, 작품 및 제작환경에 대한 이해도, 배우철학과 자기관리의 안정성, 성과적 요소인 시청자와 관객 동원 능력, 스타덤, 팬덤, 작품 경력, 네트워크 등 10가지로 도출되었다.

• 한국관개배수논문집
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• 제17권2호
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• pp.71-81
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• 2010

Stream Pilot Project, which began in May 2003 and finished in December 2003, was selected to develop effective methods applicable to nature-like streams. Stream restoration projects aim to maintain or increase ecosystem goods and services while protecting downstream and coastal ecosystems. Fields environmental monitoring such as flow discharge and precipitation were conducted along the Idong stream for amount of channel zone change in 2007. This study selected three monitoring positions to measure the water level and discharge of flowing water. A stage-discharge relation is obtained from direct discharge measurements for three stations by fitting an empirical relationship to the data set. Since discharge measures are made only for low flow conditions, a curve of discharge against stage can then be built by fitting these data with a power curve. And this study used data obtained from floodmark checkup as well as HEC-RAS model to analyze the hydrodynamic characteristics of monitoring sites. Reach-averaged hydraulic parameters for the supply reach were calculated from the small area's HEC-RAS model for Idong stream, and a HEC-RAS model used to analyze hydraulics for a period in 2007, after the stream was considered bank stabilization.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.174-176
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• 2002

전력산업 구조개편이 진행되면서 국내의 수요관리에 대한 정책도 변화하고 있는 실정이다. 수용 가에 계량 및 원격제어를 할 수 있는 시스템이 설치되고 이를 통하여 원격에서 부하를 하단하고 참여하는 수용가에 보상금을 지급하는 방식인 직접부하제어 방식은 부하 관리 자원 이용 가능성의 우의, 성과계량의 용이, 비용 효과 증대 동의 이유로 인하여 최근 많은 각광을 받고 있으며 한국전력, 에너지 관리공단에 의하여 시범적으로 국내에 도입되었다. 또한, 다수의 수용가에 대한 대표성을 가지며 수용가의 부하를 관리하여 직접부하제어를 대 행하는 민간기관인 부하관리 사업자가 국내에 생겨나게 되었다. 부하관리 사업자는 약정을 체결한 다수의 수용가 부하를 자원으로 하여 현재의 수요관리에서 직접부하 관리에 참여 할 수 있으며 향 후 도매경쟁체제에서는 확보한 부하 자원을 이용하여 다양한 방법으로 시장에 참 여할 수 있는 기회를 가지게 된다. 부하관리 사업자를 활성화하기 위해서는 수익을 창출할 수 있는 사업모델이 필요하며 활성화 되면 활용할 수 있는 부하자원의 양이 많아지게 되어 전력시장의 안정화를 위한 역할을 할 수 있게 될 것으로 기대된다.

• 한국정밀공학회지
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• 제31권5호
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• pp.375-380
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• 2014

To enhance biocompatibility between the orthopedic implant stem and obsteoblast cells, bone-forming cells, micro-size holes are patterned in Ti plate surface. Initially, the house built laser power stabilization system is applied to the laser micro patterning machine to convince repeatable result. Various pulse widths are irradiated Ti plate and relationship between diameters of patterned holes and pulsed width is derived. Effect of multi pulse is observed and optimal pulse number is considered to avoid heat affected zone. After MG-63 osbeoblast cells are cultured, micro patterned Ti plates are compared with control plates. In SEM image, cells are well aligned and aggregation is observed in both 60, and $100{\mu}m$ patterned plates. Finally, free form surface stem model is prepared to test micro hole patterning.

• 전기학회논문지
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• 제67권8호
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• pp.1055-1061
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• 2018

Recently, due to the rapid development of electric vehicle and energy storage system, it is emphasized for battery management system to be needed and to be improved. BMS carries out various movement for optimization the use of the energy and safe use of secondary battery, these movement of BMS start at high wattage shunt fixed resistor which performs a function for detecting current among the BMS components. In addition, for the safe operation of secondary battery, the reliability of current voltage variation detected from shunt should be secured, and for corresponding characteristics, the quality of Temperature coefficient of resistance for BMS shunt and the quality of Thermo electromotive force all must be excellent. For these reasons, this study comes up with the stabilization plan for thermo electromotive force and temperature coefficient of resistance of BMS shunt resistor which is key to secondary battery operation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 C
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• pp.1612-1614
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• 1994

Modulators Installed in PLS(Pohang Light Source) Linac are composed of a DC high voltage section, a charging section and a discharging section. PFN is charged by a resonant charging mechanism, and discharged by a switching device through the primary of the pulse transformer connected to a load. Charged PFN voltage must be well regulated to obtain stable output pulse voltage at the load. For this purpose, DCHV is controlled by a SCR controller with feedback signal, and PFN voltage is regulated by a De-Q'ing circuit. The full power operation test shows the pulse voltage regulation within ${\pm}0.13%$ with SCR feedback control alone, and within ${\pm}0.08%$ together with De-Q'ing. This paper describes the design concept and operational characteristics of the De-Q'ing circuit.

• 대한안전경영과학회지
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• 제10권1호
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• pp.91-105
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• 2008

Nowadays, circulation industry is taking charge of important role in improvement of competitive power on the manufacturing industry and public welfare increase of consumer, price stabilization, employment creation and so on. A lot of research have been progressing for formation of total circulation complex, but decision making for selection of location on some facility is only calculated the optimum value when correct data values are inserted. However, a lot of decision making is accomplished in situation that have little knowledge of objective and constraints and as real world is also evaluated inclusive of analyst's subjectivity about variable, indefinite and fuzzy part, so it is decreasing a reliability on evaluation result and complicating objective evaluation on various effect and negative impact. Accordingly, from under like this situation, this study is to develop location decision model of circulation complex using fuzzy theory from the intention for the most reasonable decision making in fuzzy situation based on decision making problem on conventional location and size decision that did to be satisfactory constraints necessarily.