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RF 마그네트론 스퍼터링 법에 의한 ATO 투명전도막의 특성
이성욱,박용섭,홍병유,Lee, Sung-Uk,Park, Yong-Seob,Hong, Byung-You 한국결정성장학회 2008 韓國結晶成長學會誌 Vol.18 No.2
본 연구에서는 ATO 박막의 전도 특성향상을 위하여 RF 마그네트론 스퍼터링을 이용하여, 6 wt%의 Sb가 첨가된 $SnO_2$ 박막을 합성을 진행하였으며, 박막합성시 스퍼터링 가스인 아르곤(Ar)과 반응가스인 산소($O_2$)의 분압 비율의 증가에 따른 ATO 박막의 구조적, 전기적, 광학적 특성들의 고찰하였다. 결과적으로 산소/아르곤의 비율이 0.11에서 $8{\times}10^{-3}[{\Omega}{\cdot}cm]$의 비저항과 85.17%, 그리고 retile 구조의 이상적인 전도특성과 투과특성, 그리고 결정화를 이룬 ATO 박막 얻었다. In this study, we synthesized ATO films using RF magnetron sputtering method consisted of $SnO_2$ target added Sb of 6 wt% and investigated the effect of $O_2$ on structural, electrical, and optical properties of ATO films. As a result, in case of $O_2$/Ar ratio of 0.11, we obtained ATO films exhibit the properties such as the resistivity about $8{\times}10^{-3}[{\Omega}-cm]$, the transmittance of 85.17%, and retile structure.
호텔직원의 감정노동이 스트레스와 고객지향성 및 이직의도에 미치는 영향 - 신체적 및 심리적 스트레스의 매개변수으로 -
이성욱 ( Lee Sung-uk ),이승연 ( Lee Seoung-youn ) 한국호텔리조트학회 2021 호텔리조트연구 Vol.20 No.6
This study set externally emotional labor and inner emotional labor antecedents of emotional labor, and the stress of physical stress and psychological stress and how it affects the outcome variables of influence, and finally on turnover intention was to measure customer orientation. Such research is conducted to derive more substantial implications for human resource management and operation of the hotel industry, largely effective training of hotel staff and perform emotional labor. Therefore, the progress of the study was carried out with the following method and range. The antecedents of emotional labor through Literature Review on the labor theory of emotion were selected externally inner emotional labor and emotional labor. Parameters were selected to physical stress and psychological stress of the stress and the degree of customer orientation and turnover chosen as outcome variables. The suitability of the proposed model was confirmed using the structural equation model. The suitability of the model was generally recognized and the research hypothesis was verified based on the suitability of the proposed model.
이성욱(Sung-Uk Lee),조재완(JaiWan Cho),정승호(Seungho Jung) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
During the last two decades, the automation in construction industry has been extensively studied. Various robots for construction, such as a horizontal concrete distributor, concrete floor leveler, concrete surface treatment robots and steel frame welding robot, were developed. Particularly, for a high-rise building, the automated building construction system (ABCS) was proposed at 1989 in Japan. The ABCS has been applied five times in about ten years. Recently the research on the construction automation and robot is studied in domestic construction industry. Therefore, we discuss the state of the art on construction automation and construction robot in domestic and foreign construction industry in this paper.
3 차원 DIC 기법을 이용한 피복관 튜브의 인장 시험
이성욱(Sung-Uk Lee),오홍렬(Hongrual Oh),김동현(Dong-Hyun Kim),김재용(Jae-Yong Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
사고 저항성 핵연료는 기존 핵연료 소재의 안전성을 향상시키기 위한 핵연료로써 원자로 사고시 중대사고로의 진입을 지연하는 것이 주 목적이다. 사고 저항성 핵연료의 피복관 특성을 간단하고 명확하게 관찰할 수 있는 방법이 단축 인장 시험이다. 사고 조건시 정밀한 변형 해석을 위해서는 정확한 소재 물성 데이터를 요구되기 때문에 0 도 45 도 90 도 방향별 인장 시편을 설계하였으며 이를 시험하기 위한 치구 들을 제작하였다. 피복관의 인장 시편의 경우 다양한 곡면 내의 변형률을 측정해야 하므로 비접촉식 측정 기법 중에 하나인 디지털 이미지 상관 기법(DIC)를 사용하였다. 인장 시험 장치와 DIC 측정 장치가 별도의 장치로 독립적으로 운용되기 때문에 이 두 장치를 연동시킬 시스템을 구축하였다. 구축된 시스템을 검증하기 위하여 기존 피복관 소재인 Zircaloy-4 소재를 이용하여 상온에서 인장 시험을 수행하였다. 이를 통하여 방향별 기계적 물성뿐만 아니라 이방성 계수값을 도출하였다. 향후 개발된 인장 시험 방법을 이용하여 사고 저항성 피복관 소재의 기계적 특성을 분석할 계획이다. Accident-Tolerance Fuel (ATF) is a nuclear fuel to improve the safety of conventional nuclear fuel materials, and its main purpose is to delay entry into a severe accident during a nuclear reactor accident. The uniaxial tensile test is a simple and clear method to observe the characteristics of the cladding tube of ATF. Since accurate material property data is required for precise deformation behavior during accident conditions, tensile specimens for 0°, 45°, and 90° direction were designed, and tensile test fixtures were manufactured to test them. In the case of the clad tube tensile specimen, the DIC technique was used as a method of measuring the strain in various curved surfaces. Since the tension test device and the DIC measuring device operate independently as separate devices, a system that can interface these two devices is constructed. In order to validate the test system, tensile tests under room temperature were performed using the zircaloy-4 material, which is an existing cladding material. Through this test, not only the mechanical properties in each direction, but also the anisotropy coefficient values were derived. It is planned to analyze the mechanical properties of the ATF’s clad using the developed test method.
이성욱(Sung-Uk Lee),서용칠(Yongchil Seo),정승호(Seungho Jung) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
The automation for constructing a building has been extensively studied. Various robots for construction were developed. However, the bolting process is still worked manually. To tighten bolts, human workers climb the vertical steel beam on the top of the high-rise steel structure in many construction fields. This works is extremely dangerous. Therefore, a new bolt tightening mobile manipulator is developed to automate bolting process in this paper. The bolt tightening mobile manipulator composes of four parts: a carrier, a vertical moving part, a bolting position control part and a bolting tool part. We assume that the developed mobile manipulator is attached to the boom which moves around the core of a building. The degree of freedom of the developed manipulator is five to access a bolting position of construction of steel. The carrier moves horizontally under the boom. The vertical moving parts is scissor type. The bolting position control part has 3 degree of freedom - one rotation and two linear motion.
다단식(다단식) 토석류 방호책을 이용한 재해방지 시스템
이성욱(Lee Sung-Uk),최승일(Choi Seung-Il),최우경(Choi Yu-Kyung) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Debris flows are a natural hazard which looks like a combination of flood, land and rock slide. Large rainfall in July 2006 produced several large scale debris flows and many small debris flows that resulted in loss of life and considerable property and railway damage, as was widely reported in the national media. The hazard "debris flow" is still insufficiently researched. Furthermore debris flows are very hard to predict. Flexible Ring net barriers are multi-functional mitigation devices commonly applied to rock fall or floating wood protection in floods, snow avalanches and also mud flows or granular debris flows, if properly dimensioned for the process or processes for which they are intended. Overtopping of the barriers by debris flows and sediment transport is possible, supporting the design concept that a series of barriers may be used to stop volumes of debris larger than are possible using only one barrier. The future for these barrier concepts looks promising because these barriers represent the state of art for such applications and are superior to many other available options.