불공정한 법률행위

박철우 한국사법행정학회 1978 사법행정 Vol.19 No.3

A Study on Fabrication of Nickel Fine Pitch Probe Needle with Electroforming Process

박철우,박경용,박영수 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

In this study, FEM (Finite Element Method) and experiments were performed to obtain the optimal condition for the electroformingprocess used to fabricate a multi-layered and high aspect ratio micro-structure. Especially, the influence of current density andelectrolyte concentration on a cantilever type LCD probe needle was investigated. It was found that the current density is proportionalto the thickness of the deposited metal. A finer metal structure and compact surface of the LCD pin was formed by the electroformingprocess than by the etching process. The experiment results show that structures maintain good fidelity. Ion discharge occurred slowlyat low current densities, which made the deposited crystal bigger and coarser. On the other hand, high current densities made thecrystal of the deposited structure finer and atom generating rate higher.

Energy Consumption Reduction Technology in Manufacturing – A Selective Review of Policies, Standards, and Research

박철우,권계시,김욱배,민병권,박성준,성인하,윤영식,이경수,이종항,석종원 한국정밀공학회 2009 International Journal of Precision Engineering and Vol.10 No.5

Research on the improvement of efficiency in the manufacturing industry is underdeveloped partly because of the ambiguous objectives of the technical development of efficiencies in terms of energy consumption reduction. Consequently, the technical development of high-efficiency techniques that consider the whole manufacturing system is rarely addressed in industrial research. For this reason, this report aims to find the patterns in, and the definitions of, the technologies that will lead to efficiency improvement in the entire manufacturing industry by thoroughly investigating the literature about energy consumption reduction strategies, energy policies, and the state-of-the-art for energy-saving methods that are being pursued currently in several major countries. Through this study, the necessity and importance of the foregoing three items have been identified, and a way of defining the productivities of an energy-saving manufacturing system distinct from those of conventional manufacturing systems was attempted. It is also shown that the development of energy-saving and energy-harvesting technologies for all industrial sectors has emerged as a herald of economic growth in the near future.

Single-Photon Counting in the 1550-nm Wavelength Region for Quantum Cryptography

박철우,문성욱,배병성,신현준,박준범,한상국,이승훈,박영수 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1

In this paper, we report the measured performance of an InGaAs avalanche photodiode (APD) Module fabricated for single-photon counting. We measured the dark current noise, the after-pulse noise, and the quantum efficiency of the single- photon detector for different temperatures. We then examined our single-photon source and detection system by measuring the coincident probability. From our measurement, we observed that the after-pulse effect of the APD at temperatures below 105 C caused cascade noise build-up on the succeeding electrical signals.

A Study on the Manufacturing of Digital Camera Barrel using Magnesium Alloy

박철우,김영호 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.

In recent year, there has been a growth of the manufacture and application of magnesium products. For Magnesium alloys take advantage small specific gravity and relatively high strength, shielding electromagnetic waves. However, there are so many studies to assure good formability because Magnesium alloy is difficult to form. The AZ31B alloy shows an excellent workability at temperatures from 250℃ to 400℃. Temperatures higher than 400℃ are not suitable for forming of the AZ31B alloy because of heavy oxidation. Forming temperature and heat transfer of Magnesium alloy to the molds, punch velocity, friction coefficient and geometric shape of molds are important factors to forge the components successfully. The forming factors of press forging on AZ31B have been studied by finite element analysis that was done with DEFORM/3D software. By conducting a circular design which included predictive experiments, evaluation of the outcome of actual products, and process modifications, the optimum conditions were established for a forging process to manufacture a magnesium alloy camera barrel.

Effects of high SiO2 coal ash and silica fume on the strength, permeability and leachate of a very early strength cementitious composite

박철우,김경남 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.5

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최문순 강원도지사에게 듣는다

박철우 대한토목학회 2013 대한토목학회지 Vol.61 No.9

디자인적 사고특성이 창의적 종합설계 학습성과에 미치는 영향연구: 부산지역 대학생 중심으로

박철우 한국창업학회 2019 한국창업학회지 Vol.14 No.6

The purpose of this research is, to think outside the box, solve problems and produce an inventive output, it is essential to have the ability to correlate and integrate the knowledge of various disciplines, as expertise from one field is not enough to do so. Empathy, integrative thinking, optimism, experimentalism, and cooperation were defined as variables to verify the effect of the characteristics of design thinking on the learning outcomes of Capstone Design. Innovativeness was expended as an intermediary cause of Capstone Design learning outcome and empirical analysis was conducted from precedent researches and deduction from analysis subject to university students of Busan district. Among the characteristics of design thinking, integrative thinking, experimentalism, and cooperation appeared to be important factors for innovativeness. Integrative thinking has been proved to have a significant influence on innovativeness and innovativeness has been determined to be a crucial aspect in the achievement of Capstone Design learning outcome. It is concluded that university students of Busan district will make rapid changes and opportunities via empathy, experimentation and cooperation and also have a positive influence on the pursuit of new design thinking through Capstone Design study, and hence contribute to innovativeness, and achieving better results than precedent systems or technologies. 본 연구의 목적은 기존의 상식, 통념을 깨고 창의적인 산출물을 산출하기 위해서는 어느 한 분야의 전문 지식과 기술만으로는 부족하기에 다양한 여러 학문을 복합적으로 연결하고 통합시켜 사고하며 문제를 해결할 수 있는 능력이 필요함을 보여주는 것이다. 디자인적 사고 특성이 창의적 종합설계 학습 성과에 미치는 영향 요인을 검증하기 위해 공감, 통합적 사고, 낙관주의, 실험주의, 협업을 그 범주로 정의하였다. 혁신 지향성을 창의적 종합설계 학습 성과의 매개 요인으로 확장하였으며, 선행연구 고찰과 분석 요인을 도출하여 부산지역 대학생을 대상으로 실증 분석하였다. 디자인적 사고 특성 중 통합적 사고와 실험주의 그리고 협업은 혁신지향성에 중요한 요인으로 나타났다. 통합적 사고는 혁신지향성에 큰 영향을 주는 것으로 검증되었으며, 혁신 지향성은 창의적 종합설계 학습 성과에 매우 중요한 요인으로 나타났다. 부산지역 대학생들이 공감과 실험, 그리고 협업으로 급속한 변화를 기회로 만들고 창의적 종합 설계 학습을 통해 새로운 디자인적 사고특성 추구에 긍정적인 영향을 미칠 것이며 기존의 체계나 기술보다 더 좋은 결과를 찾는 성향으로 혁신 지향성에 이바지할 것으로 판단된다.

소형 고정익 무인비행기의 돌풍 조건에서의 에너지 기반 비행 경로각 생성 알고리듬

박철우,김유단 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4

소형 고정익 무인기의 임무수행에 있어서 에너지 문제는 매우 중요한 주제이다. 본 논문에서는 무인기가 임무수행 시간 및 임무반경이 중요한 경우에는 에너지를 고려한 유도 및 제어 기법을 제안하였다. 대기중의 돌풍(gust wind) 조건에서 기체의 비행경로각을 제어하여 기체의 역학적 에너지를 높일 수 있는 유도 명령을 생성한다. 이는 기존에 제안되었던 에너지 획득 방식인 열기류에 의한 상승 온난 기류를 이용한 방식이나 바람 전단조건에서 비행경로각을 제어하는 방식과는 차별화된 방식이다. 3 자유도 질점 글라이더 모델로부터 에너지 획득 관계식을 유도한 뒤, 미리 측정된 바람정보를 이용한 시뮬레이션을 통해 실제 기체가 역학적 에너지를 얻을 수 있음을 보였다. An energy problem is a important problem for small UAV(Unmanned Aerial Vehicle). Energy-based guidance and control method should be implemented in UAV for a mission that mission duration and mission range are critical. In this paper, mechanical energy based flight path control algorithm using gust wind is proposed. This algorithm is different from the energy-based guidance using thermal or wind shear. Using 3DOF glider model, an energy harvesting equation is formulated and an energy harvesting simulation is performed using pre-measured real wind data. It is shown from the simulation result that energy harvesting is possible by flight path control under gust wind condition.

미래 산업변화 수용을 위한 국가직무능력표준체제 연구

박철우 한국직업자격학회 2020 직업과 자격 연구 Vol.9 No.2