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신동윤,Shin, Dong-Youn 대한기계학회 2017 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.5 No.1
액상의 전자재료를 인쇄라는 저비용 패턴방식을 이용하여 전자 혹은 디스플레이 부품 및 제품을 대량 생산하는 것을 인쇄전자라고 하며, 2007 년을 전후하여 국내에서도 본격적으로 저비용 전자 및 디스플레이 부품 및 제품을 제조하기 위한 소재, 공정 및 장비에 대한 연구가 시작되었다. 본 연구에서는 수~수십 마이크로미터급의 해상도를 가지는 전자 혹은 디스플레이 부품 및 제품을 생산할 수 있는 초정밀 인쇄전자 장비들에 대해 소개하도록 한다. Printed Electronics is a relatively new subject where electronics and display appliances are mass-produced by employing low-cost printing techniques with electronic materials suspended in a liquid medium, and many efforts to develop materials, process and equipment to commercialize low-cost electronics and display parts have been made since 2007 in the Republic of Korea. In this work, the development status of printing equipment for printed electronics and display components in the size of a few micrometers and tens of micrometers is briefly introduced.
잉크액적 토출불량 검출을 위한 고속 잉크젯 모니터링 모듈
신동윤(Dong-Youn Shin) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.10
잉크젯 프린팅이 전자 및 디스플레이 산업의 생산라인에 적용됨에 따라, 생산효율을 극대화하기 위해 잉크액적 토출불량 검사 소요시간의 단축이 요구되고 있다. 기존의 잉크액적 토출불량 검사방법은 주로 고배율 렌즈와 CCD 카메라를 직선운동을 하는 스테이지 상에 설치하여 잉크젯 프린트 헤드의 노즐배열과 평행한 방향으로 순차적으로 이동시키면서 토출되는 잉크액적을 비젼검사하는 것이었다. 그러나, 기존 방식은 60 초 혹은 그 이상의 검사시간을 요구하며, 특히 잉크액적 토출불량을 장시간 지속적으로 검사하는 것은 불필요한 기계적 진동을 야기시키는 문제점이 있었다. 본 연구에서는 회전미러 방식의 고속 잉크젯 모니터링 모듈을 설계하여 검사시간을 18 초 내외로 단축하였으며, 검사 소요시간 단축을 위한 모듈의 설계 고려사항들에 대해 논의하도록 한다. Since inkjet printing is being employed in production lines of electronics and display industries, the tack time for inspection of jetting failure has become very important because the throughput of the inkjet printing system can be extended to the maximum limit by adopting a shorter jetting inspection time. The most popular method for inspecting jetting failure involves the use of a linear stage, a high magnification lens, and a charge coupled devicecamera. However, this conventional approach requires approximately 60 s to complete the jetting inspection and might not be suitable for a high-speed reciprocating jetting inspection in endurance tests due to the unwanted mechanical vibration. In this study, a novel concept of an inkjet monitoring module is introduced, which has an overall inspection time of 18 s. For the shorter tack time of jetting inspection, the parameters affecting the tack time are discussed in this paper.
탐색적 데이터 분석 방법을 활용한 머신러닝 기반 재실인원 추정 모델
신동윤(Shin, Dong Youn) 대한건축학회 2024 대한건축학회논문집 Vol.40 No.3
Employing machine learning, this study detected occupancy anomalies in Seouls public rental housing by analyzing energy usage data spanning from 2016 to 2021. Through the examination of electricity consumption patterns, the model successfully pinpointed instances of underreported or illegal occupancy, identifying approximately 8% of households as anomalies. This approach highlights the promise of data-driven methodologies in public housing management, promoting adherence to regulations and equitable resource allocation. Visualization of results using GIS further facilitates their practical utilization by housing authorities.
3차원 잉크젯 쾌속 조형법을 위한 세라믹 상변화 잉크의 음속측정
신동윤(Shin, Dong-Youn) 한국산학기술학회 2008 한국산학기술학회논문지 Vol.9 No.4
3차원 쾌속 조형법은 컴퓨터에 저장되어있는 객체 데이터를 이용하여 시제품을 제작하는 기술로써, 기존의 나무나 클레이, 혹은 주조 제작방식과는 달리 원하는 위치에 요구되는 재료를 직접 적층함으로써 원형제품을 제작함을 특정으로 한다. 스테레오리쏘그래피, 용융 점착법, 선택적 레이저 소결법, 판상 제작법 등의 다양한 3차원 쾌속 조형법이 개발되었으나, 그 중에서 잉크젯을 통한 3차원 쾌속 조형법은 잉크화된 조형재료를 통해 구조적으로 기능이 가능한 원형제품의 제작이 가능하다는 특정이 있다. 그러나, 기능성 원형제품의 제작을 위해서는 잉크의 고농도화가 요구되며, 이로 인해 잉크 점도가 상승되어 젯팅 신뢰성이 저하되는 문제점이 있었다. 본 논문에서는 3차원 쾌속 조형법을 위한 최적 젯팅조건을 도출하기 위해 슬러리 타입 세라믹 상변화 잉크의 음파 전달속도 측정과 음파 전달속도가 젯팅에 미치는 영향을 고찰하도록 한다. 3D rapid prototyping is the manufacturing technology to fabricate a prototype with the data stored in a computer, which differs from conventional casting technology in terms of an additive process. Various 3D rapid prototyping techniques such as stereolithograpy, fused deposition modeling, selective laser sintering, laminated object manufacturing have been developed but among them, 3D inkjet printing has a unique featurethat materials could be jetted to directly form the body of a prototype, which could be a finished product functionally and structurally. However, this needs ink with a high solid content, which tends to increase the dynamic viscosity of ink. The increase of ink viscositytends to restrict the jettable range of ink and hence the jetting conditions should be optimized. The intrinsic speed of sound in a hot melt ink with ceramic nanoparticles dispersed is one of key components to determine the jettable range of ink. In this paper, the way to measure the intrinsic speed of sound in a hot melt ceramic ink is proposed and its influence on the jetting condition is discussed.
신동윤(Dong-Youn Shin),김동수(Dong-Soo Kim),김충환(Chung-Hwan Kim),이택민(Taik-Min Lee),최병오(Byung-Oh Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Inkjet printing technology, especially based on a piezo Drop-On-Demand(DOD) inkjet print head, has been recognized as one of versatile and low cost manufacturing tools and hence numerous R&D activities have been performed to transfer it to production lines in many industrial fields. Although it has been employed to day-to-use desktop inkjet printers for many years, the influence of driving conditions, especially its driving voltage waveform, has not been fully understood because of the inherent nature of complex multi physics in a piezo DOD inkjet print head. This complex nature of a piezo DOD inkjet print head has led researchers and developers to implement computationally expensive numerical methods. In this study, a fully mathematical model for a cylindrical type piezo DOD inkjet print head is proposed and its analytic results are compared to experimental results. Finally, the possible causes of errors and the advantage of the proposed mathematical model are discussed.
CAAD 교육에 있어서 디지털 체인 패러다임의 수용방법론에 관한 연구
신동윤(Shin Dong-Youn),김성아(Kim Sung-Ah) 대한건축학회 2007 대한건축학회논문집 Vol.23 No.11
This study starts from a critical thinking that the meaning of digital chain may or should be redefined in order for the research in computer aided architectural design(CAAD) to situate itself within the realm of education for architecture. The meaning of digital fabrication has confused with the characteristics of the model manufacture only in a sense. Thus, we criticize the nature of digital fabrication revealed in digital chain for design education, then move to its definitions, and finally suggest a framework of education in CAAD. We analyze the example, course of ETH CAAD lab, and finally formulate the ideal and actual mythology of expansive digital chain curriculum for education. In order to the digital chain to become a new paradigm of CAAD education, we propose the optimized process for the digital chain. The means optimized is that it has high degree of freedom of design procedure in boundary digital chain accordingly it induces expansive and creative design issue for constant evolution.