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2015 개정 교육과정 중학교 기술⋅가정 교과서의 건설기술 관련 단원에 대한 내용학적 분석
유현석 학습자중심교과교육학회 2024 학습자중심교과교육연구 Vol.24 No.1
Objectives The purpose of this study is to prevent the same writing errors in the future by analyzing problems in the description of the construction technology section of the 2015 revised curriculum technology and home economics textbook from a content perspective and suggesting appropriate alternatives. Methods In this study, an analysis framework was constructed based on the achievement standards of the 2015 revised curriculum and the content system of technology and home economics textbooks. In addition, this study reviewed the content validity and presented alternatives in five areas: the concept and characteristics of construction technology, the production process of construction structures, the construction technology system, the development process of construction technology, and future construction technology. Results In this study, civil engineering technology is a concept that encompasses the concepts of social overhead capital, natural power, energy utilization, and sustainability, and the characteristics of construction technology are sole production, immobility, complexity, costliness, and publicness. Most descriptions of the production process of construction structures focused on architectural structures, and there appeared to be no textbooks explaining the differences between architectural structures and civil structures at the planning and design stage. The development process of construction technology was mostly divided into four stages, and many inappropriate cases were found in the period classification of buildings, descriptions of styles, structures, and example buildings. Conclusions The construction technology section of current technology and home economics textbooks contains many problems and errors from a content perspective. These problems and errors can be fully reviewed and corrected by content experts. It is expected that the same problems can be improved in new textbooks through this study.
Titanium plasma sprayed implant에 관한 여러가지 기계적 표면처리방법이 implant표면조도에 미치는 영향
유현석,박재완,서조영,Yu, Hyeon-Seok,Park, Jae-Wan,Suh, Jo-Young 대한치주과학회 1993 Journal of Periodontal & Implant Science Vol.23 No.3
실패한 임프란트를 구강내에 유지하기 위하여는 임프란트 매식체의 표면을 처치하여 세균독소를 제거하구 주위의 연, 경조직에 적합한 표면 구조를 만들어 주어야 한다. 이에 본 연구에서는 임프란트 매식체 표면을 high speed diamond bur, low speed diamond bur, stone, rubber point, Jetpolisher로 처치하여 가장 평활한 표면을 만들 수 있는 방법을 알아 보았다. 조도측정기를 이용하여 표면의 최대높이값을 측정한 결과 high speed diamond bur, rubber point, Jetpolisher를 사용한 시편의 최대높이값의 평균은 $7.77{\mu}m$였고, low speed diamond bur, rubber point, Jetpolisher를 사용한 경우에는 $8.44{\mu}m$를 보였다. Stone, rubber point, Jetpolisher를 사용한 경우 $6.24{\mu}m$로 가장 평활한 표면을 보였다. 이러한 수치들은 제거하지 않은 TPS(titanium plasma sprayed)면의 $24.43{\mu}m$에 비하여는 낮은 수치를 보였다. 주사전자현미경으로 관찰 하였을 때 high speed diamond bur, rubber point, Jetpolisher를 사용한 군에서는 TPS 입자들이 부분적으로 남아있었으나 이 입자들은 그 높이가 원래의 TPS에 비하여는 상당히 감소되어 있었다. Low speed diamond bur, rubber point, Jetpolisher를 사용한 시편에서는 전 표면에 걸쳐 TPS가 남아있는 거친 표면 구조를 보였다. Stone, rubber point, Jetpolisher를 사용한 시편은 대부분의 TPS가 제거되어 titanium이 노출되어 있었고, titanium 금속에 stone에 의한 흠들이 보였으나 일부분에서는 TPS가 남아있어 제조회사에서 만들어진 평활한 표면에 비해서는 거친 양상을 보였다. For maintenance of an ailing or failed implant it is essential to treat the implant fixture surface so as to remove bacterial endotoxin and make a surface tolerated by surrounding soft and hard tissue. Thus in this study the method that makes the smoothest surface treated with a high speed diamond bur, a low speed diamond bur, a stone, a rubber point or Jetpolisher was studied. With the profilomenter a mean value of $R_{max}$ was measured. The hight speed diamond, the rubber point and the Jetpolisher showed a mean $R_{max}\;7.77{\mu}m$. The low speed diamond bur, the rubber, point and the Jetolisher made a mean value of $R_{max}\;8.44{\mu}m$. The stone, the rubber point and the Jetolisher showed the smoothest surfaces with a mean value of $R_{max}\;6.24{\mu}m$. TPS (titanium plasma sprayed) areas showed a mean vlaue of $R_{max}\;24.42{\mu}m$, and the smooth surfaced titanium disc manufactured by the company (IMZ, Germany) shows a mean value of $R_{max}\;3.00{\mu}m$. Under the SEM examination the disc treated with a high speed diamond bur, a rubber point and a Jetpolisher showed partially remaining TPS particles, but the height of these particles were reduced remarkably compared with those of the original TPS. The disc treated with a low speed diamond bur, a rubber point and a Jetpolisher showed a rough topography with remaining TPS on the entire surface. A stone, a rubber point and a Jetpolisher removed almost TPS and the bulk titanium metal was exposed and some scratches were made by the stone. All treated discs were revealed as rougher than the smooth surface disc manufactured by the company. An untreated TPS disc shows a very irregular surface and a $40{\mu}m$ height of the plasma sprayed areas.
인터액티브 다큐멘터리의 형식과 구조에 관한 연구: World Press Photo 재단의 인터액티브 스토리텔링 수상작을 중심으로(2014-2021)
유현석 한국커뮤니케이션학회 2022 커뮤니케이션학연구 Vol.30 No.3
The intention of this article is to explore various modes and structures of interactive documentary. As a new emerging field of study, the categorizations and definitions of interactive documentary has somewhat vague. This article examines 31 interactive storytelling contents of the World Press Photo(WPP) Foundation contests between 2014-2021, in terms of storytelling structures and their contents. Through this, the identifies three modes of interactive documentary: hypertext, participatory and VR contents, and further discusses how we understand the field of interactive contents in general, interactive documentary in particular.
굴삭 자동화를 위한 레이저 스캐너 기반의 3차원 객체 탐지 알고리즘의 개발
유현석,박지운,최윤녕,김영석,Yoo, Hyun-Seok,Park, Ji-Woon,Choi, Youn-Nyung,Kim, Young-Suk 한국건설관리학회 2011 한국건설관리학회 논문집 Vol.12 No.6
2006년부터 한국에서 개발중인 지능형 굴삭 시스템(IES)은 이동, 굴삭, 상차를 포함하는 굴삭 작업 일련의 과정을 전자동으로 실현하기 위한 프로젝트로서, 굴삭 로봇 주변 지형의 3차원 모델링과 상차트럭의 위치, 사람의 접근, 이동경로상의 장애물 등의 객체를 정확하게 탐지하는 기술은 굴삭 자동화 장비의 작업 품질과 안전성 확보 측면에서 필수적으로 요구되는 핵심 요소 기술이라 할 수 있다. 이 연구의 목적은 레이저 스캐닝 시스템을 이용하여 지능형 굴삭 로봇 주변의 지형과 객체를 3차원으로 탐지함으로써 자동화 굴삭 작업의 품질과 안전성을 확보하는 데 있다. 본 연구에서는 굴삭기 주변의 3차원 지형으로부터 객체의 위치, 높이, 너비, 형상 정보를 추출하는 알고리즘을 제안하였으며, 실제 토공현장을 대상으로 한 실험을 통하여 알고리즘의 성능을 검증하였다. The intelligent excavating system(IES), the development in South Korea of which has been underway since 2006, aims for the full-scale automation of the excavation process that includes a series of tasks such as movement, excavation and loading. The core elements to ensure the quality and safety of the automated excavation equipment include 3D modeling of terrain that surrounds the excavating robot and the technology for detecting objects accurately(i.e., for detecting the location of nearby loading trucks and humans as well as of obstacles positioned on the movement paths). Therefore the purpose of this research is to ensure the quality and safety of automated excavation detecting the objects surrounding the excavating robot via a 3D laser scanning system. In this paper, an algorithm for estimating the location, height, width, and shape of objects in the 3D-realized terrain that surrounds the location of the excavator was proposed. The performance of the algorithm was verified via tests in an actual earthwork field.