• 제목/요약/키워드: Space Standards

검색결과 846건 처리시간 0.031초

드레이퍼 방식 연마기에서의 툴 영향 함수 기법 (Deterministic Pitch Tool Polishing Using Tool Influence Function)

  • 이현수;양호순;이윤우;김석환
    • 한국광학회지
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    • 제19권6호
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    • pp.422-428
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    • 2008
  • 본 논문에서는 툴 영향 함수(Tool Influence Function)를 이용한 피치(pitch)툴의 정량적 물질 제거 제어 기법에 대하여 기술하였다. 피치 툴은 뛰어난 표면 거칠기를 생성시키는 반면 툴의 물질 변형이 상대적으로 크고 물질제거가 어렵기 때문에 일반적으로 숙련된 가공 기술자에 의한 정성적 연마 기법으로 간주되었다. 하지만 이러한 피치 툴을 이용한 수치모사 및 실험을 수행한 결과, 정량적 피치 툴 연마 기법이 가능하다는 것을 알 수 있었다. 실험과 수치모사에 의한 물질 제거 형상은 약 79%의 정확도로 일치하였다. 또한 직경 280 mm의 평면가공에 대한 수치모사 단계에서 5번의 모의 가공 후 p-v(peak to valley) $1{\mu}m$의 최초 형상오차를 168 nm까지 낮추는 결과를 얻을 수 있었다.

Radiometric performance characterization for breadboard AMON-RA energy channel instrument for deep space albedo measurement

  • Jung, Kil-Jae;Ryu, Dong-Ok;Ahn, Ki-Beom;Oh, Eun-Song;Lee, Jae-Min;Kim, Yun-Jong;Yu, Jin-Hee;Yi, Hyun-Su;Ham, Sun-Jung;Yoon, Ji-Yeon;Yoon, Ho-Seop;Hong, Jin-Seok;Yang, Ho-Soon;Chon, Byong-Hyok;Hwang, Hae-Sook;Lee, Han-Shin;Kim, Sug-Whan;Lockwood, Mike
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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    • pp.35.2-35.2
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    • 2008
  • The Albedo MONitor and RAdiometer (AMON-RA) instrument system is designed to measure Earth global albedo anomaly over the wavelength range of 0.3um to 4um. The instrument consists of two interconnecting optical subsystems i.e. a visible channel and an energy channel. The energy channel instrument consists of a modified Winston cone, a couple of relay mirrors and a pyro-electric detector. First, we report the integration and alignment process, leading to the prototype bolometer instrument. We then discuss the radiometric performance characterization including laboratory measurement results and the future plan for further incorporation of the bolometer instrument into the prototype AMON-RA instrument.

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화학물질관리법상의 유해화학물질 안전관리 개선방안 연구 : 안전성평가 사례 중심 (Development on the Safety Management System of Hazardous Chemicals under the Chemicals Control Act: Focusing on Safety Assessment System)

  • 유병태;이은별;김종구
    • 한국안전학회지
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    • 제34권3호
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    • pp.96-101
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    • 2019
  • Chemicals Control Act have been strengthened to control more safely hazardous chemicals from 2015. In particular, the standards for the installation and management of handling facilities was enhanced with specific regulations depending on type of the facilities and the hazardous chemicals. However, some standards for handling facilities caused difficulties in implementing the strengthened standards due to various field conditions, such as lack of physical space. The Ministry of Environment is implementing Safety Assessment System (SAS) to solve these problems since 2018. However, many plants have difficulties in preparing alternative methods to pass the safety evaluation. The purpose of this study was to review and analyze the SAS and to suggest alternative measures in terms of management and technical aspects through the case study of hydrochloric acid storage tanks. The following safety solutions were suggested for handling facilities that had insufficient the space and capacity for the retaining wall due to physical space. Firstly, insufficient space was resolved by introducing equipment relocation or demolition, and retaining wall expansion. Secondly, the wall of the surrounding buildings was used as an alternative to the retaining wall with additional chemical resistant treatment. Finally, sensor installation and facility inspection were suggested as ways to improve chemical safety. Therefore, improvement of chemical accident prevention system is required not only in terms of facilities supplementation but also management aspect. The results of this study are expected to be available for similar facilities and will be based on the preparation of additional safety assessment as alternatives measures in the future.

한국 초등학생 인체 및 교육행태 특성을 고려한 단위교실공간의 치수설정 기준에 관한 연구 - 2000년 이후에 개교한 경기지역 2개 학교를 중심으로 - (A Study on the standards for dimension system for unit space of the classroom through the size of the Korean elementary school students and education behaviors - Focused on the elementary school opened in Kyonggi-Do province since 2000 -)

  • 한상원;최상헌
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2006년도 춘계학술발표대회 논문집
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    • pp.229-233
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    • 2006
  • The purpose of this study is to propose the standards for dimension system for unit space of the classroom in elementary school. The curriculum of elementary school has changed. It has been reflected the architectural plan of classroom of the nationwide elementary school. However the Ministry of Education repealed the statue about the facilities of the schools on September in 1997 and the new education curriculum -the 7th curriculum- demands various activities in the classroom. So we need to another size of unit space of the classroom in elementary school because the size of unit space will affect the quality of education. This study represents that the size of unit plan is based on the size of human body, education curriculum, established day, the number limit of classroom and teaching tools. In this study, regression analysis is used to find out a part of the body-size of Korean.

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'최저주거기준'에 관한 국내 선행 연구경향 분석 (A Analysis on the Previous Research Trend of 'Minimum Housing Standard')

  • 현지원;이연숙;안소미
    • 한국실내디자인학회논문집
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    • 제26권4호
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    • pp.3-11
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    • 2017
  • The appropriate area for human's most basic living space is an important factor. Therefore, the 'minimum housing standard' is a very important factor to ensure a minimum quality of living space for human life. In Korea, however, the importance of the 'minimum housing standard' has been neglected for about 20 years. Even in Korea, the 'minimum housing standard' has become an nominal existence. In other countries, studies have long been conducted on the minimum housing standards, but studies have shown that studies on the minimum housing standard are not actively occurring in Korea. The purpose of this study is to diagnose the current status of the 'minimum housing standard' in Korea and to explore the direction of future research. The study included a total of 29 researches commissioned by the Korea Academic Research Institute (KCI). To ensure the objectivity and reliability of the analysis, analyzed year of research, field of research, method of research, contents of research. Through this study, it is possible to grasp the tendency of previous studies on 'minimum housing standard' in Korea and it is meaningful to increase the usability of 'minimum housing standard' in residential planning. It is also expected that future research on 'minimum housing standards' will be able to present the direction of the field to be developed.

장애인을 위한 공공도서관의 공간구성에 관한 연구 - 대구광역시 공공도서관을 중심으로 - (A Study on the Space Composition of the Public Library for the Disabled Persons: With a Special Regard to the Public Libraries in Daegu Metropolitan City)

  • 오동근;윤수진
    • 한국도서관정보학회지
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    • 제40권1호
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    • pp.157-179
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    • 2009
  • 이 연구는 장애인의 정보격차를 해소하기 위해 비장애인과 동등하게 시설을 이용할 수 있도록 계획수립의 기초자료를 제공하기 위해 시도되었다. 이를 위해 장애인시설 관련법규와 선행연구를 살펴보고, 공공도서관의 시설을 고유영역, 편의시설영역, 동선체계로 구분하여 각각의 기준을 제안하였다. 이를 바탕으로 대구광역시 공공도서관 중 장애인실을 설치하고 있는 5곳을 대상으로 장애인을 위한 공간구성의 현황을 분석하였다. 그 결과 장애인 관련공간의 배치가 미흡할 뿐 아니라 전반적인 편의시설 등이 부족하다는 사실을 확인할 수 있었다.

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Development Plan for the GMT Fast-steering Secondary Mirror

  • Lee, Sugnho;Han, Jeong-Yeol;Park, Chan;Jeong, Ueejeong;Yoon, Yang-noh;Song, Je Heon;Moon, Bongkon;Park, Byeong-Gon;Cho, Myung K.;Dribusch, Christoph;Park, Won Hyun;Jun, Youra;Yang, Ho-Soon;Moon, Il-Kwon;Oh, Chang Jin;Kim, Ho-Sang;Lee, Kyoung-Don;Bernier, Robert;Gardner, Paul;Alongi, Chris;Rakich, Andrew;Dettmann, Lee;Rosenthal, Wylie
    • 천문학회보
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    • 제41권2호
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    • pp.66.3-67
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    • 2016
  • The Giant Magellan Telescope (GMT) will feature two interchangeable Gregorian secondary mirrors, an adaptive secondary mirror (ASM) and a fast-steering secondary mirror (FSM). The FSM has an effective diameter of 3.2 m and built as seven 1.1 m diameter circular segments, which are conjugated 1:1 to the seven 8.4m segments of the primary. Each FSM segment contains a tip-tilt capability for fine co-alignment of the telescope subapertures and fast guiding to attenuate telescope wind shake and mount control jitter. This tip-tilt capability thus enhances performance of the telescope in the seeing limited observation mode. As the first stage of the FSM development, KASI conducted a Phase 0 study to develop a program plan detailing the design and manufacturing process for the seven FSM segments. The GMTO-KASI team matured this plan via an internal review in May 2016 and the revised plan was further assessed by an external review in June 2016. In this poster, we present the technical aspects of the FSM development plan.

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병원급식에 일반위생관리기준과 HACCP 제도 적용을 위한 시설모델 개발 (Development of a Hospital Foodservice Facility Plan and Model based on General Sanitation Standards and RACCP Guidelines)

  • 이정숙;곽동경;강영재
    • 한국식품조리과학회지
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    • 제19권4호
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    • pp.477-492
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    • 2003
  • The purposes of the study were to establish HACCP-based standards and guidelines for conducting a plan review to build, or renovate, hospital food service establishments, and ensure the safety of foodservice and reduce the risk of food borne illness. The scope of the study included suggestion for the planning of hospital foodservice facilities: layout, design, equipment and modeling. The results of this study can be summarized as follows: 1) The development of a foodservice facility plan based on the results of a survey, literature reviews and the results of interviews with foodservice managers from 9 general hospitals. This was composed of operational policies in foodservices, layout characteristics, space allocation, selection, design, specification standards for equipment and the construction principles of foodservice facilities. 2) Two foodservice facility models were developed, one for general hospitals with 900 beds (2,000 patients and 2,500 employee meals per day) and the other for general hospitals with 300 beds (600 patients and 650 employees meals per day). 3) The suggested kitchen space requirements for the foodservice facility models were 341.2 ㎡ (W 17,100mm x L 23,700mm) and 998.8㎡ (W 35,600mm x L 32,800mm) for the 300 and 900 beds hospitals, respectively, with both designs being rectangular. The space requirements for the equipment, in relation to the total operational area, in terms of ratios were 1:3.5 and 1:3.8 for the 300 and 900 beds hospitals, respectively. The recommended space allowances per bed for the developed foodservice facility models were 1.15 ㎡ and 1.11 ㎡ for the 300 and 900 beds hospitals, respectively, which were increased by more than 30% compared to those suggested in the precedent study, and considered appropriate for the implementation of the HACCP system. 4) The hospital foodservice facilities plans and models were developed based on the general sanitation standards, guidelines and the HACCP system, and included foodservice facility layout, product flow, physical separation between contaminated and sanitary areas, foodservice facility specifications with a 1/300 scale for a 300 bed, and a 1/400 scale for a 900 beds blueprint. 5) The main features of the developed foodservice facility plans and models were; physical separation between contaminated and sanitary areas to prevent cross contamination, product flow in one direction from the arrival of the raw material to the finished product, and separation of different work areas and the process of receiving & preparation of products, refrigeration & storage, cooking, assembly, cleaning & disinfection, employee areas and janitorial facilities. The proposed models from this study were presented as examples for those wanting to build, or renovate, their facility for the production of foods.

아트리움 공간에 있어서 화재온도성상에 관한 이론해석 (The Analytical Study of Fire Properties in Atrium Space)

  • 김화중;이지희;최금란;김경례
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1993년도 가을 학술발표회논문집
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    • pp.113-119
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    • 1993
  • Atrium being on fire, the flame is spread vertically, the methods of fire protection and the standards of security are different respectively. Therefore, in the case of atrium, it has many problems on the fire protection and the application of statute according to the space properties. So it is important to analysis, atrium being on fire, fire properties to space properties. From these points of view, the purpose of this study is to analysis the fire properties of atrium .

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TEM 관련 이론해설 (5): 원자집합체의 산란 (Scattering from Assemblies of Atoms)

  • 이확주
    • Applied Microscopy
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    • 제34권4호
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    • pp.211-221
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    • 2004
  • 물질을 이루고 있는 원자의 집합체에서 단 한번의 회절이 일어나는 경우의 회절이론의 개발을 소개하였다. Fourier transform으로 이루어지는 역 격자 공간에서의 역격자 공간 분포와 실 공간에서의 패터슨 함수와의 관계를 유도하고 이어 여러 가지 물질을 예로 들어 고찰하였다.