• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.10a
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• pp.607-612
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• 1993

원심분리기는 용액 속에 있는 물질을 크기와 밀도 및 모양의 다름을 이용하여 용액으로부터 분리, 정제 및 순화하는 과학기계이며 처리량의 규모에 따라 공업용과 실험실용으로 분류된다. 공업용은 처리량이 많은 반면 실험실용은 처리량이 적으나 분리효과가 좋은 특징을 갖으며 회전속도에 의해 저속, 고속 및 초고속의 원심분리기로 나뉘어진다. 초고속 원심분리기는 최초(30년대)에 침전계수의 측정을 목적으로 연구개발을 시작하였다. 이의 용도에서 사용되는 초고속원심기를 분석용 초고속원심기라 부르나 이는 50년대 이후에 점차적으로 기술적 발전을 가져와 미소물질 분리를 위한 분리용 초고속원심기로 변천이 되어 생물학분야 이외에 항공기,선박,고속철도,석유탐지,원자력,섬유공업과 반도체등 여러 분야에 이용이 되고 있다.

• The Magazine of the IEIE
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• v.25 no.2
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• pp.48-57
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• 1998

본 기고는 시뮬레이션 기술 분류 중 Virtual Simulation, 그 중에서도 항공기 시뮬레이터 기술에 초점을 맞추고자 한다. 항공기 시뮬레이터 기술이 시뮬레이션 전체 분야에서 차지하는 비중과 현재의 위를 객관적으로 이해하기 위하여 시뮬레이션 기술이란 무엇인가 하는 원론에서부터 출발한다. Virtual, Constuctive, Live 등의 시뮬레이션 기술들을 간략히 소개하면 이들 기술의 변천을 SIMNET(SIMulator NETworking), DIS(Distributed Interative Simulation), ALSP(Aggregate Level Simulation Protocol), HLA(High Level Architecture) 등의 프로그램 등을 통하여 살펴본다. 항공기 시뮬레이터 기술은 Virtual 시뮬레이션 기술의 발원으로서 1930년대 이후로 시뮬레이션 기술 전반을 선도하여 왔는데, 그 진화과정을 간추려 언급한다. 또한, 항공기 시뮬레이터를 구현하기 위한 기술들을 간략히 살펴보고, 그 기술들을 선도하는 네덜란드 Delft 대학의 SIMONA(SImulation, MOtion and NAvigation) 프로그램과 미국 국방성, 산업체, 학계, 연구소 등을 중심 축으로 하는 NCS(National Center for Simulation)를 소개함으로써 항공기 시뮬레이터는 물론, 시뮬레이션 기술 전반의 미래를 가늠한다. 마지막으로 항공기 시뮬레이터를 중심으로 하는 국내 시뮬레이터 기술 수준과 산업 현황을 간추려 소개한다.

• Proceedings of the SOHE Conference
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• 2003.10a
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• pp.77-77
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• 2003

본 연구의 목적은 후프(hoop)의 기원 및 변천과정을 고찰해보고 시대별로 후프의 유형을 분류한 후, 포스트모더니즘 이후 더욱 다양해진 후프가 현대패션에서 어떻게 응용되고 있는지를 살펴봄으로써 후프의 역사적ㆍ미적 가치를 재인식하여 오늘날 복식디자인에 창조의 영감을 줄 수 있는 하나의 모티브를 제시하는데 있다. 후프가 발생하였던 르네상스시대에는 신 중심에서 인간중심으로 사고가 변화하면서, 복식에 있어서도 인간의 신체미를 과시하려는 의도로 인체의 실루엣을 과장ㆍ확대하고자 하였다. 따라서 속옷의 중요성과 역할에 따른 심미적인 기능이 복식에 절대적으로 필요하였고, 뿐만 아니라 기교적인 면에서 속옷에 요구되는 장식성은 어느 시대보다 절실하였다. 그 결과 겉옷이 확대되고, 이에 따라 속옷도 인체를 크게 보일 수 있는 후프가 고안되었다. 후프는 스커트를 부풀리기 위해 철사나 고래뼈 등을 세공하여 만든 테를 넣은 속치마를 말한다. 16세기 중엽 스페인에서 유행한 종형의 파딩게일(farthingale)을 시초로, 영국과 프랑스에서는 드럼형의 휠 파딩게일(wheel farthingale)과 오쓰뀌(hausse col)가 유행하였다. 17세기 초기에는 후프를 착용한 16세기 복식이 유행하였으나, 1625년 이후 슬림한 스타일의 17세기 복식이 유행하자 후프의 착용은 점차 쇠퇴하였다. 18세기에는 파니에(panier)가 유행하여 옆을 부풀린 스커트의 실루엣을 형성하였고, 19세기에는 크리놀린(crinoline), 벗슬(bustle)이 유행하였다.

• The Korean Journal of Zoology
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• v.24 no.2
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• pp.117-121
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• 1981

우리나라 현실을 알기 위해서는 分類學의 歷史的 背景을 살필 필요가 있다. 그 역사를 Darwin 以前과 Darwin 以後로 크게 區分할 수 있다. Darwin 이전의 대표자로서 그리이스의 Aristoteles와 18세기의 Linne를 들 수 있는데 Linne는 種名의 二名法의 확립과 카테고리의 설정으로써 分類學의 發展에 크게 공헌하였고, 그의 哲學的 背景은 Aristoteles의 사상과 통하는 스콜라 哲學이었다. 그의 種의 槪念은 靜的인 것이었고, 그는 少數의 識別形質만을 重要視하였다. Darwin 이후에는 進化思想이 分類學에 절대적인 영향을 주어 학자들은 動物의 系統探求에 熱을 올리게 되었고, 種의 개념은 動的인 경우로 되었다. 또한 Linne 이후에는 動物의 新種記載가 급증하였다. 20세기에 들어와서는 自然系統分類學 生物學的 系統分類學, 數理分類學 (numerical taxonomy, 二次大戰 이후), 生化學的 技術의 도입 등 分類學에 새로운 면이 첨가되면서 種의 개념을 변천하고 種의 定義는 多樣化하였으며, 分類學上의 形質과 系統發生 究明方法이 확장되었다.

• Journal of Korean Society of Forest Science
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• v.98 no.6
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• pp.659-668
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• 2009

Time series data on forest resources and population over the period from 1927 to 2007 were constructed and analyzed in order to identify trends and characteristics of forest transition in Korea. Korean forest transition could be classified into three phases in terms of the average annual growing stock of forest; forest degradation period (1927-1952), forest stagnation period (1953-1972) and forest growth period (1973-2007). Over the past 80 years forest area decreased 0.05% each year. The decreasing rate was very low, especially considering rapid economic growth and increased population of Korea with over 60% of forest cover. Growing stock per hectare significantly increased from $5.6m^3$ in 1952 to $97.8m^3$ in 2007, or 17.5 times during 1952 to 2007. Despise of increasing population and rapid economic growth, in particular, growing stock per capita has increased from $1.7m^3$ in 1952 to $12.9m^3$ in 2005 and un-stocked forest area decreased from 3,315 thousand ha to 165 thousand ha during the same period. In this regard, Korea represents a case of modern forest growth. Among 56 countries with more than 10 million of population and 10% or more of forest cover over the period 1990 to 2005, Korea is classified as a country which has high forest cover but low deforestation rate. Also, Korea is the only developing country which has 50% or more of forest cover and shows a below average deforestation rate.

• Journal of Korean Library and Information Science Society
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• v.34 no.3
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• pp.125-145
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• 2003

The core version of UDC(Universal Decimal Classification) is available in an electronic form called MRF(Master Reference File) which supports the maintenance of the quality of the scheme as a working tool for the UDCC(UDC Consortium) by annual reviewing its content and initiating revisions and extensions. In this paper, we discuss outcomes of our in-depth analysis of the geography, biography and history disciplines in UDC focused on the its evolutions and characteristics, including the common auxiliaries of place, the common auxiliaries of time and the common auxiliaries of race, ethnic grouping and nationality. Based on the in-depth analysis, we suggested some ideas which can be applied into the history class of KDC(Korean Decimal Classification). In particular, its principle of combination methods in the history of individual regions, the way of its assignment of physical geography and human geography in the same division, the possibilities of the extension of the table of geographical division and the adaptation of the table of chronological division in KDC.

• Archives of design research
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• v.20
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• pp.293-304
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• 1997

The Wiener Werkstatte created the most avangarde textile designs in Europe at the end of the 19th and the beginning of the 20th century. This study is to examine the distinctive characteristics of the textile design of the Wiener Werkstatte. The purpose of this study is to analyze the textile designs of the various designers who had contributed to shape the characteristics of the Wiener Werkstatte at various stages, and to catagorize the designs according to the subject matter, the design sources, the layout, the design principles, and the usages. The textiles of the first half of the Wiener Werkstatte are wovens for the homefurnishings. They were used as upolsteries. Wall coverings, and curtains in the commissioned buildings and houses which Hoffman designed and built in conjunction with the Wiener Werkstatte. The designs of this period have the simple and bold characteristics using less then three colors in a design. The subject matters used in the designs are firstly, stylized animals and plant forms; secondly, the purely geometric forms derived from the architural buildings. The textiles of the latter half of the Wiener Werkstatte put more emphasis on the printed textiles for the women's apparels. The textile designs of this period are categorized into four groups : firstly, the designs that stylized plant forms ; secondly, reinterpretational designs; thirdly, ethnic designs : and fourthly, the geometric art deco designs. The number of colors used in a design range up to 7 colors and all over, stripe, and ogee layouts are used.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.39 no.4
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• pp.66-76
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• 2021

The purpose of this study was to analyze the transition process of Gyeongpo lake and to analyze the viewing characteristics of each period in the pavilion. The view characteristics at pavilion were analyzed by overlapping classification maps of landscape types by period with the view range map from pavilion. The circumference and area of Gyeongpo lake have been reduced to 15.2km and 3.9km² in the 1750s, 9.0km and 1.7km² in the 1933, and now 4.41km and 1.0km². By period, the largest decrease in the proportion of Gyeongpo lake viewed from Pavilion was Hwanseonjeong, which decreased by 48.0% from the 1750 to 2017. Hwallaejeong, Haeunjeong, and Hohaejeong were found to be impossible to view Gyeongpo lake as some of the adjacent lakes were changed to agricultural land. Pavilion has great significance as a space for traditional culture created in the background of humanities and natural environments. For the succession and development of Pavilion culture, it is necessary to use it as a cultural resource, to continuously manage the building, and to partially restore Gyeongpo lake considering the function of each pavilion.

• The Journal of the Convergence on Culture Technology
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• v.5 no.2
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• pp.321-327
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• 2019

This study aims to investigate the transition of the game rating system in Korea and to search for problems and improvement measures in the era of IARC game grade review. IARC(International Age Rating Coalition) is an International Classification Alliance, with 37 member organizations from 6 countries. In addition, IARC grants participating store-fronts autonomy to review game ratings. The method of deliberating games in Korea is proceeding with direct review by rating system and deliberation by IARC's own classification system. The problem of the rating system of the game is that the civilian becomes the subject, it relies on the questionnaire, and its side effects are caused by its own classification system. IARC guidelines can be developed to improve the game rating system, education on penalties and ratings for game developers, and management of participating front-stores. In conclusion, it may be dangerous to delegate rating authority to open market, and it is necessary to construct a discussion forum for ratings, including government and industry, game developers, users, and parents of under-age gamers. It is necessary to create a rating system for the game environment in Korea.

• Journal of The Korea Institute of Healthcare Architecture
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• v.24 no.3
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• pp.17-27
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• 2018

Purpose: This study aims to examine spatial characteristics of emergency department Chronologically through case studies; and to consider the social implication of these spatial changes. Methods: In this study, a total of eight emergency departments, one for each period, were selected in order to analyze the spatial characteristics. The spatial maps of Space Syntax were employed for analyzing case studies. Results: The spatial configuration of emergency department has been changed from five or more emergency department specialties to four or less specialties such as psychiatric, pediatrics, emergency, and trauma. In the case of care initiation area, the concentrated arrangement mode was switched from the distributed arrangement mode. The spatial maps indicate that it can be seen that the tree structure changes to an annular structure emphasizing the connection between the spaces in the emergency department. This shows that the space efficiency, safe, visual control and flexibility in the planning of the emergency department are important factors affecting the spatial structure of the emergency department. Implications: In the future, it is expected that Korean emergency department will be more focused on efficiency, safe, visual control, and flexibility in the planning as in the case studies of the United States.