• Journal of Korean Library and Information Science Society
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• v.36 no.1
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• pp.131-150
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• 2005

The study reviews the digital library thoughts of Kim Jung-gun's and their fellows to discover the developmental aspects of digital library in Korea. And I present the challenges facing digital library's development and research. Discussed are important requisites and digital library framework, and so on. In addition, included are suggestions for establishment of digital librarianship as a foundation o( research and development of digital library.

• (The) Research of the performance art and culture
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• no.18
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• pp.137-169
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• 2009

This paper pay attention to silent puppets which appear in the traditional puppet performance. Not only movement of silent puppets which are involved with expression of body of the mime, but also various methods overcome limits of the silent are studied in this paper. Through the study of performance method and historic unfolding aspects, I confirm two main points. First point is that overcome limits of the silent, through the diversity of performance aspects. Second point is that silent puppets have been existed since the early stage of history, and show typical unfolding aspects on their way. Combining two main points, We can say that silent puppets go through continuous unfolding aspects on their way and have meaning of existence. The meaning of existence are that silent puppets seek deviant desire which deviate from everyday life and transcendental desire which seek a freedom through an imagination or an idea. It is interesting that the reasons of existence are associated with the emphasis of necessity which is encouragement of audience's desire and imagination that are necessary of accomplish of mime. After all, silent puppets say that diverse attempts which overcome limits of the silent are accomplished with the performance aspects and historic unfolding aspects, and through that sought unusual communication. Through the performance methods and signification aspects, silent puppets say that diverse groping for which maximize of audience's imagination, stimulation of imagination for audience's spontaneousness, and diverse groping for audience mind performance have been performanced as well. I think that those are the voice of silent puppets for activity of mime in the korea.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.378-378
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• 2022

상수도시스템의 과정 중 최종 단계인 급수단계에서 지역전반에 수질문제가 발생할 경우, 직간접적인 피해의 해결은 장기간 지속될 수 있다. 본 연구에서는 실시간 비정형정보의 빅데이터 분석을 통해 상수도시스템에서 수질사고 문제의 파급력과 2차 피해 등의 연결 관계 변화 추적을 위한 기초적 분석을 수행하였다. 과거 대규모 수질사고가 발생된 바 있는 인천광역시 유충발생 사고를 대상으로 뉴스 기사 웹크롤링 절차를 정립하고, 그 결과를 분석하였다. '인천 유충'이 최초 보도되었던 2020년 7월 13일 부터 이후 1년을 대상으로 네이버 통합검색에 의해 표출되는 뉴스기사를 웹크롤링하였으며, 프로그래밍을 통한 불용어 제거 및 관련성 검토를 통해 총 920건의 기사를 분석하였다. 수질사고의 전개양상에 따라 사고발생, 확산, 수습, 그리고 보상의 4단계로 임의 구분하여 분석하였다. 의미분석을 위한 토픽모델링 기법은 잠재 디리클레 할당(Latent Dirichlet Allocation, LDA) 방법을 적용하였으며, 긍부정 감정분석은 KNU 한국어 감성사전(KNU sentiment lexicon)을 활용하여 수행하였다. 토픽 모델링 결과, 사고 발생에서부터 확산, 수습, 보상의 단계에 맞춰 적절한 주제어의 조합에 따른 기사들이 도출되었으며, 단계별 긍부정 기사 비율역시 사고의 전개단계에 따라 적절히 나타남을 확인하였다. 제시된 수질사고 관련 비정형정보 분석 방법론과 결과는 과거 사고 사례 분석을 통한 검색 및 긍부정 키워드 확정, 키워드 발생 비율 변동(사고전과 후)에 따른 상황판단 기준설정 등에 활용이 가능하다.

• The Korean Publising Journal, Monthly
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• s.143
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• pp.13-13
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• 1994

어떤 문학사를 평가하기 위해서는 사적 체계화를 위해 감행한 일반화가 여러 다양한 문학현상을 얼마만큼 체계적으로 서술하는가 하는 점이 살펴져야 한다. 이에 대한 답은 일단 부정적이다. 이 책에서 우선 지적할 수 있는 것은, 한국근대문학의 특수한 전개양상이 거의 부각되지 못했다는 사실이다.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.62-67
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• 2009

본 연구에서는 경기도 설마천 지역에 위치한 독립사면에서 시간에 따라 연속 측정한 토양수분을 이용하여 시계열 분석 을 수행하였다. 토양수분의 측정 방법은 장기간 토양수분의 확보에 신뢰성을 인정받은 TDR을 이용하였다. 관측망의 설계를 통하여 선정한 측정지점에 탐침을 매설하고 공간적인 분포를 가진 시계열 형태의 데이터를 수집하였다. 유출은 해당 사이트 인근에 위치한 사방댐과 전격비교의 수위계에서 실측한 값을 사용 하였다. 전이함수 모형을 사면에서의 토양수분 전이과정에 대응되도록 물리적으로 전개하고 실측한 토양수분 시계열 데이터로 분석한 결과와 비교하였다. 전이 함수 모형은 토양수분 시계열 데이터를 입력변수로 하고 유출 데이터를 반응 변수로 하여 전개하여 토양수분 변화량과 유출간의 전이함수 모형을 도출하였다. 시계열 모형의 전개는 크게 자료전처리, 모형구조의 규명, 모수추정, 모형진단 등의 과정을 통해서 적절한 모형을 도출하였다. 산지 사면에서의 토양수분을 전이함수에 의하여 전개한 모형은 지형적 분포 양상에 따라 특색을 나타내었다. 또한 2003년 가을과 2004년 봄의 전이함수 모형 추정을 통하여 계절별 특성이 나타났고, 모형양상에 원인을 검토해 보았다. 본 연구는 전이함수를 이용한 토양수분의 시계열 분석이 사면에서의 토양수분 변동특성을 지형적, 계절적 특성과 연계하여 이해하고 특성화 하는 과정의 적절한 도구가 될 수 있음을 보여주고 있다.

• Journal of Korea Water Resources Association
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• v.55 no.spc1
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• pp.1235-1249
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• 2022

This study applied the web crawling technique for extracting big data news on water quality accidents in the water supply system and presented the algorithm in a procedural way to obtain accurate water quality accident news. In addition, in the case of a large-scale water quality accident, development patterns such as accident recognition, accident spread, accident response, and accident resolution appear according to the occurrence of an accident. That is, the analysis of the development of water quality accidents through key keywords and sentiment analysis for each stage was carried out in detail based on case studies, and the meanings were analyzed and derived. The proposed methodology was applied to the larval accident period of Incheon Metropolitan City in 2020 and analyzed. As a result, in a situation where the disclosure of information that directly affects consumers, such as water quality accidents, is restricted, the tone of news articles and media reports about water quality accidents with long-term damage in the event of an accident and the degree of consumer pride clearly change over time. could check This suggests the need to prepare consumer-centered policies to increase consumer positivity, although rapid restoration of facilities is very important for the development of water quality accidents from the supplier's point of view.

• The Korean Publising Journal, Monthly
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• s.135
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• pp.16-17
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• 1993

우리 소설이 냉전체제의 닫힌 틀에서 벗어나게 되는 것은 제3세계적 인식의 확대.심화에 말미암는다. 월남전이 우리 소설의 중요영역으로 편입되는 핵심근거는 바로 그것이다. 6.25전쟁소설이란 영역이 있듯이 '월남전소설'이란 영역도 설정이 가능할 정도로 월남전을 다룬 소설은 뜻밖에도 많다. 대표적인 작품을 통해 그 대강을 살펴본다.

• Journal of Periodontal and Implant Science
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• v.25 no.3
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• pp.587-602
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• 1995

The purpose of this study was to compare the effects of citric acid and tetracycline HCI application to the root surfaces of periodontally diseased teeth on the proliferation and spreading of human periodontal ligament cells. The roots were prepared so that the comparison could be made among root planed, citric acid treated and tetracycline HCI treated surfaces. In the cell proliferation experiment, human periodontal ligament cells at a concentration of $1{\times}10^5$ cells/ml were seeded in each culture well with specimens and incubated for 6 hours. Then, the specimens were transferred to a fresh culture well and incubated for 24, 48, 72 hours respectively. The cell counting was done after trypsinization. In the cell spreading experiment, $1{\times}10^4$ cells/ml were seeded in each culture well and incubated for 30min, 6 hours and 24 hours at 37.5$^{\circ}C$ in a $CO_2$ incubator. Then, all specimens were fixed with phosphate buffered glutaraldehydes, postfixed with phosphate buffered osmium tetraoxide, stained with phosphate buffered tannic acid, dehydrated in ethanol, dried at a critical point, coated with gold and examined under a scanning electron microscope. The results were as follows:In the cell proliferation experiments, the number of attached cells increased more in the tetracycline treated group than in the other groups. In the initial attachment, the appearance of the tetracycline treated the groups was slightly more spread out than in the other groups. After 6 hours of incubation, it was observed in most of the cells that cell morphologic alteration went from ovoid shapes sto spindle shapes. After 24 hours of incubation, the cells of all groups had a fusiform appearance and were connected to each other by numerous cytoplasmic processes. The tetracycline and citric acid treated groups had a similar spreading appearance of periodontal ligament cells, but the tetracycline treated group was more effective in the cell proliferation than the citric acid group.

• Journal of Periodontal and Implant Science
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• v.25 no.3
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• pp.741-755
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• 1995

Currently titanium is the material of choice for implants because of its biological acceptance. This high degree of biocompatibility is thought to result, in part, from the protective and stable oxide layer that presumably aids in the bonding of the extracellular matrix at the implant-tissue interface. Endosseous dental implants are interfaced with bone, connective tissue, and epithelium when implanted into the jaw bone. The soft tissue interface including connective tissue and epithelium is one of the most critical factors in the determination of implant maintenance and prognosis. For maintenance of failing or failed implants, it is essential to treat the implant fixture surface to remove bacterial endotoxins and make a surface tolerated by surrounding soft and hard tissues. In this study, the effect of mechanical treatment on titanium plasma sprayed implant on adhesiveness and proliferation of human gingival fibroblasts and changed surface characteristics were studied. titanium plasma sprayed discs manufactured by Friedrichsfeld company were treated with loaw speed stone bur, a rubber point and a jetpolisher. Its surface components were analyzed with Energy dispersive X-ray spectroscopy to evaluate whether the surface characteristics were altered or not. To observe the spreading pattern of the human gingival fibroblasts which attached to the all specimens author used the scanning electron microscope. The results were as follows : Pure titanium and plasma sprayed titanium, stone polished titanium showed titanium peak and small amout of aluminum, so there was no alteration on surface characteristics. Under the scanning electron microscopic examination in the initial attachment of human gingival fibroblast, there was a slight enhancement in pure titanium, stone polished titanium than plasma sprayed titanium. After 6 hours, the pure titanium and stone polished titanium showed human gingival fibroblasts were elongated and connected with numerous processes. Human gingival fibroblasts were more intimately attached on the pure titanium discs than on the other discs. The human gingival fibroblasts attached on the plasma sprayed titanium by thin and elongated processes. After 24 hours, the human gingival fibroblasts connected with each other via numerous processes and compeletly covered the pure titanium and stone polshed titanium discs. Human gingival fibroblasts had multiple point contacts with more long and thin lamellopodia and showed a little bare surface on plasma sprayed titanium discs.

• Proceeding of EDISON Challenge
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• 2016.03a
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• pp.610-613
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• 2016

항공기의 착륙 과정에서 지면효과에 의해 기체가 원하는 위치에 착지하지 못하는 경우가 있다. 이러한 현상들로 인해 항공기의 착륙 실패 또는 활주로 이탈로 인한 인명피해로 이어질 수 있다. 본 연구에서는 이러한 착륙과정에서 쓰이는 날개의 부품중 하나인 Spoiler에 대한 공력 해석을 EDISON 전산열유체 시스템을 이용하여 진행해 보았다. 특히 Spoiler의 전개 각도를 다양하게 변화시켜가며 그 전개 각도에 의한 Lift dumping effect에 초점을 맞추어 연구를 진행하였다. 예상과 동일하게 전개각도가 커질수록 양력은 감소하였으며 항력의 경우 선형적으로 증가하는 양상을 보였다. 또한 전개각도가 20도보다 커지는 구간부터는 양력이 음수로 작아지는 현상을 확인할 수 있었다.