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윤여창,김연형,오민권 又石大學校 1998 論文集 Vol.20 No.-
In this paper, we propose a exploratory data analysis system on the World Wide Web, and can offer dynamic graphics. Graphics play an important role of any statistical analysis system. They provide the double role of visual display and diagnostic tool. To serve as a useful diagnostic tool, this system offers many kinds of exploratory data analysis. In order to explore these statistical graphics efficiently, this system might be divided into six windows, i.e. File, Exploratory Data Analysis. Statistic. Correlation, Distribution, Help. This system using JAVA programming language is composed with an easy-to-use environment even for novices in exploratory data analysis.
실업계 고교와 전문대학간 컴퓨터 교과 관련 연계교육의 운영실태 및 개선방안에 관한 교원들의 인식 연구
윤여춘,김창석 한국컴퓨터교육학회 2002 컴퓨터교육학회 논문지 Vol.5 No.4
컴퓨터 산업과 IT산업의 눈부신 발전으로 컴퓨터 관련 교육은 숙련된 인력을 양성하기 위하여 교육의 체제와 방법의 변화가 절실히 필요하게 되었다. 직업교육 훈련 촉진법 및 고등교육법 시행령의 법적 지원과 '신교육 체제의 수립을 위한 교육 개혁 방안(Ⅱ)' 발표로 실업계 고등학교와 전문대학간 교과 과정을 상호 연계하여 운영되고 있다. 그러나 실업계 고등학교와 전문대학간 컴퓨터 교과 관련 연계교육을 성공적으로 운영되기 위한 연구는 미흡한 실정이다. 이에 본 연구는 실업계 고교와 전문대학간 컴퓨터 교과와 관련하여 조사 연구결과 연계교육의 개선방안을 제안한다. With the rapid development of computer and IT industry, the education related to computer come to need computer need sincerely the system of an education and transform of a method in order to rear experienced people. With the publication of legal support of professional educational training promotional rule and high educational enforcement's rule and 'Educational reformation plan for establishing a new educational enforcement's rule and 'Educational reformation plan for establishing a new educational system (Ⅱ)', associated actions between a vocational high schools and technical colleges are being conducted together. But there have rarely been researches which operates successfully the computer curriculum between vocational high school and technical colleges. Accordingly the purpose of this research is proposed to improve the associated actions of the two schools.
윤여창,하정우 대한방사선 방어학회 1988 방사선방어학회지 Vol.13 No.2
조사된 경수로 핵연료의 도로 수송시, 방사선 영향을 INTERTRAN 코드로 평가하였다. 계산된 결과는 인구밀도로 구분한 각 지역의 소집단과 작업자에 따라 집단 선량당량으로 구하였다. 정상 수송과 수송 사고에 대한 평가 결과, 각 집단의 선량은 매우 낮은 수준을 나타내었다. 계산 프로그램은 다양한 입력 자료에 의하여 정량화 되므로 앞으로 입력 자료의 확보를 위한 연구가 필요하다. The radiological impacts due to transportation of irradiated PWR fuel by truck were assessed for incident free and accident conditions with the computer code INTERTRAN. The resulting collective doses exposure to different subgroups of the public and of the workers were determined. Resulting collective doses for crewman and the public sharing the transport link and living in a corridor on either side of the route are small. All attempts to quantify the risk from the transport suffer from a lack of good input data. It is in these areas that the most important advances can be made.
SHS 공정에 의한 텅스텐 산화물로부터 고순도 텅스텐분말 제조
이승영,윤여훈,이종현,원창환 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.1
99% Pure tungsten powders were prepared by self-propagating high temperature synthesis (SHS) process from a mixture of ammonium paratungsten(APT) and Mg powders. The concurrently formed MgO in the product was leached with an HCI solution. The optimum molar ratio of APT to Mg is 1:46 and the compaction pressures range from 2000 to 4000 psi. The propagation velocity and combustion temperature increased, as the compact diameter increased. The weight change and elongation of the SHS product were affected by compaction pressure on the green pellet. The tungsten product had a purity of 99% and mean size of 2∼3 μm.
이수걸,문창형,김무영,최성호,여동승,강필중,송철수,조몽,양웅석,허윤,문한규 대한내과학회 1992 대한내과학회지 Vol.42 No.2
저자들은 Cronkhite-Canada 증후군 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Cronkhite-Canada syndrome is a disease entity, including such characteristics as gastrointestinal polyposis associated with ectodermal changes-alopecia, hyperpigmentation of the skin and atrophy of the nails. But it has no familial tendency. In 1955, a report of 2 patients by Cronkhite and Canada established this entity as clinically distinct from any of the other known forms of gastrointestinal polyposis. Since that time, at least 53 similar casas has been described in the world literature, but no case has been reported in Korea.
손보형,이효빈,황호길,윤창륙,여환호 大韓顎顔面成形再建外科學會 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.4
The author investigated the 162 patients with the condylar fractres of the mandilble who were admitted in Dept. of Oral and Maxillofacial Surgery, Hospital of Chosun Dental School from January 1985 to September 1992 clinically, including fracture incidennce, age and sex of the patients, causes of injures, associated injures, treatments and complications and obtained the following results. 1. Of the 449 patients with mandibular fractures, 162patients suffered condylar fractures(36.1%). 2. Of the 162 patients, males with condylar fractures were 128 patients, by a ratio of 3.8 : 1. 3. The most frequently affected age group was the third decade(32.7%). 4. Falls were ranked as the predominant cause(50.6%), followed by traffic accident(27.8%) and violence (16.0%). 5. The incidence of single condylar fractures was 28% and symphysis fractures were the most commomest of the concomittant injuries(60%). 6. The subcondylar fractures occurred most frequently(41.6%) and anteromedial displacement of the condylar fragments occurred most frequently(45.4%) 7. Of the all condylar fracture patients, children under 15 of age comprized 31 patients(19.1%) and condylar head fractures occurred most frequently at those children. 8. Of the managetments in condylar fractures, open reduction was 52.5% and remainder were closed reduction(47.5%). 9. Complications ensured such as TMJ ankylosis, limitation of mouth opening and mandibular movements, TMJ dysfunction, and anterior open bite.
Hygroscopic Property of Heat Treated Yellow Poplar (Liriodendron tulipifera) Wood
( Yoon-Seong CHANG ),( Yeonjung HAN ),( Chang-Deuk EOM ),( Sangjin CHUN ),( Hwanmyeong YEO ) 한국목재공학회 2019 목재공학 Vol.47 No.6
In modern societies, people spend most of their time indoors and the temperature and humidity controlled by electrical appliances have a considerable effect on their emotions and health. However, improper operation of the artificial facilities frequently creates substances that are harmful to our body. The importance of controlling the natural humidity of interior materials has therefore attracted significant attention. This study was aimed at quantifying the hygroscopic property of some interior finishing wooden materials. Dried and heat-treated yellow poplar (Liriodendron tulipifera) lumbers, oriented strand board, and plywood were selected for this experiment. The moisture adsorption and desorption rates of wooden materials were measured (ISO 24353). Furthermore, the effects of morphological, physical and chemical factors, such as surface microstructure, roughness, and functional groups, on the hygroscopicity were evaluated. The results of this study should contribute to improved accuracy of hygroscopic-property assessments performed on wooden interior materials.