• Journal of Engineering Education Research
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• v.5 no.1
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• pp.3-18
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• 2002

Recently, as the use of the Internet and the Web becomes universal, there has been a great deal of efforts to use it for education among educators throughout the world. The advantage of a Web-based lecture is that people can take it anywhere at a low cost anytime. The demand for learning java programming using the Web is increasing. Accordingly, a number of Web-based Java programming course contents have developed and used. Problems with existing contents are that materials about how to program are not sufficient and the presentation of the lecture is most often separated from the programming environment. In this paper, we present a methodology for developing course contents of Java programming to solve these problems and develop them using it. Then we report the evaluation result of course contents by students who took a Web-based lecture using them.

• Journal of the Korean Home Economics Association
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• v.32 no.2
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• pp.207-218
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• 1994

최근 컴퓨터 디자인을 비롯한 컴퓨터의 응용은 의류패션과 직물 산업분야에 있어서 디자인 및 생산공정이 자동화되는 등 의류 디자인 및 제작에 중요한 역할을 하고 있다. 본연구의 목적은 컴퓨어화 사화의 이행에 따른 1) CAD를 포함한 컴퓨터 시스템의 의류학에의 응용실태 2) 컴퓨터 응용에 대한 인식 및 미래의 방향 3) 의류학내의 전반적인 문제점과 해결방안 등에 대하여 연구하고자한다. 연구방법은 전국 의류학 관련교육과(43개 4년제 대학의 교수) 110명을 대상으로 설문지법을 사용하였으며 회수된 58부 (53% 회수율)를 SAS로 통계처리하여 Likert's mehod of summated ratings로 분석하였다. 연구결과에 따르면 CAD는 11%의 대학에서 컴퓨터개론이 25%의 대학에서 Telecom-munication Spreadsheet Database 는 각각 4%의 대학에서 강의되고 있다. CAD 는 주로 다른과목에 포함되어 "몇주"(4%) "몇일(4%)" 정도 강의되고 있으며 컴퓨터개론은 다른과목에 포함되어"반학기"정도 강의 되는경우(14%) 가 가장많은 것으로나타났다. 또한 37%의 대학에서 앞으로 5년내에 의류학에 컴퓨터디자인 및 컴퓨터 시스템을 도입할 계획으로 있으며 특히 CAD에 대한 관심이 높았다. 64%의 대학이 의류학과 건물내에 컴퓨터 시설이 갖추어져 있지 않아 모든교수들이 컴퓨터교육을 위한 시설 재점비가 필요하다고 하였다. 컴퓨터활용의 부족이 의류학 관련학과의 취약부분으로 인식욈에 따라 앞으로 CAD에 관한 연구 및 컴퓨터 관련 수업의 개설, 시설 확충등이 보완되어야 할 것으로 나타났다. 본연구 결과는 한국내 의류관련학과의 CAD를 포함한 컴퓨터의 응용실태와 성향을 실증적으로 조사분석함으로써 앞으로 나아갈 방향을 제시하고 미국과의 비교분석을 통하여 의류학과 응용이 우리 실정에 맞게 정착되는데 도움이 될것으로 기대된다.

• Annual Conference of KIPS
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• 2002.11a
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• pp.389-392
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• 2002

본 논문에서는 대표적인 NP 문제의 하나인 강의시간표 문제를 분산 제약조건 만족 문제로 해결하는 시스템을 제안한다. 제안한 시스템에서는 복잡하고 방대한 강의시간표 문제를 여러 개의 작은 모듈 단위의 에이전트로 분할한 후 개별 문제외 해를 구하고 이들을 결합시켜 가능해(feasible solution)를 찾는다. 한편, 분리된 에이전트에 의해 해결되는 부-문제들이 상호 의존적이면서 중첩된 경우에 해들 사이의 모순을 해결하면서 최종 해를 구한다. 제안한 시스템에서는 다음과 같은 방법으로 문제를 해결한다. 제약조건을 점진적으로 추가하여 탐색공간을 줄여 나간 후, 국소 탐색을 통해 변수에 일관된 도메인 값을 할당한다. nogood에 대하여 점진적인 제약조건 완화로 탐색공간을 확장하여 모든 변수에 도메인 값을 배정한다. 제약조건 완화는 제약조건들을 몇몇 단계로 정의하고, 휴리스틱 순서와 제약조건의 중요도에 따라 되추적 탐색 기법을 이용하여 순차적으로 완화한다. 만일 과잉-제약조건이 발생할 경우 가중치의 합이 최소로 하는 값을 배정한다. 즉 모든 변수에 도메인 값은 모든 제약조건을 만족하든 초기의 부-문제에 가능해가 될 수 있는 제약조건을 만족해야 한다.

• Journal of the Health Care and Life Science
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• v.9 no.1
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• pp.27-39
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• 2021

The purpose of this study was to explore the learning emotions of nursing students who have changed their course due to COVID-19 through online lectures through diaries. Data were collected from November to December 2020 from 20 four-year nursing college students according to the purposive sampling method. The collected data were analyzed by the traditional content analysis method. As a result of the study, it was analyzed into 4 themes clusters and 17 sub-themes. Derived themes confirmed that 'anxiety due to confusion about online lectures', 'I blamed myself', 'frustration due to difficulties in creating a stable class environment', and 'feeling of helplessness due to lack of developmental human relationships.'

• Explosives and Blasting
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• v.23 no.3
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• pp.83-89
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• 2005

It follows in deterioration of the steel frame structure and becomes remodeling and removal. The construction work characteristic, economical efficiency and stability environment characteristic are planned and considered hereafter control plan of the steel frame structure which is deteriorated currently to cutting mettled plentifully sued on gas cutting of H beam. However it will not be able to apply from the explosives demolition which is makes a weak instantaneously and then collapses the building at the time. In this study, shape charge was used for cutting of the H-beam. That is the element testing to estimate explosives demolition for steel frame structure. As a result, it is found for single-side rutting method, both-sides rutting methods by H-beam thickness and pre-rutting process. It confirmed an affix method and an ease characteristic by fixing tool. Also, it is shown that air blasting decreased about 8dB(A) in order to reduce air blasting used by sand box. However, it will be required to reduce air blasting little more because explosives demolition will be done in urban site.

• Journal of the Korean Electrochemical Society
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• v.3 no.1
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• pp.5-10
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• 2000

In the present work, corrosion rate W and corrosion potential tow were simultaneously measured as a function of relative humidity RH employing the electrochemical wet and dry method as an accelelated atmospheric corrosion method. The W versus (vs.) RH curve is classified into .three regions, namely, the first W plateau region, the second region of the linear relationship between logarithmic W and RH, finally, followed by an abrupt decay region. Based upon the atmospheric corrosion mechanism of mild steel, we introduced another diagram of $\varepsilon_{corr}$ vs. RH which is divided into three regions. In the first region, the corrosion scales are composed of single lepidocrocite-phase $(\gamma-FeOOH)$; in the second region, $\gamma-FeOOH$-phase coexists with magnetite-phase $(Fe_3O_4)$ in the scales and finally the oxide scales change into a single Fe304-phase in the third region. The three distinct regions of both representations share almost each other, which is validated by FT-IR (Fourier transform infra-red) analysis and surface observation. Both representations prove to be convenient and complementary for surveying the spectrum of the atmospheric corrosion of mild steel.

• Journal of the Korean Society for Nondestructive Testing
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• v.24 no.1
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• pp.22-28
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• 2004

Since the used materials of furnace heater tube with different kinds of thermal degradation were not commonly available, the HK-40 steel specimens were heat-treated isothermally at elevated temperature to simulate the microstructure at the service temperature. HK-40 steel specimens with five different aging time were prepared by isothermal heat treatment at $1050^{\circ}C$. The characteristics of the magnetic susceptibility have been investigated for the degradation evaluation of HK-40 steel. The magnetic susceptibility at room temperature increases as the extent of degradation of the materials increases. The variation of magnetic susceptibility was compared with the variation of tensile properties and Vickers hardness. To investigate the effect of the microsturctural change on the characteristics of tensile properties, hardness and magnetic susceptibility, the microstructures were examined by a scanning electron microscope(SEM) and the chemical compositions were analyzed by a energy spectrometer of SEM. As a result, the magnetic susceptibility method can be suggested as one of the nondestructive evaluation methods for the degradation of the HK-40 steel.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.38 no.1
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• pp.79-88
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• 2002

13%Cr martensitic stainless steel has been used mainly with a material for fish pre-processing machinery. However, it has not very nice cutting section because of little of the carbon content. Therefore, SUS420J2 steel that contents 0.3%C with high-strength in spite of the rust is used with a material for fish pre-processing machinery. However, studies on the corrosion characteristics of SUS420J2 steel are relatively rare. Especially, the corrosion phenomenon may cause serious degradation because the fish pre-processing machinery is exposed always to seawater environment. In this paper, the immersion corrosion test was carried out at seawater environment (pH=7.52) on SUS420J2 steel specimens that have various post-treatment conditions and its corrosion characteristics were evaluated. From test results, the specimens such as base metal, vacuum heat treatment, electrolytic polishing and tempering after quenching tend somewhat sensitive from the corrosion. In the case of vacuum heat treatment specimen of continuous immersion during 360 days, the weight loss ratio was high about seven times when compared with the different specimens. On the contrary, SUS420J2 steel specimen that has the heat treatment of tempering after quenching and the electrolytic polishing was less sensitive from the corrosion, and the weight loss ratio was very low.

• Journal of Advanced Marine Engineering and Technology
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• v.34 no.5
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• pp.678-685
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• 2010

GTAW was carried out to the austenitic 304(STS 304) and 22 APU stainless steels. In this case, difference of the corrosion characteristics of welded zone with STS 304 and 22APU mentioned above was investigated with electrochemical methods. Vickers hardness of weld metal in case of STS 304 (Hv-250) showed a relatively higher value than this of 22 APU(Hv-217). The corrosion current densities of weld metal of 22APU and heat affected zone of STS 304 were observed at the highest value compared to those of other welding zone respectively. This is probably because chromium depletion field due to chromium carbide formed to weld metal of 22APU and to heat affected zone of STS 304 can preferentially easily be corroded with more active anode than other fields. Consequently it is thought that application of the other welding methods like as laser welding or using of the optimum filler metals is necessary to improve the corrosion resistance of welding parts of these steels.

• Korean Journal of Soil Science and Fertilizer
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• v.42 no.spc
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• pp.51-56
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• 2009

Numerous methods can be employed to teach students and farmers on soil science and fertilizer. The cartoon is one of the most effective teaching aids both for instructors and students. Instructor becomes a director of the cartoon to organize the framework of story based on the chapter of lecture. Director should adapt the regular sentence on soil science into the short and concise scenario suitable for the visual expression of the cartoon, followed by the selection of the scene for drawing. Next is to cast the instructor for the role of actor or sometimes supporter. After casting, the director starts to draw each cut of the cartoon in sequence. I published the cartoons in weekly serials in the farmer's newspaper for three years. Each cartoon was composed of eighteen cuts and formatted with the introductory, main and conclusive issues. Cartoon started with dialogues between the cast on subject to stimulate the interest by farmers, inserted the tables and graphs for the scientific knowledge and summarized the chapter. Major contents covered in the cartoons were glossary, nutrient uptake, pH, salt accumulation, moisture, pollution, chemical fertilizer, compost and other general aspects of soils. Cartoons had been very popular serial of the newspaper and are archived in the web for reviewing.