• Journal of Digital Convergence
• /
• v.11 no.10
• /
• pp.181-187
• /
• 2013

In this study, university students career decision efficacy through group counseling program to verify the effectiveness of group counseling program in the future career development of students and the university's career guidance aims to be the basis of the direction of the setting. Verification results first college career counseling program has not been applied to the experimental group compared to the control group, the level of efficacy was improved career decision. Change of career decision-efficacy between groups T-test results shall not be liable for the entire career decision efficacy significant difference was found that factors For a detailed planning, self-evaluation of the results showed no significant changes.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2018.05a
• /
• pp.437-437
• /
• 2018

본 연구는 댐 후보지에 대한 우선순위 분석이 결측 정보에 따라 다기준 의사결정 방법 및 결측정보 접근방법에 따라 어떻게 달라지는지를 조사하였다. 전략환경평가(Strategic Environmental Assessment, SEA)는 한국의 댐 건설 장기 계획에서 환경 및 생태학적 영향을 기반으로 한 지속가능한 댐 후보지 선정에 적용되고 있다. 그러나 특정 정보가 결측된 경우 SEA는 댐 후보지를 선정하는 데 어려움이 있다. 본 연구에서는 다기준 의사결정 방법으로 AHP, ELECTRE III, PROMETHEE II, Compromise Programming을 적용하였고, 결측 정보 보완을 위해 이항분포와 균등분포형을 사용하였다. 본 연구에서는 전국의 댐 선정 후보지에 적용하여 다중 기준 의사 결정기법과 정보 생성 방법에 의존하여 결과를 비교하였다. 그 결과, 이항분포형을 적용한 결과가 균등분포형을 적용한 결과보다 보다 명백한 우선순위를 보여 주었다. 또한, 다기준 의사결정방법에 따라서는 댐선정 후보지 결과가 달라지지 않는 것으로 나타났다. 따라서, 다기준 의사결정방법 적용시, 결측 정보를 생성하기 위해 이항분포를 사용하면 균등분포 적용시보다 우선순위를 제공하는데 더 효과적이라고 판단된다.

• Journal of the Korean Crystal Growth and Crystal Technology
• /
• v.6 no.3
• /
• pp.327-340
• /
• 1996

In this study, a series of $LiNbO_{3}$ crystals with different [Li]/[Nb] ratios, congruent $LiNbO_{3}$ crystals with doped Mg and with Mg and codoped with Mn were grown by the Czocharalski method. These were investigated by UV and IR spectrophotometry. Stoichiometry dependences of the UV absorption edge and the $OH^{-}$ absorption spectra were studied with different [Li]/[Nb] ratios. The position of the UV absorption edge adn the shape and peak point of the $OH^{-}$ absorption spectra changed monotonously upto a critical concentration of Mg ions. The mechanism of the incorporation of Mg ions changes at this concentration. The decomposition of the $OH^{-}$ absorption spectra using a Gaussian lineshape function showed that in Li-deficient crystals the absorption spectra consist of five components in contrast to more or less perfect stoichiometric crystals which reveal to three components. On the basis of these results, the intrinsic and the extrinsic defect structure models in $LiNbO_{3}$ crystals were examined. The behaviour of $\nu$ (OH) reflects the defect structure and supports the Li-site vacancy model as the intrinsic defect structure model and the corresponding extrinsic defect model. A brief discussion is also given of the behaviour of $\nu$ (OH) in $LiNbO_{3}$ crystals simultaneously doped with several kinds of impurity.

• Journal of the Korean Crystal Growth and Crystal Technology
• /
• v.20 no.6
• /
• pp.254-261
• /
• 2010

Polycrystalline silicon (pc-Si) films are fabricated and characterized for application to pc-Si thin film solar cells as a seed layer. The amorphous silicon films are crystallized by the aluminum-induced layer exchange (ALILE) process with a structure of glass/Al/$Al_2O_3$/a-Si using various thicknesses of $Al_2O_3$ layers. In order to investigate the effects of the oxide layer on the crystallization of the amorphous silicon films, such as the crystalline film detects and the crystal grain size, the $Al_2O_3$ layer thickness arc varied from native oxide to 50 nm. As the results, the defects of the poly crystalline films are increased with the increase of $Al_2O_3$ layer thickness, whereas the grain size and crystallinity are decreased. In this experiments, obtained the average pc-Si sub-grain size was about $10\;{\mu}m$ at relatively thin $Al_2O_3$ layer thickness (${\leq}$ 16 nm). The preferential orientation of pc-Si sub-grain was <111>.

• Journal of Gifted/Talented Education
• /
• v.23 no.4
• /
• pp.567-592
• /
• 2013

The purpose of this study is to investigate effective teaching and learning method for teaching decision-making on Socio-Scientific-Issues(SSI) in science classroom. So we carried out new teaching and learning trial for decision-making about Global Warming issues. Our new trial focused on self-directed and cooperative learning in decision-making about SSI. And our participants were science gifted or science high-achieved students in middle school. We analysed students' written decision-making of the last process in our new trial. We can find our instruction made progress in informed decision-making, structure of argumentation, reflective thinking stage, using the scientific information and understanding of the nature of science. As a result, self-directed and cooperative learning in decision-making on SSI leads students to the meaningful decision-making scientifically.

• Journal of Korea Society of Industrial Information Systems
• /
• v.26 no.4
• /
• pp.73-89
• /
• 2021

Establishing career goals and making a career choice is the most crucial task for college students. This study aims to identify the motive of college students' career choices and analyze the relationship between career capabilities and career decision-making in order to provide basic materials that can assist college students in the career decision-making process. To do this, a survey was conducted among college students attending a D university in Busan. A total of 326 survey responses were selected for analysis, and path analysis was conducted using SPSS 25 and AMOS 25. The results of the study are as follows. First, intrinsic motivation for career choice and extrinsic motivation for career choice were found to affect career consideration and career management capabilities, respectively, with statistical significance. Second, career consideration and career path management capabilities influenced both concreteness and confidence, which are elements of career decision-making with statistical significance. Intrinsic motivation for career choice and extrinsic motivation for career choice affected concreteness and confidence in career decision-making with career consideration and career management capabilities as parameters. These findings imply that in order to increase the concreteness and confidence in the career decision-making of undergraduate students, it is necessary to strengthen their career consideration and career management capabilities. As the unemployment rate of youths rises and the types and specialization of jobs increase amid uncertainty in the future employment conditions, undergraduate students face increasing difficulties in career decision-making. The results of this research are expected to be used as basic materials for the career decision-making of undergraduate students, which will assists in career path consultation and guidance in universities.

• Journal of Korea Foundry Society
• /
• v.42 no.4
• /
• pp.209-217
• /
• 2022

In the present study, in order to prevent the misrun defects that occur during traditional brass casting, a method for selecting the proper casting process conditions is proposed. A learning model was developed and demonstrated to be able to learn the presence or absence of defects according to the casting process conditions and to predict the occurrence of defects depending on the certain process given. Appropriate process conditions were determined by applying the proposed method, and the determined conditions were verified through a comparison of different simulation results with additional conditions. With this method, it is possible to determine the casting process conditions that will prevent defects in the desired sand model. This technology is expected to contribute to realization of smart traditional brass farming workshops.

• Proceedings of the Korean Information Science Society Conference
• /
• 2002.10d
• /
• pp.700-702
• /
• 2002

원자력발전소 1차계통 주요기기와 2차계통 주요기기들에 대한 가동 중 검사시 발견된 결함은 ASME Sec. XI, IWB와 IWC에 근거하여 허용여부를 결정한다. 이때, 결함 크기가 허용기준을 초과하는 경우에는, 기기의 안전성 확보를 위해 ASME Sec. XI에 규정된 절차에 따라 파괴역학분석(Fracture Mechanics Analysis: FMA)을 수행하고, 그 결과에 따라 운전중지 후 보수 또는 계속운전의 판단을 한다. 따라서, 원자력발전소 주요기기에 대한 FMA기술은 안전성평가의 핵심이 되는 부분이다. 원자력발전소의 안전성평가에는 결함의 형상 정보, 환경 정보, 재료 물성치, 응력 데이터 등 방대한 양의 데이터가 필요할 뿐 아니라 파괴역학적 분석절차도 매우 복잡하여 전문가도 많은 시간과 노력이 요구된다. 이러한 문제점을 해결하고자 일부 평가절차를 컴퓨터 프로그램화하여 효율적인 안전성평가가 이루어지도록 노력하고 있다. 본 논문에서는 파괴역학적 분석에 필요한 응력 데이터를 관리하는 응력 데이터베이스를 구축하고, 응력확대계수계산 프로그램(KEVA)과 결함허용여부를 결정하는 프로그램(Acceptance Standard)과 결함성장률 계산 프로그램(FLEVA)을 Web 기반으로 개발하고 구현결과를 소개한다.

• The Journal of Engineering Geology
• /
• v.5 no.3
• /
• pp.331-337
• /
• 1995

In estimating the azimuth of regional earthquakes with single -station three - component data, in some cases the result is dependent on the selection of waveforms, making the measurement subjective and inconvenient in automatic detection. In this paper an alternative approach is proposed in which the azimuth is measured from quite a long wave train by time - direction stacking technique. Test with digital waveform data from Korean seimic stations shows that the simple algorithm seems to be able to give a better estima- tion of azimuth of earthquakes at regional distances.

• The Korean Journal of Financial Management
• /
• v.14 no.1
• /
• pp.51-73
• /
• 1997

본 연구는 거래비용이 최적 소비 및 투자결정에 미치는 영향을 다루고 있다. Constantinides (1986), Davis와 Norman(1990) 그리고 Shreve와 Soner(1994) 등은 위험이 없는 하나의 유동성 자산과 현금배당이 지급되지 않는 하나의 비유동성 자산이 존재하는 경우에 있어서 소비와 포트폴리오 선택문제를 연구한 바 있다. 본 연구는 이러한 기존연구들을 확장하여 다수의 유동자산과 현금배당이 지급되는 하나의 비유동성 자산이 존재하는 경우의 최적 소비 및 투자결정 문제를 다루고 있다. 투자자의 비유동성 자산에 대한 잠재가치(implicit value)평가와 소비 및 투자결정간의 관계식을 구하여 이를 적용해 본 결과, 투자자의 최적 소비 및 위험부담(risk taking) 수준은 일반적으로 그들의 포트폴리오상에 유동성 자산의 비율이 증가할수록 증가한다는 사실을 확인할 수 있었다. 또한 거래비용이 존재하는 경우에는 기업의 배당정책이 투자자의 최적 소비 및 투자결정에 중요한 영향을 미치는 것으로 확인되었다.