• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.10
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• pp.509-519
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• 2016

This study intends to examine how the subjective health perception of drinkers influences the depression trajectory change by using longitudinal data for elderly drinkers. This study has set up a balanced panel by combining the results from "Aging study panel research" conducted in the year 2006 (1st), 2008 (2nd), 2010 (3rd), 2012 (4th). A total of 543 elderly drinkers, who have responded to each research have been selected as targets for the final analysis. In the analyses, descriptive statistics and Latent Growth Modeling were conducted to examine the causal relationship between the observed and latent variables. The results are as follows: First, it was found that there was a negative correlation-with statistical significance-between the initial value of subjective health perception and the initial status of depression symptom. Second, there was a positive correlation between the initial value of subjective health perception and the changes of depression symptom. This indicates that elderly drinkers with high health perception usually have high degree of depression change; however, this does not mean it was statistically significant. Third, there was a statistically significant correlation between subjective health perception change and depression symptom change. It was found that the depression change level would be low if the subjective health perception change level was high. Thus, we can assume that the depression symptoms of elderly drinker c would slow down if the subjective health perception level increases.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.448-448
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• 2021

최근 급격한 기후변화와 도시화 및 산업화로 인한 지류하천에서의 수량과 수질의 변동은 생물 다양성 감소와 수생태계 건강성 저하에 큰 영향을 미치고 있다. 효율적인 수생태 관리를 위해서는 지속적인 유량, 수질, 그리고 수생태 모니터링을 통한 데이터 축적과 더불어 면밀한 상관 분석을 통해 수생태계 건강성의 악화 원인을 규명해야 할 필요가 있다. 그러나 수많은 지류하천을 대상으로 한 지속적인 모니터링은 현실적으로 어려움이 있으며, 수생태계의 특성 상 단일 영향 인자만으로 수생태계의 건강성 변화와의 관계를 정확히 파악하는데 한계가 있다. 따라서 지류하천에서의 유량 및 수질의 시공간적인 변동성과 다양한 영향 인자를 고려하여 수생태계의 건강성을 효율적으로 예측할 수 있는 기술이 필요하다. 이에 본 연구에서는 경험적 데이터 기반의 머신러닝 모델 구축을 통해 미계측 하천에서의 수생태계 건강성 지수(BMI, TDI, FAI)의 등급(A to E)을 예측하고자 하였다. 머신러닝 모델은 학습 데이터셋의 양과 질에 따라 성능이 크게 달라질 수 있으며, 학습 데이터셋의 분포가 불균형적일 경우 과적합 또는 과소적합 문제가 발생할 수 있다. 이를 보완하고자 본 연구에서는 실제 측정망 데이터셋을 바탕으로 생성적 적대 신경망 GAN(Generative Adversarial Network) 알고리즘을 통해 머신러닝 모델 학습에 필요한 추가 데이터셋(유량, 수질, 기상, 수생태 등급)을 확보하였다. 머신러닝 모델의 성능은 5차 교차검증 과정을 통해 평가하였으며, GAN 데이터셋의 정확도는 실제 측정망 데이터셋의 정규분포와의 비교 분석을 통해 평가하였다. 최종적으로 SWAT(Soil and Water Assessment Tool) 모형을 통해 예측 된 미계측 하천에서의 데이터셋을 머신러닝 모델의 검증 자료로 사용하여 수생태계 건강성 등급 예측 정확도를 평가하였다. 본 연구에서의 GAN에 의해 강화된 머신러닝 모델은 수질 및 수생태 관리가 필요한 우심 지류하천 선정과 구조적/비구조적 최적관리기법에 따른 수생태계 건강성 개선 효과를 평가하는데 활용될 수 있을 것이다. 또한 이를 통해 예측된 미계측 하천에서의 수생태계 건강성 등급 자료는 수량-수질-수생태를 유기적으로 연계한 통합 물관리 정책을 수립하는데 기초자료로 활용될 수 있을 것이라 사료된다.

• Archives of design research
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• v.20 no.1 s.69
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• pp.5-20
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• 2007

The aim of this research is to find out the flows of mega-trends and design trends by analyzing the factors that influence trend and design trends in the late 20th century. Moreover, it is to forecast and recommend design color trends by evaluating color trends in design trends for the near future. Secondary and primary research were used in parallel. In the late 20th century, mega-trends were analyzed from secondary research based on PEST. Design trends were analyzed from case studies in fashion, space, product and visual design. On this basis, design color trends were analyzed. Also, color trends were forecast for the near future. The results are as follows. Firstly, the main trends in the late 20th century were 'female thinking', 'back to the nature' and 'heaven of peace'. Second, main design trends in the 1970s were modernism, post-modernism and high-tech. In the 1980s, with those of the 1970s, ecology was introduced In the late 1980s. In the 1990s, modernism rose again and ecology had an influence. The trends of 'female thinking' and 'back to the nature' controled the design in the early 2000s. Third, design colors in the late 20th century changed from Red to Purple Blue. Tones changed from 'grayish' to 'dull' Finally, it was forecast that Purple Blue, Yellow Red and Green colors with 'grayish', 'dull' and 'deep' tones were going to be used mainly in the near future. Also, achromatic colors with female and warm nuances would be reflected in design parts. This research will be very useful in that it has built a concrete database reflected on design trends forecasting in the near future by organizing academically a methodology to identify trends reflected on design and identifying relation between mega-trends and design trends based on analyzing factors that influence trend.

• Journal of the Korean Society for Railway
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• v.19 no.3
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• pp.397-407
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• 2016

This study analyzed the efficiency change and the factors affecting productivity change for the six railway operation corporations that are local public enterprises; study was performed with the DEA-CCR Model and Malmquist Productivity Index, using data collected from 2010 to 2014. Since it was not feasible to collect data on the operating expenses and the number of employees of each of the lines, the efficiencies of each operation corporation were analyzed by integrating the operation corporations, and the Malmquist Productivity Index was used to investigate the trend of the periodical productivity change. Average efficiency for urban railway operation corporations was found to be higher in the case of the bigger corporations. In 2014, the Seoul Metro and the Daejeon Metropolitan Express Transit Corporations were analyzed and found to be the most efficient operation corporations. The Malmquist Productivity Index was used to determine the periodical change; the average MPI was 1.06, with a continuous increase of productivity. The analysis showed that changes of technology were generally more obvious than change of technology efficiency for all six operation corporations.

• Journal of the Korean Society for Library and Information Science
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• v.19
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• pp.3-22
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• 1990

이 글은 1990년 10월 29일부터 11월 1일까지 서울 아카데미 하우스에서 열린 제11차 국제문헌정보연맹 아시아$\cdot$태평양위원회 학술회의에서 행한 기조연설의 내용이다. 이 학술회의의 주제인 국가정보정책의 현황과 주요 문제를 정리하여 제시하는 것이 기조연설자가 맡은 과제라 보고 첫째, 최근 수년간 한국정부가 입안 실행한 산업정보정책을 살펴보고 둘째, 일반적으로 개발도상국에서 국가산업정보정책은 누가 입안하고, 입안된 정책은 누가 실행하며, 한국의 경우는 어떤지를 살펴보았다. 산업정보정책은 한 나라의 산업정보봉사활동이 이루고자하는 여러 목표들을 열거한 것이며, 다른 분야의 경우와 마찬가지로 정부에 의하여 결정된다. 산업정보정책을 심의 결정하여 공포하는 것도, 지정된 기관에 재정지원을 제공하거나 법적 의무를 지워 공포된 정책을 실행하는 것도 정부의 책임이다. 제6차 경제사회발전 5개년 계획(1987-91) 속에 표시된 한국정부의 전반적 산업정보정책은 $\ulcorner$산업기술정보 유통지원을 강화하여 현행 산업연구원내 기술정보유통센터의 운영을 대폭 강화하고 전국적 온라인 전산망을 구축하여 산업연구원을 명실 상부한 국가의 중추적 기술정보유통기관으로 육성해나가는 한편 이를 토대로 기술정보 거래시장(테크노 마켓트)을 설치 운영$\lrcorner$하는 것이다. 산업정보정책은 산업발달을 위한 정책 속에 통합되고, 그것은 다시 경제발전 및 기타 부문의 국가발전 정책 속에 포함되는 것이 바람직하다. 한국에서 일반경제정책은 경제기획원이, 산업정책은 상공부 가, 기술정책은 과학기술처가, 재정정책은 재무부와 한국은행이, 통신정책은 체신부가 심의 입안한다. 산업정보정책의 일부를 이루는 산업정책 입안의 주요 책임은 상공부의 산업정책국에 있다. 모든 개발도상국에 꼭 같이 적용할 수 있는 국가산업정보정책 입안 및 실행 지침 같은 것을 마련하기는 어렵다. 그것은 이 분야에 개발된 일반모형이 없고 또 개발도상국이라고 하는 것이 동질집단이 아니기 때문이다. 개발도상국 사이에는 그 경제 발전면에서 뿐만 아니라 정보활동 면에서도 큰 수준 차가 있다. 각 개발도상국은 그 나라 고유의 전통과 형편에 맞는 산업정보정책을 마련하여야 한다. 그렇지만 발전 수준이 비슷한 다른 나라의 산업정보정책을 검토하여 자국의 가능성과 제한점을 바르게 이해하는 일은 적절한 정책 입안에 있어서 도움이 될 것이다. 본 기조연설은 아시아와 대양주의 다른 개발도상국 정책 입안자들에게 그러한 검토자료를 제공할 목적으로 행해진 것이다.

• Journal of Energy Engineering
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• v.21 no.1
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• pp.1-17
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• 2012

In Korea, there are increasing concerns on nuclear manpower demand and supply due to construction of domestic nuclear power plants and exporting nuclear power plant. In addition, aging of nuclear manpower is another important concern for stable nuclear manpower demand and supply. A shortage of skilled high-quality human resources resulted in massive retirements of senior workers may seriously undermine Korean nuclear competitiveness. This paper analyzed current state of aging of nuclear manpower based on statistical analysis on Korean nuclear organizations. The data used in this paper is manpower statistics of domestic nuclear organizations surveyed in 2001 and 2010. This paper analyzed trends of manpower change for 10 years and based on these analyses, has reviewed the level of the aging nuclear manpower by surveyed organization and integrated. Finally, this paper suggested to direction of manpower recruitment to cope with aging nuclear manpower and alternatives to find a solution to problems of nuclear manpower demand and supply.

• The Journal of the Korea Contents Association
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• v.18 no.2
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• pp.602-615
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• 2018

Loss has been expanded to include not only death but also the change that take place in the transition of life. In addition, the rate of direct and indirect experience of death around us has increased due to natural disasters and unexpected accidents. Therefore, there is a growing demand for grief counseling and a need for professional grief counseling. The purpose of this study was to investigate the competency of grief counselors and to review on the literatures what grief counselors should be trained to improve their professional competences. Specifically, there were grief counseling theory, evaluation of grief, death education, and counselor self-care. There were suggested that how to integrate into existing counselor curriculum and introduced experiential practice. This study can be used as a basic data for encouraging the attention of grief counselor education and competency model.

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.516-524
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• 2017

This study was to examine the effectiveness of Self-Determination Group Program for children with disabilities in Korea by using method of meta-analysis. For the purpose of the study, master's theses, doctoral dissertations, and journal articles published in Korea up to June, 2017 were systematically reviewed. As a result, a total of 17 studies were eligible for the inclusion criteria. The mean effect sizes and test for homogeneity of effect size(Q-statistic) were analyzed by using Comprehensive Meta-Analysis software 2.0. The main findings of the study were as follows. First, the average effect sizes for Self-Determination Group Program were ES=1.695 of Self-Determination, ES= 1.316 of Social Skills. Second, the moderate variables of the effect size for Self-Determination Group Program was 'age' of 'a type of disability', 'sessions', 'the number of sessions within a week', 'time of one session' and 'a major of the director'. Based on the study results, the research and practice implications were discussed.

• The Journal of Information Technology
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• v.2 no.2
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• pp.251-267
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• 1999

This study examines that pricing multiple on and incremental explanatory power of equity book value(earnings) increase(decrease) as financial health decrease. Test using a sample of 75 bankrupt firms and test using a cross-sectional, pooled sample both yield inference consistent with predictions. It is thus hypothesized that the more bankrupt time are, the higher(lower) pricing multiple book value of equity(earnings) obtained. Findings are robust to inclusion of controls for debt/assets ratio, ROA, and ROIC. Overall, the results is the hypothesis.

• The Journal of Korean Association of Computer Education
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• v.14 no.1
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• pp.55-67
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• 2011

Due to recent various online problems, the necessity of information security education has increased. The information security education was strengthened thanks to the informatics curriculum of middle school in 2007, but the educational fields lacked detailed educational materials that could be utilized. Thus to give appropriate information security education for elementary and middle school students, this research developed an unplugged activity for them. The activity was designed by applying Lickona's integrated ethical model and design patterns of unplugged activities, and developed through expert's review and pilot tests targeted to elementary school students. Developed activity was applied to 21 middle school students and the usability was evaluated. As results, first, the activity showed similar expectations from the previous activities. Second, persistence was also similar or higher compared to the previous activities, so the activity developed from this research secured the minimum usability. The unplugged activity developed from this research would give implications in producing various educational contents for information security education.