• KDI Journal of Economic Policy
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• v.35 no.2
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• pp.107-131
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• 2013

In this paper, we test and estimate the stochastic non-fundamental trend in Korean stock market. For this, following Kim (2011), we exploit that the long-run equilibrium stock price may be decomposed into fundamental and stochastic non-fundamental trends (i.e., the sum of dividend innovations and a part that are orthogonal with the dividend innovations) by using the Beveridge-Nelson decomposition and projections. In this VAR construction, there is an error correction mechanism through which stock prices converge to their long-run equilibrium, which also contain the stated stochastic non-fundamental trend as well as fundamental trend. The estimation and test results using yearly data from the Korea (1976-2012) indicated that fluctuations in stock prices during that period can be explained mainly not by the stochastic non-fundamental trend but by the dividend trend. However, during some periods like after Seoul Olympic Games, we may observe the non-fundamental trend affected to the stock price variation.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.328-328
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• 2018

오염총량관리제도에서 목표수질을 설정하고, 허용부하량을 산정하기 위해서는 단위유역별 오염부하량 할당의 기준이 되는 유량인 기준유량 산정이 필수적이며, 현재 BOD는 과거 10년 유황곡선의 평균저수량, T-P는 과거 10년 유황곡선의 평균저수량 또는 평균평수량을 이용하고 있다. 한편, 미국 EPA에서는 TMDL 수립 시 하천에서 발생할 수 있는 다양한 유황을 반영할 수 있도록 전 기간의 유량자료를 활용하여 유황곡선을 작성하여 기준유량을 산정하도록 제안하고 있으며, 이와 같은 유황곡선 작성방법의 차이로 인해 기준유량이 다르게 나타날 수 있다. 또한, 기후변화로 인해 강우패턴이 변하고, 하천의 유황도 변하므로 이를 고려한 기준유량 도출이 필요하다. 본 연구에서는 유황곡선 작성방법에 따른 기준유량 변화를 분석하고, 기후변화가 하천의 기준유량 변화에 미치는 영향을 분석하고자 한다. 유량자료는 HSPF 모형을 이용하여 모의하였으며, 모형의 입력자료 및 보 검정에 필요한 유량자료는 물환경정보시스템의 자료를 바탕으로 구축하였다. 수문 모의기간은 모형의 안정화 기간을 포함하여 2004년부터 2015년까지로 설정하였으며, 최근 5년(2011-2015년)은 보정기간, 과거 5년(2006-2010년)은 검정기간으로 설정하여 보정 및 검정을 수행하였다. 미래 강수량 자료는 기상청에서 제공하는 RCP 시나리오를 적용한 기후변화 시나리오를 사용하여 구축하였으며, 본 연구에서는 RCP4.5를 사용하여 자료를 구축하였다. 본 연구의 결과는 향후 기준유량을 도출하는데 있어 참고자료가 될 것으로 사료된다.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.631-643
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• 2017

The purpose of this study is to examine factors affecting the life satisfaction of patients with hemodialysis in order to improve the quality of life for patients with hemodialysis. The subjects of this study are 168 patients who have undergone hemodialysis treatment in the hemodialysis rooms in D-city and C-providence. The data are collected between August 20th to September 5th, 2015. By using SAS 9.3 statistics program for data analysis, frequency, ${\chi}^2$-test, variance analysis and multiple regression analysis are conducted. Based on the analysis, it is found that family support(t=5.33, p<.001) and self-efficacy(t=3.52, p<.001) are statistically significant to the quality of life for male patients. Family support(t=2.58, p<.012) and adherence to self-care(t=4.08, p<.001) are statistically significant to the quality of life for female patients. With the study results, it suggests that nurses can help improve the affective and psychological stability of patients with hemodialysis by recognizing the factors affecting the life satisfaction of patients with hemodialysis by gender, developing and utilizing a nursing intervention.

• Journal of dental hygiene science
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• v.6 no.3
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• pp.227-230
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• 2006

This purpose of this study was to provide the basic data for preventing dental caries, and maintaining and enhancing oral health. The subject of this study through the survey of the recognition of oral health, a questionnaire survey was conducted for 545 male and female students who were in the 4th, 5th, 6th grade of elementary school in Ulsan city. Statistical analysis was conducted using the SPSS 11.5 with t-test, ANOVA and correlation. The obtained results were as follows 1. Oral health knowledge false for Dental floss silk, Fluoride and very low. 2. The students who were in the 4th, 5th, 6th grade of elementary school is Oral health knowledge, behavior and tooth brushing frequency 4th 5th grade higher than 6th grade(p = 0.000, p,0.005). 3. Oral health knowledge is higher behavior high date (p = 0.001), and Oral health behavior is higher many tooth brushing frequency (p = 0.000).

• Journal of Digital Convergence
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• v.14 no.10
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• pp.355-365
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• 2016

This study was conducted to evaluate the relationships between emotional intelligence and college adjustment and nursing professionalism in nursing college students. The study participants were 172 nursing students of a university in Chungnam province. Data were collected by a self-administered questionnaire from December 1 to 20, 2015. Collected data were analyzed using the IBM SPSS 20.0 program with descriptive statistics, Pearson's correlation coefficient, t-test, one-way ANOVA and Scheffe test. The level of the emotional intelligence, college adjustment, and nursing professionalism were not high, and the emotional intelligence of nursing students had positive correlation with college adjustment(r=.448, p<.001)and nursing professionalism(r=.376, p<.001). These results suggest that nursing interventions to improve the emotional intelligence of nursing students should be developed and applied for improvement of college adjustment and nursing professionalism.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2017.04a
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• pp.172-172
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• 2017

최근 급변하는 농촌인구 감소와 고령화로 인한 농업농촌의 경쟁력 향상을 위해 농업에 정보통신기술(ICT)을 접목한 스마트 팜 기술개발이 추진되고 있다. 현재 농촌진흥청에서는 한국형 스마트 팜 ICT 기자재 표준규격을 개발하고 단체 표준을 제정하고 있다. 개발된 시설원예용 기자재 중 센서 13종, 구동기 9종 그리고 환경제어용 3종 등 총 25종의 표준규격에 대한 검정이 요구되어, 표준규격 부합 여부를 객관적으로 확인하기 위한 검인증 체계 구축을 필요로 하게 되었으며 본 연구에서는 표준규격이 설정된 기자재에 대한 검인증방법과 계측시스템을 구성하여 검인증체계를 구축하고자 하였다. 센서 13종 중 온도센서는 비교시험을 하기위해 기준 온도센서가 정밀도는 $0.01^{\circ}C$, 정확도는 ${\pm}0.01^{\circ}C$를 갖는 것으로 선정하고 항온조는 작동범위가 온도는 $(-)50{\sim}(+)120^{\circ}C$, 습도는 (30 ~ 98)%R.H.로 조절이 되는 구조의 것으로 구성하여 기준센서와 오차정도를 산출하는 방법으로 실시할 것이며, 센서 인터페이스 등 구조는 T.T.A. 단체 표준에 적합여부를 확인하여 적합성 여부를 판단하고 현재까지 센서 13종과 구동기 9종에 대한 검정방법 제정을 추진하고 있다. 지금까지는 스마트 팜 중 시설원예용 기자재 표준규격 부합여부를 확인하는 수준이지만 향후 개별 성능확인 호환성 확인시험방법을 추가하여 고도화를 추진 하고자 한다.

• Journal of The Korean Association of Information Education
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• v.24 no.4
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• pp.327-335
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• 2020

This study intends to examine the effects of education using robot on computational thinking and attitudes according to left and right brain preference. To execute the study, 17 elementary students at A youth training center in Seoul were selected to participate in the education. And the mean difference was analyzed using matched pair t-test and Mann-Whitey U test. As a result, after participating in the education, there was some statistical significance found in the scores to test student's computational thinking, but not statistical significance on the attitudes. Furthermore, there was no significance found in computational thinking or attitude according to the left and right brain preference. The purpose of this study can be found in that it expands the understanding of education using robot by verifying the efficacy and analyzing differences according to left and right brain preference.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.10
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• pp.3826-3832
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• 2010

This study was aimed at determining the effect of virtual reality(VR) based exercise programs on energy expenditure during gait in chronic stroke patients. Thirty-two stroke patients were participated for this study. They underwent stroke for more than 6 months and were assigned to a VR-exercise group (n=16) or a control group (n=16). The VR-exercise group executed a rehabilitation exercise three times a week during 6 weeks. The VR-exercise was performed by PS2 for one hour. Control group maintained their usual life without application of exercise. Energy expenditure index(EEI) during gait was calculated from heart rate and gait velocity. After the completion of the VR-exercise, the EEI was decreased significantly (p<0.05). These results showed that the rehabilitation exercise using a virtual reality is effective in the improvement of energy efficiency during gait in chronic stroke patients.

• Journal of Korean Library and Information Science Society
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• v.45 no.1
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• pp.249-270
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• 2014

The purpose of this study is to discover the mobile-based information behaviors of the older adults with comparison of the college students and then to provide some fundamental ideas of the bridging digital devide for them. For this aims, data were collected from seniors and college students living in Daegu and Kyung-buk province via a self-designed questionnaire, and the data of 375 seniors and 323 college students were analysed with $x^2$ and t-test using SPSS. It revealed that the economic condition did not influence in the possession of mobile devices, and for leisure was most favorite activity in both groups. However, the college student group suggested the supply of free or low price mobile device; whereas the older adults group suggested the spread of education of mobile device usage would be the most important matter for bridging the digital devide. Various results of the study were presented with tables and figures in this paper.

• The Journal of the Korea Contents Association
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• v.14 no.8
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• pp.394-405
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• 2014

Purposes of this study are to find difference in efficiency, productivity change and determinants on efficiency of life insurance industry between pre and post-execution of capital market law on the basis of pre(2005-2008) and post-execution(2009-2012) data. Main results of this research are as follows. First, there was no significant difference of mean value for efficiency between pre and post execution of capital market law. Second, difference of mean value for malmquist index between pre and post execution of capital market law was statistically significant at 5% level. This imply increase in productivity for post-execution of capital market law. Third, one of the important determinant for efficiency was the weight of life planner in both pre and post-execution of capital market law. The weight of life planner had significant positive effect on efficiency.