• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.774-784
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• 2011

The purpose of this study, which was conducted as a part of investigations for vitalizing the School Sheriff system proposed as a means to prevent school violence and promote school safety, was to survey recognition of elementary school parents toward the School Sheriff system and present an improvement scheme for the system. For the study, we selected as the research object a set of parents whose children attended schools with School Sheriffs and then sampled 200 parents out of them with cluster random sampling, before analyzing 189 finally. Validity of the questionnaire is verified by expert council and factorial analysis, and reliability by reliability analysis. Statistical means including chi-square test, t-test and F-test are used. The result of the study as follows : First, necessity of the School Sheriff system varies by individual characteristics. Second, recognition toward the system itself varies by individual characteristics. Third, recognition toward the role that should be played by School Sheriffs varies by individual characteristics. Fourth, there is a difference in perceiving the role and activity of School Sheriffs, Fifth, whether the system helped improving school safety varies by individual characteristics. Sixth, the satisfaction from the School Sheriffs.

• Proceedings of the Korean Society of Plant Pathology Conference
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• 1997.06b
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• pp.72-84
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• 1997

• Proceedings of the Korean Society of Potoscience Conference
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• 2002.06a
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• pp.55-55
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• 2002

• Proceedings of the Korean Society of Grassland Science Conference
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• 2001.06a
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• pp.103.2-104
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• 2001

• Proceedings of the Korean Nutrition Society Conference
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• 2001.05a
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• pp.215.1-215
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• 2001

• Journal of Venture Innovation
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• v.1 no.1
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• pp.145-164
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• 2018

The purposes of this study was to investigate job related attitudes of emotional labors working at call centers in Korea. The attitudinal variables were burnout, psychological capital and turnover intention with job characteristics as the independent variables. In addition, leadership behaviors of the superiors, self leadership behavior in particular, was incorporated to see if it has any bearing on these relationship as moderating variable. Data has been collected from 543 respondents for this study using questionnaire method. The survey for the actual analysis of the research was done and analyzed with the employees who work for contact centers in Seoul, Busan, and Gwangju, Korea. The survey was done for 24 days from November, 2016 through December, 2016. * The following study results were revealed: First, the job characteristics does not have direct positive effect on turnover intentions. Second, the job characteristics were related positively to job burnout. Third, the job burnout does mediate the relationship between job characteristics and turnover intentions. Lastly, results of research on the moderating effect of self leadership in relationships between emotional labor, job burnout, psychological capital and turnover intention show that super leadership has only a limited regulatory effect between job characteristics and turnover intention.

• The KIPS Transactions:PartB
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• v.14B no.7
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• pp.531-540
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• 2007

In this research, we proposed a two-phase hybrid stock price forecasting model with cointegration tests and artificial neural networks. Using not only the related stocks to the target stock but also the past information as input features in neural networks, the new model showed an improved performance in forecasting than that of the usual neural networks. Firstly in order to extract stocks which have long run relationships with the target stock, we made use of Johansen's cointegration test. In stock market, some stocks are apt to vary similarly and these phenomenon can be very informative to forecast the target stock. Johansen's cointegration test provides whether variables are related and whether the relationship is statistically significant. Secondly, we learned the model which includes lagged variables of the target and related stocks in addition to other characteristics of them. Although former research usually did not incorporate those variables, it is well known that most economic time series data are depend on its past value. Also, it is common in econometric literatures to consider lagged values as dependent variables. We implemented a price direction forecasting system for KOSPI index to examine the performance of the proposed model. As the result, our model had 11.29% higher forecasting accuracy on average than the model learned without cointegration test and also showed 10.59% higher on average than the model which randomly selected stocks to make the size of the feature set same as that of the proposed model.

• Korean Journal of Food Science and Technology
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• v.29 no.5
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• pp.854-859
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• 1997

In order to compare physicochemical properties of aqueous extract in 3 beans (small red bean, mung bean, black soybean), proximate composition, free sugars, free amino acids, minerals, absorbance and surface refractance color were investigated. Regardless of raw materials composition, the 3 beans extracts had similar proximate compositions. Free sugar analysis showed that fructose, glucose, sucrose, maltose, raffinose and stachyose were varied among the extracts. Raffinose and stachyose were the major sugar and fructose was measured only in black soybean and glucose was merely found in small red bean. Seventeen free amino acids in beans extract were analysed in the extracts. Among the free amino acids, arginine, aspartic acid, glutamic acid and serine were the main amino acids. Black soybean extract had maximum absorbance at 460 nm and 540 nm. L value of black soybean extract was lower than those of small red bean and mung bean.

• Water for future
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• v.20 no.2
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• pp.139-150
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• 1987

The present study is to develop the hydrologic analysis procedure for the purpose of drawing the probable isohyetal charts in Korea. In the establishment of optimal distribution types, the eleven continuous probability distribution types included the transformed variable normal distribution (Y-k method) is applied to the annual maximum rainfall depth series in each duration. The optimal selection of distribution is done by Chi-square test and Kolmogorov-Smirnov test in the eui-class interval. The application of probability distribution is checked by the fitting on four durations of annual maximum rainfall data(10 min., 60 min., 6 hrs., and 24hrs.) at four meteorological stations in Korea (Seoul, In Cheon, Bu san, and Kwang Ju). The properties in hydrologic application of the considered distribution and the hydrologic characteristics of the applied rainfall data groups are investigated from the results of this study.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.211-211
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• 2023

본 연구에서는 지역빈도분석을 이용하고 있는 홍수량 산정 지침에서 활용되고 있는 전국대상의 강우관소에 대한 확률강우량과 강원지역에 위치한 강우관측소만을 대상으로 산정한 확률강우량을 비교하였다. 이를 위해서 강원도 지역의 48개 지점의 지속기간별 강우자료를 수집한 후, K-means 기법을 이용하여 6개의 군집으로 구분하였다. 강원도 대부분이 산악지형임을 고려해 산악효과를 야기하는 지형인자와 강우자료의 관계를 파악하였다. 국가수자원관리종합정보시스템에서 수집한 강우자료를 사용하여 지속시간별 최대강우량과 산악효과를 야기하는 지형인자로 선정한 고도 이외에 위도, 경도를 각각 추가인자로 고려해 지역빈도분석을 수행하였다. 위 지형인자와 강우자료를 이용하여 수문학적 동질한 특성을 가지는 군집을 구성하였으며, 위도와 경도를 인자로 추가하면 더욱 강한 상관성을 보임을 알 수 있었다. 군집분석결과를 통해 모수를 추정하고 적절한 분포를 선택하였으며, 이상치검정과 적합도 검정을 통해 최종 분포를 결정하였다. 고도와 위도, 경도를 모두 고려해 이용한 지역빈도분석 결과 강원도의 실제 강우특성과 마찬가지로 고도의 높낮이에 따라 강우형태를 전국단위 지역빈도분석과 비교하였다. 최종적으로 현재 활용되고 있는 홍수량 산정 지침의 확률강우량과 강원지역에 위치한 강우관측소만을 대상으로 한 지역빈도분석의 차이의 발생원인과 강원지역에서의 특이성을 결론으로 제시하였다.