• 대기
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• 제16권1호
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• pp.49-53
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• 2006

The present study has examined interdecadal variations of the diurnal temperature range (DTR, daily maximum temperature minus daily minimum temperature) during the New Year season in Seoul for the period 1954-2005. Here, the average DTR for the New Year holidays (three consecutive days; one day before the New Year, the New Year day, and one day after the New Year) minus the average DTR for 14 days, 7 days before and 7 days after the New Year holidays, is defined for representing the New Year effect. The DTR index does not show notable trend until the late 1970s but shows obvious positive values afterward. For example, the difference of the average DTR between two periods (1980-2005 minus 1954-1979) is $0.65^{\circ}C$, which is meaningful at the 95% confidence level. This result demonstrates that intense human activity even for the limited period may provide climate impact in local regions. Its plausible causes are discussed.

• 농업과학연구
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• 제48권1호
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• pp.83-93
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• 2021

The 52-hour workweek policy in Korea is a system that limits the maximum working hours per week to 52 hours including holiday work, which has been treated separately from overtime work during a week. Although this policy is designed to improve the quality of life and create jobs, it may also reduce the income of some workers. In general, it can be assumed that reduced working hours increase consumption at home. This study analyzed the effect of the 52-hour work policy on meat consumption patterns with the ordered logit model. Major factors considered in this study include working hours, income, and consumption frequency. It distinguished domestic and workplace consumption. The results show that the policy has had an impact on meat consumption patterns both at home and at work. If there is no change in income and only the working hours decrease, meat consumption in households increases. On the other hand, if both income and working hours decrease, household meat consumption decreases. Moreover, reduced working hours decrease the frequency of office happy hour and meat consumption in the workplace. However, the 52-hour workweek policy applies only to workers working more than 52 hours per week; thus, it is difficult to determine the overall effect of the policy on national meat consumption patterns.

• 응용통계연구
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• 제11권2호
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• pp.335-350
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• 1998

X11ARIMA는 1965년 미국 센서스국에서 개발된 X11분석 방법에 기초한 시계열 분석방법으로 Dagum(1975)에 의해 개발되었다. 이 기법은 Dagum(1988)에 의하여 북미지역의 174개의 경제지수를 바탕으로 일부 기본모형이 수정·보완되어 오늘날에 이르고 있다. 최근에는 회귀 모형과 ARIMA모형을 동시에 고려하여 특이치와 추세 변환효과(outlier arid Trend-change effects), 계절변동(seasonal effect), 그리고 달력효과(calendal effect) 등을 추정한 William 등(1995)과 Chen과 Findley(1995)의 X12ARIMA분석 방법이 소개되었다. 그러나 위의 모든 기법들은 주로 북미지역의 경제지수를 기초로 하고 있다. 본 논문에서는 우리나라의 산업중분류에서 산출되는 102개(생산(27), 출하(27), 재고(27), 가동률(21))의 지수에 대한 우리나라의 표준 ARIMA모형을 제시하고, 우리나라에 적합한 이동평균항수를 제공하고자 한다. 그리고 우리나라의 설, 추석 등의 명절효과를 태양력으로 전환함과 동시에, 최근에 논의되고 있는 X12ARIMA에서 사용되는 회귀모형과 ARIMA모형을 동시에 고려하는 명절효과를 도출하고자 한다.

• 농촌지도와개발
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• 제24권4호
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• pp.249-264
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• 2017

Modeling the consumer demand of fresh meat requires its distinct feature which other types of food product does not have. Most of the fresh meat products are likely to be unbranded, bought on a weight basis and affected by macro shocks such as seasonality, holiday effect and the disease incidence. Furthermore, consumers tend to purchase multiple categories of fresh meat in a week. Therefore, we apply a multiple discrete/continuous model on fresh meat consumption data to study the effect of macro shocks on fresh meat sales as well as of price change. As a result shows, Each fresh meat is relatively more likely to be bought in peak season of each fresh meat compared with imported pork which is set as a 'reference category' in this analysis. For clarity of the effect of disease incidence, we perform further analysis regarding the effect of livestock disease on fresh meat purchase probability. It shows that the avian flu in 2014 has strong negative impact on the purchase probability of chicken and the foot-and-mouth disease has negative impact on the purchase probability of pork and beef for part of outbreak periods.

• 보건교육건강증진학회지
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• 제23권3호
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• pp.121-134
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• 2006

Objectives: This study was conducted to analyze the general properties of beauticians and to analyze correlation between their experiences of indigestion and relevant factors and thus to provide basic data to prevent obstacles to beautician's health. Methods: A self-administered survey on 257 female beauticians in Daegu from March 15 to May 30, 2005 was conducted. Cross-link analysis was used to examine indigestion in relation to the general properties of beauticians, and correlation analysis was used to determine the level of relationship between indigestion and relevant factors, and multiple regression analysis was used to determine the degree of effects of relevant factors on indigestion. Results: The results can be summarized as follows: 1. As for indigestion by general properties and beauty-related properties, there were significant differences in gender(p<0.01), age(p<0.05) and marriage status(p<0.05) among general properties and there were significant differences in the number of holiday(p<0.05), beauty culture career(p<0.01), and the degree of satisfaction on duty(p<0.001) among beauty-related properties. As for indigestion by eating habit and health-related properties, there were significant differences in the degrees of regular eating(p<0.001) and regular living habit(p<0.001), and eating speed(p<0.01). 2. Factors relevant to the eating habit showing significant correlation with indigestion were regular eating habit, taking well-balanced nutrition, and taking salty food. Among them, the regular eating habit was shown to be the most relevant with the correlation coefficient of -0.253(p<0.01). The general and beauty-related factors showing significant correlation with indigestion were beauty culture career, number of holiday, and regular living habit. And regular living habit was shown to be the most relevant with the correlation coefficient of -0.260(p<0.001). 3. Results from the regression analysis showed that relevant factors having significant effects on indigestion were gender, beauty culture career, satisfaction on duty, eating speed, regular eating habit and regular living habit. And satisfaction on duty was found to have the greatest effect on indigestion. Conclusions: The findings of this study could be effectively used to develop a practical management strategy to prevent $beauticia{\acute{n}}s$ indigestion, and to promote $beauticia{\acute{n}}s$ health, and ultimately to improve the $beauticia{\acute{n}}s$ quality of life.

• 유통과학연구
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• 제14권7호
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• pp.63-70
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• 2016

Purpose - The purpose of this study was to examine the variations in emotions during vacation and to explore if such variations depend on psychological distance perceived by vacationers. We proposed that there are changes in affect balance during the course of vacation as well as the mental construal of psychological distance. Research Design, Data, and Methodology - Repeated measures ANOVA was used to examine the variation in emotion and psychological distance of 66 holiday makers who were traveling to different destination for vacation. Data were collected in 2 months with the help of a travel agency. Results - We find that there are variations in emotions during the vacation at different points in time as well as perceived psychological distance. Also we find some evidence that suggests emotional happiness does depend on perceived mental distance to some extent. Conclusion - Our study replicates the findings of previous studies in a novel way and illustrates the robustness of the nature of emotions during vacation and indicates certain time points where the happiness of vacationers can be enhanced. Perceived psychological distance do have an effect on how happy an individual feels during the vacation.

• 응용통계연구
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• 제22권5호
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• pp.1019-1032
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• 2009

도시가스 수요량은 강한 계절성을 보이는 자료이다. 따라서 도시가스 수요량을 예측하기 위한 모형 구축에서 가장 중요한 요인은 계절성이다. 또한, 실제 도시가스 수요량에는 추가적 인 여러 요인들에 의하여 영향을 받을 수 있는데, 온도, 요일효과, 명절효과, 유효일 수, 수용가수 등이 영향 요인들이다. 본 연구에서는 이와 같은 요인들이 도시가스 수요량에 미치는 영향력의 정도를 파악하고 효율적으로 향후 도시가스 수요량 예측을 위한 시계열 모형을 구축하였다. 적용된 모형은 오차항이 자기상관을 따르는 시계열 회귀모형을 이용하였으며 실제 자료를 이용한 예측결과 매우 우수한 예측력을 보였다.

• 한국컴퓨터정보학회논문지
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• 제27권11호
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• pp.271-276
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• 2022

기업이나 조직은 원하는 성과를 도출하기 위하여 종업들이 요구하는 부분이나 필요한 부분의 제공 등 동기부여가 될 수 있는 요인들을 제공하지 않거나 충족시키지 못하는 상황에서 성과를 달성하기 위해 다양한 경영기법과 제도를 도입함으로써 종업원들의 심적·육체적 부담을 주고 있다. 이러한 상황이 장기적으로 이어질 경우 발생하는 것이 직무소진이라고 할 수 있다. 직무소진은 오늘날과 같이 기업이나 조직이 생존을 위해 시행하는 새로운 경영기법 및 신기술을 바탕으로 한 생산량의 증대와 이를 달성하기 위한 잔업, 휴일 근무 등을 통한 과도한 업무요구량 달성 등 이 장기간에 노출되어 육체적·정서적·정신적으로 고갈되어 가는 상태라고 정의되고 있다. 따라서 본 연구는 정신적 괴롭힘과 업무 관련 괴롭힘이 직무소진과 직무몰입에 어떠한 영향을 주며 이들은 어떻게 이직의도에 영향을 주는지에 대해 알아보았다. 그 결과 직장 내 괴롭힘은 직무소진에 긍정적인 영향을 주고 이는 이직의도에도 직접적인 영향을 주므로 치과의원의 경우 우수한 인재의 이직을 막기 위해서는 직장내 괴롭힘과 직무소진에 많은 노력을 기울여야 할 것으로 판단된다.

• 한국관광식음료학회:학술대회논문집
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• 한국관광식음료학회 2005년도 학술논문발표집
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• pp.1-20
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• 2005

패밀리 레스토랑은 서비스 산업이라 해도 과언이 아니다. 서비스 운영자 혹은 서비스 제공자의 역할은 고객과의 접촉순간(MOT : Moment Of Truth)에 고객의 요구 및 욕구를 충족시켜 고객에게 제공하는 가치를 극대화하여 서비스 상품의 판매 향상을 도모하고자 하는 것이다. 향후 패밀리 레스토랑은 하드웨어(hard ware)측면보다 내적으로 어떤 서비스를 질적으로 나타낼 수 있느냐 하는 소프트웨어(soft ware)가 더욱 강조될 추세이다. 따라서 본 연구의 목적은 패밀리레스토랑 종사원들의 직무만족이 서비스품질에 어떠한 영향을 미치는지 연구하고자 하는 것이다. 본 연구의 대상은 대구전역에 위치하고 있는 패밀리 레스토랑에 근무하는 종사원을 연구대상으로 하였다. 조사기간은 2004년 4월 1일부터 5월 20일까지 50일간에 걸쳐 실시하였다. 실증분석 결과, 본 연구에서 제시한 7개의 가설 가운데 4개가 유의한 것으로 검증되었다.

• 유통과학연구
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• 제14권4호
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• pp.47-53
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• 2016

Purpose - The objective of this study is to investigate the dynamic relationships among Advertising Cost (AD), Newly Registered Users(NRU), and Buying Users(BU) of Social Network Game(SNG). SNG is getting pervasive mainly due to the rapid growth of mobile game and Social Network Service(SNS). It would be helpful for marketing researchers interested in SNG and related practitioners to understand the changes in AD, NRU, and BU with time as well as the effects on one another in mutual and dynamic way. Research Design, Data, and Methodology - Necessary data were collected from Social Network Game(SNG) company. AD, NRU, and BU are endogenous variables, but new event such as launching (event) and holidays(holiday) are exogenous dummy variables. Vector Auto regression (VAR) model is generally used to examine and capture the dynamic relationships among endogenous variables. VAR model can easily capture dynamic and endogenous relationships among time-series variables. Vector Auto regression with Exogenous variables(VARX) is a model in which exogenous variables are added to VAR. To investigate this study, VARX is applied. Result - By estimating the VARX model, the author finds that the past periods' NRU affect negatively and significantly the present AD, and past periods' BU have a positive and significant impact on the increase of AD. In addition, the author shows that the past periods' AD and BU have a positive and significant effect on the increase of NRU, and the past periods' AD affect positively and significantly BU. While the impact of AD on NRU happens after 3 or 4 days (carryover effect), that of AD on BU comes about within just 1 or 2 days (immediate effect). The effect of BU on NRU can be considered as word of mouth (WOM effect). Therefore, SNG companies can obtain not only the growth of revenue but also the increase of NRU by increasing BU. Through those results, the author can also find that there are significant interactions between endogenous variables. Conclusion - This study intends to investigate endogenous and dynamic relationships between AD, NRU, and BU. They also give managerial implications to practitioners for SNS and SNG firms. Through this study, it is found that there exist significant interactions and dynamic relationships between those three endogenous variables. The results of this study can have meaningful implications for practitioners and researchers of SNG. This research is unique in that it deals with "actual" field data and intend to find "actual" relationships among variables unlike other related existing studies which intend to investigate psychological factors affecting the intention of game usage and the intention of purchasing game items. This study is also meaningful by showing that the increase of BU can be a good strategy for "killing birds with one stone" (i.e., revenue growth and NRU increase). Although there are some limitations related with future research topics, this research contributes to the current research on SNG marketing in the above mentioned ways.