• 가정∙방문간호학회지
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• 제20권1호
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• pp.16-23
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• 2013

Purpose: The purpose of this study was to analyze the relationship between cognitive function, self-esteem, and depression among patients in long-term care hospitals. Methods: The study participants were 159 patients from 2 long-term care hospitals in Kyungki province. Data were collected from January 2 to February 5, 2013, by conducting across-sectional descriptive survey using a structured questionnaire administered by researchers. Results: Cognitive function and depression were significantly different according to age, education level and marriage. Self-esteem was significantly different according to education level and economic status. Self-esteem was significantly positively correlated with cognitive function, which in contrast showed a significant negative correlation with depression. Among our subjects, those older than 80 years showed low cognitive function and those with low educational attainment showed high scores of depression. Conclusion: We conclude that, elderly patients in long-term care hospitals who have low educational attainment should be carefully monitored, especially by nurses, for cognitive function and depression. In addition, nurses should have constant communication with their patients. Moreover, long-term care hospitals should apply early detection of and a management system for cognitive impairment and depression among their patients.

• 아태비즈니스연구
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• 제14권1호
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• pp.73-91
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• 2023

Purpose - The purpose of this study is to re-examine the disclosure effect of stock splits and long-term performance after stock splits using stock split data over the past 10 years, and infer the motivation (signal or opportunism) of stock splits. In addition, we focus on exploring the determinants of the short- and long-term market response to stock splits. Design/methodology/approach - We measure the short-term market response to a stock split and the long-term stock performance after the stock split announcement using the event study method. We analyze whether there is a difference in the long-term and short-term market response to a stock split according to various company characteristics through univariate analysis and regression analysis. Findings - In the case of the entire sample, a statistically significant positive excess return is observed on the stock split announcement date, and the excess return during the 24-month holding period after the stock split do not show a difference from zero. In particular, the difference between short-term and long-term returns on stock splits is larger in companies with a large stock split ratio, small companies, large growth potential, and companies with a combination of financial events after a stock split. Research implications or Originality - The results of this study suggest that at least the signal hypothesis for a stock split does not hold in the Korean stock market. On the other hand, it suggests that there is a possibility that a stock split can be abused by the manager's opportunistic motive, and that this opportunism can be discriminated depending on the size of the stock split, corporate characteristics, and financing plan.

• 한국농공학회논문집
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• 제53권6호
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• pp.121-128
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• 2011

Long-term water treatment performance analysis was conducted for the constructed wetland treating agricultural tailwater. Studied wetland was established in 2001 and operated from June, 2002 to November, 2010. Wetland vegetation cover was shown over 90 % coverage after 2005. According to vegetation development, accumulation of sediment nutrient was observed; Organic Carbon, T-P and T-N. In addition, DO concentration and temperature was decreased in the constructed wetland output. An infiltration rate also significantly decreased due to compaction of wetland soil. A runoff coefficient was increased due to the low infiltration rate after 2005. A T-N, TSS and Chl.a removal rate was maintained constantly. However, the T-P removal rate was slightly decreased along to wetland operation because low DO concentration could increase elution of phosphorus from sediment. After constructing open water, the T-P removal rate was increased. This is because open water could accelerate the reaearation process. Consequently, over three years of vegetation development could be helpful for wetland performance. In addition, DO concentration is important factor to maintain the T-P treatment.

• Communications for Statistical Applications and Methods
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• 제13권3호
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• pp.479-490
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• 2006

Francis Gallon (1822-1911) introduced the term 'regression' and 'correlation' in the study on human inheritance of the stature from parents to their children. In almost every statistics textbook, superficial attentions have been given to him just as the inventor of the term 'regression'. Rereading his books and papers, we investigated problems he had tried to solve and the methods he had used to solve the problems. In addition, we tried to find the motivation that had led Gallon to take attention to the variation rather than the central tendency of observational data that had fascinated his forerunner Adloph Quetelet.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.271-274
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• 2005

Under competitive power markets, various long-term and short-term contracts based on spot price are used by producers and consumers. So an accurate forecasting for spot price allow market participants to develop bidding strategies in order to maximize their benefit. Artificial Neural Network is a powerful method in forecasting problem. In this paper we used Radial Basis Function(RBF) network to forecast spot price. To learn ANN, in addition to price history, we used some other effective inputs such as load level, fuel price, generation and transmission facilities situation. Results indicate that this forecasting method is accurate and useful.

• 산업융합연구
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• 제5권1호
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• pp.103-119
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• 2007

It is very important for the logistics business success that Third-Party Provider maintains a successful logistical relationship with customers. The important factors for the successful logistical relationship are customer orientation, service timeliness, reciprocal dependability, keeping long-term relationships, and logistics cost savings. Therefore, Third-Party Provider establishes the logistics strategy based on the reciprocal dependability with customers and the long-term of view. In addition, the logistics strategy provides the logistics services satisfying customers and saving logistics cost.

• 한국직업건강간호학회지
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• 제21권3호
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• pp.308-316
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• 2012

Purpose: The purpose of this study was to describe the perception and practice of hospital infection control of nursing staff in long-term care hospitals by the level of supplementation of nurses. Methods: The participants were 212 nurses and nurse assistants in 13 long-term care hospitals in a metropolitan city and the data were gathered by self-reported questionnaires during August 2011 and analyzed by SPSS/WIN program. Results: The beds per a nurse were 15, and the proportion of nurses among nursing staff in long-term care hospitals was about 33%. In general, the level of infection control in practice was lower than that of perception. The highest perception and practice domain was 'Management of disinfection/contamination', and the lower level domains were 'Personal hygiene' and 'Hand washing' There were statistically significant differences in the hospital infection control of perception and practice depending on age, education, career in long-term care hospital, job position, the quantity of beds, nurse, and nurse assistant, beds per a nurse and proportion of nurses in hospitals. Conclusion: According to these results, the systematic and continual education on hospital infection control of the nursing staff in long-term hospitals should be carried out. In addition, the policy to add more nurses into long-term care hospitals must be implemented.

• Asian Pacific Journal of Cancer Prevention
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• 제16권4호
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• pp.1415-1420
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• 2015

Background: We compared the health-promoting behavior of long-term cancer survivors with those of the general population to identify necessary behavioral interventions to reduce the health risk among cancer patients. Materials and Methods: We used data from the 2007 and 2012 Korea National Health and Nutrition Examination Surveys (KNHANES IV [2007~2009] and KNHANES V [2010~2012]) on smoking status, alcohol use, physical exercise, and disease screening. We compared long-term cancer survivors with members of the general population; the controls were matched by propensity score matching. A multiple logistic regression model was used to investigate the association between cancer status and health-promoting behavior. Results: Long-term cancer survivors had a lower risk of smoking than the general population controls (OR: 0.42, 95%CI: 0.25-0.71). In addition, the long-term cancer survivors had a lower risk of alcohol use than the general population controls (OR: 0.70, 95%CI: 0.50-0.98). However, in terms of physical exercise and disease screening, no statistically significant differences were detected (physical exercise OR: 1.01, 95%CI: 0.75-1.35; disease screening OR: 1.27, 95%CI: 0.93-1.74). All covariates were adjusted. Conclusions: The long-term cancer survivors had a much lower risk of smoking and alcohol use than the general population controls. However, almost no differences in physical exercise and screening for cancer recurrence or secondary disease were detected between the long-term cancer survivors and general population controls. To reduce the health risks and challenges facing long-term cancer survivors, interventions to encourage physical exercise and screening for cancer recurrence and secondary disease should be implemented.

• 실천공학교육논문지
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• 제12권1호
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• pp.93-100
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• 2020

현장실습의 양적 성장과 더불어 질적 향상을 위해 단기(4주) 및 중기현장실습(8주)의 비중을 낮추고 장기현장실습(12주이상)을 높이는 노력이 대학 현장에서 증가하는 추세이다. 단기 및 중기현장실습의 전공과 연계된 체계적이고 특화된 현장실습 교육커리큘럼 부재와 대학의 현장실습 참여도가 증가할수록 기업들은 현장실습 참여를 선호하지 않고 학생들은 전공수업 부담으로 장기현장실습 참여를 주저하는 문제점이 있다. 이를 해결하기 위해 본 논문에서는 기업의 애로문제를 현장실습 참여학생들이 현장실습 기간 동안 직접 해결하되 어려운 난제가 있을 경우 관련분야 전공교수의 도움으로 해결하는 기업애로해결형 현장실습 IPBP를 경북지역 K대 사례를 중심으로 제안한다. 참여기업과 win-win 현장실습 문화 구축을 위해서는 본 논문에서 제안한 기업애로해결형 현장실습 IPBP가 하나의 좋은 모형이라고 판단된다.

• Coupled systems mechanics
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• 제1권1호
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• pp.79-98
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• 2012

In the present paper, the three-dimensional model of a typical rectangular concrete tank is excited using an artificial and a natural three components earthquake ground motion and the staggered displacement method is utilized for solving the coupled problem of the tank-contained liquid system in time domain. In the proposed method, surface sloshing of the liquid is taken into account in addition to the impulsive term and the appropriate damping values are applied on both of them. The resulted responses are compared with those obtained from the ABAQUS finite element software. It is found that the convective term affects responses extensively and must be considered in seismic design/safety assessment of storage tanks. In addition, the utilized method for solving the coupled problem is stable during the conducted general dynamic analyses and is able to capture the expected phenomena.