• The Korean Journal of Health Service Management
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• v.9 no.4
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• pp.51-62
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• 2015

Objectives : Identify the factors that affect organizational citizenship behavior of hospital nurses, and to provide a basis for developing an effective nursing workforce management system. Methods : Participants of this study were 214 nurses serving at general hospitals located in B Metropolitan City. Data collection was performed from Oct.15th to 25th, 2014. The methods of analyzing data were ANOVA, Scheffe's-Test, Pearson's Correlation Coefficient Analysis and the Stepwise Multiple Regression Analysis according to the SPSS WIN 18.0 Program. Results : Emotional intelligence explained 42.1% of the subjects' organizational citizenship behaviors. This figure increased to 48.7, 51.3 and 52.3%, respectively when other three factors of job satisfaction, age and educational background were added on a one-by-one basis. Conclusions : Considering that emotional intelligence is a critical factor in organizational citizenship behaviors, general hospitals should develop and implement education and training programs that can raise their nurses' emotional intelligence and job satisfaction and, concomitantly, promote their organizational citizenship behaviors provided that feedbacks is provided later.

• Journal of the Korean Dietetic Association
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• v.21 no.1
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• pp.57-71
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• 2015

This study assessed gender differences of 'solo eating' perceptions and dietary behaviors among college students residing in Seoul and Kyongki province. Two types of questionnaires were used to analyze perception and dietary behaviors of subjects: a cross-sectional survey (N=893) and AGA (Associative Group Analysis; N=50). Women ate significantly more and intook a greater variety of foods when eating together (P<0.05). Men, on the other hand, showed no difference in these variables. Women, compared to men, spent more time eating both alone and together (P<0.001). In the associative group analysis (AGA), women showed a different semantic value for 'solo eating' compared to men. Women also tended to feel lonely when they ate alone and had positive images of eating together. Students began to decide their own dietary behaviors after junior and high school. Dietary lives of Koreans have rapidly changed along with social changes over the past half century. These research findings will contribute to more comprehensive and efficient nutrition education programs for preventing lifestyle-related diseases in the early stage of adulthood.

• Journal of the East Asian Society of Dietary Life
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• v.24 no.6
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• pp.906-914
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• 2014

This study conducted an exploratory factor analysis to examine how consumers' confidence on the local foods used at tasty farm eateries influence their purchase behaviors. The four factors of perception of local foods used at tasty farm eateries and the factors of consumer confidence and purchase behaviors were extracted for a reliability analysis, correlation analysis of variables, and simple and multiple regression analysis. The following are the findings: first, among the four factors of perception of local foods used at tasty farm eateries, safety, sociality and product value had statistically significant influences on consumer confidence, whereas regional economic value did not. In other words, safety referring to the nutritional value and sanitary safety of food ingredients used for the native foods at the tasty farm eateries, product value referring to the characteristics differentiated from general Korean cuisine, and sociality referring to the various related experiences for the interests in farm culture and local food, leads to consumer confidence, whereas regional economic value referring to farm household income, local job creation, and development of farm tourism does not. Second, consumer confidence had a statistically significant positive impact on consumers' purchase behaviors. Among the five principles of local foods, reliability is the most important factor. When consumers gain confidence on local food items and are satisfied with them, they make additional purchases and revisits. Therefore, confidence is a very important aspect for the loyalty and sustainability of business.

• Research in Community and Public Health Nursing
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• v.28 no.2
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• pp.173-181
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• 2017

Purpose: Early sexual intercourse is associated with poor health outcomes in adolescents. It is known that sexual intercourse coincides with other health risk behaviors such as smoking, drinking, and using drugs. The purpose of this study is to identify the relationships between sexual intercourse and health risk behaviors among Korean and US adolescents using nationally representative data. Methods: Data were collected from the 2011 Korea Youth Risk Behavior Web-based Survey (29,676 students) and 2011 Youth Risk Behavior Surveillance System (10,135 high school students). Logistic regression analysis was performed. Results: In Korea, students who had sexual intercourse accounted for 7.0% in total. Among these, 9.7% were male and 4.2% were female students. In the US, a total of 51.3% students had sexual intercourse, and the proportion of the US male (49.3%) and female (53.4%) students who had sexual intercourse was similar. Korean and US students who experienced sexual intercourse were more likely to smoke, drink alcohol, and use drugs. Conclusion: Since the results of this study show the relationships between sexual intercourse and health risk behaviors, it is necessary to develop comprehensive sex education programs with effective strategies to reduce health risk behaviors in adolescents.

• Journal of Labour Economics
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• v.38 no.3
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• pp.97-130
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• 2015

This paper examines effects of the Korean Student Human Rights Ordinance on student behavior. The ordinance was put into effect in some municipalities (Seoul, Kyongki, Kwanju, Jonbuk) from 2010. Since the ordinance prohibits corporal punishment and other authoritative treatments of students in school, the paper estimates effects of indulgent teaching on student behaviors. Our difference-in-differences estimates suggest that the ordinance has little effect on the students' propensity to behave, intimacy with classmates and teachers and overall satisfaction with school life. In contrast, the ordinance increases the likelihood of students, especially low-performing and mid-performing students suffering from problem behaviors of other students. This implies that some (probably low-performing and mid-performing) students tend to commit more problem behaviors after the ordinance has taken effect.

• International Journal of Control, Automation, and Systems
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• v.1 no.1
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• pp.142-148
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• 2003

Reinforcement learning is considered as an important tool for robotic learning in unknown/uncertain environments. In this paper, we propose an evaluation function expressed in a vector form to realize multi-dimensional reinforcement learning. The novel feature of the proposed method is that learning one behavior induces parallel learning of other behaviors though the objectives of each behavior are different. In brief, all behaviors watch other behaviors from a critical point of view. Therefore, in the proposed method, there is cross-criticism and parallel learning that make the multi-dimensional learning process more efficient. By ap-plying the proposed learning method, we carried out multi-dimensional evaluation (reward) and multi-dimensional learning simultaneously in one trial. A special neural network (Q-net), in which the weights and the output are represented by vectors, is proposed to realize a critic net-work for Q-learning. The proposed learning method is applied for behavior planning of mobile robots.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2002.05a
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• pp.143-149
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• 2002

Ball reducer with waved grooves has many advantages over other reducers for the high-reduction ratios, low noise and low energy loss, etc. The mechanism of force transmission is very similar to that of cam and follower in automobile valve train system especially in the contact geometry. In this study, we have investigated the traces of contact between ball and outer race and the working behaviors with a certain reduction ratio. In order to verify the contact behaviors between ball and outer race, which determines the critical endurance life the contact velocity and load are computed for a cycle. During some period of a cycle, the contact velocity reverses its direction very suddenly, which causes undesirable endurance performance of this machinery. From the computational investigation in this work, we hope to predict similar contact damages in other machinery due to this kind of contact behaviors, which is very common in many contact phenomena.

• Journal of Ocean Engineering and Technology
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• v.28 no.1
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• pp.12-19
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• 2014

Tsunamis are ocean waves generated by movements of the Earth's crust. Several geophysical events can lead to this kind of catastrophe: earthquakes, landslides, volcanic eruptions, and other mechanisms such as underwater explosions. Most of the damage associated with tsunamis are related to their run-up onto the shoreline. Therefore, effectively predicting the run-up process is an important aspect of any seismic sea wave mitigation effort. In this paper, a numerical simulation of the behaviors of a floating body near a quaywall during a tsunami is conducted by using a particle method. First, a solitary wave traveling over shallow water with a slope is numerically simulated, and the results are compared with experiments and other numerical results. Then, the behaviors of floating bodies with different drafts are investigated numerically.

• Nutritional Sciences
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• v.5 no.3
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• pp.146-154
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• 2002

The aim of this study was to investigate the effects of household type on the health- and food-related behavior of the elderly. The survey was conducted on 304 free-living elderly persons in Chun-Chon city in 1999. The subjects were divided into three groups by their household types : living alone (n=35), living with their spouses (n=59), and living with their extended family (n=191). The results were obtained by personal interviews using questionnaires. Compared to the group living with their spouses and/or extended families, the elderly living alone were : less satisfied with the amount of monthly pocket money available; less involved in social activities; taking less vitamin supplements; doing less physical exercise; more frequently skipping meals and dining out; less frequently consuming meats, vegetables, fruits and seaweed; and having the highest rate of depression. The elderly living with their spouses tended to have the best physical functions and the greatest ability to carry out basic daily activities. The elderly living with their extended families had a higher incidence of diseases compared to the other groups. The preferred snacks were cookies for the elderly living alone, and fruits for the other two groups. In summary, it has been shown that household type should be taken into consideration for formulating adequate future strategies for effective health and nutrition programs.

• Nuclear Engineering and Technology
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• v.52 no.3
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• pp.520-529
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• 2020

Experimental investigations were attempted to simultaneously observe the vapor behaviors and critical heat flux under static and rolling conditions. From visualization results, vapor initiated, grew, and detached individually in a vertical direction from the static heated surfaces (at 10, 20, and 30°). While under rolling motion, initiated vapor grew, and interacted with each other, resulting in forming a wider dry spot on the heated surface. Also, it was observed that the vapor drifted upward and stayed on the heated surface longer compared to under static condition. The faster the platform rolls, the longer the vapor stay on the heated surface, significantly decreasing the CHF. On the other hand, as the platform rolls slower (at high rolling period), CHF increases. CHF was decreased with increasing maximum rolling amplitude and inclination angle under both conditions (static and rolling). CHF under rolling conditions was noticed to be lower than under static condition except at maximum rolling amplitude of 10°. The bubble departure frequency at a maximum rolling amplitude of 10° was the highest among all of rolling amplitudes, thereby enhancing the CHF. These results indicate that rolling motion significantly affects vapor behaviors and CHF.