• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2010년도 춘계학술대회 논문집
• /
• pp.913-914
• /
• 2010

• 한국복합재료학회:학술대회논문집
• /
• 한국복합재료학회 2004년도 추계학술발표대회 논문집
• /
• pp.167-170
• /
• 2004

In order to investigate the impact behaviors of 3-D braided glass/epoxy composites, the energy profiles and damage area were compared to the laminates of similar volume fraction and composition. The energy profiles showed different characteristics from each other which indicates they have distict energy absorption mechanisms. The image analysis on the damage projections visualized the crack propagation paths along the fiber direction.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 1999년도 추계학술대회 논문집
• /
• pp.526-533
• /
• 1999

Tn this study, the crashworthy design of the full rake of KHST (Korean High Speed Train under development in G7-project) is numerically evaluated using 2-dimensional crash dynamics. The results of KHST are compared with those of TGV-K (TGV for Seoul-Pusan line). KHST shows better crashworthy behaviors after impact. Specifically, impact forces, decelerations and overriding displacements are much reduced in KHST All the design guidelines under SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 km/h) are satisfied in KHST.

• 한국지역사회생활과학회지
• /
• 제17권3호
• /
• pp.29-41
• /
• 2006

The purpose of this research is to study the causal model among mother related variables, child abuse, and children's emotional maladjustment behaviors. The sample subjects were 542 pairs of fifth and sixth grade elementary school students and first as well as eighth grade middle school students, and their mothers. The major findings of the research are as follows: First, the result of multiple regression analysis on the effects of the maternal parenting stress and marital satisfaction to the children's abuse indicates that stress related to learning expectation and stress related to relationship with child are the significant contributing factor to physical abuse and verbal abuse. Second, the result of multiple regression analysis on the effects of the maternal parenting stress and child abuse to the children's emotional maladjustment behaviors indicate that verbal abuse is the significant contributing factor. Third, looking at causal relations of the maternal variables (maternal parenting stress, marital satisfaction) and child abuse (physical abuse, verbal abuse, neglect) to the children's emotional maladjustment behaviors, maternal variables impact indirectly through the child abuse factor.

• 한국생활과학회지
• /
• 제23권6호
• /
• pp.1141-1154
• /
• 2014

The purpose of this study examined the moderating effect of maternal emotion-related socialization behaviors on the relations between preschooler's effortful control and prosocial behavior. In this study, subjects were 153 preschoolers and their mothers. The major results were as follows; there was a moderating effect of maternal emotion-related socialization behaviors on the relationship between preschooler's effortful control and prosocial behavior. Specifically, maternal negative emotion expression and response to the preschooler's positive emotion moderated the effect preschooler's effortful control on prosocial behavior. In conclusion, the impact of effortful control on preschooler's prosocial behavior were significant. Also, maternal emotion-related socialization behaviors(i.e., negative emotion expression and response to the child's positive emotion) affected on preschooler's prosocial behavior. The findings of the study will contribute to help maternal emotional interaction with their preschool aged children.

• 보건의료산업학회지
• /
• 제14권1호
• /
• pp.161-176
• /
• 2020

Objectives: The purpose of this study was to investigate the effects of health status and health behaviors on health-related quality of life in Korean adults. Methods: The study was based on the 2017 National Health and Nutrition Survey. Of the total 8,127 people, 5,780 (71.1%) participated: 2,553 (44.2%) were male and 3,227 (55.8%) were female. The variables for this study were demographic factors, disease count, subjective health status, health behaviors, and health-related quality of life (measured by the EQ-5D Index). Results: After analysis, the statistically significant factors associated with health-related quality of life were gender, age, income, education, daytime health status, number of comorbidities (6 or more) and stress. Conclusions: Seven demographic factors have been identified as having a significant impact on health-related quality of life, categorized by model, gender, age and income. Therefore, it is possible that quality of life can be improved through proactive management and by improving subjective health status and health behaviors while in considering of demographic and sociological factors by providing indicators as per gender and age.

• 동아시아식생활학회지
• /
• 제24권6호
• /
• pp.906-914
• /
• 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.

• Child Health Nursing Research
• /
• 제13권4호
• /
• pp.467-477
• /
• 2007

Purpose: To identify the effects of a training program on the knowledge of, attitudes towards child infection, and infection prevention behaviors in staff of daycare centers. Methods: A nonequivalent control group pretest-posttest design study was conducted with 34 staff of 6 daycare centers over 3 months. The staff in the 3 centers designated as the experimental centers received the training program weekly for 8 weeks. The program included on-site education for one and half hours and monitoring of infection prevention behaviors. Knowledge and attitudes of the staff were measured, and their infection prevention behaviors were observed and recorded by research assistants before and after the program. $X^2$-test, t-test, Fisher's exact test, and Mann-Whitney U-test with SPSS Win program were used to analyze the data. Results: The group of staff who received the training program recorded higher scores in knowledge, attitudes, and their infection prevention behaviors compared with staff in the control group. Conclusion: This finding suggests that the training program had a significant impact on knowledge, attitude, and infection prevention behaviors of staff which could prevent child infection in daycare centers. Nurses need to be involved in daycare centers for the health of the children, and they could intervene effectively in child infections by using this program.

• 융합경영연구
• /
• 제9권4호
• /
• pp.19-30
• /
• 2021

Purpose: This study aimed to examine how a superior employee's ethical leadership affects members' innovative behaviors, mainly on organization-based self-esteem. It also aimed to verify the mediating effect of organization-based self-esteem in the process that ethical leadership affects members' innovative behavior in distribution-related organizations. Research design, data and methodology: After collecting materials from companies' executives and staff members in distribution-related organizations located in Seoul, South Korea, a research hypothesis was analyzed. Results: A superior employee's ethical leadership affects a positive (+) effect on innovative behaviors of the organization's members and the study confirmed that the relation of this effect was mediated by organization-based self-esteem. It means that the possibility that an organization's members will do innovative behaviors will be increased if a leader conducts ethical leadership. It also means that a leader with ethical leadership enables an organization's members to pay attention all the time and be awake for their work environment. Conclusions: The result of this study discusses how ethical leadership affects innovative behaviors of an organization's members from the perspective of organization-based self-esteem and has a theoretical implication that it has empirically examined it. More importantly, it has a theoretical implication because it verified how this effect was made using organization-based selfesteem and flexible human resource management.

• Structural Engineering and Mechanics
• /
• 제62권3호
• /
• pp.373-380
• /
• 2017

Concrete structures are often subjected to long-term static and short-term dynamic loads. Due to a relatively low tensile strength and energy dissipating characteristics, the impact resistance of concrete is considered poor. This study investigates the feasibility of using polypropylene fibers to improve the impact resistance of reinforced concrete slabs. Fourteen polypropylene fiber reinforced concrete slabs were fabricated and tested using a drop weight test. The effects of slab thickness, fiber volume fractions, and impact energy on the dynamic behaviors were evaluated mainly in terms of impact resistant, crack patterns, and failure modes. The post impact induced strains versus time responses were obtained for all slabs. The results showed that adding the polypropylene fiber at a dosage of 0.90% by volume of concrete leads to significant improvement in the overall structural behavior of the slabs and their resistance to impact loading. Interestingly, the enhancement in the behavior of the slabs using a higher fiber dosage of 1.2% was not as good as achieved with 0.90%.