• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.519-524
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• 2003

In this paper we discuss the dynamic characteristics of the in-arm type hydropneumatic suspension unit(ISU). For this, two accurate models are introduced. The first one is the Benedict-Webb-Rubin equation which is adopted for the spring behavior of a real gas. This equation is applicable for the high pressure of the nitrogen gas which acts as a spring in ISU system. The second one describes the behavior of a damper, which is divided into four parts - jounce-loading, jounce-unloading, rebound-loading and rebound-unloading. This approach gives a good approximation of the real damper system. For the comparison purpose, the numerical results of the dynamic behavior of ISU system using a real gas and an ideal gas are given in the paper.

• 한국컴퓨터정보학회논문지
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• 제24권6호
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• pp.135-140
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• 2019

The purpose of this study was to find the ethical values of dental hygiene students, to establish the right ethical values of the students, and to provide a fundamental material for the ethical education direction and curriculum of the students. In order to examine the general characteristics and ethical job behavior level among dental hygiene students, a research was conducted from 1st April 2017 to $30^{th}$ June 2017 through selecting freshman, sophomore, junior and senior students currently enrolled in the department of dental hygiene at 5 different colleges as the subjects. Statistical analysis was performed using IBM SPSS 22. The frequency analysis was used to examine their general characteristics. The independent t-test was used to examine their ethical job behavior according to their religion, hospital practice experience and code of ethics as a dental hygienist, and the one-way ANOVA was used to examine their ethical job behavior according to grade-specific characteristics. Lastly, the Scheffe's post hoc test was conducted. The significance level was 0.05. Given the results, ethical job behavior was significantly different between the group of students with religion, the group of students with hospital practice experience, different school year students, and the group of students aware of code of ethics as a dental hygienist.

• 교육시설 논문지
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• 제21권6호
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• pp.43-54
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• 2014

This study focuses on analyzing children's behavior from an integrated systemic perspective of the space and time and presenting a criterion and a guide of children-centered environmental color for intensifying their behavior affordance while considering functions of the space and color. Research was conducted as follows. Based on the spatial function and children's behavior, it figured out a prerequisite of educational environmental colors for behavior affordance. It extracted colors by dividing children's behavior affordance into 8elements considering a psychology of expectation and color function according to spatial and behavior affordance intensification elements. So 97school colors were selected for children's behavior affordance from abstracted colors by each element. Furthermore, it planned to suggest an environmental color guide for establishing elementary school's positive educational circumstances through enhancing behavior affordance, providing a potential to change a color environment at the educational space.

• Tribology and Lubricants
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• 제15권4호
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• pp.343-353
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• 1999

The role of viscosity index improver's(Ⅶ) additives for modem engine lubrication is complex. Under the condition of atmosphere or low shear rate, the characteristics of Ⅶ added lubricant is verified and quoted frequently for mathematical model of lubricant behavior. However, recent research shows that added lubricant has the characteristics of shear thinning at high shear rate condition although it performs well enough over the whole range of working temperature. At high shear rate, they show significant decrease of apparent viscosity irrespective of temperature. Many experimental researches verify that Ⅶ added lubricant shows boundary film layer formation on the solid surface as well as shear thinning effect by its polymeric molecular characteristics. The intend of our research is to verify the effects of Ⅶ from the viewpoint of continuum mechanics, because conventional Reynolds'equation with only pressure-viscosity relation cannot fully predict the lubricant behavior under the Ⅶ added condition. In these aspects, Reynolds'equation of Newtonian fluid model lacks the reflection of real fluid behavior and there is no way to explain the non-linear characteristics of Ⅶ added lubricant. In this research, we mathematically modeled the Ⅶ added lubricant behaviors which are the characteristics of non-Newtonian fluid behavior at high shear rate and boundary film formation on the solid surface. The consideration of elastic deformation in the contact region is also included in our computation and finally the converged film pressure and the film thickness with elastic deformation are obtained. The results are compared with those of Newtonian fluid model.

• 대한가정학회지
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• 제38권1호
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• pp.9-23
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• 2000

This study was designed to test the differences in children's social information-processing patterns and bahavioral characteristics among four different groups of peer status, and to evaluate the predictability of peer status from social information-processing and social behavior. In addition, age and sex differences were assessed. The subjects were 80 boys and 80 girls identified as popular, average, neglected, and rejected by their peers in the first and the third grade. They responded to a sociometric test and three hypothetical social dilemmas, while behavioral characteristics were rated by their teachers. The data were analyzed by ANOVAs, and discriminant analyses. The results showed that children's social information-processing patterns were not significantly different by peer status except the number of interventions requested. Whereas children's behavioral characteristics were different by peer status in all of the four domains. Children's social information-processing patterns and behavioral characteristics were different in part by age and sex. The important predictors of peer status were hyperactive-distractive, anxious-withdrawn, sociable-prosocial behaviors, and the number of interventions requested.

• 보건의료산업학회지
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• 제7권2호
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• pp.93-100
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• 2013

This study sought to explore the relationships between health behavior, oral health behavior and community periodontal index away the adult in korea. The date of 'The fifth korean national health and nutrition examination survey 2010' was analyzed for this study. The questionnaire was measured regarding health behavior, oral health behavior, community periodontal index and socio-economic characteristics. For statistical analysis, the SPSS 19.0 for Windows was used. We determined frequencies, percentage and determining statistical significance using multiple regression analysis. General characteristics showed differences in community periodontal index associated with residence, gender, age, income level, education, division of basic livelihood security. Health behavior showed differences in community periodontal index associated with smoking, AUDIT. Oral health behaviors showed differences in community periodontal index associated with dental care treatment, utilization of dental hospitals, dental check up, tooth brushing, use oral health supplies. In conclusion, in order to reduce community periodontal index of the adult, the importance and needs of periodontal status should be emphasized. periodontal status related education and program for the adult should be operated.

• 가정과삶의질연구
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• 제27권4호
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• pp.161-175
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• 2009

This study examines how parenting behavior and abuse experience in childhood and temperaments affect problem behavior by sex as it relates to undergraduates. The subject of this research is 220 undergraduates (males, 94; females, 126) attending universities located in Gyeonggi-do. Data were collected through the use of questionnaires during class. According to the results, when parenting behavior experienced in childhood is negative, abuse experience is more frequent, the emotional characteristics of the subject's temperaments are negative, activity is higher, sociability is lower, and problem behaviors such as social withdrawal, hyperactivity, aggressiveness, and obsession are more prevalent. Moreover, for male students, the chief factors explaining their problem behavior are their father's lack of supervision, physical violence, their mother's excessive interference and irrational parenting behavior, and the temperaments of excessive worrying, high activity, and low sociability. In the cases of female students, the primary variables affecting their problem behavior are negative emotional temperaments, low sociability temperaments, their father's low affection, excessive interference, too rational explanation, and their mother's inconsistent parenting behavior.

• 한국의류산업학회지
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• 제12권1호
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• pp.46-59
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• 2010

This study is a survey research for adult men in their from 20's to 50's. The purpose of this study is to find out that demographic characteristic, material knowledge, and purchase price have what effect on the selection behavior and the post-purchase satisfaction. The results are as follows. The purchase place according to demographic characteristic showed the significant difference in ages, monthly income, and occupation. The purchase amount per a dress suit and the having quantity of dress suits showed the significant difference according to all demographic characteristics. The importance of an selective criteria in case of selecting dress suits showed the partly significant difference according to demographic characteristics. The post-purchase satisfaction showed the no significant difference according to demographic characteristics, but showed the significant difference according to the knowledge degree for materials and purchase amounts. The interaction effect among demographic characteristics, the degree of knowledge for materials, and the purchase amount showed frequently the significant difference between two variables. The factor which have most greatly an effect on post-purchase satisfaction of menswear was the degree of knowledge for materials.

• 한국의류학회지
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• 제23권3호
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• pp.361-372
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• 1999

The main objectives of this study were to investigate the characteristics of clothing buying behavior under the refund policy of stores (CCBBURPS) and the influence variables on CCBBURPS and to build the model of CCBBURPS. Additionally frequency and reasons for refund were researched. The interviews with 26 subjects the reviews of previous studies and the empirical investigation were processed for the study. The data was collected from 163 Korean females living in U.S. and analyzed by frequency mean factor analysis {{{{ chi ^2 }}-test, t-test and regression. The following results were found : the easyness of decision making (EDM) the loyalty of refund policy store (LRPS) and the increase of buying (IB) were found as the characteristics of clothing buying behaviors under the refund policy. EDM, LRPS and IB were influenced by clothing attitudes-shopping involvement and perceived buying risk-. The frequency of refund with 10 purchases was usually 0~1 times(38.7%) or 1~2 times (38.7%) The reasons for refund were : size unflattering appearance design com\ulcorner. The model of CCBBURPS was built based on the above findings(fig. 1)

• 아동학회지
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• 제22권3호
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• pp.229-239
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• 2001

This study investigated the relations among children's strategies in peer conflict situations, social behavior and children's peer acceptance. Eighty-seven kindergarteners were asked about their strategies in response to 8 hypothetical peer conflict situations. Classroom teachers completed the social behavior rating scale to evaluate children's behavioral characteristics. Children's peer acceptance was measured by peer acceptance rating scale. Results indicated that children's strategies for responding to peer conflicts and their social behavior correlated with peer acceptance, although the linkages were different for boys and girls. Furthermore, children's strategies correlated with their social behavior.