• Journal of the korean academy of Pediatric Dentistry
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• v.23 no.2
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• pp.357-364
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• 1996

The purpose of this study was to asses the shear bond strengths of 3 types of light-curing Glass Ionomer cement to dental amalgam with or without an intermediary agent. 60 amalgam adherent specimens were prepared and aged in water at $37^{\circ}C$ for 3 days. Before bonding, the amalgam surfaces were finished flat on 600-grit silicon carbide paper. 30 specimens among 60 were used for bonding in this condition, and the other 30 were covered with a thin layer of light-curing intermediary agent. Shear bond strengths were measured with universal testing machine (Instron, Model 4301) and statistically processed by ANOVA and t-test. On completion of bond test, the fracture surfaces were examined under light microscope so that the mode of bond failure could be assessed The results were as follows : 1. Bond strength of Fuji II LC group showed the hightest value and was followed by Vitremer, Vitrebond groups (p<0.05). 2. The bond strengths achieved without an intermediary agent were higher than those obtained with intermediary agent (p<0.05). 3. For the specimens bonded with intermediary agent, bond failures occured mostly at the agent-amalgam interface. So, the use of intermediary bonding agent was thought not recommendable at glass ionomer-amalgam interface.

• Broadcasting and Media Magazine
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• v.1 no.1
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• pp.54-60
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• 1996

최근 영상 정보의 중요성에 따라 기존의 2차원적인 TV에서는 얻을 수 없는 입체감을 가지고 있어 현실감 있게 화상을 볼 수 있는 입체 TV 개발에 관한 관심이 높아지고 있다. 이에 본 논문에서는 특수안경을 사용하는 입체 TV 및 특수안경을 사용하지 않고도 입체감 있는 화상을 볼 수 있는 입체 TV 등 최근 세계적으로 활발히 연구되고 있는 각종 입체 TV 기술에 관해 소개하였다.

• Journal of Korean Home Economics Education Association
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• v.27 no.2
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• pp.121-135
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• 2015

The purpose of this study was to investigate the influence of temperament and stress coping strategies on adolescents' psychological well-being. Three hundred and ninety nine middle and high school students in Seoul participated in this study. Temperament, stress coping strategies, and psychological well-being were evaluated by self-report questionnaires. Data were analyzed using Cronbach's alpha, frequencies, percentiles, means, standard deviations, two-way ANOVAs, Pearson's correlations and hierarchical multiple regression analyses. The results were as follows: First, there were significant differences in psychological well-being as a function of gender and school levels. Second, temperament and stress coping strategies were related to psychological well-being in adolescents. In the sub factor of temperament, activity and persistency were positively associated with psychological well-being, whereas rigidity was negatively related to psychological well-being. Among stress coping strategies, problem-focused strategy was positively associated with psychological well-being, whereas emotion-discharge strategy and affective-regulation strategy were negatively related to psychological well-being. Third, hierarchical multiple regression revealed that problem-focused strategy and emotion-discharge strategy were influential factors in explaining the level of psychological well-being controlling for gender, school levels and temperament of the adolescents. These findings suggest that stress coping strategy should be considered to promote the level of psychological well-being of adolescents.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.221-228
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• 2013

The purpose of this study was to examine the effects of alcohol use, depression, and self-esteem on suicidal ideation of older adults. Community-dwelling older adults aged 65 years and older were recruited from three welfare centers. A total of 245 older adults was assessed with the Alcohol Use Disorder Identification Test-Korean (AUDIT-K), Geriatric Depression Scale Short Form-Korea Version (GDSSF-K), Self-Esteem Scale (SES), and Scale for Suicidal Ideation (SSI). Descriptive statistics, Pearson's correlation, independent t-test, one-way ANOVA, and multiple regression analysis were performed using the SPSS WIN 19.0 program. Higher depression, lower self-esteem, no religion, and poorly perceived health were statistically significant determinants of higher level of suicidal ideation in older adults. To prevent or reduce suicidal ideation of older adults, health care providers should consider the determinants identified in this study.

• The Journal of the Korea Contents Association
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• v.13 no.1
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• pp.164-174
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• 2013

Since the advent of smart phone, a variety of text-based media are developed and used as popular communication tools even in mobile phone environment. This study explores differences in terms of users' perceived social presence level across different text-based media, specifically KakaoTalk, Facebook, SMS. A survey was conducted using items adopted from previous studies on social presence. 203 data points were collected and used for analysis. Across the whole sample, KakaoTalk is perceived as the highest in terms of perceived social presence level, followed by Facebook and SMS. Also, the users with higher level of sociality tends to reveal higher level of perceived social presence across all the media while younger and/or student users tend to maintain higher level of social presence perception across all the media. Further studies seem necessary investigating features of specific medium that may increase or decrease the perceived level of social presence.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.341-346
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• 2019

This study analyzed the relationship between the personality factors in pre-service early childhood teachers and teacher efficacy. To carry out the research, this experiment subjected 228 pre-service early childhood teachers in G city. The collected data were descriptive methods, Pearson correlation analysis and multiple regression using the SPSS 22.0 program. The results of this study were as follows. First, there were significant positive relationships among the personality factors and teacher efficacy. Second, the personality factors was an important factor for predicting the teacher efficacy of pre-service early childhood teachers. Also, the explanation power of personality factors for teacher efficacy of pre-service early childhood teachers was 25%, extroversion is one of the most personality factors of infant pre-serve early childhood teacher. Therefore, according to this research, a preserves early childhood teacher training program for improvement of extraversion in personality factors is strongly desired.

• The Journal of the Korea Contents Association
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• v.10 no.8
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• pp.360-369
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• 2010

The objective of this research examines the relationships among privacy concerns, self discrepancy, and sense of virtual communities. According to the relevant literature review, we considered information privacy concerns factor as information collection, control, and awareness of privacy practice, and sense of community factor as membership and immersion on virtual communities. This research surveyed for the online community user and employed hierarchical regression model for the moderating effect test. The results of empirical analysis turns out that awareness of privacy concerns practice has negative impact on the self discrepancy, on the other hand, information collection and control factors do not affect. The next finding is internet use duration has moderating effect on the self discrepancy with information control and awareness of privacy concerns practice. The last findings are self discrepancy affect on the community membership and does not affect on the community immersion. It could be a good guide line for the operational direction on virtual community.

• Science of Emotion and Sensibility
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• v.9 no.4
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• pp.341-351
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• 2006

The effect of color evokes a certain feeling and affects behavior. Especially, an understanding and applying color are critical because well-designed color substantially contributes to quality and usability. In this study, the effects of three color components(hue, value, and chroma) on apparent warmth were investigated separately and relatively, and then feasibility of applying to the information display was examined. The result showed that the apparent warmth of 10 Hues was a U-shaped function declining from Red to Purple-Blue and increasing from Purple-Blue to Red-Purple with following order of color-circle. Chroma made the character of hues remarkably clear, so warm color becomes warmer and cool color becomes cooler if chroma gets higher. But value has no effect on warmth. These results propose that we can change the apparent warmth by varying chroma in the limitation of color use. And there was a sharp distinction between warm and cool color, Meanwhile, in the reading task of the graphical information, the subjects' judgment distortion overestimating or underestimating the actual degrees was ascertained. This result should be applied to control operator's sensitivity in accordance with the purpose of task and display.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.816-817
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• 2008

본 논문에서는 2세대 고온초전도 선재인 YBCO CC(Coated Conductor)를 사용하여 접합 없이 권선되는 새로운 형태의 고온초전도 팬케이크형 코일에 영구전류를 인가하기 위한 영구전류 스위치의 형태를 제안였다. 제안된 테이프 형태의 광폭 YBCO CC의 양끝부분을 제외한 중간부분을 2분할하여 감아 뒤집은 형태의 팬케이크 코일에는 접합부분이 없으므로 영구전류가 흐를 수 있으나, 전류의 인가를 위한 스위치를 별도로 제작하여 연결하기 곤란하다는 단점이 있다. 본 연구에서는 감아 뒤집은 고온초전도 팬케이크 코일의 한쪽 단부를 영구전류 스위치로 사용할 수 있는 구조를 제안하였고, 추후 연구에 실제로 사용될 12 mm 폭의 YBCO CC를 사용하여 영구전류 스위치를 제작하고 특성시험을 수행하였다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.245-250
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• 2001

화장품 사용 시 소비자가 가장 중요하게 느끼는 요인은 효과와 촉감이라고 볼 수 있다. 특히 반복적인 사용을 위해서 쾌적한 촉감은 필수 조건이다. 그런데, 촉감은 사용하는 사람 자신의 감각에 의존하는 것이므로, 이러한 화장품의 촉감을 포함하는 성능을 평가하기 위해서 사람에 의한 최종평가는 필수적인 단계이다. 따라서, 여러 특성의 강도를 측정하는 분석형 관능평가와 소비자의 선호도를 조사하는 기호형 관능평가의 필요성이 요구되며, 두 결과를 종합적으로 고려하는 것이 바람직할 것이다. 우리는 훈련된 전문패널에 의해 다양한 자외선차단 크림과 로션들에 대한 분석형 관능평가를 실시하였다. 그 결과, 자외선차단 제품의 관능속성 평가의 주요인은 잔여감 요인과 발림성 요인으로 나타났으며, 이 결과에 따라 제품들을 2차원 공간 상에 위치하였다. 이 중 몇 제품을 선택하여 20대 후반 여성소비자를 대상으로 기호형 관능평가를 실시하였다. 평상시 실제 화장단계에서 인지되는 자외선차단제품에 대한 용어들은 촉촉함 및 도포균일성 요인/흡수속도 요인의 두가지 요인으로 분류되었다. 이상적인 자외선차단제품의 사용감은 너무 촉촉하지도 매트하지도 않으면서, 흡수속도는 빠르고 화장밀림이나 번들거림이 적은 사용감을 나타내는 특성쪽으로 나타났다.