• Journal of the korean academy of Pediatric Dentistry
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• v.32 no.2
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• pp.293-299
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• 2005

It is important to reduce chair time and procedure in restorative treatment for children. Composite resin is not only used in esthetic restoration of anterior teeth but also posterior teeth by its improved physical property. The 7th generation dentin bonding system was recently developed in order to simplify three steps which is needed to bond composite resin to tooth surface-etchant, primer, adhesive. We compared shear bond strengths of 4, 5, 6, 7th generations dentin bonding systems. The primary dentin was pretreated with 4, 5, 6, 7th generation dentin bonding systems. Then composite resin was cured to the specimen using molds 2.5mm in diameter and 2mm in height. Thermocycling was performed and shear bond strength was finally measured. The results were as follow; 1. The mean values of shear bond strengths in 5th generation dentin bonding system(group 2) were greater than those of 4, 6, 7th generation dentin bonding system(group 1, 3, 4). The differences were statistically significant. 2. The mean values of shear bond strengths in 4th generation dentin bonding system(group 2) were greater than those of 6, 7th generation dentin bonding system(group 1, 3, 4). But, the differences were not statistically significant. 3. Between the mean values of shear bond strengths in 6, 7th generation dentin bonding system(group 3, 4) were similar.

• 한국노년학
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• v.39 no.4
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• pp.825-846
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• 2019

This study aims to identify subgroups of ageism among young adults of age 20-39, and to examine its relationship to perceptions of generational conflict and elderly welfare policy. Latent Profile Analysis(LPA) was applied on the data 'Survey on Age Integration and Generational Integration', which was executed by institute for Age Integration Researchof Ewha Womans university, and descriptive statistics and cross-tabulation analysis were performed to examine the socio-demographic characteristics of each subgroup. Then, regression analysis was performed to observe the effect of the subgroups on the perceptions of generational conflict and elderly welfare policy. The results are as follows. The resulting subgroups of ageism among young adults were 'compound perception on aging and active age discrimination', 'medium-level aging anxiety and passive age discrimination', and 'low-level aging anxiety and beyond age discrimination'. Subgroups of ageism affected both perceptions of generational conflict and elderly welfare policy, whereas social support only affected perception of elderly welfare policy. Based on the results, political implications, such as activation of education on perception on aging, expansion of generational exchange for age integration, and renewal of social atmosphere for intergenerational coexistence, which will promote social integration

• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.620-629
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• 2019

In this study, we expected the perceived difference of job calling and decent jobs between recent generation and baby-boomer and eco baby-boomer generation. Understanding perceptions of jobs by current generation that are perceived as lifetime jobs rather than lifetime workplace will make some valuable contributions to future job research and policy. The aim of the study was to examine the subjective perception of decent jobs among university students who are ready to go to labor market. By using Q methodology, we extracted 291 Q statements and 47 Q samples. In addition, 31 subjects classified Q samples into Q distributed tables. We used Ken-Q Analysis program. In the results, we found five types of perceived subjectiveness on the decent jobs, which were interests-seeking, balance-seeking, toward organization, power-seeking, and career development. These results confirm the diversity of perceptions of decent jobs. Then, we suggested policy implications to help the labor market entry based on the results.

• Korea journal of population studies
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• v.31 no.1
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• pp.75-97
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• 2008

Recently Korea is expected with the decrease of population in working ages and also population structure, especially age structure, has changed as aging goes faster. This study focuses on the relationship between age structure and wage structure to analyzes the cohort size effect on the change of age-earnings profile. Our empirical analysis based on Wright(1991)'s model takes weighted OLS regression using the male worker's data of Ministry of Labor 'Wage Structure Survey'($1990{\sim}2006$). In pooled data, we take the conclusion that the cohort size effect was found in high school and college graduate workers, but the effect is different between them. The labor market entry effect of high school graduate workers is negative(-) and his persistent effect is positive(+). On the other hand, the cohort size effect of college graduate workers have appeared the opposite directions in contrary with the existing results of Welch(1979) and Wright(1991). This results are seen as the possibility that college graduate worker has the benefit of wage level by his relative cohort size in spite of high unemployment of young graduate. It will be the sign of need that we should interest in the change of age structure with balancing the labor supply side approach and the demand side study which the previous studies was mainly tended to focus on.

• Journal of Family Resource Management and Policy Review
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• v.27 no.1
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• pp.1-12
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• 2023

This study forecasts the outlook 10 years from now regarding domestic labor and caregiving by the Baby Boomer generation and the preparations needed in the context of the Fourth Industrial Revolution. The scenario-planning method was used to explore changing trends in domestic labor and caregiving, the rationale for which has been questioned by both seniors and family welfare experts. Based on the results of the survey and our researchers' opinions, it was concluded that the changing trends were caused by two factors: the probability of alterations in domestic labor and the strength of family relationships. On the basis of these conclusions, four scenarios regarding baby boomers' domestic labor and caregiving in 10 years were proposed using two axes: the "high and low probability of alterations" and the "strengthening and weakening of family relationships." The first scenario is a "preference for the self-caring form of family," which has a high probability of domestic labor alterations and weak family relationships. The second scenario is a "preference for the flexible form of family," which has a high probability of domestic labor alterations and strong family relationships. The third scenario is a "preference for the traditional form of family," which has a low probability of domestic labor alterations and strong family relationships. The fourth scenario is a "preference for the public caregiving form of family," which has a low probability of domestic labor alterations and weak family relationships. These results provide basic information about the various aspects of baby boomers' lives-including the development of various goods and services, the establishment of policies regarding seniors, and programs for successful aging-and can help equip our society to take the actions needed for a super-aged population.

• Korean Journal of Culture and Social Issue
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• v.29 no.4
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• pp.429-453
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• 2023

Due to recent demographic changes, employees from diverse generations now work together in organizations. Thus, there is a need for research on intergenerational cooperation. However, the lack of valid and reliable measures to capture intergenerational climate in the workplace is an obstacle to research. Therefore, we translated the Workplace Intergenerational Climate Scale(WICS) into Korean and validated it with a sample of 1,052 Korean full-time employees. Firstly, we conducted an exploratory factor analysis by using sample 1(N = 460) and revealed a five-factor solution. Secondly, the confirmatory factor analysis(sample 2; N = 592) showed a good model fit of the correlated five-factor model. Thirdly, the scale's discriminant and convergent validity was supported by negative correlations with four types of existing ageism scales and by positive correlations with trust, organizational commitment, work engagement, psychological safety, intention to remain, job satisfaction, and communication satisfaction. Moreover, it further demonstrated significant incremental validity in predicting positive outcome variables even when controlling for pre-existing agism scales. Lastly, we confirmed strict measurement invariance of the scale between the age groups(below 40 versus above 40). The findings support the reliability and validity of the Korean version of WICS among Korean employees. The scale will be broadly applied to measure intergenerational climate of organizations and provide practical implications for HR management.

• 한국노년학
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• v.36 no.3
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• pp.827-846
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• 2016

The presented study was based on the notions that 1)the age-separated perspective would not be functional for post modern society which characterized by a diversity of life styles and 2)effects of wage peak system have been investigated mainly through managemental efficiency with quantitative analysis. In those notions, this study aimed to investigate effects of wage peak system based on age integration perspective with a qualitative method. Deep case study were executed with four workers who fully understand regarding wage peak system. Results showed that three sub categories were drawn in the meaning focused on issues of wage peak system; uneasy attention on workers who applied for wage peak system; pro and con of wage peak system for aged workers; achieving age integrated environment through mutual understanding.

• Nuclear industry
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• v.19 no.6 s.196
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• pp.42-47
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• 1999

원자력발전소의 안전성분분석보고서(SAR) 작성시 이용되어온 USNRC의 RG 1.70을 참고로 하고, 신형 원자로와 관련된 최신의 규제 정보와 차세대 원자로의 설계 특성에 근거하여, 차세대 원자로 표준 설계용 SAR 작성 지침(안)을 개발하였다. 개발된 지침(안)은 RG 1.70에 비해 상당히 많은 추가적인 안전 설계 정보를 제시하도록 구성하였으므로, 이 지침을 표준 설계에 대한 안전성 심사에 이용할 때 효율적이고 일관성 있는 안전성 판단을 할 수 있고, 이에 근거하여 향후 통합 허가(COL)용 SAR 작성 지침을 쉽게 개발할 수 있을 것으로 기대된다. 또한 일부 산업 기술 기준의 준용을 제외하고는 국산화를 실현함으로써 우리 고유의 지침 역할을 할 수 있게 되었다. 본 연구를 통해 개발된 지침(안)의 객관성과 일관성을 보장하기 위하여 향후전문가 검토가 수행될 예정이며, 검토 의견을 반영하여 내용을 보완한 후 차세대 원자로 표준 설계의 인$\cdot$허가 심사에 활용될 예정이다.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.257-265
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• 2006

다양한 정보기기들의 복합화 형태로 진화하는 차세대 텔레매틱스 시스템에서는 운전자의 안정성 확보와 workload 감소가 중요한 이슈로 대두되어 Interface의 단순화, GUI Interaction의 극복 등의 대한 문제해결이 중요시 되고 있다. 이를 위해 본 연구에서는 사용자의 mental model를 고려한 운전자의 자유로운 navigation을 지원할 eyes-free 기술인 haptic interface를 지원하는 모델 개발을 목표로 기존 haptic interface를 지원하는 기기들의 문제점을 도출하고 차세대 텔레매틱스 시스템의 분석을 통해 기능적 요구사항을 정의하였다. 이를 기반으로 사용자에게 haptic interface를 통한 interaction을 제공함으로써 차세대 텔레매틱스 시스템을 지원하는 conceptual model을 개발하였다. 또한 haptic device design시에 고려되는 평가지표들을 선별하여 평가지표의 계층적 구조도를 작성한 후 AHP평가 모델을 개발하여 haptic device design 시의 중요 고려사항을 도출하고 중요도를 산정하여 초기 design 단계에서의 prototype에 대한 객관적이고 정량적인 평가를 제공하였다.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.97-100
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• 2004

유비쿼터스 컴퓨팅 환경에서의 차세대 PC는 다양한 입출력 장치를 이용하여 사용자에게 효과적으로 실제와 같은 정보를 제공하며, 사용자들의 편의를 고려해 웨어러블 형태의 플랫폼으로 발전하고 있다. 이러한 사용자 편의를 고려한 기술개발 동향(소형화, 경량화, 착용화)에 발맞추어 웨어러블 컴퓨팅 환경에서의 HCI 방안으로 음성 인식과 합성은 주요한 자리매김을 하고 있다. 본 논문에서는, 현재 정부에서 국가적인 차원으로 연구 개발 중인 차세대 PC 플랫폼 기반에서 음성합성 엔진을 구현하며, 구현상의 문제점 파악 및 개선사항에 대해 제안한다. 또한, 실질적인 구현 결과를 토대로 사용자 편의성 및 S/W 개발 환경을 고러한 차세대 PC플랫폼의 개선사항에 대해 제안을 한다.