• Human Ecology Research
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• 제56권5호
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• pp.435-446
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• 2018

This study investigated relationships between primary caregivers' life satisfaction and abuse mediated by children's life satisfaction. We included term panel data for 3 years (2013-2015) from the 4th year to the 6th year of 2,067 children in the first grade of elementary school of the Korean Youth and Youth Panel(KCYPS)(2015); in addition, three years' longitudinal panel data (2013-2015) were analyzed utilizing SPSS 18.0 and AMOS 22.0 to measure Latent Growth Model(LGM) term relationships between variables. Analysis results were as follows. First, the life satisfaction of the primary caregiver, the life satisfaction of the child, and abuse gradually decreased from the fourth grade to the sixth grade. Second, the initial status of primary caregivers' life satisfaction influenced the initial status of the children's life satisfaction, and the initial status and change in the abuse rate. Third, the rate of change of life satisfaction of the primary caregiver did not have a significant effect on the change in the abuse rate and the rate of change of life satisfaction of the child. The initial value of the life satisfaction of the child played a partial mediating role in the relationship between the initial value of the life satisfaction of the primary caregiver, initial value of the abuse, and abuse change rate. The results suggest that a program to improve the life satisfaction of the 4th grade elementary school should be developed and applied.

• 비교교육연구
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• 제27권1호
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• pp.77-96
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• 2017

본 연구는 아시아의 개발도상국가인 캄보디아의 열악한 교육 문제를 해결하기 위한 근간으로서 초등교육 환경과 교사 쟁점을 분석하고 제 발전 방향을 탐색하는데 목적이 있다. 이를 위해 캄보디아의 초등교육 환경과 그 특성은 무엇인지 분석하고, 교육 개혁을 이끄는 주체로서 '교사'에 주목하면서 캄보디아 초등교사 양성 제도 및 교사의 자격 수준의 제 실태를 고찰하였다. 그 결과 캄보디아 초등교육 환경 특성과 쟁점에서는 여전히 열악한 교육 여건과 질적으로 낮은 교육접근성 문제를 파악하였고, 교사의 낮은 역량 및 교육의 질 저하, 그리고 초등교사의 현직 연수 시스템 취약 문제를 분석하였다. 그리하여 교육의 질을 향상시키기 위한 다양한 방향 탐색이 제안되었다.

• 한국융합학회논문지
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• 제9권12호
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• pp.195-205
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• 2018

인터넷전문은행의 안정적인 구축과 성장을 위하여 인터넷전문은행의 지각된 위험, 지각된 혜택과 신뢰가 지속적 이용의도에 미치는 영향에 대해 파악하였다. 그리고 지각된 혜택, 지각된 위험과 지속적 이용의도의 관계에서 신뢰의 매개효과를 검증하였다. 온라인 설문조사를 통하여 최근 3개월 이내에 인터넷전문은행 이용경험이 있는 20-59세 457명이 연구대상자로 선정되었다. 주요 결과로 첫째, 지각된 혜택과 위험, 신뢰는 인터넷전문은행의 지속적 이용의도에 유의한 영향을 미치는 것으로 밝혀졌다. 둘째, 편이성과 기능적 위험은 지속적 이용의도간의 관계에서 신뢰의 부분매개효과가 검증되었으며, 매력성과 혁신성은 완전매개효과로 검증되었다. 인터넷전문은행은 지속적인 성장을 확보하기 위해 소비자의 주요 혜택을 늘리고 위험수준을 낮추어 신뢰를 견고하게 구축해 나가야 한다.

• 대한소아치과학회지
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• 제50권1호
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• pp.113-120
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• 2023

모든 유치에 알맞은 색조의 복합레진을 수복하는 것은 소아치과 의사에게 큰 어려움이다. 최근 개발된 단일 색조 복합레진은 구조색 현상을 기반으로 주변 치질과 유사한 색상을 나타낼 수 있다. 이 연구는 단일 색조 복합레진의 유치에서의 색조 적응력(Color adjustment potential, CAP)을 일반적인 다색조 복합레진과 비교하여 평가하기 위한 연구이다. 한 개의 단일 색조 복합레진과 두 개의 다색조 복합레진이 연구에 포함되었다. Single, dual 두 종류의 표본이 제작되어 평가되었다. Single 표본은 실험군 레진을 이용하여 제2유구치 인공치를 복제하여 제작하였다. Dual 표본은 발거된 제2유구치 협면에 와동을 형성한 뒤 실험군 레진을 수복하여 제작하였다. 측색계를 이용하여 발거된 치아 및 제작된 표본의 L^*, a^*, b^* 값을 측정하였다. Single, dual 표본에 대한 ΔE_ab^* 값과 CAP 값의 평균을 계산하였으며 Bonferroni 사후 분석을 이용하여 실험군 레진 간의 통계적 유의성을 확인하였다. 실험 결과 단일 색조 복합레진이 다른 복합레진들에 비해 유의하게 큰 ΔE_Single 값을 나타내었다(p < 0.0167). 모든 실험군 레진 간 유의한 ΔE_Dual 값의 차이는 관찰되지 않았다. 단일 색조 복합레진은 다른 다색조 복합레진들과 비교 시 가장 높은 CAP 값을 나타내었다. 단일 색조 복합레진은 제2유구치에서 다른 다색조 복합레진에 비해 준수한 색조 적응력을 나타내었다. 단일 색조 복합레진은 제2유구치에서 색조 선택 과정을 단순화하면서 심미적인 수복물을 제공할 수 있을 것이다.

• 대한지구과학교육학회지
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• 제7권1호
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• pp.99-109
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• 2014

The purpose of this study was to obtain consensus from the expert community on the aims of Elementary Science Classes for the Gifted(ESCG) and teaching professionalism of Elementary Science Teachers for the Gifted(ESTG). For the delphi study, nineteen experts were consulted with open-ended and closed questions. Delphi research was conducted a total of 3 times. The Delphi survey was done by e-mail. The experts can express their opinions freely during the research. The results of this study were as follows : First, there were six aims for ESCG. The six aims of ESCG are scientific inquiry ability growth, creative problem solving ability growth, primary science gifted's giftedness development, the future science-talented-children training, the growth of attitudes toward science, scientific attitudes growth. Second, there were four teaching professionalism about teaching professionalism of ESTG. Four teaching professionalism are understanding the characteristics of primary science gifted, the ability to understand and apply the learning methods suitable for primary science gifted education, professional knowledge and ability to understand the science curriculum, the ability to develop and apply primary science education programs.

• 한국생활과학회지
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• 제20권3호
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• pp.533-544
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• 2011

The purpose of this study was to investigate the effect of different types of leisure activities' on the satisfaction and psychological well-being of primary school students. The subjects of this study consisted of 467(boys=191, girls=276) primary school students. The data was analyzed by one way ANOVA, factor analysis, Chi-square analysis, correlation analysis and multi-regression analysis. The main findings of this were as follows: first, there were statistically significant differences in the kinds of activities participated in according to gender. Second, among of the subscale of leisure satisfaction, boys showed higher scores in more education and physical satisfaction than girls, and in the subscale of psychological well-being, boys indicated a higher score in flow and happiness than girls. Third, there were significant differences in leisure satisfaction and psychological well-being in the types of leisure activity. Fourth, the participation motivation of leisure activity statistically influenced psychological well-being. Fifth, leisure satisfaction partially influenced on psychological well-being. Social and environmental satisfaction significantly influenced flow. Education and social satisfaction significantly influenced happiness and psychological well-being.

• 성인간호학회지
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• 제21권2호
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• pp.187-198
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• 2009

Purpose: This study was to compare and examine the factors influencing burden of primary family caregivers according to the severity of illness of elderly patients admitted in an intensive care unit. Methods: Subjects were the families of elderly patients in intensive care units of K, S and Y hospitals in Seoul. Data were collected from March to October 2007. Subjects were 108 persons over age 65. Data were analyzed by SAS statistics. Results: First, groups 5 and 3 showed higher burden than that of group 4. Second, high correlation was found between stress and burden, stress and anxiety, and burden and anxiety. Third, factors influencing family burden were found to be stress for group 5, stress, anxiety, and monthly income for group 4, and stress and patient age for group 3. Conclusion: Specific nursing interventions to decrease the stress of primary family caregivers of serious ill elderly patients in an intensive care unit are needed. Additionally, more effective and systematic activation of a long-term medical insurance system for seriously ill seniors is considered necessary to mediate the burden of primary family caregivers.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권3호
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• pp.1313-1336
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• 2020

Cognitive radio (CR) is regarded as an effective approach to avoid the inefficient use of spectrum. However, CRNs have more special security problems compared with the traditional wireless communication systems due to its open and dynamic characteristics. Primary user emulation attack (PUEA) is a common method which can hinder secondary users (SUs) from accessing the spectrum by transmitting signals who has the similar characteristics of the primary users' (PUs) signals, and then the SUs' quality of service (QoS) cannot be guaranteed. To handle this issue, we first design a multiple-phase energy detection scheme based on the cooperation of multiple SUs to detect the PUEA more precisely. Second, a joint SUs scheduling and power allocation scheme is proposed to maximize the weighted effective capacity of multiple SUs with a constraint of the average interference to the PU. The simulation results show that the proposed method can effectively improve the effective capacity of the secondary users compared with the traditional overlay scheme which cannot be aware of the existence of PUEA. Also the good delay QoS guarantee for the secondary users is provided.

• Tribology and Lubricants
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• 제11권5호
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• pp.136-143
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• 1995

The effect of additive chemistry on the serface fatigue of gears was investigated using the FZG gear tester and fluids based on an API GL-5 grade oil. Surface fatigue lives were determined as a function of load and additive chemistry. At 1.52 GPa, the removal of the primary extreme pressure additive (EP) from the fully formulated gear oil decreased the fatigue life of gears slightly (4%), however, the removal of the primary antiwear additive (AW) decreased the fatigue life of gears significantly (83%). At 1.86 GPa, the removal of the EP additive from the fully formulated gear oil decresed the gear fatigue life 27%, however, the removal of the primary AW additive decreased the fatigue life of gears significantly (75%). Micropitting was the dominant surface morphology in the dedendum of gears tested With two oils at load stage: one using the complete additive package, and a second where the EP additive has been removed. However, spalling is the primary failure mode of gears tested without an AW additive independent of whether an EP agent was present. Surface analysis of pinion gears showed the formation of a mixed phosphate/phosphite-oxide layer on the surface of gears tested with fluids containing an AW. Formation of this layer seems to be key to long fatigue life.

• 디지털산업정보학회논문지
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• 제9권4호
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• pp.51-57
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• 2013

Research on calibration of array antenna has become a hot spot in the area of signal processing and it is necessary to obtain the phase mismatch of each antenna channel. This paper presents a new calibration method for an array antenna system. In order to calibrate the phase mismatch of each antenna channel, we used primary synchronization signal (PSS) which exists in LTE downlink frame. Primary synchronization signal (PSS) is based on a Zadoff-Chu sequence which has a good correlation characteristic. By using correlation calculation, we can extract primary synchronization signal (PSS). After extracting primary synchronization signal (PSS), we use it to calibrate and reduce the phase errors of each antenna channel. In order to verify the new array antenna calibration algorithm which is proposed in this paper, we have simulated the proposed algorithm by using MATLAB. The array antenna system consists of two antenna elements. The phase mismatch of first antenna and second antenna is calculated accurately by proposed algorithm in the experiment test. Theory analysis and MATLAB simulation results are shown to verify the calibration algorithm.