• 한국보육지원학회지
• /
• 제17권5호
• /
• pp.43-61
• /
• 2021

Objective: This study aimed to examine the sequential mediating effects of children's perceived maternal acceptance and peer acceptance in the relationship between maternal warmth and first grade children's school adjustment. Methods: Participants in this study were 979 seven-year-old children(498 boys, 481 girls) recruited for the Korea Child Panel Study. Data were analyzed by analyzing descriptive statistics, correlations, and significance of serial mediation pathways using SPSS 18.0 and PROCESS Macro 3.4. Results: Maternal warmth at age five effected perception of maternal acceptance at age six. Perceived maternal acceptance at age six effected perceived peer acceptance at age six. Perceived peer acceptance at age six effected school adjustment at age seven. Lastly, perceived maternal acceptance and peer acceptance at age six had a serial mediation effect between maternal warmth at age five and school adjustment at age seven. Conclusion/Implications: Perceived social acceptance during preschool years should be emphasized in order to promote school adjustment for first grade children. Parent education for promoting better parent child relationships should be considered and teachers should encourage peer play interaction to help children perceive acceptance from their peers.

• BMB Reports
• /
• 제56권10호
• /
• pp.537-544
• /
• 2023

The share of the population that is aging is growing rapidly. In an aging society, technologies and interventions that delay the aging process are of great interest. Dietary restriction (DR) is the most reproducible and effective nutritional intervention tested to date for delaying the aging process and prolonging the health span in animal models. Preventive effects of DR on age-related diseases have also been reported in human. In addition, highly conserved signaling pathways from small animal models to human mediate the effects of DR. Recent evidence has shown that the immune system is closely related to the effects of DR, and functions as a major mechanism of DR in healthy aging. This review discusses the effects of DR in delaying aging and preventing age-related diseases in animal, including human, and introduces the molecular mechanisms that mediate these effects. In addition, it reports scientific findings on the relationship between the immune system and DR-induced longevity. The review highlights the role of immunity as a potential mediator of the effects of DR on longevity, and provides insights into healthy aging in human.

• Journal of Ecology and Environment
• /
• 제32권2호
• /
• pp.109-113
• /
• 2009

Tree-ring width analysis has been used to assess the effects of air pollution on tree growth around industrial complexes. Our study was conducted to elucidate the effect of air pollutants on annual ring growth in black pines (Pinus thunbergii) of age 41$\sim$48 years around Ulsan Metropolitan City. The growth data were analyzed by multiple regression and the results are as follows: 1. The annual ring increment of black pines increased with tree age until age 40 years and then decreased gradually after age 40 years. 2. The increment of annual ring width of black pines was affected more by precipitation and evapotranspiration than air temperature. An annual ring decline appeared in the years 1968$\sim$1983, when annual ring indices below zero were observed. Decreased annual ring growth during this period may have been due to air pollution. 3. The heavy metal with the strongest effect on annual ring growth of black pines in the experimental stand was lead (Pb). The concentration of lead in the stand was estimated as over 6 ppm. 4. The technique of tree-ring width analysis may be useful for estimation of the extent of pollution in forest areas near industrial complexes.

• Asian-Australasian Journal of Animal Sciences
• /
• 제14권5호
• /
• pp.608-614
• /
• 2001

The effects of castration on growth and body composition of Javan rusa (Cervus timorensis russa) stags were examined at three slaughter ages in three experiments. Castration had no effects on growth rates, or liveweights at periodic weighings, at any stage in Experiments 1 and 2, when the stags were slaughtered at 19 and 13 months of age, respectively. In Experiment 3, monthly liveweights of castrated and entire stags were not significantly different until the stags were 21 months old. From this age, when they had recovered from their first rut season and were in their second spring/early summer, the entires grew more rapidly than the castrates. There were seasonal changes in growth in both treatments, indicating that pasture conditions influenced performance. Liveweights of entires and castrates were similar in stags slaughtered at 13 and 19 months, but castrates were smaller than entires at 25 months. Castration reduced the size of the head and skin, but there was little important effect of castration on body components at any slaughter age. Castration can be recommended as a management tool for rusa stags, especially if the animals are to be slaughtered before they exceed 19 months of age.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 1998년도 봄 학술발표회논문집(II)
• /
• pp.531-537
• /
• 1998

Recently, the pile driving or blasting works are increasingly done in many areas to perform large scale construction projects. The vibrations from these blasting works may affect the properties of concrete, especially young concrete. The purpose of present study is to explore the effects of vibration at early ages on the properties of concrete. To this end, comprehensive experimental study is conducted in the present study. The major test variables are peak particle velocity or vibration velocity and the age at vibration. The compressive strengths and bond strengths are measured for all the specimens at 28days after casting. The duration of vibration is fixed to 30 minutes for all cases. The results indicate that the strength increases for vibration velocity less than about 0.25cm/sec and decreases for vibration velocity larger than 0.5cm/sec. The effect of age at vibration is not pronounced and shows almost similar behavior for the age at vibration of 0 to 12 hours range. The present study provides some important guidelines to control the construction or vehicle vibrations for the concrete at very early ages.

• 아동학회지
• /
• 제36권6호
• /
• pp.147-164
• /
• 2015

The purpose of the present study was to examine the trajectories of children's negative emotionality and mother's social parenting over a 3-year period (for children at ages 1-3) and to then analyze the bidirectional effects between the two variables. The longitudinal casual relationship among children's negative emotionality, mother's social parenting and peer interaction at age 3 was also examined. The data, taken from the Panel Study on Korean Children, were analyzed using latent growth modeling. The results were as follows. First, the level of negative emotionality was seen to have increased by 2 years of age, whereas the level of mother's social parenting decreased by this point. Second, higher initial negative emotionality predicted decreases in mother's social parenting, However, higher initial mother's social parenting predicted increases in children's negative emotionality. The initial level and slope of mothers' positive parenting predicted peer interaction at age 3, while only the slope of negative emotionality predicted peer interaction. These findings suggest that temperament and parenting predict changes in each other and peer interaction.

• International Journal of Human Ecology
• /
• 제7권2호
• /
• pp.85-95
• /
• 2006

The purpose of this study was to examine mothers' ideal and actual parenting behaviors toward their infants in three parenting domains; social, didactic, and limit setting. A total of 264 mothers of young children under age three from Seoul, Korea completed Parental Style Questionnaires (PSQ). Mothers' self report on their ideal and actual parenting were explored as a function of child sex, age, and birth order. As expected, there were significant differences between mothers' ideal and actual behaviors in all three parenting domains: Mothers' ideal behaviors such as social interaction, didactic interaction and limit setting were higher than those of their actual behaviors. For mothers' ideal parenting, results revealed neither significant main effects nor interaction effects. However, the Parenting Domain x Birth-Order 2-way interaction and the Parenting Domain x Child Age 2-way interaction were significant for mothers' actual behaviors. Specifically, mothers reported more social and didactic behaviors with their first-born than later born children, but not for limit setting behavior. It was also found that higher limit setting behaviors were apparent for their 2- and 3-year-old than 1-year old children whereas lower social interactions were found for 3-year-old than for 1-year-old. In light of universality and uniqueness, mothers' parenting behavior toward young children has been discussed.

• 벤처창업연구
• /
• 제11권5호
• /
• pp.105-115
• /
• 2016

본 연구의 목적은 잠재적 창업가의 노후준비도, 사회적 네트워크, 그리고 창업의도 간의 영향관계를 분석하고자 하였다. 이를 위해 305명의 서울과 수도권에 거주하는 잠재적 창업가들을 대상으로 구조화된 설문지를 설문 조사하였다. 수집된 자료는 SPSS WIN 21.0 프로그램을 사용하여 빈도분석, 타당성분석, t-test, ANOVA, 회귀분석 등을 실시하였다. 연구결과는 다음과 같다. 첫째, 노후준비도가 창업의도에 미치는 영향을 분석한 결과, 창업의지에 대하여 경제적 준비와 정서적 준비가 부(-)의 영향을 미쳤다. 둘째, 사회적 네트워크가 창업의도에 미치는 영향을 분석한 결과, 창업의도에 대하여 부(-)의 영향을 미치는 것으로 나타났다.

• 복식문화연구
• /
• 제18권6호
• /
• pp.1138-1152
• /
• 2010

The purposes of this study are to segment women consumers on the basis of clothing shopping orientation and to investigate clothing purchasing behaviors of each segmented group by age variable for development of effective fashion marketing strategies to meet very changeable modern consumers' needs. The research methodology is survey and subjects were 650 women aged from 20s to 60s. The questionnaire consist of measurement items for clothing shopping orientation, clothing purchasing behaviors and subjects' demographic attributions. The data were analyzed by Cronbach's ${\alpha}$, factor analysis, cluster analysis, $x^2$ test, ANOVA and Duncan's multiple range test, using SPSS program. The results are as follows. First, 5 factors were emerged on clothing shopping orientation. Second, women consumers are segmented into 4 types(conspicuous, convenient, pleasurable, and unconcerned type) by clothing shopping orientation. Third, each consumer type divided by age variable showed some important differences on demographic characteristics and various clothing purchasing behaviors. Therefore, the results of this study support that clothing shopping orientation can be useful as one of the effective differentiated variables to segment women consumer market and age variable has important mediate effects on the differences of clothing purchasing behaviors by clothing shopping orientation type.

• 성인간호학회지
• /
• 제23권5호
• /
• pp.482-493
• /
• 2011

Purpose: This study was conducted to compare and identify the mediating effect of family communication in the impact of death anxiety and personal meanings of death on the attitude of dignified death near the end-of-life among Korean mid-life and old people. Methods: A cross-sectional study was conducted with 287 mid-life and old people in Seoul, Busan, and Daegu City. Data were collected through self-report questionnaires which were standardized instruments from November 2010 to March 2011. Data were analyzed by using SPSS/WIN 14. Results: The results of the study indicated that there were statistically significant differences in level of death anxiety, personal meaning of death, and the dignified death between mid-age and old-age people. In addition, family communication had full mediating effects among the mid-age, while it had partial mediating effects among the old-age in the relationships between death anxiety, personal meaning of death, and the attitude of dignified death. Conclusion: Based on the findings of the study, implications for the intervention of the dignified death and preferences for care near the end-of-life among mid-life and old people and recommendations of further study were provided.