• Human Ecology Research
• /
• 제57권1호
• /
• pp.15-26
• /
• 2019

This study showed that the association between solidarity and conflict is mediated by the communication of grandmothers and an adult child at the dyadic level. The common fate model (CFM) was designed to model mediation effects at the level of dyads. Participants consisted of 297 grandmother dyads and their adult child who were rearing preschool-aged grandchildren in Seoul and Gyeonggi-do. For analysis at the dyadic level, grandmothers and adults responded to the same questionnaire on the same variables. SPSS 23.0 performed descriptive statistical analysis and correlation analysis. The structural equation model (SEM) was estimated with AMOS 23.0. We tested the mediation model using the maximum likelihood method. Model fit index used the chi-square statistic, the incremental fit index (IFI), the comparative fit index (CFI), the root mean square error of approximation (RMSEA). The statistical significance of the indirect effect was examined using a bootstrapping procedure. The results are as follows. First, in the CFM, the direct effect between solidarity and conflict was significant. Therefore, the higher the solidarity, the lower conflict of grandmothers and an adult child. Second, the association between solidarity and conflict is mediated by communication at the dyadic level. Based on the results of this study, we discussed ways to strengthen the capacity of co-parenting between grandmothers and an adult child.

• 한국노년학
• /
• 제41권3호
• /
• pp.421-444
• /
• 2021

본 연구의 목적은 노년기 부부관계 내에서 우울과 부부관계만족도 간 종단적 상호관계가 어떠한지 탐색하는 데 있다. 부부의 상호의존성을 반영하고 부부자료를 하나의 모형에서 분석하기 위해 행위자-상대방 상호의존모형(Actor-Partner Interdependence Model)과 공통운명모형(Common Fate Model)을 기반으로 연구모형을 설정하였으며, 변인 간 종단적 상호관계를 검증하기 위해 자기회귀교차지연 모형을 활용하였다. 한국복지패널조사의 10차 년도(2015년)부터 13차 년도(2018년)까지의 4개년도 자료로 부부자료(dyadic data)를 구성하였으며, 최종적으로 2015년 기준 60세 이상인 부부 1,383쌍(2,766명)에 대하여 구조방정식모형을 이용하여 분석하였다. 주요 분석결과는 첫째, 노년기 부부의 부부관계만족도는 남편 우울, 아내 우울에 종단적으로 부적 영향을 미치는 것으로 나타났으며, 부부관계만족도가 남편 우울에 미치는 영향보다 아내의 우울 수준에 미치는 영향이 유의하게 더 큰 것으로 나타났다. 둘째, 남편 우울 수준과 아내 우울 수준은 부부 공통의 관계만족도에 종단적으로 부적 영향을 미쳤으나 영향력의 크기 차이는 유의하지 않았다. 본 연구의 결과는 우울과 부부관계만족도가 상호순환관계에 있음을 보여주며, 부부관계만족도의 저하와 우울의 증가라는 악순환 고리가 형성될 가능성을 제기한다. 이를 바탕으로 노년기 우울과 부부관계만족도의 개선을 위해서 부부 단위의 개입과 부부 각자에 대한 개별적 접근을 병행해야 함을 논의하였다.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2003년도 총회 및 춘계학술발표회
• /
• pp.430-433
• /
• 2003

Nitrogen pollution in urban and rural groundwater is a common problem and poses a major threat to drinking water supplies based on groundwater. In this work, the kinetics of nitrification-denitrification coupled reactions are modeled and new reaction modules for the RT3D code describing the fate and transport of nitrogen species, dissolved oxygen, dissolved organic carbon, and biomass are developed and tested. The proposed nitrogen transformations and transport model showed very good match with the results of other public codes.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
• /
• pp.195-198
• /
• 2002

Nitrogen pollution in urban and rural groundwater is a common problem and poses a major threat to drinking water supplies based on groundwater. In this work, the kinetics of nitrification-denitrification coupled reactions are modeled and new reaction modules for the RT3D code (Clement, 1997) describing the fate and transport nitrogen species, dissolved oxygen, dissolved organic carbon, and biomass are developed. The proposed nitrogen transformations and transport model showed very good match with results of a conceptual model. However, the model simulation results for the major reactive species should be tested for validation using experimental and field data.

• 디지털융복합연구
• /
• 제15권1호
• /
• pp.583-591
• /
• 2017

본 연구는 스키리조트 종사자가 지각하는 윤리경영과 조직동일시 및 고객지향성간의 구조적 인과관계를 실증적으로 검증하는데 목적이 있다. 이를 위해 국내 스키리조트에 근무하는 종사자 200명을 대상으로 설문조사를 실시하였다. 설문조사는 연구목적에 부합하는 윤리경영, 조직동일시, 고객지향성의 총 3개 변인으로 구성되었다. 또한 자료처리는 빈도분석, 확인적요인분석, 신뢰도분석, 상관관계분석, 구조방정식모형분석 등을 실시하여 다음과 같은 연구결론을 얻었다. 첫째, 스키리조트 종사자가 지각하는 윤리경영은 조직동일시에 정(+)적인 영향을 미친다. 둘째, 스키리조트 종사자가 지각하는 윤리경영은 고객지향성에 정(+)적인 영향을 미친다. 셋째, 스키리조트 종사자가 지각하는 조직동일시는 고객지향성에 정(+)적인 영향을 미친다. 이러한 연구내용을 통해 스키리조트의 윤리적 경영활동은 조직을 공동운명체로 여기고, 고객의 입장을 고려한 질 높은 서비스를 제공하려는 종사자의 태도나 행동에 긍정적인 영향을 미칠 수 있음을 확인할 수 있다.

• 대한자원환경지질학회:학술대회논문집
• /
• 대한자원환경지질학회 2002년도 제18차 공동학술강연회 자연저감고 지질학 (대한 자원 환경지질학회)
• /
• pp.81-100
• /
• 2002

While most of regulatory communities in abroad recognize ' 'natural attenuation " to include degradation, dispersion, dilution, sorption (including precipitation and transformation), and volatilization as governing Processes, regulators prefer "degradation" because this mechanism destroys the contaminant of concern. Unfortunately, true degradation only applies to organic contaminants and short- lived radionuclides, and leaves most metals and long-lived radionuclides. The natural attenuation Processes may reduce the potential risk Posed by site contaminants in three ways: (i)contaminants could be converted to a less toxic form througy destructive processes such as biodegradation or abiotic transformations; (ii) potential exposure levels may be reduced by lowering concentrations (dilution and dispersion); and (iii) contaminant mobility and bioavailability may be reduced by sorption to geomedia. In this review, authors will focus will focul on "sorption" among the natural attenuation processes of hazardous inorganic contaminants including radionuclides. Note though that sorption and transformation processes of inorganic contaminants in the natural setting could be influenced by biotic activities but our discussion would limit only to geochemical reactions involved in the natural attenuation. All of the geochemical reactions have been studied in-depth by numerous researchers for many years to understand "retardation" process of contaminants in the geomedia. The most common approach for estimating retardation is the determination of distrubution coefficiendts ($K_{d}$) of contaminants using parametric or mechanistic models. As typocally used in fate and contaminant transport calculations such as predictive models of the natural attenuation, the $K_{d}$ is defined as the ratio of the contaminant concentration in the surrounding aqueous solution when the system is at equilibrium. Unfortunately, generic or default $K_{d}$ values can result in significant error when used to predict contaminant migration rate and to select a site remediation alternative. Thus, to input the best $K_{d}$ value in the contaminant transport model, it is essential that important geochemical processes affecting the transport should be identified and understood. Precipitation/dissolution and adsorption/desorption are considered the most important geochemical processes affecting the interaction of inorganic and radionuclide contaminants with geomedia at the near and far field, respectively. Most of contaminants to be discussed in this presentation are relatively immobile, i.e., have very high $K_{d}$ values under natural geochemical environments. Unfortunately, the obvious containment in a source area may not be good enough to qualify as monitored natural attenuation site unless owner demonstrate the efficacy if institutional controls that were put in place to protect potential receptors. In this view, natural attenuation as a remedial alternative for some of sites contaminated by hazardous-inorganic components is regulatory and public acceptance issues rather than scientific issue.