• 디지털융복합연구
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• 제17권6호
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• pp.133-144
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• 2019

본 연구의 목적은 신기술 투자가 ICT 법 제도와 정부조직 조직성과에 어떠한 영향력을 보이는지 실증연구를 하는 것이다. 연구에서는 정부조직의 ICT 투자 관심, 역량, 융합, 프로세스 변화의 영향력을 살펴보고, 정책 방향성을 제시하고자 한다. 본 연구 방법은 구조방정식을 사용하였다. 분석결과, ICT 투자 관심과 운영 역량은 ICT 법 제도에 부정적 영향을 보였고, ICT 프로세스 역할 변경과 신기술 융합은 ICT 법 제도에 긍정적 영향을 보였다. 그리고 국가정보화 기본법은 조직성과에 긍정적 영향을 보였지만, 전자정부법은 부정적 영향을 보였다. 본 연구의 시사점은 조직 연구를 경영정보 관점으로 넓혔으며, 정책적 관점에서 정부조직별로 ICT 공동 추진과 법 제도의 중첩에 따른 상호 갈등 부분의 해소가 요구된다. 향후 연구는 이전부터 현재 정권까지의 ICT 역량에 대한 종단 연구가 필요하겠다.

• 한국콘텐츠학회논문지
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• 제19권3호
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• pp.457-465
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• 2019

본 연구는 영아의 언어발달에 영향을 주는 요인을 확인하기 위하여 한국아동패널 1차년도(2008년)부터 3차년도(2010년)까지 3개년도의 패널 데이터를 구성하여 패널분석을 실시하였다. 설문 참여 영아 2,150명을 분석 대상으로 하였고, 한국아동패널에서 제공하는 K-ASQ 검사의 의사소통 점수를 활용하여 영아의 언어발달 정도를 측정하였다. 또한 선행연구를 통해 도출한 영아의 언어발달 영향요인들을 모형에 투입하였으며, 가구 및 부모 특성에 주목하여 영아의 언어발달 영향 요인을 확인하였다. 분석 결과, 하우스만 검정을 통해 패널의 개체 특성 오차항을 고정한 고정효과모형이 적합한 것으로 나타났고, 영아의 인지발달 수준이 높아질수록, 부모의 긍정적인 양육행동이 많아질수록 영아의 언어발달 수준이 높아지는 것으로 확인되었다. 이를 통해 언어발달에 영향을 미치는 가구 및 부모 특성에 대한 결론 및 제언을 첨언하였다.

• 대한치매학회지
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• 제17권4호
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• pp.137-147
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• 2018

Background and Purpose: Previous studies have suggested a decreased cancer risk among patients with Alzheimer's disease (AD). There remains a lack of data on the specific types of cancer and risk factors for developing cancer in AD. We evaluated the association between AD and cancer risk, and we examined specific types of cancer. Methods: A population-based longitudinal study was conducted using the National Health Insurance Service-Senior cohort for 2002-2013. A total of 4,408 AD patients were included in the study, as were 19,150 matched controls. Potential associations between the risk of cancer and AD were analyzed using Cox proportional hazard regressions. Results: Cancer developed in 12.3% of the AD group patients and in 18.5% of control group subjects. AD was associated with a reduced risk of cancer (hazard ratio [HR], 0.70; 95% confidence intervals, 0.64-0.78). The risk of head and neck cancers was significantly reduced (HR, 0.49), as were risks for cancers of the digestive tract, including stomach cancer (HR, 0.42), colorectal cancer (HR, 0.61), liver and biliary tract cancers (HR, 0.68), and pancreatic cancer (HR, 0.55). Lung and prostate cancer risks were also significantly lower for the AD group (HR, 0.52 and HR, 0.72, respectively). Conclusions: Our results showed an inverse association between AD and cancer. Further research involving a large number of patients in a hospital based-study is needed to address the biological associations between cancer development and dementia, including AD.

• 한국해양공학회지
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• 제33권1호
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• pp.33-41
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• 2019

Estimating fatigue damage is a very important issue in the design of ships. The springing and whipping response, which is the hydro-elastic response of the ship, can increase the fatigue damage of the ship. So, these phenomena should be considered in the design stage. However, the current studies on the the application of springing and whipping responses at the design stage are not sufficient. So, in this study, a prediction method was developed using fluid-structural interaction analysis to assess of the fatigue damage induced by springing and whipping. The stress transfer function (Stress RAO) was obtained by using the 3D FE model in the frequency domain, and the fatigue damage, including linear springing, was estimated by using the wide band damage model. We also used the 1D beam model to develop a method to estimate the fatigue damage, including nonlinear springing and whipping by the vertical bending moment in the short-term sea state. This method can be applied to structural members where fatigue strength is weak to vertical bending moments, such as longitudinal stiffeners. The methodology we developed was applied to 325K VLOC, and we analyzed the effect of the springing and whipping phenomena on the existing design.

• 한국콘텐츠학회논문지
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• 제19권6호
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• pp.148-159
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• 2019

우리나라 기혼 여성의 부모 거주형태와 부부활동, 가족 부양인식 및 결혼행복감의 관련성을 파악하기 위한 목적으로 연구를 실시하였다. 여성가족패널(KLoWF)조사 6차년도(2015-2016) 자료를 활용하여 최종 2,120명의 기혼 여성을 선정하였으며, 부모 거주형태와 부부활동, 가족 부양인식 및 결혼행복감을 측정하였다. 단변량 결과, 인구사회학적 특성별 부모 거주형태와 부부활동, 가족 부양인식 및 결혼행복감은 유의한 차이가 있었다. 게다가 부모 거주형태가 근거리에 거주하거나 친정 부모나 시댁 부모 중 한쪽이라도 근거리에 거주하는 경우 부부활동을 자주하고 결혼행복감이 높은 경향이었으며 부모 세대와 동거하거나 근거리에 거주하는 경우 가족 부양인식이 호의적인 경향이었다. Sobel Test를 통해 유의성을 검정한 결과, 부모 거주형태에 따라 결혼행복감에 직접적인 영향을 미치지 않았으나, 부부활동 및 가족 부양인식에 간접적인 영향을 미쳤다. 이상의 연구 결과는 보편화된 핵가족 사회에서 배우자 및 가족 구성원간의 유대관계를 향상시키는 정책적 계획 설계에 도움이 될 것이다.

• Journal of Periodontal and Implant Science
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• 제49권4호
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• pp.206-214
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• 2019

Purpose: The purpose of this study was to examine the association between the intake of semi-solid yogurt and periodontitis in Korean adults using a national database. Methods: The data analyzed in this study are a subset of the sixth Korean National Health and Nutrition Examination Survey conducted in 2015 by the Korea Centers for Disease Control and Prevention. The sample size for this study was 4,727. We collected data on sociodemographic characteristics, oral health-related variables, oral and general health status, and intake of semi-solid yogurt. Semi-solid yogurt intake (YI) was calculated by multiplying the frequency of YI over the previous week by the average intake per serving. We assessed periodontal conditions using the Community Periodontal Index (CPI) and defined periodontitis as a CPI score ${\geq}3$. Multivariate logistic regression analyses were performed after adjusting for sociodemographic variables, and oral and general health behaviors and status. Results: The mean weekly YI among those without periodontitis ($1.03{\pm}0.06cups$) was significantly higher than among those with periodontitis ($0.77{\pm}0.08cups$) (P<0.001). Individuals who consumed more than 2 cups of yogurt per day were 76% less likely to have periodontitis than those who consumed less than 1 cup of yogurt per week after adjusting for all covariates (odds ratio, 0.24; 95% confidence interval, 0.10-0.60). Conclusions: We found a significant association between increased intake of semi-solid yogurt and periodontal health. We therefore recommend daily consumption of semi-solid yogurt as a probiotic to improve periodontal health. Further longitudinal studies are required to elucidate plausible mechanisms through which probiotics impact periodontal disease, considering both periodontal pathogens and clinical periodontal parameters.

• 디지털융복합연구
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• 제17권4호
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• pp.365-379
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• 2019

본 연구는 사이버 비행에 영향을 미치는 요인은 무엇인지를 살펴보기 위해 기존의 여러 연구에서 검토된 일반긴장 이론, 비행기회 이론을 중심으로 선행연구를 고찰한 이후 한국 아동 청소년 패널 초등학교 4학년을 대상으로 한 패널 4차 자료와 7차 자료를 이용하여 청소년이 중학교에서 고등학교로 이행하는 과정에서 사이버 비행에 영향을 주는 요인을 종단적 측면에서 분석하고자 하였다. 연구방법은 STATA 프로그램을 이용하여 사이버 비행을 저지르는 결정요인을 패널 로짓분석을 통해 살펴본 다음 이후 패널 토빗확률효과 모형을 통하여 청소년의 사이버 비행횟수에 영향을 주는 요인들에 대해 분석하였다. 분석결과, 사이버 비행횟수와 관련해서는 성인매체몰입, 컴퓨터 사용시간, 휴대폰 의존 정도는 사이버 비행횟수를 증가시켰으며, 연령증가, 부모의 양육태도 중 관심적 감독은 청소년의 사이버 비행횟수를 감소시키는 것으로 나타났다.

• 한국군사과학기술학회지
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• 제24권4호
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• pp.357-367
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• 2021

This paper studies the simulations of active airframe vibration controls for the Sikorsky X2 helicopter with a lift-offset coaxial rotor. The 4P hub vibratory loads of the X2TD rotor are obtained from the previous work using a rotorcraft comprehensive analysis code, CAMRAD II. The finite element analysis software, MSC.NASTRAN, is used to model the structural dynamics of the X2TD airframe and to analyze the 4P vibration responses of the airframe. A simulation study using Active Vibration Control System(AVCS) with Fx-LMS algorithm to reduce the airframe vibrations is conducted. The present AVCS is modeled using MATLAB Simulink. When AVCS is applied to the X2TD airframe at 250 knots, the 4P longitudinal and vertical vibration responses at the specified airframe positions, such as the pilot seat, co-pilot seat, engine deck, and prop gearbox, are reduced by 30.65 ~ 94.12 %.

• 한국가족관계학회지
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• 제21권4호
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• pp.51-74
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• 2017

Objectives: This study observes how providing family support - financial, emotional, and instrumental - is related to depression in babyboom women. Method: I analysed data from the Korean Longitudinal Survey of Women and Families 5th wave, collected by the Korean Women's Development Institute. The analysis was conducted using regression, t-test, Chi-square test, frequency analysis, and Pearson's correlation analysis. Results: Financial support for grown-up children, either married or unmarried, increases depression in babyboom women. In the dimension of instrumental support, caring for grandchildren reduces babyboom women's depression. It implies that contact with grandchildren is perceived as an emotional support rather than a physical burden. The results of this study also show that babyboom women are comforted by living with their own parents, but not by living with parents-in-law. The most impressive observation, however, is in the dimension of emotional support, which showed that the conversation with elderly parents reduces baby-boom women's depression, but that the conversation with married children increases it. The opposite directions in the effects seem to be related to the subjects of the conversations. The subjects of the conversation with children are mostly about problems and agenda of the children, while those with elderly parents are mainly about parents' health and care for each other. Conclusions: The results of the analyses suggest that babyboom women should become less involved with their grown-up children's lives. It also calls for the societal efforts to be put into building up the support system, especially for eco-boom generation, to reduce babyboomer's burden of supporting the children.

• 한국가족관계학회지
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• 제21권1호
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• pp.123-141
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• 2016

Objective: This study examined correlates of residential proximity between parents and non-coresident married children. A majority of existing studies on intergenerational living arrangement has focused on exploring factors that are associated with intergenerational coresidence only, despite an increasing number of parents and children who do not live together but close by. Because residential proximity facilitates frequent contacts and support exchanges between the two generations, it is important to understand its correlates. Method: The data were drawn from first wave of the Korean Longitudinal Study of Ageing (KLoSA, 2006), a nationally representative sample of adults 45 years or older and their spouses. The analytic sample consisted of 3,950 parents with 10,946 non-coresident married children. Both regression with robust standard errors and sibling fixed effects regression models were estimated using the reg and xtreg procedures in STATA. Results: Younger, less depressed, and more physically impaired parents lived closer to at least one of their married children (within a 30-minute distance by public transportation). Fathers (compared to mothers), parents living in cities (compared to those living in rural areas), parents with at least one co-resident child or fewer numbers of married children tended to have at least one married child living nearby. With regard to child characteristics, married children who were less educated, homeowners, and had more children lived closer to their parents. Also, sons (compared to daughters) lived in closer distance to their parents. Conclusion: Overall, findings suggest that intergenerational residential proximity may primarily be motivated by the childcare needs of married children or parents' needs for assistance with functional impairment. Also, the traditional patrilineal norms of intergenerational support may still be a critical factor in residential decisions as observed in the difference between married sons and daughters in proximity to their parents.