• Journal of applied mathematics & informatics
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• 제24권1_2호
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• pp.427-435
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• 2007

The existence theorem and continuous dependence property in $"L^2"$ sense for solutions of backward stochastic differential equation (shortly BSDE) with Lipschitz coefficients were respectively established by Pardoux-Peng and Peng in [1,2], Mao and Cao generalized the Pardoux-Peng's existence and uniqueness theorem to BSDE with non-Lipschitz coefficients in [3,4]. The present paper generalizes the Peng's continuous dependence property in $"L^2"$ sense to BSDE with Mao and Cao's conditions. Furthermore, this paper investigates the continuous dependence property in "almost surely" sense for BSDE with Mao and Cao's conditions, based on the comparison with the classical mathematical expectation.

• 디지털융복합연구
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• 제18권4호
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• pp.273-279
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• 2020

본 연구의 목적은 청소년의 휴대전화 의존과 공동체 의식 간의 관계에서 사회적 위축의 매개효과를 검증함으로써, 청소년의 휴대전화 의존 개입에 대한 근거자료를 확보하는 것이다. 자료수집은 한국 아동·청소년 패널조사 초등 4학년 패널 자료 중 2016년 7차 연도 자료 1,979명을 대상으로 하였다. 연구결과, 휴대전화 의존은 공동체 의식의 감소에 유의한 영향을 주었으며, 사회적 위축을 경유하여 공동체 의식에 영향을 미쳤다. 따라서 청소년들의 휴대전화 의존 관련 감소된 공동체 의식을 향상하기 위해, 사회적 위축을 감소하는 적극적 개입이 필요함을 시사한다. 또한, 휴대전화 의존 관련 공동체 의식 약화를 다룰 때, 의존과 사회적 위축, 공동체 의식 변인을 함께 고려하는 심리적 사회적 측면의 융복합적 개입이 필요함을 의미한다.

• 근관절건강학회지
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• 제24권1호
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• pp.37-46
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• 2017

Purpose: The purpose of this study was to examine the effects of the program to improve on smoking patients' after acute coronary syndrome (ACS) smoking cessation rate, smoking cessation related self-efficacy, carbone monoxide (CO), nicotine dependence, and pain sense. Methods: This study used a non-equivalent control group pretest-posttest design. The participants of this study were 60 ACS patients: experimental group (30), control group (30), who received percutaneous coronary intervention. The study lasted from Aug 16, 2016 to Jan 13, 2017. Smoking cessation rate, smoking cessation related self-efficacy, CO, nicotine dependence, and pain sense were measured using the structured questionnaires and CO monitor Results: An examination of the effects of this program revealed the experimental group to have a significant increase in smoking cessation rate, smoking cessation related self-efficacy than the control group, and a significant decrease in CO, nicotine dependence and pain sense than in the control group. Conclusion: The findings indicate that this smoking cessation self-efficacy improvement program is effective for hospitalized patients after ACS.

• 디지털융복합연구
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• 제10권9호
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• pp.175-184
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• 2012

본 연구의 목적은 스마트폰의 지각된 특성이 심리적 태도에 미치는 영향 관계를 규명하는데 있다. 연구목적을 달성하기 위해 스마트폰의 지각된 특성의 변수로서 지각된 유용성과 지각된 사용용이성을 설정하였다. 그리고 심리적 태도 변수로는 안도감과 의존감을 결과 변수로는 사용자 만족을 설정하여 연구모델을 제시하였다. 연구모델을 실증 분석하기 위하여 국내 대학생을 대상으로 설문조사를 실시하였다. 본 연구의 이론적 시사점은 스마트폰의 지각된 특성과 심리적 태도를 연구하는데 이론적 토대를 마련하였다. 실무적 시사점은 첫째, 스마트폰의 지각된 특성인 유용성과 사용용이성은 심리적 태도인 안도감과 의존감에 긍정적인 영향을 미친다. 둘째, 스마트폰에 대한 의존감은 사용자 만족에 영향을 미치지만 안도감은 사용자 만족에 영향을 미치지 않는 것으로 나타났다.

• Journal of the Korean Statistical Society
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• 제30권3호
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• pp.407-418
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• 2001

Buhlmann(1944) established the validity of the block bootstrap proposed by Kunsch when it is applied to p-dimensional $\alpha$-mixing dependent sequence. But his result requires a rather restrictive condition on p in the sense that p is entangled with dependence structure. We address that such restriction on p(or complication of dependence structure with p) could be removed completely when the underlying dependence structure is replace by more weakly dependent structure such as ø-mixing.

• 한국지구과학회지
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• 제38권5호
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• pp.333-344
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• 2017

We present the environmental dependence of the luminosity-size relation of galaxies in the local universe (z < 0.01) along with their dependence on galaxy morphology represented by five broad types (E, dEs, S0, Sp, and Irr). The environmental parameters we consider are the local background density and the group/cluster membership together with the clustercenteric distance for the Virgo cluster galaxies. We derive the regression coefficient (${\beta}$), i.e., the slope of the line representing the least-squares fitting to the data and the Pearson correlation coefficient (c.c.) representing the goodness of the least-squares fit along with the confidence interval from bootstrap resampling. We find no significant dependence of the luminosity-size relation on galaxy morphology. However, there is a weak dependence of the luminosity-size relations on the environment of galaxies, in the sense that galaxies in the low density environment have shallower slopes than galaxies in the high density regions except for elliptical galaxies that show an opposite trend.

• Human Ecology Research
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• 제52권5호
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• pp.519-528
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• 2014

This study explores how the main variables of youth going through a transition period (parents' nurturing behavior, the youth's self-esteem and ego resilience, the peer group relationships) affect the youth's school adjustment. It also analyzes the effects of theses variables on the youth's dependence on cell phones, which are considered a necessity in modern society. This research is verified by using a structure model verification method based on data from the Korean Children Youth Panel Study. According to the research, first, 1st-year students in middle school show better adjustment to their school life and less dependence on cell phones when they have a stronger sense of self-esteem and ego resilience; further, it is revealed that cell phone dependence has an indirect influence on the school life of these children. Second, they tend to show better adjustment to their school life and less dependence on cell phones when their parents' nurturing behaviors are more positive. Third, these children tend to depend more on cell phones when they have a positive peer group relationship, Moreover, cell phone dependence has an indirect influence on their school life. When considering the impact of cell phone to youth in modern society, need to prepare proper training program for correct uses and preventing from addiction.

• 대한수학회지
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• 제56권3호
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• pp.825-855
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• 2019

We establish the existence of $C^1$ stable invariant manifolds for differential equations $u^{\prime}=A(t)u+f(t,u,{\lambda})$ obtained from sufficiently small $C^1$ perturbations of a nonuniform exponential dichotomy. Since any linear equation with nonzero Lyapunov exponents has a nonuniform exponential dichotomy, this is a very general assumption. We also establish the $C^1$ dependence of the stable manifolds on the parameter ${\lambda}$. We emphasize that our results are optimal, in the sense that the invariant manifolds are as regular as the vector field. We use the fiber contraction principle to establish the smoothness of the invariant manifolds. In addition, we can also consider linear perturbations, and thus our results can be readily applied to the robustness problem of nonuniform exponential dichotomies.

• 한국산학기술학회논문지
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• 제11권2호
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• pp.485-490
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• 2010

본 논문에서는 버팅 콘택(butting contact) 구조를 갖는 DDI DRAM소자의 감지 증폭기의 입력 게이트 단의 모든 기생 성분을 포함한 등가 회로를 제안 하였다. 제안한 모델을 이용하여 기생 쇼트키 다이오드가 감지 증폭기 동작에 어떤 영향을 미치는지 분석하였다. 각각의 불량 가능성에 대해 감지 증폭기가 어떻게 동작하는지 분석하여 단측 불량 특성의 원인을 규명하였다. DDI DRAM에서 단측 불량 원인과 불량률의 온도 의존성은 감지 증폭기의 입력 게이트 단에 형성된 기생 쇼트키 다이오드 형성에 기인한 것으로 판단된다. 이러한 기생 쇼트키 다이오드는 게이트 입력에 기생 전압 강하를 야기하게 되고 결국 감지 증폭기의 노이즈 마진을 감소시켜 단측 불량률을 증가시킨다.

• Journal of information and communication convergence engineering
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• 제8권5호
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• pp.595-601
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• 2010

The strategy through visual sense is one of the ways that subject builds the outside world and communicates. The visual sense seems higher level of dependence than the other senses and contributes to intercommunication. For this reason, the desire of image dates back to primitive art and visual image(visual media and visual culture) has dialectically developed in the history of mankind. Visual subject, based on perspective of Renaissance, was moved from God to human beings. Andre Bazin's 'la genese automatique' through technical art has epochally changed the paradigm of visual art and visual culture. From primitive art to photo and film, the image, based on visual sense, has reflected human wish, appealed visual desire and led to evolution of image. In the late 20 century, without dialectical evolution of technology and culture, rapidly progressive digital image has changed social and cultural implication over rational strategy of production and distribution and it strengthened authority of image through visual approach of endless desire. The goal of this study is to analyze the value change of digital image developing a new Renaissance through production, reading, communication, and implication of evolution due to digitalized image, which has evolved as object and tool of desire.