• 제목/요약/키워드: effects analysis

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부가통신서비스산업의 경제적 파급효과 분석: 산업연관분석을 이용하여 (The Role of the Value Added Network Service Industry in the Korean Economy: Using An Input-Output Analysis)

  • 신용재;최성욱
    • 디지털융복합연구
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    • 제11권12호
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    • pp.1-10
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    • 2013
  • 부가통신서비스산업은 통신서비스 산업과 국가 경제 발전에 중요성이 증대되고 있다. 따라서 본 연구는 산업연관분석을 이용하여 2000년, 2005년 2009년 세 개년도 동안 부가통신서비스 산업의 역할에 대해 조사하였다. 분석을 위해 수요유도모형에 따른 생산유발효과, 부가가치유발효과 그리고 취업유발효과, 공급유도모형과 레온티에프 가격 모형에 따른 공급지장효과, 물가파급효과 그리고 전후방연쇄효과에 대해 알아보았다. 분석 결과 생산유발효과는 2000년 0.5253원, 2009년 1.31314원, 부가가치유발효과는 0.25112원에서 0.5337원으로 취업유발효과는 0.09749명에서 0.21025명으로 성장하였고, 공급지장효과는 1.29003원에서 2.12048원, 레온티에프 가격모형에 의한 물가파급효과는 0.0022%에서 0.00258%로 상승하였다. 마지막으로 산업연쇄효과에 따르면 최종 수요적 원시산업형의 특징을 가지는 것으로 나타났다.

학교폭력이 청소년 우울 및 자살에 미치는 영향에서 탄력성의 매개효과 : 성별차이를 중심으로 (The mediational effects of resiliency on school violence causing adolescent depression and suicide : Focusing on gender differences)

  • 박재연
    • 사회복지연구
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    • 제41권1호
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    • pp.345-375
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    • 2010
  • 이 연구에서는 학교폭력이 청소년의 우울 및 자살에 미치는 영향과 탄력성이 매개요인으로서의 역할을 하는지 전체 모형 내에서 구조적 관계를 규명한 후, 모형의 전체 경로에서 성별에 따른 차이를 검증해보았다. 이를 위해 서울과 경기소재의 중학교와 고등학교에 재학중인 664명의 청소년들에게 인구사회학적 변인과 학교폭력 척도, 청소년 우울 및 자살척도, 자아·가족·학업탄력성 척도로 구성된 설문조사를 실시한 후, AMOS 17.0과 SPSS 17.0을 사용하여 자료를 분석하였다. 그 결과, 학교폭력은 청소년 우울과 자살에 정적영향이, 가족·학업탄력성에 미치는 부적 영향이 유의미한 것으로 나타났으며, 매개요인인 자아·가족탄력성은 청소년 우울에 미치는 부적 영향이, 가족탄력성은 청소년 자살에 미치는 부적 영향이 유의미한 것으로 나타났다. 성별차이에 관한 다중집단분석을 실시한 결과, 학교폭력이 청소년 자살과 가족탄력성에 미치는 영향에서 여학생이 남학생보다 큰 것으로 나타났다. 향후 학교폭력으로 인한 청소년 우울 및 자살에 대한 개입 시 본 연구 결과에서 밝혀진 구조적 모형과 성별차이를 고려한 차별화된 개입을 하는 것이 도움이 될 것이며, 후속연구와 반복검증을 통해 이를 보다 확고히 할 필요가 있다.

크리프-피로 영향을 고려한 터보펌프 터빈의 손상해석 (Damage Analysis of Turbopump Turbine considering Creep-Fatigue effects)

  • 이무형;장병욱;김진한;정은환;전성민;이수용;박정선
    • 한국항공운항학회지
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    • 제18권1호
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    • pp.1-10
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    • 2010
  • Structures under high temperature may have creep behavior and fatigue behavior. Durability study of the structures need the damage analysis with the creep-fatigue effects. In this paper, the damage analysis is studied for a turbine blade in the turbopump for a liquid rocket engine which is operated under high temperature condition. First of all, the load cycle is required for defining the operational characteristics of turbopump. The thermal stress analysis is done for a turbine blade of the turbopump. The stress analysis results are used to judge damage due to the creep and the fatigue. The strain-life method with miner rule is used for fatigue damage analysis. The Larson-Miller parameter master curve and robinson rule are used for the creep damage analysis. The linear damage summation method is used to consider creep-fatigue effects of turbopump turbine. Finally, the analysis results for fatigue and the influence are compared to figure out the damage phenomenon of the turbopump turbine.

Study on the Nonlinear Characteristic Effects of Dielectric on Warpage of Flip Chip BGA Substrate

  • Cho, Seunghyun
    • 마이크로전자및패키징학회지
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    • 제20권2호
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    • pp.33-38
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    • 2013
  • In this study, both a finite element analysis and an experimental analysis are executed to investigate the mechanical characteristics of dielectric material effects on warpage. Also, viscoelastic material properties are measured by DMA and are considered in warpage simulation. A finite element analysis is done by using both thermal elastic analysis and a thermo-viscoelastic analysis to predict the nonlinear effects. For experimental study, specimens warpage of non-symmetric structure with body size of $22.5{\times}22.5$ mm, $37.5{\times}37.5$ mm and $42.5{\times}42.5$ mm are measured under the reflow temperature condition. From the analysis results, experimental warpage is not similar to FEA results using thermal elastic analysis but similar to FEA results using thermo-viscoelastic analysis. Also, its effect on substrate warpage is increased as core thickness is decreased and body size is getting larger. These FEA and the experimental results show that the nonlinear characteristics of dielectric material play an important role on substrate warpage. Therefore, it is strongly recommended that non-linear behavior characteristics of a dielectric material should be considered to control warpage of FCBGA substrate under conditions of geometry, structure and manufacturing process and so on.

가족 가치관이 암환아 가족의 적응에 미치는 영향 (Effects of Family Value on Family Adaptation in Family Who has a Child with Cancer)

  • 박인숙;탁영란;이정애
    • Child Health Nursing Research
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    • 제7권4호
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    • pp.494-510
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    • 2001
  • As a family respond to any stressful situation as a whole system, cancer diagnosis of a child, as a serious life event, could be emotional shock to destroy homeostasis of the family system. A family has a resilient capacity to adjust and adapt to stressful events. Previous studies have been focused on family stress and adaptation, but little attention has been given to family value as one of resilient factors. The data for model testing were collected from July 18, 2000 to August 30, 2000 and the analysis included 309 parents of children who are diagnosed as cancer, 18 or less years of age, and treated either hospitalized or at the outpatient clinics. The data analysis utilized SAS 6.12 and LISREL 8 for descriptive statistics, correlation, cluster analysis, factor analysis, and LISREL. The study findings are as follows. 1) Monthly income (γ=-0.28, t=-5.81) was the most important factor to explain family strain along with family support (γ=-0.11, t=-2.43), severity of children's illness (γ=0.26, t=5.22), and family stressor (γ=0.22, t=4.62). All of these factors together explained 40% of variance in family strain. 2) Among general family value, the relationship with the parents (γ=0.28, t=4.89) and relationship with the children (γ=0.20, t=3.60) showed positive effects to family value for cancer children, while relationship with the spouse (γ=-0.19, t=-3.22) and the age of the cancer children (γ=-0.11, t=-2.21) showed negative effects. These predictors together explained 22% of variance in family value for cancer children. 3) Family hardiness was explained mostly by family strain (γ=-0.53, t=-8.65) along with direct negative effects of family persistency and indirect negative effects of severity of children's illness, family stressor, relationship with the spouse, and the children's age. Family value for cancer children was the most important predictor with positive effect (γ=0.44, t=6.76) along with indirect effects of monthly income, relationship with the parents, relationship with the children, support from family and significant others, and confidence with the health professionals. 51% of variance in family hardiness was explained by all of these predictors. 4) The most important predictor for family adaptation was family stressor (γ=-0.50, t=-6.85) with direct and indirect negative effects along with the severity of children's illness (γ=-0.27, t=-5.21). However, family value for cancer children showed compromised total effect (γ=-0.13, t=-1.99) with negative direct effects (γ=-0.28, t=-3.43) and positive indirect effects (γ=0.14, t=3.01). Similarly, confidence with the health professionals also showed compromised total effect (γ=0.09, t=1.99) with positive direct effects and negative indirect effects. Family hardiness showed the biggest positive direct effects while other factors such as monthly income, family stressor, family persistence, support of family and significant others, relationship with the parents, relationship with the children, and relationship with the spouse, and children's age showed indirect effects only. 39% of variance in family adaptation was explained by all of these predictors.

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L18(2 X 37) 직교배열표 실험자료에 대한 파레토 그림 분석 (Pareto Analysis of Experimental Data by L18(2 X 37) Orthogonal Array)

  • 임용빈
    • 응용통계연구
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    • 제17권3호
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    • pp.499-505
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    • 2004
  • 2수준 직교배열표를 이용한 실험자료에 대한 파레토 그림에 의한 분석 방법은 실무에서 많이 활용되고 있는데, 그 이유는 유의한 요인을 선별하기 위해서 분산분석법을 사용하지 않고 시각적이고 간결한 방법에 의하여 실험자료를 분석하기 때문이다. $L_{18}(2 \times 3^7)$ 직교배열표를 이용한 실험자료에 대한 분석방법으로 Park(1996)은 효과의 크기를 각 효과의 평균제곱으로 정의하고 파레토 원칙을 사용한 Pareto ANOVA를 제안하였다. 이 논문에서는 $L_{18}(2 \times 3^7)$ 실험자료에 대한 새로운 파레토 그림에 의한 분석 방법이 제시된다. 주요 요점은 3수준 효과의 크기를 일차와 이차 직교대비의 크기에 의해 분할하는 것이다.

제18대 대통령 선거에서 이념의 영향: 패널 데이터 분석 결과 (The Role of Political Ideology in the 2012 Korean Presidential Election: Evidence from Panel Data Analysis)

  • 김성연
    • 의정연구
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    • 제23권2호
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    • pp.147-177
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    • 2017
  • 한국 선거에서 정치 이념의 역할에 대해 그동안 수많은 연구가 이루어졌으나, 지금까지의 연구들은 예외 없이 횡단면 데이터(cross-sectional data) 분석에 전적으로 의존하였다. 기존의 연구들과 달리 이 연구는 지난 제18대 대통령 선거에서 나타난 이념 투표의 영향을 패널 데이터 분석(panel data analysis)을 통해 보다 엄밀하게 검증한다. 구체적으로, "EAI 총선대선패널조사, 2012"를 이용하여 지난 18대 대통령 선거 시기(2012년 4월 중순-12월 하순)에 정치적이념이 유권자들의 후보 호오도(candidate evaluation)와 후보 선택(vote choice)에 미친 영향을 고정 효과(fixed effects) 분석과 변동 효과(random effect) 분석 등 표준적인 패널 데이터 분석을 통해 살펴보았다. 또한 이념투표의 대표적 설명 모형인 근접성 모형(proximity model)과 방향성 모형(directional change model)을 적용한 결과를 비교 분석하였다. 분석 결과, 지난 18대 대통령 선거에서 진보와 보수의 정치적 이념은 박근혜와 문재인후보에 대한 호오도 및 이들에 대한 지지에 독립적이고 유의미한 영향을 미쳤다고 할 수 있다. 즉, 유권자들은 특정 후보와의 이념적 차이가 크다고 느낄수록 그후보에 대한 지지 확률 및 호오도가 상대적으로 낮아졌다. 그리고 이러한 이념투표의 영향은 근접성 모형보다 방향성 모형에서 상대적으로 뚜렷하게 나타났다.

기업의 제품화 역량, 조직역량, 해외시장 적응역량이 수출성과에 미치는 영향: 전자파 차폐 기업을 중심으로 (The Effects of Productization, Organizational, Overseas Market Adaptation Competences on Export Performance: Focus on Korean Electromagnetic Wave Shielding Firms)

  • 박원철;오가영
    • 아태비즈니스연구
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    • 제11권3호
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    • pp.307-344
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    • 2020
  • Purpose - The purpose of this study is to examine effects of productization and organizational competences on export performance of electromagnetic shielding companies and to analyze moderating effects of overseas market adaptation competences. For this, hypotheses were established by reviewing previous studies and an empirical analysis was conducted for testing. Design/methodology/approach - For this study, a survey was conducted for workers at electromagnetic shielding companies and 250 valid responses out of 300 questionnaires were aquired. A frequency analysis of related variables was conducted. Through an exploratory factor analysis, validity and reliability tests of measuring tools were conducted and a descriptive statistics was analyzed for collected data result and hypotheses testing. Findings - A correlation analysis was conducted to examine relationships among variables. Construct, convergent and discriminant validities were analyzed after a confirmatory factor analysis and a multi-group confirmatory factor analysis. Finally, with a verified model, the hypotheses and the moderating effects were tested. The results are as follows: First, the productization competence has a positive effect on export performance; Second, the organizational competence has a positive effect on export performance. Especially, the organizational competence has more effect on export performance than the productization competence. Although a development of new technology and product is important in terms of performance, along with these competences, a way of acquiring new skills and knowledge, and internalization and adaptation in organizations have more effect on export performance. Third, overseas market adaptation competence moderates effects of organizational and productization competences. Research implications or Originality - It is necessary to seek out opportunities for workers to participate in actively, such as conferences and seminars, to strengthen organizational competence. It is strongly believed that a constant development of high quality product will contribute to export performance. Lastly, in a policy level, supports on SMEs by governments are to be strengthened by providing with finance and human resource.

The Effects of Logistics Technology Acceptance in the Fourth Industrial Revolution on Logistics Safety Performance: The Moderated Mediating Effect of Logistics Safety Behavior through Safety Culture

  • Kim, Young-Min
    • Journal of Korea Trade
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    • 제26권1호
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    • pp.57-80
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    • 2022
  • Purpose - This study aims to examine the relationships between the acceptance of the 4th industrial revolution logistics technology, logistics safety behavior, and logistics safety performance, as well as the moderated mediating effects of logistics safety behavior through safety culture in Korea. Design/methodology - Research models and hypotheses were established based on prior research related to the 4th industrial revolution logistics technology, logistics safety, and logistics performance. The survey was conducted on the employees of logistics companies, and reliability analysis, confirmatory factor analysis, discriminant validity analysis, structural equation model analysis, and mediating effect analysis were performed. In addition, the moderated mediating effect analysis applying SPSS Process Model No. 7 was conducted. Findings - Usefulness and sociality of the acceptance of the 4th industrial revolution logistics technology had a significant effect on logistics safety behavior. Ease of use, sociality, and efficiency had meaningful effect on logistics safety performance. And in the relationships between the acceptance of logistics technology and logistics safety performance, logistics safety behavior had a significant mediating effect. But the moderated mediating effect of safety behavior through safety culture was not significant. Logistics companies can improve logistics safety performance through the utilization of new logistics technologies such as intelligent logistics robots, autonomous driving technology, and artificial intelligence, etc. Originality/value - This is the first study to analyze the relationships between the acceptance of logistics technology in the 4th industrial revolution and logistics safety. In addition, previous studies analyzed mediating effects or moderating effects, but this is the first study to identify the moderated mediating effects of safety behavior through safety culture. In other words, it has originality in terms of research methodology.

Analysis of cross-talk effects in volume holographic interconnections using perturbative integral expansion method

  • Jin, Sang-Kyu
    • Journal of the Optical Society of Korea
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    • 제2권2호
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    • pp.58-63
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    • 1998
  • Cross-talk effects in high-density volume holographic interconnections are investigated using perturbative iteration method of the integral form of Maxwell's wave equation. In this method, the paraxial approximation and negligence of backward scattering introduced in conventional coupled mode theory is not assumed. Interaction geometries consisting of non-coplanar light waves and multiple index gratings are studied. Arbitrary light polarization is considered. Systematic analysis of cross-talk effects due to multiple index gratings is performed in increasing level of diffraction orders corresponding to successive iterations. Some numerical examples are given for first and third order diffraction.