• 한국융합학회논문지
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• 제10권7호
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• pp.213-224
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• 2019

본 연구는 청소년들이 지각한 부모애착이 학습몰입에 미치는 영향에서 부모의 지지적 학업기대와 청소년의 낙관성의 매개효과를 융합적으로 검증하고자 수행되었다. 연구 대상은 서울특별시에 소재한 중 고등학교 학생 184명이었다. 연구결과, 첫째, 학업기대와 낙관성은 부모애착과 학습몰입 간의 관계에서 완전 매개효과를 보였다. 간접효과의 유의성을 Bootstrapping 방법으로 분석한 결과, 부모의 학업기대와 청소년의 낙관성을 통한 간접효과는 모두 통계적으로 유의하였다. 둘째, 학업기대와 낙관성의 간접효과 간의 차이를 Bootstrapping 방법으로 분석한 결과 통계적으로 유의한 차이가 없었다. 이러한 연구 결과를 바탕으로 부모와의 건강한 애착 관계는 부모의 지지적 기대를 증가시키고, 청소년들에게는 낙관성을 증진시켜, 효율적인 학습을 위한 학습몰입을 향상시키는 것을 알 수 있었다. 그리고, 청소년의 학습몰입을 증진시키기 위한 부모와 자녀의 역할과 기대에 대해 논의하였다.

• 교육시설 논문지
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• 제26권3호
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• pp.15-23
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• 2019

This study aims to suggest a Biophilic classroom design of high school to obtain attention restoration for students. The learning space for youth in the modern society is composed of dry artificial structures. This space is considered to be a space that can not relieve stress caused by learning. "The Attention Restoration Theory" is divided into "Directed Attention" of humans, which is the cause of fatigue and stress, and "Involuntary Attention" as a solution to it. "Involuntary Attention" takes place in a rest state and helps the brain recover when exposed to nature. And the core of "Biophilic-Design Theory" is that humans can recover physical and mental conditions when exposed to nature. The purpose of this study is to apply "The Biophilic-Design Theory" that emphasizes the importance of exposure to nature to the educational space and plan the space where the 'Attention Restoration' can be achieved. The research method is as follows. First, we review previous studies related to "The Biophilic-Design Theory" and "The Attention Restoration Theory". Second, we analyze the application examples of "The Biophilic-Design Theory" and "The Attention Restoration Theory" in domestic and foreign educational spaces. Third, the concept of educational space is set up based on the elements derived from previous studies. Finally, we propose the planning direction of classroom design based on Biophilic-Design. The following conclusions were drawn. First, The creation of the education space to restore the learner's attention requires a visual space plan that utilizes natural elements such as natural light, artificial light, plants, and natural materials that can directly experience nature. Second, the direction in which students in the classroom can be "The Attention Restoration Theory" should consider the use of indirect natural elements that bring the surrounding natural landscape into the interior. This study will be used as the baseline data for the spatial design and planning of education facilities based on Biophilic-Design.

• Fisheries and Aquatic Sciences
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• 제21권11호
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• pp.32.1-32.7
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• 2018

Trout production is a growing activity in recent years but requires new alternative sources of feed to be sustainable over time. The objective of this research was to determine the apparent digestibility coefficient (ADC) of dry matter (DM), organic matter (OM), crude protein (CP) and digestible energy (DE) of $ka{\tilde{n}}iwa$ (Chenopodium pallidicaule Aellen), kiwicha (Amaranthus caudatus L), quinoa (Chenopodium quinoa Willd), beans (Phaseolus vulgaris L.), sacha inchi, (Plukenetia volubilis L) and jumbo squid (Dosidicus gigas) meal in juvenile rainbow trout. The experimental diets were composed of a 70% basal diet and 30% of any raw materials. The ADC was determined by the indirect method using insoluble ash as a non-digestible marker. Jumbo squid, sacha inchi and quinoa showed the highest values of ADC (%) of DM (84.5, 73.5 and 69.7), OM (89.1, 78.4 and 72.9), CP (93.2, 98.0 and 90.3), and DE (4.57, 4.15 and 2.95 Mcal/kg DM), respectively. The ADC values for $ka{\tilde{n}}iwa$, kiwicha and bean were significantly lower. In conclusion, quinoa meal and jumbo squid meal have an acceptable digestibility but sacha inchi meal is a potential alternative for rainbow trout feeding in the future.

• 한국산업보건학회지
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• 제31권1호
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• pp.38-49
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• 2021

Objectives: This study was conducted to analyze the impact of safety/health managers' experience of trauma case on their post traumatic stress disorder and the mediation effects of job stress and the moderated mediation effects of social support. Method: Using a structured questionnaire, data were collected from 241 workplace safety/health managers with experience in trauma case. The collected data were analyzed using SPSS(IBM. Ver.26.0) and verified through SPSS PROCESS Macro (Ver. 3.4). Results: The trauma case experience and the job stress, which is a mediation variable, had a statistically significant positive effect on post-traumatic stress disorder, and the job stress had a positive mediation effect in the relationship between the trauma case experience and post-traumatic stress disorder. Social support had a statistically significant negative moderation effect in the relationship between the trauma case experience and job stress; social support had a moderated mediation effect on the indirect effect of a job stress on the post-traumatic effect through a trauma case experience. Conclusion: The above findings suggest that work-related job stress management is important in order to reduce safety/health managers' post-traumatic stress disorder caused by the experience of trauma case, and that social support is essential to reduce the job stress, which can later be used as a basis for further studies.

• Human Ecology Research
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• 제59권1호
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• pp.1-11
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• 2021

This study investigated the impact of solution-focused thinking on marital satisfaction via mediating roles of father involvement in childcare and marital conflict. A questionnaire survey was conducted among mothers with infants, living in Busan, Daegu and Yangsan, South Korea. Data from 264 mothers were analyzed using several multiple regression analyses and bootstrapping method with SPSS 25.0 and PROCESS macro (model 6) to test the serial double mediation model. The results of this study are as follows. First, mothers' solution-focused thinking had a significant direct and indirect positive influence on marital satisfaction through both father involvement in childcare and marital conflict. Second, the sequential mediating effects of father involvement in childcare and marital conflict were statistically significant in the relationship between solution-focused thinking and marital satisfaction. The model accounted for 60% of the variance in mothers' marital satisfaction. The results highlight the importance of solution-focused thinking that can enhance the marital satisfaction of mothers with infants and act as a resource for increasing father involvement in childcare and decreasing marital conflict. Based on the results, it is necessary to include solution-focused thinking, father involvement in childcare, and marital conflict as key elements in the intervention to improve marital satisfaction of mothers with infants.

• 대한건축학회논문집:구조계
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• 제34권2호
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• pp.75-82
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• 2018

Green roof in Korea has been recognized as part of landscape area and local governments enacted municipal ordinance for supporting green roof thereby assisting part of expenses spent for green roof within a range of budget for buildings which are eligible for the green roof support of existing buildings. However, it is necessary to enforce a regulation of mandatory green roof for new buildings in order to expand green roof application and provide a variety of assistances such as subsidy payment, tax relief, and mitigation of floor area ratio-related regulation as done in other advanced nations. In particular, LEED(Leadership in Environmental and Energy Design) in the USA applies additional point directly for green roof in terms of the reduction in heat island effects. For example, the following items are beneficial to have additional points: habitat preservation or restoration, external space, rainwater management, reduction in outdoor water usage, minimum energy performance, and optimum energy performance. In addition, the BREEAM(Building Research Establishment Environmental Assessment Method) in the UK specifies green roof as one of assessment items to be complied in terms of diversity of species. As such, LEED and BREEAM reflect direct and indirect effects of green roof on assessment criteria, which suggest a direction to green building certification criteria in Korea where only additional points are given for green roof according to soil depth.

• 디지털융복합연구
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• 제19권2호
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• pp.175-182
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• 2021

본 연구에서는 제조 및 유통 중소기업을 대상으로 ITO 실행에서 발생할 수 있는 리스크가 기업성과에 어떠한 영향을 미치는지에 대해 실증분석하였다. ITO로 비용절감이나 경쟁력을 확보하려는 중소기업들이 ITO의 리스크를 파악하고 분석하여 기업성과를 향상시키기 위한 목적으로 연구를 진행하였다. 설문조사방법으로 분석하기 위해 전략 리스크, 기술 리스크, 재무 리스크를 독립변수로 선정하였다. 그리고 관계 리스크를 매개변수로 선정하였고, 기업성과를 종속변수로 선정하여 경로분석을 실시하였다. 분석결과 독립변수로 투입된 변수들은 기업성과에 간접효과와 총효과가 있는 것으로 나타났다. 이는 전략 및 기술 리스크와 재무 리스크의 인식수준이 높을수록 관계리스크수준도 높아지게 되고, 따라서 기업성과에도 긍정적인 영향을 미치게 되는 것으로 해석할 수 있다. 향후 더 많고 다양한 리스크 요인들의 분석을 통해 기업성과를 개선할 수 있을 것으로 기대한다.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.55-66
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• 2021

The purpose of this study is to analyze the relationship and effects of variables both directly and indirectly (e.g., investment (INV), government expenditure (GE), unemployment rate (UR), economic growth (EG), and income inequality). The analytical phases consist, first, to transform the data using the Log Natural (Ln) method. Second, to check normality and multicollinearity of data. Third, to test direct effects of variables (government expenditure and investment effect on the unemployment rate and economic growth; investment on government expenditure; economic growth on unemployment rate; economic growth and unemployment rate on income inequality). Fourth, to test indirect effects using Sobel test, which involves UR and EG as intervening variable. Fifth, to test hypotheses with p-value < 0.05. The results of the study reveal that, of the 12 relationships, statistics show that 11 variations of the association have significant positive and negative effects. Theoretically, the different characters and goals of GE and INV in each country will have a different impact on EG and UR goals. The study provides an input, especially for the government. To create optimal EG through GE and INV, it is necessary to allocate budgets to industrial sectors that can absorb a massive labor force and to new economic growth sectors.

• 공업화학
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• 제22권5호
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• pp.566-574
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• 2011

석탄가스화기는 석탄가스화복합발전과 석탄간접액화 공정에서 고효율을 얻기 위한 중요한 설비 중 하나이다. 현재 여러 종류의 석탄가스화기가 성공적으로 사용되고 있지만, 간단하면서도 신뢰도를 높일 수 있는 다양한 설계 변경이 가능하다. 건식 분류층 가스화기 4종류의 형태를 제시하고 이들을 체류시간, 가스화기 출구 합성가스의 온도, 합성가스 조성을 중점으로 비교하였다. 설계개념이 적정한지를 우선 파악하고자 반응을 배제한(cold-flow) CFD 해석을 먼저 수행하였고, 실제 가스화기 조건을 반영한 화학반응이 고려된(hot-flow) 해석을 수행하여 비교하였다. 가스화기 설계에 CFD를 적용하는 데는 슬랙의 거동과 슬랙탭 설계 등 측면에서 제한적이기는 하지만, 다양한 설계개념 중에서 가능성이 높은 가스화기 형태의 범위를 좁히는 데 매우 유용하게 사용될 수 있다.

• 한국전자통신학회논문지
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• 제15권6호
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• pp.1023-1030
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• 2020

임의의 그래프 신호를 복원하기 위해 그래프상의 일부 노드로 구성된 샘플링 집합내의 노드들의 신호값만을 사용하게 되는 경우, 이를 위한 최적의 샘플링 집합 선택 문제에 대해 연구한다. 고도의 계산량을 요구하는 고유값 분해 (eigen decomposition)를 사용하지 않고, 노드를 선택하는 과정에서의 신호 변화값의 차이를 비용함수로 제시한다. 구체적으로, 기존 방식의 비용함수인 신호 복원오차를 최소화하는 대신에 본 연구에서는 신호 변화값의 차이를 비용함수로 채택하여 이를 최소화하는 간단하고 고속의 탐욕 (greedy) 샘플링 집합선택 알고리즘을 제안한다. 기존의 고속알고리즘과 성능평가 비교를 위해 다양한 그래프 신호에 대한 폭넓은 실험을 진행하여, 기존 방식 대비 신호복원 성능감소를 약 7% 이내로 유지하면서 실행시간을 10배이상으로 단축하였음을 보인다.