• 한국가정과교육학회지
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• 제22권1호
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• pp.79-96
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• 2010

본 연구의 목적은 청소년의 가족건강성에 따른 금전사용양식과 금전관리행동의 차이를 검증하는데 있다. 자료분석에는 고등학생 914명이 응답한 설문지를 사용하였으며, 통계분석방법으로는 신뢰도계수(Cronbach'$\alpha$) 산출, t검정, 일원분산분석과 사후검정으로 Duncan의 다중비교분석을 실시하였다. 연구결과는 다음과 같이 요약할 수 있다. 조사대상 청소년의 기족건강성 점수는 3.36(5점 만점)으로 중간정도의 성향을 보였다. 금전사용양식은 안정형, 과시형, 무관심형으로 구성되었으며 무관심형의 평균이 3.33, 안정형은 3.01, 과시형은 2.91이었다. 금전관리행동은 계획, 수행, 평가, 저축으로 이루어졌으며, 계획이 2.81점, 실행이 2.87점, 명가가 2.90점, 저축이 2.50점으로 나타났다. 가족건강성이 높은 청소년은 금전을 통해 안정을 추구하는 경향과 과시를 추구하는 경향이 높았다. 청소년의 가족건강성 지각은 자신의 금전관리행동에도 유의한 정적 차이를 나타내어 자신의 가정을 건강하게 지각할수록 합리적인 금전관리행동을 하였다.

• 설비공학논문집
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• 제28권11호
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• pp.421-427
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• 2016

The indoor temperature of a building increases during the day due to solar radiation. This behavior is significant in school buildings that are finished with high thermal capacity materials. Moreover, in school buildings, windows cannot be opened until the class has finished owing to the security policy of schools. Consequently, classrooms maintain a high temperature throughout the morning. It is thus important to remove the indoor heat before the commencement of classes in order to reduce the cooling energy needed. The Energy Recovery Ventilator (ERV) system is currently being installed in school buildings for ventilating the classrooms. Night-purge control using ERV can be a good strategy to cool the classroom in advance of the operation of the cooling system. However, the optimal operation method of the ERV for night-purge control has not yet been reported. In this study, the effect of night-purge control with ERV in school buildings is analyzed by simulation method. The results of this study showed that the energy saving effect of night-purge control with ERV is most effective in the case of 2 hours operation prior to the commencement of the first lass and when enthalpy based outdoor air cooling is used.

• 경영정보학연구
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• 제17권1호
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• pp.93-115
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• 2015

스마트폰의 획기적인 사용량 증가에 따라 모바일 앱은 에너지 절감과 같은 공공 영역에서의 인간행동변화를 가져오는 유력한 방법이 되었다. 이를 위해 앱과 행동 변화 간의 관계성을 인식하는 것은 공공 기관으로 하여금 보다 더 효과적인 공공 커뮤니케이션 전략을 수립하는데 유용한 활동이다. 본 연구는 디자인 과학 접근법을 기반으로 하여 개인화, 접근성, 표현의 풍부성과 같은 공공 서비스 중심의 모바일 앱의 디자인적 요인들이 사용자의 인지적, 감성적 태도에 미치는 영향을 조사하는 것이다. 분석 결과 대부분의 디자인적 요인들이 사용자의 인지적 감성적 태도에 유의한 영향을 주는 것으로 밝혀졌다. 또한, 인지적 태도는 사용자의 행동 변화와 감성적 태도에 영향을 미치며, 한편 감성적 태도는 공공 모바일 앱의 평균 사용시간과 에너지 절감이라고 하는 행동 변화에 긍정적인 작용을 하는 것으로 나타났다.

• 에너지공학
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• 제29권1호
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• pp.25-33
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• 2020

최근 제로에너지건축물 의무화 정책이 추진됨에 따라 Zero Energy School로의 전환을 위한 정책/제도들이 추진되고 있으나 학교 건물에 대하여 에너지절감 활동결과 그 성과를 체계적으로 분석, 검증할 수 있는 방법이 제시되어 있지 않는 상황이다. 에너지성과 검증방법론 연구를 위하여 관련 유사표준들의 현황을 참고하였으며, 그 외 방법론들의 사례 조사를 통해 현장에서 성과를 분석해 볼 수 있는 Tool에 대한 검토와 더불어 국내 학교 현장방문을 통한 에너지관리 실태 및 특성을 분석하였다. 본 논문에서는 신규, 기존학교 건물에서의 냉난방설비, 조명, 단열 강화, 운영행태 변경, 운전방법 개선 등 각종 에너지절약사업의 수행과 에너지절약사업 이행 전·후의 에너지절감량을 검증할 수 있는 M&V 방법 등에 대하여 제시하였다.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2189-2196
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• 2015

환경오염 및 유류비가 증가함에 따라 선박 에너지 절감 방안에 대한 연구가 활발히 진행되고 있다. PCS(Pump Control System)는 선박냉각시스템에서 해수펌프 회전속도, 청수펌프 회전속도 및 3-Way V/V 위치 제어를 통해 에너지를 절감하는 펌프제어시스템이다. 본 논문에서는 PCS의 신뢰성 확보를 위해 실 선박의 냉각시스템과 유사한 환경을 갖춘 PCS 시뮬레이터를 개발하였다. 또한 PCS 시뮬레이터를 위한 컴퓨터 기반의 제어 시스템 및 데이터 저장시스템을 개발하였다. 제어 및 데이터 저장시스템 개발에는 National Instrument 사의 cDAQ 및 LabVIEW를 사용하였다. 최종적으로 저장된 데이터를 분석하여 시뮬레이터의 동작을 확인하였다.

• 유통과학연구
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• 제17권11호
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• pp.63-72
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• 2019

Purpose: Black Friday is a globally used as a promotion event. A lot of South Korean retailers also have used it as their promotion concepts. But South Korean Consumers' response to Black Friday has never been investigated academically. This study examined Black Friday shopping of South Korean consumers, including experiences, perceptions, motives and shopping mechanism. Research design, data and methodology: To verify the purposes of this research, a survey was conducted with 462 participants. This study analyzed descriptive features of experiences, perceptions and motives and developed and tested the model of shopping mechanism. Results: South Korean consumers perceive Black Friday as one of the credible marketing tactics offering a big price discount. They have generally positive perceptions and shopping experiences toward Black Friday. The key motive of Black Friday shopping is for saving cost. In addition, for South Korean consumers, perceived deal value, perceived innovativeness, saving cost motive and fun motive are important antecedents of shopping on Black Friday, and attitude toward Black Friday plays a mediating role between antecedents and shopping behavior. Conclusions: The findings of this study provide practical and theoretical insight to understand the impact of Black Friday in South Korea.

• 한국철도학회논문집
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• 제9권1호
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• pp.43-49
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• 2006

We have evaluated the structural integrity of a sandwich composite train roof structure that can be a lightweight, cost saving solution to large structural components for rail vehicles in design stages. The sandwich composite train roof structure was 11.45 meters long and 1.76 meters wide. The finite element analysis was used to calculate the stresses, deflections and natural frequencies of the sandwich composite train roof against the weight of air-conditioned system. The 3D sandwich finite element model was introduced to examine the structural behavior of the hollow aluminum extrusion frames joined to both sides of the sandwich composite train roof. The results shown that the structural performance of the sandwich composite train roof under loading conditions specified is satisfaction and the use of aluminum reinforced frame and aluminum honeycomb core is beneficial with regard to weight saving and structural performance in comparison with steel reinforced frame and polyurethane foam core. Also, we have manufactured prototype of sandwich composite train roof structure on the basis of analysis results.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.291-296
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• 2009

This paper investigates the energy saving potentials of a dedicated outdoor air system (DOAS) applied to a highrise apartment building. As for a typical $132-m^2$ apartment unit, two different HVAC systems; centralized DOAS-Ceiling Radiant Cooling Panel and decentralized Energy Recovery Ventilator-Packaged Air Conditioner were installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program, and annual cooling coil load and heating load reduction potentials were compared. The research shows that DOAS-Ceiling Radiant Cooling Panel system can reduce the cooling coil load over 21% annually compared with the current Energy Recovery Ventilator-Packaged Air Conditioner pair. In addition, over 40% of annual ventilation heating load can be reduced by use of DOAS.

• 한국표면공학회지
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• 제27권4호
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• pp.207-214
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• 1994

In consideration of global environmental protection and fuel saving, aluminum alloy sheets for auto body panels such as hood, fender etc., are expected one of the most promising materials for weight saving of cars. The chemical conversion coating is required to prevent the filiform corrosion occurring on painted aluminum. However the conventional process for the composited material mixed with aluminum and steel is complexs; aluminum part is chromated and assembled to the body, and then the steel body undergoes Zn phosphating. In order to overcome the low productivity due to the complex process and the environmental problem with a conventional process, a simultaneous zinc phosphating process for alsuminum and steel in an assembled condition is demanded. Newly developed phosphate solution has been investigated to characterize the phosphating behavior under various conditions. The optimum conditions of the phosphating solution for the application of the paint treatment derived as follows : about 0.3 for the ratio of Zn to $PO_4$, , 200~500 ppm for the concentration of fluoride ion, and 2.5~4.0 for pH. The concentration of dissolved aluminum ion must be kept below 2--ppm and suitable accelerator is found to be a mixture of 1g/$\ell$ $NO_2\;^-$, and 6g/$\ell$ $NO_3\;^-$.

• 한국식품조리과학회지
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• 제27권4호
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• pp.75-87
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• 2011

This study was conducted to examine the effect of children's dietary quality, dietary habits, food behavior and health-related lifestyles according to the mother's lifestyles of health and sustainability (LOHAS). The subjects were 580 children. Mother's LOHAS attitude index was 66.85 points and 100 points was a perfect score. The mother's high LOHAS attitude items that children perceived were "My mother often communicates with the family"(3.99 points) and "My mother thinks that the family's health is more important than her health"(3.93 points). In contrast, the LOHAS attitude items for "My mother does community service activity on weekends"(2.78 points), and "My mother participates in environmental protection service activity for the local community"(2.78 points) were very low. The high LOHAS behavior index of mothers was "resource saving", whereas "social welfare" scored low. When self-perceived health status and monthly income of children was high, the mother's LOHAS score was high. The LOHAS attitude index of mothers had a meaningful impact on the children's dietary quality, dietary habits, food behavior and health-related lifestyles. The most frequent food behavior variables were "high skipping rate", "frequency of snacks is 2~4 times per week", "speed of eating is rapid", and 'meals' amount is sufficient. The highest daily life habits item was "I try to maintain a pleasant and enjoyable life style"(3.42 points). The highest nutrient intake attitude score was "I tend to eat rice everyday."(3.41 points). They were highly recognized with "moderate physical activity", "high exercise preference", "positive posture exercise", "exercise <2 days per week", and "over 30 minutes exercise time per day" for the exercise performance status items. It was verified that the higher mother's LOHAS lifestyle score is, the higher children's food behavior, daily life habits, nutrient intake, exercise performance state score are.