• 대한전기학회논문지:전력기술부문A
• /
• 제53권5호
• /
• pp.275-284
• /
• 2004

This paper analyzes the environmental impact and economic effect of introducing the Renewable Portfolio Standard (RPS) into Korean electricity market using the DECADES (Database and Methodologies for Comparative Assessment of Different Energy Source for Electricity Generation) model, a comparative assessment tool developed by IAEA. A bottom up approach is adopted for the evaluation of air pollutant emission and its impact of several RPS scenarios. The environmental damage costs of RPS scenarios are evaluated based on the Extern-E results and Thailand externality study carried by EGA T. The results of this study can be applied in determining or analyzing the national electricity policy and energy policy.

• 해양환경안전학회지
• /
• 제25권3호
• /
• pp.395-403
• /
• 2019

This paper compares the marine engineering courses of two maritime institutions: Mokpo National Maritime University of Korea in the East Asia region and Philippine Merchant Marine Academy in the Southeast Asia region. It shows examines educational marine engineering programs, along with the different divisions and courses at each college. It demonstrates a divergence in methodologies and course offerings to cultivate competitive graduates. The comparative assessment completed is intended to offer broader knowledge on how each institution tackles the requirements of the STCW, and to meet the present and future demands of the maritime industry. Different course offerings are compared along with the units and hours allocated to each subject, and the differences in marine engineering academic and training requirements to graduate. Students must satisfactorily earn 150 units to complete their choice of major. Statistical procedures were used in this assessment and analysis from Excel programs.

• 대한안전경영과학회지
• /
• 제17권3호
• /
• pp.239-246
• /
• 2015

Enforced environmental regulations call for extending the domain of manufacturers' responsibility to the entire product life cycle. To comply with the environmental regulations, manufacturers have constructed reverse logistics networks to re-collect their leftover waste for recycling consumed resources. However, the operational activities associated with storage, loading and transportation processes within the networks inevitably impose environmental burdens. Particularly, the transportation process largely influences environmental performance due to perpetual uses of transportation vehicles. Therefore, there is a need to develop an environmentally-conscious transportation model that can efficiently manage the uses of transportation vehicles. Additionally, it is vital to analyze its significances of environmental performance to compare quantitatively it with existing models. This paper proposes a transportation model for improving environmental performance in a reverse logistics network. This paper also presents a case study to perform its comparative analysis using Life Cycle Assessment that evaluates potential environmental impacts of a product system.

• 한국포장학회지
• /
• 제29권3호
• /
• pp.181-193
• /
• 2023

In this study, we conducted a comparative life cycle assessment (LCA) of two different products, considering reusable and single-use packaging for fresh food distribution. For reusable packaging, we utilized expanded polyethylene (EPE), while for comparison, a disposable box made of widely used expanded polystyrene (EPS) was selected. We comprehensively analyzed the environmental impacts of production, transportation, reprocessing (for reused boxes), and disposal across 18 impact categories. Upon analyzing the actual reuse of 300 rounds of fresh food, the cumulative global warming potential (GWP) values for the EPE box were found to be 280.21 kg carbon dioxide (CO₂) eq, demonstrating a significant 75% reduction compared to those of the EPS box. Furthermore, it was observed that the GWP values for the EPE boxes became equivalent to those of the EPS boxes after 12 rounds of reuse. In conclusion, reusable packaging shows substantial potential to contribute to the reduction of environmental burdens, aligning well with global environmental requirements for sustainable food distribution and related industries.

• 공학교육연구
• /
• 제14권2호
• /
• pp.13-20
• /
• 2011

본 연구의 목적은 한국과 미국의 프로그램 학습성과 평가체계 사례를 비교 분석함으로써 프로그램 학습성과 평가체계 개선을 위한 시사점을 제공하는 것이다. 연구의 목적을 달성하기 위해 사례연구방법이 적용되었다. 미국에서 공학교육인증을 우수하게 수행하고 있는 5개 대학 프로그램과 한국에서 공학교육혁신센터를 주축으로 연구를 수행하여 프로그램 학습성과 평가체계를 개선한 3개 대학을 선정하여 각각의 프로그램 학습성과 평가체계 사례를 분석하였다. 분석 결과 각 프로그램에서 설정한 학습성과, 학습성과를 평가하는 수준, 학생의 학습성과 달성도 평가 방법, 분석 및 개선 실적 측면에서 차이가 있는 것으로 나타났다. 연구 결과에 기반하여 프로그램 학습성과 평가체계 개선을 위해서는 학생의 학습성과 달성도 평가방법에 대한 관심보다는 프로그램의 특성이 반영된 학습성과 설정, 학습성과 평가결과 분석 및 개선에 대한 보다 구체적인 계획 수립, 수집된 자료에 근거하여 교육과정을 지속적으로 개선하는 데 보다 노력을 기울일 것을 제안하였다.

• 동의신경정신과학회지
• /
• 제7권1호
• /
• pp.15-37
• /
• 1996

This thesis investigates 220 female students ranging from 19 to 26 years old attending universities in the Wonju area to determine the correlations between mental health and the density of serum iron . According to their serum iron levels, they were divided into three groups and analyzed with the GARS Scale Assessment and the THI Test Assessment. The results are as follows;1. On the comprehensive GARS Scale tests, for all groups, task, occupation and levels of university-related frustration(1) marked the highest scores.2. On the comparative assessment of each group's GARS Scale scores, Group A showed higher stress perception in terms of personal relationship(2,3) than any orther groups. 3. On the comprehensive THI test scores coverring all groups, Multiple subjective symptoms(I) marked the highest scores. 4. On the comparative assessment of each group's THI test scores, Group A showed higher Multiple subjective symptoms(I) and Irregularities of life(G) than any orther groups.5. Comparing and analyzing the GARS Scale Assessment and the THI Test, we found that Group A showed high stress perception, which may cause psychosomatic diseases such as 'yu zheng(鬱證;melancholia). With those results, we can see that the contant of serum iron is correlated to stress perception and the condition of mental health. In the future studies using the GARS Scale and the THI Test, it will be necessary to examine more subject groups in terms of multi-aspects and to investigate the standard group in more detail.

• 방송공학회논문지
• /
• 제26권5호
• /
• pp.621-642
• /
• 2021

본 논문에서는 현재 방송 중인 Full HD, Up-scaling UHD, 4K UHD Native의 세 가지 콘텐츠품질을 대상으로 일반 가정의 TV 시청거리인 2.5m 거리에서 55, 65, 75인치 세 가지 크기의 TV수상기를 이용하여 주관적 화질평가를 실시하였다. 본 화질평가 실험은 화질평가 응답이 부적합한 4명의 데이터를 제외한 169명의 데이터를 대상으로 SPSS 25.0를 이용하여 콘텐츠품질이 성별, 수상기 크기, 선호프로그램 장르에 따른 영향을 분석하였다. 또한 측정기를 통한 객관적 화질평가와 주관적 화질평가 결과도 비교 분석하였다.

• 비교교육연구
• /
• 제28권5호
• /
• pp.1-19
• /
• 2018

국제 수학 과학 성취도 추이 연구와 같은 교육평가의 목적은 국가와 같은 집단을 비교하는 것이다. 이와 같이 평가의 단위가 학생보다 상위 수준일 때 집단을 비교하기 위해서는 다층 문항반응이론 기반의 집단 수준 진단평가 모형을 고려할 수 있다. 이 연구에서는 Park과 Bolt(2008)가 제안한 문항특성모형을 수정하여 새로운 다층 문항반응이론 기반의 집단 수준 진단평가 모형을 제안하였다. 이 수정된 모형은 2015년에 실시된 국제 수학 과학 성취도 추이 연구의 8학년 수학 평가 자료에 적용되었다. 그 결과 9개의 인지적 요소에 대한 국가들의 프로파일을 구할 수 있었다. 이 연구 결과는 국가 간 비교 또는 요소 간 상호 비교에 이용될 수 있다. 이와 같이 잔차항을 설명할 수 있도록 수정된 모형은 보다 높은 신뢰도를 지니며 국가 간 비교에 보다 정확한 정보를 제공할 수 있을 것으로 기대된다. 예를 이용하여 연구 결과를 어떻게 해석할 수 있는지 제시하였으며, 연구의 제한점과 후속 연구에 대해서도 논의하였다.

• 한국안전학회지
• /
• 제34권1호
• /
• pp.62-69
• /
• 2019

Korean shipbuilding companies have taken many efforts for safety over the years by developing Health, Safety & Environment (HSE) Management Systems, Procedures, Training, and studying Programs for prevention of incidents. As a result, the shipbuilding industry has succeeded in reducing overall injury rates. Nevertheless, the industry also noticed that incident rates are still not at zero and more importantly, serious injuries and fatalities are still occurring. One factor that may be attributing to this is the lack of managing potential severity during incident investigations, most incident investigations are implemented based on the actual result. Generally, each shipbuilding company develops their customized incident investigation programs and these are also commonly being focused on actual result. This study aimed to develop a shift in strategy toward safety to classify the criteria of potential severity from any incidents and manage that to prevent any recurrence or causing any serious injuries or fatalities in the shipbuilding industry. Several global energy companies have already developed potential severity management tools and applied them in their incident investigations. In order to verify the necessity of improvement for current systems, a case study and comparative analysis between a domestic shipbuilding company and several global energy companies from foreign countries was implemented and comparison of two incident investigation cases from specific offshore projects was conducted to measure the value of a potential severity system. Also, a checklist was established from the data of fatalities and serious injuries in recent 5 years that occurred in Korea shipbuilding industry and a proposal to verify high potential incidents in the incident investigation process and comparative analysis between the assessment by appling proposed checklist and the assessment from a global energy company by using their own system was implemented. As a measure to prevent any incidents, it is required to focus on potential severity assessment during the incident investigation rather than to only control actual result. Hence, this study aims to propose a realistic plan which enables to improve the existing practices of incident investigation and control in the shipbuilding industry.

• 한국측량학회지
• /
• 제35권5호
• /
• pp.375-388
• /
• 2017

United States of America started NSDI in 1994 for the first time in the world. EU and other many countries invested lots of budget on NSDI due to necessity to manage countries and social economy. As skepticism for effect of such investment has risen, developed countries predicted higher effect compared to investment using ROI and other methods. FGDC clarified that geospatial information is a critical national assets. USA has managed NSDI by introducing portfolio concept for it recognizing NSDI as financial assets from fixed assets. Currently directions of NSDI and its advancement has been proceeded variably depending on corresponding organizations, human resources, budget and national policies. This study analyzed recent trends regarding NSDI assessment methods from developed countries and researchers. Assessment of NSDI is introduced only by some countries such as EU, USA and Canada. This study analyzed USA's assessment model and indicator that assess NSDI in a way that various external organizations (COGO, URISA) participate, EU INSPIRE Directives, monitoring and Canada's CGDI assessment methods. Besides these, this study analyzed STIG that adopted Financial Infrastructure from European studies and Korea's NSDI monitoring assessment indicator research. Further this study suggested assessment directions for future NSDI through implications of NSDI assessment method analysis.