• Nuclear Engineering and Technology
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• 제54권6호
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• pp.2011-2022
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• 2022

According to the defense-in-depth concept, not only a preventive strategy but also an integrated cyberattack response strategy for NPPs should be established. However, there are limitations in terms of responding to penetrations, and the existing EOPs are insufficient for responding to intentional disruptions. In this study, we focus on manipulative attacks on process data. Based on an analysis of the related attack vectors and possible attack scenarios, we adopt the Kalman filter to detect process anomalies that can be caused by manipulations of process data. To compensate for these manipulations and secure MCR operators' situational awareness, we modify the Kalman filter such that it can filter out the effects of the manipulations adaptively. A case study was conducted using a hardware-in-the-loop system. The results indicated that the developed method can be used to verify whether the displayed safety-related state data are reliable and to implement the required safety response actions.

• Nuclear Engineering and Technology
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• 제55권4호
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• pp.1410-1419
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• 2023

Public perception plays a crucial role in the successful completion of a nuclear power project. As a newcomer country to nuclear power, there are lots of misconceptions among the Bangladeshi people about nuclear energy. Consequently, it is crucial to minimize all the doubts among mass people and build up their positive outlook toward nuclear power. This demands a comprehensive survey to figure out the public opinion, concerns, false impressions, and knowledge gap regarding nuclear power. In the present study, these issues were addressed by a survey that was responded to by 661 persons for the 24 survey questions. The questions were categorized based on information, knowledge, faith, benefit, awareness, and technology. Feedback and responders' basic demographic and socioeconomic information were collected from various locations in Bangladesh through online and in-person surveys. The responses were analyzed in both statistical and descriptive ways. Some of the feedback was found to vary with age, sex, and education level while others were quite independent of these parameters. It is found that socioeconomic development and energy security can be achieved by the inclusion of nuclear energy in the power system master plan of the country. However, huge knowledge gaps and misconceptions were found among the public regarding nuclear energy. As per feedback, political instability and corruption may affect the national nuclear power project in Bangladesh. Low faith in the existing rules & regulations for nuclear power programs was also observed. The result of this study will be handy to develop the communication and public awareness strategy for a successful nuclear power project in Bangladesh.

• 한국보육지원학회지
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• 제14권1호
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• pp.63-85
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• 2018

Objective: The goal of this study is to examine child care center teachers'awareness of parents through a metaphor analysis. Methods: Metaphorical expressions and reason-statements were collected from 276 teachers. Metaphor analysis was used through categorizing and assorting by meanings. Results: The teachers' metaphorical image expressions of parents were analyzed by using 13 metaphorical expression words and 3 categories which included, influence on teacher's attitudes, parent-teacher relationships, and parents' attitudes. Metaphorical image expressions that had a high ratio were 'a companion' and 'a client.' First, child care center teachers had images of parents that parents provide courageous energy to them, and images of clients who demand service instead of being parents. Second, child care center teachers had images of parents that parents cooperate with teachers for the sake of their children. Third, child care teachers had images of parents that parents need help with their children. Conclusion/Implications: This study suggests that teachers will be able to positively correct their awareness of cooperative parent-teacher relationships by reviewing their metaphorical expressions of parental images.

• 한국지능시스템학회논문지
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• 제22권2호
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• pp.148-153
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• 2012

본 논문에서는 무선 센서 네트워크에서 실시간 대용량 데이터를 전송하고자 할 때 QoS 요구조건과 에너지 효율성 요구를 만족시킬 수 있는 간섭 인지 기반의 결함 허용 QoS 라우팅 기법을 제안한다. 제안된 기법에서는 처리량을 최대화하고 지연시간을 최소화하기 위해 간섭비율과 예측전송시간을 기반으로 하는 새로운 누적 경로 메트릭을 사용하여 전송 경로에 결함이 발생하더라도 최적의 전송경로를 결정하도록 한다. 마지막으로, 시뮬레이션을 통하여 제안된 라우팅 기법을 사용하면 네트워크 처리량 및 지연시간 측면에서 성능이 향상됨을 보인다.

• 토지주택연구
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• 제4권4호
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• pp.395-406
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• 2013

본 연구는 주택점유형태별 주택에너지의 소비 및 절약의식, 사용형태와 향후 주택에너지 절감을 위한 정책방향을 파악하고자 한다. 분석결과는 다음과 같다. 첫째, 점유형태별로 평균값의 차이가 존재하는 것으로 나타났다. 둘째, 자가, 민간 임대 및 공공임대 거주자는 에너지 소비 및 절약의식을 잘 실천하고 있었다. 셋째, 에너지절약행위항목에서 자가주택과 임대주택거주자의 행위에 있어서는 행동의 차이가 존재하였다. 마지막으로 향후 정책방향은 소비자 중심의 인센티브 방안이 더 효율적이고 효과적으로 활용될 것이다.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.79-90
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• 2021

This study aims to investigate the relationship between urbanization, economic growth, energy consumption, and CO2 emissions in Indonesia. The data used in the study are time-series data for the period 1985-2017; the data utilized are sourced from World Development Indicators obtained on the World Bank database. The method uses a quantitative approach that applies the vector error correction model based on the Granger causality test. The empirical results reveal that, in the short run, there is evidence that urbanization and energy consumption can causes CO2 emissions, and they also prove that urbanization can cause energy consumption. Also, other findings prove the existence of long-run relationships flowing from energy consumption, economic growth, and CO2 emissions toward urbanization, as well as the existence of the relationship flowing from urbanization, economic growth, and CO2 emissions towards energy consumption. The results of testing the relationship between economic growth and CO2 emissions reveal that the environmental Kuznets curve hypothesis is proven in Indonesia. Thus, policies are needed to limit the impact of urbanization through high awareness-raising to maintain environmental quality and greater use of energy. Also, energy conservation policies are needed in all sectors, especially the electricity, industry, and transportation sectors.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.257-262
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• 2009

In green building certificated housing complex, although various planning factors in terms of 'Energy resource and Environmental impact' were adopted, the residents' consciousness for their economical and psycholgical effect has not been found. Therefore, the purpose of this study was to find out the usability of environment-friendly factors, with regard to the aspects of 'energy resource and environment impact' and residents, consciousness for them in order to provide the useful information to design the user-oriented green building house complex better than previous ones. the finding were summarized as follows: 1)Increasing awareness of 'green building certificated housing complex', Resident should feel contribution to the environment. 2)When mass housing planning, the development of sensible certification is required. 3)Green building certificated housing complex should change from 'certification for the Financial compensation' to 'certification for the Contribution to the environment'.

• Wind and Structures
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• 제30권5호
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• pp.511-524
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• 2020

Advancements in materialistic life styles and increasing awareness about adverse climatic changes and its negative effects on human life have been the driving force of finding new and clean sources of energy. Wind power has become technologically mature and commercially acceptable on global scale. However, fossil fuels have been the major sources of energy in most countries, renewable energy (particularly wind) is now booming worldwide. To cope with this wind energy technology, various related aspects have to be understood by the scientific, engineering, utility, and contracting communities. This study is an effort towards the understanding of the (i) wind turbine blade and tower structural stability issues, (ii) turbine blade and tower failures and remedial measures, (iii) weather and seismic effects on turbine blade and tower failures, (iv) gear box failures, and (v) turbine blade and tower failure analysis tools.

• Journal of Information Processing Systems
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• 제5권4호
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• pp.175-186
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• 2009

Power consumed by modern computer systems, particularly servers in data centers has almost reached an unacceptable level. However, their energy consumption is often not justifiable when their utilization is considered; that is, they tend to consume more energy than needed for their computing related jobs. Task scheduling in distributed computing systems (DCSs) can play a crucial role in increasing utilization; this will lead to the reduction in energy consumption. In this paper, we address the problem of scheduling precedence-constrained parallel applications in DCSs, and present two energy- conscious scheduling algorithms. Our scheduling algorithms adopt dynamic voltage and frequency scaling (DVFS) to minimize energy consumption. DVFS, as an efficient power management technology, has been increasingly integrated into many recent commodity processors. DVFS enables these processors to operate with different voltage supply levels at the expense of sacrificing clock frequencies. In the context of scheduling, this multiple voltage facility implies that there is a trade-off between the quality of schedules and energy consumption. Our algorithms effectively balance these two performance goals using a novel objective function and its variant, which take into account both goals; this claim is verified by the results obtained from our extensive comparative evaluation study.

• 보건교육건강증진학회지
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• 제30권3호
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• pp.1-12
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• 2013

Objectives: The objective of this study was to investigate the patterns of energy drink consumption and associated factors in a group of college students in South Korea. Methods: Cross-sectional, self-report survey data were collected from 231 college students in November of 2012 and were analyzed by logistic regression. Results: Students consuming energy drinks accounted for 81.8% of the entire sample and 40.3% of the sample reported that they mixed with alcoholic drink. The most common reason for drinking an energy drink was "To stay awake", followed by "To relieve fatigue". In logistic regression analysis, statistically significant predictors of energy drink consumption was alcohol drinking behavior. Conclusions: Consumption of energy drinks has been quite common in college students. Awareness of college students regarding potential health effects of energy drinks, in particular, those of mixing alcoholic beverage, should be increased through health education.