• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.365-368
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• 2008

The concept of "ubiquitous" has become the top issue of the 21st century communications field within the past years. u-City has become the new city paradigm with the convergence of city planning and ubiquitous communication technologies and services. Starting from 2004, KT has collaborated with the Korean government to develop comfortable, convenient, pleasant, safe, and healthy IT technology based u-City focusing on; balanced development, value creation, and improved standard of living within the region. Presently the term, "hazard mitigation services" lacks a clear definition due to its varying applications by different local agencies and has caused confusion. Therefore, this report will clarify and define u-City hazard mitigation services currently proposed to the local agencies as well as services currently in effect. Additionally, the report will introduce hazard mitigation service models feasible by KT.

• Journal of Forest and Environmental Science
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• 제34권5호
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• pp.405-411
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• 2018

Implementation of mitigation options on land is important for realisation of the goals of the Paris Agreement to stabilize temperature at $2^{\circ}C$. In India, the Intended Nationally Determined Contribution (INDC) targets include a forestry goal of creation of carbon sinks of 2.5 to 3 billion tonnes by 2030. There are however, multiple barriers to implementation of forestry mitigation options in India. They include environmental, social, financial, technological and institutional barriers. The barriers are varied not just across land categories but also for a land category depending on its regional location and distribution. In addition to these barriers is the impeding climate change that places at risk realisation of the mitigation potential as rising temperatures, drought, and fires associated with projected climate change may lead to forests becoming a weaker sink or a net carbon source before the end of the century.

• 한국안전학회지
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• 제38권3호
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• pp.43-50
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• 2023

Silicone tetrachloride (SiCl₄) leak accidents cause enormous human and environmental damage because it is highly toxic. Some handling facilities use water curtains to reduce the impact range of SiCl₄. Although the water curtain is known as one of the most efficient technologies for post-release mitigation, its effect on reducing SiCl₄ concentration needs to be investigated scientifically and quantitatively. In this study, three-dimensional computational fluid dynamics (CFD) was used to investigate the physical and chemical effects of water curtains as a release-mitigation system for SiCl₄. SiCl₄ is released and dispersed five seconds prior to the operation of the water curtain. Once the water curtain works, the SiCl₄ reacts chemically with the water and its concentration decreases rapidly; it reaches an emergency response planning guidelines level 2 (ERPG-2) of 5 parts per million (ppm) at about 570 m. We observed, however, that the physical effect of water curtains on reducing SiCl₄ concentration is insignificant when the chemical effect is eliminated. These results are crucial since they can be a scientific and quantitative basis for the 'technical guidelines for estimating the accident affected range'. In order to protect the public from chemical accidents, more toxic gas mitigation technologies need to be developed.

• 전자통신동향분석
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• 제33권1호
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• pp.101-110
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• 2018

Based on the main technologies of the 4th Industrial Revolution, industries including the smart home, transportation, agriculture, factory, energy, and medical care industries are rapidly developing. Disaster management technologies and services based on state-of-the-art convergence technologies are being widely applied for the purposes of public safety. State-of-the-art scientific technologies including the Internet of Things (IoT) are expected to offer alternative solutions to pending issues of disaster and safety. Particularly in disaster management, a "prevention activity"to avoid and control disasters in advance is essential, and thus disaster prevention and safety monitoring technologies based on hyper-connected intelligence are fundamental for society during the 4th Industrial Revolution. IoT technologies are being actively applied and utilized in various fields to prevent social and natural disasters. In this article, we introduce the development trends of disaster prevention and safety monitoring technologies based on IoT technologies.

• 청정기술
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• 제20권4호
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• pp.439-448
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• 2014

포항철강산업단지의 온실가스 잠재 감축량에 대한 연구를 수행하였다. 2010년 기준 철강산단의 온실가스 배출량은 4,174,000~4,574,000 $tCO_2-eq$로 추정되고, 정부의 온실가스 감축 목표를 달성하기 위해서 2020년까지 최소 552,000 $tCO_2-eq$의 온실가스 감축이 요구된다. 온실가스 잠재 감축량을 추정하기 위하여, 자발적 온실가스 감축사업에 등록된 사례 기술들을 온실가스 목표관리제도 대상으로 지정된 51개 기업의 공정에 적용하였다. 기술적 용이성과 투자비 회수기간 측면에서 분석한 결과, 연료전환과 폐열회수를 이용하여 단기적으로 160,000 $tCO_2-eq$를 감축할 수 있는 것으로 예상된다. 중기적으로는 철강금속 산업 분야에 적용 가능한 열 부문과 전기 부문 기술을 이용하면 각각 229,000과 125,000 $tCO_2-eq$를 감축할 수 있을 것으로 예상된다. 온실가스 예상 목표 감축량 대비 중 단기 기술로 달성할 수 없는 차이(38,000 $tCO_2-eq$)에 대해서는 장기적으로 근본적인 공정 혁신과 최신 설비 및 신재생에너지 기술 도입을 통한 감축 노력이 필요하다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권4호
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• pp.1841-1865
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• 2017

This paper proposes a new interference mitigation scheme for device-to-device (D2D) communications underlaying a cellular network. The object of the proposed scheme is to determine the number of data streams, a precoding matrix, and a decoding matrix of D2D networks so as to maximize the system capacity given the number of data streams of a cellular network while satisfying the constraint of the inter-system interference from D2D networks to the cellular network. Unlike existing interference mitigation schemes based on the interference alignment technique, the proposed scheme operates properly regardless of the number of data streams of a cellular network and moreover it does not require changing the precoding and decoding matrices of a cellular network. The simulation results demonstrate that the proposed scheme significantly increases the system capacity by mitigating the intra- and inter-system interference.

• 한국기후변화학회지
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• 제8권1호
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• pp.57-62
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• 2017

Greenhouse gas (GHG) emissions of private industry of Chungcheongbuk-do were estimated. GHG emissions were classified by industry and GHG emissions ratio of each industry of Chungcheongbuk-do was found. Characteristics of GHG emissions of Chungcheongbuk-do and GHG mitigation technology were analyzed. To calculate GHG emissions, equations proposed through GHG emissions calculation guidelines published by Korean Energy Agency in 2009 were used. As a result, GHG emissions ratio of cement, semiconductor, paper and petrochemical industry was about 73%, 16%, 5%, and 2% respectively. GHG mitigation technologies of cement, semiconductor and waste were investigated. For cement, amine technology, for semiconductor, scrubber system and for waste, land fill gas utilization were analyzed.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년도 제30회 춘계학술대회논문집
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• pp.213-216
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• 2008

예기치 않은 외적인 자극에 의한 사고를 막기 위하여 에너지 물질을 함유한 전술 유도무기의 위험성을 감소시킬 필요성이 증대되어, 유도무기 둔감화에 대한 연구가 미국과 나토에서 1980년대 후반부터 활발히 시작되었다. 로켓모터의 둔감성능을 향상시키기 위해서는 추진제를 비롯하여 로켓모터의 모든 부품들이 적절한 조합으로 각각의 특성을 살려 둔감성능 향상에 도움이 되도록 설계되어야 하며 각각의 부품이 어떤 역할을 하는지 이해하여야 한다. 고체 추진기관 둔감화에 필요한 중요한 역할을 하는 구성 요소는 추진제, 연소관, 점화기 및 완화장치 등이 있다.

• 한국항공우주학회지
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• 제43권9호
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• pp.845-857
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• 2015

최근 우주쓰레기로 인한 우주환경 악화에 대한 국제적인 관심이 높아지고 있으며, 미국, 프랑스, 일본 등 우주개발 선진국들을 중심으로 우주파편 경감을 위한 가이드라인을 제정하여 준수하고자 노력하고 있는 추세이다. 이러한 노력과 더불어 우주파편을 직접 제거함으로써 그 숫자를 경감하고자 하는 기술을 '우주파편 능동제거 기술'이라고 한다. 본 논문에서는 우주파편 경감을 위한 해외 기관들의 연구동향과 배경들을 살펴보고 관련 기술개발 사례 및 특허들을 분석하였다. 또한, 이를 바탕으로 우주파편 능동제거시스템 개발을 위한 소요기술들을 분석해봄으로써 우리나라에서도 관련 연구에 관심을 가지고 본격적으로 시작하고자 하는 연구자들에게 선행연구 분석 자료로써 유용하게 활용될 수 있도록 하였다.

• 대한기계학회논문집B
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• 제29권11호
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• pp.1229-1238
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• 2005

The objective of the present study was to investigate the efficacy of physical water treatment (PWT) technologies using different catalytic materials and an electronic anti-fouling device in the mitigation of mineral fouling in a once-through flow system with mini-channel heat exchanger. Effects of flow velocity and water hardness on the effectiveness of PWT technologies were experimentally studied. The artificial water hardness varied from 5.0 to 10 mo1/m$^{3}$ as CaCO$_{3}$. For 10 mo1/m$^{3}$ solution, fouling resistance reduced by 13-40$\%$ depending on flow velocity and types of PWT devices. On the other hand, fouling resistance reduced by 21-29$\%$ depending on the PWT devices for 5 mo11m3 solutions. The PWT device using alloy of Cu and Zn as catalyst (CM2) was slightly more effective than the others. SEM photographs of scale produced from the 10 mol/m$^{3}$ solution at 1.0 m/s indicated that calcium carbonate scales without PWT devices were needle-shaped aragonite, which is sticky, dense and difficult to remove. Scales with the PWT devices showed a cluster of spherical or elliptic shape crystals. Both the heat transfer test results and SEM photographs strongly support the efficacy of PWT technologies using catalytic materials and an electronic anti-fouling device in the mitigation of mineral fouling.