• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.351-353
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• 2022

국내와 국외를 통틀어서 현재까지 원전사고가 수차례 있었고 이로 인한 크고 작은 피해가 있었다. 해외는 이러한 사고를 줄이기 위해서 형상관리라는 기술을 도입하여 원전 운영에 대한 안전성과 신뢰성을 향상 시켜왔다. 본 논문에서는 형상관리에 관한 기본적인 정보와 국외 원전의 형상관리 도입 성공사례들을 통해서 국내에 적용 가능한 기술적 부분을 확인하고 이를 국내 원전에 맞게 보완하여 새로이 적용할 수 있는지를 알아본다.

• 한국환경생태학회지
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• 제11권1호
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• pp.37-45
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• 1997

지리산국립공원 노고단 지역에 분포하는 아고산대 초원지역은 급증한 이용객들에 의해 훼손되고 있다. 교란된 아고산대 초원지역의 복원공법을 개발하기 위한 기초연구로서, 이 지역에 시비처리, 식생도입처리, 멀칭처리를 각각 2수준으로 한 2*2*2 요인 실험을 표토가 유실된 10% 경사지와 표토가 잔존하는 40% 경사지에 실시하였다. 그 결과, 부지조건에 관계없이 야생풀포기심기가 파종보다 식생활착에 있어 더 효율적이었고 시비처리는 출현개체수와 피복도 증가에 통계적 유의성을 나타냈다. 반면 식생활착에 미치는 멀칭재료간 효과는 유의성이 없었다. 한편 척박지의 선구수종으로 추정되는 개쑥부쟁이는 직접파종에도 높은 활착율을 보였다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2012년 추계학술대회
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• pp.121-131
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• 2012

This study is an analysis about BOD, COD, SS, T-N, T-P of 4Stage-BNR, MLE + CS(Coagulating Sedimentation), Bio-SAC BNR method of construction for 3 largest sewage treatment plants among 12 sewage treatment plants in Incheon. The purpose of this study is improving the operational effectiveness for Incheon sewage treatment plant by introducing the optimized method for quality of the discharged water.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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• pp.367-370
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• 2005

The risk from genetically modified (GM) plants results from the possibility of gene contamination producing adverse effects on biological diversity by introducing herbicide or insect resistance into related plants or weeds (NAS 2002). The concern about the leakage of genes from GM plants into the environment has primarily focused on pollen that could be wind-borne for long distances. During the period of fisk assessment in Japan, physical containment is applied as a measure of reducing gene flow via the dispersal of pollen from GM plants into the surrounding environment In this study, we tried to estimate the effect of physically contained greenhouse covered by 1-mm fine mesh to reduce pollen dispersal by researching cross pollination rate between non-GM yellow maize in a greenhouse and silver maize outside the greenhouse.

• 기술사
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• 제10권1호
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• pp.10-14
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• 1977

In accordance with introducing extra high voltage system, system power plants have to be operated in underexcited condition, which causes temperature rise at the stator end portion of turbine generator. This Paper deals with (1) various elements affecting temperature rise and (2) methods of pre-estimating temperature rise.

• 한국환경복원기술학회지
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• 제8권3호
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• pp.1-12
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• 2005

A study on ecological restoration of landfill slope was conducted in Nanjido to compare immediate and long time effect and supply continuous back data for ecological restoration of landfill slope. As a result, all region constructed by SF and CODRA was effective on improving soil environment and preventing slope erosion. In case of former, by adapting flowers the initial scenery was beautifully built however there was tendency that as time passes the introduced plants were being overtaken by native plants thus it was necessary to select plants which are not being overtaken by native plants. In case of latter, by introducing leguminous plants the natural adaptation of plants were moving smoothly.

• Nuclear Engineering and Technology
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• 제53권4호
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• pp.1369-1377
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• 2021

Nowadays, it is necessary to accelerate the construction of new power plant in face of rising energy demand in such a way that the electricity will be generated at the lowest cost while reducing emissions caused by that generation. The expansion planning is one of the most important issues in electricity management. Nuclear energy comes forward with the low-carbon technology and increasing competitiveness to expand the share of generated energy by introducing Gen IV reactors. In this paper, the generation expansion planning of these new Gen reactors is investigated using the WASP software. Iran power grid is selected as a case of study. We present a comparison of the twenty-one year perspective on the future with the development of (1) traditional thermal power plants and Gen II reactors, (2) Gen III + reactors with traditional thermal power plants, (3) Gen IV reactors and traditional thermal power plants, (4) Gen III + reactors and the new generation of the thermal power plant, (5) the new generation of thermal power plants and the Gen IV reactors. The results show that the Gen IV reactors have the most developing among other types of power plants leading to reduce the operating costs and emissions. The obtained results show that the use of new Gen of combined cycle power plant and Gen IV reactors make the emissions and cost to be reduced to 16% and 72% of Gen II NPPs and traditional thermal power plants, respectively.

• 화훼연구
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• 제18권2호
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• pp.117-124
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• 2010

The purpose of this study was to create an artificial wetland in rooftop greening. We monitored species and changes of flora in wetland and rooftop greening. As shown the consideration and possibility of supplying the artificial wetland in rooftop greening through flora in wetland, this study tried to find methods to create a efficient flora space. This results are listed as belows. The species were applied to artificial wetland in rooftop greening and come up to 'General standard for selecting plants' among hydrophyte in wetlands. The plants of Potentilla kleiniana, Penthorum chinense, Scirpus radicans, Scirpus triqueter, Veronica undulata, Mentha arvensis var. piperascens, Salvia plebeian, Sagittaria aginashi, Aneilema keisak, Stachys riederi, Alisma canaliculatum, Eclipta prostrata, Sparganium stoloniferum turned out an appropriate species. This research was expected to create a various environment and component of species by introducing many types of plants in ecological wetland on rooftop greening.

• Rapid Communication in Photoscience
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• 제3권2호
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• pp.28-31
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• 2014

Loss of chlorophyll is the visible symptom of leaf senescence and staygreen refers to the delayed leaf senescence in plants. The staygreen gene (SGR) in rice (Oryza sativa L.) has been identified as its mutation maintains greenness during leaf senescence, and encodes a chloroplast protein required for the initiation of chlorophyll breakdown in plants. In this study, we isolated a rice SGR-homologous gene in creeping bentgrass (Agrostis stolonifera L.), and transgenic creeping bentgrass plants were obtained by introducing pCAMBIA3301 vector harboring antisense SGR gene under control of the senescence-specific SAG12 promoter. Transgenic plants were selected by herbicide resistance assays and genomic integration of the transgenes was confirmed by PCR analysis. Subsequent analyses demonstrated the staygreen phenotype of the transgenic creeping bentgrass plants with decreased chlorophyll loss during leaf senescence. These results suggest that the antisense SGR expression in creeping bentgrass delays leaf senescence, which provides a way to develop genetically engineered turfgrass varieties with the commercially useful staygreen trait.

• 한국초전도ㆍ저온공학회논문지
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• 제23권3호
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• pp.14-19
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• 2021

The reduction of carbon dioxide emissions becomes a global issue, the main source of carbon dioxide emissions in the Asian region is the energy conversion sector, especially coal-fired power plants. We are working to develop technologies that will at least limit the increase in carbon dioxide emissions from the thermal power plants as one way to reduce carbon dioxide emissions. Our research aims to reduce carbon dioxide emissions by removing iron oxide scale from the feedwater system of thermal power plants using a superconducting high-gradient magnetic separation (HGMS) system, thereby reducing the loss of power generation efficiency. In this paper, the background of thermal power plants in Asia is outlined, followed by a case study of the introduction of a chemical cleaning line at an actual thermal power plant in Japan, and the possibility of introducing it into the thermal power plants in China based on the results.