• 한국압력기기공학회 논문집
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• 제19권1호
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• pp.6-10
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• 2023

Only about 10% of selected equipment in nuclear power plants are monitored by wiring to address failures or problems caused by vibration. The purpose is primarily for preventive maintenance, not for predictive maintenance. This paper shows that vibration monitoring and diagnosis using Industrial 4.0 enables the complete predictive maintenance for all vibrating equipments in nuclear power plants with the convergence of internet of things; wireless technology, big data through periodic collection and artificial intelligence. Predictive maintenance using wireless technology is possible in all areas of nuclear power plants and in all systems, but it should satisfy regulatory guides on electromagnetic interference and cyber security.

• 한국자원식물학회지
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• 제28권5호
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• pp.616-634
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• 2015

연구는 경북 봉화군 명호면과 재산면, 안동시 도산면과 예안면에 걸쳐 위치하는 청량산(870 m)에 자생하는 관속식물을 밝히고 주요 자원식물들의 분포를 파악하였다. 2006년 3월부터 2014년 10월까지 총 16회에 걸쳐 조사된 식물은 총 97과 330속 541종 3아종 61변종 9품종 614분류군으로 확인되었다. 이 중 한국특산식물은 21분류군, 산림청 지정 희귀식물 중 취약종은 8분류군, 약관심종은 5분류군, 환경부 지정 식물구계학적 특정식물 중 V등급이 2분류군, IV등급이 10분류군, III등급이 18분류군으로 확인되었다. 또한 청량산에 분포하는 분포특이종으로 세뿔투구꽃, 산토끼꽃 등 4종이 조사되었다. 이들은 유용성에 따라 구분하면 식용 234종류, 사료용 213종류, 약용 174종류, 관상용 62종류, 목재용 16종류, 염료용 12종류, 섬유용 11종류의 순으로 나타났고, 이 외에 용도를 알 수 없는 식물이 167종(27.2%)로 확인되었다. 귀화식물은 32분류군으로 귀화율은 5.3%, 도시화지수는 10.0%로 나타났다.

• 한국자원식물학회지
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• 제35권2호
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• pp.289-316
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• 2022

본 연구는 경상북도 봉화군에 위치하는 선달산(1,236 m)에 분포하는 관속식물을 밝히고 그들의 유용성을 파악하기 위하여 실시되었다. 2014년 4월부터 2020년 10월까지 총 20회에 걸쳐 조사된 식물은 확증표본을 기초로 할 때 총 96과 341속 562종 18아종 53변종 5품종 638분류군으로 확인되었다. 이 중 특산식물은 20분류군, 산림청 지정 희귀식물 중 멸종위기종 1분류군, 취약종 3분류군, 약관심종 9분류군, 식물구계학적 특정 식물 중 V등급이 1분류군, IV등급이 11분류군, III등급이 28분류군으로 확인되었다. 분류군의 유용성에 따른 구분에 의하면 식용 440종류, 약용 505종류, 향료용 19종류, 산업용 234종류, 관상용 335종류, 생태복원용 214종류, 사료/퇴비용 269종류로 나타났고, 이 외에 용도를 알 수 없는 식물이 30종류로 확인되었으며, 귀화식물은 30분류군으로 파악되었다.

• 한국건설관리학회논문집
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• 제9권1호
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• pp.134-142
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• 2008

해외 플랜트 건설시장은 지속적으로 증가하고 있으며, 국내 건설업체의 중동 플랜트 건설시장의 비중도 점점 증가하고 있다. 하지만 해외 플랜트 건설사업은 상대적으로 높은 리스크를 가지고 있으므로 해외 플랜트 건설과 관련된 리스크를 사전에 예측, 평가하여 관리하는 것이 중요하다. 따라서 본 연구에서는 기존의 해외 공사 리스크 평가 방법과 현재 해외 플랜트 공사에 참여하고 있는 전문가들의 면담조사를 토대로 해외 플랜트 건설공사의 사업 수행 과정에서 발생할 수 있는 리스크를 입찰 및 계약 단계에서 사전에 평가할 수 있는 리스크 평가 방안을 제시하였다. 또한 중동지역의 실제 프로젝트 리스크 평가 사례를 통해서 해외 플랜트 프로젝트 리스크 평가에 대한 활용성을 검토하였다.

• 한국농공학회논문집
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• 제52권4호
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• pp.63-71
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• 2010

This study was performed to evaluate the planting properties and root potential of planting block with mixing seeding of herbaceous plants and cool-season grasses in CSG blocks manufactured by cemented sand and materials (CSG) in order to develop environmentally friendly CSG block applied revegetation. Five types of CSG mix designs with cement contents were determined, and the mechanical properties of CSG materials were studied experimentally. To analyze growth properties of plants within CSG block, germination ratio, visual cover, plant height and root potential were measured in four weeks and eight weeks after seeding. The germination regardless mixture seeding of plants and CSG mixproportions started within 4 ~ 7 days after seeding and the germination ratio were in the range of 60 ~ 65 %. The visual cover of kinds of plants evaluated by visual rating system were in the range of 6 ~ 8 in case of seeding the species of cool-season grasses and were in the range of 4 ~ 6 in case of seeding the species of herbaceous plants in four weeks after seeding. The root potential of CSG block with the species of cool-season grasses and herbaceous plants were in the range of $5.7{\times}10^{-3}{\sim}7.7{\times}10^{-3}$ MPa and $2.3{\times}10^{-3}{\sim}6.7{\times}10^{-3}$ MPa in eight weeks after seeding, respectively.

• The Plant Pathology Journal
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• 제35권6호
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• pp.609-622
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• 2019

Sound vibration (SV) treatment can trigger various molecular and physiological changes in plants. Previously, we showed that pre-exposure of Arabidopsis plants to SV boosts its defense response against Botrytis cinerea fungus. The present study was aimed to investigate the changes in the proteome states in the SV-treated Arabidopsis during disease progression. Proteomics analysis identified several upregulated proteins in the SV-infected plants (i.e., SV-treated plants carrying Botrytis infection). These upregulated proteins are involved in a plethora of biological functions, e.g., primary metabolism (i.e., glycolysis, tricarboxylic acid cycle, ATP synthesis, cysteine metabolism, and photosynthesis), redox homeostasis, and defense response. Additionally, our enzyme assays confirmed the enhanced activity of antioxidant enzymes in the SV-infected plants compared to control plants. Broadly, our results suggest that SV pre-treatment evokes a more efficient defense response in the SV-infected plants by modulating the primary metabolism and reactive oxygen species scavenging activity.

• The Plant Pathology Journal
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• 제28권1호
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• pp.101-106
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• 2012

Trifloxystrobin is a strobilurin fungicide, which possesses broad spectrum control against fungal plant diseases. We demonstrated that pre-treating red pepper plants with trifloxystrobin resulted in increased plant growth and leaf chlorophyll content compared with those in control plants. Relative water content of the leaves and the survival rate of intact plants indicated that plants acquired systemic tolerance to drought stress following trifloxystrobin pre-treatment. The recovery rate by rehydration in the drought treated plant was better in those pre-treated with trifloxystrobin than that in water treated plants. Induced drought tolerance activity by trifloxystrobin was sustained for 25 days after initial application. The trifloxystrobin treated red pepper plants also had induced systemic tolerance to other abiotic stresses, such as frost, cold, and high temperature stresses. These findings suggest that applying the chemical fungicide trifloxystrobin induced systemic tolerance to certain abiotic stresses in red pepper plants.

• Journal of Plant Biotechnology
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• 제6권3호
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• pp.145-150
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• 2004

Cabbage plants were transformed with the potato proteinase inhibitor II (PINII) gene, bar gene, and hpt gene using Agrobacterium. The expression of the PINII gene was driven by its own promoter which was wound-inducible. Ten transgenic plants were obtained from medium containing hygromycin as a selection antibiotic. The integration and expression of PINII and bar genes were confirmed by Southern and Northern hybridization. Growth and development of diamondback moths (Plutella xylostella) and tobacco cutworm (Spodoptera litura) larvae were examined on $T_1$ plants. The weight of the larvae and pupae of these two insects grown on transgenic plants was not different compared to those grown on wild type plants. However, the pupation and emergence rate of diamondback moths and tobacco cutworms fed on some transgenic plants was lower than on wild type plants. These results suggest that the PINII transgene under the control of a wound-induced promoter may be used for control of insects in transgenic cabbage through reduction of insect progeny number.

• 한국환경복원기술학회지
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• 제8권1호
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• pp.10-16
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• 2005

This experiment was conducted to study on application of several Korean native plants by seed spray methods for cut slope revegetation, and possibility of replacement almost imported tall fescue seeds by native herbaceous plants. So, we investigated growth and covering rate after sowing native plants seeds at the artificial slope plots in Suwon and the rock exposed cut-slopes in Wonju city. Emergence rate after seed spray at artificial slopes were higher Elsholtzia splendens and Dianthus superbus var. longicalycinus, showing the highest in E. splendens. Also, E. splendens, D. superbus var. longicalycinus, and Agrostemma coronaria were possible to use for seed spray at the rock exposed cut-slopes. The plots of mixed native plants show more seasonal scenery than that of tall fescue. Soil surface run-off by Typhoon was less in plot sown native plants than those of lawn grass, resulting fresh weight of roots was heavier. Thus, we found that the mixed seed spray of several native herbaceous plants, E. splendens, D. superbus var. longicalycinus, and Agrostemma coronaria, were well covered the slopes as tall fescue.

• 한국환경복원기술학회지
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• 제21권1호
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• pp.41-54
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• 2018

The purpose of this study was to present the fundamental data for conservation and management of wetland ecosystem by surveying and analysing the vascular plants distributed in major wetlands, Gyeongju National Park. The study sites were Tohamsan wetland, Amgok wetland and Namsan wetland. The numbers of vascular plants were summarized as 200 taxa including 70 families, 145 genera, 171 species, 2 subspecies, 23 varieties and 4 forms. The threatened species designated by Ministry of Environment was Utricularia yakusimensis, and the rare plants were 7 taxa including Utricularia yakusimensis, Drosera rotundifolia, Mosla japonica, Utricularia bifida, Pogonia japonica, Utricularia racemosa and Iris ensata var. spontanea. The Korean endemic plants were Lespedeza maritima and Weigela subsessilis. The specific plants by floristic region were 12 taxa including 3 taxa of grade V, 1 taxa of grade IV, 1 taxa of grade III, 2 taxa of grade II and 5 taxa of grade I. The plants with approval for delivering oversea were 9 taxa including Glycine soja, Saussurea pulchella, Habenaria linearifolia and so forth. The naturalized platns were 5 taxa including Rumex obtusifolius, Ambrosia artemisiifolia, Bidens frondosa, Erigeron annuus and Erigeron strigosus, the invasive alien plant was Ambrosia artemisiifolia.