• Korean Journal of Medicinal Crop Science
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• v.19 no.1
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• pp.24-30
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• 2011

This text was analyzed and investigated the vegetation and floristic composition by cluster analysis and classification of phytosociological method, to evaluate the species composition, habitat environment and community structure of Liriope platyphylla and Liriope spicata group in Korea. The southeast slope gradient of the habitat of L. platyphylla and L. spicata was 6.7 to 8.4%, and the habitat altitude of L. platyphylla (41.0 m), L. spicata (114.9 m) was different. Habitat distribution of L. spicata was broader than L. platyphylla. Appearing plants of L. platyphylla and L. spicata group was 58 taxa, 99 taxa, respectively, and Coverage of tree layer was 87.5%, 92.5% respectively. In genus Liriope group, the highest appearing frequency of plant grow in the moist valley as Quercus serrata. Thus, plants of genus Liriope growth was better in moist shade. The vegetation of L. platyphylla group was classified into Quercus serrata community, Castanopsis sieboldii community, Pinus densiflora community and Pinus thunbergii community, and the Liriope spicata group was classified into Quercus serrata community, Quercus alien community, Quercus acutissima community, Prunus verecunda community, Robinia pseudoacacia community, Pinus densiflora community and Pinus thunbergii community. In genus Liriope group, Quercus serrata and Pinus densiflora communities was the closest the similarities.

• Korean Journal of Computational Design and Engineering
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• v.18 no.2
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• pp.120-128
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• 2013

Recently, the importance of the HVAC system (Heating, Ventilating and Air Conditioning System) is growing because comfortable working environment has emerged as important element for enhancing work efficiency. HVAC system is a general term of a system that collectively creates desired temperature and state through heating and air conditioning. HVAC system consists of many objects, so it requires a lot of constraints for its effective operation. Thus, specific strategy is needed for an optimal operation of HVAC System for plant. In this paper, manufacturing plants which have HVAC systems has been modeled and the objective function and constraints for an effective operation have been defined. And new strategy for an effective operation of HVAC system with energy simulations has been proposed.

• Asian Journal of Atmospheric Environment
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• v.10 no.3
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• pp.137-145
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• 2016

In this study, the contents of dust and associated heavy metals on roadside plants were investigated to assess their foliar transfer. The study was conducted at six different locations (four roadside and two industrial) near an industrial area in Bilaspur (Chhattisgarh), India. Six metals (Fe, Mn, Pb, Cu, Cr, and Cd) were examined in this study. The concentrations of heavy metals in foliar dust were found to be in the order of Fe>Mn>Pb>Cu>Cr>Cd. However, this relative order changed in the case of leaf concentrations to Fe>Mn>Cd>Cu>Pb>Cr. The metal concentrations in the dust and leaves can be attributed mainly to industrial and vehicular emissions. In contrast to other metals, Cd showed significant accumulation in the leaves compared to the respective dust samples. This study showed different patterns in the distributions of heavy metals between the dust deposited on the leaves and the metal accumulated in the leaves. These results suggest that the dust retention and heavy metal accumulation in native plant species should be explored in an attempt to manage these hazardous metallic elements.

• Journal of the Ergonomics Society of Korea
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• v.33 no.1
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• pp.1-14
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• 2014

Objective: The purpose of this study is to select the methodology for SMR HRA which has characteristics that are different from existing nuclear power plants and digital-based plants. Background: We must assure safety to preoccupy export of technology to developing countries or countries interested in nuclear application. And we can be an advanced country in nuclear technology by securing original technology in the field of SMR such as SMART. Method: THERP, which is the most representative HRA methodology among all, and RARA, which is the latest HRA methodology. This study compared and evaluated THERP and RARA. Results: As a result of applying THERP and RARA methodologies which are based on LOCA EOG task analysis result, this research concluded that RARA has higher personal errors than THERP. Conclusion: This study needs validation for LOCA, emergency operations, normal and abnormal scenarios since HRA methodology was only focused on LOCA scenario. Application: The results of this study can apply as base line data when designing MMIS, which is the main control room of SMART, and when building a simulator.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.4
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• pp.71-79
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• 2011

This paper proposes a reliability enhancement of industrial real-time Ethernet using master redundancy method for NPPs(Nuclear Power Plants). In this paper, Ethernet Powerlink is investigated for distributed control systems for NPPs considering real-time and reliability performance. The proposed method can reduce a master switch-over time using PReq signal when Ethernet Powerlink master(Managing Node) failure was occurred. Using the OPNET simulation results, the performance enhancement of master switch-over time of Ethernet Powerlink is verified for NPPs.

• 대한예방의학회:학술대회논문집
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• 1995.10a
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• pp.261-262
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• 1995

• Korean Journal of Environment and Ecology
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• v.27 no.2
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• pp.170-195
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• 2013

This study was carried out to investigate the vascular flora of Mt. Nam, Mt. Toham, and Mt. Danseok in Gyeongju National Park. The vascular plants were surveyed for 7 times from July 2011 to May 2012. The results were summarized as 436 taxa, 96families, 284 genera, 385 species, 4 subspecies, 41 varieties, and 6 forms. The 13 taxa were categorized as Korean endemic plants species and the other 7 taxa as rare plants species, which categorized by the Korea Forest Service. Based on the Floristic Degrees categorized by the Specific Distribution of Plants Species, one taxa grouped as the Floristic Degree V, 3 for Floristic Degree IV, and 9 for Floristic Degree III, 4 for Floristic Degree II, and 24 taxa for Floristic Degree I. The naturalized plants were recorded as 29 taxa, and their Naturalization Ratio and Urbanization Index were recorded as 6.65%, and 9.03%, respectively. 436 taxa listed consists of 182 taxa(41.7%) of pasturing plant, 176 taxa(40.4%) of edible plants, 147 taxa(33.7%) of medicinal plants, 52 taxa(11.9%) of ornamental plants, 18 taxa(4.1%) of timber plants, 16 taxa(3.7%) of stain plants, 8 taxa(1.8%) of fiber plants, 1 taxa(0.2%) of industrial plants and 79 taxa(18.1%) of unknown plants.

• Korean Journal of Plant Resources
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• v.30 no.2
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• pp.219-239
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• 2017

This study was carried out to investigate the vascular plants of the protected area for forest genetic resource conservation in the National Yonghyeon natural recreation forest. The vascular plants collected 7 times (from February to September 2014) were consist of total 460 taxa; 95 families, 280 genera, 398 species, 3 subspecies, 50 varieties and 9 forms respectively. The 6 taxa of Korean endemic plants and 8 taxa of Korean rare plants were investigated. The floristic regional indicator plants found in this area were 43 taxa comprising 7 taxa of grade IV, 7 taxa of grade III, 12 taxa of grade II, 17 taxa of grade I. The naturalized plants were 39 taxa, therefore naturalized ratio was 8.5%. 460 taxa listed consist of 189 taxa (41.1%) of edible plants, 155 taxa (33.7%)of medicinal plants, 177 taxa (38.5%) of pasture plants, 52 taxa (11.3%) of ornamental plants, 17 taxa (3.7%)of timber plants, 12 taxa (2.6%) of fiber plants and 3 taxa (0.7%) of industrial plants. The vegetation status of investigated area was comparatively well conserved, but human-induced damage is increasingly greater. Therefore, a long-term monitoring of vascular plants and vegetation movement must become accomplished.

• Korean Journal of Plant Resources
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• v.24 no.5
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• pp.521-539
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• 2011

This study was carried out to investigate the flora of Mt. Gahyeon (Gyeonggi-do, Gimpo). The vascular plant were collected 13 times (from March to Oct. 2010), and 413 taxa in total were identified, including 96 families, 267 genera, 362 species, 6 subspecies, 40 varieties and 5 forms. Among them were 6 taxa of Korean endemic plants and 17 taxa of specially designated plants by the Ministry of Environment. Usage of 413 taxa were consists of 159 taxa (38.5%) of edible plants, 122 taxa (29.5%) of medicinal plants, 77 taxa (18.6%) of pasture plants, 47 taxa (11.4%) of ornamental plants, 26 taxa (6.3%) of stainable plants, 14 taxa (3.4%) of timber plants, 6 taxa (1.5%) of fiber plants, 5 taxa (1.2%) of industrial plants and 102 taxa (24.7%) of unknown resource plants, respectively. The naturalized plants were identified as 41 taxa and the percent of naturalized index (NI) was 9.9% of total 413 taxa vascular plants. Furthermore, therophytes (27.1%), hemicryptophytes (26.4%), geophytes (14.7%) showed high proportional ratio in life form spectrum.

• Korean Journal of Plant Resources
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• v.29 no.2
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• pp.264-280
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• 2016

This survey was conducted in order to investigate the vascular plants of Mt. Goryeong and Gaemyeong in the DMZ area of Korea. The vascular plants were collected eight times from April 2014 to October 2014 and consisted a total of 450 taxa; 91 families, 279 genera, 391 species, 4 subspecies, 49 varieties and 6 forms. The observed rare plant species as designated by Korea Forest Service were 5 taxa including Tylophora floribunda Miq., Aristolochia contorta Bunge, Viola albida Palib., etc. Endemic plant species were 6 taxa containing Aconitum pseudolaeve Nakai, Clematis brachyura Maxim., Clematis trichotoma Nakai, etc. 33 taxa were listed as specific plant species based on phytogeographical in the investigated area. 35 taxa were recorded as naturalized plants, and their naturalized rate and urban index were noted as 7.7%, and 10.9%, respectively. Of the 450 taxa listed; 186 were edible plants, 173 pasture plants, 149 medicinal plants, 51 omamental plants, 20 timber plants, 13 stain plants, 4 fiber plants, 4 industrial plants and 92 unknown resource plants.