• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.5
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• pp.49-57
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• 2013

This study was carried out to analysis change of distribution and habitat location environment of Korean Fir which is typically vulnerable species by the climate change in Mt. Jiri and Halla. Korean Fir was decreased 18% during 27 year since year 1981, Mt. Halla was 34% during 15 years since year 1988. In the same periods, Temperature change was increased from 8.56 to $9.36^{\circ}C$, from 11.2 to $12.1^{\circ}C$. Distribution changes by the elevation showed higher change ratio 1,400~1,600m in Mt. Jiri and 1,200~1,900m in Mt. Halla. Changes of Korean Fir each slope aspects was high $180{\sim}360^{\circ}$ in Mt. Jiri, $45^{\circ}$ in Mt. Halla. In slope was $30^{\circ}$ in Mt. Jiri and $20^{\circ}$ in Mt. Halla. Changes by reliefs was 12 in Mt. Jiri, 0 or 15 in Mt. Halla, and Sites of Korean Fir was convex slopes both of two areas. Changes by soils was in the good drainage textures.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.5
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• pp.27-38
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• 2013

This study was conducted to analyze the correlation between vegetation, environmental factors, and soil characteristic of an endangered species, Eleutherococcus senticosus. Eighteen quadrats in population zones of Seoraksan, Odaesan, Chiaksna, Duckhangsan, Sobaeksan, Juwangsan, and, Jirisan were set up and ordination was analyzed. In the study sites, soil pH, available phosphorous, organic matter and nitrogen were ranged from 5.06~5.43, 24.63~57.77mg/kg, 14.01~18.37%, and 0.63~0.75%, respectively. Eleutherococcus senticosus is classified into Morus bombycis dominant population, Cornus controversa dominant population, and Eleutherococcus senticosus typical population. The importance value of Acer pictum subsp. mono, Morus bombycis, Magnolia sieboldii, Cornus controversa, Tilia taquetii, and Ulmus laciniata in Eleutherococcus senticosus population were 23.76%, 23.61%, 18.06%, 17.82, 15.31%, and 13.57%, respectively. The correlation between vegetation and environmental factors of Eleutherococcus senticosus vegetation distribution were shown to be affected by altitude, slope, and direction.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.19 no.3
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• pp.59-69
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• 2016

This study was conducted to develope an evaluation system for sustainable conservation of old trees with historic and traditional values in rural areas. Existing evaluation system was modified through field application of 10 old trees and expert research twice for development of new evaluation system. 4 evaluation items in 10 evaluation items were deleted by first expert research. Some items are proposed to offer a figure explanation by second expert research. End-developed evaluation items are consisted of 6 items ((1) Ground State, (2) Blight, Harmful Insects, (3) Tree Form, (4) Canopy Vitality, (5) Bark, (6) Damage) reflecting the order of importance evaluation. Old trees evaluation system developed in this study is expected to be utilized continuously to conserve the old trees in the rural areas and gradually help to increases the historic and traditional values.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.14 no.2
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• pp.59-81
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• 2011

The flora of the Sinpyeong and Churyeong stream were listed 324 taxa; 87 families, 227 genera, 289 species, 1 subspecies, 31 varieties and 3 forms. The Sinpyeong stream were 249 taxa and Churyeong stream were 221 taxa. Based on the rare plants (IUCN) by the Korea Forest Service and Korea National Arboretum were recorded; Penthorum chinense (Crassulaceae), etc. and endemic plants, 6 taxa; Weigela subsessilis (Caprifoliaceae), Lycoris flavescens (Amarylidaceae), etc. Based on the specific plants by floral region were total 12 taxa (3.7% of all 324 taxa of flora); Monochoria korsakowi (Pontederiaceae), etc. in class III. 10 taxa (Salix glandulosa (Salicaceae), Ulmus parvifolia (Ulmaceae), Impatiens noli-tangere (Balsaminaceae), Grewia biloba var. parviflora (Tiliaceae), Nymphoides peltata (Gentianaceae), Actinostemma lobatum (Cucurbitaceae), Cirsium pendulum (Compositae), Microstegium japonicum (Gramineae), etc.) in class I. Based on the naturalized plants, 51 taxa and ecosystem disturbing wild plants, 6 taxa (Rumex acetosella, Sicyos angulatus, Aster pilosus, Ambrosia artemisiaefolia, Hypochaeris radicata, Paspalum distichum var. distichum) and naturalization rate was 15.7% of all 324 taxa of flora, urbanization index was 18.8% of all 271 taxa of naturalized plants. Based on the hydrophytes, 23 taxa and emergent hydrophytes were 17 taxa, floating-leaved hydrophytes were 3 taxa, submergent hydrophytes were 2 taxa, free-floating hydrophytes was Spirodela polyrhiza.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.13 no.5
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• pp.12-27
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• 2010

The purpose of this study is carried out to present the raw data for restoring and maintaining an urban stream by objective surveying and analysing about flora in Changwon stream and Nam stream, Changwon-si, Gyeongsangnam-do, Korea. The results are as follows. The numbers of vascular plants were summarized as 248 taxa; 71 families, 184 genera, 220 species, 26 varieties and 2 forma. The numbers of vascular plants by streams were 202 taxa in Changwon stream and 206 taxa in Nam stream. The endemic plant was Salix pseudolasiogyne. The rare plants designated by Korea Foret Service were 2 taxa; Aristolochia contorta and Koelreuteria paniculata. The specific plants by floristic region were 12 taxa; Aphananthe aspera, Artemisia selengensis, Indigofera pseudotinctoria and so forth. The naturalized plants were 37 taxa; Ailanthus altissima, Amaranthus patulus, Amorpha fruticosa and so forth. The invasive alien plants designated by Ministry of Environment were 4 taxa; Ambrosia artemisiifolia var. elatior, Aster pilosus, Rumex acetocella and Solanum carolinense. The UI (Urbanized Index) and NI (Naturalized Index) were 13.6% and 18.3% in Changwon stream and 13.6% and 17.9% in Nam stream.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.23 no.1
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• pp.37-48
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• 2020

This study was aimed to design core areas applied by the global conservation criteria to promote the public awareness to the protected areas and the value cognition of the Key Biodiversity Areas (KBAs), targeting the Mt Seorak, according to the designation of globally important biodiversity areas. As a method for carrying out this study, the biota were cataloged through literature reviews and field trips. With applied by the Global Red List criteria of the International Union for Conservation of Nature (IUCN), only nine species were categorized in the studied area; plants were classified into six species as follows: Megaleranthis saniculifolia ohwi, Bupleurum euphorbioides Nakai, Hanabusaya asiatica Nakai, Thuja koraiensis Nakai, Leontopodium leiolepis Nakai, Androsace cortusaefolia Nakai, fish was classified one species as follow: Pungitius sinensis Tanaka, and the mammal was classified as two species as follows: Hydropotes inermis, Naemorhedus caudatus. According to the occupation area (EoO, Extent of Occurrence) and Minimum Viable Population(MVP), the size of protected area was 234.56㎢ for plants, 235.07㎢ for mammals, and 0.14㎢ for fish, and the Key Biodiversity Area (KBA) of Mt. Seolak suggested as 286.72㎢.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.26 no.1
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• pp.35-46
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• 2023

The purpose of this research is to provide characteristics and satisfaction of visitors for Deoksan Provincial Park in Chungcheongnam-do. This study conducted face-to-face interview during Oct. to Nov. in 2022. Total sample size of this study was 521. This study used to implement frequency analysis, cross analysis and logit analysis via SPSS 21.0 version. The results showed most of visitors were one day visitors and visited with family and relatives. Many visitors visited the Deoksan Provincial Park to climb the mountain and relaxing/healing with the nature. The satisfaction level of factors such as nature, facility, access to information of the park was high with about more than 4-point on Likert scale. This study would be useful to develop site-specific policies to the management of provincial parks as this study identified the characteristics and satisfaction level of the visitors.

• Journal of Electrical Engineering and Technology
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• v.11 no.6
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• pp.1535-1547
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• 2016

This paper proposes various design procedures for computing Power System Ancillary Service Requirement Assessment Indices (PSASRAI) for a Two-Area Thermal Reheat Interconnected Power System (TATRIPS) in a restructured environment. In an interconnected power system, a sudden load perturbation in any area causes the deviation of frequencies of all the areas and also in the tie-line powers. This has to be corrected to ensure the generation and distribution of electric power companies to ensure good quality. A simple Proportional and Integral (PI) controllers have wide usages in controlling the Load Frequency Control (LFC) problems. So the design of the PI controller gains for the restructured power system are obtained using Bacterial Foraging Optimization (BFO) algorithm. From the simulation results, the PSASRAI are calculated based on the settling time and peak over shoot concept of control input deviations of each area for different possible transactions. These Indices are useful for system operator to prepare the power system restoration plans. Moreover, the LFC loop coordinated with Redox Flow Batteries (RFB) has greatly improved the dynamic response and it reduces the control input requirements and to ensure improved PSASRAI, thereby improving the system reliability.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.11
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• pp.21-26
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• 2005

We propose a fully converged Ethernet and TDM transport system. Developed Ethernet and TDM convergence system can support not only L2 VPN service and premium multimedia service based on MPLS protocol but also TDM leased line service, simultaneously. Developed convergence system can provide high reliability for Ethernet packet due to support protection and restoration function of circuit based networks. Evaluation for Ethernet and TDM path was successfully performed to show the typical application of the proposed system in the legacy networks.

• Journal of Korea Multimedia Society
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• v.18 no.12
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• pp.1492-1500
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• 2015

In recent crime scene, there is the captured crime scene video at least one. So video files recorded on storage media often provide important evidence. Criminals often attempt to destroy storage saved crime scene video. For this reason recovery of a damaged or deleted video file is important to resolve criminal cases in aspects of digital forensic. In the recent, there is a study to recover video file based on video frames, but it is very poor time efficiency when the connecting video frames. This paper proposed advanced frame-based recovery technique of a damaged video files using time information. We suggest a new connecting algorithm to connect video frames using recorded time information in front of video frame. We also evaluate performance in aspects of time and experiment result shows that proposed method improves performance.