• Journal of Environmental Impact Assessment
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• v.26 no.1
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• pp.27-43
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• 2017

The objectives of the study were to evaluate fish compositions, endangered species, community structure, physical habitat, and general water quality for a preliminary environmental impact assessment of Jeokbyeok River on the road construction between two regions. Total number of species and total number of individuals, based on CPUE, were 23 and 1186, respectively. The endangered species (I, II) as the legal protection species were Pseudopungtungia nigra (79 samples) Gobiobotia brevibarba) (5) Gobiobotia macrocephala (2), indicating a requiring of endangered species conservation. In the meantime, exotic species and ecological disturbing species such as Micropterus salmoides and Lepomis macrochirus, were not present, indicating a well conserved area. According to fish community analysis, values of species diversity index were high (range: 0.788 - 1.030), and the dominance index were low (range: 0.097 - 0.183), indicating that the fish community in this area was maintained well without high dominacne by specific species. Also, fish analysis on tolerance guilds and trophic guilds showed that the proportions of sensitive species were largely exceeded the proportions of the tolerant species, while the proportions of insectivore species were largely exceeded the proportions of the omnivore species. This outcome suggests that the ecosystem was well maintained in terms of tolerance and trophic compositions (food chain). Ecological health, based on the multi-metric fish model of Fish Assessment Integrity (FAI), reflected those fish conditions. In other words, values of FAI model averaged 82.4, which means a "good condition" in the criteria of ecological health by the Minstry of Environment, Korea. In addition, general water quality and physical habitat analyses showed that the system was in good condition. Under these conditions, if the road constructions between the two regions happen in the future, inorganic suspended solids may increase in the waterbody, and this may result in indirect or direct influences on the physical habitats and food chain as well as fish compositions, so the ecological protections and prevention strategy from the soil erosion are required in the system.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.16-16
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• 2023

기후변화로 인한 가뭄, 홍수, 녹조 등 이상기후 현상들이 본격화함에 따라 안정적인 수자원 관리의 필요성이 증가하고 있다. 특히 급변하는 환경조건 속에서도 안정적인 수자원 확보를 가능하게 하는 지하수 자원의 적극적인 활용은 기후변화대응에 있어 핵심적인 요소이다. 지하수는 하천, 호수 연안지역 등 다양한 지표의 수문환경과 연결되어 천층지권의 수문생태적 특성을 결정하기 때문에, 지속가능한 수자원 활용을 위해서는 지하수와 지표수의 상호작용에 대한 통합적인 검토가 이루어져야 한다. 하지만 긴밀하게 연계된 특성에도 불구하고 지하수와 지표수에 대한 연구는 오랜기간 개별수문환경에 대해 독립적으로 수행되어왔다. 이러한 연구경향은 저류시간이 크게 다른 지하수와 지표수의 수문적 특성뿐 아니라 개별수문환경에서 나타나는 작용들을 통합적으로 다룰 수 있는 모델의 부제에도 기인한다. 최근 비약적인 연산능력의 향상과 함께 지하수-지표수 환경을 연계한 통합수문모델(Integrated Hydrology Model)의 개발 및 활용이 이루어짐에 따라 기후변화 및 수자원 활용에 따른 수문환경변화 대한 통합적인 연구 시도가 이루어지고 있다. 본 발표에서는 최근의 통합수문모델과 다중요소 반응성 운송 모형(Multicomponent Reactive Transport Model)의 연계를 통한 물질순환 연구의 최신 동향을 소개하고(농도-유량 상관관계, 지표수계의 화학적 풍화와 이산화탄소 저감, 녹조 등), 데이터 기반 모형을 통한 통합수문모델의 연산 효율 및 정확성 향상을 위한 방법에 대해 모색하고자 한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.17 no.2
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• pp.15-31
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• 2014

The purpose of this study is to assess the green environment on urban space and to suggest the sustainable green space planning. The study area is Dalseo-gu which has the biggest spatial imbalance of green space among 7 districts of Daegu. Three functions such as nature-ecological, environment-control, and usage function were established for assessing the green environment. For the assessment step of nature-ecological function, 'green connectivity' and 'animal movement' were used. Also,'thermal environment' and 'temperature decrease' were utilized in terms of environment-control function and 'green space's service supply' were utilized in terms of usage function. According to the results of integrated assessment, the green rich zone(Grade I) was 44.8% of total area in Dalseo and this zone was distributed along the southern forest of Mt. Ap and Mt. Biseul and the northern forest of Mt. Gung and Mt. Waryong. On the other hand, the green broken zone(Grade IV) was located in the residential areas of Gamsam and Jukjeon and the residential and industrial areas of Wolseong 1 and Jincheon and this zone was 5.5% of total area. The findings from this study can be used as the plan criteria for construction and distribution of green space in urban master plan.

• Journal of Korea Technology Innovation Society
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• v.17 no.1
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• pp.242-263
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• 2014

Establishment of efficient cooperative ecosystem of research institutes is important for the efficiency of national innovation system, especially in the era of technology convergence. Performance of institutes inside the ecosystem is dependent on the position of the institutes in the system. This study investigates the relationship between network structure and research performance, and determines significant factors on the research performance. The results of 5 year panel data analysis of SCI journal papers of Korean government research institutes indicate that four network centralities -degree, betweenness, closeness, and eigenvector- and structural holes have significant effect on the research performance of the institutes. Among the four centralities, closeness and eigenvectors are more significant than others. Implications of the results of this study for policy of establishing efficient cooperative system are that increasing the cooperative activities of less active institutes is more effective for research performance than increasing the magnitude of cooperative activities of all institutes. Also, when an institute starts a new cooperative relationship, it is better to have relationship with an active institute first.

• Korean Journal of Environmental Biology
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• v.40 no.4
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• pp.525-549
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• 2022

The process of biological invasion is led by the dynamics of a population as a demographic and evolutionary unit. Spatial structure can affect the population dynamics, and it is worth being considered in research on biological invasion which is always accompanied by dispersal. Metapopulation theory is a representative approach to spatially structured populations, which is chiefly applied in the field of ecology and evolutionary biology despite the controversy about its definition. In this study, metapopulation was considered as a spatially structured population that includes at least one subpopulation with significant extinction probability. The early phase of the invasion is suitable to be analyzed in aspects of the metapopulation concept because the introduced population usually has a high extinction probability, and their ecological·genetic traits determining the invasiveness can be affected by the metapopulation structure. Although it is important in the explanation of the prediction of the invasion probability, the metapopulation concept is rarely used in ecological research about biological invasion in Korea. It is expected that applying the metapopulation theory can supply a more detailed investigation of the invasion process at the population level, which is relatively inadequate in Korea. In this study, a framework dividing the invasive metapopulation into long- and middle-distance scales by the relative distance of movement to the natural dispersal range of species is proposed to easily analyze the effect of a metapopulation in real cases. Increased understanding of the mechanisms underlying invasions and improved prediction of future invasion risk are expected with the metapopulation concept and this framework.

• Electronics and Telecommunications Trends
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• v.31 no.4
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• pp.13-22
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• 2016

다수의 미디어와 기술 시장 보고서가 2016년을 가상현실(Virtual Reality: VR) 기술이 대중화되는 원년으로 전망하고 있다. 착용형 디스플레이는 컴퓨터로 시뮬레이션되는 가상의 콘텐츠 세계와 현실의 사용자를 연결하는 대표적인 VR 인터페이스 장치이다. 일정 수준 이상의 사용성을 제시하는 데에 필요한 기술의 진입 장벽이 낮아지면서 다양한 소비자 제품들의 시장 출시가 진행 중이고, 주요 업체들은 킬러 콘텐츠 발굴과 함께 새로운 산업 생태계 구축에 역량을 집중하고 있다. 선도적인 연구그룹들은 차세대 가상/증강현실(VR/AR) 인터페이스의 구현 목표를 가볍고 휴대성이 우수한 안경형 디스플레이에 두고 있으며, 모니터 및 키보드와 마우스를 벗어난 다양한 입출력 기술을 개발하고 있다. 본고에서는 VR 시장의 중심이 되고있는 완전몰입형 디스플레이(Head Mounted Display: HMD) 현황을 정리하고, 향후 AR 시장으로의 확대에 기반이되는 안경형 디스플레이(Eye Glasses-type Display: EGD) 기술의 연구개발 동향을 정리한다.

• Korean Journal of Ichthyology
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• v.28 no.1
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• pp.28-34
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• 2016

The anatomy and histology of the olfactory organ in Favonigobius gymnauchen was investigated using a stereo microscopy, light microscopy and scanning electron microscopy. The paired olfactory organs in the dorsal snout are set in between the upper lip and the eyes. These organs are composed of two openings (anterior nostril with a tubular structure and posterior nostril), a single olfactory cavity, two nasal sac (ethmoidal and lacrimal sacs), olfactory nerve and olfactory bulb. The distributional pattern of the sensory epithelium is a only one type (continuous type). This epithelium is made up of the receptor cell, supporting cell and basal cell. The receptor cell has a only one type (ciliated receptor cell with 3~4 cilia). The non-sensory epithelium is built of the stratified epithelial cells and has mucous openings on the surface. Such an olfactory organ in F. gymnauchen may be considered to reflect its ecological habitat as a shallow water or tidal pool in the coastal zone.

• Journal of Radiation Protection and Research
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• v.27 no.2
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• pp.111-120
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• 2002

A reference scenario of vault safety case prepared by the IAEA for the near-surface disposal facility of low-and informed]ate-level radioactive wastes is assessed with the MASCOT program. The appropriate conceptual models for the MASCOT implementation is developed. An assessment of groundwater pathway through a drinking well as a geosphere-biosphere interface is performed first. then biosphere pathway is analysed to estimate the radiological consequences of the disposed radionuclides based on compartment modeling approach. The validity of conceptual modeling for the reference scenario is investigated where possible comparing to the results generated by the other assessment. The result of this study shows that the typical conceptual model for groundwater pathway represented by the compartment model ran be satisfactorily used for safety assessment of the entire disposal system in a cons]stent way. It is also shown that safety assessment of a disposal facility considering complex and various pathways would be possible by the MASCOT program.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.444-457
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• 2014

Dangsan forests are traditional village forests which have been established by local residents. They represent unique cultural landscape of Korea with a history of more than several hundred years. It is necessary for a cultural contents to have locality and globality so as to represent Korea. Cultural heritage can retain their value when they are fully sustained their authenticity and management scheme. Although many Dangsan forests have been on the verge of disappearance, the four villages in Sinwon-ri have retained Dangsan forests with Dangsan ritual. In this study, a designation of 'Conservation area of agricultural landscape ecology' including Dangsan forests, Bibo forests, rice paddy field, and stream in Sinwon-ri was suggested. This 'Conservation area of agricultural landscape ecology' can be developed to unique glocal cultural content of rural Korea, and will contribute to enhance the value of the Dangsan forest's, and revitalization of rural villages.

• Ecology and Resilient Infrastructure
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• v.7 no.4
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• pp.374-387
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• 2020

This study was conducted to provide basic data for monitoring the trend of ecosystem change and establishing management plans for wetland protection areas by understanding the status of naturalized plants. In 21 wetland protection areas, 129 taxa, including 10 invasive alien species, were recorded. The naturalized plants appeared mostly as 71 taxa in the Chimsil wetland and were not observed in the Moojechineup and Sumeunmulbaengdui wetlands. Among the naturalized plants, 42 taxa (32.6%) originated from North America. Annual and biennial plants accounted for 68.2% (88 taxa). The frequencies of occurrence of naturalized plants growing in dry secondary grasses such as Erigeron annuus and Trifolium repens were high, and clonal plants that propagated by making stolons and struck roots accounted for 19.4% (25 taxa). The naturalized and urbanization indices showed positive correlations with location factors such as wetland, agricultural land, and used area. However, a negative correlation was found between altitude and forest. Therefore, a management plan that synthetically considers the occurrence frequency and growth characteristics of naturalized plants as well as the locational characteristics of wetland protection areas is required.