• Ecology and Resilient Infrastructure
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• 제4권2호
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• pp.75-82
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• 2017

본서식지의 면적이 계곡산개구리 (Rana huarenensis)에게 미치는 영향을 알아보기 위하여 서울시 노원구 상계동에 위치한 수락산 일대 계곡에서 연구를 실시하였다. 조사지역은 계곡을 계곡산개구리 서식지의 면적의 크기에 따라 가장 좁은 면적의 S1($3.91m^2$), 중간 면적의 S2($4.42m^2$), 가장 넓은 면적의 S3($38.37m^2$), 3곳으로 나눈 후 각 조사지역에서 3월부터 6월까지 주 2회 15개체의 계곡산개구리 유생을 무작위로 포획하여 개체의 길이를 측정하였으며, 계곡의 습도, 기온, 수온을 측정하였다. 부화율은 S2지점에서 세 개의 난괴를 채집하여 측정하였다. 실험구별 서식지의 면적을 측정한 결과, 실험기간 중 강우량이 적었기 때문에 모든 실험구의 서식지 면적이 감소하였으며, S2지점은 눈에 띄게 줄어 들지 않았으나, S1은 원래 서식지의 4분의 1이 줄어들었으며 S3지점은 2분의 1이 감소하였다. 실험구별 평균대기습도와, 실험구별 평균기온, 실험구별 평균수온은 F-test결과 통계적으로 유의한 차이가 없었다. 부화율을 분석한 결과, 평균 부화율은 $76.84{\pm}18.23%$으로 확인되었다. 실험구별 유생 개체의 길이를 측정 한 결과, 통계적으로 차이가 있었으며, 서식지의 면적이 넓어짐에 따라 개체의 길이가 증가하였다 (F-test p< 0.05). 발생기간을 측정한 결과, 서식지의 면적이 넓을수록 개체의 발생속도가 빨라짐을 확인하였다. 실험구별 아성체 개체의 평균 길이를 분석한 결과, 통계적으로 차이가 있었으며, 개체의 길이는 S1, S3, S2순서로 증가하였다. 서식지 면적 변화가 없었던 S2의 개체의 크기가 가장 큰 것으로 보아 본 연구를 통해 계곡산개구리의 서식지 면적의 민감성을 알 수 있었다 (F-test p<0.05). 추후 본 연구의 결과를 바탕으로 고도의 차이가 계곡산개구리의 생장에 미치는 영향에 대한 실험을 진행한다면 계곡산개구리 개체군의 서식환경을 이해하는데 큰 도움을 줄 것으로 기대된다.

• Journal of Ecology and Environment
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• 제41권3호
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• pp.85-92
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• 2017

Unmanned aerial vehicles (UAVs) are a new and yet constantly developing part of forest inventory studies and vegetation-monitoring fields. Covering large areas, their extensive usage has saved time and money for researchers and conservationists to survey vegetation for various data analyses. Post-processing imaging software has improved the effectiveness of UAVs further by providing 3D models for accurate visualization of the data. We focus on determining the coniferous tree coverage to show the current advantages and disadvantages of the orthorectified 2D and 3D models obtained from the image photogrammetry software, Pix4Dmapper Pro-Non-Commercial. We also examine the methodology used for mapping the study site, additionally investigating the spread of coniferous trees. The collected images were transformed into 2D black and white binary pixel images to calculate the coverage area of coniferous trees in the study site using MATLAB. The research was able to conclude that the 3D model was effective in perceiving the tree composition in the designated site, while the orthorectified 2D map is appropriate for the clear differentiation of coniferous and deciduous trees. In its conclusion, the paper will also be able to show how UAVs could be improved for future usability.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권1호
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• pp.39-47
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• 2005

The purpose of this study is to review the prognosis of the TG Osseotite implant(3i Co, USA) placed in partial edentulous area of oral cavity and to suspect the possible causes leading to failure. 124 TG Osseotite implants that had been inserted between 2000 - 2002 were followed up for 2 years(avg : 9.5 months) in function. Medical records, and radiographs were evaluated and analyzed by the over all success rate, gender and age factor, general disease, implant fixture length and diameter, implant site, bone density, and various surgical methods. Chi square test was used statistically. Of the 124 TG Osseotite implants, 9 implants(7.3%) were removed in early phase and 3 implants(2.4%) were in late phase. The cumulative survival rate was 90.2%. The failure of the TG Osseotite implant was closely related with the use of bone graft techniques such as sinus elevation or immediate implantation and not with the age, sex, general disease, implant site, bone density of implanted site. The failure of the TG Osseotite implant was well developed when it was the wide type of implant and it was inserted for single tooth replacement. The developement of peri-implantitis was the most important factor in the failure of the TG Osseotite implant.

• 한국디지털건축인테리어학회논문집
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• 제13권3호
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• pp.5-14
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• 2013

In recent years, the change of urban function and the decrease in birth rate have given rise to merge, abolition and relocation of the existing schools. This study explores the possibilities for various land utilizations of disused school sites, aims to propose the effective asset management and the proper development methodology. Firstly it examines the status of small class school in urban area and the linkage complex development method. Among various methods, it compares the validity between the closed school management and public asset management method. In addition, it analyses the national finance method and public-private partnership investment as a proper development methodology to ensure both the common-benefit and profitable business. As a result of study, it prposes the BTO(build-transfer-operate) method to use effectively the disused school sites in urban area.

• Parasites, Hosts and Diseases
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• 제55권2호
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• pp.197-201
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• 2017

Shahr-e Sukhteh (meaning burnt city in Persian) in Iran is an archeological site dated back to around 3,200-1,800 BC. It is located in Sistan and Baluchistan Province of Iran and known as the junction of Bronze Age trade routes crossing the Iranian plateau. It was appointed as current study area for paleoparasitological investigations. Excavations at this site have revealed various archeological materials since 1967. In the present study, sheep and carnivore coprolites excavated from this site were analyzed by means of rehydration technique using TSP solution for finding helminth eggs. Dicrocoelium dendriticum, Capillaria sp., and Taenia sp. eggs were identified, while some other objects similar to Anoplocephalidae and Toxocara spp. eggs were also retrieved from the samples but their measured parameters did not match those of these species. The present paper illustrates the first paleoparasitological findings of Bronze Age in eastern Iran supporting the economic activities, peopling, and communication as well as the appropriate condition for zoonotic helminthiasis life cycle in Shahr-e Sukhteh archeological site.

• 대한환경공학회지
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• 제31권3호
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• pp.193-202
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• 2009

본 연구는 국내 중소 도시지역에서 강우 시 발생하는 강우유출수의 유출경향을 분석하고 초기강우기준을 산정하기 위하여 수행되었다. 연구지역은 국가산업단지가 소속되어 있는 구미시 원평동의 주거지역으로 선정 되었으며 모니터링 기간은 3개월에 걸쳐 시행되었다. 연구지역의 유역면적은 24.9 ha이고, 토지이용형태는 주거지역으로 대상유역의 80%가 불투수 면적(포장의 형태: 아스팔트)인 것으로 나타났다. 모니터링은 총 6회의 강우사상에 대하여 실시하였으며 모든 수질항목에 대해 EMC (Event Mean Concentration)와 SMC (Site Mean Concentration)를 산정하였다. 또한 강우지속시간에 따른 입경크기분포의 변화와 초기세척 현상을 관찰하였는데, 입경크기분포는 10%입경($D_{0.1}$), 50%입경($D_{0.5}$, 90%입경($D_{0.9}$이 각각 9.82 ${\mu}m$, 38.99 ${\mu}m$, 159.61 ${\mu}m$로 나타났고, 초기세척 현상은 용존성 물질보다 입자성 물질이 더 강하게 나타났다. $MFF_n$ (Mass first flush)을 이용하여 초기강우기준을 검토한 결과 초기우수유출수의 부피 30%에 오염물질부하량의 부피 44.4~58.5%를 포함하고 있는 것으로 나타났다. $MFF_n$과 입경크기분포는 자연형, 장치형 시설과 같은 다양한 비점오염저감시설의 설계 및 운전과 초기강우기준 결정을 위한 정보를 제공할 수 있을 것으로 기대된다.

• 한국농촌건축학회논문집
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• 제20권1호
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• pp.53-60
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• 2018

The purpose of this study is to present the basic data for the active use of closed schools by analyzing the actual conditions of closed schools in Gyeongnam area. As a method of this study, we examined the population change in Gyeongnam area through the literature survey and the internet site survey, and grasped the characteristics of the policies related to the closed school. Through the homepage survey of the local education financial alerts, we analyzed the contents, location, period after the closure, land area, and total floor area of the closed schools that have been in use or invaluable as of March 2017. As the results, In the case of self-utilization, the utilization rate of educational facilities was overwhelmingly high. In the case of lease utilization, the utilization ratio was higher in the order of education facilities, income increase facilities, and cultural facilities. Overall, 62.8% of the closed schools are located in the base towns (urban areas). The average of the period after the closure was 16.2 years, the land area average was $9,291.1m^2$, and the total area average was $1,153.8m^2$.

• Annals of Clinical Neurophysiology
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• 제7권1호
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• pp.34-36
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• 2005

Two hemiplegic cerebral palsy patients were studied to investigate the cortical mechanisms underlying preserved somatosensory capacity, using functional MRI(fMRI). Tactile stimulation was performed by brushing of palm, during fMRI study. By the affected hand stimulation, contralateral primary somatosensory cortex was activated in patient 1 and cortical area anterior to the lesion site was activated in patient 2. We suggest that reorganization of the somatosensory cortex after brain injury can be induced by recruitment of undamaged areas adjacent to lesion site.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 INTERNATIONAL SYMPOSIUM ON SOIL & GROUNDWATER ENVIRONMENT
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• pp.245-246
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• 2005

• 한국지반공학회지:지반
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• 제22권12호
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• pp.10-16
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• 2006