취수정에서 필터층이 미치는 영향에 대한 실험적 연구

송재용 ( Jea-yong Song ),김기준 ( Ki-joon Kim ),오삼주 ( Sam-ju Oh ),이근춘 ( Geun-chun Lee ),정교철 ( Gyo-cheol Jeong ) 대한지질공학회 2016 지질공학 Vol.26 No.3

본 연구는 실내시험을 통해 필터층을 가진 충적층 지하수 정호에 대한 효율을 평가하기 위해 수행하였다. 이중필터층과 단일필터층을 모사한 시험장치를 제작하여 시험 및 분석을 수행하여 초기취수량, 취수효율, 장기적인 안정성에 대해 평가하였다. 시험결과 초기 60분 이내 취수량을 분석하면, 이중필터를 설치한 경우에는 그렇지 않은 경우보다 초기 취수량이 약 19.4% 증가하는 것으로 분석되었으며, 시험 후 24시간이 경과한 후 취수량을 분석한 결과 이중필터취수정이 단일필터 취수정에 비해 68.9% 높은 것으로 분석되었다. 또한, 시험결과를 토대로 취수량이 50% 이하로 저감되는 시점을 유추해 보면 단일필터의 경우 약 1.35일의 시간이 경과하는 것으로 분석되었으며, 이중필터의 경우 38.66일 소요되어 장기적인 안정성 면에서 이중필터를 설치하는 것이 매우 유리한 것으로 평가되었다. This study was performed in order to evaluate the efficiency of groundwater well installed in alluvial aquifer that has filter layers, using laboratory experiment. We manufactured test equipment that can simulate dual filter layer and single filter layer and evaluated the initial volume of water intake, pumping efficiency, and long term stability using the experiment and analysis. In an early stage within 60 minutes, the case that took the dual filter showed an increase of 19.4 % in the initial volume of water intake compared to the case without it. It was found that after 24 hours of the test, the well installed with the dual filter showed higher than 68.9% compared to the well with single filter. It was calculated that it took 1.35 days to reach the point corresponding to the half of the water intake in case of single filter while it took 38.66 days to do so in case of dual filter. Therefore, it is highly recommended that the well with dual filter is much more favorable in the long term stability.

가성 부갑상선 기능저하증의 이형 석회화 치험례

윤성원,송재용,김정헌,Yoon, Sung-Won,Song, Jea-Yong,Kim, Chung-Hun 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.3

Purpose: Pseudohypoparathyroidism is a hereditary disorder characterized by symptoms and signs of hypoparathyroidism, typically in association with distinctive skeletal and developmental defects. Hypoparathyroidism is caused by a insufficient end-organ response to PTH (parathyroid hormone). Hypoparathyroidism consists of four types in which the most common form, pseudohypoparathyroidism-Ia, accompany with Albright's hereditary osteodystrophy. We experienced a case of a woman who had been suffering from calcified mass on left foot, diagnosed Albright's hereditary osteodystrophy. Methods: We present a case of a 24-year-old Korean female who visited plastic surgery department with a painful mass on dorsum of the left foot. On the physical exam, bony hard and painful mass, fixed to dermis, was noted. Plain X-ray films demonstrate suspicious calcification on subcutaneous tissue of dorsum of the left foot. The patient was diagnosed pseudohypoparathyroidism 2 years ago at the plastic surgery department. At the visiting time, the laboratory results were within normal range even though the patient actually had a disease. The reason is because the patient has been treated with Vit.D, calcium replacement therapy and thyroid hormone therapy. Moreover, the patient has been treated with anticonvulsant agents due to epilepsy. On the brain computer tomography (CT), calcification was noted on the basal ganglia and dentate nucleus. So we decided the total excision of entire mass from the left foot. Results: We excised main mass with numerous pinhead sized masses which were scattered around the main mass. The $6.0{\times}4.0{\times}0.5\;cm$ sized main mass was bony hard, and its surface was flat and margin was irregular. The permanent biopsy was confirmed that the main mass and all the scattered tiny masses were heterotopic calcification. The patient did not suffer from the pain after the mass excision. The wound has been healed without any problem. Conclusions: Heterotrophic calcification is often accompanied with pseudohypoparathyroidism, but such a huge one is uncommon. We report a case of pseudohypoparathyroidism with heterotrophic calcification developed in dorsum of left foot who was diagnosed by excisional biopsy.

이태환의 『조선미』에 나타난 공간성 연구

유용태 ( Yu Yong-tae ),송재용 ( Song Jea-yong ) 아시아문화학술원 2018 인문사회 21 Vol.9 No.3

이 연구의 목적은 이태환의 『조선미』에 나타난 공간의 구조와 양상을 살펴보고 그 공간성을 규명하는 데 있다. 『조선미』는 1945년 9월에 간행된 시집으로 해방 후 최초로 간행된 시집이며 자아를 목도함으로써 정신적 사유를 보여주는 시집이다. 해방 후 첫 시집이라는 사적 의의에도 불구하고 『조선미』에 대한 연구는 찾아보기 힘들다. 『조선미』는 공간의 구성방식을 달리함으로써 공간성을 지니게 된다. 그 공간은 시적 대상과 화자를 구분하는 자연공간과 화자와 공간을 동일화하는 환경공간으로 나누어진다. 자연공간에서 순수성과 우월성을 부각함으로써 민족성을 내포하며 환경공간은 화자와 공간을 동일시하여 자아완성 내지 자아발현의 공간성을 지니고 있다. 해방 공간의 혼란스러움에서 『조선미 』는 민족과 자아발현이라는 공간성을 구현하고 있다. 본 연구는 『조선미』에 대한 연구의 첫 시작이다. 해방 공간이라는 시대적 상황과 관련된 『조선미』에 대한 연구는 앞으로의 과제로 남겨둔다. The goal of this study is to seek the presented space structure and appearance, also to investigate spatiality of ‘The beauty of the Joseon’ by Tae Hwan Lee. ‘The beauty of Joseon’ which is the first published book of poems on September in 1945 right after the Korean independence shows the spiritual thinking through self-witnessing. This book of poems hardly has been studied, even though it has the historical meaning of the first book of poems after the independence. ‘The beauty of the Joseon’ creates unique extensity with using different approaches of space structures. The space structure contains two separate spaces; natural spaces that divide between the poetic speaker and the object, and environmental spaces that synchronizes the speaker and space. The natural spaces in ‘The beauty of the Joseon’ contains the meaning of ethnicity by emphasizing superiority and purity. The environmental space presents self-completion and self-revelation based on synchronizing the view of the speaker and space. ‘The beauty of the Joseon’ realizes the self-revelation and ethnicity during the chaotic state of affairs after the independence. this study is just the first step in learning and understanding ‘The beauty of Joseon’ An intensive study of the space of liberation in ‘The beauty of the Joseon’ will be noted in further studies.

광물찌꺼기 적치장 유지관리를 위한 모니터링 방안 연구

오삼주 ( Sam-ju Oh ),김기준 ( Ki-joon Kim ),송재용 ( Jea-yong Song ),최의규 ( Uikyu Choi ) 대한지질공학회 2016 지질공학 Vol.26 No.4

본 연구는 환경유해시설인 광물찌꺼기 적치장의 효과적 유지관리를 위한 모니터링 방안을 수립하기 위해 수행하였다. 광물찌꺼기 적치장 유지관리를 위한 모니터링은 세분된 점검항목 및 평가항목의 선정을 통해 상세한 조사가 필요하며, 조사결과를 효과적으로 활용하기 위하여 불량정도 및 그 진행성 여부에 대한 평가가 필요하다. 따라서 모니터링 항목을 옹벽구조물(콘크리트옹벽, 석축, 돌망태) 및 일반시설물(차수층, 복토층, 사면, 광물찌꺼기, 우수배제시설, 침출수, 식생)로 점검항목을 세분하고, 각 항목별 모니터링 결과에 대한 상태평가를 수행하여 등급 및 점수화를 통해 체계적인 유지관리가 될 수 있도록 모니터링 개선안을 제안하였다. 개선안에 따른 현장 적용성 평가 결과, 기존 모니터링에 비해 최대 16건(우수배제시설)의 하자 발생 건수가 추가로 확인되는 등 기존 모니터링에 비해 세부적인 평가가 가능한 것으로 확인되었으며, 등급에 따른 광물찌꺼기 적치장별 종합점수는 금장광산이 89.3점으로 가장 양호하고 거풍광산이 22.2점, 화천광산이 27.8점으로 가장 불량한 것으로 확인되었다. 이와 같이 개선안을 적용할 경우, 보다 상세한 모니터링을 수행할 수 있고 각각의 항목에 대한 정량적인 평가가 가능하다. 이러한 정량적 평가는 향후 광물찌꺼기 적치장의 보수 우선순위를 결정하고 중점관리항목 선정, 유지보수 계획수립에 활용될 수 있을 것으로 판단된다. This study aims to establish a monitoring method for managing the effective maintenance of tailings dams. The monitoring of a tailings dump area involves several parameters and their investigation through a selection of evaluation items. The extents of defects and progressive failures also need to be effectively estimated. Therefore, the monitoring items can be subdivided into categories relating to the retaining wall structure (concrete wall, reinforcing stone wall, mesh gabions) and general facilities (liner, covering soil, slope, tailings, rain protection facility, leachate, planting), and quantitative evaluations can then be conducted for each condition. In doing so, we developed a systematic monitoring method that assesses the dam maintenance condition with grades and scores. The field application of the monitoring method results showed it to provide a more detailed evaluation than existing monitoring methods: the method detected an additional 16 defects missed by conventional methods. The evaluation gave scores of 89.3, 22.2, and 27.8 to the Geumjang mine tailings dam, the Gupoong mine tailings dam, and the Hwachun mine tailings dam, respectively. The advanced method can provide quantitative evaluation and perform detailed monitoring of the dams. This quantitative evaluation can be used to decide on maintenance priorities, select the main management items, and establish schedules of maintenance.