• 대한소아치과학회지
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• 제43권2호
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• pp.158-165
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• 2016

본 연구는 맥박산소측정기를 이용하여 광용적맥파 파형의 원데이터를 기록하고 분석함으로써 치수 생활력 측정에 이 원데이터 분석의 적용가능성을 살펴보고 정상 치수 생활력을 갖는 소아환자의 상악 중절치에 대한 광용적맥파 파형의 파라미터에 대한 기초 자료를 마련할 목적으로 시행되었다. 상악 중절치에 대해 정상 치수 생활력을 갖고 전신질환이 없는 30명의 환아(남 16명, 여 14명, 평균연령 11.4세)를 연구대상으로 선정하였다. 맞춤형 센서와 맥박산소측정기를 이용하여 측정하였으며 측정결과는 적색 파장과 적외선 파장의 원데이터 형태로 기록되었고 LabChart(v.7.3, ADInstruments, Germany)를 이용하여 분석하였다. 본 연구를 통해 소아에서 정상 치수생활력을 갖는 상악 중절치에 대한 광용적맥파 파형의 파라미터의 기준값을 제시할 수 있었으며 소아의 치수혈류측정에 이러한 광용적맥파 파형 분석이 활용될 수 있음을 확인하였다.

• 한국안광학회지
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• 제21권3호
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• pp.215-225
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• 2016

목적: 본 연구에서는 소프트콘택트렌즈의 재질 특성과 착색 여부가 눈물 성분이 침착된 소프트콘택트렌즈에 칸디다균 흡착에 미치는 영향을 알아보았다. 방법: Etafilcon A, hilafilcon B, nelfilcon A 재질의 투명 소프트콘택트렌즈와 써클 소프트콘택트렌즈를 대상으로 하여 인공눈물에 침착시키기 전과 후의 흡착 균 수를 측정하였다. 또한, 주사전자현미경을 통해 렌즈에 흡착된 균을 관찰하였다. 결과: 칸디다균의 흡착은 콘택트렌즈 재질에 따라 통계적으로 유의하게 차이가 있었다. Etafilcon A 재질에서는 투명 소프트콘택트렌즈와 써클 콘택트렌즈간 균 흡착양 차이가 없었으며, hilafilcon B 및 nelfilcon A 재질에서는 써클 소프트콘택트렌즈에 흡착된 균 수가 다소 많았다. 투명 중심부와 착색부를 비교하였을 때 투명 중심부에 칸디다균 흡착이 더 많았으며, 투명 중심부와 투명 주변부를 비교하였을 때 투명 주변부에서의 균 흡착양이 더 많았다. 눈물 단백질이 침착되었을 경우 흡착된 칸디다균의 수가 감소하였으며 눈물 단백질의 칸디다균에 대한 항균력 유지는 재질에 따라 차이가 있어 etafilcon A 재질 렌즈에서 유지 기간이 가장 길었다. 결론: 본 연구에서는 소프트콘택트렌즈의 재질 특성, 착색여부 및 부위에 따라 흡착되는 칸디다균수가 달라진다는 것을 밝혔으며, 칸디다균의 흡착 특성에 따라 관리 방법을 달리해야 할 것을 제안한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제34권2호
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• pp.151-156
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• 2008

Different kinds of forces can be applied to the biological tissue. The analysis of the applied force is highly important to explain the mechanism of cellular response. In this study, the applied force to the collagen gel was analyzed by the finite elements analysis. The model received two different kinds of static force (compression and tension). The force range was 50g to 400g. In results, von Mises stress was concentrated in the peripheral region in the compression model. It was concentrated in the central area in the tension model. However, the compressive force was high in the peripheral area of the compression model and the tensional force was also high in the same area of the tension model. In conclusion, the applied force could be different to the region and it should be considered in the experiment to analyze the effects of the mechanical force on the cells.

• 한국환경복원기술학회지
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• 제22권6호
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• pp.89-96
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• 2019

This study was carried out for management of the invasive alien plants in Mt. Inwang located in central Seoul. The invasive alien plants are 11 families, 34 genera, 30 taxa, and they are 10.8% of the total vascular plants(314 taxa). The ecosystem disturbed plants designated by the Korea environment ministry are 6 taxa : Rumex acetosella, Lactuca scariola, Ambrosia trifida var. trifida, Ambrosia artemisiifolia, Aster pilosus and Eupatorium rugosum. In the life-form, herbaceous perennials are 13 taxa(35.3%). In the continent of origin, the species from America are 20 taxa(58.8%). In the introduction time, the species of third period are 14 taxa(41.2%). In the diffusion grade, 5 grade species are 14 taxa(41.2%) and they are wide spread species. Mt. Inwang was designated as ecological scenery conservation area of Seoul in 2007. But Mt. Inwang is in high danger by the spread of invasive alien plants and ecosystem disturbed plants, due to artificial factors such as development pressure and the occurrence of byway trail. Therefore, Mt. Inwang needs systematic management of invasive alien plants and monitoring of long-term changes.

• Imaging Science in Dentistry
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• 제36권3호
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• pp.163-168
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• 2006

A 60-year-old female, who complained of delayed healing and swelling after extraction of left lower second molar during chemotherapy, visited our department. She had a history of a resection surgery of breast cancer and postoperative radiotherapy. The conventional radiographs showed diffuse permeative bone destruction in posterior mandibular body, which gave the first radiologic impression of osteonecrosis associated with radiotherapy or chemotherapy. And bone metastasis from the breast cancer was also considered in the differential diagnosis. On the enhanced computed tomography (ECT) the posterior mandibular body was occupied by a large expansile lesion showing central low attenuation with peripheral rim enhancement. Magnetic resonance images revealed that the low attenuated area on ECT did not show as high signal intensity as water on T2 weighted image and indicated solid component of a tumor. The final diagnosis was central squamous cell carcinoma. We present the diagnostic imaging features of the patient with special emphasis on the differential diagnosis.

• 한국조경학회지
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• 제26권1호
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• pp.70-82
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• 1998

The purpose of this study was to propose the community planting method through analyzing the plant community structure of three green space types and the relationship of vegetation and wild bird inhabitation of urban environmental forest in Seoul, Korea. The results from this study showed that the vegetation stratification, coverage, and species diversity were closely related to the wild bird inhabitation. In addition, the environmental forest in study site was analyzed as a negative factor that may decrease the biodiversity. Therefore the ecological structure and environmental condition must be considered in order to improve the quality of environmental forest. Based on results in three green space types, the planting species, density and species size for proper community planting were proposed in this study. The ecological niche relationships among sixteen selected species were also presented. The results will be provided as an valueable output for the completed community planting of urban green space in the central region, Korea.

• 천문학회보
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• 제37권1호
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• pp.57.2-57.2
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• 2012

We present a survey for finding hidden star clusters using the WISE data. There are more than two thousand star clusters in the current catalogs of star clusters in the Milky Way Galaxy. However, there are still numerous star clusters remaining to be discovered, especially, along the Milky Way. The WISE, NIR to MIR all sky survey, is an efficient source to find star clusters obscured by dust along the Milky Way. Taking the advantage of the power of WISE, we survey a wide area at ${\mid}l{\mid}<30^{\circ}$ and ${\mid}b{\mid}<6^{\circ}$, toward to the central region of the Milky Way to find new star clusters. To find cluster candidates, we used two kinds of method: the visual inspection and the brightness density investigation. We will report the progress of this survey.

• 지역연구
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• 제32권1호
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• pp.83-103
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• 2016

본 연구의 목적은 서울 대도시권 내 이주자의 주거 입지 선택의 결정 요인을 분석하는 것이다. 따라서 2010 인구주택총조사의 자료를 이용하여 이산선택모형을 구축하였다. 연구범위로 지난 5년 동안의 지역 내 이동 가구를 네 집단으로 분류하였다: 1) 서울에서 경기, 인천지역으로 이주한 가구, 2) 경기, 인천지역에서 서울로 이주한 가구, 3) 서울 내 이주가구, 그리고 4) 경기, 인천지역 내 이주가구. 본 연구의 주요 분석결과를 요약하면 다음과 같다. 첫째, 서로 다른 집단 사이에서 주거 입지 선택 결정 요인의 중요한 차이점들이 확인되었다. 둘째, 경기, 인천지역에서 서울로 이주한 가구는 적은 방 수를 가진 작은 주택을 선택하는 경향이 나타났고, 이는 그들의 주거 선택이 자발적인 선택보다는 서울에서의 높은 주거비용 압박에 의해 비롯된 것을 의미한다. 셋째, 모든 집단은 지하철을 포함한 대중교통에 대한 좋은 접근환경에 높은 선호를 가진다. 마지막으로, 근린주구의 어메니티 요소가 주거 입지 선택에 역시 중요한 영향을 미치는 것으로 분석되었다.

• 설비공학논문집
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• 제16권5호
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• pp.459-466
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• 2004

In order to save the energy in apartment houses, it is essential that the energy amount consumed in heating per household should be surveyed and analyzed according to heating method, which can be classified into unit, central and district methods. As a basis, we selected the household with nominal area of 32 py. because it accounts for the most percentage in Korea. It is estimated that the gas amount for cooking is 90 ㎥ and the energy amount for hot water supply is 11.41 GJ for a year, which is necessary to calculate the heating energy. Through the survey of actual energy consumption in Seoul and Gyeonggi, the energy amount used in heating can be obtained according to the heating type: 26.02 GJ/year for the unit heating, 28.09 GJ/year for the central heating and 40.61 GJ/year for the district heating.

• 대한건축학회논문집:계획계
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• 제35권5호
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• pp.73-83
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• 2019

The purpose of this study is to analyze the spatial transformational patterns according to the spectator and the exhibition environment and to examine the role of 'the middle space' organically linking the exhibition space with MoA which is a representative example of 'sequential exhibition space'. The concept of sequential exhibition space in MoA is applied not only to building but also to extended continental concepts including neighborhood. MoA's exhibition space consists of the library area and the exhibition area. In particular, the spaces of library area perform a complex function as a quasi-exhibition space, and the exhibition spaces have variable spatial transformation through an associated structure of the library area and the educational area. The types of exhibition space those constitute the sequential exhibition space of MoA appear as 'Room type', 'Free plan type', and 'Gallery type'. Each exhibition space maintains independence, but it is changed according to the situation of exhibition. The flow is based on the spiral induction around the central void space, but with selective circulation considering the visitors. Therefore, through the transformation of the exhibition area and the division of the flow, the whole museum space appears as the area differentiation.