• 한국주거학회논문집
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• 제19권3호
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• pp.59-70
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• 2008

The purpose of the study was to suggest the housing alternatives for the elderly from the viewpoint of aging in place. The study was intended to present the alternatives on the basis of the concept of group home and shared housing. In order to achieve it, first, the concept and characteristics of group home and shared housing were examined. Then, the living conditions of the elderly and the home sharing related needs of them were examined. The subjects were 201 older persons whose age was more than 65 years and lived in detached houses. Results were as follows; 1) It was identified that group home and shared housing were acceptable to the subject aged. 2) The modified group home which consisted of less than 10 individual detached houses and common area was presented as an alternative for the elderly. The individual ones were existing ones which the elderly lived in. The common area included of common kitchen, dining room, bathroom, and living room for about 10 old persons. The common area can be provided by building a new one and remodeling the existing building for other purpose or community center for the elderly. The detached houses which had spare bedrooms can be shared by another old persons. This alternative would be economic and useful to the elderly.

• 한국소음진동공학회논문집
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• 제17권12호
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• pp.1184-1194
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• 2007

Recently, framed structure is increasingly being used as apartment structure due to the advantages during remodeling. Therefore, the use of lightweight panel as separating wall is increasing. To construct lightweight panel structures with sound insulation performance appropriate to the conditions of each field, measurement of sound reduction index(SRI) through panel structures should be performed. In this study, measurement of SRI through 46 kinds of panel structures was performed in the condition of various factors such as surface density, air space and absorber. The result showed that SRI of panel structures was generally higher by increasing of surface density. In the case of double panel with no absorber, SRI at below critical frequency was gradually increased according to rise of air space. Double panel with absorber make remarkable improvement in SRI at low frequency, but there is a little difference compared with SRI of double panel with no absorber over critical frequency.

• KIEAE Journal
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• 제10권6호
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• pp.55-66
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• 2010

The government is enacted "Housing Performance Grading Indication System" from qualitative housing supply policy and performance of housing under the background of looking for new plan to secure good housing stock and housing performance. This system consists of 5 main performance section, 14 performance categories and 20 detailed performance items. 5 main performance parts are sound insulation related grading(Light-weight impact sound insulation, heavy-weight floor impact sound insulation, noise emission in bathroom, airborne sound insulation for wall between units), Long-life housing related grading(flexibility, remodeling & maintenance, durability), environment related grading(landscape, indoor air quality and ventilation, energy performance), Living environment related grading(common resident facilities such as playground and consideration for the socially underprivileged such as the aged), Fire fire prevention grading(fire fire prevention). The purpose of this research is to analyze characteristics and assessment results of 20 detailed performance items on "Housing Performance Grading Indication System" which was enforced 240 cases from Jan 9th, 2006 to Sep 30th, 2010. The analysis of approval condition of detailed performance items will be important comments for understanding the current domestic level and development of technology.

• 한국구조물진단유지관리공학회 논문집
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• 제11권5호
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• pp.71-80
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• 2007

기존 시멘트에 비해 우수한 인장변형성능을 가지는 고인성 시멘트 복합체(HPFRCC)를 보수, 보강에 적용 시키려는 연구가 최근 활발히 진행되고 있다. 본 연구에서는 HPFRCC의 일종인 ECC와 초속경 숏크리트인 MDF의 보강성능을 알아보고자 한다. 실험체는 실존하는 철근콘크리트 구조물의 전단벽을 1/2 축소하여 제작하였으며 개구부를 가지고 있다. 실험결과 WB-MDF, ECC는 WB-0.23에 비해 각각 28.4%, 48.4%의 강도증가를 보였으며, 특히 WB-ECC가 WB-MDF에 비해 연성면에서 우수하게 나타났다.

• Imaging Science in Dentistry
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• 제51권2호
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• pp.203-208
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• 2021

Ghost cell odontogenic carcinoma (GCOC) is a rare malignant neoplasm characterized by the presence of ghost cells. It is considered to originate from either a calcifying odontogenic cyst(COC) or a dentinogenic ghost cell tumor(DGCT). Its clinical and radiographic characteristics are non-specific, including slow growth, locally aggressive behavior, and eventual metastasis. This case report describes a 43-year-old Thai man with plain radiographs and cone-beam computed tomographic images revealing a unilocular radiolucency with non-corticated borders surrounding an impacted left canine associated with radiopaque foci around the cusp tip. Based on the microscopic findings, the lesion was diagnosed as GCOC. Partial maxillectomy of the right maxilla was performed, and radiotherapy was administered. An obturator was made to support masticatory functions Three years later, the lesion showed complete bone remodeling and no signs of recurrence, and long-term follow-up was done regularly.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제32권6호
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• pp.511-520
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• 2010

Purpose: This study was conducted in order to compare the efficacy of osseointegration of three different calcium metaphosphate (CMP) coated implants in the rabbit's femur. Materials and Methods: Twenty four rabbits and three different type of CMP coated implants and RBM implants were used in this study. The animals were divided into 4 groups on the basis of implant surface characteristics. Two implants were installed into the condyle of femur of each rabbits. The animals were sacrificed at 2 and 4 weeks after installation. The undecalcified specimens were prepared for histological, radiological examination and histomorphometric analysis of implant-bone contact ratios (BIC) and bone area ratio (BA). Results: Two implants were failed to osseointegrate and implant success rate was 95.2%. There were not any significant inflammatory response in all groups. Fluorescent image at 4 weeks shows that remodeling is slower in RBM group than CMP group. CMP III showed more active remodeling than CMP I, II. In histomorphologic analysis, BIC ratio at 2 weeks was lower than 4 weeks. Conclusion: The results suggest that the ratios of CMP coated implants were higher than that of RBM control group but there is no significantly difference between RBM group and CMP group. In conclusion, CMP coated implant had more clinical availability than RBM implants.

• 한국건축시공학회지
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• 제11권3호
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• pp.301-309
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• 2011

현재 국내 주택의 근간을 이루는 내력벽식 공동주택은 구조적 한계로 인해 단수명화되고 있다. 이로 인해 발생하는 재건축은 막대한 자원 및 에너지 소비와 건설폐기물로 인한 환경오염을 유발하고 있다. 정부는 이러한 문제 해결의 방안으로 리모델링이 가능한 라멘구조를 유도하는 인센티브 제도를 시행하고 있다. 따라서 새로운 개념을 적용한 라멘구조의 공동주택을 위하여 개발된 복합PC구조인 Green Frame은 내력벽식 및 기존 라멘조식 공동주택이 리모 델링이 어렵다는 단점을 개선할 수 있을 뿐만 아니라 공사기간 단축이 가능할 것이다. 그러므로 본 연구에서는 Green Frame의 특성과 절대공기를 분석하고, 구조별 공동주택의 골조공사 공기와 비교 분석하여 차이점을 규명하였다. 그 결과 Green Frame을 공동주택에 적용할 경우 공기단축이 가능한 것으로 나타났다. 따라서 건설공사에서 공기는 매우 중요한 요소로 향후 성공적인 공동주택의 사업을 위해서 중요한 핵심기술로서의 역할을 할 수 있을 것으로 사료된다.

• 한국건설관리학회논문집
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• 제16권3호
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• pp.123-131
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• 2015

온실가스 배출 감소 및 에너지소비량을 감소시키기 위하여 많은 정책들이 수립되고 있다. 그러나 이러한 정책은 건축물의 에너지 소비 특성을 고려하지 않고 건축물에 대하여 일괄적인 에너지 절감률을 적용하고 있다. 일괄적인 에너지소비량 절감율을 일괄적으로 적용할 경우, 에너지소비량이 적은 건축물은 이를 달성 할 수 없다. 따라서 본 연구에서는 건축물의 에너지소비특성에 따른 건축물 분류와 건축물의 에너지소비량에 따른 개별적인 에너지소비량 절감률 산정 방법에 대하여 연구하였다. 에너지소비량 특성 분석결과 건축물의 용도에 따라 에너지소비량 차이가 있음이 나타났다. 또한 이를 바탕으로 건축물을 분류하였다. 또한 기존의 건축물 에너지절감과 관련한 제도들을 분석하여 건축물의 에너지소비량 절감 목표 및 대상 등을 선정하였고. 이을 바탕으로 에너지소비량에 따른 에너지 소비량 절감률 공식을 제안하였다. 또한 서울시 공공건축물 중 제1종 근린생활시설에 본 연구에서 제안한 공식을 적용할 경우 국가 온실가스 배출로드맵에서 목표로 하고 있는 절감률 26%를 달성할 수 있음을 확인하였다. 본 연구를 통하여 건축물의 개별적인 목표 에너지절감률을 산정할 수 있지만, 건축물 목표 에너지 절감률을 실제건축물에 반영하기 위해서는 건축물의 에너지소비량과 에너지소요량의 관계 및 건축물에서 절감 가능한 에너지소비량에 대한 연구가 필요하다.

• 한국토양동물학회지
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• 제4권2호
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• pp.101-106
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• 1999

지렁이 꼬리재생 초기에 발현되는 피브리노겐 분해효소의 활성은 세포외기질의 재구성에 연관되어 있을 것으로 생각된다. 본 연구에서는 지렁이의 꼬리 재생 중에 발현된 피브리노겐 분해효소의 활성과 특성을 밝히고자 하였다. 지렁이의 꼬리 재생 중에 발현되는 피브리노겐 분해효소는 최소 7개이며 그 분자량은 각각 58, 45, 32, 27, 23, 19 그리고 12kDa로 측정되었다. 피브리노겐 분해효소의 활성은 절단 후 1일부터 효소의 활성이 나타나서 7일까지 거의 유사한 정도의 활성이 유지되었으며, 7일 이후부터는 이 효소들의 활성이 급격히 감소하여 14일에는 그 활성이 대조군 수준으로 회복되었다. 지렁이 꼬리 재생 중 발현된 모든 피브리노겐 분해효소는 PMSF와 aprotinin를 처리하였을 때 효소들의 활성이 억제되었다. 또한 Ca$^{2+}$의 제거는 이효소의 활성에 영향을 미치지 않는 것으로 나타났다. 이러한 결과를 통하여 지렁이 꼬리재생시 발현되는 피브리노겐 분해효소는 serine계 단백질 분해효소임을 알 수 있었다.

• 한국임상수의학회지
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• 제40권2호
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• pp.93-103
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• 2023

The tendon is a dense connective tissue that connects muscle to bone and plays an essential role in joint motion. The injured tendon heals slowly owing to its low cellularity and vascularity. This study aimed to evaluate and compare the effects of regenerative injection therapy (RIT), 20 % dextrose prolotherapy (DP), and platelet-rich plasma (PRP) injections that can promote tendon healing. Twenty-one New Zealand white rabbits were divided into the control, DP, and PRP treatment groups. The superficial digital flexor tendon (SDFT) of the right hindlimb of each rabbit was used. A round defect of 2 mm was induced. Approximately 0.2 mL of 20% dextrose and autologous PRP were injected into the proximal and distal ends of the SDFT mass. Radiographic and ultrasonographic examination and cross-sectional area (CSA) calculations were performed pre-operatively and at 2, 4, and 8 weeks. The SDFT of both limbs was transected for biomechanical and histomorphometric evaluations. The SDFT of the left limb was transected for intact control. Semi-quantitative analysis was performed to evaluate the histomorphometric properties. Additional analysis was performed using H&E, Masson's trichrome, and immunohistochemical staining. The biomechanical evaluation showed that the treatment groups had higher tensile strength compared to the defect control group, while the PRP group had higher tensile strength than the DP group. On histological examination, the treatment groups appeared to be relatively closer to the remodeling phase of the healing process than the defect control group; the characteristics of the PRP group were closer to the remodeling phase than those of the DP group. The ultrasonographic examination showed different tendencies. Increased values in the CSA were observed during the early period in the treatment groups. This study suggests that PRP and DP can promote the healing of tendon injury, and these effects were superior with PRP than that with DP.