• 한국구조물진단유지관리공학회 논문집
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• 제10권2호
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• pp.143-152
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• 2006

건축물의 초고층화에 따라 최근 고성능 콘크리트의 사용이 증가하고 있다. 이러한 고성능 콘크리트는 고강도, 고유동, 고내구성 등 다양한 성능을 발휘하지만, 화재시 폭열에는 약한 것으로 알려져 있다. 본 연구는 PP섬유 혼입 및 마감재 변화에 따른 고성능 RC 기둥의 폭열방지 성능을 검토한 것이다. 실험결과 내화시험 후 폭열특성으로, 먼저 플레인의 경우 심한 파괴 폭열과 함께 철근이 노출됐고 내화뿜칠로 마감한 고성능 콘크리트는 내부 수분의 영향으로 플레인보다 더욱 심한 폭열을 나타냈다. 또한, 마감재 변화에 따른 시험체의 폭열특성으로는 내화도료로 마감한 경우가 가장 우수한 폭열방지 효과를 나타냈으며 폴리프로필렌 섬유를 0.1%혼입한 콘크리트는 3시간 가력 내화시험 후 가장 안전한 폭열방지 성능을 입증하였다.

• 한국가정과교육학회지
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• 제16권1호
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• pp.19-30
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• 2004

전통한지는 서양의 종이에 비해, 보존성, 유연성, 강도, 통기성, 자외선 차단성 등 여러 우수한 성능 등을 가져 단순히 '종이' 이상의 기능을 하였다. 즉 우리 조상들은 생활 속에서 서적용지뿐 아니라 주거용(창호지, 장판지), 의류 및 생활용품의 소재 등 다양한 용도로 활용하였다. 그러나 현대에 와서는 대량생산되는 새로운 재료들에 밀려 점차 생활 속에서 자취를 감추는 듯했다. 하지만 많은 우수한 물리$.$화학적 성능, 전통미, 환경 친화적인 요소, 뛰어난 공예 활용성 등으로 오늘날 새로이 조명 받고 있어. 21세기 학교교육현장에서 '환경교육'. '창의성교육'. '전통문화교육' 위한 수업소재로서 교육적 활용가치가 충분하다고 본다. 본 연구에서는 초등 실과 바느질 수업에 전통한지를 활용하는 방안을 모색하고자, 한지의 특성 및 용도. 한지공예의 종류 등에 대해 선행연구 및 참고자료를 통해 고찰해 보았다. 또한 한지를 바느질 소재화 하기 위한 가공처리를 학교교육에서 바느질소재로 활용하기 위한 구체적인 방법과 함께 제시하였다.

• 대한원격탐사학회지
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• 제26권5호
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• pp.465-475
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• 2010

분광라이브러리는 지구에 존재하는 다양한 물질의 분광반사 자료와 그에 대한 보조자료를 축적한 데이터베이스로 정의할 수 있다. 분광라이브러리는 다양한 분야에서 물질의 종류와 특성을 분석하기 위한 참조자료로 사용되고 있으며 원격탐사 분야에서는 광학영상 자료와 연계하여 토지 피복의 종류와 속성을 분류하고 더 나아가 초분광영상의 해석에 중요한 자료로 사용되고 있다. 현존 분광라이브러리는 측정항목이나 측정방법, 보조자료 등이 표준화되어 있지 않으며, 특히 국내에 직접 적용하기에는 지표물의 종류가 한정되어 있다. 이 논문은 국내 환경에 직접 적용할 수 있는 분광라이브러리를 설계하고 구축하는 과정을 인공물에 대한 분광반사측정을 실시하였고 동시에 설계된 보조자료의 항목에 대한 측정 및 조사를 실시하였다. 또한 외국에서 개발된 분광라이브러리에서 보조자료가 충실한 광물 및 암석, 토양, 물 등의 분광반사자료를 함께 포함하고 있다. 구축된 분광라이브러리의 활용성 증대와 검색의 용이성을 위해 분광라이브러리 뷰어를 개발하였다.

• Current Research on Agriculture and Life Sciences
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• 제33권2호
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• pp.41-47
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• 2015

본 연구는 온실용 피복재 및 보온재의 조합에 대한 시뮬레이션 해석모델을 개발하여 관류열전달계수를 산정하고 측정된 결과와 비교하여 타당성을 평가하기 위해 수행되었으며 결과를 요약하면 다음과 같다. 유리이중피복의 경우 이중피복 사이의 공기층이 두꺼워짐에 따라 관류열전달계수가 서서히 작아져서 공기층 두께가 25 mm 이상이 되면 관류열전달계수의 변화가 거의 없는 것을 확인할 수 있었다. 또한 온도차가 증가함에 따라 관류열전달계수도 증가하는 것을 확인할 수 있었다. 두 플라스틱 피복재 사이에는 대류에 의한 열전달이 활발하게 일어나기 때문에 비정상 유동에 의한 열전달이 발생하고 이로 인해 온도분포도 비선형적으로 변하는 것으로 사료된다. 플라스틱 피복재 및 보온재들의 간격이 50~200 mm범위에서 변화할 때에 피복재의 간격은 관류열전달계수 큰 영향을 미치지 않는다는 사실을 확인할 수 있었다. 천공복사를 고려한 경우와 고려하지 않은 경우 모두 핫박스의 내외부 온도차가 $30^{\circ}C$인 조건에 대해서는 수치해석결과와 실험결과가 대체로 잘 일치하였다. 따라서 핫박스의 내외부 온도차가 $30^{\circ}C$ 이상인 조건에서 수치해석을 통해 관류열전달계수를 산정한다면 신뢰성 있는 값을 얻을 수 있을 것으로 판단된다.

• 한국의류학회지
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• 제42권1호
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• pp.172-182
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• 2018

The purpose of the present study was to quantify the thermal insulation of garments by item and examine factors influencing clothing insulation. A total of 769 garments in clo unit were collected and classified into 12 categories: blouses/shirts (95 items, BS), T-shirts/sweaters (62 items, TS), vest (23 items, VT), cardigans (23 items, CD), jackets/coats (75 items, JC), sport outerwear (including padding jackets)(48 items, SO), trousers (23 items, TR), skirts (56 items, SK), dresses (28 items, DS), underwear (150 items, UW), sleepwear (50 items, SW), and personal protective clothing (59 items, PPC). The results showed that clothing insulation was $0.21{\pm}0.01clo$ for the BS, $0.22{\pm}0.01clo$ for TS, $0.12{\pm}0.00clo$ for VT, $0.23{\pm}0.02clo$ for CD, $0.40{\pm}0.02clo$ for JC, $0.49{\pm}0.03clo$ for SO, $0.21{\pm}0.01clo$ for TR, $0.18{\pm}0.01clo$ for SK, $0.34{\pm}0.03clo$ for DS, $0.09{\pm}0.01clo$ for UW, $0.42{\pm}0.03clo$ for SW, and $0.56{\pm}0.03clo$ for PPC (p<.001). The most influential factors among the seven factors for thermal insulation of garments were clothing weight and covering area; however, the explanatory powers of two factors differed according to clothing categories. The covering area had more significant impact on clothing insulation in cardigans, jackets/coats, trousers, and dresses than clothing weight. Covering areas and clothing weight were the most influential factors in the following categories: blouses/shirt, T-shirts/sweaters, skirts, sleepwear and personal protective clothing. The garment weight was the most important factor for thermal insulation for the sport outerwear.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제12권3호
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• pp.57-62
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• 1990

Many alloplastic materials have been used as the bony substitute in large bony defects caused by fracture, periodontitis, & cyst, etc. Nowadays Hydroxyapatite(HAP) is the most usable material as the bony substitute. The reasonable properties of HAP are nontoxic, biocompatible to host tissues & have osteoconductivity. Other bioceramic materials are recommended as the bony substitute with high success rate. We have studied the clinical use of HAP as the bony substitute in the defected area caused by cyst. The reasonalbe & successful results are obtained. The results were as followed. 1. Better prognosis was obtained in the case of HAP & bone mixed graft than HAP graft only. And the best prognosis was obtained in the case of iliac bone graft. 2. Better prognosis was obtained in Mx. than in Mn. 3. It seems that the soft tissue ingrowth into the HAP granule play an important role in the success of the HAP graft. 4. Though the flap covering the HAP granules was perforated, the relative good prognosis was obtained by re-suturing the perforeated site.

• 대한가정학회지
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• 제47권3호
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• pp.1-9
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• 2009

This study was conducted to examine how patchwork was expressed in fashion based on theoretical background on its brief history and expression styles and to show its possibility of creating ways for new expression in modern fashion. This study reviewed literatures on definition, history and styles of patchwork and investigated mainly works, which had been presented in collections home and abroad since 2000, to analyze its expressive characteristics shown in modern fashion. According to analysis on the expression of patchwork, it used various painting techniques such as patterns, colors and surface effect. It included patchwork having patterns provoking elusion of fairy tails; containing painting expression of reproducing works of artists; using colors boldly and contrasting strong primary colors directly to establish purity of painting and to pursuit characteristic expression; and using expression techniques of pure art such as gradation and cutting. Second, it used a compromise expression in materials, methods and substances. Patchwork which had used cloth without a pattern or printed fabric, utilized various materials like vinyl, paper, leather, metal and plastic and had a figurative value showing a solid expression as an objet itself with new techniques and changes of connecting methods. Thirdly, it used tradition patchwork techniques. Pieced patchwork, crazy patchwork and images of traditional odd ends of cloth covering a meal were applied to a whole area or a part of cloth to avoid monotony of design and to use it as a decoration.

• KIEAE Journal
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• 제16권1호
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• pp.11-19
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• 2016

Purpose: PMV, PET, and similar thermal comfort indices and microclimate modeling have recently become actively used to evaluate thermal comfort. This study will look at pedestrian roads with diverse spatial characteristics on university campus using the ENVI-met model as the base for onsite measurement. Method: The PET was used as the thermal comfort index. The first microclimate measures were collected on September 20, 2014, and the second microclimate measures were collected on June 1, 2015. The ENVI-met model was used at the same time. Result: As a results, Onsite measurement results differed depending on the PET spatial characteristics. The location associated with the most discomfort had a PET of $47.8^{\circ}C$. The spatial characteristics of this place included a with no shade. The most comfortable location had shade, and the PET was $24.6^{\circ}C$. When the ENVI-met model and onsite measurements were compared, similar patterns were found, but with a few differences at specific points; this was due to the limitation of using input materials such as trees, buildings, and covering materials with the ENVI-met model. This factor must be thoroughly considered when analyzing modeling results.

• 교육녹색환경연구
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• 제12권1호
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• pp.25-34
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• 2013

As the construction industry develops, environmental pollution gets increasingly serious, giving damage including the increase of incidence of respiratory diseases and skin diseases among children with weakened immune systems, rather than adults. In daycare centers, infants and children spending much of their time, have high frequency of contact with the interior floor finish material. However, the majority of the child care centers don not use eco-friendly flooring but ordinary monorium flooring, because the initial investment cost of the eco-friendly flooring is higher than ordinary monorium flooring. Therefore, in this study, life cycle costs including the initial investment cost of the eco-friendly flooring and ordinary monorium flooring were calculated, demonstrating that the eco-friendly flooring is more economical than ordinary monorium flooring in terms of life-cycle cost. In addition, the analysis of the environmental performance also showed the excellence of the eco-friendly floor finishes. It is expected that the use of the eco-friendly floor finishes will increase due to their excellence in the aspect of life cycle cost and eco-friendly performance, through this study.

• 대한치과의사협회지
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• 제46권4호
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• pp.222-231
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• 2008

Various maxillary sinus floor augmentation techniques were common performed and in the most cases, many kinds of bone graft materials were used. The graft materials are autogenous bone or other biomaterials of human, animal or synthetic origin. But these cases report describes a new surgical technique by which dental implants are inserted in a void space created by elevating the sinus membrane without additional graft material in atrophic posterior maxilla. We created lateral bony window using piezoelectric device and elevated the schneiderian membrane in five patients and was repositioned with bony window in five patients, without any bone graft. From the clinical and histological results, it is found there is potential capacity for bone formation and placement of implants in the maxillary sinus without the use of bone grafts or bone substitutes.