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치관, 치근 상아질에서 우식의 진행에 따른 Matrix Metalloproteinase- 8과 13의 서로 다른 발현 양상에 관한 연구
이태연 대한구강악안면병리학회 2016 대한구강악안면병리학회지 Vol.40 No.1
Background: Matrix metalloproteinases (MMPs) are proteolytic enzymes involved in degradation of the extracellular matrix. MMP-8 has been reported to be involved in the degradation of collagen in progression of dental caries. MMP-13 was found to be expressed in both normal and caries pulp, implying its involvement in the pathogenesis of dental caries. Methods: Four extracted teeth were used. They were categorized into four grades according to caries progression. Three sections were prepared from each separated crown and root. Immunofluorescence of the FITC of the MMP-8 and 13 in coronal and radicular dentin was analyzed by confocal microscopy. Results: Immunofluorescence signals that were indicative of MMP-8 were observed both in radicular and coronal dentin in the sound, C1 and C3 carious teeth. In C2 carious teeth, immunofluorescence signals that were indicative of MMP-8 were observed only in radicular dentin. Immunofluorescence signals that were indicative of MMP-13 were observed both in radicular and coronal dentin in the sound teeth. In C1, C2 and C3 carious teeth, immunofluorescence signals that were indicative of MMP-13 were not observed both in radicular and coronal dentin. Conclusion: Immunofluorescence signals revealed that MMP-8 and 13 were present in coronal and radicular dentin, and was differently expressed as caries progressed.
이태연,신준 한국기계기술학회 2018 한국기계기술학회지 Vol.20 No.4
In this study, high thermal efficiency and eco-friendly coffee roaster is developed. The core element of coffee roaster is a roasting drum and most of the coffee roasting drum is a flat cylindrical barrel type. From the traditional shape of cereal puffing machine, we got the idea of the roasting drum. Oak barrel shape is well known high thermal efficiency system in korean heating cook system. Therefore, we designed the coffee roaster containing the oak barrel shaped drum and combustor nozzles which has an ability of roasting 3kg of coffee beans within 10 minutes of roasting time. With our developed coffee roasting machine, the heating speed of roasting process is very fast, and the roasting of coffee beans can be quickly finished. We experimented the roasting time and compared the results with other coffee roasting machines of the same amount of roasting capacity. The results were outstanding in roasting time and the quality of roasting. In spite of smaller fuel consumption, the roasting time was more shorter than flat cylindrical roasting drum.
이태연,김철호,오재응 대한기계학회 1991 대한기계학회논문집 Vol.15 No.3
본 연구에서는 Wiener 필터링 이론에 의하여 소음원의 입력신호에 대한 최적 한 예측을 할 수 있는 최적예측기(optimal predictor)로써 부가적인 음을 발생시키고 입력신호 및 출력신호 간의 차인 오차를 최소화시키도록 하는 적응신호처리방법에 대 해 설명하고 이러한 적응 신호처리 방법을 이용한 능동 소음 제어 방법을 제시하였다. 이와 아울러 제어계의 환경 변화에 따른 파라메타의 변화에 적응적으로 응답이 가능해 야 하는 적응 소음 제어계에서, 음향궤환과 함께 필히 고려해야하는 부가적인 전달함 수-모델과 스피커를 포함하는 보조경로 및 오차미이크로폰을 포함하는 오차경로의 전 달함수의 영향을 고려한 능동소음제어에 대해 연구하였다.
환경에 대한 태도와 친환경 행동간의 일관성에 대한 연구
이태연 한서대학교 산학협력연구원 부설 환경연구소 2000 환경연구소 논문집 Vol.1 No.-
본 연구는 환경에 대한 태도와 친환경 행동간의 일관성을 중심으로 환경문제의 해결에 심리학의 어떤 도움을 줄 수 있는지를 살펴보았다. 우선 환경에 대한 태도가 어떻게 형성되는지를 행동이론, 인지부조화이론, 기대-가치 이론, 자기지각이론에의 입장에서 설명하였다. 그리고 환경태도는 변화를 통해 친환경 행동을 증가시키려는 시도들도 환경교육, 환경규범, 강화기법 등을 검토하였다. 이러한 시도들이 그다지 성공적이지 못한 원인을 상황적 요인, 측정수준, 귀인 경향서의 측면에서 분석하였다. 마지막으로는 환경태도는 친환경 행동간의 일관성을 높이기 위한 수단으로 태도의 강도, 측정수준의 일치, 공적 개입의 증가, 친환경 자기지가 등을 제안하였다. This study investigated how the psychological approach could help solve environmental problems from the viewpoint of a consistency between environmental attitude and pro-environmental behavior. First of all, I reviewed several psychological theories, such as behavioral theory, cognitive resonance theory, expectancy-value theory, and self-perception theory, as theoretical bases to explain how to form a attitude about environment. I introduced such representative means to increase pro-environmental behavior by a change of attitude about environment as environmental education, environmental norm, and reinforcement technique. I analyzed why such means had came to no good and proposed several reasons on it. Lastly, I discussed how to increase a consistency between environmental attitude and pro-environmental behavior
이태연,신준 한국기계기술학회 2017 한국기계기술학회지 Vol.19 No.5
There is a need for the development of insulation products with excellent insulation performance and durable insulation for building components. Various policies has been trying to improve the energy efficiency of buildings. The development of energy-saving building materials is also evolving as the energy saving of buildings becomes a main trend. In public and commercial buildings, reliability and beauty are emphasized with respect to the safety of buildings. The purpose of this study was to develop a manufacturing equipment and technology for the development of high airtight stainless steel insulation doors that can meet energy saving design standards of buildings.