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On Some Common Fixed Point Theorems in Probabilistic Metric Spaces
노상태 한국수학교육학회 1985 수학교육 Vol.23 No.2
In this paper we obtain several results on the existence of common fixed points of commuting mappings on PM-spaces and give an application. Our results generalize a multitude of fixed point theorems in PM-spaces.
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초고층 커튼월 외피 열성능해석 프로그램 개발에 관한 연구
노상태,김강수,정진세 대한설비공학회 2007 설비공학 논문집 Vol.19 No.1
The purpose of this study is to develop an user-friendly computer program which can analyze the thermal performance of high-rise curtain wall. In this study, the sub-routines for FVM SOLVER, HIGH-RISE CONDITION CALCULATION, AUTOMATIC SPECIFICATION BOUNDARY/MESH, MATERIAL DATABASE, and GRAPHICAL CONDENSATION/U-FACTOR OUTPUT were developed by using Visual Basic. The curtain wall heat conduction simulation results of program showed good agreement with those of FLUENT and THERM. The minimum and maximum relative error rates were 3.17 and 9.68% compared to other software.
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농촌 주거용 3kW급 태양광 발전 시스템 및 경제성 평가에 관한 연구
노상태,김재엽 대한건축학회지회연합회 2015 대한건축학회연합논문집 Vol.17 No.5
본 논문에서는 신재생에너지 중에서 농촌 주거지역을 위한 소규모 태양광발전설비에 대하여 그 보급현황 및 관련 기자재정보의 데이터베이스를 구축하고, 현재가치법을 이용한 태양광발전설비의 투자비회수기간 등 경제성을 분석, 평가해보고자 한다. 소규모 태양광발전실비의 보급현황 조사를 위해 충청북도 C시 지역의 3kW급 소형 태양광 발전설비의 설치사례와 보급현황을 파악하였고, 관련 산업 업체 문의와 견적요청을 통해 업체별 태양광 셀의 제품사양과 태양광 발전설비 설치시의 비용구조를 파악하였다. 아울러 경제성 평가를 위해 일본의 JIS C 8907 ‘태양광 발전 시스템의 발전량 추정 방법’을 이용하여 월별 예측 발전량을 산출하였다. 이 후 조사된 비용 구조에서 파악한 태양광 발전설비 설치시스템의 초기투자비용과, C시의 가구당 평균 전기사용량 데이터, 예측된 발전량 값을 이용하여 산출한 전기요금을 바탕으로 현재가치법 분석을 통해 경제성 분석(투자비 회수기간 산출)을 실시하였다. Photovoltaic systems is a very useful renewable energy production system for rural housing because of its system simplicity. But many people of rural area hesitate impose photovoltaic system because photovoltaic system requires much initial money. In this paper, to verify accuracy of prediction algorithm, JIS 8907 for photovoltaic electricity generation, we collected electricity generation data of many rural housings, and compared actual generation data to predicted data from JIS 8907. Also we analyzed the economic feasibility of photovoltaic energy for small-scale solar power plants for rural residential areas, and payback period of solar power plants using departmentalized initial cost category such as panels, inverters, support fixtures, and installation labors, considering government subsidies. Payback period of investment of 3kW-class photovoltaic system in previous studies was more than 10 years. As a result of grasping the payback period of investment with present value method of this study was 7 years, it was found that the increase or decrease in the average house power consumption gives the greatest effect.
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수직 밀폐형 지중열 교환기 설계 조건에 대한 천공 깊이 변화에 관한 연구
노상태 대한건축학회지회연합회 2014 대한건축학회연합논문집 Vol.16 No.1
전 세계적으로 화석에너지가 고갈되어가고 있으며 1997년 교토의정서가 발효되고, 건물에너지 효율등급, 에너지소비 총량제 등의 정부정책이 시행됨에 따라 신재생에너지 설치가 중요시 되고 있다. 본 연구에서는 국내의 지역별 지열 도입현황을 파악하고, 신재생에너지중 지열의 핵심 요소인 지중열 교환기, 그 중에서도 현재 건축물에 가장 많이 사용되고 있는 수직밀폐형 지중열 교환기의 여러 설계 변수와 보어홀(천공) 깊이 간 상관관계를 파악하고자 한다. 본 연구에서는 GLHEPRO와 EnergyPlus를 이용해 지중열교환기의 여러 설계 변수를 적용하여 길이의 변화와 최대에너지 생산량의 변화를 고찰하였으며, 지중열교환기의 길이에 가장 큰 영향을 미치는 변수로는 파이프 관경, 파이프와 보어홀벽과의 간격, 지중열전도도를 들 수 있으며, 이 변수 들은 최대 냉난방에너지 생산량에도 타 변수에 비해 큰 영향을 미쳤다.
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단방향 개구부의 형태와 위치에 따른 자연환기 특성에 관한 연구
노상태,김강수 대한건축학회 2005 대한건축학회논문집 Vol.21 No.8
The natural ventilation can reduce 40% energy of buildings relative to mechanical ventilation system. The driving forces for natural ventilation are wind and buoyancy. And these forces have an effect on the characteristics of openings of rooms. The horizontal exterior wind to the room was assumed as wind force. This study evaluated the characteristics of airflow through single-sided openings with variable position and geometry by using CFD. The effectively expanded domain model for CFD analysis was proposed to calculate the effect of outdoor wind. The airflow rate of 3 types of single window position(lower, middle, upper window) and 1 type of the upper and lower window(0.7m vertical distance between the upper and lower window) were investigated. In buoyancy driven flow, the airflow rate of the upper and lower window was much bigger than that of single window, and the airflow rate of the single window was not enough. In wind driven flow, the airflow rate of the upper and lower window was about 2 times bigger than that of single window.
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노상태 한국교통대학교 2014 한국교통대학교 논문집 Vol.49 No.-
The EIFS(External Insulation Facade System) is very a useful and powerful item to reduce thermal load of buildings because the EIFS can protect outside heat and conserve inside heat. The EIFS will be mandatory sooner or later because Korean building energy efficiency regulation will require more high thermal performance of building. But EIFS still has some problems such as detachment, deformation, lack of building standards, and performance verification, etc. So, in this study, we examined regulations and standards on the EIFS and measured actual thermal performance of the EIFS using heat flux sensors. The measured heat flux data converted to U-value and it was compared to designed U-value.
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노상태,채용권,이고은,김미선,남옥형,이효설,최성철 대한소아치과학회 2023 大韓小兒齒科學會誌 Vol.50 No.3
Objective: This study aimed to evaluate the suitability of polydeoxyribonucleotides (PDRN) as a storage medium for avulsed teeth. Materials and Methods: The viability of human periodontal ligament (PDL) cells stored in Hank’s balanced salt solution and PDRN solutions (concentrations, 10, 25, 50, and 100 μg/mL) and tap water was measured using the Cell Counting Kit-8 and Live/Dead assays. In addition, Nitric oxide detection and quantitative real-time polymerase chain reaction (qRT-PCR) were performed to evaluate the anti-inflammatory effect of PDRN. Results: The viability of PDL cells stored in a 100 μg/mL PDRN solution was significantly higher than that of cells stored in the other solutions (p < 0.01). Furthermore, cells stored in 100 μg/mL PDRN solution demonstrated a significantly reduced NO production (p < 0.0001), and cells stored in 50 and 100 μg/mL PDRN solutions expressed significantly lower levels of tumor necrosis factor α, interleukin (IL) -4, IL-6, and IL-10 (p < 0.01) compared to cells stored in HBSS. Conclusion: The PDRN solution exhibited cell-preserving and anti-inflammatory effects on the PDL cells. The findings of this study can serve as a basis for further experiments directed at the development of an effective storage medium for avulsed teeth.
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