촬영조건 및 전처리에 따른 UAV기반 정사영상 및 DSM의 품질평가

염승훈, 최재완 충북대학교 건설기술연구소 2018 建設技術論文集 Vol.37 No.2

본문 참조

建築設備시스템 更新 評價基準 設定에 관한 硏究

장승재,김동완 신라대학교 자연과학연구소 1999 自然科學論文集 Vol.7 No.-

Nowadays, it is common and will be more often trend toward building and building equipment system to be reinstalled newly because of low of utility value as to deterioration and obsolescence. Building equipment system which is used for the amenity of indoor environment is composed of various components and their assemblies, and that is cause of not only renewed installation but also cost for solving them. It is shown as confused making-decision processes when the renewed equipment scheme of building proceeds. So, it is necessary and useful to evaluate them closely. therefore, this study is aimed to set renewal evaluation criteria of each sub equipment system for corrected renewal evaluation.

空調設備 冷熱原시스템 更新에서 最適 代案시스템 選定을 위한 評價 硏究

장승재,김동완 신라대학교 자연과학연구소 1999 自然科學論文集 Vol.6 No.-

The renewal for the primary cooling system of existing office building requires to consider many factors such as life cycle cost factor, resource use factor, functional factor, indoor quality factor, architectural quality factor and environmental factor. However the current renewal method mostly considers only the simple economic factor even not taking into account the life cycle of the equipment. And, therefore, it could not evaluate the integrated performance of various optional renewal cases. The purpose of this paper is to introduce a statistical method - AHP(analytic hierarchy process) and to evaluate three optional cooling renewal cases such as turbo compression type, thermal storage type and absorption type for office building.

이중관 기포탑에서의 비뉴튼류의 기-액간 물질이동

한승환,김상렬,최재욱,최일곤 東亞大學校 1991 東亞論叢 Vol.28 No.1

The effect of draught tube dimension, properties of CMC aqueous solution and gas velocity on the gas holdup, ??, and the volumetric liquidphase masstransfer coefficient, ??, in a bubble column with draught tube were measured in highly viscous-pseudo plastic carboxymethylcellulose aqueous solution. The results were as follows : 1. ?? and ?? increase with increasing gas velocity and decrease with increasing concentration of CMC aqueous solution. 2. ?? and ?? increase with being enlarged diameter ratio of draught tube but specially ?? decreases to some degree in the CMC concentration of 0.05∼0.7wt%. 3. Correlations among various parameters having an influence on ?? and ?? were expressed by Eq. (16) and Eq. (17), respectively. ??

강의 현대화 추진 및 활용방안 연구

구경완,이근복,장종국,김재홍,김영환,최제영,이승훈 永同大學校 1997 硏究論叢 Vol.3 No.1

본 연구는 각종 첨단 기자재를 활용한 강의 현대화 방안을 모색함으로서 공학교육의 효율성을 도모하고 학생들의 학습동기를 유발하여 창조적 능력을 갖츤 전문기술 인력을 양성하는 데 도움을 주고자 하는 것이다. 이를 위하여 현행 공학교육의 현황과 문제점을 분석하고 강의 현대화 사례를 조사하여 본 연구의 기초자료로 삼고자 하였으며, 학부·전공별 강의 현대화 추진 실태분석 및 개선방안을 모색한 후 이상의 연구결과를 종합하여 향후의 강의 형대화 추진방향을 걸정하였다. This study aims to help bring up the well-skilled and creative engineers by searching the modernization of education using various high technology facilities. For this, we analyzed the general condition and problems of current engineering education and surveyed the case study of the modernization of education as basic study. After analyzing the existing situation of promotion searching the proper improvement methods of it, we proposed the new direction of the modernization of education from now on.

생리 활성 세라믹 분말이 첨가된 포장용 LDPE 필름의 새로운 에틸렌 평형 용해 모델

류동완,정재철,심승우,박찬영 전남대학교 촉매연구소 2000 觸媒硏究 論文集 Vol.21 No.-

This work investigates a new model that predicts the equilibrium solubility of gaseous component with polymer film. The new model regards the gas concentration in fluid phase as depressing factor in desorption from the surface of the film. The final mathematical form describes actual observation well with its second order form. The over all figure of the equilibrium solubility is sigmoid that one sees frequently in experiments. The only disadvantage of this model is the bulk concentration appears in denominator that induces the expression becomes infinite if the concentration is none. Insertion of one constant added to the concentration term in the denominator defeats this shortcoming. The following is the mathmatical form of the net rate of dissolution and the equilibrium solubility, respectively. □ Also, this paper presents the logical method obtaining the parameters from the experimental equilibrium data for the ethylene dissolution in LDPE film that had incorporated a ceramic powder with selective gas permeability. Finally, the dependency of the equilibrium parameters, KA, Cmax, the others to the weight fraction of the powder and appears to be linear and presented to follow : The parameters were calculated by soluble equilibrium constant, KA, maximum soluble concentration, Cmax and soluble rate constant, k+ for ethylene gas permeated through LDPE packaging films containing the ceramic powders 0∼6wt% at 20℃, the above model being applied. The values showed 1.45×106∼3.70×106[(㎤/mol)2], 2.30×10-3~2.92×10-3 [mo1/㎠sec]and 0.273∼0.405[㎤/mol sec], respectively.

하악골 전돌증 환자에서 양악 수술과 하악 단독 수술의술 후 안정성에 관한 연구

박재완,이은택,민승기,이동근 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.5

Le-Fort I Osteotomy is considered by many surgeons to be a safe and predictable method for correcting various dentofacial deformities. However, there are controversial options concerning the stability of two-jaw surgery (Le-Fort I osteotomy and sagittal split ramus osteotomy) compared to single mandibular surgery (sagittal split ramus osteotomy). The purpose of this study was to evaluate the post-operative stability of mandible in two-jaw surgery and single mandibular surgery, to help the establishment of accurate treatment planning in patients with a skeletal class Ⅲ malocclusion. There were 15 patients who had been undergone two-jaw surgery and 20 patients who had been undergone single mandibular surgery. Lateral cephalograms of these 2groups ; Preoperation and immediate post-operation, postoperatively 1month, postoperatively 3months, at the latest follow up(>6months) ; were analyzed by linear measurement to evaluate changes in position (hard tissue B, Pogonion point) and compare repapse both group. The results obtained were as follows ; In view of B-point, the horizontal repapse rate of single mandibular surgery was 10.17% at post-op 1month, 12.52% at post-op 3months, 13.01% at post-op 6months and two-jaw surgery was 10.23% at post-op 1month, 11.84% at post-op 3months, 12.97% at post-op 1month, 11.33% at post-op 3months, 12.01% at post-op 6months in two-jaw surgery. In terms of vertical relapse rate, rates of B point were 22.96% at post-op 1month, 28.30% at post-op 3months, 29.56% at post-op 6months in single mandibular surgery and 21.14% at post-op 1month, 25.45% at post-op 3months, 28.86% at post-op 6months in two-jaw surgery. Those of Pogonion point were 26.63% at post-op 1month, 28.40% at post-op 3months, 29.29% at post-op 6months in single mandibular surgery and 20.20% at post-op 1month, 25.44% at post-op 3months, 27.68% at post-op 6months in two-jaw surgery. There were no statistical difference between single mandibular surgery and two-jaw surgery in mandibular stability.

초고층아파트의 거주특성에 관한 연구 : focused on the somparative amalysis of high-rise apartment in pusan 고층아파트와 비교분석을 중심으로

장승재,김동완 新羅大學校 1999 論文集 Vol.47 No.-

Super high-rise apartment, being a new housing pattern, have constructed a kind of building that increased in number and elevation, due to such as an economical use of land, a decrement of construction cost, a necessity of reorganization for urban district, a new urban life cycle of residents. Therefore, this study is aimed at investigating the residential character, and analysed the safety of residence, resident's satisfaction, and psychological behavior to compare super high-rise apartment above 20 stories with high-rise apartmenr below 15 stories in Pusan. Compared super high-rise apartments with high-rise apartments, residents in super high-rise apartments have been prefered to the super high-rise apartment and below 10stories, on the other gand, have been dissatisfied with the children's living, psychological stabilities in the safety of residence and psychological behavior aspects. Specially, super high-rise apartments have large problems such as the high possibility of accidents in balcony, the occurrence of wind noese, and the vibraftion of buildings in the safety of residential consciousness aspect.

空氣調和시스템 更新評價를 위한 意思決定方案에 관한 연구

장승재,김동완 신라대학교 자연과학연구소 1998 自然科學論文集 Vol.5 No.-

Recently, renewal requirements resulted from obsolescence and deterioration of buildings and mechanical systems show a tendency to increase. On this point of view, the purpose of this study is to establish theoretical evaluation methodology of renewal plan of building HVAC system, such as renewal acceptance or rejection, renewal cost, renewal priority order. Failure rate, operating inferiority, adverse minimum and urgency rating were selected and used for evaluation factors of AHP(Analytic Hierarchy Process) which used in this study. Renewal evaluation by AHP will be come into provide successful methods to plan economical maintenance and renewal scheme.

진동 파ㆍ분쇄기를 이용한 고품질 순환골재 생산기술의 개발에 관한 연구

박승완,조현대,김성수,김성수 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1

Skyscrapers and mass housings which built in the time of high economic growth since economic development are renovated as deterioration. And amounts of construction wastes are increasing constantly by demanding new constructions to supply mass housing as well. Hereupon, but construction wastes are being recycled more than 80%, recycle is not enough by the problems on quality of aggregates or user's miss understanding. Due to absent from a core technology, vibrate crusher, or other technology in middle treatment process, people are using inefficient equipments. This caused energy waste, producing efficiency decrease, a falling off in quality and production cost rising etc. Therefore, a purpose on this project is to reduce in a social, environmental and technical charge, and improve a producing technology of high quality cycle aggregates with economical efficiency, productivity and environmental effect from middle treatment process.