환경친화적 주거건축의 사례에 관한 분석적 연구

현택수,이종수 慶一大學校 1999 論文集 Vol.16 No.3

Facing new century, ecological building and urban design is taking larger attention for the maintainance of ecological system, improvement of dwelling condition, and down-pricing,. being boosted by government. Following the trends, the object of this study is providing the standards of ecological housing development and better method of design. The steps this study develop is collecting informations from the examples worldwide, analysing design skills from the sources, and deriving the better method. 1. The characteristics of metropolitan and downtown area are the pursuit of economics by the efficient use of space and the formation of artificial-urban environment. Therefore, the controversial concepts which are nature and art, can be a primary issue of design. 2. A need of a new development to preserve natural environment becomes important in the suburb of metropolitan and small or medium city. The intensive use of pre-developed area as well as the development and the preservation of the natural environment in underdevelopment are important in development design. 3. The exploit design to preserve existing natural environment of rural or country area is needed. Multi-family house with small size and low dense population such as house complex, terrace house and court house are needed to be distributed.

집적화된 실리콘 압력센서의 출력전압 보상파라미터 추출 및 그 특성

이보나,김건년,박효덕,신상모,이경탁,김찬,권혁채,이상조,박현주 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

An integrated silicon pressure sensor has been designed, fabricated and tested. The signal conditioning circuits were designed to include calibration and temperature compensation of output voltage through trimming of diffusion and ion-implanted resistors. Before trimming of resistors, the compensation parameters such as pressure sensitivity, temperature coefficient of pressure sensitivity, temperature coefficient of piezoresistors and pressure sensitivity of piezoresistors were measured. Then offset voltage, span, and temperature coefficients of offset voltage and span were calibrated by trimming of resistors. The measured output voltage met our design specification and simulation value above room temperature. But, the measured output voltage at -30°C deviated from our design specification and simulation value because the offset voltages were found to vary randomly as a function of temperature.

行列多項式 Liapunov 函數 構成에 依한 誘導電動機의 安定度 解析

李鉉雨,黃有燮,李浚析,文在星 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-

非線形 시스템을 나타내는 狀態空間의 動特性 모델로부터, 定常狀態 값들이 알려지면, 行列多項式에 依해, Scalar Type의 Liapunov 函數를 構成하고 이를 誘導電動機의 安定解析에 適用시킨다. 線形 시스템에 對한 Liapunov 函數의 構成法은 잘 알려져 있으나, 非線形 시스템의 Liapunov 函數 構成法은 아직 體系化되어 있지 못하다. 따라서, 本 論文에서는, 從來의 定常狀態 附近에서의 Taylor 展開에 依한 線形化 技法에 依存하지 않고, 非線形性을 나타내는 項을 分離하여, 行列變換시킴으로서, 線形시스템의 Liapunov 函數 構成法을 살리고, 非線形性이 强한 誘導電動機의 狀態空間모델에 適用시켰다. 그 結果, 求해진 安定領域은, 線形化에 依한 것보다는 훨씬 넓은 5次元의 超空間으로 表現되는 誘導電動機의 漸近安定領域이 되었다. In this paper, when the steady state values for multidimensional and nonlinear Dynamic Models of State Space Representations are given, Liapunov functions of scalar types using matrix quadratic polynomials are constructed by Special Matrix Transformation Techniques and are applied to Stability Analysis of Induction Motors. Futhermore, Liapunov function construction precedures for linear systems can be specified in detail. But, unfortunately, for nonlinear systems, there are no the complete construction techniques. In this paper, differently from conventional methods using Linearization obtained from Taylor series expansions about steady state operating points. Linear terms and nonlinear ones are individually seperated, and by special matrix transformation techniques, similiar construction procedurs such as in the cases of linear systems, are introduced, and are applied to Stability Analysis of Induction Motor. The hyperspaces of multidimensional stability region, obtained from these techniques, were larger than the obtained ones from conventional linearlization techniques about equilibrium points and were assured to be Asymptotic Stability Region ensuring the stable operation of Induction Motor.

Control Graph를 이용한 3차원 개인 얼굴모델 생성

이현철,허기택 한국정보전략학회 2002 한국정보전략학회지 Vol.5 No.1

In this paper, we propose a method of generating an arbitrary person's facial model by using one and/or two photographs which take his full face and profile. Making the generated model shows one's features and characteristics adequately, we manage and adjust control graphs on the characteristic part of face. A node in a control graph is a characteristic point on a part of face, and an edge is a segment which connects two points in the same graph. We can make control easily and fast by adjusting nodes and edges on graphs of the interesting parts only, because each part is defined as a separate graph.

오원천의 식물플랑크톤 군집에 대한 연구

주현수,김진,박종천,정원석,송현철,이용탁,이우범 國立麗水大學校 環境問題硏究所 2004 環境硏究論文集 Vol.6 No.-

We carried out a study on phytoplankton community at Owon stream, Jeollabukdo, Korea. The author have examined 83 taxa of the phytoplankton from researched area. These were composed of 5 classes, 11 orders, 21 families, 44 genera, 79 species, and 9 varieties. The composition of occurrence species were as follows: green algae are 48.2%, diatoms are 33.7%, blue green algae are 10.8% and etc(7.3%). Dominant species were Chlamydomonas angulosa, Pandorina morum, Coelastrum microporum, Scenedesmus quadricauda, Staurastrum gracile, Melosira varians, Me. italica, Synedra ulna, Sy. acus, Cocconeis placentula, and Cymbella tumida. The standing crops varied from 1,650cells/ℓ to 47,000cells/ℓ. Phytoplankton density of Owon stream were lower about 8.6 times to a 1,531 times than those of other lakes and rivers in Korea. So, to preserve the water quality in Owon stream we have to manage continuously on the nitrogen and phosphorus.

投資信託會社의 業務領域擴大 方案

吳賢鐸,李憲相,鄭承佑 全北大學校 1992 論文集 Vol.34 No.-

Enlargement of business field is required for the Investment Trust Companies in serious financial trouble to survive. We can think of two basic directions to take which are specialization in the basic investment trust business and acceptance of universalization including the securities business. Considering the current situation of domestic financial industry, a scheme of having a securities company as the mother company while seperating the investment trust business as its subsidiary would be particularly beneficial.

원가 진단을 위한 자원소비변화 지표

홍영탁,유정호,이현수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

In order to prevent cost overrun, it is required to check the cost overrun factors periodically. The purpose of this study is to suggest three indexes that can help diagnosing construction cost. Total construction cost can be decomposed into individual cost items according to resource consumption. Therefore, it is necessary to control resources that may cause cost variance. The three indexes suggested in this paper are variance of total resource input, variance of individual resource input, and variance of resource balance, where the resource input and resource balance are measured as cost.

서울시 일부 대기 중 라돈농도의 분포에 관한 연구

김윤신,이철민,김현탁,이홍석,박태술 한양대학교 환경및산업의학연구소 2000 環境과 産業醫學 Vol.9 No.1

A study of atmospheric radon concentrations survey in Korea, Seoul was carried out with ERM(Electrostatic Radon Monitor) from October 1998 to September 1999. The mean of atmospheric radon concentrations 4.79Bq/㎥ at Seoul. Radon concentration were distributed 3.65-8.71Bq/㎥. The seasonal pattern seems to be relatively higher during the autumn and relatively low during the spring. The result from correlation analysis was significant obtained between atmospheric radon concentrations and meteorological factor.

저장기간에 따른 3개 수종의 종자 및 발아 특성 변화

한심희,김찬수,장석성,이현주,탁우식 한국농림기상학회 2004 한국농림기상학회지 Vol.6 No.3

This study was conducted to examine the changes in the seed physical characters and germinative properties of three tree species at three different storage times in order to determine the most suitable storage time and condition. Seed physical characters and germinative properties were examined from seeds of Fraxinus rhynchophylla, Zanthoxylum schinifolium and Staphylea bumalda that were stored at -18C for 1, 3 and 10 years, and the growth performance and physiological characters of their seedlings were analyzed. Seed physical characters and germinative properties showed significant differences between three storage times as well as three tree species. Seed moisture content of F. rhynchophylla and S. bumalda and seed fresh weight of Z. schinifolium decreased with increase of storage time. Storage time represented negative correlation with moisture content and fresh weight (r = -0.822, p < 0.01). Seed percent germination of Z. schinifolium and S. bumalda stored for 3 and 10 years decreased less than 15% and 10.7% respectively. Mean germination times for seed of F. rhynchophylla, Z. schinifolium and S. bumalda were delayed 11.9, 5.7 and 9.7 days after a storage time of 10 years, respectively. However the growth and viability of seedlings didn't show a special pattern for storage time and tree species.

적절한 용량 이하의 경구용 향응고제 사용 중 발생한 뇌출혈 환자의 임상 양상

조수진,황흥곤,나찬영,이영탁,최현배,조태구 世宗醫學硏究所 2000 世宗醫學 Vol.17 No.2