GIS를 이용한 충주대학교 시설물 관리

신계종,유영걸 충주대학교 산업대학원 2002 大學院論文輯 Vol.3 No.-

According as a complexity and high level of society, the information being rapid and accurate for landuse, environment and traffic etc. is required, but the information management by a drawing and a map is confronted with a complicated and sudden change of facilities. For the facility management, the condition of all facility must be understood and facility drawing of those days of construction must be kept well, but there are many problems for the facility management because of keeping a drawing and a map carelessly up to now. To solve these problems and preserve a drawing and manage facility efficiently, the facility management(FM) is required. This study includes the methodological problems for the techniques and procedures to design database necessitating great cost and time to establish the facility management system(FMS). Furthermore, all sorts of layout materials, which are currently handled in facility management within the universities land, can be expediently utilized through computerization of GIS, and this study readily tries to determine the scheme to modify, complement, and manage the data.

사례기반 추론을 이용한 지능형 판매 에이전트에서의 유사도 계산

成百均 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

This paper describes the similarity measure on intelligent sales agent using CBR(case-based reasoning). First, After briefly surveying to intelligent agents and case based reasoning, We present the multi-agent system which is composed of Information Collection Agent, Index Agent, User Interface Agent, Search Engine and Sales Engine. Especially, the design of Sales Agent using CBR makes it possible to propose a new cycle of CBR and a method of computing similarity. And We then propose a method of similarity measure which can effectively search the case bases. The proposed system comes to have more learning according as the increase of new cases are added to Case Base and the number of success cases of the existing cases gradually increases, and recommends proper goods matching various tastes of customers. In the future, the study of Data-mining Technique will help the system develop into a useful agent which can adapt itself to many kinds of users.

전원선을 이용한 정보 전송 시스템의 설계에 관한 연구

柳然國,李性燦,崔珍根 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

The design of serial communication system over the power lines are discussed. using ac power lines to transmit data eliminates the cost of installing special wiring between distributed system elements. In order to do this, used a frequency modulation technique called frequency shift keying(FSK). The main building blocks that I sued in the design of the system was the voltage controlled oscillator, phase-locked loop, band pass filter and the signal superimposing circuit. The research yielded a design for a serial communication system with 1200[bps], and this procedure is presented with experimental measureme.

다공성 폴리스티렌-디비닐벤젠 마이크로겔의 겔 침투 크로마토그래피 분리효과

李榮雨,文榮柱 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

Monodisperse sized and spherical polystyrene seeds were prepared by batch emulsion polymerization. Copolymerization of 60 mol% divinylbenzene and styrene, within swelled polystyrene seeds were carried out to produce of uniform, crosslinked and porous poly(styrene-divinylbenzene) microgels. The particle size and particle shape of polystyrene seeds and poly(styrene-divinylbenzene) microgels were measured by using the scanning electron microscope. The size of poly(styrene-divinylbenzene) microgels varied from 2 to 8㎛(PSDB1, PSDB2, PSDB3, PSDB4) as the size of polystyrene seeds, which is from 1.0 to 4.5㎛(S1, S2, S3, S4). The gel permeation chromatograph column was packed with the PSDB microgels, we determined the height equivalent to a theoretical plate, and we obtained calibration curve of the column by using standard polystyrene. The number of theoretical plate of the column showed the follow order with the ranges from 105 to 1449 for propylbenzene of 10%(W/W); PSDB3 > PSDB1 > PSDB4 > PSDB2. PSDB1 showed the highest column efficiencies for the separation of polystyrene standard materials.

자성유체 액주의 동적 특성에 관한 실험적 연구

金鍾喆,李洪西,黃勝湜 충주대학교 산업대학원 1999 大學院論文輯 Vol.1 No.-

The aim of the this study is to provide fundamental informations for the development of magneticfluid actuator. To achieve the aim, the dynamic characteristics of magneticfluid are investigated by experiment for the various of tube diameter, height and position of magneticfluid column in magneticfluid according to supply voltage of solenoid coil. From the study, Actuating force of magneticfluid is generated by magneticfield. The magnitude of force increases as the intensity of magneticfield becomes strong and the center of magneticfield becomes lower than the center of magneticfluid column. And, the force of magneticfluid relates to the volume of magneticfluid more than the height and diameter. The response delay time decreases as the height of magneticfluid column becomes longer and the center of magneticfield becomes lower than the center of magneticfluid column. But, the approaching time increase as supply voltage becomes higher and the center of magneticfield becomes higher than the center of magneticfluid column.

얇은 圓筒部材의 압괴에 關한 硏究

安大植,金虎先 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

The crushing conduct of Aluminum cylindrical members showed axisymmetic mode in case of thin non-axisymmetic mode in thick board. Mixed collapse mode also appeared. When crushing, half wave length reacted more sensitively to the change of thickness rather than that of diameter. Comparing the maximum bucking load of square section tube and single-hatted section tube, both have the same section area, I came to know that square section tube appeared to be fittest for the structural vehicle members. And Aluminum cylindrical structural members and single-hatted section tube were following in order. As a result, Aluminum cylindrical members appeared to be fit for the structural vehicle members. And in Nodal number, it showed the diverging point between axisymmetric mode and non-axiymmeric mode. When the critical value of thickness/ diameter ratio is between 0.047 it showed to be fittest in the relation of the critical value of thickness/diameter ratio the maximum buckling load and the amount of absorbing energy.

차체부재의 구조개선에 관한 연구

안대식,민병국 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

For making economical and practical automotive, there are lots of research related to lightening the weight and more safety chassis. In the case of the single hatted-section tube specimen being used as the most vehicle structural member, at the moment of vehicle crush, the passenger will be in front of severe danger by the buckling of chassis. To avoid the buckling by first collision load and make the chassis have more power by absorbing the collision energy, the structure of chassis changed so that when crash occur, the chassis got a tensile force instead of compressive force. The result of experiments are 1. The load and displacement curve show that the first stage impact load in the direction of column can be reduced perfectly. 2. At compression, the absorbing energy quantity and the maximum buckling load are safety to each other. As a results of that relation, with the maximum buckling load can predict the absorbing energy quantity. The critical value of the thickness-width ratio is useful for predicting the compact mode but no good for predicting the absorbing energy quantity. 3. When the thickness of material is constant, the little cross sectional area which means that the critical value of the thickness-width ratio is bigger and which show good ability of the absorbing energy quantity. In all different size of materials, the tensile absorbing energy quantity is about 80-90% of the compression absorbing energy quantity. 4. The best recommended thickness of material is 1.0 ㎜ thickness and 50×50㎜, considering the material weight and the absorbing energy quantity.

N형 Bi_2Te_2.4Se_0.6 박막의 열전 특성

金逸昊 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

Thin films of n-type Bi_2Te_2.4Se_0.6 thermoelectric materials were deposited by the flash evaporation technique, and their properties were investigated. The effective mean free path model was adopted to examine the thickness effect on the thermoelectric properties. Annealing effects on the carrier concentration and mobility were also studied, and their variations were analyzed in conjunction with antisite defects. Seebeck coefficient and electrical resistivity versus inverse thickness showed a linear relationship, and the effective mean free path was found to be 5120Å. No phase transformation and composition change were observed after annealing treatment, but carrier mobility was increased due to grain growth. Carrier concentration was decreased considerably due to grain growth. Carrier concentration was decreased considerably due to reduction of antisite defects, so that electrical conductivity was decreased and Seebeck coefficient was increased. When annealed at 473K for 1 hour, Seebeck coefficient and electrical conductivity were -200㎶/K and 510Ω^-1㎝^-1, respectively. Therefore, the thermoelectric quality factor were also enhanced to be 20㎼/㎝·K^2.

용존산소 농도 모의시 VARMA(상태공간) 모형과 승법ARIMA모형의 특성비교

李雄洙,尹海賢 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

The purpose of this research is to develop the stochastic water quality model for the intaking station of Chung-Ju city waterworks in the Han river water system. The changes of water quality are simulated by the theory of Box-Jenkins Multiplicative ARIMA(Autoregressive Integrated Moving Average, univariate time series model) and VARMA model(Vector Autoregressive Moving Average; multiple time series model). This model followed the typical procedures of the Box-Jenkins method including identification, estimation, and diagnostic check. The factors of water quality used in these models are water temperature and dissolved oxygen(DO). The models development were based on the data obtained from Jan. 1990 to Dec. 1997 and compared the prediction ability of both models from observed results in DO simulation. From the computed autocorrelation function(ACF) and partial autocorrelation function(PACF), it is determined that models should have two autoregressive(AR) parameter and one moving average(MA) parameter, and one seasonal AR parameter and one seasonal MA parameter. The seasonal fluctuation of DO and water temperature data to formulate for the Multiplicative ARIMA and VARMA model is evident and period revealed at twelve months. Both models are formulated as ARIMA(2,1,1)(1,1,1)_12 and VARMA(2,2) model for DO and water temperature. The models were validated by estimating ACF and PACF of residuals. The prediction ability of Multiplicative ARIMA and VARMA model are tested using the data collected from Jan. 1988 to Oct. 1999. There are good agreement between the model predictions and the field measurements. From the comparison of both models in DO simulation, the result reveal that VARMA model lead to improved accuracy.

해체비평에 대한 고찰 : Derrida를 중심으로

朴炳珠 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-

The purpose of this study is to understand Deconstructive Criticism and to identify the value of the critical theory. In this study Deconstructive Criticism was treated as a mode of reading. According to Saussure's language theory, a language is conceived as a system of difference. This view is a powerful critique of logocentrism. Nevertheless, there is an affirmation of logocentrism in Saussure's argument. A theory based on difference does not escape logocentrism but finds itself appealing to presence. Deconstruction is not a theory that defines meaning in order to tell you how to find it. It cannot be content with the pragmatic conception of truth. It differs from pragmatism in its attitude toward a reflexive inquiry. First of all, a deconstructive reading identifies a paradoxical situation. Therefore, it never, be definition, yield a coherent theory. As it denies logocentrism, it seeks to produce reversals and displacement. The result of this study shows us the conclusion that text should be interpreted not in terms of absolute truth but with acceptance of a necessary relativity in our critical propositions.