CRM 아스팔트의 최적 혼합비와 환경친화적 특성

류병로,한양수 한국환경과학회 2001 한국환경과학회지 Vol.10 No.4

The asphalt mixture with CRM(Crumb Rubber Modifier) is known to show a better performance in resisting thermal cracking, fatigue cracking and rutting compared with the conventional mixture. The laboratory tests on the physical characteristics of indirect tensile strength, density, flow and Marshall value of the CRM asphalt were conducted. The test results show that CRM asphalt has better physical characteristics than that of conventional asphalts. And the analysis on the noise reduction effect, penetration capacity from the field test on the national road in Haksan of Chungbuk, and recycling of tire waste were conducted. From this study, the results show that 1% CRM asphalt has higher the noise reduction effect and penetration capacity than those of conventional asphalts. And, optimal contents of crumb rubber modifier in the asphalt binder is one percent. In this case, crumb rubber modifier were used 10 ㎏ to make the asphalt binder of one cubic meter. So it was named as Eco-asphalt.

淺水域에서의 흐름 解析

류병로 大田工業大學 1991 한밭대학교 논문집 Vol.8 No.2

An attempt was made to develop a computer algorithm to discribe circulation phenomena in shallow water flow using the finite element method. Two dimensional Navier-Stocks equation integrated over depth is used as governing equation. The galerkin's finite element method is used as numerical scheme. In the case of time integration, two step Lax-Wen-droff scheme is used to analyze flow patterns. In a number of model test attempt it has been demonstrated that the results calculated by the model are in good agreement with analytical solutions in the case of one-dimensional rectangualr channel where is a known solution available and it was, thus, concluded that the developed model might be adapted to real situation with a certain degree of accuracy. Numerical simulations of velocity components and tide amplitude were applied to Asan estuary, and the results agree closely with the actual data.

QUAL2E Expert System 개발

류병로 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.0201

This study is to develop the QUAL2E Expert System(QES) to determine the optimum reaction parameters of the QUAL2E stream water quality simulation model automatically. The QES model was used the Shuffled Complex Evolution(SCE) Method for optimal search. With the aid of SCE Genetic Algorithm QES model can be automatic determined without human expert’s priori experience and knowledge. To demonstrate the usefulness, the model is applied to the parameter calibration and verification for the stream water quality modeling of Dongchang river. The result shows superior performances, when compared with human made, in the aspects of accuracy and promptitude.

안중하수처리장 최적설계인자 도출을 위한 실험연구

류병로,방기웅,한양수 한밭대학교 산업과학기술연구소 1995 논문집 Vol.3 No.-

The growth of population and industrialization has been increasing the discharge of wastewater and requiring more intensive waste water treatment processes. This study was carried out to determine the optimal design conditions of a sewage treatment plant in the small city of Anjung. Also, we set out to find the operation guide data pertaining to the activated sludge process required by a city of this size. The biological reactors were operated with hydraulic retention times (HRT) of 12hr, 10hr, 8hr, 6hr and 4hr respectively, at the temperature of 20±1℃, using a mixture of raw wastewater. From the result of the experiments, we found that the removal efficiency increased as the F/M ratio decreased. From this conclusion we found that we could get the TBOD removal efficiency above 90% if the F/M ratio was less than 0.23 kg BOD/kg MSLL-day. for the reaction conditions with a hydraulic retention time of 8hrs, the removal efficiencies of BOD, TSS and VSS for sample #3 were 90%, 85% and 82% respectively.

용존산소 농도 모의시 VARMA모형과 승법ARIMA모형의 비교특성

류병로,한양수 大田産業大學校 1999 한밭대학교 논문집 Vol.16 No.1

The purpose of this study is to develope optimizing method about long and short-term water quality to establish state space model for an accurate hydrologic forecasting using discharge data in river basin. Particularly, the paper focuses on application and feed flack interaction with state space model theory and forecasting optimization by assumption of one river basin system. First, for the P value of VAR(P) model to establish state space theory, it used AIC value by time step and VARMA model was established that it was findings to the constituent unit of state space model using canonical correction coefficients. Therefore this paper confirms that state space model is very significant related with optimization factors of VARMA model. Second, using the T-test results of the translation matrix [F] and input matrix [G] estimations of state space model, the value is zero about no significance and obvious state space model were obtained that the decreased parameter numbers were found to [F] and [G] of maximum likelihood function. Third, the results of comparison with computed and observed values in conformity with the rule of state space model showed a good results and the model were exhibited to high forecasting ability of water quality. Fourth, from the simulated results by the state space model, the model are suitable to forecasting the water qualities for similar to simulated and observed results.

전이함수 모형에 의한 용존산소 예측 모형

류병로,한양수,두민호 대한환경공학회 1999 대한환경공학회 학술발표논문집 Vol.1999 No.4

댐건설중 하상작업이 하류 수질에 미치는 영향

류병로,한양수 大田産業大學校 1995 한밭대학교 논문집 Vol.12 No.0202

A suspended solids occured under the dam construction or kinds of works at river bed are important source for downstream water quality. This study was conducted to get the unit load of suspended solid sourced by the works(Coffer dam, mining and seperation of aggregates) of underwater, and to evaluate influences for downstream water quality by them. Actual simulations were applied to the 137kms of Yongdam dam downstream considering the influx of the nine tributury inflows. Several alternative were suggested to reduce the water pollution. From the results, optimal alternative for the controls of pollutant sources was suggested.

광폭하구에서의 오염물질 확신이송 모형 (BAYQUAL) 개발

류병로,한양수,두민호,유병연 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

The objective of this research is to develop the water quality simulation model (BAYQUAL) that deal with the physical and chemical aspects of rate/behavior of pollutants in the bay BAYQUAL is a two dimensional, time-variable finite element water quality model. This modeling system was designed to provide the generality and flexibility necessary for analyzing a verity of water quality problems in a diverse set of water bodies. The algorithm is composed of a hydrodynamic module(BAYQUAL) which solves the equations of motion and continuity, a pollutant dispersion module which solves the dispersion-advection equation. The applicability and feasibility of the model are discussed by applications of the model to the Kwangyang bay of South Coastal Waters of Korea. Based on the field data, the BAYQUAL model was calibrated and verified. The results were in good agreement with measured value within relative error of 3% for COD. Numerical simulations of velocity components and tide amplitude were agreed closely with the actual data.

공업교과 교육학의 개념 구조 탐색을 위한 이론적 접근

류병로 대한공업교육학회 2009 대한공업교육학회지 Vol.34 No.2

The purpose of this study was to propose conceptual Structure of the study of industrial education based on the concepts and characteristics of industrial education. Therefore, the study was conducted through literature research. 1) The characteristic of industrial education in the study was proposed as 'subject for occupational competence in the industrial technology' on the educational purpose. 2) The characteristic of industrial education in the study was proposed as 'subject for practical knowledge in the industrial/engineering technology' on the structure of knowledge. 3) The characteristic of industrial education in the study as was proposed as 'subject for technological problem solving in the system design and engineering context' on the educational methodology 4) The characteristic of industrial education in the study was proposed as 'design, building, testing and troubleshooting' on the educational process. 이 연구는 공업교육학의 학문적 기반이 될 공업교과 교육의 정체성 차원에서 공업교과 교육학의 개념 구조를 제안하기 위하여 수행되었다. 이 연구는 문헌 연구에 바탕을 두고 수행되었다. 이 연구의 결론은 다음과 같다. 첫째, 공업교과 교육의 개념은 기능 기술과 엔지니어링 응용 능력을 가진 공업기술인을 기르기 위하여 공업 기술의 지식체계에 근거한 시스템을 설계하고, 제작하고, 평가하고, 고장해결 하는 일련의 엔지니어링 과정활동에 기초한 실천적 학습 방법을 통하여 창조적 문제해결을 경험하는 교과교육으로 정의 하였다. 둘째, 공업교과 교육의 성격은 교육 목표의 관점에서 직업 능력 교과, 지 식 구조의 관점에서 실천적 지식 교과, 교육 방법의 관점에서 시스템 설계와 엔지니어링 맥락에서의 기술적 문제해결 교과로 제시하였다. 셋째, 공업교과 교육의 개념적 모형은 공업교과 교육의 개념 정의에 따라 교 육의 목적, 내용, 방법을 논리적인 부수 관계로 도식화하고, 이 구조를 바탕으 로 공업교과 교육의 세 가지 성격 요소를 관련지어 나타내었다. 공업교과 교육학 의 이론적 틀은 교과에 대한 내용적, 설명적, 교육적 이해의 관점에서 구조화 하였다.

용존산소농도 예측을 위한 추계학적 다중 입력모형

류병로,한양수,두민호,조성근 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

In the most cases we analyze a single time series without explicitly using information contained in the related time series In many forecasting situations, other events will systematically influence the series to be forecasted(the dependent variables), and therefore, there is need to go beyond a univariate forecasting model. Thus, we must build a forecasting model that incorporates more than one time series and introduces explicitly the dynamic characteristics of the system. Such a model in called a multiple time series model or transfer function model. The purpose of this study is to develop the stochastic stream water quality model of Puyea station in Keum river system. The performance of the multiplicative ARIMA model and the multiple input-single output transfer function model were examined through comparisons between the historical and generated monthly dissolved oxygen series. The result reveal that the multiple input-single output model lead to teh improved accuracy.