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The first objective is find out some life styles on the aged by the actual condition of the daily living activities in old people's homes and recuperation facilities. The second objective of this study is to clarify the living behavior patterns of the aged who are under recuperation and living by behavioral places. The thorough investigation and observation works were made to them from the view points of daily living behaviors and activities of the recuperating aged. This article discusses about the basic charactersitics of the aged and the actual condition of the daily living activities of the aged in old people's homes and recuperation facilities.
Recently construction industry involves more risks occurred with increasing in size and complexity of construction projects. Risk has been recognized as one of the most serious problems through the construction performance control. Successful performance of construction project depends on managing and estimating of exact construction cost, but most of contractors have failed to systematically identify and evaluate the effect of internal and external risk elements related with construction projects. Also they don't have any methods or procedures to quantify the impact of risk on project time and cost. Therefore this study suggests a contingency estimating model to quantify the risks by using influence diagram, decision tree, and Monte Carlo simulation. The adequacy of proposed model are verified through case study.
This paper presents the results of the load test performed on a PSC bridge and suggests the producer of bridge rating through the load test. In general the girder bridge resist the loads as a complex three-dimensional structural system. Therefore the test results are analyzed for the longitudinal and the transverse response characteristics. The bending moments based on the beam analysis are compared with the measured values for longitudinal response characteristics. The lateral load distribution characteristics are assessed based on the load test results for transverse characteristics. Also the rating fo the test bridge is performed by using the suggested rating procedure which considers the actual response characteristics of the bridge. The suggested procedure can be used for understanding of actual response characteristics and evaluating load carrying capacity of the PSC girder bridge.
This paper present an evaluation of new drilling and blasting method with two different drilling directions for pilot tunnel enlargement using numerical experiment. That is, three dimensional transient dynamic analysis was made to investigate the effect of the ground vibration when blasting was performed at same position using the equivalent single hole charge.
Currently in Korea, the tunnel enlargement process uses the combined method of TBM/NATM with the conventional method. So, it is difficult to get advantages which involved in the combined method. In this study, the new drilling and blasting enlargement excavation method was developed which drills charge holes in a radial direction inside the pilot tunnel. Then holes are drilled in the outer portion of the tunnel section in the same direction as the tunnel axis to prevent overbreak. Next, all charged holes are blasted simultaneously (to be called the "bidirectional method"). This paper presents an evaluation of new drill and method with two different drilling directions for pilot tunnel enlargement through experimental field tests performed on a road tunnel construction site in Seoul area. To evaluate the efficiency of new tunnel enlargement method, field test results were compared with those of conventional drill and blast method.
Since 1997, the Korean Government has increasingly introduced CM(Construction Management) system which is a new project delivery system, with the opening of the construction market. In case of Korea, not only the applicable criterion of CM but also definition of that has not still established. This study aims to minimize trial and error that may occurre when CM is applied to the domestic construction by examining the background and progress of the American CM system. Consequently, in this study, proper method to apply CM to this country is suggested by synthesizing CM business standards of GSA and other organization and analyzing the role and responsibility of CM
Project risk management is a management technique of identifying, analyzing and responding latent risk factors in project life cycle. To date, the importance of risk management has been overlooked in the Korean construction industry. The industry's practice of risk management are limited to and concentrated on the construction stage, which cannot propely assess potential risk factors during the project life cycle. Moreover, the research and systematic development efforts on the subject have been very few in the industry. The Purpose of this study is to improve current construction scheduling practices by providing as probabilistic scheduling model that can be utilized during early construction stage.
In this study, with a purpose to establish the standard construction contract conditions, the FIDIC conditions of contract and ther corresponding legal systems from the various domestic laws and regulations, used as the construction conditions, were compared. The study shows problems such as inconsistence and atypicality between current provisions and FIDIC contract. The possibility of claim occurrence in Korea construction market is significant. Through a comparison of domestic and foreign construction contract, the study presents that domestic contracts don't have provisions about the procedure of submission, engineer's responsibility and authority, and effective procedure of claims. The study also presents techinical considerations under the FIDIC Contract by Employer and Contractor.
A numerical study on the homogeneous jets has remained of requiring more intensive investigation for problems due to the treatments of free surface, Reynolds stress /flux terms in turbulent flow. The verification of predicted results from the numerical study continues to be in the qualitative study, because of the lack of experimental data, due to the difficulties in measuring the turbulent fluctuations in flow. In this study, the computer program of k-ε model being widely used for the simplicity of computation has been developed to compute the characteristics of two-dimensional homogeneous jets with the free surface boundary condition. By comparing these results with Gaussian distribution, it is found that this model can predict fairly well the characteristics of two-dimensional homogeneous jets in the momentum region.
For the development of a good rainfall-runoff model, the estimate of the parameter of Storage-Function Model(SFM) and HEC-1 are compulsory. It is concluded that SFM can consider model for the real-time control of a multi-purpose reservoir in case of storm event on subbasin area. For the parameter of SFM and HEC-1 on 3 watersheds In Hapchen dam. It has been computed to calibrate by the iteration method using the observed data of the storm event and the discharge at 1998 year. The value of the estimated parameter on HEC-1 was analyzed by the linear regression analysis of computed and observed discharge. The results obtained in this paper are summarized as follows; 1) SFM is good for the hydrograph on subbasin in Hapchen dam by the linear regression analysis of computed and observed discharge which has been 8 storm events. 2) The coefficient of determination and standard error of the parameter of SFM are about 0.88∼0.99, 0.16∼5.12. The lag time(TI) and ratio of runoff are about 1∼2hr, 50%. 3) For comparison with the value of the coefficient of determination, HEC-1 is lower then SFM on the peak of computed and observed discharge. 4) The parameter value of K, TI of HEC-1 are about 4.01∼19.13, 5.73∼21.81 in Gechang-Ⅰ, 7.17∼20.82, 7.94∼20.78 in Gechang-Ⅱ, 0.52∼18.34, 4.62∼19.11 in Jisan.