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金乙鏞 大田開放大學 1985 論文集 Vol.3 No.-
Reverberation gives two difference in transmission of the sound. In case of increasing of that room time in the room, the sound level of that room increases, and In case of low sound level, percentage syllable asticulation can be supplemented. But in case of its inadequate control, it may be the cause of injurious noise as doubleacting over following sound. On the whole reverberation is in proportion to the absorption - meter sabine of the room reverberation attribute is that optimum rever beration can be modulated by controlling the quantity of absorbers and its acting place the purpose of this thesis exist In representing a course of the plan in reverberation for establishing acoustical design in room.
金乙鏞,尹勝照 大田工業大學 1988 한밭대학교 논문집 Vol.5 No.2
There are tendencies to design and analyze the reinforced concrete structures by the inelastic theory, because the elastic theory has limitations to explain realistic behaviors of the reinforced concrete. This study is aimed to knowing the relationships of load - deflection and rotation of reinforced concrete simple beam. The test considers that the influence of the depth of beam and the amount of reinforcement on deflection behavior of beam. From this study, results are as follows ; 1) The amount of compression reinforcement mainly affects on the slope in descending portion after peak load of the relationships load and deflection. 2) The net tension reinforcement ratio significantly effects the maximum moment and center rotation of flexural members. In case of the net tension reinforcement ratio is same, the maximum moment is Increase with decreasing depth of beam. 3) According to the decreasing net tension reinforcement ratio, the relative rotation of flexural member is decrease. Finally, the deflection of doubly reinforced beam can be diminished more greatly than singly reinforced beam.
VE技法을 活用한 放射線 차폐 콘크리트용 代替骨材의 Cost Down에 관한 實驗硏究 : A Case Study on Atomic power plants
金旬喆,金乙鏞 大田工業大學 1991 한밭대학교 논문집 Vol.8 No.2
This study is aimed to analyze the applicability of VE (value engineering) method for the substitute natural as the magnetite aggregate in high concrete. Results of this experiment, the value factor with using natural aggregate is 61.74% higher then that of magnetite aggregate.