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This paper discussed on the sruface area of disc and the amount of attached biomass by kinetics cinstant at each stage, for treating sewage with rotating biological contactor (RBC). The results are shown as follows; 1. It was found in all experiment that substrate removal could bo divided into two phase. Over 60% of substratre was removed in the first phase. The first phase consisted of the first stage. The remaining substrate removed in the second phase consisting of the second, third and fourth stages. Since the majority of the substrate was removed in the fitst stage and very little in the remaining stages, reducing the distance between the disc in the second phase was necessary for better efficiency in RBC design. 2. The determined saturation constant (㎏) and area capacity constant (p) for calculation of the surface area of disc were ; 69.0, 70.4 at first stage, 88.0, 74.6 at second stage and 137.0, 82.0 ar third and fourth stages, respectively. 3. Thickness of the attached biomass (film) was between 0.34mm and 3.3mm, and the percentages of contained water in the film was approximately 97%. It was also observed that the maximun value of the dry sludge index (DSI) was almost unchanged beyond the effluent concentration of 60㎎/ℓ.
All singers can often develop voice trouble secondary to vocal abuse and overuse, but it is well known that traditional Korean singer (pansori) develop voice disorders more frequently than western style sunger. While laryngological concern for voice disorders arising in professional singers has received some attention, empirically motivated investigations of the underlying acoustic features of the singing voice have been relatively limited. Since all singers have a good knowledge of the voice and voice training, they would hardly give consent for treatment to a doctor unless he understood their desire to maximize their voice quality. The components of this report are composed of breathing, basic ekement, and vocalization, essencial fact, for getting a perfect voice for pansori. The breathing is based on hypogastric breathing. The main functions of breathing are energy and power of utterence, tempo of rhythm and seperating paragraph and controlling feelings according to dramatic situation. Vocalization is based on general vocalization. Main uses of it are maintaining singer's tone and harmony of cosmetic dual force.