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전치 신호처리를 통한 평판에서의 다중 충격의 위치 추적에 관한 연구
문유성(Moon, Yoo-Sung),박홍석(Park, Hong-Sug),이상권(Lee, Sang-Kwon),신기홍(Shin, Ki-Hong),이영섭(Lee, Yung-Sup) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.3
This paper presents the novel work for source localization of serial multiple impacts in a plate sructure. It is difficult to identify the source of serial multiple impacts with the current source localization techenology(SLT) because of the overlapping of dispersive wave induced by multiple impacts and the reflaction from the edge of the plate. In this paper, the new method is suggested for source localization. The method is developed based on the SLT with pre-signal processing such as some limitation for the selection of three sensors, the frequency range for TFA and impact time interval. Results from numerical simulation and experiment in isotropic plate structure are presented, which show the capability of the proposed method.
피혁분의 사료화에 관한 연구 3 . 육성비육돈에 대한 피혁분의 적정급여수준 결정을 위한 연구
한인규,유문일,권관,박홍석 ( In K . Han,Moon I . Yoo,K . Kwan,Hon S . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4
A total of 200 three-way crossbreds (Landrace × Duroc × Large White) were employed to investigate the feeding effect of different level (0%, 1%, 2%., 3%) of hydrolyzed leather meal (HLM) and 2% of fortified leather meal (FLM: as shown in Table 3) to growing-finishing swine for a period of 15 weeks. The results obtained are summarized as follows. 1. Nutrients content of HLM was varied by different sources (makers) of HLM. It was found that the HLM used in feeding experiment contained 75. 21% crude protein, 2.72% chromium and 57.86% pepsin digestibility. Analytical data revealed that HLM contained fairly large amount of glycine, proline, alanine, arginine and contained small amount of other essential amino acids such as methionine and lysine. 2. Experimental results on weight Rain and feed efficiency indicated that optimum using level of HLM in swine rations was 1 %, and 2 % in case of FLM. 3. Digestibility and digestible nutrients content of experimental rations were not affected by the levels of HLM used 4. Carcass data showed that thinner backfat and larger loin eye muscle area were obtained by supplement of 1 % HLM. 5. Chromium retention in kidney was the highest among the tissues, and was higher as the level of HLM in swine ration increased. Accumulation of chromium in bone was the lowest. But it seemed that chromium content of tissues and organs except kidney had little connection with feeding levels of HLM. The results from this experiment indicate that HLM can be used as a protein source in properly balanced swine ration at level of 1 %, and 2% in case of FLM.