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심재영,진익수 慶南大學校 附設 工業技術硏究所 2003 硏究論文集 Vol.21 No.1
본 논문에서는 동기식 CDMA이동통신에서 매 프레임마다 다른 전송속도로 전송된 신호를 디코딩 할 때, 반복전송된 신호를 누산기를 통하여 더할 경우, 필연적으로 발생하는 스케일링과정을 SMT라는 룩업테이블을 이용하지 않고 직접 스케일링하는 알고리듬을 제안하였다. 이 두 방식을 AWGN 채널과 레일리 패이딩 채널에 각각 적용시켜 보았을 때 BER 및 FER 성능을 모의실험을 통하여 확인하였다. 모의실험 결과 기존의 방식에 비해 제안된 방식이 H/W 복잡도는 오히려 감소하면서 0.3∼0.8㏈ 정도의 성능 이득을 가지는 것을 확인하였다. In this paper, we proposed a direct scaling method replacing the traditional look-up table method using SMT(Symbol Metric Table) when the transmitted signals having the difference data rate for every frame are summed by the accumulator, and decoded by the decoder in synchronous CDMA mobile communications. BER and PER is calculated, as a performance measure, by the simulations for the performance comparisons of two methods over the AWGN and Rayleigh fading channels, respectively. Simulation results show that the proposed direct method obtains performance gains about 0.3∼0.8㏈ over the traditional, look-up table method. Moreover, it is shown that the H/W complexity is rather reduced in spite of the performance gains.
대장 상피종양에서 Cathepsin B, H, L 발현의 의의
심재영,이미자,기근홍 대한병리학회 2009 Journal of Pathology and Translational Medicine Vol.43 No.5
Background : Cathepsin is associated with tumorigenesis, tumor invasion and metastasis through its ability to induce degradation of extracellular matrix components. Methods : To investigate the correlation between cathepsin expression and tumor progression, invasion depth or nodal metastasis, immunohistochemical staining for cathepsins B, H and L were done on 20 hyperplastic polyps, 48 adenomas, and 67 adenocarcinomas of the colon. Evaluation of the expression of cathepsins B, H and L was based on the percentage of neoplastic cells that stained positive for any given cathepsin. Results : Cathepsin B expression was significantly higher in adenocarcinomas than adenomas (29.33 vs 5.48%), but was not associated with the degree of differentiation, depth of invasion and nodal status of the tumors. Expression of cathepsins H and L was absent or low in both adenomas and adenocarcinomas. Conclusions : We suggest that cathepsin B is involved in progression of a subset of colonic adenomas, while cathepsins H and L are not.
심재영,엄애선,이헌옥 漢陽大學校 韓國生活科學硏究所 2002 韓國 生活 科學 硏究 Vol.- No.20
This study was conducted to investigate the sanitary management proceedings of the industry foodservice in Seoul area. Total 247 foodservice managers participated a survey and 159 participants among them were selected for analysis. Topics investigated include time-temperature and other sanitation, personal sanitation, and equipment-facilities sanitation. Foodservice managers responded were 27.3 years in average age and 2.4 years in duration of employment. 36.5% of participants employed service work and they mainly concerned sanitation within foodservice as a critical point (49.7%). Total mean score of sanitary management proceedings on HACCP was evaluated by 5-point scale. Time-temperature/etc. fall 3.91 out of 5.00, personal sanitation 4.02 out of 5.00 and equipment and facilities sanitation 3.85 out of 5.00. Of sanitary management proceedings, the 30-34 year old group had high score in time-temperature/etc. and equipment and facilities sanitation & the 25-29 year old group in personal sanitation, compared to other age groups. However, both were not significant(p>0.05). 95.6% of foodservice managers had sanitation checklist, and sanitary management proceedings were significantly(p<0.05) higher in personal sanitation than the group without checklist.