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군견에서 광견병 백신종류에 따른 효과 차이에 관한 연구
주영훈 ( Young-hoon Joo ),황세민 ( Se-min Hwang ),송상헌 ( Sang-hun Song ),홍성휘 ( Sung-hwe Hong ),권태선 ( Tae-sun Kwun ) 국군의무사령부 2013 대한군진의학학술지 Vol.44 No.1
Objectives : Rabies is a contagious disease which can be found in every warm-blooded animal, and be transmitted through bites of infected animals. if a person did not formed antibody, his vulnerability to hydrophobia would increase, therefore, The purposes of this study is to compare effectiveness of live vaccine with those of non-live vaccine. Methods : This study subjects were 20 military working dogs and each ten dogs were injected with live vaccine (Group A) and non-live vaccine (Group B) at the Army Dog Training Center from March 2011 to September 2011. We evaluated blood samples after three months and six months after injection. After separating blood serum from blood samples, we tested them by using enzyme-linked immuno sorbent assay (ELISA) and The fluorescent antibody virus neutralization test (FAVNT). Difference for rate of serum antibody titers by two sorts of vaccine were assessed with Mann-Whitney U test. Results : The antibody titers of ELISA in Groups A and B were 3.727 EU/ml and 0.133 EU/ml on three months after the first dose(titers of effectiveness ≧ 0.51), 2.897 EU/ml and 0.125 EU/ml on six months(titers of effectiveness ≧ 0.448), respectively, Titers of FAVNT in Groups A and B were 6.010 EU/ml and 0.170 EU/ml on three months after the first dose(titers of effectiveness ≧ 0.5), 10.45 EU/ml and 0.500 EU/ml on six months(titers of effectiveness ≧ 0.5). Conclusions : This study suggested both vaccines formed antibodies, but live vaccine showed more rapidly increase rate of serum antibody titers of effectiveness. Moreover, live vaccine's antibodies lasted longer. It seems clear that military contemporary rabies immunization by using live vaccine is more effective than using non-live vaccine in terms of budget and effect.
박정훈(Jeong Hun Park),이정섭(Jung Seob Lee),주영훈(Young Hoon Joo),강현욱(Hyun-Wook Kang),조동우(Dong-Woo Cho) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
For patients with tracheal resection, various composite scaffolds have been developed and applied for tracheal defect repair in animal models. And artificial prostheses consisting of a polypropylene mesh tube reinforced with a polypropylene spiral have been developed and applied clinically. In this study, a novel three-dimensional (3D) bellows scaffold with high flexibility and biodegradability was developed for tracheal reconstruction. And the flexibility of the bellows scaffold against compression was evaluated using finite element method (FEM) simulation. The bellows scaffold was fabricated by indirect micro-stereolithography technology that combines projection based micro-stereolithography and sacrificial molding process using polycaprolactone (PCL).
효율적인 참조 메모리 사용을 위한 블록기반 적응적 비트할당 알고리즘
박시내(Seanae Park),남정학(Jung hak Nam),심동규(Donggy Sim),주영훈(Young Hun Joo),김용석(Yong Serk Kim),김현문(Hyun Mun Kim) 대한전자공학회 2009 電子工學會論文誌-SP (Signal processing) Vol.46 No.3
본 논문에서는 비디오 부호화기와 복호화기의 참조 영상 버퍼와 메모리 대역폭을 효과적으로 줄이는 방법을 제안한다. 일반적인 비디오 코덱에서 코딩의 효율을 높이기 위하여 이전 프레임들을 참조하는 방법을 많이 사용하는데, 최근에는 메모리 사용 및 메모리와 프로세서 간의 데이터 대역폭의 효율을 높이기 위하여 참조 프레임을 압축하여 저장하는 방법이 연구되고 있다. 이방법은 이미 압축 및 복원 과정을 통해 열화가 생긴 참조 영상에 대하여 재 압축을 실행하고, 또 기존의 압축 코덱 내부에 부호화기와 복호화기가 추가되는 경우이기 때문에, 화질의 열화를 최소화 하면서 복잡도가 낮은 코덱이 요구된다. 이에 관련된 대부분의 연구는 화질의 열화를 최소화하면서 효과적인 재압축을 할 수 있는 방향으로 진행되며, 보통 양자화를 위해 고정길이 비트할당 방법을 사용한다. 본 논문에서는 영상의 특성을 고려한 적응적 블록단위 최대-최소 양자화를 통해 복잡도가 낮으면서 화질의 열화를 최소화 한 방법을 제안한다. 제안한 방법에서는 8x8 크기의 블록을 기본 처리 단위로 하여 메모리 접근성을 용이하게 하면서, 8x8 블록 내부의 4x4 블록 단위로 적응적인 양자화를 적용한다. 실험결과 기존의 고정길이 비트 할당을 통한 재 압축 방법에 대하여 BD-bitrate 관점에서 평균 1.7%, BD-PSNR 관점에서 평균0.03%의 성능향상을 얻을 수 있었다. In this paper, we propose an effective memory reduction algorithm to reduce the amount of reference frame buffer and memory bandwidth in video encoder and decoder. In general video codecs, decoded previous frames should be stored and referred to reduce temporal redundancy. Recently, reference frames are recompressed for memory efficiency and bandwidth reduction between a main processor and external memory. However, these algorithms could hurt coding efficiency. Several algorithms have been proposed to reduce the amount of reference memory with minimum quality degradation. They still suffer from quality degradation with fixed-bit allocation. In this paper, we propose an adaptive block-based min-max quantization that considers local characteristics of image. In the proposed algorithm, basic process unit is 8x8 for memory alignment and apply an adaptive quantization to each 4x4 block for minimizing quality degradation. We found that the proposed algorithm can obtain around 1.7% BD-bitrate gain and 0.03㏈ BD-PSNR gain, compared with the conventional fixed-bit min-max algorithm with 37.5% memory saving.