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Effects of a herbal compound, KIOM-C, on growth performance and immune response in commercial pigs
정창민,구본상,강신영 충북대학교 동물의학연구소 2019 Journal of Biomedical and Translational Research Vol.20 No.1
The use of non-therapeutic antibiotics as animal feed additives has raised public health concerns due to the increasing resistance of pathogens to antibiotics. It is therefore required to develop safe and effective alternative feed additives to replace non-therapeutic antibiotics. The aim of this study was to assess the effects of the multi- herbal compound, KIOM-C, on growth performance and immune response of growing-to-finishing pigs under farm conditions. The experimental trials were performed in a Korean commercial swine growing-to-finishing complex, and a total of 70-day-old 160 pigs were selected. Eighty pigs were treated with KIOM-C at the level of 2 kg/tonne until slaughter age (KT group), while another 80 pigs were not treated with KIOM-C (NT group). All animals were vaccinated against foot-and-mouth disease (FMD) at 60 and 110 days of age. During the trial period, average daily weight gain (ADWG), average daily feed intake (ADFI), feed conversion ratio (FCR), survival rates, and average slaughter ages were measured. The serum concentrations of tumor necrosis factor-a (TNF-α), interferon-γ (IFN-γ), and IgA were also evaluated. In order to evaluate specific humoral immune responses, the foot-and-mouth disease virus (FMDV) serotype O-specific antibody was measured. The ADWG, ADFI, and FCR of the KT group were significantly greater than those of the NT group (p<0.05). Serum concentrations of IgA in the KT group was statistically higher than the NT group. The antibody levels of the KT group against FMDV serotype O was higher than the NT group, and 86.67% of the KT group tested positive for anti-FMDV antibodies. Overall, these findings suggest that KIOM-C improves growth performance and immune response of pigs under growing-to-finishing farm conditions, and implies that the herbal compound may be used as a suitable alternative feed additive.
플래시 기반 기계제도 교육 자료의 개발 및 적용 효과 실험
정창민,김수진 한국공학교육학회 2013 공학교육연구 Vol.16 No.4
This paper investigated the effect of multimedia educational program developed based on Flash for learning how to make a part drawing of V-belt drive. The scholastic achievements of experimental group learned by the program were higher than traditional group in case of technical high school students, but they were not different in case of university students.
정창민,이광엽,박태룡,Jung, Chang-Min,Lee, Kwang-Yeob,Park, Tae-Ryong 한국전기전자학회 2015 전기전자학회논문지 Vol.19 No.2
본 논문에서는 자이로 센서와 가속도 센서로부터 얻은 정보를 보정 및 융합하여 자세를 추정하는 칼만 필터 기반 센서 융합 필터의 설계를 제안한다. 최근 센서 네트워크 기술의 발전으로 인해 센터 데이터의 융합 기술이 요구되고 있다. 본 논문에서는 필터의 비선형 시스템 모델을 Jacobian Matrix 연산을 통해 선형 시스템 모델로 변환하며, 오일러 적분을 통해 추정 값을 예측한다. 제안한 필터는 Xilinx 사의 Virtex-6 FPGA Board 를 이용하여 구현하였다. 구현한 필터는 74MHz 동작 주파수로 동작하며, 기존 필터들과 구현한 필터를 비교하여 추정 자세의 정확도 및 신뢰도를 확인하였다. In this paper, a Kalman filter-based sensor fusion filter that measures posture by calibrating and combining information obtained from acceleration and gyro sensors was proposed. Recent advancements in sensor network technology have required sensor fusion technology. In the proposed approach, the nonlinear system model of the filter is converted to a linear system model through a Jacobian matrix operation, and the measurement value predicted via Euler integration. The proposed filter was implemented at an operating frequency of 74 MHz using a Virtex-6 FPGA Board from Xilinx Inc. Further, the accuracy and reliability of the measured posture were validated by comparing the values obtained using the implemented filters with those from existing filters.