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Computer Graphics에 의한 3성분계 Wilson, NRTL 및 UNIQUAC 방식을 이용한 VLE 추정방식의 비교
신형섭,박종철 慶熙大學校 1988 論文集 Vol.17 No.-
The purpose of this study is to estimate VLE by means of the Wilson, NRTL, UNIQUAC equations and to compare with these three methods for two ternary systems: ethanol-benzene-cyclohexane, cyclohexanone-cyclohexanol-phenol, by the computer graphic technology. The temperatures and compositions of two systems were estimated by means of three TPTT equations. Isothermal lines of these two ternary systems were graphically illustrated from these estimated values and the reported experimental values. As a result of the analysis of the parameters and computer graphics, these parameter pairs changing with respect to the temperature and composition of the solutions. From the result of plotting the parameter pairs, A_12, vs, A_21, a locus contour between two parameters is observed, therefore numerous number of roots to satisfy these TPTT equations are found. These phenomena is nearly identical with the previously reported results that there are some correlation between these parameter pairs.
서덕영,장승기,경문현,박섭형 경희대학교 산학협력기술연구원 1996 산학협력기술연구논문집 Vol.2 No.-
This paper describes two traffic shaping methods for VBR(variable bit rate) video bit streams encoded in the MPEG-2 syntax. Difficulties in control of VBR video traffic are lessened by traffic shaping. Burstness of single layer MPEG-2 can be reduced by performing intra-refresh in more than one consecutive frames. In two layer encoding of spatial scalability, burstness can be reduced by setting the temporal locations of GOP starting frame of a layVBR 트래픽을 허용한다는 것이다. 모든 AAL er, differently from the other. Queueing analysis shows that these two methods outperform conventional encoding schemes in terms of temporal and semantic QoS requirements.
Park, Hyun Ah,Kwon, Ok-Kyoung,Ryu, Hyung Won,Min, Jae-Hong,Park, Min-Woo,Park, Mi-Hyeong,Paik, Jin-Hyub,Choi, Sangho,Paryanto, Imam,Yuniato, Prasetyawan,Oh, Sei-Ryang,Ahn, Kyung-Seop,Lee, Jae-Won D.A. Spandidos 2019 International journal of molecular medicine Vol.43 No.4
<P><I>Physalis peruviana</I> L. (PP) is well known for its various properties, including its antioxidant property. In our previous study, the protective effects of PP against cigarette smoke-induced airway inflammation were confirmed. The purpose of the present study was to evaluate the anti-inflammatory effect of PP against ovalbumin (OVA)-induced airway inflammation. Treatment with PP inhibited the numbers of eosinophils and the levels of inflammatory cytokines, including interleukin (IL)-4, IL-5 and IL-13, in the bronchoalveolar lavage fluid (BALF) of animal models with OVA-induced allergic asthma. PP also significantly decreased the production of total immunoglobulin E in the serum. Lung sections stained with hematoxylin and eosin revealed that the influx of inflammatory cells was decreased in the lungs of mice treated with PP compared with cells in the OVA group. The increased expression levels of monocyte chemoattractant protein-1 (MCP-1) and T cell marker KEN-5 were also reduced following PP treatment in the lung tissues compared with those in the OVA group. The PAS staining results showed that PP attenuated the overproduction of mucus in the lung. Additionally, western blot analysis revealed that PP significantly downregulated the activation of nuclear factor-κB/p38 mitogen-activated protein kinase/c-Jun N-terminal kinase, and upregulated the expression of heme oxgenase-1 in the lungs. In an <I>in vitro</I> experiment, PP effectively reduced the levels of LPS-stimulated MCP-1 in a concentration-dependent manner. Taken together, these results indicate that PP has considerable potential in the treatment of allergic asthma.</P>
MULTI-POINT MEASUREMENT OF STRUCTURAL VIBRATION USING PATTERN RECOGNITION FROM CAMERA IMAGE
Jeon, Hyeong-Seop,Choi, Young-Chul,Park, Jin-Ho,Park, Jong-Won Korean Nuclear Society 2010 Nuclear Engineering and Technology Vol.42 No.6
Modal testing requires measuring the vibration of many points, for which an accelerometer, a gab sensor and laser vibrometer are generally used. Conventional modal testing requires mounting of these sensors to all measurement points in order to acquire the signals. However, this can be disadvantageous because it requires considerable measurement time and effort when there are many measurement points. In this paper, we propose a method for modal testing using a camera image. A camera can measure the vibration of many points at the same time. However, this task requires that the measurement points be classified frame by frame. While it is possible to classify the measurement points one by one, this also requires much time. Therefore, we try to classify multiple points using pattern recognition. The feasibility of the proposed method is verified by a beam experiment. The experimental results demonstrate that we can obtain good results.
전형섭(Jeon, Hyeong-Seop),최영철(Choi, Young-Chul),박진호(Park, Jin-Ho),박종원(Park, Jong-Won) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.11
Accelerometer and laser vibrometers are widely used to measure vibration of structures like a building or piping. Recently, the research measuring vibration by using camera image is introduced. This method can measure multi-points simultaneously. Also, it is possible to measure in the long distance. When we measure the vibration using a camera, the parameter analysis is needed. Therefore, this paper took the experiment for the camera lens selection. An error by the camera images characteristic was theoretically analyzed and we verified through an experiment. And the accuracy of the method measuring the vibration displacement by using the camera images was analyzed.