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백한솔,정연우,주미소,정용화,박대희,김학재 한국멀티미디어학회 2016 멀티미디어학회논문지 Vol.19 No.8
To reduce huge losses in pig farms, weaning pigs with weak immune systems are required to be carefully supervised. Even if various researches have been performed for pig monitoring environment, segmenting each pig from touching-pigs is still entrenched as a difficult problem. In this paper, we propose a segmentation method for touching-pigs by using concave-points and edge information in a video surveillance system. Especially, we interpret the segmentation problem as a time-series analysis problem in order to identify the concave-points generated by touching-pigs. Based on the experimental results with the videos obtained from a domestic pig farm, we believe that the proposed method can accurately segment the touching-pigs.
유한차분법을 이용한 비등방성 복합적층판의 안정성에 관한 연구
백한솔,이상열,장석윤 서울시립대학교 산업기술연구소 1998 산업기술연구소논문집 Vol.6 No.1
The solution of anisotropic plates using classical methods is limited to relatively simple load and boundary conditions. If these conditions are more complex, the analysis becomes increasingly tedious and even impossible. For many plate problems of considerable practical interest analytic solutions to the governing differential equations cannot be found. Among the numerical techniques presently available, the finite difference method(FDM) is a powerful numerical method. The objective of this paper is to analyze stability of anisotropic composite laminated plates considering shear deformation. In applying numerical methods to slove differential equations of anisotropic plates, this study uses the finite difference methods. In determining the eigenvalue for unsymmetric system matrix by FDM, this paper uses the householder method in IMSL(International Mathematical Software Library). Several numerical examples show the effectiveness of this study and they will give a guide in deciding minimum buckling load and various mode shapes.
백한솔,김민제,백정주,김도환,신교직,최경호,조정호 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
We fabricated a high-quality PHPS-derived SiO<sub>2</sub> film by intense pulsed UV irradiation and applied it as a gate dielectric layer in OFETs and complementary inverters. The conversion process of PHPS to SiO<sub>2</sub> was optimized by varying the number of intense pulses and applied voltage. The chemical structure and gate dielectric properties of the PHPSderived SiO<sub>2</sub> films were systematically investigated via FT-IR spectroscopy and leakage current measurements, respectively. The resulting PHPS-derived SiO<sub>2</sub> gate dielectric layer showed a leakage current density of 9.7×10-12Acm<sup>-2</sup> at 4.0MVcm<sup>-1</sup>. The fabrication of the PHPS-derived SiO<sub>2</sub> gate dielectric layer by a simple solution process and intense pulsed UV irradiation at room temperature serves as a novel approach for the realization of large-area flexible electronics in the flexible device industry of the future.