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CAN 통신을 위한 Windows 환경에서의 가상 디바이스 드라이버 개발
최흔정,김대원 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-
The CAN(Controller Area Network) of fieldbus for factory automation is sensor level protocol using the lower two layers of seven layers defined by ISO(International Standard for Standardization). It is necessary to design the application layer. It includes the communication scheduling of CAN network and the integrated environment for monitoring it to design the application layer. It is implemented under the Windows operating system of Microsoft to construct integrated environment for CAN network. Designing PC interface card and the virtual device driver for it are done before constructing of the integrated environment for CAN network. This paper presents the design of PC interface card, the virtual device driver for it, and the definition and implementation of the integrated environment for CAN network.
최영화,임헌욱 대구대학교 산업기술연구소 2014 産業技術硏究 Vol.25 No.1
Mordern structures tend to be high-rise buildings because of the population growth, restraint of lands and the high value of lands. In aspect to the control of lateral displacement, the importance of wind load and seismic load is also increasing to get the resistance against lateral load. The purpose of this study is to analyze the base building and 12-case models according to the bracing arrangement, the relative stiffness ratio of column and girder, the number of floor and the bracing section area by using MIDAS/GENw computer program. The results are as followings ; 1. Case 2 is effective in the vertical bracing arrangement. 2. Case 6 is effectual in the group bracing arrangement. 3. Case 8 and 10 are efficient in the diagonal and the horizontal bracing arrangements, respectively. 4. Case 8 among the diagonal bracing arrangements shows the smallest displacement value in all 12 cases, compared with the base building by decreasing as much as 48%.
李皓,崔棅極,金炫山 嶺南大學校 工業技術硏究所 1990 연구보고 Vol.18 No.1
Due to concentration and high density of population, the style of building becomes high rise. Therefore, the buildings require structures such as braces and shearing walls capable to resist various lateral forces caused by wind and earthquake. Domestically, the masonry wall with frame is used as partition walls, which is considerate as a simple wall and the bearing capacity of which is neglected. It is accepted that when masonry wall and frame interacts each other, the bearing capacity acts to some degree. In this study, to find the interaction of masonry wall frame, the author selects ten models and to analysis models by finite element method which is used widely in engineering method. The author has studied rigidity contribution of wall and the ratio of bearing force increasement to frame. The equivalent brace is substituted for in filled masonry wall and is compared with the existing method. The results are as follows. 1. When masonry Wall and frame interacts each other, horizontal rigidity of frame increases remarkably. 2. When the ratio of length/height (L/H) of masonry wall become larger, horizontal rigidity increases, deflection decrease by the equivalent diagonal strut. 3. In case the ratio of length/height (L/H) below 0.5, the establishment of girder at an interval of H/2 effects in increasement of horizontal rigidity of frame.
Pregnancy Rates and Outcomes of HIV-Infected Women in Korea
Choi, Heun,Kim, Moo Hyun,Lee, Se Ju,Kim, Eun Jin,Lee, Woonji,Jeong, Wooyong,Jung, In Young,Ahn, Jin Young,Jeong, Su Jin,Ku, Nam Su,Baek, Ji Hyeon,Choi, Young Hwa,Kim, Hyo Youl,Kim, June Myung,Choi, Ju KOREAN ACADEMY OF MEDICAL SCIENCE 2018 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.33 No.47
<P><B>Background</B></P><P>Antepartum, intrapartum, and postpartum preventive measures with antiretroviral drugs, appropriate delivery methods, and discouraging breastfeeding significantly decrease the risk of mother-to-child transmission of human immunodeficiency virus (HIV) infection. Herein, we investigated the pregnancy outcomes in HIV-infected Korean women.</P><P><B>Methods</B></P><P>We retrospectively reviewed medical records of childbearing-age HIV-infected women between January 2005 and June 2017 at four tertiary care hospitals in Korea.</P><P><B>Results</B></P><P>Among a total of 95 HIV infected women of child-bearing age with 587.61 years of follow-up duration, 15 HIV-infected women experienced 21 pregnancies and delivered 16 infants. The pregnancy rate was 3.57 per 100 patient-years. Among the 21 pregnancies, five ended with an induced abortion, and 16 with childbirth including two preterm deliveries at 24 and 35 weeks of gestation, respectively. The two preterm infants had low birth weight and one of them died 10 days after delivery due to respiratory failure. Among the 14 full-term infants, one infant was small for gestational age. There were no HIV-infected infants.</P><P><B>Conclusion</B></P><P>The pregnancy rate of HIV-infected women in Korea is lower than that of the general population. Although several adverse pregnancy outcomes were observed, mother-to-child transmission of HIV infection was successfully prevented with effective preventive measures.</P>
Choi, Sung Min,Lee, Jong-Heun,Choi, Moon-Bong,Hong, Jongsup,Yoon, Kyung Joong,Kim, Byung-Kook,Lee, Hae-Weon,Lee, Jong-Ho The Electrochemical Society 2015 Journal of the Electrochemical Society Vol.162 No.7
<P>The total electrical conductivity of BaCeO<SUB>3</SUB>-based proton conductors with various dopants was measured using a DC-4 probe method. Yb and In were used as dopants to increase electrical conductivity and chemical stability, respectively. The electronic and ionic partial conductivities of samples of various compositions, i.e., BaCe<SUB>1-</SUB><I><SUB>x</SUB></I><SUB>-</SUB><I><SUB>y</SUB></I>Yb<I><SUB>x</SUB></I>In<I><SUB>y</SUB></I>O<SUB>3-δ</SUB>, where <I>x</I> = 0.1, <I>y</I> = 0.00, 0.05, and 0.10 (BC10Yb, BC10Yb05In, and BC10Yb10In, respectively) and <I>x</I> = 0.15, <I>y</I> = 0.00 (BC15Yb), were calculated based on the relevant defect chemistry model and interpreted as functions of fairly extensive ranges of <I>P</I>(O<SUB>2</SUB>) (−4 ≤ log <I>P</I>(O<SUB>2</SUB>) ≤ 0) and <I>P</I>(H<SUB>2</SUB>O) (−3.5 ≤ log <I>P</I>(H<SUB>2</SUB>O) ≤ −1.5) at 700°C. The partial conductivities of all charge carriers, i.e., protons, holes, and oxygen vacancies, increased with Yb doping but decreased as In doping increased. The variations in the partial conductivity of holes and protons induced by the composition of doping constituents can be explained by the difference in electronegativity between dopant cations and oxygen anions as well as A- and B-site cations that are most critical in a general hopping conduction mechanism. Oxygen ion conductivity is controlled by the dopant size and content, which generally alter the lattice spacing and distortion of the perovskite structure.</P>