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.

가새배치에 따른 고층건물의 변위에 관한 연구

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%.

組積메움壁의 耐震性 評價에 關한 硏究

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>

Center of Urban Life and Diversion from the Mundane

Choi Tae-won Freelance Seo Heun-kang Photographer The Korea Foundation 2004 Koreana (English) Vol.18 No.2

Min Hong-gyu ―Keeping Alive the Tradition of Royal Seals

Choi Tae-won Freelance Reporter Seo Heun-kang Photographer The Korea Foundation 2006 Koreana (English) Vol.20 No.2

Determination of Electronic and Ionic Partial Conductivities of BaCeO₃ with Yb and In Doping

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>

Goh Heung-gon; Breathing Life into Traditional Musical Instruments

Choi Tae-won Freelance Seo Heun-kang Photographer The Korea Foundation 2003 Koreana (English) Vol.17 No.4

원위부 요골 골절의 수술적 치료 후 방사선학적 정복소실 -K-강선 단독 고정과 외고정 장치 병행 고정 간의 비교-

정현균 ( Heun Guyn Jung ),최진배 ( Jin Bae Choi ),서승용 ( Seung Yong Seo ),최용수 ( Yong Soo Choi ) 대한골절학회 2006 대한골절학회지 Vol.19 No.4

목적: 원위부 요골 골절의 수술적 치료 중 K-강선 단독 고정과 K-강선과 외고정 장치 병행 고정 후 발생하는 방사선학적인 정복소실을 비교 분석하였다. 대상 및 방법: 원위부 요골 골절로 K-강선 단독 고정 혹은 K-강선과 외고정 장치 병행 고정술을 받은 환자 중 1년 이상 추시가 가능하였던 60예의 환자를 대상으로 수술 직후와 최종 추시상의 요골 길이, 요골 경사각 그리고 수장측 경사각의 정복 소실을 측정하여 수술방법, 골절의 분류, 연령군에 따라 비교 분석하였다. 결과: K-강선 단독 고정군의 수장측 경사각이 K-강선과 외고정을 병행 고정한 군에 비교하였을 때 더 많은 정복 소실을 보였다(p<0.05). K-강선 단독 고정군을 관절내 골절군과 관절외 골절군으로 나누어 비교하였을 때 관절내 골절군이 관절외 골절군보다 요골 길이와 요골 경사각에서 더 많은 정복 소실을 보였다 (p<0.05). K-강선과 외고정 병행 고정군내에서는 관절내 골절군과 관절외 골절군간에 방사선학적인 정복소실 면에서 유의한 차이는 보이지 않았다 (p>0.05). 60세 미만의 군과 60세 이상의 군으로 나누어 방사선학적 정복 소실을 비교하였을 때 통계적으로 유의한 차이를 보이지 않았다. 결론: 원위부 요골 골절 중에서 특히 관절내 골절의 경우 K-강선 단독 고정 시에는 관절외 골절에 비교하였을 때 정복 소실이 가능성이 높으므로 외고정을 추가하는 것이 정복 소실을 줄이는 방법이라 생각된다. Purpose: To compare and analyse radiologic reduction loss between fixation with K-wire only group and fixation with K-wire and external fixator group for surgical treatment of distal radial fracture. Materials and Methods: We analysed 60 patients who received the operative treatment with K-wire fixation only or K-wire and external fixator and also were in regular follow up at least one year. We compared radiologic reduction loss of radial length, radial inclination and volar tilt between immediate post-operative radiograph and latest follow up radiograph according to operative methods, fracture patterns and age groups. Results: Reduction loss of volar tilt was greater in fixation with K-wire only group than fixation with K-wire and external fixator group (p<0.05). Reduction losses of radial length and radial inclination were more in intra-articular subgroup than extra-articular subgroup in fixation with K-wire only group (p<0.05). No significant difference of reduction loss was noted between intra-articular and extra-articular subgroups in fixation with K-wire and external fixator group. Conclusion: More radiologic reduction loss can be expected in fixation with K-wire only group for intra-articular distal radius fracture compared with extra-articular distal radius fracture. Additional external fixation should be added in intra-articular distal radius fracture to reduce radiologic reduction loss.

자기치유 캡슐용 무기계 액상 코어소재를 적용한 시멘트 복합체의 역학적 특성에 관한 실험적 연구

최연왕(Choi, Yun Wang),오성록(Oh, Sung Rok),최병걸(Choi, Byung Keol),김철규(Kim, Cheol Gyu),이재흔(Lee, Jae Heun) 한국콘크리트학회 2016 한국콘크리트학회 학술대회 논문집 Vol.28 No.2