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87C51을 이용한 분산처리 감시 및 제어 시스템의 설계에 관한 연구
홍순철,정경열,Hong, Sun-Cheol,Jeong, Gyeong-Yeol 한국기계연구원 1994 硏究論文集 Vol.24 No.-
Design and implementation of monitoring and control system using dual-microprocessor node is presented for real time process. The proposed system is implemented with 2 of the single chip microprocessors in tightly coupled mode and results in speed up of $s_p=1.74.$ Under the assumption that the nodes are interconnected in multidrop. the overall system performance such as average throughout-delay characteristics and effective throughput are analyzed using M/G/1 gueueing model, and results show that the proposed node can be used to medium sized distributed monitoring and control system.
홍순철,황라일,안기훈,김경하,정성원 한국모자보건학회 2015 한국모자보건학회지 Vol.19 No.2
Purpose: This study was to investigate the status of Preconception Care (PC) and associated factors. Methods: A convenience sample consisting of 400 pregnant women who took maternity schools at a university hospital and a specialty hospital. Subjects, who agreed to participate in the study, completed self-administrated questionnaire (K-University hospital institutional review board) containing characteristics of preconceptional and pregnant period. Results: Although 84.7% of study subject perceived PC, only about half (54.1%) visited clinics for basic medical tests and treatments before pregnancy. The consultation rates on chronic diseases, drugs and spouse tests were even lower. Associated factors of PC included age (OR:0.114), prepregnant BMI (OR: 0.390), previous pregnancy (OR: 4.276), and perception on PC (OR:13.907). Conclusion: This study suggested that the academic and politic attention should be paid to PC management standards and related policies that include inter-conception care and sexuality education for adolescent.
이중마이크로프로세서의 이용과 분산처리기법을 도입한 선박용 원격제어 시스템의 설계에 관한 연구
홍순철,정경열,류길수 한국마린엔지니어링학회 1994 한국마린엔지니어링학회지 Vol.18 No.5
In this paper design and implementation of ship's distributed remote control system using dual-microprocessor is presented for real time process. The proposed system is implemented with the single chip microprocessors in tightly coupled mode and results in speed up of $s_p$=1.74. Under the assumption that the nodes are interconnected in multidrop, the overall system performance such as average throughout-delay characteristics and effective throughput are analyzed using M/G/1 queneing model, and results show that the proposed node can be used in medium sized distributed monitoring and control system.
Magnetism of the MnPt3 (001) Surface: First-Principles Study
홍순철 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.3
Most bulk TMPt3 (TM = transition metal) samples except MnPt3 have an antiferromagnetic (AFM) ground state. In this study we discuss the electronic structures and magnetisms of the bulk MnPt3 and the bulk-terminated MnPt3 (001) surface by using the full-potential linearized augmented plane wave method. The exchange-correlation interaction is described by using a general gradient approximation. The ground state of the bulk is ferromagnetic (FM). The FM state is more stable by energy dierences of 60 and 140 meV, compared to the A-type AFM and the C-type AFM states, respectively. The magnetic structure at the bulk-terminated MnPt3 (001) surface is dierent from that of the bulk MnPt3. The band localization at the surface is one of the reasons for the magnetic transition at the surface.