새로운 스위칭함수를 이용한 가변구조 위치제어기

박규남,송명현 순천대학교 공업기술연구소 1990 工業技術硏究所論文集 Vol.4 No.-

A control system of brushless dc machine position control based on Variable Structure System approach is presented. In order to simplify the overall control system and to improve the robustness of position controller, a new switching function which composed of linear combination of only measurable state variables Sr(x) and Sr(x) is defined. With this proposed method, good dynamic and steady state behaviors of the overall system are obtained without any external load torque observer. A general PWM amplifier is replaced by an ON―OFF pattern generator for digitalization and a digital signal processor(DSP) is used for high speed switching. Experimental results are given to demonstrate the validity of the proposed control method.

저선량 방사선조사가 Gerbil의 일과성 전뇌 허혈에 미치는 영향

박규남,최승필,김영민,서진숙,김세경 대한응급의학회 2002 대한응급의학회지 Vol.13 No.2

Purpose: To date, much research has been performed for amelioration of secondary brain damage after cerebral ischemia and reperfusion. We investigated the antioxidative and anti-inflammatory effects of post-ischemic low-dose total-body irradiation (TBI) on transient global cerebral ischemia. Methods: The gerbils were divided into six groups (8 gerbils in each group): group Ⅰ and Ⅱ, sham operation; group Ⅲ and Ⅳ, 10-minutes ischemia without TBI; group Ⅴ and Ⅵ, 10-minutes ischemia with TBI at 10 minutes after reperfusion. The activity of superoxide dismutase (SOD) and the levels of myeloperoxidase (MPO) and malondial-dehyde (MDA) in the brains of group Ⅰ, Ⅲ, and Ⅴ at 4 hours after reperfusion were measured. In the brains of group Ⅱ, Ⅳ, and Ⅴ, the levels of MPO and MDA were measured and the hippocampal areas were stained with hemotoxylineosin (H-E) and TUNEL at 5 days after reperfusion. Results: The activity of Cu/Zn SOD in group V was significantly increased compared to that in group Ⅲ, but their activities were significantly lower than that of group Ⅰ. The MPO and MDA levels in groups Ⅴ and Ⅵ were significantly lower than that of group and Ⅳ. The percent dead neurons found in the hippocampal CA1 region by using H-E staining was significantly lower in group VI than in group Ⅳ. The number of TUNEL positive cells in the hippocampal CA1 region was significantly lower in group Ⅵ and in group Ⅳ. Conclusion: Anti-oxidative and anti-inflamatory responses induced by post-ischemic low-dose TBI may reduce secondary neuronal damage following 10 minutes of transient global cerebral ischemia.

심폐 소생술 후 저산소성 허혈성 혼수 환자의 임상적 경과

박규남,최승필,이미진,김영민,최경호,성춘호,곽태영,이원재 대한응급의학회 2005 大韓應急醫學會誌 Vol.16 No.3

마이크로 프로세서에 의한 多重채널 데이터 側定에 관한 硏究

朴奎南,張永學,文彩柱 순천대학교 공업기술연구소 1987 工業技術硏究所論文集 Vol.1 No.-

Data acquisition of fast time­varying phenomena is relevant to voltage measurement such as speed retrieval of data for analysis, number of channels, etc. To overcome these limitation, a software­based high speed Multichannel Data Acquisition system has been designed and developed. The prototype hardware assembly consists of R6502 microprocessor, 8 bit A/D converter with 8 channel analog multiplexer and related interface circuitry. The data are stored in 32k byte DRAM memory and the stored data are retrieved by a low speed system clock through a digital­to­analog converter onto an X­Y recorder.

경계성인격장애 환자에서 임상적 특성과 마음헤아리기 능력의 연관성: 한국인 코호트 예비분석

박규남,석정호,신현경 대한신경정신의학회 2022 신경정신의학 Vol.61 No.3

Objectives Several studies have reported an impairment of the mentalization capacity in borderline personality disorder (BPD). However, studies on the mentalization capacity in patients with BPD are scarce in Korea. The current study examined the clinical characteristics of BPD and its association with mentalization capacity. Methods Data from the study for developing a prospective clinical cohort and a Korean evidence- based treatment program for patients with BPD were analyzed. Fifty-nine participants (37 BPD patients, 22 healthy controls) were included in this study. The clinical characteristics, including depression and suicidality, adult attachment type, adverse childhood experiences, mentalization capacity, borderline personality symptom severity, resilience quotient, and temperament and character, were measured. An independent t-test, chi-square test, ranked ANCOVA, and multiple stepwise regression analysis were conducted for statistical analyses. Results Patients with BPD showed significant differences in mentalization capacity, adverse childhood experiences, attachment types, depression, and resilience profiles compared to the healthy control group. In this study, the impairment of mentalization capacity was significantly associated with temperament and character factors and borderline personality symptom severity. Conclusion The findings of this study suggest that mentalization capacity is associated with personality factors, including temperament and character, as well as the severity of personality psychopathology in Korean patients with BPD. Further analyses with a larger number of patients will be needed.

Logistics Data Warehouse를 활용한 반도체 물류 분석 방법

박규남,조민수,송민석,이진연 대한산업공학회 2019 대한산업공학회 춘계학술대회논문집 Vol.2019 No.4

AC / DC 컨버터의 간접전류제어를 위한 델타 변조방식에 관한 연구 ( A Study on the Delta Modulation Method for Indirect Current Control in AC / DC Converter )

박규남,김광헌 대한전자공학회 1995 대한전자공학회 학술대회 Vol.1995 No.1

A Comparison of Genospecies of Clinical Isolates in the Acinetobacter spp. Complex Obtained from Hospitalized Patients in Busan, Korea

박규남,강혜숙,김혜란,정보경,김도희,장경수 대한의생명과학회 2019 Biomedical Science Letters Vol.25 No.1

Of the Acinetobacter spp., A. baumannii (genospecies 2) is the most clinically significant in terms of hospital-acquired infections worldwide. It is difficult to perform Acinetobacter-related taxonomy using phenotypic characteristics and routine laboratory methods owing to clusters of closely related species. The ability to accurately identify Acinetobacter spp. is clinically important because antimicrobial susceptibility and clinical relevance differs significantly among the different genospecies. Based on the medical importance of pathogenic Acinetobacter spp., the distribution and characterization of Acinetobacter spp. isolates from 123 clinical samples was determined in the current study using four typically applied bacterial identification methods; partial rpoB gene sequencing, amplified rRNA gene restriction analysis (ARDRA) of the intergenic transcribed spacer (ITS) region of the 16~23S rRNA, the VITEK® 2 system (an automated microbial identification system) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). A. baumannii isolates (74.8%, 92/123) were the most common species, A. nosocomialis (10.6%, 13/123) and A. pittii isolates (7.5%, 9/123) were second and third most common strains of the A. calcoaceticus-A. baumannii (ACB) complex, respectively. A. soli (5.0%, 6/123) was the most common species of the non-ACB complex. RpoB gene sequencing and ARDRA of the ITS region were demonstrated to lead to more accurate species identification than the other methods of analysis used in this study. These results suggest that the use of rpoB genotyping and ARDRA of the ITS region is useful for the species-level identification of Acinetobacter isolates.

TCR-靜止形 無效電力補償裝置의 周波數應答에 대한 等價回路解析

朴奎南,張永學,鄭榮國 순천대학교 공업기술연구소 1988 工業技術硏究所論文集 Vol.2 No.-

Traditionally, the model for power switching circuits at harmonic frequencies connected to an ac system has been an ideal current source. The magnitudes of the currents at each frequency are derived from the anaiysis of idealized current waveform. These currents are injected into the ac system to determine the resonant frequencies and harmonic penetration into the system. A more accurate model for frequency plane analysis is proposed and it is applied to a static VAR compensator(SVC) consisting of a fixed capacitor in parllel with a thyristor controlled reactor(FC­TCR). This model consists of a harmonic voltage source in series with a variable source admittance. The differential equations for the system are first written in order to gain a better insight to the problem. The model is hypothesized and the circuit is analyzed to determine its parameters. Finally, the results of a model test is shown which verify the accuracy of the model.

PWM制御 單相 能動 交流電力필터에 의한 高調波 著減에 關한 硏究

朴奎南,鄭榮國 순천대학교 공업기술연구소 1990 工業技術硏究所論文集 Vol.4 No.-

A closed­loop control system to reduce the harmonics required by PWM controlled single phase Active AC power filter is proposed. The instantaneous harmonics which consist of both displacement of fundamental current and harmonic distortion current is measured and compensated by Active power filter connected parallel between power lines and nonlinear load. A combination of a D.C choke and a transistor Inverter is used for the Active power filter. The principal and the construction of the control system are presented as well as some experimental results. The results are obtained as follows. 1) The reactive power including both displacement of fundamental current and harmonics distortion current of 1.5[KHz] and below can be eliminated. By the use of closed―loop control, the accuracy of compensation is excellent. 2) The voltage fluctuation of power supply is not disturbed, because the power is improved from 0.65 to 0.96 by the use of Active power filter. 3) Fast response of 8.3[㎳] for quick changes of the load can be attained. 4) Because of using a power transistor as the switching element of the current type PWM Inverter, the compensating time is more improved and commutation loss in Inverter becomes nearly zero. 5) In order to eliminate harmonic current of more than 1.5[KHz], the PWM Inverter using as Active power filter must be multi―current type.