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박명철 ( Myung Chul Park ) 연세대학교 통일연구소 1999 통일연구 Vol.3 No.2
This essay deals with the understanding of human beings in Juche philosophy that has dominated the North Korean society more than half a century. Emphasizing to build up a socialist society and human beings fitting to this society, North Korea has proclaimed, in particular, her idea of remaking human beings. Therefore, this essay examines the basic framework, such as how Juche philosophy understands human beings, and how this understanding supports ideologically to its social reformation and political system. This attempt will be the foundation to understand the North Koreans` value-system, way of thinking, and structure of consciousness, and also contribute to mutual embrace between North Koreans and South Koreans for reunification. In terms of perspective to see North Korea as well as methodology to approach this issue, the author used critical immanent approach that let North Koreans tell themselves and then criticize their logic and theory. The criticism was also done by socialists, such as Karl Marx and Ludwig Feuerbach, and this author added some comments. In the second section of this essay, socio-political background of Juche philosophy, i.e. the process and content of "Juche socialism" since the establishment of "socialist system" by proclamation of socialist constitution in 1972, was discussed. And then the anthropology of Juche philosophy was analyzed: the "philosophical principle" of Juche idea, the thesis that "humans are subjects of everything"; concepts and interrelations of three attributes of human beings, i.e. "independence", "creativity", "consciousness"; the difference between "sociopolitical life" and "sociopolitical organism", and its theoretical link with the Party and the Leader. These themes were defined and analyzed, and then the criticism from the socialist perspective through Karl Mark and Ludwig Feuerbach was attempted. In the third section, problems raised by Juc!1e anthropology were arranged as the following four thesis. Thesis 1, people`s hope: "humans become subjects of the world"; thesis 2, "people are subjects of history"; thesis 3, use of violence and sufferings of "revolutionary humans"; thesis 4, dual ethical rule: "one for all, all for one." These theses were examined from the perspective of social ethics, and their criticism was added. In the fourth section, as the conclusion, the limit of this research and future tasks, as well as this author`s suggestions, were added in the hope of future reunification of humans between North and South. On the limit of this research, this author noted "critical immanent approach" based on written sources in a situation of little interactions between North and South. To its complement, in case of Germany after unification, socio-psychological and psychotherapic researches on the old East Germans are being seriously undertaken, this author hope that such researches should be done in Korea. And a brief introduction of an encouraging aspect by psychotherapic researches on those who fled from North Korea and emigrated to South Korea was added.
박명철(Myung Chul Park),차대웅(Daewoong Cha),한동석(Dong Seog Han) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6
본 논문은 서로 다른 부반송파 간격을 가진 OFDM(orthogonal frequency division multiplexing) 기반 무선 통신 신호를 분별하기 위하여 MFB(multiple FFT window banks) 기반의 CNN(convolutional neural network) 모델을 제안한다. 기존 딥러닝 기반 ACM(automatic modulation classification) 모델은 단일 반송파 기반의 변조 방식에 대한 분류 정확성을 향상시켰다. 그러나 동일한 대역폭에서 서로 다른 부반송파 간격을 가진 OFDM 신호를 분류하지 못하는 문제점을 가진다. 본 논문에서 제안한 MFB 기반 CNN 모델의 분류 성능이 기존 시간영역에서의 IQ(in-phase and quadrature phase) 기반 CNN 모델과 A/P(amplitude/phase) 기반 LSTM(long-short term memory) 모델의 분류 성능보다 향상됨을 모의실험을 통하여 보였다.
$0.13{\mu}m$ CMOS 공정을 이용한 X-band용 직교 신호 발생 전압제어 발진기
박명철,정승환,어윤성,Park, Myung-Chul,Jung, Seung-Hwan,Eo, Yun-Seong 대한전자공학회 2012 電子工學會論文誌-SD (Semiconductor and devices) Vol.49 No.8
본 논문에서는 X-band 주파수 대역을 위한 직교 신호 발생 전압제어 발진기(Quadrature VCO)를 제안하였다. 제안된 직교신호 발생 전압제어 발진기는 $0.13{\mu}m$ CMOS 공정을 사용하였다. 본 논문에서 제안된 직교 신호 전압제어 발진기는 두 개의 cross-coupled된 차동의 전압제어 발진기와 두 개의 차동 완충기로 구성 되어있다. 이 직교 전압제어 발진기는 4 bit의 capacitor bank와 varactor의 제어 전압으로 주파수를 가변한다. Varactor의 Q-factor를 선형적으로 변화시키기 위해, varactor 에 각각의 다른 bias voltage를 인가하였다. 이 직교 전압제어 발진기는 6.591 GHz에서 8.012 GHz까지의 주파수 가변 범위를 가진다. 이 직교 전압제어 발생기는 7.150 GHz의 출력 주파수를 가질 때 1MHz offset에서 -101.04 dBc/Hz의 Phase noise를 가진다. 공급 전압은 1.5V를 사용 하였고 QVCO core에서 6.5~8.5 mA의 전류를 소모한다. A quadrature voltage controlled oscillator(QVCO) for X-band is presented in this paper. The QVCO has fabricated in Charted $0.13{\mu}m$ CMOS process. The QVCO consists of two cross-coupled differential VCO and two differential buffers. The QVCO is controlled by 4 bit of capacitor bank and control voltage of varactor. To have a linear quality factor of varactors, voltage biases of varactors are difference. The QVCO generates frequency tuning range from 6.591 GHz to 8.012 GHz. The phase noise is -101.04 dBc/Hz at 1MHz Offset when output frequency is 7.150 GHz. The supply voltage is 1.5 V and core current 6.5-8.5 mA.