A Study on the ecological marxism : A Study on the ecological marxism

박준건 釜山大學校 1996 人文論叢 Vol.48 No.1

It seems to be commonly accepted that Marxim has little to say about ecological problems, that its implicit positions are far from illuminating them, and, what is, more, that the Marxist position enables, causes, or legitimizes harm to the environment. At best Marxism is seen to be caught in the dilemma of rejecting the idiocy of rural life and at same time embracing the naturalization of man and the resurrection of nature. Reiner Grundmann tries to find out which sort of problems can be analysed by Marx's theory and which of its approaches are still convincing. And he gropes the reconstruction of Marx's thought and thinks there is something which can be exploited and reconstructed. This paper aims to study about the ecological Marxism by the young philosopher Reiner Grundmann who is centering on the anthropocentric standpoint. It seema to me that the anthropocentric standoint, in spite of a few deficiency, can povide us with a definite clue to solve the contemporary ecological crisis.

Wavelet Transform을 이용한 시청각 학습시의 전두부 뇌파 활성도에 관한 연구

이준탁,정소라,백승일 동아대학교 정보기술연구소 2006 情報技術硏究所論文誌 Vol.14 No.1

Real-time estimating brain waves is useful method in studies like brain activity state. And the frontal-lobe of cerebrum is important behavior for something new which intention response and consideration activities. In this paper, analyze the frontal-lobe Waves of cerebrum using wavelet, Furier transform during 5 times repeated new visual education teaching to middle school student. Many researches be attempted to find relation in concentration and emotion with the specify brain waves. There are three waves called α,β,θ waves generated by brain and it's related memory factor and continuous concentration in reseaches. a-wave, one of the three waves generated by brain which is identified that participating in motivate brain activities like attention and memory sequences. So analyze pattern and activity of a-signal in EEG-signals which changing in study sequence of student using wavelet transform for high analysis efficiency in signal processing in this paper.

Ball-Beam 시스템을 위한 적응 퍼지제어기의 설계

이준탁,김태우,김태홍 東亞大學校 大學院 1999 大學院論文集 Vol.24 No.-

The stabilization of a ball-beam system using the fuzzy modeling based adaptive fuzzy controller was introduced in this paper. Therefore, this paper introduces a technique for fuzzy structure identification of nonlinear input-output relationship using an daptive fuzzy inference system. And the experimental results using an adaptive fuzzy inference technique shows its effective-ness for fuzzy structure identification of nonlinear system. That is, the fuzzy modeling was acquired by an adaptive fuzzy inference technique which can accurately mapped the nonlinear input-output relationship. In order to show its effectiveness, the design adaptive fuzzy controller was implemented successfully on the 80586 microprocessor board with DT-2801.

Fuzzy Controller를 이용한 Servo System의 제어

이준탁,이승환 동아대학교 공과대학 부설 한국자원개발연구소 1991 硏究報告 Vol.15 No.1

A new control technique of designing a Fuzzy Controller, based on the vague informations and the Fuzzy Set theory, is introduced and is applied to the control of a Servo System which requires faster and more accurate dynamic responses compared with other complex industrial processes. A Fuzzy Controller designed by this algorithm is consisted of a set of linguistic rules which represented the control strategies of an experienced human expert. We prove also the adaptive performances against internal-external disturbances and the usefulness of this controller from the results of simulations.

신경회로망을 이용한 직류 서보 전동기의 위치제어용 적응형 자기동조 PID 제어기의 실현

이준탁,이민호,최우진,이상석 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2

In this paper, the design technique of AST NN PID controller with the newly proposed learning algorithm is presented. The proposed controller is implemented using a 80486 microprocessor and a DT-2801 data acquisition board and is applied to the accurate position control of unmodelled DC servo system with uncertainty. The computer simulation results and the related experimental ones at no-load and at full-load, shows that the implemented AST NN PID controller has the excellent dynamic responses against load disturbances.

ANFIS에 의한 비선형 입·출력 관계의 퍼지구조 동정에 관한 연구

이준탁,심영진,김태우 東亞大學校 附設 情報通信硏究所 1996 情報通信硏究所論文誌 Vol.4 No.1

The characteristics of nonlinear dynamical system using fuzzy inference technique can be described by fuzzy modeling. Therefore, this paper introduce a technique for fuzzy structure identification of nonlinear input-output relationship using ANFIS (Adaptive Neuro-Fuzzy Inference System). And the simulation results of using ANFIS show its effectiveness for fuzzy structure identification of nonlinear system.

負荷 判別을 위한 Wavelet 變煥의 응용에 관한 연구

이준탁,김태홍 東亞大學校 大學院 2000 大學院論文集 Vol.25 No.-

Recently, the subject of "wavelet analysis" has drawn much attention from both mathematical and engineering application fields such as Signal Processing, Compression/Decomposition, Wavelet-Neural Network, Statistics and etc. Analogous to Fourier analysis, wavelets is a versatile tool with very rich mathematical content an great potential for applications. Specially, wavelet transform uses localizable various mother wavelet functions in time-frequency domain. Therefore, wavelet transform has a good time-analysis ability for high frequency component, and has a good frequency-analysis ability for low frequence component. Hence, by using these characteristics, each or mixed electrical load signals can be analyzed more easily and accurately than other conventional techniques. In this paper, discrimination analyses of acquired electrical current signals for each and mixed loads were tried by using Morlet wavelet transform. Their representative loads were classified as TV, DRY(Dryer), REF(Refrigerate), and FL(Fluorescent Lamp). Experimental results obtained from Morlet wavelet transform were shown to be more easily discriminative than that of the FFT(Fast Fourier Transform) usually applied.

비선형 시스템의 안정화 제어를 위한 RVEGA 최적 퍼지 제어기 실현

이준탁,박정훈 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1

In this paper, we proposed an optimal identification method of the membership functions and the fuzzy rules for the stabilization controller of the nonlinear system by RVEGA(Real Variable Elitist Genetic Algorithm). Although fuzzy logic controller have been successfully applied in industrial plants, they must rely on expert's emperial knowledge. So it is very difficult in determinations of the linguistic state space paritions, parameters of the membership functions and the extractions of the control rules. Most of conventional approaches have the drastic defects of trapping to a local minima. However, the proposed RVEGA which is similiar to the processes of natural evolution can optimize simultaneously the fuzzy rules and the parameters membership functions. The validity of this RVEGA based fuzzy controller was proved though applications to the stabilization problems of inverted pendulum system with strong nonlinear dynamics. The proposed RVEGA based fuzzy controller has a swing-up control mode(swing-up controller) and a stabilization one(stabilition controller), moves a pendulum in an initial natural stable equilibrium point and a cart in an arbitracy position, to an unstable equilibrium point and a center of the rail. The stabilization controller is composed of a double hierachial fuzzy inferred virtual equilibrium point. The experimental apparatus was implemented by DT-2801 board with A/D, D/A converter and PC-586 microprocessor.

UKF를 이용한 정전용량형 수동센서시스템의 파라메타 추정

김경엽,이준탁 東亞大學校附設 淸報技術硏究所 2006 情報技術硏究所論文誌 Vol.13 No.2

In this paper, a noisy passive telemetry sensor system using Unscented Kalman Filter (UKF) is proposed. To overcome these trouble problems such as a power limitation and a estimation complexity that the general passive telemetry sensor system IC chip has, the principle of inductive coupling was applied to the modelling of a passive telemetry sensor system (PTSS) and its noisy capacitive parameter was estimated by the UKF algorithm in time domain. Specially, to show the effective tracking performance of the UKF, we compared with the tracking performance of Recursive Least Square Estimation (RLSE) using linearization.

交流一直流 竝列送電系統의 定態安定度 解析에 관한 硏究

鄭亨煥,李浚析,金海在 동아대학교 공과대학 부설 한국자원개발연구소 1991 硏究報告 Vol.15 No.1

This paper mainly deals with the problems related to the improvememts of power system stability for an infinite bus-bar system with single machine, which AC and DC transmission line are connected in parallel. We considered about the stable operation region for the steady-state stability of power system with a DC current controller and without one. Specially, we assumed the general coefficients of converters in DC transmission line to be constant and obtained easily the stable limit curve in variations of gain coefficients for DC current controller through the digital computer simulation.