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근전도 바이오피이드백을 이용한 불안장애 환자 및 정상인의 근육긴장도에 관한 비교연구
정도언,이주호 大韓神經精神醫學會 1987 신경정신의학 Vol.26 No.2
For the purpose of comparing muscle tension level and muscle relaxibility between anxiety disorder patients and normal controls, frontalis EMG levels of 28 anxiety disorder patients (male 14, female 14) and 40 normal controls (male 22, female 18)were measured. The results were as follows: 1) The mean value of EMG basal levels of the anxiety disorder group were 2.38㎶ for male and 2.89㎶ for female, which did not prove to be significantly different from those in the control group (1.77㎶ for male and 3.17㎶ for female). 2) In both male and female groups, anxiety disorder patients and normal controls were significantly different from each other in the mean EMG level on relaxation trial and this was consistent with the findings by the analysis of covariance. The result suggested that muscle relaxibility of the anxiety disorder group was significantly lower than that of the normal control group. 3) In 36% of anxiety disorder patient, paradoxical rise of the muscle tension above the basal(resting) level was noted on relaxation trial.
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릴레이 궤환을 이용한 PID제어기 상수의 자동 조정에 관한 연구
金恩培,南炫道,李坰鎭 단국대학교 1990 論文集 Vol.24 No.-
In this paper, Auto-tuning methods for parameter tuning of the PID controller is proposed. The existing methods of parameter tuning rules is compared with the proposed method, and the simple robust estimation technique is introduced. The tuning procedure is as follows : The relay feedback loop are added to the system to obtain the critical gain and critical period. Then appropriate test signal is generated automatically using the relay control, the controller parameter is calculated by using the Ziegler-Nichols parameter setting rule. Also the sensitivity on error and noise are reduced by using the hysteresis characteristic of relay, and the controller for the time-varying system is presented using the resetting of the PID parameters in case that the sum of errors is greater than the dead zone.
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소아정신과에 내원한 경련성질환 아동 및 청소년에 관한 연구
정도언 大韓神經精神醫學會 1985 신경정신의학 Vol.24 No.2
국립서울정신병원 소아정신과 외래에서 5년 7개월간에 진료받은 경련성질환 아동 및 청소년 총 114명에 대해 병록지조사법으로 연구후 다음과 같은 결론을 얻었다. 1. 연구대상 114명은 동일기간의 소아정신과 외래환자 총 650명의 17.5%를 차지해 경련성질환 진료가 소아정신과 외래에서 큰 비중을 차지하고 있음을 알 수 있었다. 2. 경련발작 외에 행동, 사회성, 정서 및 학습제반에 걸쳐서 다양한 장애를 보였으나 외래에서 시행한 주된 치료는 약물요법이었다. 3. 약물요법에서 초진직후부터 두가지 이상의 항경련제를 투여한 경우가 전체의 62.3%였으며 단독약물요법이 32.5%로 항경련제의 일반적 사용원칙에 위배되는 경우가 60%이상으로 초기나 중기 발달 단계에 있는 아동이나 청소년에게서 장애를 초래할 가능성을 배제할수 없었다. 4. 항경련제 투여후 행동이나 정서의 장애를 나타낸 예에서는 공통적으로 phenobarbital 이나 primidone을 투여 받고 있었기에 그 약리작용에 의해 행동이나 정서의 변화가 온 것으로 판단되었으며 그런 경우 맹목적인 항정신약물 투여보다는 항경련제의 대체가 바람직할 것으로 생각된다. 소아나 청소년의 경련성질환은 그 시기로 보아 발달상의 위기로 받아들여져야 하고 경련발작 자체의 약물치료에만 치중할 것이 아니라 그 환아의 행동, 정서, 인지, 학습 및 사회성 등 제반 발달이 정상적으로 이루어지도록 포괄적 치료가 시행되어야 한다. 이를 위해서는 정신과의사의 역할이 중요하며 경련성질환을 단순히 신경질환이라는 입장보다는 행동과학적 입장에서 다루어야 할것이다. 114 subjects (children and adolescents) with convulsive disorder were studied retrospectively, based on their medical records. They constituted 17.5% of the total child psychiatry outpatients seen for 5 years and 7 months. Besides the seizure attacks, various kinds of conduct, emotional, social and learning disturbances were reported, however, the treatment done in the outpatient clinic was exclusively drug therapyoriented. In anticonvulsant drug therapy, more than two kinds of anticonvulsants were prescribed in 62.3% of the study subjects. Especially in children and adolescents, it may affect the ongoing normal developmental processes adversely. While on treatment with anticonvulsants, 19 subjects were reported to develop some hyperkinetic behavior, personality change, destructive behavior and memory impairment. In most cases, it was estimated to be the effect of phenobarbital and/or primidone commonly administered to them. Antipsychotic drugs were prescribed to some of them to control the conduct problems but it is somewhat undesirable due to the antipsychotics' potential action to lower the seizure threshold and to cause tardive dyskinesia if used on a long term basis. Rather, it is recommended that the suspected anticonvulsant be substituted. Convulsive disorders in children or adolescents should be regarded as a 'developmental crisis' and they should be treated comprehensively, not in terms of a simple neurological disorder. Normal developmental progress should be fully encouraged.
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金恩培,南炫道 단국대학교 1985 論文集 Vol.19 No.-
The most widely used concept in applications of random signal is the power spectrum. This concept is central in system theory, optics, spectroscopy, oil exploration, earthquake analysis and many other area. In such applications, a common problem is the estimation of the spectrum in terms of given data. The signal can be modeled by ARMA model. Using this model, spectral estimation problem can be reduced to estimate the ARMA coefficients and order determination problem. The order determination techniques, such as singularity test and Gram-Schmidt orthonormalization are presented. And numerical performance is improved by using normalized correlation coefficients. Extended least squares method with boot strapping procedure for ARMA spectral estimation is also presented. By using lattice structure, this method improves hardware implementation and provides an efficient computational procedure for performing adaptive processing. Finally, Computer simulations are presented to illustrate above methods
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