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Filtered-X LMS 알고리즘의 오동작에 관한 고찰
박병욱,김학윤 청주대학교 산업과학연구소 2000 産業科學硏究 Vol.18 No.1
The Filtered-X LMS(FXLMS) algorithm in active noise contol(ANC) requires to estimate the transfer characteristic between the output and the error signal of the adaptive canceler. The modeling errors, which secondary-path transfer function is not corresponded with modeling secondary-path exactly, affect convergence speed and adaptive filter coefficients. The adaptation of the adaptive filter coefficient has behaviors when modeling errors are occurred. Therefore, we study about convergence characteristics of the Filtered-X LMS algorithm when modeling errors are occurred.
AZO 투명전도막의 전기 광학적 특성에 미치는 PET 기판 표면처리 효과
박병욱,김지훈,성열문,추영배,곽동주 경성대학교 공학기술연구소 2008 공학기술연구지 Vol.15 No.-
In this paper aluminium-doped zinc oxide(ZnO:Al) conducting layer was deposited on polyethylene terephthalate(PET) substrate by r. f. magnetron sputtering method PET substrate was modified by a DBD(dielectric barrier discharge) plasma before sputtering to improve the electric and optical properties of ZnO:Al film and to increase also the deposition rate The effect of heat treatment time on the dectrical, optical, chemical and structural properties of ZnO:Al thin film were investigated experimentally The PET films modified with the DBD plasma showed a significant decrease in water contact angle The deposition rate of ZnO:Al film in the case of the plasma-treated substrate was also increased by around 2 times compared to the untreated substrate The minimum resistivity of about 28×10-3 Ω-cm and transmittance of about 83.3% were obtained under the experimental condition of 6min of heat treatment time.
박병욱 전남대학교 호남문화연구소 2002 호남학 Vol.31 No.-
The Bukhakpa (The school of Northern Studies) was the school that the emphasized the production and application of the institutions and devices concerning "tility and welfare." In such a point of view they paid attention to China, which they thought was an advanced country in those days. They meant to experience and identify all the institutions and devices in China and then have those suitable to our situation applied to our life. Thus most of the scholars in the school were eager for the journey to China, and had been there in practice. Though their journey to China was of diverse significance according to the individual situations and points of view, it had become a precious opportunity for them to justify their study in Joseon. As such, the journey to China became a critical opportunity for the scholars in the school of Northern Studies, which brought about the changes in their thoughts and actions. That is, before their journey to China, the scholars in the school were a group of scholars who were groping for the theoretical methodologies for the principle of Utility and Welfare, but after their journey, they had changed into the ones who tried to apply and practice in real life all the institutions and devices concerning Utility and Welfare that they experienced and identified during their journey to China. And for the change their experience in China had critical influence. However, what ought to be premised in the study of their journey to China is that the scholars had already been equipped with theoretical foundation to adopt principle of Utility and Welfare long before they had the journey. The journey itself was a practical result of the theoretical preparation. The book Yeon Haeng Rhok(A Record of the Journey to China), which had been written from the diverse points of view of diverse people, had great influence in many people. As a result, the book has played an important role in spreading the changed in the attitudes towards China and diverse activities concerning the principle of Utility and Welfare among the multitude of public.
박병욱,박요한,유선애,허영진,김성철,윤영주,Park, Byungwook,Park, Yohan,Yu, Sunae,Hur, Youngjin,Kim, Sungchul,Yun, Youngju 대한예방한의학회 2016 대한예방한의학회지 Vol.20 No.1
Objectives : The purpose of this study was to investigate the real status of the utilization of Korean medicine (KM) treatment among children with cerebral palsy (CP). Methods : In a prospective observational multicenter study for children with CP aged from 6 months to 78 months, we analyzed 69 questionnaires of children currently receiving or have received KM treatment such as acupuncture and Korean herbal medicine for CP. Results : Of all the 170 participants, 32 children was currently getting KM treatment and they were getting acupuncture therapy 2.5 times per week on average. The mean expenditure per month for acupuncture and herbal medicine was respectively 32,000won and 501,000won. 37 children have discontinued KM treatment. The most frequent reason for quitting acupuncture therapy was 'inconvenience' (40.7%), followed by 'suffering of children' (33.3%). The average duration of taking Korean herbal medicine was 3.78 months and the highest reason of stopping medicine was 'rejection of children' (32.3%), followed by the 'cost burden' (22.6%). 75% of currently KM using group answered they have experienced positive effect of KM and the rate was 48.6% among the group who have ceased KM. There was a significant difference between the two groups(p=0.025). Conclusions : Further study will be required to increase the therapeutic effect and utilization of KM among the children with CP. More efforts should be made to develop less invasive acupuncture method and various shape of KM herbal medicine and to expand the insurance coverage of KM for children with CP.
박병욱 호남대학교 1995 호남대학교 학술논문집 Vol.16 No.2
This paper proposes subjects to consider when GIS technique is introduced to effective management of underground facility. They are as follows : First, the scale of digital maps for underground facility management should be larger than 1/500. Second, accurate survey about actual facility condition must be carried out, in terms of enough time and cost, by facility location detectors. Third, surveying by total station or GPS equipment is adequate to aquire saptial information of underground facility which position determined by detectors. Finally, synthetic data management by exclusive department is necessary, and continuous management is very important.