가전산업의 고도화 전략

박주태,Park, Ju-Tae 한국전자정보통신산업진흥회 1990 電子振興 Vol.10 No.7

용접봉 생산 공장 근로자의 요통 발생밀도 및 위험요인

박주태,임현술 한국역학회 1999 Epidemiology and Health Vol.21 No.1

Fuzzy 推論을 이용한 文字認識에 관한 硏究

朴柱台 영남이공대학 1991 論文集 Vol.20 No.-

In this paper, an on-line recognition method for handwritten Hangeul is studied for the purpose of processing in real time and obtaining a high recognition rate. Three-point coding which extracts basic strokes from a character is employed to reduce the processing time, and relative position information between each stroke are mapped into fuzzy values in order to clove the ambiguities of analysing by three-point coding method and the differences of writing style among writers.

퇴행성 및 후외상성 슬관절염에 대한 연마관절성형술

박주태,안길영,민강우 대한슬관절학회 1998 대한슬관절학회지 Vol.10 No.1

Between Feb. 1992 and Apr, 1995, the authors have performed arthroscopic abrasion arthroplasty in 78 knees of 76 patients with degenerative osteoarthritis. The followup period was between 24 and 58 months, with on an average of 41 months. All patients had Zarins grade IV articular cartilage change. The results were as follows. 1. Of the total 78 knees, results were excellent in 25(32%), good in 33(42%), fair in 12(17%), poor in 8(10%) knees respectively. 2, The best results were obtained patellofemoral abrasion arthroplasty. 3. The poor results were obtained in patients with the both femoral condyle lesion. 4. The results were much better in young age group (below 40 years). Aroscopic abrasion arthroplasty is not a curative but palliative method. But it could be an appealing altemative to total knee arthroplasty or high tibial osteotomy or can be performed postoperated after these reconstructive procedures.

프레임 버퍼 액세스 대역폭 개선에 관한 연구

朴柱台,文相鎬 영남이공대학 산업기술연구소 1995 産業技術硏究 Vol.8 No.-

This paper introduces two schemes to improve frame buffer access bandwidth. First scheme suggests a rasterizer called SBUFRE that has Span Z and Span Z & Color Buffer within a rasterizer. Second scheme suggests a ZDRAM that has Z-value comparator within the DRAM. These schemes should improve approximately 50% frame buffer access bandwidth.

척추경 나사 고정술 후 발생하는 나사 주위 골흡수

박주태,Park, Ju-Tae 대한영상의학회 2003 대한영상의학회지 Vol.48 No.4

목적: 척추의 안정성을 유지시키기 위해 시행되는 척추경 (spinal pedicle)나사 고정술 (screw plate fixation)후 척추경 나사 주위에 생기는 골흡수의 빈도, 위치, 분포, 발생 시기, 골흡수의 진행 양상을 평가하고자 한다. 대상과 방법: 척추경 나사 고정술을 시행 받은 156명 환자의 902개 척추경 나사를 대상으로 수술 직후와 추적 관찰 기간 동안 척추경 나사 주위에 발생한 골흡수 여부를 분석하였다. 골흡수의 정도를 평가하기 위하여 방사선 투과성 부위 (radiolucent zone)의 폭을 측정하여 Grade 1(1 mm 미만), Grade 2(1 mm 이상 2 mm 미만), Grade 3(2 mm 이상)으로 등급화 하였다. 골흡수가 관찰된 39명의 78개의 척추경 고정 나사에서 골흡수의 정도, 위치, 분포, 발생 시기 및 진행 양상을 평가하였다. 결과: 척추경 나사 고정술을 시행받은 156명 902개의 척추경 중 39명(25%)환자의 78 개(8.6%)의 척추경에서 골흡수가 관찰되었다. 39명 중 26명에서 두 곳 이상의 척추경 고정 나사 주위에서 골흡수를 보였다. 척추경 고정 나사 중 99%에서 수술 후 12주 이내에 골흡수가 관찰되었다. 추적 기간 중 62%(78 개중 48개의 척추경 고정 나사)에서 병변의 정도는 진행하지 않았으나 38%에서는 더 높은 등급으로 골흡수의 정도가 진행하였다. 초기의 골흡수 등급이 낮은 경우에서 높은 등급으로 골흡수가 진행하는 정도가 낮았다. 결론: 척추경 나사 고정술 후 발생하는 나사 주위의 골흡수의 방사선학적 소견에 대한 이해는 수술 후 환자의 경과를 관찰하고 이해하는 데 도움이 될 것으로 기대한다. Purpose: To determine the frequency, level, distribution, onset, and pattern of progression of bone resorption that occurring around pedicle screws after pedicle screw plate fixation. Materials and Methods: Bone resorption around 902 pedicle screws was analyzed in post-operative, and follow-up radiographs obtained from 156 patients who underwent pedicle screw plate fixation. To determine the resorption degree, categorized arbitrarily as grade 1 (less than 1 mm), grade 2 (1 mm or more, but less than 2 mm), or grade 3 (2 mm or more), the width of radiolucent zones was measured. In 39 patients in whom resorption was graded 1, 2, or 3, the pattern of progression of 78 screws was evaluated. Results: Resorption occurred around 78 (8.6%) screws in 39 (25%) patients, 26 of whom had more than one lesion. For 99% of screws, there was evidance of resorption within 12 weeks of pedicle screw plate fixation. During follow-up, 61.5% of screws (48/78) remained stable, while 38.5% (30 screws) showed progression to higher grades. The possibility of progression to a higher grade is less when the initial grade is lower. Conclusion: An understanding of the radiographic patterns of bone resorption is useful for monitoring a patient after pedicle screw plate fixation.

복합 전도성 필러의 제작과 전자파 차폐 특성

박주태,박재성,도영수 대한전자공학회 2006 電子工學會論文誌 IE (Industry electronics) Vol.43 No.4

A series of conductive filler were prepared with electroless plating method. Base conductive materials of the filler were nickel and copper. The cores were prepared with Nylon 6 and rayon in different aspect ratio. Also, various complexes were made with ABS resin and conductive filler with different filler feed ratio. The conductivity of the filler was measured with conductivity analyzer and the size distributions of fillers was measured with laser particle size analyzer. Electromagnetic wave shielding efficiency of each complex film was measured with flange circular coaxial transmission line sample holder within the 1MHz1GHz bandwidth range. From this study, the conductivity of fillers surpass that of other carbon films. It is available that the filler made of fibrous materials can be applied in plastic molding industry of electric appliances as a EMI filler. 무전해 도금법을 이용하여 고분자섬유의 형태를 가진 전도성 필러를 제조하였다. 나일론 6과 레이온 섬유 분체에 니켈과 구리를 도금한 복합 전도성 필러를 제조하였다. 입도 분석기를 이용하여 필러의 입자크기분포를 측정하였으며, 전도성 필러의 전도성을 측정하기 위해 전도성 분석기를 이용하였으며, 본 연구의 전도성 필러와 유사한 용도로 사용되는 탄소섬유의 전도성을 측정하여 전도성의 차이점을 비교하였다. ABS 수지에 제조된 전도성 필러를 주입하여 필름을 만들어서 1MHz1GHz 주파수 대역에서 전자파 차폐 특성을 측정하였다. 제조된 전도성 필러가 첨가된 필름의 전자기파 차폐 특성을 측정하기 위하여 ASTM(D4935-89) 규격의 플랜지형 동축전송선 측정기구를 사용하였다. 제조된 전도성 필러는 기존의 탄소계 필러에 비해 전도성이 커서 전자파 차폐용 재료로 적합하였다.

마이크로파에 노출될 토끼의 MPE 추정을 위한 EEG 분석

박주태,이무영 한국통신학회 1996 韓國通信學會論文誌 Vol.21 No.4

The effect of electromagnetic wave on the biobody is to make a possibility not increasing temperature but also inducing physiological and psychological damage which is head or backbone. Generally a vital function of hean can be estimated by the measureing of Electro Encephalogram(EEG), and achieved a response of a find stimulus which can not be defected a subjective sympton and out of reaction. In this paper, the head can be modeled according to its medium and dervated the equation of SAR distritution, and the head of rabbit is approximately modeled three layers practically and the result of each SAR distribution is illustrated. Measured EEG from the nervous system of rabbit on a plane wave irradiated an be used quantitative analysis for the electrophysiogical effect of the biobody.

PMN-PT-PZ 계 세라믹스를 이용한 고지향성 음향변환기 제작

박주태,박재성,고영준 대한전자공학회 2004 電子工學會論文誌 IE (Industry electronics) Vol.41 No.03

Higher directivity acoustic transducer using the self-demodulation effect was fabricated. The dielectric and piezoelectric properties of 0.5 wt% MnO2 and NiO doped 0.1Pb(Mg1/3Nb2/3)O3-0.45PbTiO3-0.45PbZrO3 ceramics were investigated aiming at acoustic transducer applications. The structure of transducer was designed such as dimension and support type of the piezoelectric element, the vibrating metal plate, and the housing case. Based on the design, the transducer was fabricated and measured its acoustic characteristics. Also, AM modulated driving circuit was designed for using the self-demodulation effect. The piezoelectric sounder with 200kHz resonant frequency and 20kHz bandwidth was designed by considering the sharp directivity and the sound pressure. The design and fabrication method worked in this study can be utilized in development of various speakers with higher directivity and broader bandwidth. 자기복조현상을 이용한 고지향성 음향변화기를 제작하였다. 고유전율을 가지며 유전손실값이 작고, 기계적 품질계수값이 크며, 전기기계 결합의 에너지 변환효율이 높은 압전세라믹스를 제조하기 위하여 0.1Pb(Mg1/3Nb2/3)O3-0.45PbTiO3-0.45PbZrO3의 조성에 MnO2와 NiO를 각각 0.5wt% 첨가하였다..음향변환기의 구조는 압전세라믹스, 진동금속판 그리고 케이스의 의 치수와 지지방식을 고려하여 설계하였다. 제작된 음향번환기의 음향특성을 측정하였으며, 자기복조현상을 이용한 AM변조 구동회로를 설계 제작하였다. 첨예한 지향성과 음압을 고려하여 압전발음체는 200kHz의 고유진동수와 20kHz의 대역폭을 가지도록 설계하였다. 본 연구결과는 높은 지향성과 넓은 대역폭을 가지는 다양한 스피커 개발에 응용될 수 있다.

RC同調 中間周波 增幅回路의 設計

朴柱台,金承默 영남이공대학 1992 論文集 Vol.21 No.-

A tuned amplifier circuit, using no coil components, was designed and tested. The circuit, consisting of resistors, capacitors and few transistrors, successfully realized ideal frequency characteristics of conventional IA, tuned circuit and featured variable bandwidth, free from body effect and temperature independent. A double tuned circuit was also devided by cascadeing two single tuned amplifiers and its merits werw evaluated. Series of measuremwnts, conducted on the experimental circuit especially designed for 455khz IF amplifier, verified the analytical results and dependability of the design procedures developed by the author.