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원자로 Stud Bolt 의 결함검출을 위한 초음파 신호처리 기법개발
오원덕,이준현,최상우,박문호,조윤호 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-
Bolt failure is a hazard factor for the safety of reactor vessels in nuclear power plants. However, in the practical application of ultrasonic technique for crack detection in stud bolt, the classification of crack signal from the signals reflected from threads in stud bolt is very difficult. In this study, shadow effect technique combined with new signal processing method has been investigated to enhance the detectability of small crack initiated from root of thread in stud bolt. The key idea of new signal processing concept is based on the fact that the shape of waveforms from the threads is uniform since the shape of the threads in a bolt is same. If some cracks exist in the thread, the flaw signals are different from the reference signals. It has shown that the small flaws can be effectively detected by novel ultrasonic technique combined with this new signal processing concept.
MPEG-2 비디오 디코더(MP@HL)의 상위 레벨 설계에 관한 연구
박준호,오주환,천성권 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(A)
In this paper, high level of MPEG-2 video MP@HL decoder is designed and follows ISO/IEC 13818-2 standard specification. MPEG-2 video decoder consists of system processign board, slice processign board, and motion processing board, which is compatible with MPEG-TS and MPEG layer-2. Each board represents schematic level design and external interface.
박준호,오주환 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(A)
In this paper, as a performance analysis of parallel processing, a static data flow model and a Von Neumann model is used. Simulations are performed and the results are analyzed. The CPI and MIPS are used to analyze the performance of two models at a real time speed. In general, Von Neumann models make well use of locality, but data-flow models have overheads that are due to producing token and no use of locality.
박준호,백혜숙,오주환 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
전자 디지털 컴퓨터가 발명된 지 40년 여년이 지났고 현재의 컴퓨터는 모든 기능을 그래픽 환경에서 구현하고 있으며, 여러 가지 부가적인 기능을 가지고 있다. 초기의 수치계산에 치우쳤던 컴퓨터의 기능은 지금은 많은 멀티미디어 기능을 내장하고 있다. 수치계산에서 문서화 작업, 자동제어, 음악, 그림에 이르기까지 앞으로의 용도를 예측하기 어려울 정도다. 처음에는 영어 철자나 기호 등을 이용해 점자같은 처리를 했던 그래픽이 지금은 모든 것을 표현하는 완벽한 예술의 도구로 자리잡았다. 기존의 이미지 뷰어에서는 정영상과 동영상에 별도의 틀이 있었지만, 통합 환경은 없었다. 본 논문에서는 다양한 포맷의 디스플레이, 확대, 축소, 프린트 기능과 동영상을 디스플레이할 수 있는 통합 환경을 구현하였다.
외과계 감염증에 대한 Sulperazon(Sulbactam/cefoperazone) 및 Cefoperazone의 임상효과 비교연구
박규주,노동영,김상준,권오중,정중기,홍인규 대한화학요법학회 1990 대한화학요법학회지 Vol.8 No.2
Despite recent advances in development of antibiotics and antiseptic techniques, infection still remains to be one of the major problems in the surgical field. Due to development of bacterial resistance to commonly used antibiotics, there is always a need to develop a new antimicrobial agent which would overcome such resistance. Sulperazon (Sulbactam/Cefoperazone) is a combination drug of potent β-lactamase inhigitor, sulbactam, and cefoperazone which has broad antibacterial spectrum, which was developed to combat against β-lactamase producing microorganisms. In an effort to evaluate the efficacy and safety of sulperazone, we have randomly divided 40 patients (12 with perforated appendicitis, 10 with peritionitis, 6 with GB empyema, 6 with periproctal abscess, 3 with wound infection, 1 liver abscess, 1 pancreatic abscess, and 1 acute cholangitis) into 2 groups (20 patients in each group). One group received daily dose of 2 to 3 grams of sulperazon and the other group received daily dose of 2 to 3 grams of cefoperazone. Following results were obtained : 1. Clinical effect of sulperazon was cure in 16 patients (80%), improvement in 3 patients (15%), compaired to cure in 14 patients (70%), improvement in 4 patients (20%) for the cefoperazone group. 2. Using disc diffusion method, sulperazon was sensitive to all of the isolated microorganisms except β-hemolytic streptococci, which was moderately sensitive. Cefoperazone was sensitive to only E. coli, Pseudomonas aeruginosa and Serratia. 3. Microbiological effect of sulperazon was eradication of offending microorganisms in 16 patients (80%), compared to 14 patients (70%) in Cefoperazone group. 4. Overall clinical efficacy of sulperazon was 95%, compared to 80% for cefoperazone. 5. Adverse effects due to sulperazon was nausea and diarrhea which occurred in 1 patient respectively. 2 patients receiving cefoperazone experienced diarrhea. It can be concluded that sulperazon is a safe and effective antibiotic agent which can be used in surgical infection patients.
이종마찰압접재 계면의 기계·금속조직학적 거동 및 파면특성 : STS304와 SM15C재를 중심으로 For STS304 and SM15C
오환섭,박경식,박준건,오정국,백영남 慶熙大學校 材料科學技術硏究所 1998 材料科學技術硏究論集 Vol.11 No.-
In this study is behavior of crack propagation and fracture under static tensile load, shear load, rotary bending fatigue load in friction welded dissimilar materials. Crack was observed in fine ferrite zone of SM15C and heat affected zone of STS304. Plastic flow was occured by friction welding process, so direction of crack is inclined with welded surface. Fatigue fracture most occurred in SM15C heat affected zone around interface. Fibrous zone with the view of macroscope and dimple pattern with the view of microscope were observed at fracture surface. Result is more metal micrstructure dependence than stress dependence by mechanical and metallic mechanics.
오준석,박상주 龍仁大學校 體育科學硏究所 2003 體育科學硏究論叢 Vol.13 No.2
The purpose of this study was to investigate the effects of the value types for sport consumption on life satisfaction. To attain the purpose, the value types for sport consumption were divided into value in use, value in exchange and value in discrepancy based on needs of consumption. Life satisfaction was also divided affection, unification, attainment, the sense of self, optimistic attitude to past, present and future life. The subjects of this study were 450 men and women over twenties that do sports activities at sport center in Seoul city. The 393 collected questionnaires held validity. Among 450 questionnaires, 57 insincere questionnaires were ruled out. Also, trust degree of these collected questionnaires was verified by Cronbach's α, and trust degree of the value types for sport consumption were .7648, trust degree of life satisfaction was .7541. These numerical value meant satisfactory trust degree. Through SPSS Win 11.0 for analyzing these data, t-test, One-way ANOVA, LSD post-verification, Correlation and Multiple linear regression analysis were used as statistics techniques. All statistical data were tested with p<.05. The findings of this study were as follows: 1. There were statistically meaningful differences at 5% level in the value types for sport consumption. Especially the value types for sport Consumption with sex showed meaningful difference in value in discrepancy. Also the value types for sport consumption with age showed difference in value in exchange and sport participation term shows difference in value in use. 2. There were statistically meaningful differences at 5% level in life satisfaction. Especially life satisfaction with income showed difference in attainment and the sense of self, life-satisfaction with occupation showed difference in the sense of self and optimistic attitude. Also sport participation term showed difference in attainment. 3. There was a positive correlation of value in exchange, value in use and value in discrepancy in order between the value types for sport consumption and the affection to lie. 4. There was a negative correlation of value in exchange, value in discrepancy in order between the value types for sport consumption and the attainment. 5. There was a positive correlation of value in use between the value types for sport consumption and the attainment. 6. There was a positive correlation of value in use between the value types for sport consumption and the sense of self. 7. There was no correlation of value in use, value in exchange and value in discrepancy between the value types for sport consumption and the optimistic attitude.