Alginate 배양내에서 Transglutaminase가 연골막세포에 미치는 영향

박정선,공차배,김충현,안현정,정미현,성상철,김희중,조현철,이상훈,이명철 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

혈관성 파킨슨증의 경사에코 자기공명촬영 소견 : 환자-대조군 연구 A Case-Control Study

배희준,김병건,구자성,김현숙 대한치매학회 2002 Dementia and Neurocognitive Disorders Vol.1 No.2

Background & objective : Changes of signal intensity in the various Structures of basal ganglia(BG), Which can be detected by gradient echo MRI(GE-MRI). have been reported in different kinds of parkinsonism Altered iron content in these structures may be a possible explanation of above phenomenon Vascular parkinsonism is a kind of parkinsonism syndrome and is common However. There have been no reports about the BG signal changes on GE-MRI in vascular parkinsonism Methods : We investigated the difference of signal intensity in various BG and midbrain structures between 36 patients with vascular parkinsonism. which was defined as clinical parkinsonism+evidence of relevant vascular lesion on MRI+poor or no response to levodopa, and age-& sex- matched controls. The intensity of BG on GE-MRI was graded as 0-3 relative to cortical gray matter Results : There were no significant differences in clinical characteristics between two groups Among patients with vascular parkinsonism, hypointensity was observed in globus pallidus in 94.4%. in putamen in 58.3% in head of caudate in 33.3%, in substantia nigra in 72.2%,& in red nucleus in 52.8% There was no significant linear trend in the association between signal intensity of above structures and the presence of vascular parkinsonism (p>0 05 on Mantel-Haenszel chi-square test) However, the correlation between the degree of white matter lesions and the presence of vascular parkinsonism was statistically significant (p=003). Conclusions : Our GE-MRI study fails to prove that iron content of various BG structures in patients with vascular parkinsonism is different from controls.

입력성형기법을 이용한 변위증폭형 마이크로스테이지 잔류진동제어

배규현,송은혜,강중옥,홍성욱 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

This paper presents a result of application of input shaping to a micro-stage with a displacement amplification mechanism. The stage considered in this study is subjected to severe residual vibration in its lever mechanism to amplify displacement. The system dynamics exhibit some nonlinear nature due to the hysteresis of the PZT actuator. Input shaping method is successfully applied to the system so as to eliminate residual vibration from the system. The experimental study also shows that staircase input is useful to avoid the performance degrade by the nonlinear characteristics.

Streaming SIMD Extension(SSE)에 적합한 영상 압축 방식에 대한 연구

배현성,정익주 강원대학교 정보통신연구소 2003 정보통신논문지 Vol.7 No.-

The objective of this paper is to present the new FourCC to use the power of general CPU, to the highest degree, supporting SIMD that is being used the most. This is the form that can be applied to all the picture processing compressed by block. The most ideal form is that the used data is in cache memories of CPU. But the video needs very big memories, so there is little probabilily that the data is in the cache memories. If FourCC suggested in this paper is used, there is always the data in the cache memories. Also, it means that this form can receive profits very much in terms of speed. This paper has simulation using DCT-based vision compression that is the most typical form coding based on block segmentation. We can recognize that the speed improves through this simulation.

체성분이 폐경 전후 여성의 골밀도에 미치는 여향

배성욱,남철현,신두만,차경미,서인선 慶山大學校 保健福祉硏究所 2002 保健福祉硏究 Vol.7 No.-

Objectives : To evaluate the degree of bone mineral density and prevalence rate of osteoporosis according to age and to search the preventive strategy for osteoporosis, the factors that affect on bone density were studied in Physical Characteristics of pre- and postmenopausal women in korea. Methods : The subjects were 961 premenopausal and 1,167 postmenopausal women who have examined in health promotion center of Yeungnam University Hospital in Daegu city from January, 1999 to January, 2001. The test for bone mineral density, biochemical factors, and body composition were done. Results : 1) The prevalence rates of reduced bone mineral density and osteoporosis in premenopausal women were 23.8% and 1.6%, respectively. However, these values were increased to 46.1% and 28.1% in postmenopausal women. 2) The body weight and height were important predictive factors for bone mineral density. The effects of age, body weight, and height on bone mineral density were 39%. The body weight was correlated statistically significantly with bone mineral density in pre- and postmenopausal women. The higher body mass index (BMI), the greater value of bone mineral density was revealed in pre- and postmenopausal women. 3) The correlation between body composition adjusted for body weight and bone mineral density revealed similar pattern between pre- and postmenopausal women. The height, lean body mass, muscle mass, mineral content, and mineral fraction were positively correlated with bone mineral density, however, body fat mass, percent body fat, waist/hip ratio, and BMI were correlated negatively with bone mineral density. 4) There was no direct correlation between cardiovascular risk factor and bone mineral density in this study, however, further study is needed because cardiovascular disease and osteoporosis have common risk factor and the prevention of osteoporosis can help to prevent cardiovascular disease. 5) In multiple regression analysis among bone mineral density as a dependent variable and independent variables (age, body weight, height, Ca/creatinine ratio, and alkaline phosphatase (ALP)), ALP revealed statistically significant inverse correlation with bone mineral density. Conclusions : These results suggested that to prevent osteoporosis, the systemized program including physical condition for promoting anti-osteoporotic factor have to be developed and apply from the thirties whom have maximal bone mineral density.

비파괴적 분석법을 활용한 활음진 함유 에멀젼의 인체효능평가

배지현,안성연,이해광,안순애,문성준,장이섭 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-

최근 한방화장품이 각광을 받으면서 한방에서 말하는 피부개선효과에 대한 적절한 평가법을 찾는 연구가 많이 수행되고 있다. 본 연구에서는 피부 항산화 효과가 우수한 산사자, 당귀, 홍화, 두충, 숙지황의 초임계추출물 (활음진, 活陰眞)의 혈액순환 개선효과를 적외선 열화상 이미지 분석 및 LaserDoppler Perfusion Imager를 이용한 분석을 통해 평가하였다. 평소 손발이 차가운 여성 11명을 대상으로 활음진을 포함한 에멀젼을 1주일간 도포하게 하였으며, 도포전과 1주일간 사용한 후 피부 온도와 혈류량을 비교하였다. 그 결과 얼굴의 피부 온도가 증가하였고, 이마, 눈위, 뺨정면 부위에서 시료 사용 후 유의한 증가를 보였다. 본 연구를 통하여 활음진 성분을 포함한 에멀젼의 혈액순환 개선효과를 확인하였을 뿐만 아니라 한방적 접근을 통한 피부개선효과를 평가하는데 적절한 실험모델을 수립하였다.

상심실성 빈맥환자에서 관상정맥동의 형태비교

현대우,김윤년,박소영,한성욱,허승호,김기식,김권배 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.4

폐경 전후 여성의 신체활동 및 생활습관과 골 밀도 수치와의 관련성

배성욱,남철현,홍성철,최연희,이정옥,양숙희 대한보건협회 2002 대한보건연구 Vol.28 No.3

To evaluate the degree of bone mineral density according to physical activity, lifestyle in pre- and postmenopausal women. The subjects were 951 premenopausal and 1,167 postmenopausal women who have examined in health promotion center of Yeungnam University Hospital in Daegu city from January, 1999 to Januaty, 2001. The test for bone mineral density. The physical activity and life style were evaluated by questionaire through interview. The results were summarized as follow. 1) The prevalence rates of reduced bone mineral density and osteoporosis in premenopausal women were 23.8% and 1.6%, respectively. However, these values were increased to 46.1% and 28.1% in postmenopausal women. 2) The regular exercise was revealed to have preventive effect for osteoporosis in pre- and postmenopausal women. Among the types of exercise, the most effective exercise was bowling and moderately effective exercise was swimming on prevention of osteoporosis, however, bare hand physical exercise was not significant effect on bone mineral density. 3) The risk for reducing bone mineral density was decreased in women who have higher educational background and income in pre- and postmenopausal. The bone mineral density was highest in white color worker and lowest in blue color worker. 4) The premenopausal women who favor meat were revealed higher bone mineral density than the women who favor vegetable. The women who have drunk none or small amount of alcohol were revealed increased bone mineral density and smoking was a risk factor for osteoporosis. These results suggested that to prevent osteoporosis, the systemized program for promoting anti-osteoporotic factor have to be developed and apply from the thirties whom have maximal bone mineral density.

정자기장과 맥동전자기장이 MC3T3-E1 세포의 ALP 및 DNA 활성도에 미치는 영향

배성민,성재현,손정희 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.4

정자기장과 맥동전자기장이 배양 조골세포에 미치는 영향을 알아보고자 MC3T3-E1세포를 각 자기장하에서 배양하여 ALP활성도와 DNA의 합성능을 평가한 결과 다음과 같은 결과를 얻었다. 1. 정자기장을 가한 군에서 자석을 1,2,3개 가한 군(51~114.8mT)에서 대조군에 비하여 ALP의 유의성있는 증가가 나타났으며(p<0.05), 자석을 4개, 5개 가한 군(150mT)에서는 대조군에 비하여 ALP활성도에 차이가 나타나지 않았다. 2. 맥동성 전자기장에서는 대조군에 비하여 ALP활성도에 유의한 차이가 나타나지 않았다. 3. DNA합성능은 정자기장과 맥동성 전자기장을 가한 군 모두 대조군에 비하여 유의한 차이가 나타나지 않았다. 이상의 결과 정자기장에 의한 교정력은 골세포의 대사과정에 변화를 줄 수 있으므로, 치아이동에 어떠한 영향을 줄 수 있을 것으로 사료된다. The purpose of this study was to evaluate the effect of magnetic field on cellular activity of MC3T3-E1 cells. The celular activity was monitored by alkaline phosphatase and DNA synthetic activity in control, static magnetic field and pulsed electromagnetic field groups. A static magnetic field and pulsed electromagnetic field groups. A static magnetic field was applied to the cell by placing one, two, three, foue, and five samarium-cobalt magnets above and below each cell plate for 24hours per day. A pulsed electromagnetic field with a frequency of 100 herz was applied for 10 hours per day. After 10 days of magnetic field exposure, there were increase of alkaline phosphatase activity in static magnetic field groups consisted of one, two and three magnetic groups. Alkaline phosphaatase activities were not significant increase in alkaline phosphatase activity compared to control. DNA synthetic activity in both static and pulsed electromagnetic field group were not significantly different from that in control group. The result of this study suggest that magnetic field could have effect on the metabolism of bone cells related to the cellular metabolic process.

크레인 정밀 정지위치결정을 위한 입력성형기법 개선

배규현,홍성욱,박상원 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

Input shaping is widely accepted to be a useful tool for removing residual vibration in cranes. The UMZV(unity magnitude zero vibration) input shaper is often employed for cranes driven by on-off type motors. However, the UMZV input shaper makes the cranes move slightly further than expected from the original command while it can remove the residual vibration out of the cranes. This paper deals with a method of input shaping scheme which can compensate the position inaccuracy as well as remove the residual vibration of cranes. The proposed method is illustrated through a numerical simulation.