http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
요통 환자의 기립위 및 좌,우 외측굴곡시 방사선 사진을 통한 요추 회전변위 분석
허동석 ( Dong Seok Heo ),박석우 ( Seok Woo-park ),박영회 ( Young Hoi Park ),금동호 ( Dong Ho Keum ) 한방재활의학과학회 2003 한방재활의학과학회지 Vol.13 No.2
Objectives : Rotation on vertebra body is common reason causing low back pain and leg radiating pain patients. The present study investigated analysis of the radiological findings on lumbar vertebra rotation between erect position and erect both lateral bending position lumbar AP views in low back pain patients. Method : The study population consisted of 70 patients(outpatients and inpatients clinic of the Dept. of Oriental Rehabilitation Medicine, Dong-Guk Oriental Medical Hospital in Bundang) who were evaluated with X-ray findings of erect position and erect both lateral bending position lumbar AP views. First, patients were measured erect position lumbar AP views by Nash-Moe`s degree. Second, patients were measured erect both lateral bending position lumbar AP views by intervertebral disc space at convexity region and rotation on lumbar vertebral body. They divided into four groups by type of Grice and Cassidy`s classification. Results : 1. The distribution of sex in the low back pain with leg radiating pain was male 30(42.86%) cases, female 40(57.14%) cases. According to age, 30-40s 23(32.9%) cases, 40-50s 15(21.4%) cases, 20-30s 13(18.6%) cases, 50-60s 9(12.9%) cases, 60-70s 5(7.1%) cases, 70-80s 3(4.3%) cases, each 10-20s and 80-90s one case (1.4%). 2. According to Nash-Moe`s degree by erect position lumbar AP view, the grade 0 was male 8(11.4%) cases, female 10(14.3%) cases, the grade Ⅰ was male 17(24.3%) cases, female 22(31.4%) cases, the grade Ⅱ was male 5(7.1%) cases, female 8(11.4%) cases. 3. According to symptoms, first, patients with low back pain were male 22(31.4%) cases, female 20(28.6%) cases. second, patients with leg radiating pain were male 8(11.4%) cases, female 20(28.6%) cases. 4. According to type of Grice and Cassidy`s classification by erect both lateral bending position lumbar AP views, the type Ⅰ was normal group 7(10.0%) cases, the type Ⅲ and Ⅳ were abnormal group each 15(21.4%) cases, 48(68.6%) cases. 5. According to abnormal group in Nash-Moe`s degree by erect position lumbar AP view, the grade Ⅰ was 39(55.7%) cases and then abnormal type Ⅲ, Ⅳ of Grice and Cassidy`s classification were 5(7.1%) cases, 33(47.1%) cases, the grade Ⅱ was 13(18.6%) cases and then abnormal type Ⅲ, Ⅳ of Grice and Cassidy`s classification were 1(1.4%) case, 12(7.1%) cases. So the relationship between rotation of vertebra by erect position lumbar AP view and type of Grice and Cassidy`s classification by erect both lateral bending position lumbar AP views had significant correction(p<0.05). 3 6. According to analysis of symptoms and X-ray findings by erect both lateral bending position at convexity region, patients with leg radiating pain were 28 cases. In the total of 28 cases, 25 cases had shown rotation of vertebra and intervertebra disc space narrowed at convexity region, while 3 cases didn`t have shown. 7. According to abnormal rotation of vertebral body on erect position, the number of group L4 was 48(32.7%) cases the most, group L3 was 43(29.3%) cases, the next group L2 was 30(20.4%) cases. Group L4, L3, L2 had significantly connection with fixation group on erect both lateral bending position(p<0.05). Conclusions : We concluded that the abnormal rotation of lumbar vertebral body had connection with the low back pain and leg radiating pain patients. So we must regard functional X-ray such as erect both lateral bending position lumbar AP views to early find cause.
Scanning Tunneling Microscope(STM)의 제작
김동식,정회환,정관수 慶熙大學校 材料科學技術硏究所 1993 材料科學技術硏究論集 Vol.6 No.-
In this paper, we have designed and constructed a scanning tunneling microscope(STM) for studying on the atomic scale strucure of semiconductor surfaces We considered next four points. Firstly, we used triple spring damping system for stable measurement. Secondly, we soldered electronic part on PCB board to minimize electronic noise. Thirdly, we made stable power supply part to reduce drift power noise. Fourthly, stainless steel 302 was used for future UHV experiment. In operating the STM, we could eliminate the effect of external vibration by adopting the triple spring damping system. Noise of 60 Hz which was generated by wire connection between electronic and mechanical part, was eliminated by drying the silver paste thoroughly. Tip voltage was biased by 10mV We have obtained clear images of HOPG(high oriented pyrolitic graphite) when tunneling current was 2nA. In conclusion, we have confirmed that our STM have a resolution of atomic scale by investigation of the image of HOPG surface.
서동연,이경회 대한건축학회 2003 대한건축학회논문집 Vol.19 No.12
Perceiving a shape is to capture prominent elements of an object. To humans, a few selected signs are not only sufficient for identification but also determine the impression of the objects. In this respect, CAAD system should recognize architectural form in the same way of human to support aesthetic ability of designers and users. Through the analysis of visual perception, vision was separated to low-level vision and high-level vision. Edge detection and neural network were selected to model after low-level vision and high-level vision. The 24 images of building, tree and landscape were processed by edge detection and trained by neural network. And 24 new images were used to test trained network. The test shows that trained network gives right perception result toward each images with low error rate. This study is on the meaning of artificial intelligence in design process rather than on the design automation strategy through artificial intelligence.