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조준식,이대영,김경찬,이지희 한국우주과학회 2010 Journal of Astronomy and Space Sciences Vol.27 No.3
In this paper we have investigated latitudinal variations of the poleward boundary of the nightside auroral oval when the magnetosphere is hit by an enhanced solar wind dynamic pressure front. We used precipitating particle data obtained from Defense Meteorological Satellite Program satellites to identify the locations of the boundary before and after enhanced pressure impacts. The boundary locations are represented by a parameter called “b5e”. After performing the analysis for a number of events, we found that the basic effect of the solar wind pressure increase impact is often (but not always) to move the poleward boundary of the nightside auroral oval poleward. However, this effect can be often modified by other factors, such as simultaneous variations of the interplanetary magnetic field with a pressure increase,and thus the boundary response is not necessarily a poleward shift in many cases. We demonstrate this with specific examples, and discuss other possible complicating factors.
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풍선확장술을 이용한 간내 잔류담석의 경피적 제거술 : Percutaneous Management with Balloon Dilatation and Stone Extraction
조준식,송창준 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.1
Recurrent pyogenic cholangitis is frequently relapsed with residual intrahepatic stones and biliary strictures after surgical treatment. Percutaneous removal of residual intrahepatic stones is an effective alternative for second operation which has a high mortality and morbidity. However, the successful extraction of intrahepatic stones may be difficult because of a high frequency of associated biliary strictures. We evaluated the effectiveness of percutaneous balloon dilatation in six patients who were difficult to extract residual intrahepatic stones due to biliary strictures. Balloon dilatation using angioplasty balloon catheter was performed via a T-tube tract. In four of six patients, balloon dilatation was successful and partially successful in two patients due to reccurence of stricture. Stone extraction was complete in three patients, incomplete in two patients, and failed in one patient. The reason of incomplete removal and failure were large sized stones and impacted stones in the intrahepatic ducts. There was no complication. In conclusion, percutaneous balloon dilatation is an effective procedure for extraction of residual intrahepatic stones associated with intrahepatic biliary strictures.
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조준식 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2
Percutaneous catheter drainage using a combination of US, CT and fluoroscopic guidance has become the treatment of choice for various abdominal abscesses and fluid collections. It is an important alternative to surgical treatment because of its high success rate, low mortality rate and low complication. The Author analyzed the results of percutaneous catheter drainage in 30 patients with abdominal abscesses and fluid collections at Chungnam National University Hospital from May 1986 to Aug. 1988. The results were as follows: 1. Successful drainage of the collection with avoidance of operation was achieved in 24/30 (80%) patients and partial success in 3 patients among 6 failures and recurrences 2. There were 2 failures and 4 recurrence and these were due to phlegmon, organized tissue, multiplicity, fistulae, or underlying tumor. 3. Comlication was minor in most cases 4. The overall, complete and partial success rate was 90%, failure rate was 6.7% and recurrent rate was 13.3%.
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하부요추의 facet관절의 정위 및 형태에 관한 전산화 단층 촬영소견 : 비대칭성 facet과 추간판탈출증과의 상관관계에 대하여
조준식 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2
The facet joints are parts of spinal motion segments and the range of motion in motion segment greatly depend on differences in orientation and shape of fact joints. The correlation between the asymmetry of facet joints and disc herination was studied with CT at the vertebral levels 4-L 5 and L 5 -S 1 in 56 cases with lower back pain and sciatica during period from April 1984 to Aug 1986. The result were as follows : 1. Thee mean value of the degree of facet angle at L4 -L5 was found to be 42.0±11.66° and 46.4±10.7° for left and right side, respectively. 2. The mean value of the degree of facet angle at L5-S1 was found to be 40.4±10.6° and 40.6±11.0° for left and right side, respectively. 3. The orientation and shape of facet joints at L4-L5 were more sagittally oriented any asymmetrically angled than facet joints at L5-S1. Righr facet joints at L4-L5 were more sagittally oriented than left facet joints. 4. The high correlation between asymmetry of facet joints and disc herination at L4-L5 was found but no significant correlation was found at L5-S1.
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