비파열성 뇌동맥류의 수술과 연관된 합병증

구희상,강성돈 원광대학교 의과학연구소 2009 圓光醫科學 Vol.24 No.1

비파열성 뇌내 동맥류의 크기, 위치, 환자의 나이에 따라 치료결정에 대한 논란이 많으나 적극적인 치료가 증가 추세이다. 문헌상 파열성 뇌내 동맥류보다 수술 합병증의 빈도는 덜하지만, 새로운 뇌경색이나 수술 부위와 떨어진 소뇌의 출혈과 같은 예기치 못한 합병증이 보고되고 있다. 비파열성 뇌내 동맥류는 수술 전에 증상이 없거나 심각하지 않으므로 수술이 더 용이하다고 해서 쉽게 생각하는 것은 절대 금물이고, 보호자에서 충분한 사전 설명과 함께 위험성과 효율과의 비율을 정확히 고려해야 할 것이다. Background: With advances in neuroimaging, unruptured cerebral aneurysms are being diagnosed more frequently. Surgery is warranted if surgical risk are less than the risk of natural history. In this study, we investigated the surgery related complications and its prognosis after clipping of unruptured cerebral aneurysms. Methods: The study consists of a retrospective review of 100 patients who underwent surgery performed by one surgeon for 110 unruptured aneurysms between January, 1990 and December, 2006. One hundred and two aneurysms(92.7%) were successfully clipped, and 8(6.4%) were either wapped or trapped. The clinical outcomes were evaluated in each patient by the Glasgow Outcome Scale at discharge. Results: Thirty(30%) of the patients were asymptomatic, while the remainder(70%) had various symptoms. Regarding the aneurysmal size, 4(3.6%) were giant aneurysms, and 88(80%) were small aneurysms less than 10mm in diameter. The location of the aneurysms were internal carotid artery, middle cerebral artery, anterior cerebral artery in order of frequency. Ninety eight patients recovered without any neurological deficits. A procedure-related surgical complication was diagnosed in 2 cases(2%). Complications included hemiparesis(moderately disabled) following cerebral infarction. Conclusion: The morbidity rate associated with treating unruptured aneurysms is not negligible with increasing trend of active management decision in patients with unruptured aneurysms. Treatment requires accurate assessment of the risk/benefit ratio considering natural history of the disease, and unpredictable complication ratio should be closely monitored.

조혈모세포이식술이 골수기질세포의 기원 및 조골세포로의 증식 및 분화에 미치는 효과

강무일,조성원,오은숙,백기현,이원영,오기원,김혜수,한제호,윤건호,차봉연,이광우,손호영,강성구,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

철강산업의 국제경쟁력에 관한 연구

구종순,조성원,강신원 충남대학교 경상대학부설 경영경제연구소 1998 경영논집 Vol.14 No.1

고성장산업인 철강산업은 그 발전의 정도에 의해 국가경쟁력의 우위를 판가름하는 하나의 기준이 될 것이다. 본고는 우리나라 철강산업의 국제경쟁력을 무역특화지수, RCA지수, 총요소생산성등 세가지를 사용하여 경쟁력을 파악하고 동산업에 대한 경쟁력 제고방안을 살펴보았다. 분석결과 철강산업의 경쟁력은 1992-3년을 기준으로 급속히 악화되고 있는 것으로 분석되었다. 따라서 경쟁력 제고를 위해서는 첫째, 수요변화와 고부가가치상품을 생산하기 위한 기술개발 및 경쟁력을 확보해야 한다. 둘째, 효율적 생산확대 및 수출진흥정책을 통하여 철강산업의 성장 및 경쟁력제고를 유도해야 한다. 셋째, 철강기업을은 자원의 재활용 비중을 높여 생산비용 절감 및 국제환경기준에 대비하여 앞으로의 경쟁력을 확보하여야 할 것이다. 넷째, 급변하는 국내외적 경영환경에 능동적으로 대처할 수 있도록 건실한 재무구조를 구축하여야 한다.

레이저 박피술의 피부면적 감소효과와 레이저 punch out 병변의 치유에 대한 실험적 연구

강동희,윤을식,구상환,안덕선,박승하 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

An experimental study was designed to analyze the surface reduction effect of ultrapulse carbon dioxide laser on the skin of guinea pigs receiving laser resurfacing. Two squares of skin measuring 3x3 ㎠ were designed on each side of the abdomen of guinea pigs(n=10). Five animals received laser resurfacing on their abdomen at energy of 250mJ/5 watt, and five other animals received 500 mJ/5 watt. On each animal, the left side square was treated with one pass of a CO2 laser, and the right side q=square was treated with two passes using a C.P.G. scanner. The size of the resurfacing area was determined by celluloid overlays at 1,2,3,4 and 6 weeks. Immediately following laser resurfacing, the area was decreased to 69%(left side) and 56%(right side) of the designed area in the 250 mJ/5 watt group, and 59% and 40% in the 500mJ/5 watt group. After 6 weeks, the resurfaced area had been reduced to 70% and 56% of the designed area in the 250mJ/5 watt group, and 60% and 40% in the 500mJ/5 watt group. As a result, the effect of surface reduction by CO2 laser resurfacing increased at a higher power and when more passes of the ultrapulse carbon dioxide laser were applied. The laser treated skin continued to maintain its contracted dimensions. These findings suggest that ultrapulse carbon dioxide laser may be an effective treatment method for rhytides. Another experiment was performed on multiple punch-out lesions on guinea pig skin(n=2) with 1,2,3 mm collimated hand pieces for the purpose of determining a new laser treatment method. After 4 weeks, on gross and histological examination, there were no differences in the healing of multiple punch-out lesions and the healing of punch-out lesions was complete without any scarring. These findings suggest that the laser punch-out method can be used for the treatment of acne scars.

한국의 소집단 활동 진흥 방안에 관한 실증적 연구

구일섭,김태성,이강인 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.2

The purpose of this research is to suggest the policy making for the effective promotion of Quality Small-Group activity. Since 1975, variety of organizations in Korea have widely the implemented Quality Small-Group activities for their management systems. Today, Companies are facing the harsh realities of a competitive environment. This is no time for revolutionary change. Instead, Companies are instituting revolutionary change meant to have impact within a very short time frame. Bold steps are required to lead the industry into a future of improved efficiency and significant productivity gains. The Worker's Quality Small-Group activity is, essentially, a trouble shooting oriented voluntary small group within their working place to improve the surroundings creatively. The industries have enthusiastically used Quality Small-Group activities and were influenced from them. The Quality Small-Group activities can be regarded as a kind of Knowledge Management where new knowledge is created and knowledge is shared in the economy. However, the academics were less interested in this subject, as a result, there were no systematic guidances for Quality Circle activities. Also, the government was less interested in these activities, as a result, there were no systematic policy making for Quality Small-Group activities. Thus, in this research, the effective policy making for Quality Small-Group activities were suggested which were based on the results of survey Questionnaires. As a results of this research, to maximize the effect of TQM in the nationwide, Quality Small-Group activity as a bottom-up management should be more expanded and revitalized.

대구지역의 국지적 대기순환풍의 환기경로에 관한 수치모의 실험

구현숙,김해동,강성대 한국환경과학회 2004 한국환경과학회지 Vol.13 No.4

In urban area, thermal pollution associated with heat island phenomena is generally regarded to make urban life uncomfortable. To overcome this urban thermal pollution problem, urban planning with consideration of urban climate, represented by the concept of urban ventilation lane, is widely practiced in many countries. In this study, the prevailing wind ventilation lane of a local winds in Daegu during the warm climate season was investigated by using surface wind data and RAMS(Reasonal Atmospheric Model System) simulation. The domain of interest is the vicinity of Daegu metropolitan city(about 900 km²) and its horizontal scale is about 30km. The simulations were conducted under the synoptic condition of late spring with the weak gradient wind and mostly clear sky. From the numerical simulations, the following two major conclusions were obtained: (1)The major wind passages of the local circulation wind generated by radiative cooling over the mountains(Mt. Palgong and Mt. Ap) are found. The winds blow down along the valley axis over the eastern part of the Daegu area as a gravity flow during nighttime. (2)After that time, the winds blow toward the western part of Daegu through the city center. As the result, the higher temperature region appears over the western part of Daegu metropolitan area.

돼지설사 원인균 E. coli의 생육저해에 대한 유산균의 효과

姜國熙,成文喜,方泰瑛,龍球淵,林讚洙 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

E. coli A_2 diarrhea causing bacteria of pigs was anaerobically inoculated with 10^5/ml into prereduced YS medium (10% reconstituted skim milk+0.1% yeast extract), and then lactic acid bacteria were inoculated with 10^5/ml and 10^7ml into previous inoculated samples of E. coli A_2. Inoculated samples cultured at 37℃, were tested to determine changes in viable numbers of organisms and pH. The experimental results are summerized as follows: 1. In the mixed culture medium of 10^5/ml E. coli A_2 and L. casei YIT9018, E. coli A_2 decreased after 36 hours from incubation. 2. In the mixed culture medium of 10^5/ml E. coli A_2 and L. acidophilus, E. coli A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 3. In the mixed culture medium of 10^5/ml E. coli A_2 and L. bulgaricus, E. coif A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 4. In the mixed culture medium of 10^5/ml E. coli A_2 and Str. thermophilus, E. coli A_2 decreased after 12 hours from incubation. 5. When the pH value of the mixed culture, was, 4. 5 below, E. coli A_2 decreased.

Sodium oxalate와 p-aminobenzenesulfoneamide dihydrochloride에 의한 축합중합체에 관한 연구

姜聖求 영남이공대학 산업기술연구소 1990 産業技術硏究 Vol.4 No.-

Sodium' oxalate and p-aminobenzenesulfoneamide dihydrochloride were condensed in dimethyl'sulfoxide. The yield of polymer from polymerization was more than 60% and the melting poing was 438℃. The polymer was very stable at high temperture.

고상-기상 반응에 의한 질화 알루미늄 휘스커 합성

강종봉,양성구,이성우,정승화 慶南大學校 附設 工業技術硏究所 2003 硏究論文集 Vol.21 No.2

질화알루미늄 휘스커 합성을 위하여, Al원으로는 Al_2O_3, Al(OH)_3, AlOOH를 사용하였고, 환원제로는 카본블랙, 기상반응을 유도하기 위하여 AlF_3, NH_4F, CaF_2를 사용하여 고순도 질소분위기에서 실험을 행하였다. 또한 액상반응 시 미세구조상의 변화를 확인하기 위하여 금속 알루미늄을 첨가하여 실험을 행하였다. 질화알루미늄의 생성과 침상형 휘스커상의 형상은 1600℃의 온도에서 가장 잘 나타났으며 열처리 온도의 상승은 오히려 휘스커상의 형성을 방해하고 있음을 보여주었다. 침상형 휘스커의 합성에 가장 큰 영향을 주는 것은 기상반응을 일으키는 AlF_3 첨가이며, AlF_3 첨가량이 증가함에 따라 침상형 휘스커상의 증가를 확인할 수 있었다. 액상 반응을 위한 금속 알루미늄 첨가는 전체의 15 wt%까지는 침상형 휘스커가 증가하였으나 15 wt%이상으로 첨가하는 경우 오히려 침상형 휘스커가 감소하는 것으로 나타났다. To synthesize aluminium nitride whisker, Al_2O_3, Al(OH)_3, and AlOOH were used for aluminium element. Experiment was done under the high purity nitrogen atmosphere with carbon black as deoxidation agent and AlF_3, NH_4F and CaF as gas phase reactants. Metallic aluminium was used for liquid phase reaction in which microstructural change occured. The AlN with whiskered Phase was formed at 1600℃ and the increase of temperature inhibited the formation of whiskered phase. AlF_3 was the main factor for the formation of needle-shaped whiskers, and the amount of whisker increased with AlF_3 contents. The amount of needle-shaped AlN whiskers increased with the addition of metallic aluminium up to 15 wt% but decreased with aluminium of above 15 wt%.

두부외상에 의한 기질성 정신장애환자의 단축형 K-WAIS

강종구,오상우 圓光大學校 醫科學硏究所 1996 圓光醫科學 Vol.12 No.1

The purpose of this study was to make an short form of K-WAIS for patients with organic mental disorder due to head trauma. The patients were 215 brain damage patients with organic mental disorder whose sex were composed of 160 male and 55 female. The new form consisted of comprehension, vocabulary, picture completion, and picture arrangement. Multiple correlation coefficient(R=.81) with Full IQ was higher than that of the existing short-form and could explain 66%. This result suggested that K-WAIS short-form was enable to estimate IQ for patients with organic mental disorder due to head trauma.