결핵성 척추염에서 양측 접근법에 의한 전방척추융합술의 수술적치험 1예

강중식,조준,윤승환,문창택,장상근 건국대학교 의과학연구소 2001 건국의과학학술지 Vol.11 No.-

In the treatment of tuberculous spondylitis, posterior spinal fusion is more simple and safe procedures than anterior spinal fusion. We performed bilateral anterior spinal fusion with autologous iliac bone graft and concomitant with psoas muscle abscess drainage and antituberculosis drug. As a result, patient was possible early ambulation and he had no recurrence, no complication such as resorption of bone fragment and kyphotic angle change. This article describeds the advantage of bilateral anterior approach in tuberculous spondylitis wish psoas abscess.

일체부착형 합성고분자 시트를 이용한 지하구조물 방수 성능 향상에 관한 실험적 연구

강효진,오상근 서울産業大學校 2005 논문집 Vol.54 No.2

The waterproofing in slab and wall of underground structure have a couple of construction methods which are inside waterproofing methods for inner surface, and outside waterproofing methods for out wall and slab surface waterproofing. In resent years, however, it has been adapted the inside waterproofing construction method, as increasing of construction expenses cost and low workability and technology, nevertheless, outside waterproofing has set a most high value construction method. In inside waterproofing construction method, it is difficult to repair and assure durability and safety for concrete which has direct water-press. So, it is necessary for adopt the outside waterproofing method. For that reasons, this study based on the application for outside waterproofing method on the under ground structure, to introduce mono adhesive sheet waterproofing materials to more increase durability, as considering chemical and physical properties.

중공유리구에 고정화된 광촉매를 이용한 남조류의 증식억제

강민수,정익상,우승희,김성우,이동근 경상대학교 환경보전연구소 2001 環境保全硏究所報 Vol.9 No.-

Photocatalytic inactivation of Microcystisaeruginosa was carried out with the TiO₂-coated pyrex hollow glass beads under the illumination of UV light(370㎚ wavelength). After being irradiated with UV light in the presence of the TiO₂-coated pyrex glass beads, Microcystis aeruginosa, known as typical cyanobacteria, lost their photosynthetic activity, and the colonies of Microcystis cells were completely separated into individual spherical one. Complete photocatalytic inactivation of Microcystis aeruginosa was obtained in about 30min. Photosynthesis activity of the cyanobacteria could be inhibited effectively after being reacted photocatalytically with TiO₂ immobilized hollow glass ball.

스타인메츠결선 자기여자 유도 발전기의 커패시턴스 결정

강상수,좌종근 제주대학교 공과대학 첨단기술연구소 2007 尖端技術硏究所論文集 Vol.18 No.-

This paper describes a simple and straightforward method for determining the minimum capacitance required to self excitation in a three-phase induction generator with Steinmetz connection. Using the input impedance of the induction generator and the self-excitation condition, the capacitance is computed by real and imaginary function in an application software. This solution method is applied to determine the capacitance required to maintain the specified terminal voltage when the generator is supplying load. The computed results are compared with Chan and Lai's results to verify the proposed method.

환경 인쇄물 기반 어휘 활동이 초등학교 영어 학습자의 어휘 학습 결과와 정의적 태도에 미치는 영향

강은정,신상근 이화여자대학교 교과교육연구소 2017 교과교육학연구 Vol.21 No.5

This study investigates the effects of environmental prints on vocabulary learning of Korean Elementary School English language learners and their perspectives on vocabulary learning. The participants were 107 elementary school students in Kyunggi province, and they were divided into two groups. The students in both groups participated in vocabulary learning activities based on different materials, which were environmental prints and photos, respectively. The results of the post-test and delayed post-test showed that the students in the environmental prints group learned significantly more vocabulary items than the students in the photos group. The analyses of the students’ responses to the questionnaire revealed that the environmental print group had shown significant progress in interests and confidence in vocabulary learning. The results also showed that the students believed that they may be able to use the target words in their lives, indicating that environmental prints enhanced the situational authenticity of vocabulary instruction. These results suggest that environmental prints are useful instructional materials for vocabulary teaching in elementary school English instruction. 본 연구의 목적은 환경 인쇄물을 활용한 어휘 학습 활동이 초등학교 영어 학습자의 어휘 학습 결과와 어휘 학습에 대한 태도에 미치는 영향을 알아보는 데 있다. 환경 인쇄물은 학습자가 실생활에서 쉽게 접할 수 있고 목표 어휘에 대한 맥락을 제공하며 학습자의 학습동기를 높일 수 있어서 모국어 교육에서는 많이 활용되지만 제2 언어 어휘 교육에서는 상대적으로 많이 활용되지 않고 있는 실정이다. 본 연구는 환경 인쇄물이 영어를 외국어로 배우는 환경에서 초등학교 어휘 학습에 유용한 교수 자료인지 알아보고자 한다. 이를 위하여 본 연구에서는 초등학교 6학년 학습자를 대상으로 초등학교 어휘 교수에서 많이 사용되고 있는 사진 자료를 사용해서 어휘를 학습한 집단과 환경 인쇄물을 활용한 어휘 학습 집단으로 나누어 총 60개의 어휘를 교수한 후 학습 결과와 학습자의 정의적 태도를 비교하였다. 연구 결과 환경 인쇄물을 활용한 집단이 사진을 활용하여 어휘를 학습한 집단보다 통계적으로 유의미한 수준에서 어휘를 더 많이 학습한 것으로 나타났다. 어휘 학습에 대한 흥미와 자신감, 그리고 어휘 학습의 중요성에 대한 학습자의 반응을 비교한 결과 자신감 영역에서 환경 인쇄물 집단의 점수가 사진 집단의 점수보다 더 높았다.

장애인 및 노약자를 위한 생활관련 시설의 연계방향

강병근,성기창,박광재,윤영삼,김상운,정현정,류상오 한국의료복지시설학회 2009 의료·복지 건축 Vol.15 No.1

This study aims to plan connecting living facilities considering on the Barrier Free Walking of the disabled and the elderly in the residential area. We had found several physical problems on the peestrian's way that becomes the major factor of disturbing the barrier free movement for using living facilities in the local area by investigations and enquetes. We had suggested the arrangement method for these physical problems on the pedestrian's way and building the ideal area for living facilities by the disposition stages with the result of investigations and enquetes. After these process, we had planned connecting living facilities considering on the Barrier Free WaIking of the disabled and the elderly in the residential area.

통합오염원단위 지수를 이용한 환경성과 측정

강상목,정영근,조주현 한국환경경제학회 한국자원경제학회 2005 자원·환경경제연구 Vol.14 No.1

본 연구의 목적은 한국의 24개 광업과 제조업종을 대상으로 1995~1999년간 통합된 오염원단위 지수와 변화지수를 제시하고 이를 통하여 환경성과를 측정하고자 함이다. 본 연구는 오염원단위의 새로운 정의와 통합된 오염원단위를 측정하는 새로운 기법을 제시한다. 광업과 제조업을 경공업, 중공업 그리고 중공업내 오염산업과 여타중공업으로 구분하고 실증적으로 통합원단위 지수와 변화지수를 계측한다. 통합오염원단위 지수 기준으로 중공업내 오염산업은 가장 오염집약적인 업종인 반면, 같은 중공업내 여타 중공업에 속한 업종은 가장 오염저감에 성공적이다. 통합오염원단위 변화지수를 기준으로 산업 전체의 평균치는 1,091로서 오염배출량변화지수가 1.133으로 연간 13.3% 증가한 반면 산출량변화지수는 1.039로 연간 3.9% 증가하여 약 9.1% 상승하였다. 경공업과 중공업의 통합원 단위 변화지수는 각각 1.125와 1.042였고, 오염산업의 평균이 1.287로 가장 높았음에도 중공업의 평균이 낮았던 것은 역시 여타 중공업의 평균이 0.9)3으로 연간 약 9% 가량 감소하였기 때문이다. This paper measures integrated pollution intensities and changes in pollution intensity, and figure out environmental performance. We introduce a new definition of pollution intensity and its method measuring integrated pollution intensities. We distinguish 24 manufacturing industries into light industry and heavy industry, and divide heavy industry into pollution industry and the other residual heavy industry to measure the integrated pollution intensities and their changes. While the pollution industry within heavy industry, based on the integrated pollution intensity, was the most pollution-intensive, the other residual heavy industry within the heavy industry was the most successive in reducing pollutants. The annualized average index of the integrated pollution intensities grew as much as 9.1 percent, of which the annualized change in the index of pollution emission increased 13.3 percent, but the improvement of 3.9 percent in the change of output quantity offset the increase in the index of pollution emission. The changes in the integrated pollution intensity for the light and heavy industries were 1.125 and 1.042, respectively. The reason the heavy industry showed the lower change in the index of pollution intensity, while the change in the pollution industry was very high, was because the average change in the other heavy industry decreased around 9 percent.

Rat의 복강내에 투여한 5-fluorouracil-polyglycolic acid 제형이 장기에 미치는 영향에 관한 연구

강대영,송규상,최정목,노승무,정경수,오정연,김진향,양준묵,최선웅,이진호,조준식,민병무,김용백,김창식,박근성,김승영,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

For more effective intraperitoneal chemotherapy, the authers made 5-fluorouracil-polyglycolic acid composite disks(FU-PGA disks) with 5-fluorouracil and polyglycolic acid, a biodegradable polymer. We inserted the FU-PGA disk into the peritoneal cavites of Sprague-Dawley male rats, the control and three experimental groups; one FU-PGA disk insert group(300mg/kg), two FU-PGA disk insert group(600mg/kg), and three FU-PGA disk insert group(900mg/kg). The control group received a similar number of PGA disk inserts. A pharmacokinetic study was performed to measure the 5-fluorouracil concentration in the peritoneal fluid, blood, and tissues(liver, kidney and heart) at 24 hours, 72hours and 168 hours after insertion of the FU-PGA disk. Light and electron microscopic studies were done. The results were as follows: 1) The number of white blood cells and platelets decreased after FU-PGA insertion. The degree was proportional to the duration and amounts inserted. The change in the number of red blood cells varied slightly. 2) Light microscopically, slight changes were noted at 168 hours in the 3 disk insert group (900mg/kg). Mild fatty change and hepatocyte degeneration around the central veins of the liver were noted, with vacuolar degeneration in the proximal convoluted tubules of the kidney. 3) Electron microscopically,the liver showed focal increases of lipid droplets in the hepatocytes, and irregular nuclear membrane with focal nucleolar segregation of the fibrillar and granular elements. Also the double membranous structure of the hepatocytes and Kupffer cells was widened with bleb formation. The kidney showed wide separation of the nuclear double membrane in the proximal convoluted tubular cells and mesangial cells, with vacuolation and myelin figure formation in the mitochondria of the proximal convoluted tubular cells, at 72 hours and 168 hours in the 2 to 3 FU-PGA insert groups. The heart showed focal loss of cristae,vacuolation and myelin figure formation in the mitochondria of the 2 to 3 FU-PGA insert groups. In conclusion, despite the large amont of FU-PGA inserted, the histopathological changes in the liver, kidney and heart were slight, and consonant with the very low amount of 5-fluorouracil concentrations detected in the liver, kidney and heart. The above results suggest that the FU-PGA composite can serve as a new device for releasing drugs in a controlled manner and easily targeted to intraperitoneal organs. This device can improve the efficacy of intraperitoneal chemotherapy for gastric cancer.

진양호 수질의 영양상태 평가에 관한 연구

강민수,김성우,이동근 경상대학교 환경보전연구소 1999 環境保全硏究所報 Vol.7 No.-

The purpose of this study was to assess trophic state of Chinyang Lake using monthly water quility data in 1998, and to suggest adequate protection method of water supply source. The results of water quality variations and trophic states were evaluated as follows; 1. Algae had rapidly grown from June, and this resulted in the increase of pH, Chlorophyll-a and COD. 2. The annual average ratio of COD by algal biomass to total COD was estimated to be 12% and had the highest value of 31.6% in June. 3. The ration of T-N/T-P was 53.7, and phosphorus became the liming factor for the eutrophication. 4. When considering T-P and Chlorophyll-a concentration, Chinyang Lake seems to be eutrophic state. 5. From the evaluation by TSI & LTSI methods, Chinyang Lake could become rapidly into eutrophic state.

파손된 치면열구전색제의 수리 방법에 따른 미세누출 비교

강명봉,현홍근,김영재,김정욱,장기택,이상훈,한세현,김종철 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

치면열구전색은 수 십년간 교합면 우식의 예방에 가장 효과적인 방법 중 한가지로 알려져 왔다. 하지만 치면열구전색제의 마모와 파절 때문에 치면열구전색제의 재시술 또는 수리를 필요로 하게 되었다. 본 연구의 목적은 파손된 치면열구전색제를 수리할 때 치질과 잔여 전색제의 표면처리 방법에 따른 미세누출 차이를 알아보고자 하는 것이다. 120개의 영구 대구치에 치면열구전색제를 적용하고 인위적인 파손을 만든 뒤 인공타액에 4주 동안 보관하였다. 4주 후 근심 또는 원심의 치면열구전색제가 완전히 파손 양상을 나타내는 치아 60개를 선택하여 각각 15개씩 4개 군으로 나누어 실험에 사용하였다. 각 군을 산부식만 시행한 경우(1군), air-abrasion만 시행한 경우(2군), 산부식 후 결합제를 적용한 경우(3군), air-abrasion 후 결합제를 적용한 경우(4군)로 나눠 각각의 치아를 표면처리한 후 치면열구전색제를 도포하였다. 고온(55℃)과 저온(5℃)에서 각각 30초씩 500회의 열순환을 시행한 뒤 미세누출도를 검사하여 다음과 같은 결과를 얻었다. 1. 치면열구전색제/치면열구전색제 경계면에서 미세누출도는 결합제 사용 유무에 관계없이 air-abrasion을 처리한 2군, 4군에서 산부식을 사용한 1군, 3군보다 낮은 값을 보였고(p<0.05) 1군과 2군, 3군과 4군 사이에는 통계적 유의차가 없었다(p>0.05). 2. 치면열구전색제/치아 경계면에서 미세누출도는 결합제를 사용한 3군, 4군에서 결합제를 사용하지 않은 1군, 2군보다 낮은 값을 보였고(p<0.05) 산부식을 사용한 1, 3군과 air-abrasion을 사용한 2, 4군 사이에는 통계적 유의차가 없었다(p>0.05). 3. SEM 상에서 치면열구전색제를 산부식 처리하였을 때 표면거칠기의 증가가 적었으나 air-abrasion 하였을 경우 표면거칠기가 현저하게 증가하는 것을 관찰하였다. The aim of this study was to investigate whether differences in surface treatment Prior to repair influenced the seal of a resin fissure sealant placed on the occlusal surfaces of permanent molar teeth. One hundred and twenty extracted human molars were selected and a light curing sealant was placed on their occlusal surface following cleaning by prophylaxis and acid etching. The teeth were deliberately damaged, and then stored in artificial saliva for four weeks. Sixty teeth with the desired morphology of sealant failure were randomly divided into four groups where one group was treated with only etching agent, another by only air-abrasion, another by applying an etching agent followed by a bonding agent, and the last by air-abrasion followed by a bonding agent each. After sealant application, the samples were thermocycled and the degree of microleakage was determined. The results were as follows: 1. In the sealant/sealant interface, group 2(0.22), 4(0.23) using air-abrasion showed a significantly lower microleakage score than group 1(0.38), 3(0.35) using an etching agent(p<0.05). There were no statistically significant differences(p>0.05) between groups 1, 2 and groups 3, 4. 2. In the sealant/tooth interface, group 3(0.20), 4(0.20) which used a bonding agent showed a significantly lower microleakage score than group 1(0.35), 2(0.40)(p<0.05). There were no statistically significant differences (p>0.05) between groups 1, 3 and groups 2, 4. 3. In SEM examination, while sealant surfaces treated with etching did not result in highly rough surfaces, those treated with air-abrasion did show rough surfaces.