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박명철,최은정,차진한 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.1
The hand has much more delicate functions to be performed and its structural characters shoud be fully understood to mannage them properly. In care of hand injuries, is is essential for prevention of deformities and residual sequelas after injury, exact preoperative diagnosis, proper treatment, and intensive postoperatvie care. A statistical analysis was carried out on 464 patients of hand injuries, who were treated at the Department of Plastic, and Reconstructive Surgery, Konkuk University hospital, from October, 1988 to December, 1991. The followings are the results of our analysis, 1. The peak incidence rate was in the age group of 20-29 yerars(40.9%) and most of all were male in 87.4% 2. The glass injury was the most common cause of injuries in 30.4%. 3. Most of the patients were able to get the chance of early medical card by arriveing hospital within six hours in 87.7%. 4. There were no significant difference rate of all seasons. 5. The most frequency of admission duration was 1 week(53.0%) and OPD treatment usually lost for 1-2months(61.2%) 6. Monodigit injury(47.4%) was most frequenly involved, of mondigit injury was index finger(31.3%) 7. The type of injury was mainly crushing(40.3%), involving multiple structures. 8. 26.5% of hand injuries were treated with debridement and multiple combined operation. 9. Various complication of hand injuries were observed in 5.8% and the most commin complication was infection in 10 cases(37.1%). 10. Results of recovery was more excellent in a single injury than combined injury.
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Micro-cavity형 광섬유 Fabry-Perot 간섭계의 형성 및 고감도 압력센서에의 응용
김명규,박동수,김창원,김진섭,이정희,손병기 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1
Because micro-cavity type optical fiber Fabry-Perot interferometric pressure sensor itself play a signal processing role, it has electrical safty and is immune to EMI(electro-magnetic interference). And it also has high sensitivity in the measured range and low sensitivity dependence on the thickness of diaphragm. Therefore it has many advantages, so it will be applicable to accelerate sensor, flow sensor, and microphone, etc.. In this paper, using silicon anisotropic etching technique and fiber optic sensing technique, micro-cavity type optical fiber Fabry-Perot interferometer was formed and a highly sensitive pressure sensor was fabricated. The fabricated micro-cavity type optical fiber Fabry -Perot interferometric pressure sensor showed repeatedly good output characteristics.
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차진한,박명철 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.1
Replantation of the upper extremity has been developed over 30 years from a laboratory experimental model to a common techique applicable to acute and reconstructive hand surgeries. Today, successful replantation of fingers proximal to the middle phalanx is common. yet salvage of amputated fingers, distal to the DIP joint is still a challanging problem. Technical expertise in microvascular surgery may allow the true replantation of parts amputed within the distal interphalangeal joint. The functional and cosmetic success of these replantations is excellent. The authors report replantation cases, distal to the distal interphalangeal joint of fingers and retrospective analysis of 20 cases which were treated at Min Joong hospital, Collge of Medicine, Kon Kuk university, from October 1988 to February 1992 The results were as follows : 1. The survival rate of amputated digits distal to the DIP joint was 85% 2. Important factors for the successful replantation were the type of injury and the degree of crushing. 3. Replanted digits were improved in esthetical and functional aspects 4. If possible, the authors tried the venous anastomosis in 13 cases among the total 20 of cases.
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차진한,박명철 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.2
10 cases finger tip injury with defects of pulp or nail bed were covered by island flaps with digital vessels, in reversed vascular pedicle fashion. The survival of the flap was successful in all cases. The arterial blood flow is derived form the digital palmar arch which is anastomosed between the radial ?? ulna sides at the level of midpart of finger. Several commumicating branches between the venae commitates and the collateral branches enable to drain reversely. Finger tip sensation was provided by the anastomosis between the divided digital nerve end and the dissected digital nerve branch of the island flap. Follow up was from 6 months to 13 months postoperatively. The functional evaluation revealed as follow. There was no cold intolerence of affected finger, but there was touch and pain sensation of flap. The shape of affected finger was acceptable aesthetically. The two point discrimination ranged 6mm to 10mm(average: 7.9mm).
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박명섭,박우진 한국해법학회 2005 韓國海法學會誌 Vol.27 No.1
원산지규정은 물품 등의 원산지 판정방법 및 확인절차에 관한 규정으로 관련 정책들에도 활용되고 있다. 하지만 아직 통일된 국제규범이 없어 원산지규정이 나라마다 서로 다를 뿐만 아니라 그 내용이 불명확하고 복잡하여 오랫동안 무역장벽의 기능을 발휘하고 있기도 하다. 그러므로, 우리나라와 중국의 무역규모는 지속적으로 증가하고 있기에 우리가 중국의 원산지규정에 관심을 기울일 필요는 충분하다. 다행히도 원산지규정과 관련된 중국의 자의적이고 불충분하였던 통상 정책은 2005년 초 개선되었다. 과거 수입품과 수출품에 서로 다른 잣대를 가지고 있어서 공정성이 의심되었던 중국의 규정은 하나의 기준으로 통합되었다. 그러나 규정이 여전히 모호하고 불충분한 부분들이 있으며 그 적용에 있어서 중국정부의 자의성이 개입할 여지도 남아 있어서 정책의 일관성과 투명성은 아직도 의문스럽다. "Rules of origin" are the criteria needed to determine where a product was made. They are used to implement measures and instruments of such policy. While there is wide variation in the practice of governments with regard to the rules of origin, the complexity of different discriminatory measures depending on the origin of goods in practice has had restricting effects on international trade for a long time. As the trade volume between Korea and China is increasing continuously, Korea needs to pay attention to the practice of China regarding the rules of origin. China's disputable and deficient commercial policy instrument about the rules of origin, fortunately, has implemented and enforced since the beginning of 2005. In the past. China's regulation was in question of its equitability in practice because there were double standards between imported goods and exported goods. China's new regulation enforces single standard for both of imported and exported goods. However, the concreteness and transparency of the policy are still questionable due to the unclear provisions and insufficient regulation. And it still has room in practice for the discretion of China's government.
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박종진,박정원,박성호,박주명,권태경,김성교 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2
The aim of this study was to investigate the effect of light irradiation modes on polymerization shrinkage, degree of cure and microleakage of a composite resin. VIP^™ (Bisco Dental Products, Schaumburg, IL, USA) and Optilux 501^™(demetron/ Kerr, Danbury, CT, USA) were used for curing Filtek^™ Z-250(3M Dental Products, St. Paul., MN, USA) composite resin using following irradiation modes: VIP^™ (Bisco) 200mW/cm^2 (V2), 400mW/cm^2 (V4), 600mW/cm^2 (V6), Pulse-delay (200 mW/cm^2 3 seconds, 5 minutes wait, 600mW/cm^2 30seconds, VPD) and Optilux 501^™ (Demetron/Kerr) C-mode (OC), R-mode (OR). Linear polymerization shrinkage of the composite specimens were measured using Linometer (R&B, Daejeon, Korea) for 90 seconds for V2, V4, V6, OC, OR groups and for up to 363 seconds for VPD group (n=10, each). Degree of conversion was measured using FTIR spectrometer (IFS 120 HR, Bruker Karlsruhe, Germany) at the bottom surface of 2 mm thick composite specimens. V2, V4, V6, OC groups were measured separately at five irradiation times (5, 10, 20, 40, 60 seconds) and Or, VPD groups were measured in the above mentioned irradiation modes (n=5, each). Microhardness was measured using Digital microhardness tester (FM7, Future-Tech Co., Tokyo, Japan) at the top and bottom surfaces of 2mm thick composite specimens after exposure to the same irradiation modes as the test of degree of conversion(n=3, each). For the microleakage test, class V cavities were prepared on the distal surface of the ninety extracted human third molars. The cavities were restored with one of the following irradiation modes: V2/60 seconds. V4/40 seconds, V6/30 seconds, VPD, OC and OR. Microleakage was asessed by dye penetration along enamel and dentin marigns of cavities. Mean polymerization shrinkage, mean degree of conversion and mean microhardness values for all groups at each time were analyzed using one-way ANOVA and Duncan's multiple range test, and using chisquare test for microleakage values. The results were as follows: ·Polymerization shrinkage was increased with higher light intensity in groups using VIP^™(Bisco) : the highset with 600mW/cm^2, followed by Pulse-delay, 400mW/cm^2 and 200mW/cm^2 groups. The degree of polymerization shrinkage was higher with Continuous mode than with Ramp mode in groups using Optilux 501^™ (Demetron/Kerr). ·Degree of conversion and microhardness values were higher with higher light intensity. The final degree of conversion was in the range of 44.7 to 54.98% and the final microhardness value in the range of 34.10 to 56.340. ·Microleakage was greater in dentin margin than in enamel margin. Higher light intensity showed more microleakage in dentin margin in groups using VIP^™ (Bisco). The microleakage was the lowest with Continuous mode in enamel margin and with Ramp mode in dentin margin when Optilux 501^™ (Demetron/Kerr) was used.
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Park, Sung-Jin,Park, Jong-Myong,Kim, Wha-Jung,Ghim, Sa-Youl The Korean Society for Microbiology and Biotechnol 2012 Journal of microbiology and biotechnology Vol.22 No.11
Microbiological calcium carbonate precipitation (MCCP) has been investigated for its ability to improve the durability of cement mortar. However, very few strains have been applied to crack remediation and strengthening of cementitious materials. In this study, we report the biodeposition of Bacillus subtilis 168 and its ability to enhance the durability of cement material. B. subtilis 168 was applied to the surface of cement specimens. The results showed a new layer of deposited organic-inorganic composites on the surface of the cement paste. In addition, the water permeability of the cement paste treated with B. subtilis 168 was lower than that of non-treated specimens. Furthermore, artificial cracks in the cement paste were completely remediated by the biodeposition of B. subtilis 168. The compressive strength of cement mortar treated with B. subtilis 168 increased by about 19.5% when compared with samples completed with only B4 medium. Taken together, these findings suggest that the biodeposition of B. subtilis 168 could be used as a sealing and coating agent to improve the strength and water resistance of concrete. This is the first paper to report the application of Bacillus subtilis 168 for its ability to improve the durability of cement mortar through calcium carbonate precipitation.
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Radiofrequency Ablation Treatment for Renal Cell Carcinoma: Early Clinical Experience
Park, Seong-Hoon,Yoon, Seong Kuk,Cho, Jin Han,Oh, Jong Young,Nam, Kyung Jin,Kwon, Hee-Jin,Kim, Su-Yeon,Kang, Myong Jin,Choi, Sunseob,Sung, Gyung-Tak The Korean Radiological Society 2008 KOREAN JOURNAL OF RADIOLOGY Vol.9 No.4
<P><B>Objective</B></P><P>To evaluate the early clinical experience associated with radiofrequency (RF) ablation in patients with renal cell carcinoma (RCC).</P><P><B>Materials and Methods</B></P><P>The RF ablation treatment was performed on 17 tumors from 16 patients (mean age, 60.5 years; range, 43-73 years) with RCC. The treatment indications were localized, solid renal mass, comorbidities, high operation risk, and refusal to perform surgery. All tumors were treated by a percutaneous CT (n = 10), followed by an US-guided (n = 2), laparoscopy-assisted US (n = 2), and an open (n = 2) RF ablation. Furthermore, patients underwent a follow-up CT at one day, one week, one month, three and six months, and then every six months from the onset of treatment. We evaluated the technical success, technical effectiveness, ablation zone, benign periablation enhancement, irregular peripheral enhancement, and complications.</P><P><B>Results</B></P><P>All 17 exophytic tumors (mean size, 2.2 cm; range, 1.1-5.0 cm) were completely ablated. Technical success and effectiveness was achieved in all cases and the mean follow-up period was 23.8 months (range, 17-33 months). A local recurrence was not detected in any of the cases; however, five patients developed complications as a result of treatment, including hematuria (n = 2), mild thermal injury of the psoas muscle (n = 1), mild hydronephrosis (n = 1), and fistula formation (n = 1).</P><P><B>Conclusion</B></P><P>The RF ablation is an alternative treatment for exophytic RCCs and represents a promising treatment for some patients with small RCCs.</P>
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