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비대칭형 스크류 로터용 플라이커터의 치형설계에 대한 연구
최상훈,Choi, Sang-Hun 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.1
In this study, we designed tooth profile of the fly-cutter for antisymmetric rotor which is used in screw compressor. In order to verify this profile, we manufactured three different pairs(J46, N46, P46) of antisymmetric rotor using fly-cutter. We got the following conclusions from this study. (1) We obtained better contact condition using 3pairs of rotor which are manufactured by the fly-cutter. (2) We could prevent the cutter interference near bottom point of the robe of screw rotor.
부분 요도협착에서 Holmium Laser를 이용한 내시경하 내요도절개술의 초기 경험
최상훈,이용성,최낙규,김형주 대한비뇨의학회 2009 Investigative and Clinical Urology Vol.50 No.3
Purpose: Endoscopic holmium:yttrium-aluminum-garnet (Ho:YAG) laser urethrotomy is an alternative method in the management of urethral strictures. We report our initial experience in 15 cases of evaluating the therapeutic efficacy of the holmium laser for treating incomplete urethral strictures. Materials and Methods: Endoscopic holmium laser urethrotomy was primarily performed on 15 patients with incomplete urethral stricture. Exclusion criteria were complete urethral stricture and previous treatment of urethral stricture. Retrograde urethrography and uroflowmetry were performed preoperatively and were carried out as follow-up studies postoperatively. Results: Successful results without recurrence were achieved in 8 of 15 patients. When we classified the results by stricture length, the success rate was 80% in strictures less than 2 cm, whereas there was no therapeutic effect in strictures over 2 cm. When we classified the results by etiology, the number of successful results in strictures with an inflammatory, trauma, iatrogenic, or unknown cause was 2 (2/8), 3 (3/4), 2 (2/2), and 1 (1/1), respectively. In 7 patients who failed treatment, we repeated holmium laser urethrotomy in 5 patients and urethroplasty in 2 patients. No operative complications occurred in any patients. Conclusions: Endoscopic holmium laser urethrotomy is a safe and effective minimally invasive therapeutic modality in cases of stricture less than 2 cm. Further data from long-term follow-up are necessary to compare the success rate with that of conventional urethrotomy and urethroplasty. Purpose: Endoscopic holmium:yttrium-aluminum-garnet (Ho:YAG) laser urethrotomy is an alternative method in the management of urethral strictures. We report our initial experience in 15 cases of evaluating the therapeutic efficacy of the holmium laser for treating incomplete urethral strictures. Materials and Methods: Endoscopic holmium laser urethrotomy was primarily performed on 15 patients with incomplete urethral stricture. Exclusion criteria were complete urethral stricture and previous treatment of urethral stricture. Retrograde urethrography and uroflowmetry were performed preoperatively and were carried out as follow-up studies postoperatively. Results: Successful results without recurrence were achieved in 8 of 15 patients. When we classified the results by stricture length, the success rate was 80% in strictures less than 2 cm, whereas there was no therapeutic effect in strictures over 2 cm. When we classified the results by etiology, the number of successful results in strictures with an inflammatory, trauma, iatrogenic, or unknown cause was 2 (2/8), 3 (3/4), 2 (2/2), and 1 (1/1), respectively. In 7 patients who failed treatment, we repeated holmium laser urethrotomy in 5 patients and urethroplasty in 2 patients. No operative complications occurred in any patients. Conclusions: Endoscopic holmium laser urethrotomy is a safe and effective minimally invasive therapeutic modality in cases of stricture less than 2 cm. Further data from long-term follow-up are necessary to compare the success rate with that of conventional urethrotomy and urethroplasty.
최상훈,오찬호 한국통합생물학회 2007 Animal cells and systems Vol.11 No.1
Liposome-entrapped atypical Aeromonas hydrophilaantigen was prepared to investigate the potential protectiveefficacy for A. hydrophila infection. Carp (Cyprinus carpio)were immunized orally with liposome-entrapped A. hydrophilaspecific antibodies were detected in serum, intestinal mucusand bile than non-imunized control group. The immunizedcarp were then challenged by immersion with 1 × 106 cfu/mlof A. hyrdophila for 60 min. Of the eight non-immunizedcarp, three carp died (62.5% survival), whereas five out of six(83.5%) of the immunized survived. Furthermore, developmentof skin ulcers was significantly inhibited in carp immunizedwith liposomes containing A. hydrophila antigen. Theseresults suggest that liposomes containing A. hydrophilaantigen have a potential for induction of protective immuneresponses against atypical A. hydrophila infection and alsosuggest the possibility of developing a vaccine that mayultimately be used for prevention of fish diseases.