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섬유사 다발의 비틀림, 이완장치를 이용한 하수방류수의 부유물질 여과기술
강영배 ( Young Bae Kang ),송현준 ( Hyun Jun Song ),박태규 ( Tae Gyu Park ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.3
N/A The solid removal efficiency of the twist filter was evaluated to alternate the conventional rapid sand filtration processes. The effluent of conventional wastewater treatment plant, such as activate sludge process, was used for the raw water of twist filter. As a results, the effluent concentration of suspended solids was less than 1 mg/L by treating twist filter. This result shows that the twist filter is superior to the conventional rapid sand filtration in removing the solids. Further, the filtrated water of the twist filter is applicable for the reuse of the wastewater treatment plants effluent.
김승기,장한,박원종,이남기,송현준 대한골절학회 1997 대한골절학회지 Vol.10 No.1
Management of severe diaphyseal fracture of radius and ulna in children can be a challenging problem. Reduction and maintenance of the position of two mobile parallei bones is difficult because pronating and supinating muscles produce angulatory as well as rotational forces. Open reduction and internal fixation are generally accepted for adult forearm fractures, but controversy sunounds open reduction for children. What should be done for the irreducible fracture that will result in a malunion? Several authors 2.11.18) advocate open reduction in children over l0 years of age rather than accept poor position. And others 1.10.15.17.20.22.23) advocate open reduction regardless of age if closed reduction is unsatisfactory. We reviewed thirteen children between 6-14 years of age, who had irrducible fractures of diaphysis of forearm both bone, and who were treated with open reduction and internal fixation with plate for mid I/3 fractures(4 cases) and open reduction and internal fixation with K-wires for distal 1/3 fractures(9 cases). The results were as follows; l. 2 cases(15%) had limitation of pronation within 10° comparing with uninjured sine. But 11 cases(85%) had equal movements on both sides. And the range of motions of the elbow and wrist are within normal limit. 2. More than 20° angulation for mid l/3 fracture over 10 years of age, and more than 20° angulation or 20% displacement for distal 1/3 fracture over 6 years of age, it would be better to perform a surgical treatment if nonsurgical treatment was failed. 3. Immobilization periods were 5 weeks for plate fixation group and 6.9 weeks for K-wire fixation group. Bone union was occurred in all cases, at 9 weeks in plate fixation group and S weeks in K-wire fixation group. 4. Its better to fix with plate for proximal 2/3 fracture and K-wire for distal 1/3 fracture in case of operation. In conclusion, our results of open reduction and internal fixation were satisfactory if adequate alignment of fractures had not been achieved or maintained.
경골외과 골절의 외측 반월상 연골판 절개를 이용한 도달법
이기행,김형민,정창훈,최문구,송현준 대한골절학회 1997 대한골절학회지 Vol.10 No.1
Exposure to the posterolateral comer of the tibial condyle was difficult due to narrow joint space and meniscus. From l995. 1. to l996. 4.. the authors operatively reduced and internally fixed 9 cases of lateral tibial plateau fractures using lateral meniscal incision with minimal detatchment and retraction to improve visualization posterior aspect of articular cartilage Eight of the 9 cases were studied with three dimentional computerised tomogram and 1 case with roentgenographic tomogram to evaluate the shape, site and degree of comminution of the fracture fragments. ROM exercise was started at weeks postopratively, manipulation under anesthesia were done in 3 cases at 12 weeks postoperatively. The follow up period was 13 months (from 8M to lyr 11M). The results were obtained as follows, 1. Seven cases were split depression type, one was pure depression type and one was bicondylar type. 2. Articular depression were posterolateral aspect in 8 cases, and lateral aspect in one case. The degree of depression was average 15 mm(range from 6mm to 22mm). 3. Six of the 9 cases had peripheral tear of the lateral meniscus 4. Second look arthroscopy shows that the incision site of the meniscus were thinned but completely healed in 3 cases. 5. The ROM of the knee joint were 0 - over l35 in seven cases. 0° - 90° in one case, 30- 60° in one case. This meniscal incision approach was one of the effective methods that provides exposure of the entire articula surface of the lateral tibial condyle easily to allow accurate reduction.