혈관 부착 이식 비골에 발생한 피로골절

김형민,김윤수,이기행,정창훈,김준석,Kim, Hyoung-Min,Kim, Youn-Soo,Lee, Kee-Haeng,Jeong, Chang-Hoon,Kim, Jun-Seok 대한미세수술학회 2001 Archives of reconstructive microsurgery Vol.10 No.1

Purpose : The purpose of this study was to evaluate stress fracture of vascularized fibular grafts(VFG) by analyzing factors associated with stress fracture and the treatment results. Materials and Methods : From June 1985 to May 1998, 7 patients with stress fractures in the 38 patients with long bone defect who had vascularized fibular graft were evaluated with clinical and radiologic methods including grafted fibular length and hypertrophic index of de Boer. The average age of the patients was 35 years(range, $14{\sim}60$ years). The mean follow-up period was 20 months(range, $16{\sim}32$ months). Results: 7(18.4%) stress fractures occurred in 38 patients. Characteristics of the fractures were (1) all occurred at lower extremity of male patients treated with VFG for long bone defected caused by infected nonunion; (2) all occurred 10 months at the average(range, $4{\sim}17$ months) after VFG; and (3) the length and hypertrophic index of grafted fibula had no influence on the incidence of stress fracture. Union was obtained in 3 patients by conservative treatment. 4 patients obtained union by internal fixation; one at immediately onset of fracture; and three after failure of conservative treatment who had fracture around the knee joint. Conclusion : Stress fracture may occur during the first one year after vascularized fibular graft and more attention must be paid for prevention of it, especially in the cases of infected nonunion. Stress fracture around the knee joint was expected to lead to a good result of early union by operative treatment.

NGN 서비스 구현과 성능측정

김형민,김화성,최영일,이병선,Kim Hyoung-min,Kim Hwa-sung,Choi Young-il,Lee Byung-sun 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.1B

오늘날 통신네트워크는 음성과 데이터의 통합으로 가는 것과 동시에 새로운 서비스가 요구가 증가됨에 따라서 NGN으로 변화하고 있다. NGN은 Service, Transport, Distributed Processing Environment의 3개 계층으로 구성된다. 여기서 Service 계층은 다시 애플리케이션 계층과 Service Component 계층으로 구분할 수 있다. Parlay Group은 third-party 애플리케이션 제공의 실현을 위하여, 애플리케이션과 Service Component Layer사이에 인터페이스로 개방형 Parlay API를 채택하고 있다. Parlay API를 사용함으로써 third-party 업체들은 네트워크 제공자가 제공하는 Service component위에 있는 애플리케이션 레이어 즉 새로운 애플리케이션을 개발을 하게 될 것이다. 본 논문에서는 third-party 서비스를 이용한 Third Party Call Control (TPCC) 서비스를 구현 하였다. TPCC서비스는 Parlay APl와 Parlay X APl를 사용해 각각 구현하였으며 Transport layer에서 시그널링 프로토콜로는 SIP를 사용하였다. 또한 각 구현사항들에 대하여 성능 측정을 실시하여 비교하였다. Communication network is in a transition toward the NGN (Next Generation Networks) to accommodate the explosive demand of new services. The NGN allows the third-party application provisioning by defining the networks as layers of Services, Distributed Processing Environment and Transport. Especially, the Service layer can further be divided into Application and Service Component layer. In order to realize the third-party application provisioning, the Parlay Group has adopted an open Parlay API as an interface between the Application and the Service Component layer. Using Parlay API, the third parties may develop and deploy the IT-based applications at the Application layer exploiting the service components located within network operators' domain. In this paper, we present the implementation details about the Third Party Call Control (TPCC) Service using the third-party service logic based on Parlay API and Parlay X API, when SIP is used as a signaling protocol in Transport layer. Also, we compare the performance evaluation of both implementations.

지방근막 피판술에 의한 연부 조직 결손의 재건

김형민,이승구,송석환,정양국,이주엽,하난경,손일남,박일중,Kim, Hyoung-Min,Rhee, Seung-Koo,Song, Seok-Whan,Chung, Yang-Guk,Lee, Joo-Yup,Ha, Nan-Kyoung,Son, Il-Nam,Park, Il-Jung 대한미세수술학회 2006 Archives of reconstructive microsurgery Vol.15 No.2

With advances in techniques and instrumentation, the primary concern of microsurgeons has shifted from flap anatomy and survival toward flap refinement and donor-site function and aesthetics because flap survival rates have risen 96 percent. However, the problem still remains on regard that most flap has disadvantages that flap itself is too bulky or leaves unaesthetic scar to the donor site. These problems can be solved by using adipofascial flap instead of fasciocutaneous flap. The adipofascial flap not only has minimal donor site morbidity, but also can be retained thin. It seems that its advantages can be applied on soft tissue defect of exposed body part.

팽창식 튜브를 부착한 6m급 스포츠 보트 개발에 관한 연구

김형민,서성부,Kim, Hyoung-Min,Suh, Sung-Bu 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.5

The 6m class high speed boat is developed with a durable hull and inflatable tube, which is called RIB(Rigid Inflatable Boat), for the purpose of marine leisure. In the stage of the conceptual design, its requirements to be optimized are determined based on the presented information of similar marine leisure RIBs. The 3-D graphical technique using Marine Rhino is utilized to optimize the compartment layout of RIB. The stability analysis is performed for the light and full load conditions with and without the inflatable tube. In addition, the sea keeping and hydrodynamic performance was tested using the proto-type ship in the sea condition. From the results of the computation and the sea trial test, it shows that the performance of the marine leisure RIB satisfies the speed, the convenience, and the stability requirements. This study provides the typical information of the design factors and the procedure to manufacture the marine leisure RIB.

혈관경 이식술을 이용한 거골의 외상성 무혈성 괴사의 치료 - 2례의 예비보고 -

김형민,정창훈,이기행,최문구,김윤수,고락현,Kim, Hyoung-Min,Jeong, Chang-Hoon,Lee, Kee-Haeng,Choi, Moon-Gu,Kim, Yoon-Soo,Ko, Lak-Hyun 대한미세수술학회 1999 Archives of reconstructive microsurgery Vol.8 No.1

Avascular necrosis is a significant late complication of talar neck fracture. However, treatment for early stage avascular necrosis has been not established. Two patients with post-traumatic avascular necrosis of talus treated with vascular pedicle graft using lateral tarsal artery were reviewed to determine the efficacy of procedure. The procedure involved grafting the lateral tarsal artery and vein into a hole made in the talus through a anterolateral approach. Follow-up was 12 and 24 months respectively. Two patients had significant pain relief, improved function, no worsening of their radiologic staging. The results are promising enough to recommend consideration of this procedure in early stages of avascular necrosis.

시스템엔지니어링 기반의 스마트 안전관리 시스템설계: 작업자와 이동 장비를 중심으로

김형민,윤성재,홍대근,서석환,Kim, Hyoung Min,Yoon, Sung Jae,Hong, Dae Guen,Suh, Suk-Hwan 한국시스템엔지니어링학회 2015 시스템엔지니어링학술지 Vol.11 No.2

Industrial safety is one of the crucial agenda for Government as well as Manufacturing Industry. To cope with the needs, a great deal of policies and technical implementation have been proposed and implemented. With a great increasing attention on the Industry 4.0 and Smart Factory, industrial safety has received as a crucial agenda by the manufacturing industry in particular. Up until now, almost all of them have been made from the environmental aspects, rather than operator or workers. In this paper, we present our research results how to increase the workers' safety via smart factory technology, such as IoT and CPS. Our approach has been to see the problem from SE perspectives, to draw the real issues from the various stakeholders, and define how to solve the problem based on the emerging technologies. The developed systems can give conceptual framework for the 'smart' industrial safety system by providing solution architecture for how to monitor the location of workers, and moving equipments, and generate solutions how to avoid safety problems between them if detected.

광대역통합망에서의 비동기 구조를 이용한 신뢰성 있는 웹 서비스 제공방안

김형민,정의헌,김화성,Kim Hyoung-min,Jung Yeu-hun,Kim Hwa-sung 한국정보처리학회 2005 정보처리학회논문지 C : 정보통신,정보보안 Vol.12 No.6

Recently, the telecommunication network is in a transition toward the BcN (Broadband convergence Networks) that integrates the Internet, the telecommunication and the broadcasting. The BcN makes it possible to provide of 4he third-party application by using the Open API The Parlay X API is an example of the Open API and the Parlay X API is grafted in the Web Service and is abstracted from the Parlay API. So, the Parlay X API does not only have advantages of a Web Service, but also disadvantages of the Web Service. The main disadvantage of the Web Service is that it does not support the any QoS mechanism. In this paper, we propose the architecture that solves the reliability among the QoS issues for the Web Service. The proposed mechanism adopts the Asynchronous architecture for the reliable Web Service and improves the performance of the retransmission between the client and the server using the expected response time. We perform the performance evaluation through the simulation in older to compare with the existing mechanism. Consequently, we can confirm that the performance of the proposed mechanism performs better than the existing mechanism. 최근 정보통신환경은 통신, 방송, 인터넷이 통합되는 디지털 융합 서비스 제공 형태로 급속히 변화하고 있다. 이에 따라 통신환경이 개방형 네트워크 형태의 광대역통합망으로 변화하였다. 이런 광대역통합망에서는 Open API(Application Program Interface)에 의하여 감third-party 응용의 제공을 가능하게 한다. Open API에는 대표적으로 Parlay API가 있으며 Parlay API와 웹 서비스를 접목시키고 한 단계 더 추상화한 Parlay X API가 있다. Parlay X API는 웹 서비스를 이용한다. 따라서 Parlay X API는 웹 서비스의 장점을 가지고 있지만 웹 서비스의 단점도 가지고 있다. 웹 서비스의 가장 큰 단점으로는 웹 서비스에 QoS(Quality of Servixe)제공을 위한 방법이 제시되어 있지 않다는 것이다. 본 논문에서는 웹 서비스를 광대역통합망에서 효율적으로 동작시키기 위해서 QoS의 여러 문제 중 신뢰성 지원방안에 대하여 제시하고자 한다. 제안된 방안은 웹 서비스의 신뢰성 지원을 위하여 비동기 구조를 적용하고, 예상응답시간을 이용하여 클라이언트와 서버간의 재전송 효율을 증가시키고자 한다. 시뮬레이션을 통하여 성능평가를 실행하였으며 기존의 방법과 비교하여 보았다 피 결과 제안된 방범이 기존의 방법보다 좋은 성능을 보인 것을 확인할 수 있었다.

고주파 마그네트론 스퍼터링법으로 제조된 ZnO:Ga,In(IGZO) 박막의 특성

김형민,마대영,박기철,Kim, Hyoung Min,Ma, Tae Young,Park, Ki Cheol 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.1

IGZO thin films have been prepared by RF magnetron sputtering. The structural, electrical and optical properties of the IGZO thin films have been investigated as a function of deposition condition. XRD analysis of IGZO thin films showed a typical crystallographic orientation with c-axis perpendicular regardless of deposition conditions. The carrier mobility, carrier concentration and resistivity of the IGZO films sputtered at 200 W, 1mTorr and $300^{\circ}C$ were $28.5cm^2/V{\cdot}sec$, $2.6{\times}10^{20}cm^3$, $8.8{\times}10^{-4}{\Omega}{\cdot}cm$ respectively. The optical transmittance were higher than 80% at visible region regardless of the deposition conditions under the experiments above, and specifically higher than 90% at wave length over 500 nm. The absorption edge was shifted to shorter wavelength with increase of carrier concentration.

고압 전기감전시 발생한 수근관절 주위의 진구성 연부조직 결손에 대한 유리 피판술

김형민,정창훈,이기행,고영석,Kim, Hyoung-Min,Jeong, Chang-Hoon,Lee, Gee-Heng,Koh, Young-Seok 대한미세수술학회 1998 Archives of reconstructive microsurgery Vol.7 No.1

With the advent of microvascular free-tissue transfer, this single stage resurfacing method for large scar and soft tissue defects around the wrist in the patients of electrical burn has distinctive advantage over the conventional multistage pedicle-flap transfer. Between 1992 and 1996, we treated 9 cases of 8 patients who had large scar around the wrist due to old electrical burn with free flaps as a preparation of staged tendon graft. Mean age was 30.3 years and average scar area was $6{\times}11cm$. The length of time the injury and free flaps was 9 months on an average. Prior to the free flap, we performed the angiography to all patients in order to evaluate the circulation of the forearm and hand and to choose the recipient vessel. In all cases, proximal ulnar arteries in the forearm remained intact and all radial arteries remained intact in 8 of 9 cases on angiogram. The interosseous arteries were well visualized in all cases. We used the ulnar arteries as a recipient artery. The types of flaps used were f scapular cutaneous flaps, 2 dorsalis pedis flaps and a radial forearm flap. Flap survial was 100 percents with satisfactory functional and cosmetic results. Free flaps using ulnar artery as a recipient artery is one of the useful reconstruction methods for the resurfacing of large scar around the wrist in the patients of old electrical burn.

전방골간신경 증후군: 수술적으로 치료한 7예에 대한 임상적 고찰

김형민,정창훈,이상욱,노연태,박일중,Kim, Hyoung-Min,Jeong, Chang-Hoon,Lee, Sang-Uk,Roh, Youn-Tae,Park, Il-Jung 대한미세수술학회 2009 Archives of reconstructive microsurgery Vol.18 No.2

Purpose: The etiology and treatment strategy of the anterior interosseous nerve (AIN) syndrome are still controversial. Seven patients with the AIN syndrome who were treated by surgical exploration and neurolysis were reviewed at a mean of 35.9 months follow up period. Materials & Methods: There were six men and one woman. The mean age was 37.3 years, ranging from 26 to 59. No patient was related to trauma and associated neurological lesion. Surgical exploration was performed at 7.7 months after onset of paralysis. Results: All except one patients experienced pain around the elbow region before the onset of the palsy. On 7 patients, only the flexor pollicis longus was paralysed in 1, only the index flexor digitorum profundus in 2, and none had paralysis of the middle. The most common compression structures were fibrous bands within flexor digitorum sublimis arcade. However there was no demonstrable abnormality in three. Recovery was complete in all cases within 12 months after surgery. Conclusion: We recommended surgical exploration and neurolysis in patients who have shown no improvement after 6 months of conservative treatment. And careful preoperative examination is essential to avoid misdiagnosis and inappropriate surgery, especially in incomplete AIN syndrome.