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유창은,박기태,이준모,Yu, Chang Eun,Park, Ki Tae,Lee, Jun-Mo 대한미세수술학회 2011 Archives of reconstructive microsurgery Vol.20 No.2
Purpose: Gracilis muscle free flap transplantation is chosen in the medium sized soft tissue defect and bone exposure from trauma and chronic osteomyelitis in the lower extremity. We set a study to search for gracilis free flaps to know whether symptoms were cured or recurred in patients that have passed over 10 years from flap transplantation. Materials and Methods: From August 1995 through September 2010, we have performed 28 cases of gracilis muscle free flap in the lower extremities. Ever since no case visited to demand any discomfort, breakdown or recurrence in the flap site on outpatient basis. We made a telephone call to patients or relatives documented in the medical record and only 2 cases visited outpatient department and 9 cases postponed the visit who satisfied with the final result but 17 cases had wrong telephone numbers. Causes, area of lower extremity, recipient vessels in the lower extremity, condition of the donor thigh and overall satisfaction of the flap transplantation in activities of daily living were investigated and written down in the medical record. Results: 11 cases were reviewed after average postoperative 13.7 years. Gracilis muscle flaps were not break down at the recipient site in all cases. The wound of donor thigh wound healed good and overall activities of daily living was satisfied in all cases. Conclusion: Gracilis muscle flaps which had performed and followed up average 13.7 years revealed confident in the medium sized soft tissue defect and bone exposure from trauma and chronic osteomyelitis in the lower extremity.
척추 압박 골절을 동반한 임신 및 수유로 인한 골다공증
유창은,최병열 대한골다공증학회 2014 Osteoporosis and Sarcopenia Vol.12 No.2
Pregnancy- and lactation associated osteoporosis is a rare condition. However, it may cause fragility fracture with severe pain. A 29-year-old woman had first delivery without any complications and she was breast-feeding her baby. In a postpartum one month, she had a severe back pain and it has gotten worse. She was diagnosed with multiple recent compression fractures in thoracic spines and treated with brace immobilization and bisphosphonate therapy. We report this rare case of pregnancy- and lactation associated osteoporosis with multiple vertebral compression fractures.
문화예술 분야의 보상형 크라우드펀딩 성공 결정요인: 소셜 커뮤니케이션 활동 효과를 중심으로
유창한,현은정 한국문화경제학회 2018 문화경제연구 Vol.21 No.3
본 연구의 저자들은 최근 문화예술 분야에서 자금 조달 수단으로 인기를 얻고 있는 크라우드펀딩의 성공 요인을 실증 분석을 통해 살펴보았다. 국내 대표적인 보상형 크라우드펀딩 플랫폼 중 하나인 텀블벅(Tumblbug)의 목록(2018년 6월 기준)에 있는 장편영화, 다큐멘터리,단편영화, 애니메이션, 웹시리즈 카테고리에 해당하는 총 494개의 프로젝트를 대상 표본으로 하여, 해당 프로젝트의 크라우드펀딩을 통한 최종 모금액에 미치는 여러 요인의 관계를 위계적 선형 회귀 모형을 통해 분석하였다. 본 연구는 특히 해당 프로젝트 제안자의 과거 경험을 통해 축적한 사회적 자본과 해당 프로젝트 소개 페이지에 보이는 소셜 커뮤니케이션 활동에 주목하고, 이러한 요인들이 크라우드펀딩 성공 여부에 영향을 미치는지를 살펴보았다. 분석결과, 프로젝트 제안자가 다른 프로젝트 제안자의 프로젝트를 지원하는 이타적인 행위를 통해 축적한 사회적 자본과 아울러 모금 기간에 크라우드펀딩 웹사이트 내에서 이루어지는 소셜 커뮤니케이션 활동이 최종 모금액에 긍정적인 효과를 미치는 것으로 나타났다. 또한 소셜 커뮤니케이션 활동이 모금액에 미치는 긍정적인 효과는 투자자에게 제공되는 보상 그리고 프로젝트 제안자의 사회적 자본이 적을 경우 그 영향이 더 큰 것으로 나타났다. In this study, we empirically investigated the antecedents of crowdfunding success in the arts and cultural field using the case of Tumblbug in Korea. We collected data on 494 projects listed on Tumblebug in the arts and culture category that includes feature film, documentary, short film, animation, and Web series, as of June 2018. We analyzed the factors associated with the final amount raised via crowdfunding on Tumblbug using the hierarchical regression method. We find that the social capital accumulated by a focal entrepreneur (i.e., the proposer/designer of a focal project) through prior participation in other related projects and social communication activities carried out during the funding period, respectively, have positive effects on the final amount raised. More interestingly, we also find that the intensity of social communication plays a central role in the funding success of arts and culture-related projects by supplementing the lack of the entrepreneur’s social capital and the reward features including a given project.
유창호,김성훈 한국재활복지공학회 2016 재활복지공학회논문지 Vol.10 No.3
Magnetic sensors and actuators have been widely used in industry and medical fields. Integrated systems based on sensors and actuators are defined as mechatronics that is the general combination of mechanics and electronics. Recently, magnetic wireless sensors and actuators have been developed and used at a systematic level. In particular, their mechanisms depend on magnetic, such as magnetic material and physical phenomena. However, their research boundary has not been clear. Researchers talk of magnetic micro-robots, magnetic actuators and sensors. Therefore, a new and correct definition is required. In this study, we introduce the advanced and extended concept of mechatronics, which is a magneto-mechantronics for biomedical and rehabilitation. Among various applications, we focused on wireless pump and sensing system for blood vessel rehabilitation and local motion capture, respectively.
수중 양식시설 침입자 감시를 위한 무선센서망 기반 분산형 추적필터
유창호(Chang Ho Yu),최재원(Jae Weon Choi) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.2
This paper deals with the problem of tracking a single trespasser on a fish farm moving through Underwater Wireless Sensor Networks(UWSNs) by employing underwater acoustic sensors. This paper addresses the issues of estimating the states of a trespasser, and improving energy efficiency by applying the Kalman filter in distributed architecture. Each underwater wireless sensor node composing the UWSNs is battery-powered, so the energy conservation problem is a critical issue. This paper provides an algorithm that increases the energy efficiency of each sensor node through Waked-up/Sleeping(WuS) sensor node selecting schemes. Simulation results illustrate the performance of the distributed tracking filter for a fish farm trespasser.