수지부 감각기능 회복을 위한 Neurovascular Island flap에 대한 고찰

김용성,이형주,이세일 大韓成形外科學會 1987 Archives of Plastic Surgery Vol.14 No.3

The skin defect of fingers, especially thumb & radial aspect of index finger, created a problem for its replacement with suitable skin, having a sensory nerve to restore optimimum sensation. In many techniques which developed to restore sensation of the injuried fingers, the neurovascular island flap was known to be most acceptable procedure. Authors performed neurovascular island flap for injuried fingers were 10 cases since Aug. 1983 to Oct. 1986. We followed up the patients form 2 months to 3 years. The results were follows; 1. The donor was obtained form the ulnar side of middle finger in 8 cases of ring figer in 2 cases. 2. Recovery of protective sensation such as touch, sharp/blunt discrimination, temperature was good. 3. Recovery of 2 point discrimination was good in 5 cases and poor in 5 cases. 4. Reorientation was recovered in 2 cases. 5. Cold intolernce was developed in 3 cases.

시간적 변화를 고려한 사용자 프로파일과 컨텍스트 정보를 적용한 협력적 필터링

이세일,이상용 한국지능시스템학회 2007 한국지능시스템학회 학술발표 논문집 Vol.17 No.1

유비쿼터스 환경의 추천 시스템에서는 협력적 필터링을 위하여 컨텍스트 정보를 사용하고 있으나, 컨텍스트 정보의 부족으로 인하여 추천 결과가 정확하지 않는 경우가 발생하게 된다. 이러한 문제를 해결하기 위하여 컨텍스트 정보와 더불어 사용자 프로파일의 서비스 이력 정보를 사용하였으나, 사용자 프로파일의 서비스 이력 정보는 시간이 지남에 따라 사용자의 기호가 변하거나 유행에 영향을 받을 수 있는 문제점이 있다. 또한 컨텍스트 정보와 사용자 프로파일의 서비스 이력 정보는 상황에 따라 적절히 연동하지 못하여 부정확한 예측을 할 수가 있다. 본 논문에서는 시간의 경과에 따라 사용자의 기호나 유행이 변하는 경우, 사용자 프로파일의 서비스 이력 정보들을 일률적인 값으로 적용하는 것이 아니라 시간에 따라 가중치를 달리 적용하는 방법을 사용하였다. 그리고 컨텍스트 정보와 사용자 프로파일의 서비스 이력 정보가 상황에 따라 적절히 연동하지 못하는 문제는 협력적 필터링하여 나온 결과에 컨텍스트 정보와 사용자 프로파일의 서비스 이력 정보의 가중치를 달리 적용하여 통합함으로써 예측성을 높일 수 있었다.

사용자 프로파일 정보와 실시간 컨텍스트 정보를 이용한 협력적 필터링

이세일,이상용 한국지능시스템학회 2006 한국지능시스템학회 학술발표 논문집 Vol.16 No.1

추천시스템에서 가장 많이 사용하고 있는 협력적 필터링 방법을 모바일 기기 등에서 사용하려면 추천 정보와 사용자들의 평가 정보가 부족하여 추천의 질이 떨어지게 된다. 이러한 문제를 해결하기 위해 실시간으로 얻어진 컨텍스트 정보를 정량화하여 협력적 필터링에 적용함으로써 보다 나은 추천 결과를 얻을 수 있었다. 그럼에도 불구하고 평가를 하기 위한 컨텍스트 정보가 충분하지 목한 경우 부정확한 결과를 가져올 수 있다. 또한 사용자 정보 평가 과정 중 정량화 단계의 분류 과정을 단순히 하게 되면 서비스 받는 사용자가 정확한 그룹에 분류되어 정확도가 결여되는 문제가 발행한다. 본 논문에서는 실시간으로 얻을 수 있는 컨텍스트 정보가 부족한 경우, 내용 기반 필터링에서 많이 사용하고 있는 사용자 프로파일 정보를 실시간 컨텍스트 정보와 결합한다. 그리고 정량화 단계를 개선하여 협력적 필터링함으로써 기존의 방법보다 향상된 결과를 얻을 수 있다.

구개누공의 임상적고찰

국원석,심영기,이세일 大韓成形外科學會 1990 Archives of Plastic Surgery Vol.17 No.5

The incidence and treatment modalities of palatal fiatula have been studied in 453 cleft palate patients to whom we have offered primary palatoplasty at the department of plastic and Reconstructive surgery, National Medical for the period of last 9 years. The results are followings; 1) The palatal fistula occurred in 21 among 453 patients of palatoplasty. 2) Among the 31 patients who have been operated with palatal fistula, the original types of cleft palate was bilateral complete cleft palate in 15 patients, unilateral complete cleft palate in 14 patients, and incomplete cleft palate in 2 patients. 3) Among the 31 patients with palatal fistula, success rate was 55% in 20 patients who were operated before 5 years old, and 90% in 10 patients operated after 6 years old of their age. 4) Almost all of the fistulae were located at the anterior portion of hard palate, and 5-10 mm sized, oval shaped slit was the most common type.(27 of 31) 5) Eleven among 31 patients recurred after correction of the palatal fistula. their original type of the cleft was unilateral cleft in 4 patients, and bilateral cleft in 7 patients. 6) Width of palatal celft, tensile suture of mucoperiosteum due to inadequate dissection, infection, inappropriate size of local flap, and inaccurate suture method and difficult location to repair of palatal cleft may cause palatal fistula after palatoplasty.

단일 패키지의 특성 분석을 통한 고출력 발광 다이오드 모듈의 접합 온도 측정

이세일,김우영,정영기,양종경,박대희,Lee, Se-IL,Kim, Woo-Young,Jeong, Young-Gi,Yang, Jong-Kyung,Park, Dae-Hee 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.12

The temperature of junction in LED affects the life time and performance. however, the measurement of junction temperature in module is very difficult. In this paper, to measure the junction temperature in LED module, optical and electrical properties is measured in single package in temperature from 25 [$^{\circ}C$] to 85 [$^{\circ}C$], and then junction temperature can is estimated in module with measuring the average voltage of single package. As results, the junction temperature of single package is measured the temperature of 61.2 [$^{\circ}C$] in ambient temperature, also, the junction temperature of LED module is measured the temperature of 72.5 [$^{\circ}C$] in ambient temperature.

A recommendation system using dynamic profiles and relative quantification

이세일,이상용 한국지능시스템학회 2007 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.7 No.3

Recommendation systems provide users with proper services using context information being input from many sensors occasionally under ubiquitous computing environment. But in case there isn't sufficient context information for service recommendation in spite of much context information, there can be problems of resulting in inexact result. In addition, in the quantification step to use context information, there are problems of classifying context information inexactly because of using an absolute classification course.In this paper, we solved the problem of lack of necessary context information for service recommendation by using dynamic profile information. We also improved the problem of absolute classification by using a relative classification of context information in quantification step. As the result of experiments, expectation preference degree was improved by 7.5% as compared with collaborative filtering methods using an absolute quantification method where context information of P2P mobile agent is used.

황색육아종성 신우신염 1례

이세일,류현열,이응우,박윤규,장세국 大韓泌尿器科學會 1983 Korean Journal of Urology Vol.24 No.2

운영여유를 고려한 축류 압축기 최적설계

이세일,강영석,김형진,이상아,김규홍,이관중 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11

본 연구에서는 축류 압축기의 공력 효율 향상과 안정적인 운영 여유를 확보하기 위한 동익 형상 최적설계를 수행하였다. 공력 효율 향상을 위해서 단열 효율을 목적함수로 정의하였고, 이와 동시에 운영 여유를 증대시키기 위하여 허브 코너 실속과 관련이 있는 Lieblein 확산계수를 목적함수로 정의하였다. 또한 구조적 안정성을 위하여 안전계수 또한 목적함수로 정의하여 목적함수를 향상시키기 위한 최적설계를 수행하였다. 보다 효율적인 최적설계를 위해 근사모델을 사용하여 최적설계를 진행하였고 근사모델로는 크리깅 모델을 사용하였다. 그 결과 공력 효율이 1.06% 향상되었고 Lieblein 확산계수는 3.99% 감소되어 실속여유가 19.68% 더 확보되었고 구조안전계수 또한 13.02% 향상된 결과를 얻었다. In this study, axial compressor rotor blade design optimization was done for aerodynamic efficiency with securing the operation margin. For aerodynamic efficiency, adiabatic efficiency was selected and to secure the operation margin, Lieblein diffusion factor was chosen. The Lieblein diffusion factor is known for relationship with hub corner stall from other researches. Surrogate model method was adopted for efficient optimization and the kriging model was used in this work. After this optimization, adiabatic efficiency was increased 1.06%. The stall margin was expanded 19.68% with 3.99% decreasing in Lieblein diffusion factor. And the safety factor was also increased 13.02%.

하악과 설기저부를 침습한 악성 치성 상피성 유령세포종의 치험례

길민석,이충재,이세일 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.2

Benign odontogenic neoplasms are rare, but malignant odontogenic neoplasms are extremely rare. The majority of malignant epithelial neoplasms occurring in the jaws are the result of metastasis from distant primary neoplasms of direct invasion from contiguous carcinoma of the oral mucosa, sinus mucosa, salivary gland or skin. A few remaining primary intraosseous carcinoma of the jaw are presumed to be of mostly odontogenic origin since epithelial remnants of odontogenesis are numerous in the maxilla arts mandible. Although calcifying odontogenic cyst(COC) is a well-established pathologic entity, it has been recognized that there is an odontogenic neoplasm with histologic features similar to the COC(malignant epithelial odontogenic host cell tumor; EOGCT) that has been diagnosed as COC. Some authors have reported previously in the literature describing malignant EOGCT. We experienced one case of malignant EOGCT with aggressive growth pattern and histologic features strongly implying its malignant potential. The lesion was excised by anterior mandibular resection, total1 resection of the tongue and bilateral functional neck dissection. The tongue was reconstructed by using the infrahyoid muscle neurovascular island flap and neurovascular radial forearm free flap. The mandible was reconstructed by using the osteocutaneous fibular free flap.

최근 12년간 욕창의 외과적 치료성적에 대한 고찰

장효죽,홍인표,최정준,김종환,이세일 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.3

Pressure sore is common problem in bedriden patients or spinal cord injured persons. It needs excellent nursing care for prevention and treatment. The advent of muscle flaps and water flotation beds have contributed significantly to the success of operative closure of pressure sores. However, the long term results of surguical procedures are not well described. We reviewed the data from 52 consecutive patients with 69 pressure sores operated in National Medical Center between 1983 and 1994 in an effort to look at initial operative success and late recurrence. The results were as follows : 1. The incidence according to age was highest in 4th decade. 2. Trauma was most frequent cause of pressure sore, traffic accident was cause of 16 cases and falling down injury was cause of 15 cases. 3. The total number of pressure sores was 69 cases in 52 patients 4. The most frequent site of pressure sore was sacral area(32 cases), others was as follows : ischial area(18 cases), greater trochanteric area(10 cases), heel(7 cases), back(2 cases) 5. Pressure sores were treated by myocutaneous flap, fasciocutaneous flap in 49 cases and 20 cases were treated by random local flap, STSG. The myocutaneous flap and fasciocutaneous flap were as following : gluteus maximus rotation flap(19 cases), gluteus maximus V-Y advancement flap(9 cases), tensor fascia lata(8 cases), gluteus maximus sliding flap(5 cases), posteriorgluteal thigh flap(2 cases), thigh trasposition flap(3 cases), total thigh flap(2 cases), hamstring myocutaneous flap(1) 6. The postoperative complications were suture-line dehiscence(9 cases), hematoma collection(4 cases), wound infection(4 cases), pneumonia(1 case), total loss of STSG(2 cases). The complication rate was 33.3%. 7. The recurrence of pressure sore occurred in 36 cases including second and third recurrence(7 cases). The rate of recurrence was higher on random local flap and STSG than myocutaneous, fasciocutaneous flap. 8. The most common site of recurrence was the ischial area(in 13 cases)which was increased than before in Korea. 9. The analysis of duration until pressure sore was recurred revealed that 10 pressure sores were recurred on 7-9 months after initial surgery because the postoperative management was improper.