농아에서의 측두골 전산화 단층촬영 소견과 다른검사 요인과의 연관성

조태환,이상흔,권대구,엄규상,성창섭,김용선,한기원 경북대학교 병원 1998 경북대학교병원의학연구소논문집 Vol.2 No.1

Temporal bone high resolution computed tomogram(TBHRCT)is a essential diagnostic tool in considering for cochlear implantation in patients with profound sensorineural hearing loss. This study was designed for an effort to provide and efficacy of TBHRCT in determination of inner ear malformations for the patients who have profound sensorineural hearing loss and to examine the relationships between TBHRCT findings and other preoperative evalutions for cochlear implantation in that patients. Authors examined 68 deaf patients to provide fundamental data for cochlear implantation. Inner ear abnormalities were founded in 13(19%) patients, among which 10(14.7%) patients had Mondini'dysplasia in which 5 patients were hypoplastic type and 5 patients were hydrops type. Other inner ear abnormalities were as follows : lateral semicircular canal hypoplasia ; internal auditory canal abnormality ; cochlear aqueduct widening ; vestibular aqueduct widening. No relationships were found between TBHRCT findings and other test results. : promontory test, K-WISC cognitive test etc.(Korean J Otolaryngol 39 : 8, 1996)

유한요소법을 이용한 판 구조물의 진동인텐시티 해석

조대승,이동환,김사수,정상민 釜山大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.57 No.-

구조물의 진동인텐시티를 파악하면 진동에너지 전달경로와 소산기구 및 주된 기지원의 위치 등을 규명할 수 있어 구조물 진동의 효율적 저감 대책을 수립할 수 있다. 본 연구에서는 선박, 해양구조물 등과 같은 대형 복잡한 구조물의 진동인텐시티를 유한요소법으로 해석할 경우 적정한 모텔링 기법을 마련하고자 평판과 보강판에 대해 유한요소 모텔링을 달리 하면서 진동인텐시티 해석을 수행하고, 그 결과를 고전적 근사해법인 assumed mode method에 의한 결과와 비교·검토하였다. 이로부터 유한요법을 이용하여 판 구조물의 진동인텐시티 크기 및 방향을 정확하게 산정하기 위해서는 고유진동 또는 강제진동 해석의 경우보다 세밀한 유한요소 모텔링이 요구되지만 진동에너지 전달경로 규명 등을 위한 정서적 해석은 강제진동해석을 정확하게 할 수 있는 정도의 유한요소 모텔로도 가능함을 확인하였다. 아울러, 두께가 다른 평판 구조물, L-자형 판 구조물 및 3차원 box-girder에 대한 진동인텔시티 해석을 수행하여 다양한 판 구조물에 있어서 진동에너지의 전달 현상을 고찰하였다. The interest in evaluation of structural intensity arises for practical reasons, because net energy flow distribution offers information of energy transmission path, positions of sources, and sinks of vibration energy. In this paper, structural intensity analysis of plate structures using finite element method(FEM), which can be applied for more complex structures, is carried out. The purpose of this analysis is to evaluate the relative accuracy according to mesh fineness. The structural intensity of unstiffened and stiffened plates varying their mesh fineness is analyzed and the results are compared with those obtained by the assumed mode method. As results, the proper mesh size in qualitative/ quantitative structural intrnsity analysis of plate structures is proposed. In addition, the propagation phenomenon of vibration energy is investigated for the thickness-varying flat plate, L-type plate, and box-girder structures.

WIPI 기반 모바일 3D 게임엔진의 설계와 구현

형대진,김승구,조현준,박경환 동아대학교 정보기술연구소 2006 情報技術硏究所論文誌 Vol.14 No.1

In this paper, we introduce the method for developing the mobile 3D game engine based on the WIPI platform which has been proposed as the mobile standard platform. Our game engine is designed so that it supports OpenGL-ES and JSR-184 that are mobile 3D graphic APIs. Our game engine has a mobile emulator operated on PC and SDK to support mobile programming in PC environments. Mobile 3D game developers can use the APIs at various levels. Also, the game engine is developed in modular in order to support various game genres.

조직확장술을 이용한 탈모증의 치험예

김환익,김대영,조백현 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.1

The basic concepts of the wound healing are primary closure, secondary intension, skin graft, and flap surgery. The rapid advancement of the medicine and the operative technology enables each operation to improve that the concept of the wound healing is required to be the satisfactory cosmetic result rather than simple wound healing. In covering the skin defect, the flap surgery is superior to the skin graft in than the former provides more excellent color and texture than the latter, but the local flap from the small donor site has the problem of the restriction of the donor site and the scar according to the Barter's principle. Especially, in the case of the scalp defect, traditional methods such as hair graft or local flap have beeb used to treat the baldness, but they were restricted by the locality and the hair loss of the donor site. Since the introduction of the expansion technique by Radovan in 1957, the use of it has showen more excellent result than any other technique already used and has made it possible to cover thee recipient site without the loss of hair in donor site of the scalp. We implanted the tissue expanders of cresent, round, rectangular forms in the subgleal space in 11 cases of 8 scalp defect patients due to burn, trauma, and congenital disease and gradually expanded them by infusion of 10-15% of total volume at each time, 1-3 times a week after 2or3 weeks postoperatively. After 3-5 month of expansion, we could cover the scalp defect by the expanded scalp. We saw partial necrosis and transitional non-inflation in two cases, but we succeded to cover the scalp with the normal hair-bearing scalp in all the 11 cases.

RFID를 적용한 항공물류 SCM 시스템의 설계 및 구현

형대진,김승구,이재윤,조현준,박경환 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

The present the information sharing among the subjects was not enough in Airway Logisctics Industry, because each subject use the independent system. The Airway Logistics Network is suggestion, but the Airway Logistics Network dose not operate with efficient connection, because each subject attached to the connection among the internal system. If the RFID system which one of Auto-ID systems is introduce into Airway Logistics, an efficient management of Airway Logistics will be possible. In this Paper, we introduce the RFID system into Airway Logistics SCM system for an efficient management and an efficient information sharing. We also develop Airway Logistics SCM system with priority given to Forwarder which is occupy an important position in Airway Logistics industry.

국산 DAF 펌프의 기포특성

안대명,이창한,최윤찬,조석호,안갑환,김성수 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4

The paper introduces a domestic pump designed for dissolved air flotation (DAF). In the paper, the difference in performance between the domestic DAF pump and conventional pressure saturator is explained using the characteristics of air bubble released. The size distribution of air bubbles released from DAF pump is measured by image analyzer and particle size analyzer. And the mean diameter of bubbles is 43μm. The results are similar to that of pressure saturator. The air volume concentration in the water of domestic DAF pump and pressure saturator are 40 and 70% of theoretical amounts. In DAF system used domestic DAF pump, the removal efficiency of turbidity is 70%.

만성 승모판 패쇄부전증 환자에서의 안지오텐신 전환효소 억제제의 장기 투여 효과

김대희,이명묵,이해영,조현재,박승정,서재빈,서정원,양한모,윤창환,조상호,이준희,김용진,김명아,손대원,오병희,박영배 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

쌍태아에서 제 1태아의 분만 후 제 2태아의 지연분만 : 중례보고

김주환,서민정,유희정,노권일,조대현,박정규,이정헌,조성남,손영수 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.3

With the widespread use of fertility medications and techniques of in vitro fertilization, multiple gestation has become epidemic in modern obstetric practice. Delivery of the initial fetus in a multiple gestation usually is followed by delivery of the subsequent fetus or fetuses shortly thereafter. However in rare circumstances, the delivery is delayed for days due to disappearance of uterine contraction after delivery of the first fetus. When uterine activity ceases after the delivery of the first neonate, a policy of nonintervention may be considered in case of an immature or very premature delivery, in order to achieve a gestational age for the remaining fetus(es) more compatible with neonatal survival. We report a case of twin gestation with prolongation of the delivery interval between the twins for 46 days.

과민성 대장 증후군 환자에서 Colpermin 투여의 임상 효과

금민수,조창민,김대현,이창형,권영오,김성국,최용환,정준모 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 과민성 대장 증후군은 장기능 이상의 증상군으로, 인지할 수 있는 기질적 위장관 병태 생리가 없는 경우로 기능적인 장관의 이상 경축과 가장 밀접한 관련이 있을 것으로 생각된다. 그러나 치료면에서는 아직 뚜렷한 방침이 정립되어 있지 않고 다양한 방법들이 제시되고 있는 실정이다. 저자들은 장용성 캅셀로 조제된 박하유 성분인 Colpermin® 의 임상 효과를 평가하고자 본 연구를 시행하였다. 대상 및 방법 : 1996년 2월부터 1996년 11월까지 경북대학교병원 소화기 내과를 방문하여 과민성대장 증후군으로 진단된 34명의 환자를 대상으로 Colpermin® 을 1회 2캅셀씩, 1일 3회, 경구로 2주간 투여하였다. 결과 : 투여전의 증상의 빈도는 복통 88.2%(30/34) 및 설사 73.5%(25/34)를 호소하는 경우가 가장 많았으며, 그 다음으로 변비 50.0%(17/34), 복부 팽만 47.1%(16/34), 고창 38.2%(13/34)순이었다. 약물 투여후 증상별 개선율은 설사를 보였던 환자들에서 호전 11예와 매우 호전 11예로 88.0%(22/25)의 가장 높은 개선율을 보였고, 그 다음으로 복통 73.3%(22/30), 고창 69.2%(9/13), 변비 64.7%(11/17), 복부 팽만 56.3%(9/16)의 순이었다. 종합적인 증상의 개선도는 현저한 개선이 2예(5.9%), 중등도 개선이 9예(26.5%), 약간 개선이 18예(52.9%), 불변이 4예(11.8%), 악화가 1예(2.9%)였으며, 종합적인 유효율은 85.3%(29/34)였다. 약물의 부작용으로 3예의 환자에서 각각 복부 팽만의 발생, 변비의 악화, 복통의 발생이 있었으나, 그 외의 환자들에서는 아무런 부작용도 관찰되지 않았다. 결론 : 과민성 대장 증후군의 약물치료에 있어서 Colpermin®이 유용한 약제가 될 수 있을 것으로 기대된다. Irritable bowel syndrome (IBS) is a disease characterized by a collection of symptoms of intestinal dysfunctions, without any recognized organic gastrointestinal pathology. This study was performed to evaluate clinical effectiveness of peppermint oil (Colpermin®) in the treatment of patients with IBS. 34 patients (18 males and 16 females) with IBS were treated with peppermint oil 0.4ml (as menthol 176㎎) three times daily for 2 weeks and the efficacy of the treatment was evaluated according to the degree of the improvement. The improvement of symptoms was 88.0% (22/25) in diarrhea, 73.3% (22/30) in abdominal pain, 69.2% (9/13) in flatulence, 64.7% (11/17) in constipation, and 56.3% (9/16) in abdominal distension, respectively. Overall effectiveness of subjective symptoms was 85.3% (29/34). Side effects of the drug were noted in only 3 cases, those were aggravation of constipation, development of abdominal distension and abdominal pain. As a result, Colpermin® might be considered as an effective drug in relieving symptoms of IBS.

OpenGL에 기반한 전자부품 3D 그래픽 툴의 설계 및 구현

김승구,조현준,형대진,박경환 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

Up to the present, we have used general 3D modelling tool for 3 dimensions visualization of electronic parts. If we use general 3D modelling tool, we are consumed many time and effort because it is not optimized modelling of electronic parts. Therefore we need technical 3D modelling tool for electronic parts. In this paper, in order to solve this problem, we develop the graphic tool that model and visualize the electronic parts as 3 dimensions.