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김선용,박광환,이진우,Kim, Sun-Yong,Park, Kwang-Hwan,Lee, Jin-Woo 대한족부족관절학회 2010 대한족부족관절학회지 Vol.14 No.1
Purpose: The purpose of this study was to evaluate the clinical and radiological outcomes of the S.E.R.I. (simple, effective, rapid, inexpensive) operation for the bunionette deformity. Materials and Methods: Between March 2005 and February 2009, 22 patients (26 feet) who had been treated for the bunionette deformity with minimally invasive osteotomy were reviewed retrospectively. Clinically, Visual Analogue Scale (VAS), American Orthopaedic Foot and Ankle Society (AOFAS) score, shoes selectivity, disappearance of callus and patient's satisfaction level by Coughlin scoring system were evaluated. Radiologically, the bunionette was classified as four types according to the Fallat classification. The 4-5$^{th}$ intermetatarsal angle (4-5$^{th}$ IMA), the 5$^{th}$ metatarsophalangeal angle (5$^{th}$ MPA) and the length of 5th metatarsal bone (5$^{th}$ MTL) were analyzed at preoperatively and at final follow up visit. Results: VAS improved from $6.8{\pm}1.8$ points to $2.2{\pm}1.8$ points (p<0.05). AOFAS score improved from $54.0{\pm}14.2$ points to $90.0{\pm}4.8$ points (p<0.05). There was no change in shoes selectivity. 9 feet (34.6%) were satisfied with excellent results, 16 feet (61.5%) with good results and 1 foot (3.9%) with fair results. The average 4-5$^{th}$ IMA was corrected from $10.1{\pm}2.3^{\circ}$ to $4.4{\pm}1.7^{\circ}$ (p<0.05). The average 5$^{th}$ MPA was corrected from $11.5{\pm}8.6^{\circ}$ to $-0.1{\pm}4.1^{\circ}$ (p<0.05). The average 5$^{th}$ MTL was changed from $66.1{\pm}4.3$ millimeters to $64.1{\pm}4.4$ millimeters (p=0.069). There was no malunion, nonunion or delayed union and other perioperative complications. Conclusion: S.E.R.I. operation is less invasive and easy technique. This procedure is recommendable for the treatment of the bunionette deformity.
김선용,이의웅,Kim, Sun-Yong,Lee, Eui-Wung 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.2
Two major salivary glands, submandibular duct, lingual nerve, and vessels are situated beneath the mouth floor. Among these, passing through the pterygomandibular space, lingual nerve is innervated to the lingual gingiva and the mucosa of mouth floor, and is responsible for the general sensation of the anterior two thirds of the tongue. So, the injury of the lingual nerve during an anesthesia or surgery in the retromolar area may cause complications such as a numbness, a loss of taste of the tongue and the other dysfunctions. Therefore, to find out the morphology and the course of lingual nerve and to clarify the topographical relationships of lingual nerve at the infratemporal fossa and paralingual space area, 32 Korean hemi-sectioned heads were dissected macroscopically and microscopically with a viewpoint of clinical aspect in this study. This study demonstrated various anatomical characteristics with relation to the course and topography of the lingual nerve in Koreans. And clinical significances based on the anatomical variations through the topography of the courses and communications between the mandibular nerve branches were described in details.
유한요소법에 의한 부식을 고려한 전동차 차체의 강도평가
김선용(Kim Sun-Yong),구병춘(Goo Byeong-Choon),임충환(Lim Choong-hwan) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
All the facility, the structure and the rolling stock have limited life so after starting use, we must decide disuse or use when it exeeds the lifetime. Currently the subway which exeeds the lifetime appeared in our country. Structural members of rolling stock structures were occurred corrosion after passage of time and It gives a many effect in the structure strength. In this study, it accomplished a structural analysis which use FEM for the No.2 subway line which operated currently, and it investigated the structural strength change which it follows with dimension change of structural members due to corrosion.
최적화 기법을 이용한 점탄성물질의 분수차 미분모델 물성계수 추정
김선용(Kim, Sun-Yong),이두호(Lee, Doo-Ho) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.12
Viscoelastic damping materials are widely used to reduce noise and vibration because of its low cost and easy implementation, for examples, on the body structure of passenger cars, air planes, electric appliances and ships. To design the damped structures, the material property such as elastic modulus and loss factor is essential information. The four-parameter fractional derivative model well describes the dynamic characteristics of the viscoelastic damping materials with respect to both frequency and temperature. However, the identification procedure of the four-parameter is very time-consuming one. In this study a new identification procedure of the four-parameters is proposed by using an FE model and a gradient-based numerical search algorithm. The identification procedure goes two sequential steps to make measured frequency response functions(FRF) coincident with simulated FRFs: the first one is a peak alignment step and the second one is an amplitude adjustment step. A numerical example shows that the proposed method is useful in identifying the viscoelastic material parameters of fractional derivative model.
모바일장치의 GPS를 이용한 사용자 이동경로 분석 및 이동경로 추천 시스템
김선용(Sun-Yong Kim),박범준(Bumjun Park),정재진(Jai-Jin Jung) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.2
모바일 통신 기술은 유비쿼터스 컴퓨팅 분야에서 중요한 기술 중 하나이다. 모바일 통신 기술에서 GPS 기술이 발달되고 PDA, 스마트폰등과 같은 대다수의 모바일기기에도 GPS기능이 탑재되고 있다. 이에 사용자들은 자신이 위치한 곳에서 위치를 기반으로 하는 서비스를 통해 여러 정보를 주고 받을 수 있게 되었다. 본 논문에서는 모바일기기에 탑재된 GPS기능을 이용하여 사용자의 위치를 추적하여 이동경로를 파악하는 시스템과 축적된 사용자의 이동경로를 이용하여 이동경로를 추천하는 방법을 제안하고 제안된 방법의 시스템을 설계한다. 제안하는 서비스는 사용자의 위치를 추적하여 사용자가 이동한 이동경로 데이터를 만들고 서버에 업로드한다. 업로드 된 이동경로 데이터들은 현재 위치한 곳으로부터 이동할 목적지 까지 가고자 하는 사용자에게 추천된다. 제안하는 서비스는 사용자가 잘 모르는 장소를 이동할 때나 목적지까지 이동경로를 기억을 못하는 경우 등에서 유용하게 사용가능하다. Mobile communication technology in the field of ubiquitous computing is one of important technologies. The development of GPS technology in mobile communications technology and PDA, the vast majority of mobile devices such as smart phones also being equipped with GPS functionality. This user where they are located where they are based on the number of through services were able to receive information. In this paper, mounted on a mobile device user's location using GPS capabilities to track the migration routes and the accumulated user to determine the migratory path of the system used to recommend the proposed route of the proposed method and system Designs. The services offered by tracking the location of the user to move the user to route data to create and upload to the server. Upload a migration path to move data from where they currently reside to the user is recommended to go to your destination. The services offered by the users do not know where to travel or go to your destination, etc. If you do not remember the path can be useful.