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Modified Widman Flap과 Modified Flap 후의 치료효과에 관한 임상적 비교연구
홍성우,박영채,이광수,유형근,신형식,Hong, Sung-Woo,Park, Young-Chae,Lee, Kwang-Soo,You, Hyung-Keun,Shin, Hyung-Shik 대한치주과학회 2000 Journal of Periodontal & Implant Science Vol.30 No.1
Periodontal surgery can be directed to remove the irritants from the tooth surface and reduce the periodontal pocket. The purpose of this study is to compare the clinical effects after between modified Widman flap and modified flap in periodontal patients. Ninety six molar area teeth of 9 patients were used. One of sextants performed a modified Widman flap, while the other side performed a modified flap. After initial periodontal therapy, the following measurements prior to surgery(baseline) were taken : pocket depth, gingival recession, clinical attachment level, tooth mobility, bleeding on probing. Also these measurements were taken at 4 weeks, 8weeks, and 12 weeks after surgery. Significant decrease of pocket depth was shown in both techniques, and the degree of decrease was significant in modified flap than modified Widman flap at 12 weeks. Significant increase of gingival recession was shown in both techniques, and the degree of increase was significant in modified Widman flap than modified flap at 4 weeks, 8 weeks, and 12 weeks. Significant attachment gain was shown in both techniques, and the degree of increase was significant in modified flap than modified Widman flap at 4 weeks, 8 weeks, and 12 weeks. Significant increase of tooth mobility was shown in both techniques at 4 weeks, but the decrease of tooth mobility was shown at 12 weeks. Greater decrease of bleeding on probing was shown in both techniques at 4 weeks. Modified flap was better than modified Widman flap in the decrease of gingival recession and the attachment gain. These results indicate that modified flap operation is better than modified Widman flap operation in the effect of periodontal treatment.
저속 후방 추돌 자원자 실험을 통한 두부와 경부의 동작분석
홍성우,박원필,박성지,유재호,공세진,김한성,Hong, Seong Woo,Park, Won-Pil,Park, Sung-Ji,You, Jae-Ho,Kong, Sejin,Kim, Hansung 한국자동차안전학회 2012 자동차안전학회지 Vol.4 No.2
The purpose of this research is to obtain and analyze dynamic responses from human volunteers for the development of the human-like mechanical or mathematical model for Korean males in automotive rear collisions. This paper focused on the introduction to a low-speed rear impact sled test involving Korean male subjects, and the accumulation of the motion of head and neck. A total of 50 dynamic rear impact sled tests were performed with 50 human volunteers, who are 30-50 year-old males. Each subject can be involved in only one case to prevent any injury in which he was exposed to the impulse that was equivalent to a low-speed rear-end collision of cars at 5-8 km/h for change of velocity, so called, ${\Delta}V$. All subjects were examined by an orthopedist to qualify for the test through the medical check-up of their necks and low backs prior to the test. The impact device is the pendulum type, tuned to simulate the crash pulse of a real vehicle. All motions and impulses were captured and measured by motion capture systems and pressure sensors on the seat. Dynamic responses of head and T1 were analyzed in two cases(5 km/h, 8 km/h) to compare with the results in the previous studies. After the experiments, human subjects were examined to check up any change in the post medical analysis. As a result, there was no change in MRI and no injury reported. Six subjects experienced a minor stiffness on their back for no more than 2 days and got back to normal without any medical treatment.
그래픽 시스템과 관계 데이타 베이스 시스템간의 인터페이스를 위한 버젼관리를 지원하는 Data Model의 설계
홍성우(Sung-Woo Hong),최윤철(Yoon-Chul Choy) 한국정보과학회 1987 한국정보과학회 학술발표논문집 Vol.14 No.2
Computer graphics 응용 소프트웨어는 몇가지 구성요소로 이루어진다. 그중 하나가 data modeling 요소이다. 그러나 graphics 응용에 따라 data modeling 방법이 상이하기 때문에 다른 관련된 graphics 응용의 data model과의 통합이나 데이타공유가 어렵다. 또한 시간과 버젼에 따라 조금씩 변하는 picture 의 효율적 관리가 요구된다. 이러한 문제점을 해결하기 위하여 DBMS 와 interactive graphics system 간의 interaface 모델을 제시한다. 이 interface는 complex object 의 계층적 구조를 이해하고 version control 을 효율적으로 지원할 수 있는 semantic data model 을 핵심으로 하고 있다.
홍성우(Hong Sung-Woo),이현철(Lee Hyun-Chul),고성석(Go Seong-Seok) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.3
Recently, high-rise combined residential-commercial facilities project are promoted in metropolitan area and even in middle towns in order to provide convenient houses and to utilize land effectively. But, this project has many uncertainties and risks since it needs different concept and goal, comparing with single dwelling project and commercial project. It is too important to cope with these uncertainties and risks, because these are related with projet's success closely. So, it is necessary to study influential factors related with various environmental concerns, from the feasibility study to the end of the project in order to make this project an high profitability. The main purpose of this study is to suggest objective direction in feasibility study of combined residential-commercial facilities which could make project successful. In this point of view, this study carried out an analyzing the evaluation factors and risks based on previous studies, and deduced influential elements for the upcoming feasibility valuation. Ultimately, this study suggested the counterplan in the feasibility evaluation stage, by investigating and analyzing important factors using AHP(Analytic Hierarchy Process) and FMEA(Failure Mode and Effect Analysis) method.