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.

폐촉매로 부터 유가금속의 분리 , 회수

홍성우,김성훈,양종규,전성균,김종화,이성식 ( S . W . Hong,S . H . Kim,J . G . Yang,S . G . Jeon,J . H . Kim,S . S . Lee ) 한국화학공학회 1994 추계학술발표논문집 Vol.- No.-

상안면부 골절에 관한 방사선학적 비교 연구

홍성우,고광준,Hong Seong-Woo,Koh Kawng-Joon 대한영상치의학회 1995 Imaging Science in Dentistry Vol.25 No.2

The subjects of this study consisted of 58 patients with Le Fort fractures, who were admitted to Chonbuk National University Hospital from Jan. 1988 to Oct. 1995. The author classified the maxillofacial fractures by Le Fort classification and examined the. incidence of Le Fort fractures by age, sex and etiology. The purpose of this study was to compare the imagings of conventional radiograms with those of computed tomograms and to aid in the diagnosis of patients with Le Fort fractures. The obtained results were as follows: 1. The Le Fort fractures occured mainly in 3rd and 4th decades, but there was no significant difference between decades. A ratio of men to women was 5.5 : 1. The major etiologic factors were traffic accident(69%), assault(14%) and fall-down(12%). 2. The most common type of Le Fort fracture was type I(49.3%). The numbers of Le Fort II, ill fractures were 41.3%, 9.4% respectively. And 8.6% were midsagittal splitting fractures. 3. The discontinuity and haziness of the maxillary sinus were easily detected by Waters' view. In skull PI A view, it was difficult to observe fractures due to overlapping of the other structures, but the haziness of the maxillary sinus was sometimes observed. 4. In Le Fort fracture, the fracture pattern of orbit, the wall of maxillary sinus, nasal bone and pterygoid plate were more easily detected in computed tomograms than in conventional radiograms.

연구논문 : 청년일자리사업 평가와 개선방안: 광주광역시와 전라남도의 사례

홍성우 ( Seong Woo Hong ) 전남대학교 지역개발연구소 2012 지역개발연구 Vol.44 No.1

We evaluated projects against youth unemployment in Gwangju and Jeonnam according to job creation and quality of created jobs. Most projects began with “local governments” public announcement of job creation protrams” in 2010. And most created jobs were temporary. We make some suggestions to make better the performance of those programs. First, budget of central government for local employment must increase and each program must be budgeted steadily from a long-term perspective. Second, contract organizations should be supported more enough to be independent financially. Third, projects should be got better to be more efficient, demander-friendly, and local oriented.

동아시아 지역의 국제화와 노동자 인권

홍성우(Seong-Woo Hong),조담(Dam Cho),이규용(Kyu Yong Lee) 한국고용노사관계학회 2001 産業關係硏究 Vol.11 No.2

The more international capital flowed among countries since mid-1980s, the more globalized the world became. We analyzed the effects of globalization on the core labor standards - discrimination, child labor, freedom of association and rights of collective bargaining - of workers in Singapore, Thailand, Malaysia, Philippines and Indonesia. Proponents for linkage of international labor standards to trade insist that globalization cause the race to the bottom. Developing countries have the opposite opinions against the linkage. We think that improvement of the labor standards depend upon relationship with economic efficiency. The smaller discrimination and less child labor may make the nation more efficient in the long run and come true in the course of globalization. We found that the hypothesis is true in 5 countries. But improvement of freedom of association and rights of collective bargaining do not guarantee economic efficiency. We found that they worsened the two rights to attract the more foreign capital. This study has some implications about the linkage of international labor standards to trade. Enforcement of forced labor, child labor and discrimination may succeed without big resistance of developing countries. But it may be very difficult to enforce freedom of association and rights of collective bargaining.

Livedo Vasculitis

홍성우(Sung Woo Hong),이창우(Chang Woo Lee),김중환(Joong Hwan Kim),유태연(Tae Yun Yoo) 대한피부과학회 1983 대한피부과학회지 Vol.21 No.5

Livedo vasculitis or vasculitis of atrophie blanche is a clinical entity which can be distinguished from cutaneous vasculitis by distinctive pathology and immunopathologic study. A 18-year-old female with erythematous, telangiectatic, purpuric or hyperpigmented patches, intermingled with white atrophic ivory patches on her legs of 3 years duration was seen in June 3, 1982. The histologic examination of an atrophic patch showed proliferation and occlusion of blood vessels in the upper dermis with patchy atrophy of the epidermis. The immunopatbologic features of an atrophic patch revealed deposits of IgM, Ca and fibrin as a definitive immunofluorescence vessel pattern. This suggests that the livedo va.sculitis or vasculitis of atrophie blanche may he considered one of the immune vasculitides. This patient had received aspirin and persantine for 4 months, and moderate therapeutic effects could be noticed.

도시화지역 환경갈등의 협력적 해결방안 적용가능성 탐색

홍성우 ( Sung Woo Hong ),허훈 ( Hoon Huh ) 단국대학교 분쟁해결연구소 2013 분쟁해결연구 Vol.11 No.1

간세포암절제후 장기생존한 38예에 대한 분석

홍성우 ( Seong Woo Hong ),나양원 ( Yang Won Nah ),이혁상 ( Hyuck Sang Lee ) 대한간암학회 2001 대한간암학회지 Vol.1 No.-

지방대학 여대생의 노동시장 이행과정 분석

홍성우(Hong Seong-Woo) 한국지역사회학회 2012 지역사회연구 Vol.20 No.1

This paper examines determinants of attach rate and wage differentials of local university women graduates' school to work transition comparing with Seoul metropolitan ones. We use GOMS(Graduates Occupational Mobility Survey) 2008 produced by Korea Employment Information Service. Three employment attach rates (employed, employed by the other employers, and employed by giant companies) are estimated by probit model. Wage function is estimated by OLS, and Oaxaca decomposition analysis is used for wage differentials. Our main findings are as follows. Firstly, we can not find any difference of three attach rates of school to work between local university women graduates and Seoul metropolitan ones, different from raw rates. Secondly, location of attended university is statistically significant in making wage differentials. This means LUWG can not get jobs with the same pay as Seoul metropolitan ones. Thirdly, we decompose wage differentials and find that the effects of different coefficients are larger than those of different individual characteristics between two groups. It implies the possibility of university location wage discrimination. Fourthly, efforts of students and universities for getting good jobs are effective in improving employment success rates and wages.