정상교합과 부정교합에서의 상·하악골과 제 1 대구치 위치에 관한 비교연구

윤병모,안병근,이건주,김선해,박영주,한호진 대한치과교정학회 1993 대한치과교정학회지 Vol.23 No.4

There has been so much controversies about the position of upper and lower jaws, and their first permanent molars in normal occlusion and Angle's class ⅠㆍⅡㆍⅢ malocclusions. So, the purpose of this study is to compare the position of upper and lower jaws, and their first molars in normal occlusion and Angle's class ⅠㆍⅡㆍⅢ malocclusions by lateral cephalometric analysis. The sample consisted of one hundred and twenty girls(thirty in each group) who had completed growth. The findings of this study were as follows : 1. In class Ⅰ malocclusion, both maxilla and mandible were slightly posterior position than normal occlusion, but they showed harmonious relationship. 2. In class Ⅱ malocclusion, the mandible was greatly retruded, and the maxilla was also slightly retruded to the cranial base as compared with normal occlusion. 3. In class Ⅲ malocclusion, the maxilla was significantly retruded to the cranial base, but no significant difference was found in mandibular position as compared with normal occlusion. 4. The maxillary first molar was located at posterior position in class Ⅱ malocclusion, and anterior position in class Ⅲ malocclusion to the cranium, so that the rotation of mandible was influenced by that. 5. The mandibular first molar showed constant relationship to the mandible in all four group, but different position to the cranial base in direct proportion to the mandibular position. 6. On the treatment planning of class Ⅲ malocclusion, it seems to be better to promote the mandibular horizontal growth by ingibiting the verbical growth of masillary molar area, and on the treatment planning of class Ⅲ malocclusion, it seems to be better to promote the antero-inferior growth of maxilla and to promote the mandibular vertical growth by inducing the vertical growth of maxillary molar area.

[논문]Operational Characteristics of CO2 Laser Adopted by Superposing-Discharge

Hee-Je Kim,Hyun-Ju Chung,Byoung-Dae Min,Jong-Han Joung,Sung- lun Park 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-

오늘날 현저한 CO2 레이저의 응용 추세에 발맞추어 보다 다양한 형태의 출력 제어 기술이 대두되고 있다. 본연구에서는multi-Pulse Superposing-Discharge 기술을 이용하여 다양한형태의 CO2 레이저의 펄스를 성형 하였다. 펄스 성형을 위한 방법으로 PIC one-chip microprocessor를 이용하여 삼중 PFN 모률의 SCR을 각각 고유의 지연시간을 가지도록 제어하였다. 실험에 사용된 삼중 PFN 모률의 전원 회로는 각각 캐패시터 인덕터,SCR,고압 펄스 트랜스 그리고 고압 트랜스 2차측에 브릿지 정류기로 구성 하였다. 고압 펼스 트랜스의 1차측을 제어하므로서 PFN 모률의 동작을 저 전압에서 수행 할 수 있다. 트랜스의 2차측에 연결된 전파 정류기는 펄스 에너지를 부하에 지속적으로 전달한다. 본 연구에서는 삼중 PFN 모률의 각각의 SCR을 다른 시간 가격을 두고 트리거 하므로서 다양한 Long pulse shaping을 실현하였다. 또한 약 250-1000μs 의 주기를 가지는 다양한 펄스형 레이저 빔을 얻었다.

관상동맥색전증에 의한 급성심근경색증 4예

김민근,주혜원,강경필,최병돈,박민석,변영섭,고충원,이건주,김병옥 인제대학교 2006 仁濟醫學 Vol.27 No.-

Acute myocardial infarction(AMI) due to coronary embolism can occur in patients with normal coronary artery. Coronary embolism is believed to be a cause of acute myocardial infarction when emergent coronary angiography shows perfectly normal coronary trees, except for the finding of coronary artery occlusion. In this report, we describe four patients with AMI due to coronary embolism who were successfully treated using a thrombus aspiration device and anticoagulation, and those patients had intracardial thrombus arising from the left atrium due to chronic atrial fibrillation and valvular heart disease. Patients with chronic or paroxysmal atrial fibrillation can present with AMI due to coronary embolism, and thrombus aspiration with percutaneous aspiration device is a feasible treatment option for these patients along with anticoagulation the rapy.

半夏瀉心湯이 CCl4 로 유도된 간중독 흰쥐에 미치는 영향

朱旺錫,朴賢俊,尹炳局,鄭成伊,朴宣東 대한본초학회 1999 大韓本草學會誌 Vol.14 No.2

The purpose of this study is to observe the effect of Banhasasimtang on serum reaction in CCI₄ treated rats. In this study the experimental rats divided five group(Normal, Control, Sample A, Sample B and Sample C group) Under the same condition Normal group was fed basal diet and water, Control group was injected carbon tetrachloride(CCI₄ 0.5㎖/㎏) and basal diet for 2 weeks, Sample A group was injected carbon tetrachloride(CCI₄0.5㎖/㎏) and fed the Bahasasimtang extract(10㎖/㎏) for 2 weeks, Sample A group was injected carbon tetrachloride(CCI₄ 0.5㎖/㎏) and fed the Banhasasimtang extract(10㎖/㎏) for 2 weeks, Sample B group was fed the Banhasasimtang extract(10㎖/㎏) for 2 weeks and injected carbon tetrachloride(CCI₄ 0.5㎖/㎏), Sample C group was fed the Banhasasimtang extract(10㎖/㎏) for 2 weeks. The change of GOT, GPT, γ-GPT, ALP, LDH activity and Bilirubin level in blood serum. The obtained results are summarized as follows : 1. In the change of GOT GPT contents, as compared with control group, sample group was significantly decreased. 2. In the change of γ-GPT contents, as compared wth control group, sample group was significantly decreased. 3. In the change of ALP contents, as compared with control group, sample group was significantly decreased. 4. In the change of LDP contents, as compared with control group, sample group was significantly decreased. 5. In the change of Bilirubin contents, as compared with control group, sample group was significantly decreased.

지오그리드 보강토 옹벽에 관한 유한요소해석

주재우,연명옥,한상호,박병곤 순천대학교 2000 순천대학교 자연과학논문집 Vol.19 No.1

It is difficult to analyze the behavior of the geogrid reinforced soil walls, because most of the design methods for the reinforced soil structures with geogrids are based on the theory of the rigid-plasticity which takes no account of displacement and deformation of reinforcing material in the soil. In this study, the finite element analyses of geogrid reinforced retaining walls are performed to suggest an useful design method which consider the displacement and deformation of reinforcing material in the soil. The reinforcing effects on geogrid reinforced retaining wall are related with the length and interval of reinforcing materials. So the effects are analyzed with four different interval of reinforcing materials. It can be concluded from the results of analyses that the wall displacement, the earth pressure on the wall, the vertical stress distribution in the foundation and the settlement of backfill surface are decreased in direct proportion to the decrease of the interval.

자동차 타이어의 진동특성에 관한 실험적 연구

김병삼,전형주 순천대학교 공업기술연구소 1997 工業技術硏究所論文集 Vol.11 No.-

The vibration characteristics of automobile tire is studied experimentally. In order to obtain the theoretical values of natural frequency and mode shape, the plane vibration of a tire is modeled as a circular beam. Theoretical results are determined by using the Tielking method which considers tension force due to tire inflation pressure, rotational velocity, tangential and radial stiffness. Modal parameters by the inflation pressure, load and rotational velocity are experimentally determined by using frequency response function method. Results show that material property and tire wear are parameters for shift the natural frequency and the increase of sidewall stiffness caused by the load on a tire results in the increase of natural frequency of the tire, and rotational velocity of the tire has no influence on the natural frequency.

급성 충수돌기염의 조기 진단을 위한 초음파검사의 의의

오병연,임경수,이영주,김원,최옥경 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

Background: In the most of emergency department, the diagnosis of appendicitis has been carried by clinical history, physical examination and plain X-ray. But the diagnostic accuracy by these methods was so low that unnecessary operation was common performed, and sometimes the operation was delayed till the physicians could confirm the acute appendicitis clinically. Although many kinds of diagnostic tools such as CT scan, laparoscope, and etc, we believe that ultrasonography(US) would be a quick and sensitive diagnostic method for the evaluation of acute appendicitis in the Emergency Department. Methods: Forty-seven patients who were clinically suspected as acute appendicitis were evaluated with the grayscaled US by emergency physician. The probe of US was placed on maximal tender point of abdomen, and the appendix image was evaluated while probe was pressed deeply and gently. When the blind loop was found at maximal tender point of abdomen, we evaluated the diameter of appendix, the presence of compressibility, peri-appendiceal fluid collection and other mass effect. As soon as the ultrasonographic evidences of the appendicitis were noticed, the operations were done and pathologic report were reviewed later. Results: Among the forty-seven patients, forty patients were diagnosed as a appendicitis by Us, and most common ultrasonic findings were as follows; 1) non-compressible blind loop larger than 5 mm in diameter, 2) wall thickening more than 3 mm, 3) peri-appendiceal fluid collection, 4) periappendiceal mass. Among remaining 7 patients in whom we could not get any positive findings of appendicitis, abdominal CT scan was carried in 2 cases who had direct and rebound tendemess on right lower abdomen, and CT scan showed the evidences of the appendicitis. The other 5 cases without rebound tendemess were observed for 2 hours, and abdominal pain was disappeared lately. Finally forty-two patients were operated and confirmed as acute appendicitis by pathologic reports; 24 were reported as suppurative appendicitis, and 12 cases of gangrenous appendicitis, 3 cases of perforated appendicitis, and 3 cases were peri-appendiceal abscess. The specificity of US in the diagnosis of acute appendicitis was 71.4%, and the sensitivity was 95.2%. Conclusions: In some patients suspected appendicitis, emergency physicians could diagnosis acute appendicitis accurately and rapidly by use of ultrasonography. Although the US was an accurate imaging modality to diagnosis acute appendicitis and evaluate its complications, we recommend a laparotomy or abdominal CT scan in the patients with negative US findings in spite of presence of peritoneal irritation signs such as rebound tenderness and/or muscle guarding on right lower abdomen.

전로슬래그를 콘크리트용 골재로 사용하기 위한 실험적 연구

郭基柱,孫純鍾,徐炳鐵 순천대학교 공업기술연구소 1995 工業技術硏究所論文集 Vol.9 No.-

To examine the appicability of the converter slag to aggregate, tests were performed for the converter slag specimens aged with steam, and the stability of expansion was investigated. The strength of the specimen was determined through the fracture test, and the results were summarized as follow. The strength of the converter slag was found to be smaller than that of the natural aggregate. The strength of the concrete mixed with the granulate slag was increased with an increase of the content of the granulate slag. The slump value was larger for the specimen of converter slag than that for the natural aggregate. The specific weight of the converter slag was decreased with an increase of the aging peroid. The aging time for the converter slag was accessed to be about 48 hours to accommodate the full stability of the expansion. The amount of the steam needed to age one ton of the converter slag to the range of full expansion was accessed to be 60 ㎏. From the regression analysis of the correlations among the compressive strength (σ_c), tensile strength (σ_t), and flexural strength (σ_f) the following formulas were proposed. σ_t=0.150681·σ_c+4.451729 σ_f=0.1537·σ_c+30.47224

1996년과 1999년 경기지역 초등학교 학생들에서 유행성이하선염에 대한 면역도 조사

나병국,이주영,고운영,이진수,신구철,이주연,최보율,기모란,양병국,강춘,김우주,김지희 대한감염학회 2001 감염 Vol.33 No.3

Background : Although massive use of live attenuated mumps virus vaccines successfully reduced the incidence of mumps virus infection worldwide, mumps outbreaks have not been completely eliminated, even in vaccinated populations. In recent years, the incidence of mumps has been remarkably increased in Korea. This study was designed to evaluate the recent seroprevalence rate of mumps IgG among children in Kyonggi province at 1996 and 1999. Methods : Study population included students from 8 elementary schools in Kyonggi province. Serum samples were collected twice at 1996 and 1999 and tested for mumps-specific antibody by enzyme-linked immunosorbent assay (ELISA). We also conducted a questionnaire survey on the parents and collected the records including history of vaccination and mumps infection. Results : The seropositive rates against mumps were 89.47% and 89.74% at 1996 and 1999, respectively, and they were not significantly different when compared to age, sex, and region. Although the first vaccination rates were 92.17% and 92.25% at 1996 and 1999, respectively, the second vaccination rates were only 37.89% and 38.03% at 1996 and 1999, respectively. Infection rate showed no significant difference between vaccinated groups and nonvaccinated gropus. Seropositive rate of infected group was higher than that of noninfected group but it was not significantly different between the vaccinated and the nonvaccinated. Conclusions : This study showed the seropositive rate and vaccination against mumps in children. There were no significant relationships between vaccination and infection. Therefore, it seems likely that the vaccination is not fully protective against mumps infection. This study will be helpful for the establishment of guideline for prevention and treatment of mumps in Korea. (Korean J Infect Dis 33: 157∼164, 2001)

分布 移動 荷重을 받는 無限보에서의 音響放射

전형주,김병삼,방두열 순천대학교 공업기술연구소 1998 工業技術硏究所論文集 Vol.12 No.-

The problem of sound radiation from infinite elastic beams under the action of harmonic moving line forces is studied. The reaction due to fluid loading on the vibratory response of the beam is taken into account. The beam is assumed to occupy the plane z=0 and to be axially infinite. The beam material and elastic foundation are assumed to be lossless and to follow Bernoulli-Euler beam theory including a tension force (T), damping coefficient (C) and stiffness of foundation (K_S). The non-dimensional sound power is derived through integration of the surface intensity distribution over the entire beam. The expression for sound power is integrated numerically and the results are examined as a function of Mach number(M), wavenumber ratio(r) and stiffness factor(T). Here, the purpose is to explain the response of sound power over a number of non-dimensional parameters describing tension, stiffness, damping and foundation stiffness.