어지러움증 환자의 임상 및 검사소견에 관한 연구

이향운,박기덕,최경규 대한신경과학회 1997 대한신경과학회지 Vol.15 No.1

카본/에폭시 복합제 수용기계용 추진축의 강도특성에 관한 연구

여운기 철도전문대학교 2003 論文集 Vol.18 No.-

Composite propeller shafts for a vehicle have major advantages such as reduction of vibration, noise, and weight. A propeller shaft was designed with a carbon/epoxy composite material using the finite element method(FEM), and prototype shafts for tests were manufactured by the filament winding manufacturing process. In order to verify the design procedure by FEM, two kinds of experimental tests were carried out using a FFT analyzer with impact hammers and a critical speed measuring apparatus for measurement of natural frequencies and critical speeds. The difference between the FEM analysis result and the test result was less than 3.4%, showing FEM analysis results to be acceptable. The parametric study was focused on determining the factor affecting the strength characteristics of the propeller shaft based on FEM. In investigation of the change in natural frequency without an increase in propeller shaft weight, it was found that the winding angle is the most significant factor affecting the strength characteristics.

불소 국소도포가 복합레진 수복물의 접착강도 및 표면구조에 미치는 영향에 관한 비교연구

김용기,조운행 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.1

The purpose of this in vitro study were to evaluate the possible influences of topical fluoride application on bond strength and surface texture of composite resin restoration. Universal testing machine(Model No.4204, Instron) was used to measure the shear bond strength and surface changes were investigated through scanning electron microscope(JSM-5200. JEOL. JAPEN). The summary of results obtained from the present experiment were as follows: 1. The bond strengths of all groups decreased with time. 2. The mean bond strength of group Ⅱ was significantly less than those of group Ⅰ and Ⅲ(p<.05). 3. A majority of bond failure occurred at tooth-resin interface of samples. 4. APF produced a negative effect on resin surface with or without protecting agent application. whereas NaF did not. 5. The resin glaze treatment provided superior surface protecting effect microscopically to bonding resin treatment within the present experimental period. 6. The results of this study indicate that the resin surface should be covered with protecting agent prior to APF topical application and that APF should not be applied before acid etching when the bond strength of resin is considered.

Othello에 나타나는 여성들의 전복성

성기운 성결대학교 인문과학연구소 2000 人文科學論叢 Vol.5 No.-

In the Shakespearean age, the English society was based upon a strong patriarchy in which each household had its head, who in theory at least, expected obedience in his small helm. Fathers enjoyed the quasi-absolute authority of a despot in that feudal world. Any disobedience to the patriarchal authority was regarded as a challenge against the social order and the Establishment. Literature, in a way, can be viewed as an artistic response to the historical and social situation of a certain age. In this sense, the marital relationship between a Moor and a woman from a noble family as in Othello, reflects the possible distortion of the patriarchal system, which maintained the traditional values of thezabethan period. This paper aims to review the male chauvinistic ideology in Othello as well as the possibility and the limitation of women who seek to subvert that male-centered social system.

RIETAN 시뮬레이션에 의한 YBCO 초전도체 결정구조 전이에 관한 연구

이상운,채기병,소대화 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this study, we have tried to focus on the practical use of YBCO high temperature superconductor as an excellent part in electronic field. When we verify the characteristic improvement of superconductance and accurate reproduce and so forth, we made use of RIETAN, we changed the lattice constant and oxygen content from 6.0 to 7.0 as for the transition of orthogonal structure and tetragonal structure at superconductor, at the result we proved that transition from tetragonal structure to orthogonal structure was made at the point of 6.6(oxygen content) by using the simualtion. In addition, we proved that the transition peak of structure is transient from 2θ=32.587。 to 2θ =32.908。 at the tetragonal peak. and is transient from 2θ=32.877。 to 2θ= 32.908。. at the tetragonal peak. Also, major oxygens are located at O(2) and O(3) at tetragonal structure and are located at O(3), O(4), and O(5) at orthogonal structure, when tertagonal structure is converted into orthogonal structure. At the result of above passage, we verified that the transition point of oxygen-ion orthorhombic critical Point is 6.6.

Measure for Measure 에 나타난 전복과 봉쇄

성기운 聖潔大學校 人文科學硏究所 1999 人文科學論叢 Vol.4 No.-

This dissertation aims to investigate Shakespeare's Measure for Measure. In particular, the concepts of subversion and containment suggested by Stephen Greenblatt, a forerunner of the New Historicism have been used to analyze it. The critics who believe in New Historicism(the newly-farmed historical approach to literary criticism) think that literary works only served the interests of the established ruling class. They go so far as to maintain that rulers have taken advantages of the literary works for the specific purpose of enlarging their political influence. Against such a backdrop, it might be quite natural that Shakespeare's plays which have been regarded as literary canons are major taget for the New Historicism. In Measure for Measure, Shakespeare gives the Duke Vincentio full authority. So he can efficiently block the the challenging elements in Vienna. But Shakespeare also provides the possibilities of subversion that contest such authority in Measure for Measure.

철도차량용 차륜의 응력해석에 관한 연구

여운기 한국철도대학 2005 論文集 Vol.20 No.-

There are many fatigue damages which are grown by mechanical load caused by the contact with rail and thermal load produced from the friction of brake for stopping in the wheel during service. Therefore, to assure the railway vehicle's safety, the three dimensional stress analysis of the wheel for railway rolling stock was evaluated. In this study, stress distribution under mechanical and thermal load through finite element analysis was investigated. Based on the result of the stress analysis, maximum stress of the wheel was estimated to 200MPa in the curvature part of plate. Moreover, the weak position of the wheel in service was the hub fillet, which was under bending stress state.

보의 非線型 解析에 관한 硏究

呂運起 단국대학교 대학원 1980 學術論叢 Vol.4 No.-

In order to analyze nonlinear problems of a beam by the finite element method, the nonlinear term has been added to the Strain-displacement relations. And by the principles of energy, governing equation, which includes the incremental stiffness matrix has been derived. For the simple calculation, a cantilever beam has been treated and the governing equation is partitioned according to the boundary conditions. The deflection of the free end, the result of this study, is tabulated and plotted to compare with those of linear analysis. It is found that, for a equal increase of distributed load q, the increment of displacement from this study is much less than that of linear analysis.

고정밀 kinematic 측량을 위한 다중 수신기를 이용한 다중경로 오차의 검출과 소거

박운용,이기부,이인수,김진수 東亞大學校 1998 東亞論叢 Vol.35 No.-

The GPS to he designed for military flight as it has released for people since 1983, has been applied to most part of engineering. Above all, it had influence on Geodesy for accurate positioning. The reason is that it makes the concept and the method of established positioning for long time to be changed. 13est merits of GPS surveying are not to be cramp from weather condition and to have speed, accuracy and economical efficiency. In addition, newly various measurement methods are developed to adjust to any condition that makes its utility to be increasing. Highly accurate measurement method as like this GPS-aided aerial triangulation, car Navigation is demanded the accuracy of a few centimeter. This paper was determinated that the multipath generated at the mobile receiver when the reference receivers were fixed, the mobile was continuously moving. After generated multipath is reduced in the data processing, it is repeatly reduced to conjunction with network adjustment and kinematic. In this method, 3D RMS is reduced to 30% in the single difference code solution. This method can be used in conjunction network adjustment as well as another method and expected more than above results.

3차 의료기관에 입원한 노숙환자에서 감염질환의 유병율

함세운,남기석,노혜진,홍경득,황래석,방지환,신형식 대한감염학회 2007 감염과 화학요법 Vol.39 No.4

목적 : 3차 의료기관에서 입원치료를 받았던 노숙자를 대상으로 감염성 질환의 유병율을 알아보고자 하였다. 재료 및 방법 : 2002년 1월부터 2004년 8월 사이에 국립의료원에서 입원 치료를 받았던 269명의 노숙자 환자들을 대상으로 의무기록을 조사하였다. 결과 : 연구 기간동안 입원치료를 받은 총 269명의 노숙자 환자 중 남자가 249명(92.9%), 여자가 19명(7.1%)이었다. 감염질환의 유병율은 B형 간염이 228명 중 15명(6.6%), C형 간염 113명 중 8명(7.1%), 결핵은 269명중 19명(7.1%), VDRL 양성인 경우는 234명 중 25명(10.7%), 항사람면역결핍바이러스항체 양성은 130명중 2명(1.5%)이었다. B형 간염표면항원에 대한 항체 형성자는 118명(51.7%), 항체 미형성자는 95명(41.7%)이었다. 결핵으로 진단된 19명 중 객담도말 및 배양검사와 조직검사로 확인된 경우가 14명, 균음성이나 임상적으로 의심되는 경우가 5명이었다. 간질환 및 관련된 합병증으로 입원한 환자 28명 중 B형 및 C형 간염바이러스에 관련된 경우는 5명(17.9%)에불과하였고 결핵은 19명중 13명(68.4%)이 폐결핵 및 림프절종대의 증상으로 입원치료를 받았다. 복합 감염의 경우는 총 9명이었는데 후천면역결핍증후군 환자였던 2명중 1명이 결핵에 이환되어 있으면서 VDRL 양성소견을 보였고 다른 1명이 HIV와 결핵의 동시감염이었다. 결론 : 노숙자 입원환자에서 결핵, C형 간염 및 매독의 유병율이 일반 인구에 비해 높았다. 노숙자환자를 담당하는 의료인력를 보호하고 환자의 감염질환 유무를 파악하기 위해 적절한 선별검사가 필요하며 감염질환의 확산을 방지하기 위한 정부의 적극적인 대책이 필요하다. Background : Despite the expected high prevalence of several infectious diseases among the homeless, a majority of them have not received screening test and early treatment. Materials and Methods : The subjects of this study were 269 homeless patients who had been hospitalized in the National Medical Center (Korea) between January 2002 and August 2004. Their medical histories and records were reviewed to analyze the prevalence and clinical characteristics of hepatitis B and C, syphilis, tuberculosis and HIV infection among them. Results : The entire 269 homeless patients being hospitalized during the period of this study consist of 249 male patients and 19 female patients. For the prevalence of infectious diseases, HBV was seen in 15 of 228 patients (6.6%); HCV in 8 of 113 patients (7.1%); VDRL positive in 25 of 234 patients (10.7 %); HIV antibody positive in 2 of 130 (1.5%); and tuberculosis in 19 of 269 (7.1%). The number of patients who had the antibody to hepatitis B was 118 (51.7%). Of 28 patients hospitalized with the chief complaints of liver diseases and/or their complications, the number of cases infected with hepatitis B and C viruses was only 5 (17.9%). On the other hand, for patients with tuberculosis, 13 of 19 cases (68.4%) were hospitalized with the chief complaints associated with symptoms of pulmonary tuberculosis or enlarged lymph nodes. The number of patients with multiple infectious diseases was 9 in total. Conclusion : As expected, the prevalence of some infectious diseases were higher among the homeless inpatients, than non-homeless population. Proper screening tests in order to determine the presence of any infectious diseases among the patients and protect involved medical staff are necessary. Further, the government should take proactive measures to prevent the spread of infectious diseases in the aspect of public health.