경동맥 협착을 동반한 Takayasu 혈관염에서 경피적 스텐트 삽입술 : 단기 및 추적관찰 결과 Early and Long-Term Follow-up Results

편육범,윤영섭,박경진,김소영,심원흠 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.5

高等敎育의 需要에 대한 勞動市場論的 分析

이욱범 건국대학교 1993 대학원 학술논문집 Vol.37 No.-

The purpose of this study is to find out why they want higher education in Korea. For this purpose I examined with a critical view the Labor Market Theory, which justify their great desires for higher education. This thesis consists of four chapters. In chapter Ⅱ, I described the economic value of education and my point of view in analysis. In chapter Ⅲ, I analyzed, and then advanced my opinons on, the Labor market Theory, which was developed to explain the peculiar phenomenon of Korean peoples desires for higher education. Finally, chapter Ⅳ, was various theories and their universal validities. In these investigations, I came to this comclusion : Among the various theories such as Human Capital Theory, Job Competition Model, Screening Hypothesis, Duel Labor Market Theory, and Radical Theroy, the first two, considering actual Korean situations, the most resonable and persuasive. One of the two, Human Capital Theory, says that human capital investment will make an increase in knowledge and technique, which will advance productivity and, as a result, lead to income increase. For this reasion, the theory argue, too, the demand for higher education is great. After I examined the factors having influenes on the higher education demand by the method of Regression Analysis, Human Capital Theory, when considering the average wage of the college-bred laborer, is considerably valid and realistic.(Its R Square is. 95167) The other, Job Competition Theory, argue that the employer will prefer a laborer who will cost him less train expense(According to this theory, the differences in individual abilities com from those of train expenses). The increase in higher education demand, therefore, causes substitutional employment, which means the phenomenon that job occupied formerly by low educated workers. These arguments are also valid and reasonable. These labor market theories, however, are too partial to explain our peculiar desires for higher education and our complex social phenomenon. In our conutry, I believe, our aspiration after high education will keep high for the time being. For there are many various influences, which connot of school age, a tendency to see education as a hired of consumption goods and the social atmosphere of regarding educational attainment as social position, In addition, long-lasting in colleges.

정중과잉치로 인해 회전된 상악 중절치의 치험례

이범의,김영재,김정욱,장기택,이상훈,김종철,한세현 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

정중과잉치의 원인은 잘 알려지지는 않았지만 dental lamina의 hyperactivity에 의해 발생한다는 가설이 가장 많이 받아들여지고 있다. 이러한 정중과잉치의 병발증으로는 주변 영구절치의 맹출 장애, 만곡 치근, 치근흡수, primordial 혹은 follicular cyst의 형성, 회전, 이환된 부위의 총생 및 비정상적인 정중이개를 일으킬 수 있다. 이러한 이유로 영구전치의 회전이 야기되면 보통 공간의 부족은 적거나 없으며 재발이 흔하므로 과개선이 요구된다. 재발의 방지를 위해서는 조기치료, 과개선, 긴 보정기간, 적절한 접촉면의 형성, 짝힘의 사용, 그리고 수술적인 방법 등이 제안되어왔다. 이에 저자는 정중과잉치로 인하여 심하게 회전된 상악중절치를 주소로 내원한 환아에서 교정적, 외과적 술식을 이용하여 양호한 결과를 얻은 두 증례를 보고하는 바이다. The etiology of mesiodens is unknown but the most widely accepted theory is the hyperactivity of the dental lamina. Complications of mesiodens are delayed or prevented eruption of maxillary central incisors, displacement or rotation of permanent teeth, crowding of affected region, abnormal diastema or permanent space closure, dilaceration or abnormal root development of permanent teeth, primordial or follicular cyst formation, root resorption of adjacent teeth, eruption into nasal cavity. If mesiodens rotate the maxillary central incisors, space deficiency is not common and relapse is very common. So overcorrection is needed. To prevert the rotational relapse, early treatment, overcorrection, long retention period, properly formed proximal surface, use of coupled force, and surgical techniques have been suggested. The authors present two cases, whose chief complain were severely rotated maxillary incisors by mesiodens, treated by orthodontic and surgical technique and showed good results.

악성 갑상선 우연종의 임상상 및 초음파 소견의 진단적 가치

강한욱,김광원,이병완,강보현,김형훈,김범진,정재훈,민용기,이명식,이문규 대한내분비학회 2002 Endocrinology and metabolism Vol.17 No.5

연구배경: 최근 갑상선 초음파 검사의 빈번한 시행으로 갑상선 우연종의 발견이 증가하고 있다. 이러한 갑상선 우연종은 임상적으로 어떻게 접근하고 치료를 해야 하는지 적지 않은 문제가 되고 있다. 본 연구에서는 직경 1.5㎝ 이하의 갑상선 우연종의 유병률, 입상적 특징 및 초음파 특성, 그리고 가장 효율적인 진단적 접근에 대해 알아 봤다. 방법: 1999년 1월부터 2000년 12월까지 삼성서울병원 내과 및 일반외과로 갑상선 결절을 주소로 내원한 1457명을 대상으로 후향적 연구를 시행하였다. 우연히 발견된 직경 1.5㎝ 이하의 갑상선 결절을 가지는 환자들에서 갑상선 결절의 촉지 유무, 갑상선 기능검사, 항갑상선 항체, 갑상선 초음파 및 미세침 흡인세포검사, 99m^Tc 갑상선 스켄, 수술 조직검사 및 병기를 검토하였다. 결과: 분석한 갑상선 결절 1475예 중 갑상선 우연종의 유병률은 13.4%(198예)였다. 갑상선 우연종에서 악성률은 28.8%(57예)으로 나왔다. 양성 및 악성 갑상선 우연종에서 나이, 성별, 갑상선 기능검사, 결절 크기에는 의미 있는 차이는 없었다. 갑상선 스켄은 갑상선 우연종의 감별에 적합하지 않았다. 갑상선 결절의 초음파 지표 점수만이 양성 및 악석 갑상선 우연종의 감별에서 초음파 지표 점수의 민감도는 88.9%, 특이도는 74.4%, 양성 예측률은 92.4%로 나왔고 진단적 정환도는 85.5%였다. 갑상선암으로 수술을 받은 50명중 stage 1은 34명, stage 2는 6명, stage 3은 10명으로 대부분의 악성 갑상선 우연종은 낮은 TNM 병기로 나타났으나, 상당수에서는 국소 침범의 소견을 보였다. TNM 병기의 3기 환자 전부는 45세 이상이였고, 주로 갑상선암의 피막 침범에 의한 것이었다. 임파절 전이는 6명의 환자에서 나왔다. 결론: 악성 갑상선 우연종은 비교적 흔히 접할 수 있는 질환이며 양성 우연종과는 임상적으로 구별이 안 된다. 악성 갑상선 우연종은 발견 당시 대부분 낮은 병기이나, 갑상선의 피막 침범 및 임파절 전이가 상당수에서 발견되었다. 갑상선 우연종의 초음파 소견은 향후의 진단 방향을 제시하는 중요한 길잡이가 될 수 있다. 초음파 지표 점수 2점 이상의 갑상선 우연종에서만 초음파 유도 미세침 흡입검사를 권장한다. Background: High-resolution ultrasonography has made the detection of asymptomatic small thyroid possible. Recent increases in the detection of incidentalomas have created a clinical dilemma on how to properly manage such incidental nodules. We investigated the prevalence, clinical and ultrasonographic characteristics, and optimal diagnostic approach toward incidentally detected benign and malignant thyroid nodules of less than 1.5㎝ in size. Methods: A retrospective review was undertaken on the 1,475 patients who had visited Samsung Medical Center, Seoul Korea between January 1999 and December 2000. The review consisted of a physical examination of the thyroid gland, thyroid function test, antithyroid antibodies, thyroid ultrasonography, fine-needle aspiration biopsy, pathology and TNA staging of the incidentally detected thyroid nodules of less than 1.5㎝ in size. Results: The prevalence of thyroid incidentalomas was 13.4% and the malignancy rate within them was 28.8%. There were no significant differences in age, sex, thyroid function test and size between the benign and malignant incidentalomas. Ultrasonographic characteristics showed meaningful diagnostic value for the detection of malignancy in incidentalomas. Most malignant incidentalomas were of a low stage. Conclusion: Occult thyroid cancers are fairly common finding. There are no clinical difference between benign and malignant thyroid nodules less than 1.5㎝; however, ultrasonographic findings can be used to decision of optimal management strategies (J Kor Soc Endocrinol 17:649∼656, 2002).

32인치 LCD TV용 면광원 램프의 최적 구동에 관한 연구

김범준,노정욱,홍성수,사공석진 국민대학교 생산기술연구소 2004 공학기술논문집 Vol.27 No.-

Characteristic properties of backlight arraying electrodeless fluorescent lamps assembled with capacitive coupled electrode connector have been investigated in various frequencies with a switching inverter. In the backlight of a 17-in diagonal with 12 lamps driven by square pulses, the efficiency of 100 lm/W and the luminance of 10000~14000 cd/㎡ have been achieved in the frequency range of 20~60 kHz where the higher frequency provides the lower operating voltage in the range of 2~4 kV.

외국어 교육과 미디어

한범욱 한국외국어대학교 외국어교육연구소 1999 외국어교육연구 Vol.- No.13

임시 금관용 비귀금속 합금의 전기화학적 부식에 관한 연구

김정욱,임범순,김철위 서울대학교 치과대학 치과생체재료학교실 1994 치과생체재료학 논문집 Vol.2 No.1

The employment of base metal alloys as substitutes of gold alloys is gaining increasing popularity. The corrosion of dental base metal alloys was recoginzed due to the nature of the oral environment. Corrosion of dental meterials in the mouth can affect the mechanical properties, esthetic properties and efficiency of dental metallic restorations, and has great influence upon the local and systemic health of the patient. The researches on the harmful effect of dental base metal alloys and their corrosin products on the human body are progressed actively. The electrochemical corrosion studies in vitro were done to predict the corrosion behavior of dental alloys in vivo, but the result may be different depending on the corrosion environments. As the normal range of inorganic ions and organic molecules in saliva is various with patient, in vivo corrosion behavior may be different depending on the patients. It may result in interindividual differences on corrosion behavior even though the restorations were made of the same alloy. The purpose of this experiment was to evaluate the difference in corrosion behavior of dental base metal alloys for temporay crown when the concentrations of organic compounds in the artificial saliva were varied. The materials used in this study were the modified Fusayma's artificial saliva (pH. 6.7), and the artificial saliva with organic compound additions such as polyacrylic (5㎖/1), acetic (5㎖/1), citric (2 g/l) and lactic acid (5㎖/1). Totalof four kinds of dental base metal alloys for temporary crown; two kinds of stainless stel alloys (SSP: 17% Cr-12% Ni-67% Fe, INC : 17% Cr-9% Ni-68% Fe), nickel-chromium alloys (APC : 90% Ni-5.5% Ni-4.5% Cu), and aluminium alloys (APC : 99% Al-0.5% Fe-0.1% Cu), were studied. Specimens were 0.2㎜ thick and had surface area of 1 ㎠ (or 0.25㎠). The specimens were connected to the copper wire and mounted in the self-curing acrylic resin. Embedded specimens were polished with the silicon caarbide papers up to # 2,000, then ultrasonically cleaned, and dried by clean air. After the surface oxide layer of specimens was removed at-1,500㎷(SCE) immersed in the vairous meterials, the corrosion behaviors of the specimens were studied by electrochemical hysteresis technique involving potentiodynamic polarization from - 1,000 ㎷ to + 1,000 ㎷ and reverse polarization back to -1,000 ㎷ with the scanning rate of 2㎷/sec in the aeration environment. The current density change of specimen was recorded X-Y poltter via logarithmic onverter. From the experiment, the following results werre obtained : 1. For the stainless steel specimen SSP, passivation film was formed in the artificial saliva and in the artificial saliva with organic components added electrolytes. SSp showed the good corrosion resistance in experimental electrolytes. Addition of organic components to the artificial saliva showed only minor effect. 2. The formation of passivation film on INC was unstable. It was observed that the corrosion resistance on INC was lower than that of SSP. 3. In the nickel-chromium alloys specimen APC, the possibility of passivation film formation was lower than in the stainless steel specimens SSP and INC. It causes lower corrosion resistance than that of SSP and INC. 4. In the aluminium alloys specimen, ATP, showed the dissolution reaction in all experimental electrolyes such as artificial saliva and artificial saliva with polyacrylic, acetic, citric, and lactic acid added.

PEI계 복합 재료를 이용한 탄자 운반체의 사출 성형 기술 개발에 관한 연구

정태형,이범재,하영욱,이성계 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-

This research covers the development of new technique for composite injection molding of high stiffness Sabot. An analysis of polymer resin is performed by means of making test specimen mold and doing test with accordance of ASTM test guidelines. Structural analysis and simulation of injection molding process are carried out in order not only to estimate but also to predict the characteristics of molding stresses what both product and structure of mold may have. For structural analysis software, Mold flow and LS-dyna are used and universal test machine is utilized for evaluating performance of sabot. Cases of adopting this material to sabot are not announced yet in domestic academic world. In addition to that, materials for polymer-metal mixed injection molding are imported on the whole due to deficient level of domestic technology. Therefore, this new developed injection molding technique using PEI material can make it available to ensure the technology of making mold, injection and design. Finally, this technique may be applicable to another sabot having different radius of warheads from now on.

폐경후 여성에서 내피세포 의존성 혈관이완 반응에 에스트로겐의 급성효과 및 엔도쎌린(Endothelin)-1과의 연관성

강진호,김범수,이영욱,금동극,정현욱,이혜숙,이만호,박정로 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.7

혈관 조영술을 이용한 관동맥,말초혈관,경동맥의 동맥경화성 협착병변의 빈도

최동훈,편욱범,윤영섭,장양수,심원흠 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.9