상악골에 발생한 원발성 골내암종

유동수,이영호,최순철,박인우,박태원 大韓口腔顎顔面放射線學會 1997 Imaging Science in Dentistry Vol.27 No.2

The primary intra-osseous carcinoma (PIOC) is a very rare lesion. PIOC is and odontogenic carcinoma defined as a squamous cell carcinoma arisinig within a jaw having no initial connection with the oral mucosa, and presumably developing from residues of the odontogenic epithelium. The authors diagnosed a 51-year-old female as primary intra-osseous carcinoma after undergoing clinical, radiological and histological examinations. The characteristics were as followed: 1. The patient complained of gingival bleeding on the premolar area in the left maxilla 2. The conventional radiograms showed a relatively well-defined unilocular radiolucent lesion from the mesial aspect of the upper left canine to the mesial aspect of the upper. left 1st molar. The 2nd premolar was separated from the 1st molar and the floor of the maxillary sinus was elevated by the lesion. There was a external root resorption of the upper left canine, the 1st premolar, and the 2nd premolar. 3. On the computed tomograms, the osteolytic bony lesion expanded the cortical plate of the left maxilla and displaced the margin of the left maxillary sinus upwards. But the bony lesion was separated from the maxillary sinus by a bony septum. 4. Bone scintigram with ?Tc demonstrated the increased uptake in the left maxilla. Sonograms in the neck area and chest P-A radiogram didn't show any abnormalities. 5. Histologically, the tumor islands infiltrating into the surrounding bone increased in alveolar pattern, composed of the malignant cells, and there was a necrosis in the center of the tumor islands.

노인 인구에서 신경인지기능저하와 혈청 지질농도와의 상관성

유영선,최석주,정성수,김지은,윤성욱,전동욱,백준형,박성우,이정구,추일한,김영훈 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.6

Objectives : In this study, the authors evaluated the correlation between eurocognitive impairments and serum lipids levels among Korean elderly over the age of 65. Methods : A total of 609 elderly individuals participated in this study. Screening for cognitive impairments were carried out using the Mini-Mental Status Examination-Korean version (MMSE-KC). There were 197 subjects above 1.5SD Of MMSE- KC and they were evaluated using the Korean versions of the Consortium to Establish a Registry for Alzheimer's Disease (AD) (CERAD-KC) and Geriatric Depression Scale (GDS-K). Results : There was a correlation between old age/low levels of education and AD (p<0.05, P<0.01). There was an inverse correlation between the serum level of total cholesterol and the word list recognition test scores. The serum levels of LDL cholesterol were inversely correlated with the scores on the constructional praxis test, word list recall test and word list recognition test. Inverse correlations between the serum level of triglyceride and scores on the word list recall test and word list recognition test were also observed. Conclusion : There were inverse correlations between the serum levels of lipids and language/memory function in subjects with AD.

초ㆍ중ㆍ고등학교 지구과학 실험의 연계성 분석 : 지질 분야를 중심으로

유영근,우영균,김희수 공주대학교 사범대학 과학교육연구소 1993 과학교육연구 Vol.24 No.1

The results of the sequentiality analysis in the geologic exeperiments of elementary Natural Science, middle school Science 2, high school Science Ⅰ(2) and Earth Science by the 5th curriculum are summarized as follows; 1) At attention item in textbook written by 5th curriculum there are presented that exeperiments must be over 15%. In the case of elementary school and middle school textbook, it is well considered, but the most high school textbooks are under of standard level. Therefore, it must be detailed the consideration due to unbalance between science textbooks in the contents and number of exeperiment. 2) As a uesult of inquiry skill elements analysis to examine science process skill level of geologic experiments of each school science textbook, it is some difference in accordance with the characteristics of experimental contents and included more inquiry skill elements with increasing to "Natural Science "→ "Science 2"→ "Science Ⅰ(2)"→"Earth Science" as 6.2, 7.2, 8.4, 8.8 of 10 inquiry elements respectively. 3) The sequentiality in "Natural Science" is well considered, but it is not in "Science 2","Science Ⅰ(2)" and "Earth Science" 4) At the next curriculum, we suggest to be indicated the lists of the essential experiments considered cognitive level and sequentiality of earth science experiment.

다공질규소와 전착 CdTe 박막의 접합 특성

김영유,이춘우 公州大學校 基礎科學硏究所 1998 自然科學硏究 Vol.7 No.-

나노 구조를 갖는 다공질규소의 표면과 투명하고 전도성을 갖는 접촉 방법을 얻기 위해 다공질 규소 표면에 CdTe 화합물 박막을 전착시키는 방법을 시도하였다. CdTe 화합물 박막은 lM의 CdSO4와 lmM의 TeO7가 혼합된 전해액 속에서 전착 전위-2.3 V(vs. Ag/AgCl)로 다공질규소의 표면에 전착시켰다. X선 회절 측정 결과 다공질규소 표면에 CdTe 화합물 박막이 생성되었음이 확인되었고, AES 분석 결과 표면에서 약 80 nm 깊이까지 Cd 및 Te 원소가 균일하게 존재하였다. 그리고 CdTe 화합물 박막이 전착된 다공질규소의 PL 특성은 발광의 세기는 약간 감소하였고 최대파장값은 고에너지 쪽으로 이동하였다. 이 결과로 보아 CdTe 전착 박막이 나노 구조를 갖는 다공질규소와 투명하고 전도성을 갖는 접촉물질로 이용될 수 있음이 밝혀졌다. The characteristics and effects of the electrodeposited CdTe thin film on the porous silicon. To find ways to achieve good mechanical contact on the nanostructure porous silicon layer, while keeping the interface transparent, we tried to electrodeposit a CdTe thin film on the porous silicon surface. The CdTe thin film was fabricated with -2.3 V vs. Ag/AgCl potential difference in the electrolyte solution containing 1 M of CdSO4 and 1 mM of TeO4. X-ray diffraction results confirmed the existence of CdTe compound film on the porous silicon surface. Auger depth profile showed that Cd and Te were uniformly distributed up to a 80 nm distance from the surface. The photoluminescence of the sample with a CdTe thin film was weaker in intensity than that without the film and the maximum wavelength was shifted to the higher energy. These results indicate that the contacting CdTe thin film was infiltrated to the nanostructure of the porous silicon.

Na^+이온이 다공질 실리콘의 Electroluminescence 특성에 미치는 영향

김영유,이춘우 公州大學校 基礎科學硏究所 1995 自然科學硏究 Vol.4 No.-

p형 단결정 규소 기판을 10%HF-ethanol 용액에서 양극처리하여 표면에 다공질 규소층 (porous Si layer)을 형성시키고, 0.2M Na2SO4용액에서 양극산화시켜 다공질 규소/전해질 계면에서 일어나는 EL을 관찰하였다. EL은 양극산화의 진행에 따라 강도가 점차 증가하여 포화되었다가 사라졌으며, 발광 도중에도 봉우리 파장은 단파장 쪽으로 이동하였다. 이러한 현상은 다공질층의 표면에 존재하는 Si-H결합의 규소밀도와 양자 크기 효과의 증대로 설명할 수 있었다. 그리고 EL의 봉우리 파장은 다공질 규소층의 형성 시간이 길수록 장파장 쪽으로 이동하였으며, 이것은 접촉 전해질에 들어 있는 Na+이온의 영향으로 해석되었다. Porous Si layers(PLS) were formed on the degenerated p-type(100) Si wafers by electrochemical anodization in 10% HF-ethanol solution. Electroluminescence(EL) from PLS/electrolyte interface by anodic oxidation in 0.2M Na2SO4 solution was investigated. EL increased, saturated, and finally diminished as anodic oxidation proceeded. The longer preparation time, the lower emitted photon energy, the shorter duration of EL, and the bigger total integrated intensity. Red shift of peak wavelength of EL was interpreted as a influence of Na+ ions in electrolyte solution. The proportionality of intensity and duration of EL, and blue shift of the peak wavelength during oxidation were discussed in terms of Si-H bonds on PSL and ehancement of quantum size effect.

작업구역의 합리적 분할에 의한 택트공정관리 개선

정영권,윤유상,서상욱,신동우,김창덕,김경래 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The purpose of this study is to increase the operational efficiency of Tact Planning and Scheduling through effective labor control based on fairly reasonable creation of work area. The main result of the study are as follows: 1) Specific section of work area for electric work lead to no division of zone between internal residence area and bathroom. And designate the work area of each floor so that it would manage labor control effectively. 2) When it comes to equipment work. It set up work area according to "floor" taking account into more frequent unit work comparatively than floor work. The study recommends that. As a future research, eventually aims at establishment of integrated system of labor control Tact Planning and Scheduling by combining respectively divided system into one.

쪽거리 차원을 통한 다공질규소의 미세구조 분석

김영유,홍사용,이춘우,류지욱,이기환,최봉수 대전산업대학교 반도체기술연구소 1999 半導體技術硏究所報 Vol.1 No.-

p형 단결정 규소 웨이퍼를 불화수소 용액속에서 전류밀도와 양극반응 시간을 변화시켜 다공질규소를 제작하고, 그 질량을 측정한 후 이 값으로부터 다공도와 쪽거리(fractal)차원을 계산하였다. 그 결과 양극반응 시간이 일정한 경우 다공도는 전류밀도에 비례하였다. 그리고 전류밀도가 일정한 경우 여러 양극반응 시간의 데이터로부터 얻은 쪽거리 차원은 일정하였다. 또한 쪽거리 차원은 불화수소의 농도 증가에 따라 감소하였다. 이같은 실험 결과를 퍼짐한계침전(diffusion limited deposition) 모형으로 계산된 2차원 컴퓨터 시늉내기(simulation) 결과와 비교 분석하였다. 시늉내기 결과 다공도는 퍼짐거리에 비례하였으며, 쪽거리 차원은 퍼짐거리와 반비례하였다. 이때 퍼짐거리는 전류밀도에 비례하고 불화수소의 농도에 반비례하는 물리량이므로 정성적으로 실험 결과와 일치하였다. 그러나 쪽거리 차원이 증가함에 따라 다공도가 감소되는 결과는 실험결과와 상반되었다. Porous silicon layers were fabricated with various conditions of HF concentration and current density. And their masses were measured. From these data, the porosity and fractal dimension were estimated and analyzed. We found that the porosity was proportional to the current density when the anodic reaction time was fixed and the constant values of fractal dimension could be estimated from a series of data with fixed HF concentration. The values of fractal dimension were decreased with increasing HF concentration. The obtained porosity and fractal dimension were compared with the 2-dimensional computer simulation based on diffusion limited deposition model. According to the simulation, the porosity was proportional to the diffusion length and the fractal dimension was inversely proportional to the diffusion length. Since, the diffusion length is proportional to current density and inversely proportional to base concentration, our experimental data qualitatively agreed with the results from the simulation. The porosity obtained by experiments, however, was not consistent with the results by simulation.

다공질규소 microcavity의 페브리-페로 필터 특성

이춘우,박대규,홍사용,김영유,전종현 公州大學校 基礎科學硏究所 1999 自然科學硏究 Vol.8 No.-

p형 단결정규소 웨이퍼를 15% HF-에탄올 용액에서 양극 산화시켜 다공질규소를 얻는 과정에서 전류밀도에 따라 굴절률이 변하는 다층의 다공질규소층(porous silicon multilayer)을 구현하였다. 그리고 다층의 다공질규소층(I), 다공질규소 발광층, 또 다른 다층의 다공질규소층(II)의 순으로 구성된 porous silicon microcavity(PSM)를 제작하고 그 물성을 조사하였다. PSM 상하에 위치한 다층의 다공질규소층의 단면을 AFM(Atomic Force Microscope)으로 조사한 결과 고굴절률과 저굴절률이 주기적으로 교차하는 층이 균일하게 형성되었으며, 중앙의 다공질규소 발광층도 균일하게 나타났다. 다층의 다공질규소층 및 다공질규소 발광층의 두께를 각각 실효파장의 1/4배 및 2배가 되도록 하였을 때 특정파장의 필터로 쓰일 수 있는 페브리-페로 간섭 필터(Fabry-Perot interference filter)의 특성이 나타났다. 또한 PSM의 발광 스펙트럼은 그 반치폭이 현저히 감소하고 발광의 세기가 크게 증가되는 경향을 보였다. 또한 발광파장을 600 nm로 조절하여 PSM을 구현하고 발광 특성을 관찰한 결과 600 nm 부근에서도 같은 현상이 일어나 발광의 최대 봉우리 파장값을 이동시킬 수 있는 필터로서의 역할이 가능함을 보였다. In the process of obtaining porous silicon by anodizing p-type doped crystalline silicon wafer in 15 % HF-ethanol solution, we obtained porous silicon multilayers which had periodically varying refractive index by the current density. We fabricated the porous silicon microcavity(PSM) which consist of porous silicon multilayers(I), active layer of porous silicon and porous silicon multilayers(II) and investigated its physical properties. The AFM(Atomic Force Microscope) measurement from the cross section of multilayers I and II) shows uniformity of high refractive index and low index layers as well as the active layer. We observed the characteristics of Fabry-Perot interference filter when the thickness of layers was 1/4 and the thickness of active layer was twice of the effective wavelength, which can be used as a filter for specific wavelength. We found the emission characteristic from the PSM, which FWHM(Full Width Half Maximum) was considerably decreased and emission intensity was increased. And as a result of fabricating PSM which consisted of 600 nm in the light emission wavelength and observing the light emission properties, We found out that there was the same phenomenon in 600 nm wavelength and PSM could act as a filter which could shift the maximum of the emitted light.

Fractal을 이용한 多孔質 硅素의 微細孔 形成 課程에 관한 硏究

김영유,최동희,류지욱,홍사용,이춘우 公州大學校 基礎科學硏究所 1997 自然科學硏究 Vol.6 No.-

단결정 실리콘(P형)을 양극 산화반응으로 다공질 규소를 제작하고 AFM과 이차원 DLA 모델을 사용한 컴퓨터 모의 실험으로 표면구조를 조사했다. 컴퓨터 모의 실험에는 양공의 확산거리 D를 변수로 사용했다. AFM 측정 자료와 컴퓨터 모의 실험을 비교해본 곁과 전하 밀도 lmA/cm2에 해당하는 확산거리는 약 100nm였으며 그 때 프랙털 차원은 1.85였다. 또한 반응전류 10 mA/cm2에 해당하는 확산거리는 약 150nm의 결과가 얻어졌으며 그 때의 프랙탈 차원은 1.75이다. 이러한 컴퓨터 모의 실험 결과와 AFM을 통하여 관찰한 p-PS의 표면 구조를 비교해보면 양극 반응 전류와 양공의 확산 길이는 비례 관계가 있다. Surface structures of porous silicon are investigated by AFM and a qualitative theoretical model based on 2 dimensional DLA model is used to explain their fractal structures. The diffusion length L is used as a starting parameter, which sets the distance of a hole which can reach to a tip of a pore. The best result is obtained when the diffusion length was 100 nm (200 lattice distance). In this condition, the average pore distance is about 650nm, which corresponds to lmA/cm2 current density in the experiments and its fractal dimension is 1.85. Our results verify that a diffusion length L is proportional to the current density used in an experiment.

유착성 관절낭염 치료에 있어서 한방 치료와 양방 치료의 임상적 고찰 : 동서협진 모델 개발을 위한 기초 연구를 중심으로

남동우,정인태,김주희,박유선,임사비나,이두익,이재동,이윤호,최도영 경희대학교 동서의학연구소 2006 東西醫學硏究所 論文集 Vol.2006 No.-

Objectives : To observe the effect of acupuncture treatment and western medical treatment on frozen shoulder patients. Methods : 39 voluntary patients were randomly assigned to the Eastern treatment group(E group, n=22) and the Western treatment group(W group, n=17). The E group received acupuncture treatment on LI15, TE14, GB21 and Master Dong's acupuncture points, Shin-gwan and Gyun-joong, twice a week for 4 weeks. The W group received suprascapular nerve block, subacromial injection and trigger point injection, twice a week for 4 weeks. Both groups were instructed to practice self exercise during their daily lives. Evaluations were made before treatment and after treatment using Constant Shoulder Assessment(CSA), Shoulder Pain and Disability Index(SPADI) and the patient's satisfaction concerning the treatment was measured by Visual Analogue Scale(VAS). The obtained data were analyzed and compared. Results : The E group showed significant improvement(p<0.05) according to the CSA and SPADI. The patient's satisfaction scored 5.67 on a scale of 10. The W group showed significant improvement(p<0.05) according to the CSA and SPADI. The patient's satisfaction scored 7.73. But the difference between the two groups were insignificant according to CSA and SPADI. Conclusion : Both acupuncture and nerve block treatment significantly improved frozen shoulder. But the difference of the two treatments was insignificant.