구강검진에서 임상검사와 비교한 파노라마방사선사진의 유용성

안서영,안창현,최갑식 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2

Purpose : To evaluate the efficacy of panoramic radiography by comparing the results of clinical examination with radiographic findings. Materials and Methods : We studied 190 patients (20 men and 170 women; mean age, 40 years; range, 22 to 68 years) who visited the health promotion center of Korea Medical Science Institute and were examined both clinically and by panoramic radiography. We compared results from both examinations. Treatment options by clinical examination were described as “no treatment indicated”, “treatment of dental caries”, “removal of calculus”, “treatment of periodontal disease”, “prothodontic treatment” and “extraction of the third molar”. Findings taken from the panoramic radiography were: dental caries, periapical lesion, alveolar bone loss, calculus deposition, retained root, impaction of the third molar, disease of maxillary sinus, bony change of mandibular condyle, etc. Results : The prevalence of panoramic findings were: 37.9% of dental caries, 17.4% of periapical lesions, 44.7% of alveolar bone losses, 62.6% of calculi deposition, 7.9% of retained roots, 26.8% of third molar impactions, 6.3% of diseases of maxillary sinus, 2.1% of bony changes of mandibular condlye and 35.8% of miscellaneous lesions. Abnormal conditions revealed by panoramic radiography which had not been discovered on clinical examination were: 24.2% of the patients had dental caries, 17.4% had periapical lesions, 7.4% had calculi deposition, 5.3% had retained roots, 15.3% had third molar impactions. The opposite cases were: 5.2% had dental caries, 12.6% had calculi deposition, and 9.5% had third molar impactions. Conclusion : The use of panoramic radiography as a supplement to the clinical examination might be a valuable screening technique.

개인 이동체의 탑승자 질량 변화에 강인한 선형 매개변수 가변 제어기법

안대용(Dae-Young An),강창묵(Chang Mook Kang) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

Linear parameter varying(LPV) system can be effectively applied to control in an environment where parameters change. And linear quadratic regulator(LQR) controller is optimal controller in state-space model. In this paper, we propose a LPV controller for velocity control of personal mobility such as an electric wheelchair, which can be varying a wheelchair mass. We are modelling a wheelchair system using dynamics and kinematics and get an interpolation parameter vector by weighing a wheelchair mass. It can be optimized control strategy for the user`s weight using the LPV control system. To prove the effectiveness of the proposed method, a single LQR controller and LPV controller were compared and analyzed using MATLAB/Simulink. The proposed method has better control performance compared to a single LQR controller.

혈중납이 흰쥐의 Microsomal Cytochrome P-450 Monooxygenase 활성도에 미치는 영향

박기현,장성근,윤영안,김기웅,박종안 순천향대학교 1993 논문집 Vol.16 No.3

In rats treated with lead nitrate and/or red ginseng extract mixture we observed a change in the level of hepatic cytochrome P-450 and electron transport system for P-450 dependent reaction, and content of Zincprotoporphyrin(ZPP) and Hemoglobin(Hb) in whole blood. The content of cytochrome P-450 and ?? , and the activity of ECHEase, AHHase and NADPH-cytochrome C(p-450) reductase were slowly decreased according to the dosage of lead nitrate. On the other hand, the activity of ?? reductase was increased according to the dosage of lead nitrate, but in case of treatment with red ginseng mixture, this enzyme activity was slightly decreased. In whole blood, the content of hemoglobin and ZPP were not shown any critival change but lead content increased according to dosage of lead nitrate. These results suggest that content and activity of cytochrome P-450-dependent monoxygenase may be dependent on specificity of substrates, and the acute exposure of lead nitrate and red ginseng extract mixture was not affected any biological significance.

췌장가성낭종에 대한 임상적 고찰

서종권,장정환,김성환,김정용,민영돈,김권천,김종안 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1

For the purpose of finding the changing patterns of the status and management of the patient with pancreatic pseudocyst who were treated in same hospital according to the time sequence, the authors reviewed 29 patients' charts with pancreatic pseudocyst treated at department of Surgery, Chosun University Hospital during 11 years from Jan. 1984 to Dec. 1994 comparing with those of the previous 24 patients treated from Jan. 1974 to Dec. 1983 that was reported at the Journal of Korea Surgical Society, 1985. The following results were obtained: 1. The age and sex distribution were not changed. The male and female ratio was 2.2~2.4:1 and the most prevalent age group was fourth decade and fifth decade. 2. The pancreatitis was the main etiologic disease and it was more frequent than previous report. That can be probably attributed to the increasing of alcohol intake. 3. The pancreatic body was the most affective site. 4. The common symptoms and signs were abdominal pain and tenderness(93.1%), upper abdominal palpable mass(48.3%), and anorexia, nausea and vomiting(44.8%). That was not changed with previous report. 5. The duration of symptoms to diagnosis were usually 3~4 weeks and 5~6 weeks. 6. The most common laboratory finding was amy1asemia(72.4%). 7. The preoperative complications were pleural effusion (48.3%), infected cyst(17.2%) and rupture of cyst(10.3%). 8. We could obtain good outcomes in the 7 patients(25.9%) treated conservatively. The surgical treatment, external drainage, internal drainage and excision, were done in 21 patients according to the patients status. 9. There were total 11 cases(52.4%) postoperative complications in all operation patients. That rate was increased than before. However it does not mean true increase because of poor preoperative condition of the patients. 10. The time interval between diagnosis and operation was 1~3weeks(47.6%) and 3~6weeks(28.6%). The proper operation time should be taken case-byUcase. In conclusion, the last decade has witnessed no additional changes in diagnosing and curing pancreatic pseudocyst other than the following two. The disease is increasingly cause by pancreatitis, Particularly alcoholic pancreatitis and it can be more effectively dealt with by the conservative treatment. Nevertheless much remains to be discussed on the adequate time and therapy in curing pancreatic pseudocyst. What matters here is to develops more specified methods for each patient taking into consideration on the nature of disease.

異功散의 免疫增强效果에 관한 實驗的 硏究

안규석,이경태,장성구,정지창,노영수 世明대학교 한의학연구소 1999 韓醫學硏究所 論文集 Vol.2 No.-

This experimental study was carried out to evaluate the immunomodulatory effects of Ekong-san. To evaluate the immunomodulatory effects of Ekong-san, delayed type hypersensitivity, hemagglutinin and hemolysin titers for hymoral immune response, rosette forming cells for cell-mediated immune response, natural killer cell activity, proliferation of lymphocyte, productivity of Interleukin-2, and carbon clearance were measured with methotrexate treated mice. The results were summarized as follows; 1.The influence of the treatment on hemagglutinin and hemolysin titers, rosette forming cells, the proliferation of lymphocyte, and productivity of Interleukin-2 was dose-dependent and the results showed a significant difference when compared to control group. This implies that the humoral immune response was activated. 2.The natural killer cell activity was significantly increased in both sample groups as compared to the control group when the effector cell:target cell ratios were 100:1 and 0:1. However when the ratio was 10:1, there was no significant difference with the control group. 3.Carbon clearance, the proliferration effect of phagocytes was significantly increased sample group as compared to the control group. According to the results, Ekong-san has the immuno-activity. We could suggest that Ekong-san is able to be applied to the anti-cancer treatment and prevention.

형제에서 발견된 단순골낭

안서영,안창현,최갑식 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.3

17-year-old and 14-year-old brothers were referred for evaluation of the cystic lesions on the mandibular anterior area with no symptoms. Neither their mother nor the brothers could recall any past trauma to those areas. Panoramic and intraoral radiographs revealed moderately defined cystic lesions on their mandibular anterior areas. Biopsies on both lesions revealed simple bone cysts. Hereditary cause or familial history of simple bone cysts could not be found in literature review. This case may have been a coincidence. However, further investigation is needed to find the cause of simple bone cysts occurring in patients those are closely related.

투명 태양전지를 적용한 모듈화된 경사형 이중외피시스템의 건물부하 저감성능과 건축물 적용가능성 예측 연구

안형준,김영탁,최창호,이현우 대한건축학회 2005 대한건축학회논문집 Vol.21 No.2

Various technologies such as PV, Solar collector and Double-skin have been developed and applied to improve efficiency. Although either BIPV or double skin applied to the surface of the building, power and thermal load cannot both be increased. In the case of BIPV, because it is applied to the facade, incident solar energy decreases and efficiency drops off. The system in this paper complements these disadvantages and aims to decrease the heating & cooling load by transforming solar energy to electronic and thermal energy. The research in this paper is about the applicability of the clear PV attached double-skin system. And the PV electronic generation and the factors that affect the heating & cooling load such as the daily radiation, sun shading ratio, CFD, heating & cooling load and daylight luminance distributions in the building are simulated.

Cu(Mg) 박막의 Time Dependent Dielectric Breakdown 특성 평가

안정욱,황상수,박영배,주영창 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.2

Electrical properties and time dependent dielectric breakdown (TDDB) characteristics of Cu (0.7 at.% Mg) alloy films are investigated to improve the reliability of Cu interconnects used in microelectronic devices. After Cu(Mg) films are annealed in vacuum at 400℃ for 30 min, resistivity decreases from 3.4 to 2.0 μΩcm and, thin and continuous MgO layers form both on Cu(Mg) film surface and on Cu(Mg)/SiO₂ interface. Metal-Oxide-Silicon (MOS) capacitors composed of Cu(Mg) film deposited on thermal oxide grown on Si wafer are subjected to bias temperature stressing at 180 through 220℃ under electric fields of 1.5 through 2.6 MV/cm. Median time to failure (MTTF) and activation energy of Cu(Mg)/SiO₂ are much larger than those of pure Cu/SiO₂. Cu drifts into dielectric are inhibited by the continuous Mg oxide formed at Cu(Mg)/SiO₂ interface which improve interfacial adhesion and finally lead to better interconnect reliabilities. (Received October 29, 2004)

Alloxan 유도 당뇨병상태에서 과산화지질생성에 미치는 Brazilin의 효과

안영수,길이룡,소동수,창동신,김진형,박광식,문창규 한국환경독성학회 1996 환경독성보건학회지 Vol.11 No.2

Brazilin was tested for its ability to inhibit alloxan induced lipidperoxidation. Lipid peroxide contents in liver, kidney and serum were measured by the TBA method. ICR mice receiving alloxan at a dose of 43mg/kg via the tail vein after a 24hrs starvation showed significantly increased lipid peroxide contents as compared to untreated control. Lipid peroxide contents in liver, kidney and serum of alloxan-induced diabetic mice were dose-dependently decreased by the treatment of brazilin at a dose of 10mg/kg, 50mg/kg, 100 mg/kg for 5 days.

EMBLEM SYSTEM 아파트내 IEEE1394 VESA 기반 통합 통신배선 NETWORKING 기술 제안

정영철,오미숙,장민혁,이광재,박종안 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2

As telecommunication network users and information appliances increase, efficient home networking environment is needed for bulk A/V data transmission in real time. For this need, the integrated applicable Interfacing technologies using IEEE1394 and UTP cables are considered to be applied to the apartments architecture. In this paper, we firstly review the residential cabling environment of apartents according to the emblem system of MIC in a point of home networking software technologies development and information appliances increase in domestic IT situation, and finally propose a integrated home network infrastructure architecture for users' convenience on the basis of the implementation and experiment on the high speed interfacing environment in the emblem system apartment using the low cost interfacing media.