삼각형 모양에 의한 회절현상에 관한 연구

강성수,성덕용,육도진,홍성대,이원진 대구산업정보대학 2003 논문집 Vol.17 No.-

A review of diffraction phenomena for double slit and regularly triangular aperture has been done. First, as a width b and a space d of double slit vary, a diffraction pattern has been calculated by theory. Second, an intensity of diffraction light and separation between fringes for slit has been measured. And, we can expect that the calculated diffraction pattern for a regularly triangular aperture has three symmetric axes.

測定用 寫眞과 非測定用 寫眞의 組合에 依한 圓筒形 構造物의 全面解析

姜準默,裵淵晟,李鎭德 忠南大學校 産業技術硏究所 1991 산업기술연구논문집 Vol.6 No.2

본 연구는 C.R.P.에서 측정용과 비측정용 사진을 조합하여 원통형 구조물의 전면해석을 시도하고 그의 정확도를 실험적으로 구명한 것이다. 대상물 주위에 원형의 노출 network을 구성하고 측정용과 비측정용 카메라를 이용하여 multi-station photography를 실시하였다. strip과 block을 bundle조정에 의하여 촬영 거리별로 측정용 사진과 비측정용 사진으로 각각 해석하고, 정확도를 비교함으로써 비측정용 카메라의 적용가능성을 입증하였다. 또한 원통형 구조물의 全面을 단시간에 해석하기 위하여 측정용 사진과 비측정용 사진의 조합해석을 시도하고 이의 효용성을 제시하였다. The objective of this study is to suggest the ways of analyzing the entrire-area of cylindrical structure with combination of metric and non-metric photos in C.R.P. and also investigate characteristics of accuracies. For it, circular exposure network was disigned and multi-station photography was executed with metric and non-metric camera respectively. Bundle adjustment was performed to compute three dimensional coordinates of unknown points. By comparing accuracies of results analyzed with metric photos and non-metric photos, we proved applicability of non-metric camera to purpose of measurement. Also, by positioning through combining metric and non-metric pothos, we proved the effectiveness of it and found out characteristics of accuracy of it.

FSK의 周波數 檢波方式에 對한 信號處理의 改善에 關한 硏究

姜英鎭,高德永 圓光大學校 1985 論文集 Vol.19 No.2

This paper presents a technique for optimizing the baseband pulse shapes in digital 2 binary code frequency modulated signals. The acquisition performance due to frequency offsets and steady - state tracking performance in the presence of noise and signal. The effect of the nonlinearity in the loop filter is approximated using a quasilinearization approach. The overall improvement in performance of a phaselocked loop with a nonlinear filter is evaluated and compared with a conventional PLL.

관상동맥질환 환자에서 스텐트 시술 후 재협착에 관한 연구

강진환,권영주,박상호,한대희,이상철,김명구,변정득,최병조,심규혁,온영근,현민수,김성구 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background and aims : In the coronary artery disease, a rate of restenosis was much decreased by placement of coronary stent than when percutaneous transluminal coronary angioplasty has been applied, but there are still important clinical problems of restenosis. There has been many progressive studies about various factors contributed to this restenosis. So, we studied a relation between restenosis after placement of coronary stent in the coronary artery disease and many clinical factors, characteristics of stenotic lesion and procedural factors, and also assessed the restenosis rate of various coronary stents. Methods : Total 58 lesions(46 cases of patients ; man 30, woman 16) were evaluated, which has been performed a follow-up coronary angiography after 6 months (mean 188 days) since coronary stent had been placed. Various stents were implanted and assessed a relation between restenosis and many factors. Results : Of 58 lesions were target stenotic studies, there were 22 of restenotic lesions(37.9%), and the restenosis rate wes statistically significant difference in the relation with diabetes mellitus(p<0.05), group of acute myocardial infarction(p<0.05) among clinical diagnosis of ischemic heart disease(stable angina, unstable angina and acute myocardial infarction) in clinical factors and with high dilation pressure of stent(p<0.05) in procedural factors. When the rate of restenosis was evaluated among implanted stents, it was lowest in the Multilink^(®) stent and highest in the Nir Royal^(®) stent(60%). Conclusion : In this study of restenosis and various factors after placement of stents in the coronary artety disease, factors such as diabetes mellitus, group of acute myocardial infarction and a dilation pressure of stent were significant related with restenosis and the restenosis rate of Multilink^(®) stent was lowest and the highest restenosis rate was of Nir Royal^(®) stent.

판막 질환에서의 심근 섬유화 : 심근 조직을 이용한 형태학적 연구 및 혈청 생화학적 지표의 분석

강수진,박덕우,송재관,박경민,송종민,강덕현,한기훈,송현,이재원,주석중,송명근,김정선 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

이미지 검색을 위한 관심영역의 요소추출과 데이터 변환 연구

강문주,양동일,김덕은,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

In this paper we designed the content-based image system. It discovers the characteristic value of color area for the existing image, when any user establishes the special interesting region for the question images. And we designed the system to be able to search the similar image of the interesting region, compared with the table that saved the characteristic value of moment which is unchangeable for the size and the rotation of form. In this paper, we suggest the image search model based on neural network. This is able to seek for the aimed image through the feedback to search the nonlinear relations by the method of searching content-based image using SOM neural network. We make use of the Precision and the Recall that are used for the system evaluation using the similar matching method in general. As a result of the evaluation of the content-based image system, we can reduce the time and memory to find out the feature value of the image that is meaningless in the general images.

이미지 검색을 위한 관심영역의 오소추출과 데이터 변환 연구

강문주,양동일,김덕은,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

In this paper we designed the content-based image system. It discovers the characteristic value of color area for the existing image, when any user establishes the special interesting region for the question images. And we designed the system to be able to search the similar image of the interesting region, compared with the table that saved the characteristic value of moment which is unchangeable for the size and the rotation of from. In this paper, we suggest th image search model based on neural network. This is able to seek for the aimed image through the feedback to search the nonlinear relations by th method of searching content-based image using SOM neural network. We make use of the Precision and the recall that are used for the system evaluation using the similar matching method in general. As a result of the evaluation of the content-based image system, we can reduce the time and memory to find out the feature value of the image that is meaningless in the general images.

일 대학병원에서 양극성장에 환자의 흡연 특성 : 정신분열병 환자와의 비교 연구

이강수,천덕희,김지혜,김현진,조현상 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.4

Objectives : This study aimed to investigate smoking characteristics and nicotine dependence severity in bipolar disorder Comparing those of schizophrenia. Methods : 70 bipolar and 123 schizophrenic patients, diagnosed using DSM-IV-TR criteria and treated at the Severance Mental Health Hospital, were interviewed regarding socio-demographic variables, smoking characteristics and Fagerstrom Test for Nicotine Dependence (FTND), designed to evaluate the intensity of smoking. Results : The rate of current smoking was 60.0% in the bipolar group, and 50.4% in the schizophrenia group. No significant difference was seen in terms of the rate of current smoking between the groups. Rates of having ever smoked also did not differ between bipolar (73%) and schizophrenic patients (65%). Daily cigarette consumption of bipolar patients (15.9 cigarettes/day) was significantly lower than that of schizophrenic patients (21.2 cigarettes/day), but FTND score didn't appear to differ between bipolar and schizophrenic patients. Bipolar females showed higher rate of current smoking (44%) than schizophrenic females (17%). Among bipolar patients, antipsychotics dose was not correlated with daily cigarette consumption and FTND total score. Age of disease onset didn't appear to differ between smokers and non-smokers in bipolar group. Conclusion : Although daily consumption was significantly lower in the bipolar group, the rate of smoking and smoking severity in bipolar disorder were as high as in schizophrenia. This fact suggests that the bipolar disorder might be related to the nicotinic acetylcholine system dysfunction as like schizophrenia.

산모혈과 제대혈에서 연농도에 관한 조사

이덕희,문종국,배강우,이용환,김진하,박강원 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.3

This study was conducted to evaluate the blood lead levels in 141 pregnant women who were not occupationally exposed to lead and their umbilical cord, and to identify some differences in blood lead levels by living area. The subjects were all delivered at St. Benedict Hospital in Pusan and the blood lead levels were measured by graphite furance atomic absorption spectrophotometer. The summarized results were as follows. 1. The geometric mean lead levels in maternal and cord blood were 8.0±1.8μg/dl, 5.0±0.6μg/dl respectively. 2. Lead levels in maternal(8.7±1.7μg/dl) and cord blood(5.4μ±0.7μg/dl) of industrial area(n=24) were higher than residential area(n=124) which were 7.9±1.7μg/dl and 5.0±0.6μg/dl respectively(p<0.05). 3. Maternal blood lead concentration was significantly correlated to cord blood lead concentration(r=0.6090, p<0.001), but other variables(maternal age, paternal smoking, birth weight, etc) were not correlated.

적외선 센서를 이용한 다종가스 계측기 구현

최낙진,류정호,강봉휘,이광우,이덕동 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1

The semiconductor gas sensors with a tin oxide as the raw material have been generally used to detect gases in the principle of electrical conductivity variation. However, it was difficult to design the gas detection system due to the non-selectivity, the non-stability and the influence of temperature, humidity etc. Therefore, it was proposed NDIR(non-dispersive infrared) method using pyroelectric infrared sensor to overcome the disadvantage of the semiconductor gas sensors. This method has been recently used to detect various gases in industrial parts. It has the advantages of selectivity, stability and responsibility. The gases used in this paper were CO_(2)(carbon dioxide) and HC(hydrocarbon) series. The system was designed with the Intel MCU i8097BH microprocessor. Main topics were to remove interference effect for other gases and to minimize influence for ambient circumstance by using the software and the hardware techniques.