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      • 카올린에서 추출한 Silica로부터 탄소 환원질화에 의한 질화규소의 합성

        신현택,형유업,박찬욱,배원태 慶尙大學校生産技術硏究所 1987 生産技術硏究所論文集 Vol.3 No.-

        Nitriding behavior of the mixtures of amorphous silica extractracted from San Chung White kaolin and activated carbon Were studied by varying the carbon content, reaction temperature, and time under N₂atmosphere. Experimental results obtained from XRD, SEM and TEM indicated that the nitridation of the mixtures initiated below 1200℃ and mullite, silicon oxynitride, β-Sialon, β-SiC, and α-and β-Si₃N₄were identified as reaction products. Optimum nitridation condition of extracted silica were as follows. 1. Carbon/Extracted silica (in weight ratio)=3. 2. Reaction temperature; 1350℃ 3. Reaction time ; above 1hour.

      • 정향 수침액에 의한 아나필락시의 억제 효과

        신태용,김상현,이석봉,엄동옥,임종필,이은희,김형민 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

        The current study evaluates the capacity of Caryophylli Flos water extract(CFWE) to regulate immediate allergic reaction by control of histamine release. CFWE was found to exhibit a ingibitory activity on the compound 48/80-induced anaphylaxis. CFWE inhibited the serum histamine release induced in anaphylaxis by compound 48/80. CFWE was also showed a dose-depent activity on the conpound 40/80-induced histamine release from the highly purified population of Alcian Blue-positive peritoneal mast cells. This result suggest that CFWE may be useful for the prevention and treatment of allergy related disease.

      • 칼라영상 입 ·출력 시스템의 칼라보정 알고리듬에 관한 고찰

        신현덕,김일태,임재권,윤동한 國立金烏工科大學校附設生産技術硏究所 1995 産業技術開發硏究 Vol.11 No.-

        Colors reprodued by color image processing system are affected by various physical factors and environmental conditions. Therefore it is difficult to reproduce the original object color accurately. Thus color calibrations of the input and output data of color image processing system based on spectral distributions are required. We propose a color calibration algorithm by considering spectral characteristic of the chosen color reproduction system which can be applied to device independent color reproduction using characteristic vectors of surface reflectance. The method comprised of two steps. The first step is color analysis step which reproduces the original object color from the camera output using color characteristic vectors. The second step is color synthesis step which displays the original color accurately on the monitor by considering the monitor's phosphor spectra. The spectral responsivities of camera sensors and phosphor spectral characteristics of a given monitor are evaluated. Also, to evaluate color reproducing characteristic we applied the proposed color calibration algorithm by choosing Macbeth ColorChecker's twenty four color spectra as a test color set. As a result, we reconstruct the actual color very closely on monitor using the proposed color calibration algorithm.

      • 급성 심근경색 초기에 도플러 심초음파를 이용한 좌심실 이완기 기능의 평가

        신원용,김주성,김철현,이광희,최태명,현민수,김성구,권영주 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

        Background : Congestive heart failure after acute myocardial infarction relate to left ventricular systolic sysfunction. Also, left ventricular diastolic function contribute to heart failure. The aims of this study were, firstly to characterize left ventricular diastolic function by transmitral flow velocity, and secondly to study the significance of Doppler measurements in relation to the development of heart failure in the early phase of myocardial infarction. Method : Pulsed Doppler echocardiography of transmitral flow was assessed in 34 patients with acute myocardial infarction. According to the Doppler transmitral flwo velocity profile, the study patients were assigned to the three groups: normal filling pattern (DT > 140ms, IVRT < 100ms), relaxation abnormality (DT > 140ms, IVRT ≥ 100ms), pseudonormal or restrictive pattern (DT ≤ 140ms). Also, on the basis of the presence of heart failure during first week of hospitalization, the patients were divided into two groups: patients with no sign of heart failure (Killip class Ⅰ) and heart failure (Killip class Ⅱ-Ⅳ). Results : Of the 34 patients studied, 10(29%) were normal filling pattern, 17(50%) abnormal relaxation and 7(21%) were restrictive patterns. The left ventricular ejection fraction(EF, 40 ±6%) of restrictive pattern was significantly lower than that of normal filling pattern of abnormal relaxation(p < 0.01). And, the IVRT, DT, E/A and left ventricular EF were reduced in patients with heart failure(14 patients) compared to no sign of heart failure(20 patients)(p<0.05). Of the patients with heart failure, IVRT and left ventricular EF were reduced in patients with DT≤140 ms compared to DT> 140ms(p=0.001). Conclusion : Left ventricular diastolic dysfunction is present early after onset of symptoms of acute myocardial infarction. Assessment of left ventricular diastolic function complements measurements of systolic function in the evaluation of cardiac function. DT, IVRT, E/A and left ventricular EF are useful predictors for development of congestive heart failure following acute myocardial infarction.

      • 간외담관 폐쇄에서의 초음파소견 : 담관벽 경계소실의 중요성 Significance of Decreased Echotexture of Bile Duct Wall-Interface

        신현준,손은주,이창희,최영칠,전혜정,박정희,이태의 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

        Ultrasound is very useful in evaluation of obstructive jaundice. We retrospectively evaluated the useful findings of ultrasonography in differentiating benign extrahepatic duct obstruction from malignant diseases. Among the 36 patients, 25 patients were benign extrahepatic obstruction and 11 patients were malignant obstruction. The shapes of extrahepatic dilatation were classified into fustiform, meniscus, and abrupt cut off by bowel gas. The diameter, length, and bile duct wall-interface were compared between benign and malignant groups and serum bilirubin and alkaline phosphatase were also compared between two groups retrospectively. The results were as follows. The most common form of extrahepatic dilatation was meniscus(10 of 26 patients, 38%) in benign obstruction, and fusiform(8 of 11 patients, 73%) in malignant obstruction. No significant difference was noted in diameter, length, serum bilirubin, and alkaline phosphatase between benign and malignant groups. Only one case showed decreased bile duct wall-interface in benign obstruction, but loss or decrease of bile duct wall-interface were 8 patients in malignant obstruction. The combined findings of fusiform dilatation and loss of bile duct wall-interface in ultrasonography will be helpful in differential diagnosis of malignant extrahepatic bile obstruction from benign conditions.

      • KCI등재후보

        학습장애인의 은유능력

        한태현,신현기 한국특수교육문제연구소 2003 특수교육저널 : 이론과 실천 Vol.4 No.1

        일반적으로 은유는 수사학에서 사용되고 있는 언어의 한 표현방식 정도로 인식되어져오다가,1960년대,Black 이 은유에 대해 새로운 철학적 이론으로서의 견해를 제시함으로써 비로소 철학적 입장으로서의 언어 즉,언어철학의 한 중요한 이슈가 되어지고 있다. 은유에 대한 그러한 연구들은 지시적,기호적으로 언어를 이해하는 것으로부터,확장 성장적, 실존적으로서 언어를 이해하는 것이 가능하도록 하였다. Ricocur의 주장에서 보는 바와 같이 은유는 자기 창조적 언어이자,상상적 그리고,역동적 언어이다. 이러한 기능을 가진 은유는 인간으로 하여금 실존으로 나가게 하는 언어로서의 기능을 하게될 수 있다. 또한,이 은유는 초인지적 도구로서 언어와 사고를 연결해 주는 역할을 하게 한다. 이를 연구자는 암묵적 지식으로 보았다. 인간은 자가가 표현할 수 있는 것보다 더 많은 것을 알고 있다는 폴라니의 말파 같이,은유는 현상적,표면적,과학적으로 측정할 수 있는 영역 그 이상의 언어이다. 앞으로 언어장애연구에 있어서,지금까지 해왔던 것처럼,표현된 언어이기는 하지만 알아듣기 어렵고,일반적 언어규칙을 따르지 않는 것에 대한 원인과 그것에 근거한 치료 방법을 모색하는 것도 중요하지만,나아가 드러나지 않는 아동의 언어와 사고에 대해서도 관심을 두고 연구한 필요가 있다. 특히 은유에 대한 연구는 이러한 암묵적 지식 연구의 대표적인 방법으로서,언어학적 측면은 물폰 철학적,심리학적 측면에서 중요한 기능을 할 것으로 판단된다. 마지막으로,이러한 은유적 능럭을 학습장애인도 소유하고 있을 것이라는 주장을 하면서,그들에 대한 고전적인 전통적인 지능에 입각한 시각을 비판하고자 하였다. This short essay attempts to approach metaphor as a multidisciplinary subject across different school. Although the issue is wide-ranging and complex, the growing philosopruca1 significance of metaphor parallels its increasing ìn educational and psychological significance. This essay provides the groundwork, context and locus for the following discussion, seeking to elucidate and criticÎze various different views on metaphor, and attempting to explore and develop the nature of metaphor. lVletaphor understood as a cognitìve event opens up a new phìlosophical paradigm in the study of language. Metaphor is then irreducible and, to an extent, inexplicab1e. This essay also suggest the ro1e of metaphor. Finally, it is hied to argue that people with 1eaming difficulties also have the metaphorical competence.

      • KCI등재
      • KCI등재

        골격성 전치부 반대교합 아동의 치아성숙도에 관한 연구

        신종현,권민석,김신,정태성 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.3

        전치부 교환기의 반대교합 아동에서는 골격적 특성이 강할수록 상하 치아의 성숙도에 현격한 차이가 있음을 쉽게 관찰할 수 있다. 파노라마 방사선 사진으로 평가가 가능한 상하 치령의 차이가 III급 부정교합의 조기 징후로 개연성이 있다면, 이것은 조기 감별진단의 한 도구로써 가치가 있을 것으로 판단되었다. 부산대학교치과병원 소아치과에 내원한 Hellman 치령 IIA, IIC의 환자 를 대상으로, 측두방사선사진, 파노라마 방사선사진, 석고 모형과 임상사진을 조사하여 정상교합군과 전치부 반대교합군 각 50명을 선택하였다. 이들의 파노라마 방사선사진을 이용하여 Demirjian법으로 각 군의 상하 치령 및 제1대구치 맹출율을 구하고 그 차이를 비교, 분석하여 다음과 같은 결과를 얻었다. 1. 정상교합군과 반대교합군 모두에서 역령에 비해 치령이 높게 나타났으며 성차는 보이지 않았다(p>0.05). 2. 정상교합군과 반대교합군의 상하 치령의 차이는 각각 0.22세와 0.69세로 반대교합군에서 더 큰 차이를 보였다(p<0.05). 3. 정상교합군에 비해 반대교합군에서 상하 제1대구치 맹출율의 차이가 크게 나타났다(p<0.05). It was easy to find that children of a skeletal anterior crossbite in the early mixed dentition period showed a stark difference in the dental maturity between their maxillary and mandibular teeth, if they have stronger physical characteristics. If the difference of dental age between maxillary and mandibular teeth which can be identified via panoramic radiographs may serve as an early sign of class III malocclusion, this is considered valuable as a tool of early detection diagnosis. We obtained lateral cephalometric radiographs, panoramic radiographs, working model and clinical images of patients of Hellman dental age IIA and IIC who visited the department of pediatric dentistry, Pusan National University Dental Hospital and examined them to select 50 patents for normal occlusion group and skeletal anterior crossbite group, respectively. Their panoramic radiographs were used for the Demirjian's method to figure out dental ages of maxillary and mandibular teeth of each group and the eruption rate of the first molars. Their differences are as follows: 1. In both groups, the dental ages from Demirjian's method were advanced than the chronological ages. No sexual dimorphism was detected for the chronological or dental age in either group (p>0.05). 2. The difference of dental age of maxillary and mandibular teeth between the normal occlusion group and crossbite group was 0.22 and 0.69 years, respectively, with a higher difference in crossbite group(p<0.05). 3. Compared to the normal occlusion group, the crossbite group showed a higher difference in the eruption rate between maxillary and mandibular first molar(p<0.05).

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