• 한국콘텐츠학회논문지
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• 제13권6호
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• pp.77-85
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• 2013

본 연구는 중국 최초의 대형 역사 무용극을 표방한 서안의 <장한가> 라는 작품 속에 들어있는 영상이미지의 공연효과를 분석하고자 한 것이다. 즉 <장한가> 작품 속에 들어 있는 특정 주제, 소재들을 표현함에 있어 어떠한 영상이미지를 사용하여 공연의 효과를 거두고 있는가에 대한 것이다. 영상이란 '사물의 모습이 반영된 상', 특히 영화, 텔레비전, 사전 등의 이미지를 의미하는 말로 그 범위는 매우 넓으며 image의 어원은 imitary에 근거를 둔 것으로 구체적 또는 심적으로 나타낼 수 있는 시각적 표시를 말한다. 따라서 영상이미지는 '영상'과 '이미지' 라는 동의어의 결합으로 볼 수 있는데 여기서 영상이란 단순히 시나리오의 문학성, 연극성, 미술성 등과 같이 전통적인 예술장르의 종합이 아니라 모든 예술의 본원적 기능을 통합하고 인간존재의 오묘한 이미지 활동을 연결한 결과로서의 총체라고 보는 것이다. 연구결과는 다음과 같다. <장한가>에 표현되는 영상 이미지의 효과로 첫째, 시대성과 문화를 반영한 함축적 의미의 표현 효과 둘째, 상상적 동일시 효과, 셋째, 장면전환의 효과 넷째, 몰입을 통한 극적 재미의 효과, 다섯째, 공연의 입체감을 통한 시각적 효과가 있음을 알 수 있었다.

• 보건행정학회지
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• 제23권4호
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• pp.415-426
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• 2013

Background: This study was aim to identify the specific words and to develop the scale for the public health center (PHC) image. Methods: We collected 824 words from the previous studies and by open questions and reduced them by 77 words, then which were rated properly by 355 citizens of Seoul. We examined explanatory factor analysis for 69 words, and examined content validity test and confirmatory factor analysis (CFA) for the image structures (4 factors and 16 words). And then we developed the image questionnaire using them through council. We conducted a survey and retested the PHC image scales as the measuring tool targeting 2,000 persons, and compared the inexperience and experience persons for PHC usage. Results: The image structures were consisted of 4 factors and 16 words such as 'trustworthiness' (warm, exemplary, faithful, service-mindedness, beneficial to health), 'fairness' (honesty, clear, consistent, ruled), 'development possibility' (changing, goal-directed, developmental, propulsive), and 'flexibility' (not authoritative, not perfunctory, not rigid) in total. Cronbach's ${\alpha}$ values of all factors were above 0.7. As a result of CFA, model fit indexes yielded satisfactory results (root mean square error of approximation [RMSEA] 0.049, goodness of fit index [GFI] 0.937, and adjusted goodness of fit index [AGFI] 0.912). According to the result of retest for measuring tool by using other samples, Cronbach's ${\alpha}$ values were above 0.8, and model fit indexes yielded satisfactory results (RMSEA 0.059, GFI 0.952, AGFI 0.933). RMSEAs of the inexperiences and the experiences were each 0.59, 0.68. Conclusion: A reliable, valid, and generalizable scale was created for PHC image.

• 대한방사선기술학회지:방사선기술과학
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• 제45권2호
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• pp.145-150
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• 2022

The main purpose of this work was to restore the blurry chest CT images by applying a blind deconvolution algorithm. In general, image restoration is the procedure of improving the degraded image to get the true or original image. In this regard, we focused on a blind deblurring approach with chest CT imaging by using digital image processing in MATLAB, which the blind deconvolution technique performed without any whole knowledge or information as to the fundamental point spread function (PSF). For our approach, we acquired 30 chest CT images from the public source and applied three type's PSFs for finding the true image and the original PSF. The observed image might be convolved with an isotropic gaussian PSF or motion blurring PSF and the original image. The PSFs are assumed as a black box, hence restoring the image is called blind deconvolution. For the 30 iteration times, we analyzed diverse sizes of the PSF and tried to approximate the true PSF and the original image. For improving the ringing effect, we employed the weighted function by using the sobel filter. The results was compared with the three criteria including mean squared error (MSE), root mean squared error (RMSE) and peak signal-to-noise ratio (PSNR), which all values of the optimal-sized image outperformed those that the other reconstructed two-sized images. Therefore, we improved the blurring chest CT image by using the blind deconvolutin algorithm for optimal approach.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.200-200
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• 2017

Salinity stress is one of the most important abiotic stresses and severely impairs plant growth and production. Root is the first site for nutrient accumulation like as $Na^+$ in the plant. To investigate the response of wheat root under salinity stress, we executed the characterization of morphology and analysis of metabolites. Wheat seeds cv. Keumgang (Korean cultivar) were grown on the moist filter paper in Petri dish. After 5 days, seedlings were transferred to hydroponic apparatus at 1500 LUX light intensity, at $20^{\circ}C$ with 70% relative humidity in a growth chamber. Seedlings (5-day-old) were exposed to 50mM, 75mM, 100mM NaCl for 5 days. Ten-day-old seedlings were used for morphological characterization and metabolite analysis. Root and leaf length became shorter in high NaCl concentration compared to following NaCl treatment. For confirmation of salt accumulation, wheat roots were stained with $CoroNa^+$ Green AM, and fluoresce, and the image was taken by confocal microscopy. $Na^+$ ion accumulation rate was higher at 100mM compared to the untreated sample. Furthermore, to analyze metabolites in the wheat root, samples were extracted by $D_2O$ solvent, and extracted sample was analyzed by 1H NMR spectroscopy. Fourteen metabolites were identified in wheat roots using NMR spectroscopy. Methanol and ethanol were up-regulated, whereas formate, aspartate, aminobutyrate, acetate and valine were down-regulated under salinity stress on roots of wheat. Fumarate had no change, while glucose, betaine, choline, glutamate and lactate were unevenly affected during salinity stress.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.132-132
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• 2017

Plants, including Platycodon grandiflorum have been used globally across varied cultures as a safe natural source of medicines. From time immemorial, humans have relied on plants that could meet their basic necessities such as food, shelter, fuel and health. This study was executed to profile proteins from the hormone induced diploid and tetraploid roots using high throughput proteome approach. Two dimensional gels stained with CBB, a total of 64 differential expressed proteins were identified from the diploid root using image analysis by Progenesis SameSpot software. Out of total differential expressed spots, 20 differential expressed protein spots ( ${\geq}1.5-fold$) were analyzed using LTQ-FTICR MS whereas a total of 13 protein spots were up regulated and 7 protein spots were down-regulated. However, in the case of tetraploid root, a total of 78 differential expressed proteins were identified from tetraploid root of which a total of 28 differential expressed protein spots (${\geq}1.5-fold$) were analyzed by mass spectrometry whereas a total of 16 protein spots were up regulated and a total of 12 protein spots were down-regulated. However, proteins identified using iProClass databases revealed that the identified proteins from the explants were mainly associated with the nucleic acid binding, oxidoreductase activity, transporter activity and isomers activity. The exclusive protein profile may provide insight clues for better understanding the characteristics of protein function and its metabolic activity that can help for the development of the nutritional and breeding aspects of this economically important medicinal plant.

• Imaging Science in Dentistry
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• 제45권3호
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• pp.153-158
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• 2015

Purpose: The purpose of this study was to evaluate and compare the efficacy of cone-beam computed tomography (CBCT) and digital intraoral radiography in diagnosing simulated small external root resorption cavities. Materials and Methods: Cavities were drilled in 159 roots using a small spherical bur at different root levels and on all surfaces. The teeth were imaged both with intraoral digital radiography using image plates and with CBCT. Two sets of intraoral images were acquired per tooth: orthogonal (PA) which was the conventional periapical radiograph and mesioangulated (SET). Four readers were asked to rate their confidence level in detecting and locating the lesions. Receiver operating characteristic (ROC) analysis was performed to assess the accuracy of each modality in detecting the presence of lesions, the affected surface, and the affected level. Analysis of variation was used to compare the results and kappa analysis was used to evaluate interobserver agreement. Results: A significant difference in the area under the ROC curves was found among the three modalities (P=0.0002), with CBCT (0.81) having a significantly higher value than PA (0.71) or SET (0.71). PA was slightly more accurate than SET, but the difference was not statistically significant. CBCT was also superior in locating the affected surface and level. Conclusion: CBCT has already proven its superiority in detecting multiple dental conditions, and this study shows it to likewise be superior in detecting and locating incipient external root resorption.

• Imaging Science in Dentistry
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• 제53권1호
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• pp.77-82
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• 2023

Purpose: This study evaluated anatomical variations in the root canals of the lower premolars and molars in a Brazilian sub-population using cone-beam computed tomography (CBCT). Materials and Methods: In total, 121 CBCT images of patients were selected from a database. All images contained lower first and second premolars and molars on both sides of the arch, fully developed roots, and no treatment, resorption, or calcifications. In each image, the root canals of the lower premolars and molars were evaluated according to the Vertucci classification in On-Demand 3D software in the multiplanar reconstruction with dynamic navigation. Twenty-five percent of the images were re-assessed to analyze intraobserver confidence with the kappa test. Data were statistically evaluated with linear regression to evaluate the correlations of anatomic variations with age and sex, and the Wilcoxon test to analyze the laterality of variations, with a significance level of 5%. Results: The intraobserver agreement (0.94) was excellent. In general, the root canals of lower premolars and molars showed a higher prevalence of type I than other Vertucci classification types, followed by type V in premolars and type II in molars. When the molar roots were evaluated separately, type II was more frequent in mesial roots and type I in distal roots. Although age showed no correlations with the results, sex and laterality showed correlations with tooth 45 and the lower second premolars, respectively. Conclusion: The lower premolars and molars of a Brazilian sub-population showed a wide range of root canal anatomic variations.

• 대한방사선기술학회지:방사선기술과학
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• 제32권1호
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• pp.17-24
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• 2009

노이즈를 평가하는 방법은 Root Mean Square(RMS) 입상도, 자기상관함수, 위너스펙트럼이 있다. RMS입상도는 광자데이터의 표준편차로 나타내며, 자기상관함수는 거리변화에 따른 1차원함수를 중적분하여 얻어진다. 그리고 자기상관함수를 푸리에 변환하면 노이즈 파워 스펙트럼이 되고, 화상에서는 이것을 위너스펙트럼이라고 한다. 위너스펙트럼은 노이즈 자체만을 표현할 뿐 아니라 해상특성을 나타내는 Modulation Transfer Function(MTF)과 함께 Detective Quantum Efficiency(DQE)를 산출하는 중요한 요소가 된다. 제시된 위너스펙트럼의 평가기술은 교육현장에서 그 개념을 교육하거나 임상 환경에서 시설에 알맞은 디지털 영상 검출기를 선택하고 디지털 영상 시스템의 영상품질을 유지 보수하는데 도움이 될 것으로 기대한다.

• 복식
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• 제57권10호
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• pp.112-128
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• 2007

As fantasy films in which super heroes with superhuman abilities play an active part are rapidly becoming more popular, super hero stories are taking root as a new genre in fantasy films. The costumes in films play an important role in visualizing the virtual reality of fantasy films when those costumes are worn by characters so as to express and define them. In the meantime, in the antagonistic structure of good versus evil as a typical subject in these films, it may be said that the costumes of super heroes who advocate good and those of villains who represent evil have been created as an image of power. In this sense, it is necessary to establish an analytic system of how images of the power of good and evil are visually created in costumes for fantasy films. As such, this study seeks to analyze costumes in fantasy films more systemically through semiotic, which has taken root as a science of analysis in all areas of science. From the perspectives of aesthetic semiotic developed by Morris and costume aesthetics, the syntactical dimension is analyzed into formative elements and the principles of costumes; factual and expressive meanings, themes, and inherent meaning, all of which are immanent in costumes, are elicited in the semantic dimension; and the influence of costumes on viewers is described as identification in terms of pragmatics. This study provided a system to analyze costumes in fantasy films(especially 'Superman', 'Batman' and 'Spiderman') from the perspective of Morris' semiotic, and based on the analytic system, examined how 'power' is revealed in the costumes of super heroes and ruffians, and what it implies.

• 한국정보전자통신기술학회논문지
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• 제2권4호
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• pp.19-28
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• 2009

본 연구에서는 웨이블렛 변환에 기반한 EZW알고리즘을 적용하여 효율성 있는 영상 압축방법을 제시하였다. 이 방법은 영상을 Daubechies 필터에 의하여 웨이블렛 변환하고 대역간 웨이블렛 계수들의 상관관계를 이용하여 제로트리 부호화하는 EZW 알고리즘을 적용하여 웨이블렛 계수의 크기가 임계값이상이면 POS, NEG 심볼로 분류하고 임계값 이하이면 IZ, ZTR 심볼로 분류하여 주 부호화과정과 종속 부호화과정을 수행하며 임계값을 반으로 줄이면서 부호화과정을 반복하는 영상압축방법이다. 본 연구에서 제시한 방법을 수행하여 영상압축한 결과를 정지영상압축방법에 사용되는 JPEG알고리즘에 의하여 수행한 영상압축결과와 비교한 결과 본 연구에서 제시한 영상압축결과가 부호화 복호화에서 원하는 비트율로 조절할 수 있고 낮은 비트에서 우수한 PSNR값을 나타내며 블록현상이 발생하지 않아 JPEG의 영상압축방법보다 우수하다는 것을 확인하였다.