• 한국컴퓨터정보학회논문지
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• 제16권2호
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• pp.55-60
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• 2011

본 논문에서는 요부 영상에서 근육을 추출하는 방법을 제안한다. 제안된 방법은 초음파 영상에서 왜곡이 존재하지 않는 영역을 측정할 근육 영역으로 설정한 후, 초기 초음파 영상에서 불필요한 잡음을 제거하고 Ends-in Search Stretching 기법을 적용하여 근육 영역의 명암 대비를 강조한다. 그리고 형태학적 특징을 이용하여 등뼈 영역과 피하지방을 분리한 후, 4 방향 윤곽선 추적 알고리즘을 적용하여 피하지방의 하단 부분을 추출한다. 또한 최대 및 최소 명암도를 조정하여 얻어진 등뼈의 후보 영역에서 형태학적 특징을 이용하여 잡음을 제거하고 최종적으로 등뼈 영역을 추출한다. 추출된 등뼈 영역을 기반으로 피하지방층과 등뼈 사이를 근육의 두께로 측정한다. 본 연구에서 제안된 방법을 368개의 요부 초음파 영상에 적용하여 근육 영역을 추출한 결과, 제안된 방법이 초음파 영상에서 근육 영역들의 두께를 측정하는데 기존의 근육 측정 방법보다 효과적인 것을 확인할 수 있었다.

• 복식문화연구
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• 제28권4호
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• pp.492-507
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• 2020

This study aims to develop fashion designs that combine atlas fabric with the characteristics of Uygur costume to modernize the costume of the Xinjiang Uygur. Research contents and methods are as follows. First, based on previous studies, research analysis was conducted on the cultural background, clothing characteristics, and material of Uygur clothing. Second, based on such research contents, designs combining the characteristics of Uygur costume and atlas fabric were presented. Third, to analyze the utilization of atlas fabric and examine fabric characteristics, material was gathered from collections on domestic and foreign web sites. Through field explorations of local museums in the Xinjiang area, minority group culture was observed in more detail. Based on collection of traditional clothing and analysis of its characteristics, fashion designs that apply contemporary trends were developed. General silhouettes without any restrictions to the waist and decorations made using embroidery were often used. Atlas silk, developed in China using Ikat weaving methods, is an important traditional clothing fabric of the minority group Xinjiang. Based on such data collection analysis, the produced works highlighted traditional ethnic characteristics by extracting classical patterns of atlas fabric, modifying or partially expanding them, combining them with hand knitting, and adding contemporary sensations, thus providing confirmations of the possibility of popularizing classic patterns in more practical manners.

• 한국실내디자인학회논문집
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• 제19권3호
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• pp.67-76
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• 2010

Recently the trend that human emotions become central is strongly on the rise beyond functions in the area of space. In the present situation, the current study is to examine the characteristics of experiential space of emotions through an approach to space appearing in kinetic art paying attention to the fact that the new spatial expressions and forms of Kineticism lie in introduction of 'movement' as a phenomenon that humans who are main agents of experiences can perceive. For research methods, spatial expressions were proposed according to each characteristic extracting characteristics to create space through 'movement' of Kineticism, and the features of experiential space of emotion were elicited by analyzing sensible elements and perceptual characteristics which stimulate human sensitivity through expressive aspects of 'movement' appearing in the case. As a result, it was found that characteristics appeared including immersion through non-daily stimulation, empathy through visual·perceptual stimulation, syn-aesthetic experiences through stimulation of thinking senses, and perceptual activation through physical movement etc. Namely, the present study has its meanings in seeking another directions and possibilities as emotional space to activate experiencers' diverse perceptions and senses by analyzing the characteristics of experiential emotional space through 'movement' of Kineticism which is one of modern plastic arts.

• 한국음향학회지
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• 제28권8호
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• pp.697-705
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• 2009

본 논문에서는 단일 채널 다성 음악에서 리듬 악기 신호를 블라인드 (blind) 방식으로 추출하는 방법을 제안한다. 상업적으로 판매되는 음악 신호는 대부분 2개 이하만의 혼합된 채널 형태로 사용자에게 제공되는 반면, 그 혼합 채널 신호에는 각각 가창 음원 (vocal)을 비롯한 많은 종류의 악기가 포함되어 있는 형태이다. 따라서, 혼합 신호의 개수가 음원 개수와 같거나 더 많은 상황을 가정하는 기존의 음원 분리 방법처럼, 혼합 환경이나 신호의 통계적 특성을 모델링하는 것 보다는, 특정 음원의 고유 특성을 활용하는 것이 이처럼 적은 개수의 혼합 신호만을 가지고 있는 환경 (underdetermined)에 더욱 적합하다. 본 논문에서는 다른 화성 악기와 혼합되어 있는 상창에서 리듬 악기 음원만을 추출하는 것을 목표로 한다. 비음수 행렬 인수분해 (NMF: Nonnegative Matrix Factorization)의 변형된 알고리즘인 비음수 행렬의 부분적 공동 분해 (NMPCF: Nonnegative Matrix Partial Co-Factorization)가 입력 행렬의 시간적인 속성과 주파수적인 속성에서 다양한 관계성을 분석하기 위해 활용된다. 또한 특정 시간 단위로 입력 신호를 파편화 (segmentation)하고, 파편들에서 반복적으로 발생하는 성분을 리듬 악기가 공통적으로 포함하고 있는 특성이라고 가정한다. 본 논문에서 제안하는 방법은 일반적으로 받아들여질 수 있을 정도의 성능을 보여주지만, 기본적으로는 사전 정보를 활용하는 타악기 음원 분리 방식보다 우수하지는 않다. 그러나 블라인드 방식의 특성상, 사전 정보를 획득한기에 용이하지 않은 경우, 또는 사전 정보와 현격히 다른 리듬 악기가 연주되는 경우 등에 보다 유연하게 대응할 수 있다.

• Steel and Composite Structures
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• 제49권6호
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• pp.701-711
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• 2023

In order to fully reflect variation characteristics of composite concrete dam health state, the monitoring data is applied to diagnose composite concrete dam health state. Composite concrete dam lesion development to wreckage is a precursor, and its health status can be judged. The monitoring data are generally non-linear and unsteady time series, which contain chaotic information that cannot be characterized. Thus, it could generate huge influence for the construction of monitoring models and the formulation of corresponding health diagnostic indicators. This multi-scale diagnosis process is from point to whole. Chaotic characteristics are often contained in the monitoring data. If chaotic characteristics could be extracted for reflecting concrete dam health state and the corresponding diagnostic indicators will be formulated, the theory and method of diagnosing concrete dam health state can be huge improved. Therefore, the chaotic characteristics of monitoring data are considered. And, the extracting method of the chaotic components is studied from monitoring data based on fuzzy dynamic cross-correlation factor method. Finally, a method is proposed for formulating composite concrete dam health state indicators. This method can effectively distinguish chaotic systems from deterministic systems and reflect the health state of concrete dam in service.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.842-845
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• 2004

The aim of this study is to compare the classification results for choosing the fuzzy membership function within fuzzy rules. There are various methods of extracting rules from training data in the process of fuzzy rules generation. Pattern distribution characteristics are considered to produce fuzzy rules. The accuracy of classification results are depended on not only considering the characteristics of fuzzy subspaces but also choosing the fuzzy membership functions. This paper shows how to produce various type of fuzzy rules from the partitioning the pattern spaces and results of land cover classification in satellite remote sensing images by adopting various fuzzy membership functions. The experiments of this study is applied to Landsat TM image and the results of classification are compared by fuzzy membership functions.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(2)
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• pp.314-317
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• 2000

In order to analyze the characteristics of complicated TFT-LCD (Thin Film Transistor-Liquid Crystal Display) circuits, it is indispensible to use simulation programs. In this study, we present a systematic method of extracting the input parameters of poly-Si TFT for Spice simulation. This method is applied to two different types of poly-Si TFTs fabricated in our group with good results. Among the Spice simulators, Pspice has the graphic user interface feature making the composition of complicated circuits easier. We added successfully a poly-Si TFT model on the Pspice simulator, which would contribute to efficient simulations of poly-Si TFT-LCD pixels and arrays.

• 한국음향학회지
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• 제9권2호
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• pp.34-41
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• 1990

음성신호의 전처리과정에서 에너지 퍼래미터는 음소의 변화특성을 나타내기 때문에 많이 사용하고 있다. 그렇지만 추출과정에서 창함수를 적용하기 때문에 창함수길이에 따른 영향을 받게된다. 본논문에서는 창함수길이에 따른 영향을 측정하고 그 영향을 최소화시키는 에너지추출법을 새로이 제안하였다. 이방법으로 추출된 에너지변화도는 창함수길이의 영향을 제거시켰기 때문에 음소의 변화특성을 잘나타낸다. 또한 계산시간은 샘플당 한번의 뺄셈과 덧셈, 그리고 두 번의 비교연산만 있으면 된다.

• 한국염색가공학회지
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• 제13권5호
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• pp.10-10
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• 2001

The Purpose of this study was to investigate spectrophotometric characteristics of Korean knotweed extracts. The properties were evaluated by it′s extracting solvent, effect of metallic ion, variations of pH values and effect of light exposure. The results were as following; The highest absorbance was found in methanol extract of Korean knotweed, while the lowest absorbance was carbon tetrachloride extract. The UV-vis. spectra of Korean knotweed colors in several solvents showed hypsochromic shift of n-π/sup ＊/ transition with the polarity of solvent. Absorbance and peak of UV-vis. spectra of Korean knotweed colors became lower and broader by addition of metallic ion. The light stability in irradiation with xenon ]amp of the color solution with Cu were higher than those of Al and Fe. The UV-vis. spectra of Korean knotweed extracts in various pH values showed bathochromic shift under alkaline condition, and their peaks disappeared after 5 hours exposure.

• 한국염색가공학회지
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• 제13권5호
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• pp.298-305
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• 2001

The Purpose of this study was to investigate spectrophotometric characteristics of Korean knotweed extracts. The properties were evaluated by it's extracting solvent, effect of metallic ion, variations of pH values and effect of light exposure. The results were as following; The highest absorbance was found in methanol extract of Korean knotweed, while the lowest absorbance was carbon tetrachloride extract. The UV-vis. spectra of Korean knotweed colors in several solvents showed hypsochromic shift of $n->\pi^*$ transition with the polarity of solvent. Absorbance and peak of UV-vis. spectra of Korean knotweed colors became lower and broader by addition of metallic ion. The light stability in irradiation with xenon ]amp of the color solution with Cu were higher than those of Al and Fe. The UV-vis. spectra of Korean knotweed extracts in various pH values showed bathochromic shift under alkaline condition, and their Peaks disappeared after 5 hours exposure.