• 방송공학회논문지
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• 제14권1호
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• pp.81-84
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• 2009

본 논문은 시점에 따른 형상의 변화를 이용하여 물체의 특성을 나타내는 기법을 제안한다. 구체적으로, 3차원 물체의 여러 시점별 형상을 추출한 후, 이를 지역적 선형 사상을 통해 차원 축소하여 저차원 분포를 생성하고, 이를 이용하여 물체의 특성을 나타낸다. 또한, 생성된 점집합들에 반복적 최근접점 기법 및 푸리에 변환을 적용하여 유사한 모델을 검색하는 기법과 그 결과를 제시한다. 제안하는 기법은 다양한 시점에서의 형상 자체만이 아니라 시점에 따른 형상의 변화도 물체의 특성을 표현한다는 것을 보여주며, 검색 등 물체 특성을 표현하는데 적용될 것으로 기대된다.

• 한국인터넷방송통신학회논문지
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• 제11권6호
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• pp.283-288
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• 2011

본 연구에서는 객체 코너의 분산치에 기반한 코렐로그램 형태검출 기법을 제안한다. 제안된 알고리즘은 다음 단계로 진행된다. 먼저 영상 내 객체의 코너 점을 추출한 후 이들의 분산치를 구한다. 그리고 각각의 코너영역들의 분산치 중 최대/최소값을 추출한다. 그리고 이 최대/최소값을 이용하여 코렐로그램 매핑을 한 후 유사도를 측정하게 된다. 제안된 기법은 영상 내에서 형태 구조가 분명한 객체의 실험에서 성능이 우수하였으며 객체의 이동이나 회전에도 강인하였으며 코너 패치 히스토그램을 이용한 형태 검색에 비해 약 0.03%의 향상된 recall을 나타내었다.

• 디지털산업정보학회논문지
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• 제7권1호
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• pp.63-74
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• 2011

LED design works make user experience the conditions of time and space, and enable maximized spatial exploration and pursuit of ultimate sources. Light itself includes an ample dimension of time and, through the process of on and off, time-duration, similarity, and discontinuation is reorganized. LED design works make people experience the conditions of time and space, and enable maximized spatial exploration and pursuit of ultimate sources. LED design have been approached more from the viewpoint of material than from the viewpoint of aesthetics. LED based environmental design will be embedded deeply into our life with the technology of ubiquitous city. As the problem of the light intensity, tempo of change LED motion graphic and colors, substitutability is almost completely resolved now, LED is have more potentials than any other material as a tool of motion graphic. These result well make that using of LED is could be better useful from now on. In edition, users could be offered better beneficial lighting environment, and they will enjoy their better lives in the future.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.371-372
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• 2006

This study was carried out to analyze the effect of wind load on the structural stability of a container crane according to the change of the boom shape using wind tunnel test and provide a container crane designer with data which can be used in a wind resistance design of a container crane assuming that a wind load 75m/s wind velocity is applied in a container crane. Data acquisition conditions for this experiment were established in accordance with the similarity. The scale of a container crane dimension, wind velocity and time were chosen as 1/200, 1/13.3 and 1/15. And this experiment was implemented in an Eiffel type atmospheric boundary layer wind tunnel with $11.52m^2$ cross-section area. Each directional drag and overturning moment coefficients of a container crane according to the change of the boom shape were investigated.

• 디자인학연구
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• 제15권1호
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• pp.5-14
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• 2002

Fractal which was named by Mandelbrot in 1975 and its theory have been taken notice of many fields of scholarship, namely mathematics, physics, geography, architecture, art, philosophy and so on. If we approach Fractal on the basis of the designing cogitation, it can be used not only as one of materials to take a crease thinking in design, also as a due of the methods to assess the design problem with a new point of view. Based on above background, in this study, it was studied on the graphic artist, Morits Collelius Escher who has been well known as the great artist of illusion," and on the attributes of Fractal which were contained in his various work\ulcorner As a reset, the four attributes, namey ′fractal dimension′, ′self-similarity, ′recursiveness′and ′infinity were founded in his works. Also, it was founded that Escher had employed the attributes of Fractal in his almost works for "the representation of the condition of unified-duality," that is to say, for the union of two different dimensions. After this, it is expected that this study shoed be extended to the development of the principle of Fractal-Design on the basis of ′Fractal which can be defined as the phenomenon of repetitious pattern between chaos and order and′the formative beauty of Fractal′.

• 한국컴퓨터정보학회논문지
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• 제17권4호
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• pp.75-82
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• 2012

PPG 신호는 심장의 박동에 동기된 유사 주기 신호이다. 본 논문에서는 PPG 신호의 유사주기성을 이용한 주기적 이동평균필터 방법을 제안한다. 이 필터링 방법은 PPG 신호를 주기적으로 분리하여 각 주기 신호의 같은 순번에 있는 샘플들끼리 평균을 취하는 방법이다. 연속된 PPG 신호의 주기 중에 동잡음이 혼입되었다면 주기를 기준으로 PPG 신호를 분리한 후, 각 주기의 샘플수를 조정하여 같은 샘플수를 가지게 만든다. 이 주기들을 2차원으로 배열한 후 현재 주기부터 이전 각 주기의 샘플끼리 평균을 취함으로써 훼손 없이 동잡음을 제거할 수 있었다.

• 동아시아경상학회지
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• 제7권3호
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• pp.63-73
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• 2019

Purposes - In this research, we look over and investigate associations between shopping items and the demographics of foreign tourists in South Korea. The related seven variables are gender, age, occupations, country of residence, visit month, visit purpose and trip type. In addition, we can graph twenty-one shopping items in association with the demographics of foreign tourists by computing their dissimilarity or similarity on two dimension planes granting that the association exists between the underlying variables. Research design and methodology - This research is performed by Ministry of Culture and Tourism in 2017 and investigated 13,200 foreign tourists from 20 countries. For analyzing the detailed relationships between shopping items and the demographics of foreign tourists, we take advantage of both independent test and correspondence analysis as key statistical techniques. Results - The findings show that shopping items which foreign tourists purchase are closely associated with the three different demographics variables such as country of residence, tour type and visit purpose by monitoring significant p-value of chi-squared statistic Conclusions - This study suggests Ministry of Culture, Sports and Tourism must explore ways toward tourism infrastructure such as global marketing, municipality strategy for attracting foreign tourists, development of diverse shopping items and services and so on.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 Asia Navigation Conference
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• pp.87-94
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• 2006

In this study we carried out to analyze the effect of wind load on the structural stability of a container crane according to the change of the boom shape using wind tunnel test and provided a container crane designer with data which can be used in a wind resistance design of a container crane assuming that a wind load at 75m/s wind velocity is applied on a container crane. Data acquisition conditions for this experiment were established in accordance with the similarity. The scale of a container crane dimension, wind velocity and time were chosen as 1/200, 1/13.3 and 1/15. And this experiment was implemented in an Eiffel type atmospheric boundary-layer wind tunnel with $11.52m^2$ cross-section area. Each directional drag and overturning moment coefficients were investigated and uplift forces at each supporting point due to the wind load were analyzed.

• 융합신호처리학회논문지
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• 제2권1호
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• pp.28-37
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• 2001

본 논문에서는 이진 영상의 2차원 히스토그램을 이용하여 추출한 형태 정보와 HSI 컬러 좌표를 이용한 색상 정보를 결합한 영상 검색 기법을 제안한다. 또한, 제안된 방식은 부분영상의 유사도 비교를 통한 영상의 위치 정보를 추출한다 이 검색 기법을 형태 정보와 색상 정보에 활용함으로써 이진 영상으로 비교가 힘든 영역 정보의 검색도 가능하게 한다 그 결과 기존의 색상기반 영상 검색 기법에 비해 제안된 기법은 Frecision/Recall로 표현된 정량적 결과에서 훨씬 우수한 성능을 보임을 실험으로 확인할 수 있다. 특히, 제안된 검색 기법은 영상의 회전이나 객체의 이동 등이 발생한 영상에 대해서도 우수한 검색 효율을 보인다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.838-841
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• 2005

This study was carried out to analyze the effect of wind load on the structural stability of a 50ton articulation type container crane using wind tunnel test and provide a container crane designer with data which can be used in a wind resistance design of an articulation type container crane assuming that a wind load 75m/s wind velocity is applied in an articulation type container crane. Data acquisition conditions for this experiment were established in accordance with the similarity. The scale of an articulation type container crane dimension, wind velocity and time were chosen as 1/200, 1/13.3 and 1/15. And this experiment was implemented in an Eiffel type atmospheric boundary layer wind tunnel with $11.52m^2$ cross-section area. Each directional drag and overturning moment coefficients were investigated and uplift forces at each supporting point due to the wind load were analyzed.