• 한국컴퓨터산업학회논문지
• /
• 제4권12호
• /
• pp.953-964
• /
• 2003

서로 다른 형태와 크기를 가지는 탐색패턴과 움직임 벡터의 분포는 블록 정합 알고리즘에서 탐색 속도와 화질을 좌우하는 중요한 요소이다. 본 논문에서는 크로스패턴과 납작한 육각패턴을 이용한 새로운 고속 블록 정합 알고리즘을 제안한다. 이 알고리즘은 초기에 크로스 패턴을 이용하여 탐색영역의 중심 주위에 분포 확률이 높은 움직임이 작은 벡터를 우선 찾은 다음에 움직임이 큰 벡터에 대해서는 납작한 육각패턴을 이용하여 고속으로 움직임 벡터를 찾게 하였다. 실험결과, 제안된 알고리즘은 육각패턴 탐색 알고리즘에 비하여 움직임 벡터 추정의 속도에 있어서 약 0.2-6.2% 의 성능 향상을 보였으며 화질 또한 PSNR 기준으로 약 0.02-0.3105 의 향상을 보였다.

• 정보처리학회논문지B
• /
• 제10B권7호
• /
• pp.811-814
• /
• 2003

본 논문에서는 십자패턴과 육각패턴을 이용한 고속 블록 정합 동작 예측 기법을 제안한다. 블록 기반 탐색에서 전역 탐색방법이 가장 좋은 동작벡터를 찾지만, 탐색영역 내의 모든 전을 검색하기 때문에 많은 시간을 필요로 하게 된다. 본 방법은 대부분의 동영상에서 동작벡터가 블록의 중심 부근에 집중적으로 분포함을 착안하여 십자패턴으로 중앙을 우선 탐색한 다음 움직임이 큰 동작벡터를 육각패턴을 사용하여 찾는다. 실험결과, 본 방법은 기존의 탐색방법보다 화질과 탐색시간에서 대부분의 경우에 좋은 성능을 보임을 알 수 있다.

• 소성∙가공
• /
• 제31권5호
• /
• pp.281-289
• /
• 2022

Presently, 3D printers manufactured by material extrusion are economical and easy to use, so they are being used in various fields. However, this study conducted a tensile test on the infill pattern and density of the PLA+ material, due to the limitations of long printing time as well as low mechanical strength. The infill area for the infill density change was measured, using a vision-measuring machine for four infill patterns (concentric, zigzag, honeycomb, and cross) in which the nozzle path was the same for each layer. The tensile strength/weight[MPa/g] and tensile strength/printing time[MPa/min] of the tensile specimens were analyzed. In this study, efficient infill density and patterns are suggested, for cost reduction and productivity improvement. Consequently, it was confirmed that the infill area and infill percentage of the four patterns, were not constant according to the infill pattern. And the tensile strength of the infill density 40% of the honeycomb pattern and infill density 20% of the cross pattern, tended to highly consider the weight and printing time. Honeycomb and cross patterns could reduce the weight of the tensile specimen by 19.11%, 28.07%, as well as the printing time by 29.56%, 52.25%. Tensile strength was high in the order of concentric, zigzag, honeycomb, and cross patterns, considering the weight and printing time.

• 한국의류산업학회지
• /
• 제2권4호
• /
• pp.360-365
• /
• 2000

This research is the trial for the computation of the ease-rate for the bodice pattern. The result of the analysis about the cross section figures of garment space by using a 3-D measuring instrument is that: The garment space of each bodice by each body size is definite. In the figure of cross section of the basic lines, an area of cross section of garment space and length of cross section of garment space are not increased in proportion to an area of cross section of the body. The ease rate is the same no matter that flat-rate of the body is same or different. The ease-rate is computed by length of cross section of garment space that is in proportion to the radius of the body.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제16권4호
• /
• pp.249-256
• /
• 2012

In this work, we analyze the spatial patterns of a predator-prey system with cross diffusion. First we get the critical lines of Hopf and Turing bifurcations in a spatial domain by using mathematical theory. More specifically, the exact Turing region is given in a two parameter space. Our results reveal that cross diffusion can induce stationary patterns which may be useful in understanding the dynamics of the real ecosystems better.

• 한국의류학회지
• /
• 제47권1호
• /
• pp.123-136
• /
• 2023

To develop smart sportswear capable of measuring biometric data, we created a close-fitting pattern using two- and three-dimensional (2D and 3D, respectively) methods. After 3D virtual fitting, the tightness of each pattern was evaluated using image processing of contact points, mesh deviation, and cross-sectional shapes. In contact-point analysis, the 3D pattern showed high rates of contact with the body (84.6% and 93.1% for shirts and pants, respectively). Compared with the 2D pattern, the 3D pattern demonstrated closer contact at the lower chest, upper arm, and thigh regions, where electrocardiography and electromyography were primarily carried out. The overall average gap was also lower in the 3D pattern (5.27 and 4.66 mm in shirts and pants, respectively). In the underbust, waist, thigh circumference, and mid-thigh circumference, the cross-section distance between clothing and body was showed a statistically significant difference and evenly distributed in the 3D pattern, exhibiting more closeness. The tightness and fit of the 3D smart sportswear sensor pattern were successfully evaluated. We believe that this study is critical, as it facilitates the comparison of different patterns through visualization and digitization through 3D virtual fitting.

• 대한한의진단학회지
• /
• 제22권1호
• /
• pp.33-44
• /
• 2018

Objectives This study aimed to perform a cross-cultural translation of 5 kinds of pattern identification questionnaires from Korean to English: questionnaires for seven emotions, fatigue and malaise, phlegm, food retention, and blood stasis. Methods We followed the strict guideline on the cross-cultural translation of healthcare evaluation tool. Total five stages of study were conducted. First, translations of two individual translators. Second, synthesizing of the two results. Third, two back translations from synthesized version to Korean. Fourth, expert committee reviewed with the original version, synthesized version, back translated versions to make a pre-final version. Last, with the pre-final version, 5 Americans evaluated face validity of the pre-final version. We made a final version after the above-mentioned 5 stages. Result and conclusion International versions of the 5 kinds of pattern identification questionnaires were completed. We can expect this versions are widly used for clinical usage and following academical researches.

• 대한치과교정학회지
• /
• 제27권1호
• /
• pp.35-44
• /
• 1997

저작은 기본적으로 Brain system의 central pattern generator(CPG)에 의해 조절되며, CPG로 부터 target 기관까지의 출력(output)은 oral sensory feedback에 의해 변형된다. 전치부 반대교합은 이 feedback mechanism에 영향을 미치어 muscle activity와 jaw movement를 바꾼다. 본연구는 정상교합자와 전치부 반대교합자의 muscle activity와 jaw movement pattern의 차이를 알고자 시행하였다.대상은 각각 성인남녀 30명씩으로 하였으며 측정은 Biopak system의 EMG와 EGN을 사용하여 얻은 결과는 다음과 같다. 1. Resting시 실험군이 정상군보다 모든 근육(좌측 악이복근 제외)에서 높은 근활성도를 보였다. 2. Clenching시는 정상군과 실험군간의 유의차가 없었다.(우측 악이복근 제외) 3. Swallowing시는 정상군이 좌우측 교근과, 우측 후측두근 에서 실험군보다 높은 근활성도를 보였다. 4. 최대 개폐구속도는 정상군이 실험군보다 큰 값을 보였다. 5. 최대개구량과 최대전후방운동량 및 측방변위량은 정상군이 실험군보다 큰 값을 나타냈다.

• 복식
• /
• 제66권8호
• /
• pp.46-60
• /
• 2016

Countries have different brassiere patterns, and this study produced and compared 3/4 brassiere patterns from different countries to determine the difference in patterns, and to investigate the stress distribution and shape of cross section while wearing brassieres using 3D virtual fitting system. Despite the growing interest in underwear, there is a lack of related books and research on brassiere patterns, which causes the difference in sizes and pattern drafting methods by countries. Thus, research on this is needed. 3D virtual fitting system has been introduced to compare patterns, thereby improving visible effects and reducing the loss in cost caused by underwear pattern fitting test. According to the result of pattern analysis, The Secoli type exhibited the least breast cover rate (14.9 cm), while the largest cover rate was shown in Christina and ESMOD types (17.7 cm). It is believed that the difference in pattern drafting causes the difference in the total length of a brassiere. Furthermore, the Secoli, Moda Burgo, and ESMOD brassieres drafted from basic bodice pattern were found to be longer than the Christina and Han Sunmi brassieres attained from direct pattern drafting. Moreover, the darts' volume of upper and lower cups in Christina and Han Sunmi types was similar in shape. The shapes of cradle drafted from basic bodice pattern were a straight line, while those from direct drafting formed a curved shape. In fitting multiple cross sections, the Secoli, Moda Burgo, and ESMOD brassieres had gaps between the brassieres and the body. Among these, the largest number of gaps was observed in the ESMOD type pattern. This study aimed at performing comparative analysis of various brassieres' pattern drafting types as a basic research for developing a brassiere pattern drafting type.

• 방송공학회논문지
• /
• 제10권3호
• /
• pp.357-371
• /
• 2005

본 논문에서는 CDS(Cross-Diamond Search algorithm) 및 CDHSs(Cross-Diamond-Hexagonal Search algorithms)의 성능을 향상시키기 위하여 탐색 영역의 위치에 따라 최적의 탐색 형태를 적용하는 CDTS(Cross-Diamond-Triangle Search algorithm)를 제안한다. CDTS에서 탐색 영역의 위치에 따라 최적의 탐색 형태를 적용하기 위하여 다양한 실험 영상들의 움직임 분포를 먼저 분석하였다. 분석된 움직임 분포에 근거하여 CDTS 구현 시 탐색 영역 중심부에서는 십자 탐색 형태와 다이아몬드 탐색 형태를 적용하고, 나머지 탐색 영역에서는 삼각 탐색 형태와 다이아몬드 탐색 형태를 적용한다. CDTS에서 제안하는 삼각 탐색 형태는 기존 탐색 알고리즘에서 사용하는 대칭형 구조와는 다르게 비대칭형 구조를 가지고 탐색점을 더욱 감소시키는 효과를 제공하면서도 화질을 유지할 수 있다. CDTS를 CDS 및 CDHSs와 비교하였을 때 화질 열화 없이 각각 평균 16.22$\%$ 및 3.09$\%$ 정도의 탐색점 감소 효과가 나타났다.