• 복식
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• 제54권7호
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• pp.55-62
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• 2004

Research into the ancient dyeing and weaving culture is of critical importance to the fact that they constitute an integral part of the Korean costume. Due to the absence of the originals reflecting ancient costume cultures, it is difficult to figure out what the dyeing and weaving culture was like in ancient times. Because of limited visual materials available from the wall paintings of ancient tombs, studies conducted so far concerning the costume culture for the Goguryeo have focused on visual elements such as shape, structure, and type. As a result, research into ancient Korean dyeing and weaving cultures hasn't been properly made. Thanks to the presence of both some dyeing fabric originals from Goguryeo's neighboring countries and some visual materials like the wall paintings of the Goguryeo, it may be possible to obtain some clues to the dyeing and weaving culture. The dotted Pattern costumes were selected such as Muyongchong, No. 1 Jangcheon Tomb, Gakjeochong, Samsilchong, Ssangyeongchong, Susanri Tomb. According to a book titled ‘Hanwon’, the Goguryeo people manufactured fabrics in such a way that resist-dyed spots produced elaborate patterns over the purple fabric. It can be safely said that such dot patterns were produced by means of dyeing rather than weaving, because identical patterns aren’t well produced by means of painting and embroidery. Considering Goguryeo’s natural features, the dot patterns mentioned in historical literatures are thought to have been produced using animal’s skin. However, there is highest possibility that the dot Patterns were Produced using tie-resist dyeing or wax-resist dyeing techniques. With respect to the dyeing and weaving culture for the Goguryeo, one must refer to neighboring countries’ dyeing and weaving environments, given that the Goguryeo had engaged substantial cultural exchanges with China.

• 한국멀티미디어학회논문지
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• 제21권10호
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• pp.1171-1181
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• 2018

Most simulated shooting systems are TDM based method and dot type laser has been used. The proposed laser pattern based simulated shooting system is a new approach. It can distinguish shooters by calculating the angle of bar shaped laser pattern by each shooter. Unlike the existing TDM method, it is possible to distinguish shooters and lanes by patterns so that there is no time division restriction like TDM method. It is also possible to recognize overlapped impact points of laser patterns launched by multiple shooters. After the laser pattern based simulated shooting system was implemented, general shot and overlapped shot were tested for each lane. Through experiments, we confirmed the possibility of continuous shooting. In addition, it is possible to separate the pattern by each lane, and 100% recognition result was obtained even if impact points overlapped.

• 복식
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• 제56권3호
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• pp.42-56
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• 2006

The purpose of this study is to review the literatures and the wall paintings of the ancient tombs of Koguryo in an effort to try to understand the characteristics of the culture of dyeing in Koguryo. The research findings follow: 1. The colors that were in vogue in Koguryo are five cardinal colors (red, blue, white, black, and yellow) and compound colors, like purple and green. Those colors were used in some or all parts of the clothing and even on some parts of the body. 2. Some clothing of Koguryo as shown in the wall paintings were made with a single and solid color by dip dyeing method. But the majority of the clothing had a variety of patterns. Among the patterns, the geometrical dot pattern took the majority. 3. The dyeing techniques used in Koguryo were printing, yarn dyeing, embroidery, wax resist dyeing, drawing and painting. The development of yarn dyeing method, weaving with silk-threads dyed in various colors, enabled to produce Geum fabrics, which were used for the upper classes' clothing. 4. The esthetic features represented in the colors of Koguryo include the beauty of contrast coloring, preference for red, preference for geometrical patterns, and the harmony of yin and yang.

• 소성∙가공
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• 제20권1호
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• pp.60-63
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• 2011

BLU(back light unit) is one of kernel parts of LCD(liquid crystal display) unit. New 3-D micro-lens pattern for LGP(light guide plate), one of the most important parts of LCD-BLU, had been researched. Instead of dot pattern made by chemical etching or laser ablation, SCS(slanted curved surface) micro-lens pattern was designed with optical CAE simulation. This study introduce the method of design using optical CAE simulation for SCS micro-lens, the new fabrication method of micro-mold with SCS micro-lens pattern.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.523-526
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• 1996

In this paper, robot endeffector tracking using sensory information from structured laser pattern diode, is described. In order to track robot endeffector robustly irrespective of translation, scaling and rotation of robot working tool, structured laser pattern is used as track feature. Structured laser patterns of crosshair, concentric circles, dot matrix, and parallel lines are illuminated to robot endeffector. Illuminated laser patterns are held invariently and coherently irrespective of various motions of robot endeffector. Extracting and tracking these invariant structured laser patterns as track feature, the whole system keeps tracking of the robot endeffector robustly and effectively provided that structured laser pattern is always assumed to aim at robot endeffector.

• 인지과학
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• 제12권4호
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• pp.49-56
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• 2001

입체시 계산 모형들은 국지적으로 대응 가능한 여러 대상들이 있는 경우 가설적인 부등 탐지기들간의 상호 작용을 통해 대응될 대상을 결정한다. 이 연구에서는 인간의 양안시 기제도 입체시 모형들의 가정과 유사하게 부등 탐지기들의 활성화 수준에 따라 대응될 대상을 선택하는 지를 알아보기 위해서 깊이가 다른 두 표면을 가지는 무선점 패턴을 입체 그림으로 사용하였다. 응시 표면과 같은 깊이에 놓여 있는 표면을 구성하는 점들은 무선적으로 선택되었으며(원 무선 패턴) 이 표면보다 앞에 놓여있는 표면을 구성할 점들은 원 무선 패턴의 각 점들과 다음과 같은 방식으로 짝지어졌다. 원 무선 패턴을 구성하는 점들의 위치를 발견하여 왼쪽 입체 그림에서는 무선 점들의 왼쪽 3분에 오른쪽 입체 그림에서는 무선 점들의 오른쪽 3분에 위치하도록 하여 6 분의 깊이에 해당하는 또 다른 표면을 만들었다. 원 무선점 패턴의 자기를 고정시킨 채 새로운 패턴의 밝기를 변화시키면 가설적인 탐지기들의 상대적인 활성화 수준이 서로 달라질 것을 추정할 수 있다. 상대적인 활성화 수준에 따라 대응될 대상이 변화되는 지를 알아보기 위해서 모든 점들의 위치는 고정시킨 채 두 표면을 구성하는 점들간의 상대적인 밝기를 변화시켜가면서 각 밝기 수준에서 두 표면의 깊이를 측정하였다. 쌍을 이루는 점들간의 밝기 차가 30% 이내인 조건에서는 3 분의 부등에 해당되는 하나의 표면이 지각되었지만, 두 점의 밝기가 타이가 날수록 이 표면 이외의 다른 표면과 더불어 모두 두개의 표면이 지각되었다. 특히 새로운 표면의 깊이는 무선점 패턴을 구성하는 점들과 추가된 점들의 상대적 밝기에 따라 달라겠다. 추가된 점들이 밝은 조건에서는 이 점들의 부등에 해당되는 깊이를 갖는 표면이 원 무선점 패턴이 밝은 조건에서는 무선점 패턴의 부등에 해당되는 깊이를 가진 표면이 추가적으로 지각되었다. 이러한 결과는 보다 활성화 된 탐지기들이 약한 탐지기들을 억제하여 있음을 시사한다.

• 전자통신동향분석
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• 제38권1호
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• pp.26-35
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• 2023

Inkjet printing is a typical printing technology with many advantages, such as material cost reduction, noncontact pattern formation without a mask, and process simplification. With the recent and rapid development of ink materials, parts and equipment, and process technologies related to inkjet printing, it is becoming a major process in various areas of the display industry. In particular, for the QD-OLED (quantum dot-organic light-emitting diode) display announced by Samsung Display in 2022, quantum dot pixel production by applying inkjet printing is a key technology. We analyze inkjet printing technology for mass production applied to the display industry and discuss the technology development trends in academia and industry toward the realization of next-generation displays.

• 소성∙가공
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• 제33권4호
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• pp.291-300
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• 2024

To compare the lubrication performance improvement of different laser texturing surface treatment patterns, ring-shaped specimens were prepared by processing line and dot patterns using a fiber laser device. Ring compression tests were conducted to compare the reduction rates of the inner diameter corresponding to the same height reduction of the specimens. Laser processing conditions were set to create patterns with a depth of 9㎛ and a width of 45㎛. Ring specimens were processed with varying spacings between dots and lines. The forging lubricant TECTYL FORM CF 351S was uniformly applied to the upper and lower compression tools, and the rings were compressed by 40% using a hydraulic press, after which the inner diameter was measured. The comparison of inner diameter reduction rates indicated that pattern processing improves lubrication performance, with line patterns being more effective than dot patterns in enhancing lubrication performance.

• 대한기계학회논문집A
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• 제29권3호
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• pp.361-368
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• 2005

LGP(Light-Guide Panel) of LCD backlight is one of the major componets which affect on the product quality of LCD. The LGP with multi-side lamp has been analized for pattern design with the uniform distribution of brightness. When given the uniform distribution of brightness as target, the distribution of dot pattern has been designed for superposed distributions of brightness for each lamp. Multi-side lamp has been tested for various types such as ㄴ-, ㄷ-, and ㅁ -shapes. The present study enhances the possibility of LGP with multi-side lamp by showing the pricise control of brightness distribution.

• 열처리공학회지
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• 제36권3호
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• pp.137-144
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• 2023

Micro electro mechanical systems (MEMS) and precision machines require excellent friction and wear characteristics to improve energy efficiency generated during sliding motion. In this study, DLC thin film with high hardness and low friction was deposited on STS304 substrate material by CVD method, and dot-shaped convex and concave micropatterns were fabricated by photolithography process. The diameter of the pattern was 20 ㎛, the pitch was 40 ㎛, and a pattern having a mesh type arrangement was fabricated and an abrasion test was performed. The results of the wear test on the micro pattern confirmed that the friction coefficient characteristics were improved compared to STS 304 and DLC thin films. In addition, in this result, the micro-pattern showed 11.4% more improved friction coefficient than the DLC thin film. The friction coefficient characteristics for convex and concave patterns of the same size showed almost similar results.