• 한국전산유체공학회:학술대회논문집
• /
• 한국전산유체공학회 1999년도 추계 학술대회논문집
• /
• pp.158-162
• /
• 1999

This thesis presents applications of three dimensional visualization technique based on shear-warp volume rendering to medical information. Volume rendering is compared to surface rendering and acceleration technique is also presented. The presented rendering techniques by using three-dimensional arrays of data are a widely used representation for computational fluid dynamics and geological structures as well as medical information.

• 패션비즈니스
• /
• 제10권6호
• /
• pp.28-37
• /
• 2006

The purpose of this work is to present three-dimensional models of plain fabrics having various warp and filling yarn diameters. In order to simulate a woven fabric, a 3-dimensional CAD software with NURBS modeling capability was used. Final rendering was performed on the fabric model. It was demonstrated that the changes in yarn diameter could be three-dimensionally modeled through the use of fabric geometry and the 3D CAD. A short RhinoScript program was composed to implement the data importing and model building on the 3D CAD.

• 프린팅코리아
• /
• 제13권4호
• /
• pp.92-95
• /
• 2014

최근 출시된 어도비 포토샵 CC에는 이전에 없던 다양한 신기능이 많이 포함돼 있다. 원근 뒤틀기(Perspective Warp)도 그중의 하나다. 원근 뒤틀기는 이미지에서 서로 다른 원근의 소실점을 정렬해 하나의 완벽한 합성 사진을 만드는 기능이다. 원근 뒤틀기에 대해 알아본다.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2000년도 봄 한국섬유공학회 학술발표회 논문집(Proceedings of the Korean Textile Conference)
• /
• pp.233-236
• /
• 2000

• 한국멀티미디어학회논문지
• /
• 제9권8호
• /
• pp.971-981
• /
• 2006

쉬어-왑 분해 렌더링은 볼륨 렌더링 방법 중 가장 빠르지만 영상의 화질이 좋지 않다는 단점이 있다. 본 연구에서는 쉬어-왑 렌더링의 빠른 속도를 유지하며 화질을 개선하는 방법을 제안한다. 화질 개선의 첫 번째 방법은 중간영상(intermediate image) 기반의 수퍼샘플링(supersampling) 기법이다. 객체 좌표와 영상 좌표간의 변환을 효율적으로 수행하여 임의 비율의 영상 확대를 빠르게 수행한다. 화질 개선의 두 번째 방법은 선-적분(pre-integrated) 렌더링을 사용하는 것이다. 기존의 선-적분 기반 쉬어-왑 렌더링은 빈-공간 도약(empty space leaping)을 하지 못하여 속도가 저하되는 문제가 있지만, 본 연구에서 제안하는 겹친 최소-최대 지도(overlapped min-max map) 자료구조를 사용하면 빈-공간 도약을 수행하여 속도 문제를 해결한다. 본 제안 방법을 통해 광선추적법(ray-tracing) 수준의 고화질 렌더링 영상을 빠른 시간에 생성할 수 있다.

• 수산해양기술연구
• /
• 제41권2호
• /
• pp.122-128
• /
• 2005

The experiments were conducted to fine out the handling characteristics of the FMT(Frame Mideater Trawl) in the southern waters of Korea using a trawler "DONGBAEK" belongs to Yosu National University. The realtionship between the net depth D(m) and the warp length L(m) at the towing speeds of 2.5k't and 3.5k't werw as follows ; D(m) = 0.30L - 1.3(2.5k't), D(m) = 0.16L - 1.5(3.5k't). Therefore, the net depth was 3.0m deeper when the warp length was 10m longer at the towing speed of 2.5k't and was 1.6m deeper for 10m longer at the speed of 3.5k't, respectively. The sinking speed of FMT was 6.5m/min when the warp releasing speed was 24m/min at the towing speed of 2.5k't and was 3.8m/min for 25m/min at the towing speed of 3.5k't, respectively. The rising speed of FMT was 6.9m/min when the warp rewinding speed was 28m/min at the towing speed of 2.5k't and was 5.3m/min for 25m/min at the towing speed of 3.5k't, respectively. The mean elapsed time getting to the stable towing condition was 104sec at the towing speed of 2.5k't and was 105sec at the towing speed of 3.5k't, respectively, and there was no time difference for the towing speed variation. During the towing, the net depth was comparatively stable on the condition of no change for the warp length and the towing speed.

• 한국의류산업학회지
• /
• 제4권3호
• /
• pp.261-265
• /
• 2002

To propose a basic material that can improve the crumples in the knee area and can be applied as an element of garment design, the present study examined the elongation rates of the samples by differentiating the number of cutting lines according to the direction of the fabric, and then determined the puckering phenomenon by judging the conditions of the seams based on the looks of seam lines after bi-axil elongation. After the subjective evaluation on the knee areas of both the standard and modified trousers, the following conclusion was drawn : The elongation rates of the samples are: warp (3.98%)cross-legged (-0.2)>squatting down (-0.4); those in the modified trousers feel more comfortable when sitting on a chair (0.2)>cross-legged (0)>squatting down (-0.6). In the cross-legged posture, the modified trousers (0) has higher scores in the subjective evaluation than the standard ones (-0.2). The evaluation on the looks of needleworks in the samples with cutting lines along the direction of the fabric: weft2 (5.0)

• 한국수산과학회지
• /
• 제2권2호
• /
• pp.173-178
• /
• 1969

(1) 1968년 6월 18일부터 7월 16일 사이에 일본수산청 어업조사선 Kaiyo-Maru에 승선 New Zealand 근해에서 trawl 실험을 행하였다. (2) 대형선미 trawl에 있어 예강초와 양강직전의 warp 장력간의 차는 입강어의 다과와는 상관이 없는 것 같다.

• 디지털콘텐츠학회 논문지
• /
• 제18권4호
• /
• pp.739-745
• /
• 2017

본 논문에서는 GPU 병렬 처리 하드웨어 아키텍처 내 최소 물리적 스레드 실행 단위(warp) 내에서 shifted sort 기반 k개 최근접 이웃 검색 기법을 구현하는 방법을 논의하고 일반적으로 동일한 목적으로 널리 사용되는 GPU 기반 kd-tree 및 CPU 기반 ANN 라이브러리와 비교한 결과를 제시한다. 또한 많은 애플리케이션에서 k가 비교적 작은 값이 필요한 경우가 많다는 사실을 고려해서 k가 warp 내부에서 직접 처리 가능한 2, 4, 8, 16개일 때 최적화에 집중한다. 구현 세부에서는 사용한 CUB 공개 라이브러리의 루프 내 메모리 관리 방법, GPU 하드웨어 직접 명령 적용 방법 등의 최적화 방법을 논의한다. 실험 결과, 제안하는 방법은 기존의 GPU 기반 유사 방법에 비해 데이터 지점과 질의 지점의 개수가 각각 $2^{23}$개 일 때 16배 이상의 빠른 처리 속도를 보였으며 이러한 경향은 처리해야 할 데이터의 크기가 커지면 더욱 더 커지는 것으로 판단된다.

• 한국의류산업학회지
• /
• 제5권3호
• /
• pp.299-303
• /
• 2003

Some of historical textiles were analyzed to identify the imprinted textures on the metal remains of Haengyeup(a horse strap pendant) and Doja (a knife), which were excavated in the ruins of Hwangsung-dong, Kyungju city in the fifth century and textiles imprinted on the human bones that were excavated in the Pungnae 4th Area, Namyangju county in the sixteenth century. The results analyzed arc as follows ; It was confirmed that the imprinted textures of Haengyeup and Doja are white ramie since the structural characteristics of cellulosic bast fibers, partially projected long oval cross sections with large lumens and the imprinted textures of human bones are silk fabrics since the triangular cross sections of fibroin is showed. All of the textiles were designed in plain weaves. In the case of weaving yarns, the warp threads were thicker than the weft threads, that is, the imprinted textures of Haengyeup were measured by 1.35 mm for warp and 1.21 mm for weft, and the Doja by 1.16mm for warp and 1.11 mm for weft. In connection with the direction of the yarn twist, the Z-twist were observed in the imprinted textures of human bones, whereas it presented the S-twist in the case of Haengyeup and Doja. The warp yarns were mostly harder twisted than the weft yarns on the amounts of twist, that is, it was observed that the case of Haengyeup were amounted to 0.33 twists per centimeter for warp yarns and 0.25 twists per centimeter for weft yarns. Also it was showed 0.32 twists per centimeter for warp yarns and 0.26 twists per centimeter in the case of the textures of human bones. On the fabric counts, it was showed that the finer the yarns the higher the densities since it were $4.3{\times}5.1$ threads per sqaure centimeters and $7.6{\times}7.1$ threads per sqaure centimeters each in the case of Haengyeup and Doja, whereas it was $18.2{\times}33.7$ threads per sqaure centimeters in the case of the textures of human bones.