• 제목/요약/키워드: CIIR

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할로겐화 고무의 수가교에 관한 연구(II) (할로겐화 부틸고무의 수가교) (A Study on the Moisture-Cure of Halogenated Rubber(II) (Moisture-Cure of CIIR and BIIR))

  • 윤정식;유종선;백남철;민병권
    • Elastomers and Composites
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    • 제27권1호
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    • pp.20-26
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    • 1992
  • Reactions between chlorinated or brominated poly(isobutylene-isoprene) (CIIR and BIIR, respectively) and 3-mercaptopropyltrimethoxysilane(MPS) were kinetically studied by gas chromatography in solution state. CIIR and BIIR were mixed with MPS and dibutyltin dilaurate as catalyst on roll mill and then the compounds were cured in hot water or atmosphere. From the gas chromatography, reaction order, activation energy, and frequency factor were determined. Crosslinking density and physical properties of moisture-cured CIIR and BIIR were measured. CIIR and BIIR were effectively moisture-cured and physical properties of these rubbers were comparatively good.

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평면기반 컴퓨터 집적 영상 복원 기술의 신호모델을 이용한 3D 복원 영상 분석 (Analysis of 3D reconstructed images based on signal model of plane-based computational integral imaging reconstruction technique)

  • 신동학;유훈
    • 한국정보통신학회논문지
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    • 제13권1호
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    • pp.121-126
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    • 2009
  • 평면기반 컴퓨터 집적 영상 복원 (CIIR)기술은 3D 물체에 대한 깊이 영상복원이 가능한 기술이다. 그러나 복원되는 깊이에 따라 영상에 잡음이 발생하게 되어 해상도를 저하시키는 문제점이 있다. 본 논문에서는 이 문제점을 극복하기 위해서 CIIR 기술에 대한 신호 모델을 설명하고, 이를 통하여 CIIR 기술에 발생하는 잡음과 이를 보정하는 방법을 소개한다. 컴퓨터적 실험을 통하여 2D Gaussian 영상의 복원 영상에 대한 잡음 특성을 조사하고, 보정 과정을 통하여 고해상도의 영상을 얻을 수 있음을 보였다.

실리카-실란이 클로로부틸 방진고무 복합소재의 기계적 물성 증가에 미치는 영향 (Effects of Silica-Silane for CIIR Vibration Isolation Compound upon Increased Mechanical Properties)

  • 김성민;김광제
    • 폴리머
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    • 제39권1호
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    • pp.107-113
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    • 2015
  • 클로로부틸(CIIR) 방진고무 복합소재 내에서 실리카-실란이 기계적 물성과 점탄성에 미치는 영향을 평가하였다. 실리카-실란이 첨가된 경우, 방진고무의 핵심물성 중 하나인 인열강도는 13%, 파단 신장률은 14%씩 각각 증가하였다. 그 외 인장강도 및 경도 등은 비슷한 값을 보였다. 점탄성 관찰로부터 인열강도 및 파단 신장률의 증가는 실리카-실란의 첨가에 의한 복합소재 내 실리카와 클로로부틸간 3차원 사슬구조의 형성에 따른 것으로 판단되었다. 인열강도 및 파단 신장률의 향상에 관한 메커니즘을 논의하였다.

Neighboring Elemental Image Exemplar Based Inpainting for Computational Integral Imaging Reconstruction with Partial Occlusion

  • Ko, Bumseok;Lee, Byung-Gook;Lee, Sukho
    • Journal of the Optical Society of Korea
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    • 제19권4호
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    • pp.390-396
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    • 2015
  • We propose a partial occlusion removal method for computational integral imaging reconstruction (CIIR) based on the usage of the exemplar based inpainting technique. The proposed method is an improved version of the original linear inpainting based CIIR (LI-CIIR), which uses the inpainting technique to fill in the data missing region. The LI-CIIR shows good results for images which contain objects with smooth surfaces. However, if the object has a textured surface, the result of the LI-CIIR deteriorates, since the linear inpainting cannot recover the textured data in the data missing region well. In this work, we utilize the exemplar based inpainting to fill in the textured data in the data missing region. We call the proposed method the neighboring elemental image exemplar based inpainting (NEI-exemplar inpainting) method, since it uses sources from neighboring elemental images to fill in the data missing region. Furthermore, we also propose an automatic occluding region extraction method based on the use of the mutual constraint using depth estimation (MC-DE) and the level set based bimodal segmentation. Experimental results show the validity of the proposed system.

원형매핑 모델과 보간법을 복합 사용하는 컴퓨터 집적 영상 복원 기술에서 3D 영상의 해상도 개선 (Enhancement of 3D image resolution in computational integral imaging reconstruction by a combination of a round mapping model and interpolation methods)

  • 신동학;유훈
    • 한국정보통신학회논문지
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    • 제12권10호
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    • pp.1853-1859
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    • 2008
  • 본 논문에서는 컴퓨터 집적 영상 복원(CIIR) 기법 기반의 3D 패턴 인식 응용을 위해서 평 면 3D 복원 영상의 해상도를 향상시키는 새로운 방식을 제안한다. 제안하는 방식에서는 ClIR에서 각각의 요소 영상에 대해서 원형 매핑 모델과 보간법을 복합사용하여 확대 중첩을 통해 향상된 3D 영상을 복원한다. 제안하는 방식에 대해서 정확한 CIIR 방식의 객관적인 해석을 위해서 Gaussian 영상을 이용한 테스트 모델을 설명하고 제안하는 방식에 대해서 성능평가를 수행한다. 그리고 3차원 물체에 대한 컴퓨터 복원 실험을 수행하고 그 결과를 보고한다.

Amino Silane, Vinyl Silane, TESPD, ZS(TESPD/Zinc Complex) Effects on Carbon Black/Clay Filled Chlorobutyl Rubber(CIIR) Compounds Part I: Effects on Hard Clay/Carbon Black Filled Compounds

  • Kim, Kwang-Jea
    • Carbon letters
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    • 제10권2호
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    • pp.101-108
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    • 2009
  • Various silanes, amino silane, vinyl silane, TESPD, and ZS (TESPD/zinc soap complex), are added into chlorinated isobutylene-isoprene copolymer (CIIR)/hard clay/carbon black (CB) compound and they are investigated with respect to the vulcanization characteristics, the processability, and the mechanical properties. In hard clay/CB filled system, only ZS silane added compound shows both lower Mooney viscosity and extrusion torque while vinyl silane added compound showed only a lower extrusion torque. All the ZS added compounds showed the lowest viscosity among them. The silane added compounds showed an increased modulus. In 'fatigue to failure' count test, the ZS added compound showed superior counts compared to other silane (amino, vinyl, TESPD) added compounds. The mechanical properties were significantly increased when the S2 and ZS were added into CIIR/hard clay/CB compound. The ZS added compounds showed a significant improvement on elongation modulus.

Computational Integral Imaging Reconstruction of a Partially Occluded Three-Dimensional Object Using an Image Inpainting Technique

  • Lee, Byung-Gook;Ko, Bumseok;Lee, Sukho;Shin, Donghak
    • Journal of the Optical Society of Korea
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    • 제19권3호
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    • pp.248-254
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    • 2015
  • In this paper we propose an improved version of the computational integral imaging reconstruction (CIIR) for visualizing a partially occluded object by utilizing an image inpainting technique. In the proposed method the elemental images for a partially occluded three-dimensional (3D) object are recorded through the integral imaging pickup process. Next, the depth of occlusion within the elemental images is estimated using two different CIIR methods, and the weight mask pattern for occlusion is generated. After that, we apply our image inpainting technique to the recorded elemental images to fill in the occluding area with reliable data, using information from neighboring pixels. Finally, the inpainted elemental images for the occluded region are reconstructed using the CIIR process. To verify the validity of the proposed system, we carry out preliminary experiments in which faces are the objects. The experimental results reveal that the proposed system can dramatically improve the quality of a reconstructed CIIR image.

Improvement of Abrasion Resistance and Friction of Rubber Blend Composition

  • Lee, Jong-Hwan;Lee, Jieun;Han, Tak Jin;Jeong, Hye Min
    • Elastomers and Composites
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    • 제55권3호
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    • pp.161-166
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    • 2020
  • On the basis of the use of shoes, the outsole, which is mainly made of rubber, has various characteristics. The most important of these characteristics is abrasion resistance and friction. Generally, the abrasion resistance can be improved by adding more reinforcing filler such as silica to the rubber; however, the friction force drops. Owing to these problems, rubber having excellent abrasion resistance and rubber having excellent frictional force are blended. In this study, various characteristics, including wear resistance and friction, were evaluated by blending NBR/SBR or NBR/BR mixture with high wear resistance and CIIR with high friction. The CIIR was increased up to 60 phr, whereas the friction wear characteristics were rapidly changed in the NBR/CIIR blend ratio from 75:15 to 60:30.

크기가변 확대 기법 기반의 컴퓨터적 집적 영상 방법을 이용한 3D 영상의 해상도 개선 (Resolution enhancement of 3D images using computational integral imaging reconstruction method based on scale-variant magnification)

  • 신동학;유훈
    • 한국정보통신학회논문지
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    • 제12권12호
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    • pp.2271-2276
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    • 2008
  • 본 논문에서는 3D 영상의 해상도 개선을 위한 크기가변 확대 기법 기반의 컴퓨터적 집적 영상 재생 방법을 제안한다. 먼저 컴퓨터적 집적 영상 재생 방법에서 요소 영상 사이의 간섭 문제를 설명한다. 큰 확대개수는 요소 영상의 확대 중첩 과정에서 큰 간섭을 야기하여 재생 3D 영상의 해상도를 저하시킨다. 이 간섭 문제를 극복하기 위해서 최소 확대 계수를 계산하는 방법을 제안한다. 새로운 최소 확대 계수는 해상도가 향상된 3D 영상을 제공하며, 제안하는 방법은 기존의 방법보다 계산량이 작다. 제안하는 방법의 유용함을 보이기 위해서 컴퓨터 복원 실험을 수행하고 그 결과를 보고한다.

Viewing Quality Enhancement of 3D Reconstructed Images in Computational Integral Imaging Reconstruction by use of Averaging Method

  • Li, Gen;Hwang, Dong-Choon;Lee, Keong-Jin;Kim, Eun-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.757-760
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    • 2008
  • In this paper, an improved computational integral imaging reconstruction (CIIR) is proposed. The proposed method can highly enhance the viewing quality of reconstructed image. To show the feasibility of proposed method, some experiments are performed and the results are compared and discussed with those of the conventional method.

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