• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 추계학술대회 논문집
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• pp.369-372
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• 2005

A study on the microstructure, the texture and the formability of the samples after ECAPed and subsequent heat-treated AA 1050 aluminum alloy sheet have been carried out. The specimens after the ECAP showed a very fine grain size, a decrease of <100> // ND. The <110>// ND textures appears in the specimens after the ECAP and subsequent heat-treatment at $400^{\circ}C$ for 1 hour. One of the most important properties in sheet metals is formability. The r-value or plastic strain ratio has was as a parameter that expressed the formability of sheet metals. The change of the plastic Strain ratios after the ECAP and subsequent heat-treatment conditions were investigated and it was found that they were two times higher than those of the initial Al sheets. This could be attributed to the formation above texture components through the ECAP and subsequent heat-treatment of AA 1050 Aluminum alloy sheet.

• 자연과학논문집
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• 제7권
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• pp.67-73
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• 1995

본 논문에서는 인간시각 시스템의 특성을 이용하여 세그멘테이션을 행하는 새로운 텍스처 세그멘테이션 영상코딩 기술을 제안한다. 제안된 방법은 영상을 HVS가 인지한 러프니스 정도에 관하여 영상을 텍스처와 같은 성질의 영역으로 세그멘테이션하는 방법론을 제안하여 상 세그멘트를 갖는 세그멘테이션 영상코딩기술의 문제점을 해결한다. 세그멘테이션은 텍스처 영역을 3 가지의 다른 텍스처 크래스(인간이 인지한 상 인테셔티, 부드러운 텍스처 및 거칠은 텍스처)로 구분하기 위해서 프락탈 디멘션을 임계하여 얻는다. 프락탈 디멘션을 근사하기 위한 적당한 브락 크기를 결정하는 것이 중요하다. 좋은 화질을 갖는 재생 영상은 여러 종류의 영상에 대해서 약 0.1에서 0.25 비트/픽셀에서 얻는다.

• 한국분말재료학회지
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• 제10권4호
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• pp.241-248
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• 2003

Biaxially textured Ni tapes were fabricated by a cold working and recrystallization heat treatment processes from powder compact rods. The processing parameters associated with the cube texture formation in Ni tapes were systematically investigated by using X-ray diffraction and pole-figure analysis. The Ni powder used in this study was 5 $\mu$m in size and 99.99% in purity. To find the optimum sintering temperature, tensile tests were performed for Ni rods sintered at various temperatures. The Ni rods sintered at 100$0^{\circ}C$ showed poor elongation and low fracture strength, while the Wi rods sintered above 100$0^{\circ}C$ revealed good mechanical properties. The higher elongation and fracture strength of the Ni rods sintered at higher temperatures than 100$0^{\circ}C$ are attributed to the full densification of the sintered rods. The sintered Ni rods were cold-rolled with 5% reduction to the final thickness of 100 $\mu$m and then annealed for development of rube texture in rolled Ni tapes. The annealed Ni tapes depicted strong cube texture with FWHM(full-width at half-maximum) of in-plane and out-of-plane in the range of 8$^{\circ}$ to 10$^{\circ}$. The NiO deposited on the Ni tapes by MOCVD process showed good epitaxy with FWHM=10$^{\circ}$, which indicates that the Ni tapes can be used as a substrate for YBCO coated conductors.

• 한국멀티미디어학회논문지
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• 제22권7호
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• pp.790-803
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• 2019

The effects of different heat treatments on the sensory characteristics of abalones are studied in this study. In this paper, the sensory evaluation of abalone samples under different heat treatment conditions is carried out, and the evaluation results are analyzed. The three-dimensional (3D) scanning and reverse engineering are used in tooth modeling of the sensory evaluation of abalone samples under different heat treatment conditions. Besides, the chewing movement models are simplified into three modes, including the cutting mode, compressing mode and grinding mode, which are simulated using finite element simulation. The elastic modulus of the abalone samples is obtained through the compression testing using a texture analyzer to distinguish their material properties under different heat treatments and to obtain simulated mechanical parameters. Finally, taking the mechanical parameters of the finite element simulation of abalone chewing as input and sensory evaluation parameters as the output, BP neural network is established in which the sensory texture evaluation model of abalone samples is obtained. Through verification, the neural network prediction model can meet the requirements of food texture evaluation, with an average error of 9.12%.

• 대한전자공학회논문지
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• 제26권7호
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• pp.157-165
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• 1989

무늬로 부터의 3차원 정보의 복구에 있어서, 투영의 왜곡효과는 왜곡된 무늬로 부터 구별되어야 한다. 그래서 본 논문에서는 가우스 구상의 보이는 면, 즉 반구상에서 무늬의 국소 해석을 통하여 면방향을 구하는 근사화된 최대유사 추정법을 제시한다. 정사영과 원을 영상시스템과 무늬소로 가정하고 원의 호길이에 일정하게 존재하는 법선방향의 정사영을 통한 법선 분포의 변화로 부터 면방향을 구한다. 구해진 면의 방향은 그래디언트 공간상의 한점으로 표시한 슬랜트와 틸트로 나타낸다. 또 구해진 면방향은 바늘지도로 나타낸다. 입력 데이터로는 임의로 만든 제주도 지도와 원무늬를 사용하여 알고리듬을 적용하였다.

• 한국의류학회지
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• 제27권11호
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• pp.1318-1329
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• 2003

The purpose of this study was to examine the effects of the structural characteristics of men's suit fabrics on the texture image and the preference, and to analyze the relationship between the preference and the practical sales ratio. In addition, the texture images and the preference of fabric and jackets made of the same fabrics were compared. As specimen, jackets for men's suit of 2002' S/S and their fabrics were collected. Questionnaires composed of 22 sensibility related and 21 fabric image related adjectives were developed. For the subjective evaluation of the texture image, both jackets and fabric samples were tested. Tests were performed with 100 female subjects in clothing department and apparel industry. For the objective evaluation, structural characteristics such as fiber contents, yarn twist, fabric count, thickness and weight were analyzed. Total Hand Value were calculated from mechanical properties determined by the KES-FB system. Factor analysis showed sensibilities were classified into 6 categories; "surface roughness", "weight", "density", "stiffness", "elasticity" and "wetness". Fabric images were classified into 4 categories; "classic", "original", "practical", and "stuffy". Depending on the method to show the specimen to the subjects, whether it is suit or fabric, statistically significant differences were observed with a number of adjectives for sensibilities and fabric images. The results of THV of KES did not agree with the preference of subjects, which suggests that we should be careful when using the KES system, which was developed for Japanese people. Price was considered to be another factor besides the texture image that influenced on purchase.

• 한국식품조리과학회지
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• 제12권2호
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• pp.207-213
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• 1996

옥수수빵(CON)과 그 구성 성분중 옥수수 전분을 Amylomaize Vll starch로 대체한 제품(AMZ)을 제조하였다 또한 AMZ의 구성 성분중 지방의 일부를 RS 로 대체한 제품(지방의 15%대체시 RSl5, 30%대체 RS30)을 제조하여 총 네 가지 제품에 있어서 품질 특성을 살펴본 결과는 다음과 같다. 1. Sievert and Pomeranz의 방법에 따라 열처리-냉각 과정을 3번 반복하여 제조한 시료에서 분리된 RS의 수율은 28.96%였다. 2.옥수수빵의 텍스쳐 특성 표현어를 Szczesniak의 방법에 따라 분류한 결과 가장 많이 언급된 항목은 시료의 수분 함량에 관련된 촉촉하다였으며 깨짐성 및 검성에 관련된 표현어로서 푸석푸석하다, 부슬부슬하다 및 입자 크기와 관련된 용어로서 부드럽다, 꺼끌꺼 끌하다, 모래같다 등이었다 3. 관능검사 결과 기공의 크기는 지방을 RS로 대체 한 경우 유의적으로 증가하였고 CON에 비해 AMZ, RSl5및 RS30의 견고성이 유의적으로 증가하고 탄성은 유의적으로 감소되는 것을 알 수 있었다. 4. Texture analyser를 이용하여 deformation 30％로 기계적 texture를 관찰한 결과 견고성은 시간이 경과함에 따라 유의적으로 차이가 없거나 증가하는 경향을 보였으며 응집성은 변화가 없거나 감소하였고 탄성은 CON이 AMZ, RSl5 및 RS3O과 비교하여 항상유의적으로 높은 값을 보여 관능검사 결과와 일치하였다. 5. 50% 변형시킨 경우에도 30% 변형시킨 경우와 비슷한 경향을 보였으며 특히 지방의 30%를 RS로 치환했을 경우 물성에 유의적인 변화를 가져온다는 것을 알 수 있었다.

• Journal of Yeungnam Medical Science
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• 제39권1호
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• pp.24-30
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• 2022

Background: Texture analysis has been used as a method for quantifying image properties based on textural features. The aim of the present study was to evaluate the usefulness of magnetic resonance imaging (MRI) texture analysis for the evaluation of viable ovarian tissue on the perfusion map of ovarian endometriosis. Methods: To generate a normalized perfusion map, subtracted T1-weighted imaging (T1WI), T1WI and contrast-enhanced T1W1 with sequences were performed using the same parameters in 25 patients with surgically confirmed ovarian endometriosis. Integrated density is defined as the sum of the values of the pixels in the image or selection. We investigated the parameters for texture analysis in ovarian endometriosis, including angular second moment (ASM), contrast, correlation, inverse difference moment (IDM), and entropy, which is equivalent to the product of area and mean gray value. Results: The perfusion ratio and integrated density of normal ovary were 0.52±0.05 and 238.72±136.21, respectively. Compared with the normal ovary, the affected ovary showed significant differences in total size (p<0.001), fractional area ratio (p<0.001), and perfusion ratio (p=0.010) but no significant differences in perfused tissue area (p=0.158) and integrated density (p=0.112). In comparison of parameters for texture analysis between the ovary with endometriosis and the contralateral normal ovary, ASM (p=0.004), contrast (p=0.002), IDM (p<0.001), and entropy (p=0.028) showed significant differences. A linear regression analysis revealed that fractional area had significant correlations with ASM (r²=0.211), IDM (r²=0.332), and entropy (r²=0.289). Conclusion: MRI texture analysis could be useful for the evaluation of viable ovarian tissues in patients with ovarian endometriosis.

• Nuclear Engineering and Technology
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• 제43권1호
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• pp.19-24
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• 2011

These experimental studies are carried out to build a database for analyzing fuel performance in nuclear power plants. In particular, this study focuses on the mechanical and irradiation properties of three kinds of zirconium alloy (Alloy A, Alloy B and Alloy C) irradiated in the HANARO (High-flux Advanced Neutron Application Reactor), one of the leading multipurpose research reactors in the world. Yield strength and ultimate tensile strength were measured to determine the mechanical properties before and after irradiation, while irradiation growth was measured for the irradiation properties. The samples for irradiation testing are classified by texture. For the irradiation condition, all samples were wrapped into the capsule (07M-13N) and irradiated in the HANARO for about 100 days (E > 1.0 MeV, $1.1{\times}10^{21}\;n/cm^2$). These tests and results indicate that the mechanical properties of zirconium alloys are similar whether unirradiated or irradiated. Alloy B has shown the highest yield strength and tensile strength properties compared to other alloys in irradiated condition. Even though each of the zirconium alloys has a different alloying content, this content does not seem to affect the mechanical properties under an unirradiated condition and low fluence. And all the alloys have shown the tendency to increase in yield strength and ultimate tensile strength. Transverse specimens of each of the zirconium alloys have a slightly lower irradiation growth tendency than longitudinal specimens. However, for clear analysis of texture effects, further testing under higher irradiation conditions is needed.

• 한국식품조리과학회지
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• 제33권2호
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• pp.209-217
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• 2017

Purpose: The aim of this study was to compare the cooking properties of Bodeurami and Ilmi to promote consumption of rice. Methods: The properties of Bodeurami and Ilmi such as proximate composition, Hunter's color value, water absorption rate, and cooking properties as well as Hunter's color value, texture properties, and sensory evaluation of cooked rice were analyzed. Results: Crude protein, crude fat, and crude ash contents of Bodeurami and Ilmi were higher in brown rice than in white rice. Regardless of rice cultivars, L-value was lower, whereas a and b-values were higher in brown rice than in white rice. The water absorption rate of rice grains was higher in white rice than in brown rice and increased rapidly to 75 min for white rice and 4 hr for brown rice. Cooking properties, water absorption, and expansibility of white rice were higher than those of brown rice, and there were significant differences between Bodeurami and Ilmi. Immediately after cooking and after storage at warm ($70^{\circ}C$) and room temperatures ($25^{\circ}C$), hardness of cooked rice increased after storage, but was not significantly different between Bodeurami white rice and Ilmi brown rice. The sensory evaluation shows that Bodeurami brown rice scored the highest for taste, texture and overall preference. Conclusion: Thus, the results of this study shows that Bodeurami brown rice is characterized by high cooking quality without any mixed white rice, and Bodeurami white rice could be used for the rice processing industry as well as cooked rice.