• 한국복합재료학회:학술대회논문집
• /
• 한국복합재료학회 2005년도 춘계학술발표대회 논문집
• /
• pp.125-129
• /
• 2005

A micromechanical model for predicting the elastic constants of stitched multi-axial warp knitted (MWK) composite is developed. The averaging method is used to obtain effective properties of stitched MWK fabric composites. In the analysis, a representative volume of the MWK fabric composite is identified. The geometric limitations, effects of stitching yarns and design parameters of MWK fabric composites are considered in the model. Then, the elastic properties of stitched MWK fabric composites are predicted. Finally, the predicted elastic constants are validated by comparison with experimental data. The predicted results are in fair agreement with the experimental results.

• International journal of advanced smart convergence
• /
• 제9권3호
• /
• pp.253-259
• /
• 2020

Most of today's large-scale cloud systems and enterprise data centers are distributing resources to improve scalability and resource utilization. NVMe-over-Fabric protocol allows submitting NVMe commands to a remote NVMe SSD through RDMA (Remote Direct Memory Access) network. It is attracting attention recently because it is possible to construct a disaggregation storage system with low latency through the protocol. However, the current I/O stack of NVMe-over-Fabric has an inefficient structure for maintaining compatibility with the traditional I/O stack. Therefore, in this paper, we propose a new mechanism to reduce I/O latency and CPU overhead by modifying I/O path of NVMe-over-Fabric to pass through legacy block layer. According to the performance evaluation results, the proposed mechanism is able to reduce the I/O latency and CPU overhead by up to 22% and 24% compared to the existing NVMe-over-Fabrics protocol, respectively.

• 한국의류산업학회지
• /
• 제10권6호
• /
• pp.822-826
• /
• 2008

The data for application of mordanting is shown in this experiment by researching dying properties of iron-dye process and concentration changes using persimmon. The strength of persimmon-dying fabrics was controlled by diluting persimmon dye with water and iron mordanting showed the possibility of textile design. The experiments were performed with various conditions processed with iron mordanting liquid by adding water to persimmon-dying liquid and drying well. The most dark color of fabric is observed with the pure persimmon dying without adding water. As the adding water is increased, the color of the fabric is getting lighter with the amount of adding water. After process of iron mordanting, dark color of the fabric turns into dark grey and light color turns into light grey. The possibility of persimmon dying with fabric can be applied in the design of textile with deepened color.

• 대한가정학회지
• /
• 제31권1호
• /
• pp.193-210
• /
• 1993

The purpose of this study was to investigate the effect of age, physical type and job on preference for color and fabric motifs in men's clothing design. Color preference measures consisted of clothing styles painted in CAD. Preference for fabric motifs was assesed by stripe fabrics in size, width and strength. All of the preference measures were devised specifically for this study. Furthermore, items on Hight and Weight for physical type, age and job of subjects were included I the questionnaire. Data were obtained by self-administered questionnaires form 243 men (25-54 years old) in Seoul. Analysis was by chi-square (X2), frequency, and percentage. The results obtained in this study were as follows : 1. Color preference was not affected by age and physical type, Job was related to coordinate color of men's clothing. 2. Preference for width of striped motifs was affected by age and job. 3. Preference for strength of fabric motifs in men's jacket was affected by physical type.

• Journal of information and communication convergence engineering
• /
• 제5권1호
• /
• pp.23-28
• /
• 2007

In this paper, we propose ATM switch structure including AAL type 2 switch which can efficiently transmit low-bit rate data, even if the network has many endpoints. We simulate the architecture of ATM switch fabric that is modeled in computer program and analyze the performance according to offered loads. ATM switch proposed in this paper can support cell switching for all types of AAL cells which consist of AAL type 1, AAL type 2, AAL type 3/4, and AAL type 5 cells. We propose two switch fabric methods; One supports the AAL type 2 cell processing per input port, the other global AAL type 2 cell processing for every input port. The simulation results show that the latter is superior to the former. But the former has a strong point for easy implementation and extensibility. The proposed ATM switch fabric architecture is applicable to mobile communication, narrow band services over ATM network.

• 감성과학
• /
• 제13권1호
• /
• pp.279-284
• /
• 2010

본 연구는 직물구조 디자인의 데이터 베이스에 대한 기초 연구를 수행한다. 이를 위해서 소모직물과 면직물들의 직물밀도계수가 월츠 교수와 피카놀 회사에서 제안된 커버팩터와 관련시켜 분석되고 토의된다. 또한 소모직물과 면직물의 직물밀도계수와 커버팩터와의 관계가 직물조직과 실의 번수에 따라 분석 토의된다. 끝으로 이들 천연직물들의 염색 가공공정에서의 공정수축률이 직물밀도계수와 함께 직물구조 디자인의 데이터베이스 시스템의 예비 연구로서 분석 토의된다. 그 결과는 소모직물과 면직물의 밀도계수, K 값은 600에서 1000까지 분포하였으며 이들 직물들의 직물밀도계수는 0.4에서 0.8 그리고 0.2에서 1.0의 범위에서 각각 분포하였다. 모직물의 가공축은 2%에서 10% 그리고 면직물의 가공축은 2%에서 20%까지 분포하였다. 그리고 모직물과 면직물의 직물밀도계수는 직물구조디자인에 대한 데이터 베이스의 개념으로서 직기와 직물구조 그리고 직축과 가공축에 따라서 분포됨을 보여주었다.

• 한국의류학회지
• /
• 제22권4호
• /
• pp.493-502
• /
• 1998

The purpose of this study was to compare consumers' evaluation, evaluation criteria and preference factors, complaint factors on domestic brand apparel with consumers' responses on foreign brand apparel. 498 subjects were gathered through convenience sampling method and, for data analysis, mean, t-test, ANOVA, Duncan test, Factor Analysis were conducted. The results are as follows; 1. Among the purchasing groups of domestic/foreign brand apparel, there were significant differences in apparel evaluation according to fabric, style, sewing, versatility, match, washability and color. 2. Among the purchasing groups of domestic/foreign brand apparel, there were significant differences in apparel evaluation criteria according to price, match, brand name, washability. 3. Purchasers of domestic brand apparel preferred soft and light fabric, fabric of good tactility, simple and sophisticated style whereas purchasers of foreign brand apparel preferred soft and light fabric, fabric of high quality, elegant and sophisticated style. On apparel color preference, there were significant differences among the purchasing groups of domestic/foreign brand apparel. 4. The differences in complaint factors of apparel among the purchasing groups of domestic/foreign brand apparel were due to factors such as high quality and variety of fabrics, colors, items, styles.

• 한국의류학회지
• /
• 제37권2호
• /
• pp.151-158
• /
• 2013

This study presents basic knitted fabric data on the use of ply yarn with rayon yarn and eco-friendly/high-valued Hanji yarn. Physical properties (gauge, thickness, burst strength, air permeability, stiffness, Qmax, dimensional stability and surface image) of Hanji 100%, rayon 100% and Hanji/rayon 50:50 knitted fabrics are investigated. The results are as follows. Course direction of gauge decrease in the following order: rayon 100% > Hanji/rayon 50/50 > Hanji 100%. In addition wale direction of gauge decrease in the following order: Hanji 100% > Hanji/rayon 50/50 > rayon 50/50. Thickness and air permeability decrease in the following order: Hanji 100% > Hanji/rayon 50/50 > rayon 100%. Burst strength decrease in the following order: rayon 100% > Hanji 100% > Hanji/rayon 50/50. Stiffness and Qmax decrease in the following order: rayon 100% > Hanji/rayon 50/50 > Hanji 100%. Laundry for dimensional stability is knitted fabric with Hanji/rayon 50/50 than rayon 100% and Hanji 100% improved using neutral detergent and stable at $20^{\circ}C$. From surface image observation, the cracks of Hanji 100% and fibrils of rayon 100% decrease when using knitted fabric with Hanji/rayon 50/50.

• The International Journal of Costume Culture
• /
• 제4권3호
• /
• pp.241-248
• /
• 2001

Re water resistance of shell fabrics intended for we in outdoor apparel was measured using three different standard test methods, ASTM D 751, hydrostatic resistance, procedure A(Mullen test -- with and without a fabric support) and Procedure B (Hydrostatic head test). A database of information on their water resistance performance was created. The data collected with different methods were correlated and the advantages and disadvantages of each method were compared. The Mullen test with a support appears to give higher and more favorable water resistance values on shell fabrics preventing fabric rupture during the test. The hydrostatic head test gave lower hydrostatic pressure values than those measured on the two Mullen tests. The Mullen test is recommended for testing the water resistance of fabrics that high a relatively high water resistance because the Mullen tester applies a wide range of pressure. The hydrostatic head test is recommended for testing the fabrics that have relatively low water resistance. The area of the fabric sample that is in contact with the water is smaller in the Mullen test, so higher pressure levels can be reached and more samples should probably be tested to get a representative value for each fabric types. Furthermore, the hydrostatic head test was deemed more repeatable than the Mullen tests in his study.

• 한국게임학회 논문지
• /
• 제10권4호
• /
• pp.81-90
• /
• 2010

본 논문에서는 측정된 양방향 반사 분포 함수(BRDF)와 같은 데이터 없이 사실적인 직물 표면 렌더링이 가능한 효율적인 방법을 제안한다. 제안된 기법은 광선 추적 기반의 오프라인 렌더러와 게임과 같은 실시간 응용에 모두 적용할 수 있다. 제안된 기법은 교호적(alternating) 이방성 반사와 변형된 미세면 분포 함수를 이용하여 직조 표면을 표현한다. 실에 대한 절차적 모델링은 직물의 표면을 효과적이며 효율적으로 표현할 수 있게 한다. 실험결과는 제안된 기법을 통해 상호작용적 응용에서도 다양한 직조물 표면을 사실적으로 렌더링할 수 있음을 보이고 있다.