• Title, Summary, Keyword: hand value

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A Study on the Mechanical Properties and the Handle of Fabrics -On the blend ratio and weight of summer suits- (직물의 역학적 성질과 Handle에 관한 연구 -하복지의 혼방률과 중량을 중심으로一)

  • Kim Duk Ly;Park Jeang Whan
    • Journal of the Korean Society of Clothing and Textiles
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    • v.8 no.2
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    • pp.47-57
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    • 1984
  • Effect on the hand value and mechanical properties of blend ratio and weight had been investigated Oil summer suits for men. Relation between the mechanical properties and the deformation in behavior was also studied. The mechanical properties which influence the hand values and total hand value had been discussed and the relation between mechanical properties, hand values and fabric count had, too. As result, the following conclusions had been obtained. 1) The values of tensile properties increased with the increase of blend ratio of wool. The values of surface properties increased according to the increase of blend ratio of polyester. 2HB(bending properties) of polyester/wool blend showed higher value than that of $100\%$ wool, but there was no change in the shearing properties according to the blend ratio. The values of stiffness, crispness and anti-drape stiffness of blend fabric showed higher values than those of $100\%$ wool fabric. The value of fullness (including softness) of blend fabric showed lower value than that of $100\%$ wool fabric. 2) The correlation between hand values and mechanical properties showed following order. in stiffness : bending properties>surface properties in crispness: surface properties>bending properties in anti-drape stiffness: bending properties>surface properties>shearing properties.

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Effect of Chitosan Treatment on the Hand of Nonwoven Fabric (키토산 처리에 의한 부직포의 태 변화)

  • 신윤숙;손경희
    • Korean Journal of Human Ecology
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    • v.1 no.2
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    • pp.119-128
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    • 1998
  • Nonwoven fabrics for diaper coverstock were treated with chitosan solution by pad-dry method. Two chitosans of different molecular weigh(Mw) with similar degree of deacetylation(DDA) were used: Mw 1,800(chitosan oligomer, DDA 84%). Effect of chitosan treatment on the mechanical properties was investigated using KES-FB system. Primary hand values were calculated from mechanical properties using the same equation as the men's suiting equation with minor modification, and total hand values were calculated using new KN-5LNW equation for nonwoven fabrics developed by Kawabata et al. Increase in chitosan treatment concentration increased B, 2HB, WT, LT and RC, and decreased WC continuously. Chitosan treatment affected other mechanical properties regardless of molecular weight. Considering primary hand values obtained from mechanical properties, it was found that chitosan of Mw 180,000 and chitosan oligomer provided softer, smoother, and more bulky at below 0.05% and above 0.5% treatment concentration respectively. Samples treated with 1.0% chitosan oligomer solution, and 0.01% chitosan solution of Mw 180,000 showed the best total hand values. (Korean J Human Ecology 1(2):119∼128, 1998)

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HSV Color Model based Hand Contour Detector Robust to Noise (노이즈에 강인한 HSV 색상 모델 기반 손 윤곽 검출 시스템)

  • Chae, Soohwan;Jun, Kyungkoo
    • Journal of Korea Multimedia Society
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    • v.18 no.10
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    • pp.1149-1156
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    • 2015
  • This paper proposes the hand contour detector which is robust to noises. Existing methods reduce noises by applying morphology to extracted edges, detect finger tips by using the center of hands, or exploit the intersection of curves from hand area candidates based on J-value segmentation(JSEG). However, these approaches are so vulnerable to noises that are prone to detect non-hand parts. We propose the noise tolerant hand contour detection method in which non-skin area noises are removed by applying skin area detection, contour detection, and a threshold value. By using the implemented system, we observed that the system was successfully able to detect hand contours.

Mean Hand Grip Strength and Cut-off Value for Sarcopenia in Korean Adults Using KNHANES VI

  • Yoo, Jun-Il;Choi, Hana;Ha, Yong-Chan
    • Journal of Korean Medical Science
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    • v.32 no.5
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    • pp.868-872
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    • 2017
  • The purpose of this study was to report age- and gender-specific distribution of the hand grip strength (HGS) using data from the Korea National Health and Nutrition Examination Survey (KNHANES) VI-3 (2015) survey and determine cut-off values for low muscle strength of HGS of Koreans. Of a total of 7,380 participants, 4,553 were subjected to measurements of HGS, including 1,997 men and 2,556 women with a mean age of 49.3 years (range, 19-80 years). The mean ages of men and women were 49.0 and 49.5 years, respectively. HGS was measured using a digital hand dynamometer. It was defined as maximal measured grip strength of the dominant hand. The cut-off value for low muscle strength was defined as the lower 20th percentile of HGS of the study population. Maximum grip strength of men was significantly higher than that of women (40.2 kg in men vs. 24.2 kg in women, P < 0.001). The mean HGS was increased from the age of 19 to 39 years. It was peaked in the age of 35 to 39 years range for both men and women. It was then decreased after 39 years. The cut-off values of HGS in male and female elderly healthy populations were 28.6 and 16.4 kg, respectively. These data might be used as reference values when evaluating sarcopenia and assessing hand injuries.

The Changes of Appearance Properties of Bamboo Knitted Fabric After Loess Dyeing

  • Jee, Ju-Won
    • International Journal of Human Ecology
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    • v.8 no.2
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    • pp.99-106
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    • 2007
  • In this study, the mechanical properties related to the fabric appearance of well being functional bamboo knitted fabric before and after loess dyeing were evaluated. The mechanical properties of fabrics were measured by KES-F system, that is, shape retention, draping, wrinkle recovery, compression property, and surface properties, and total hand value of three types of knitted fabric, 100% bamboo, 100% cotton, and bamboo / cotton blend (60 / 40) were evaluated before and after loess dyeing. As a result, it was found that appearance density, shape retention, and drape coefficient of cotton knitted fabric were greater than those of bamboo knitted fabric. After loess dyeing, shape retention and drape coefficient, wrinkle recovery of bamboo knitted fabric improved and WC/C and MMD/SMD decreased. According to THV, the hand of bamboo/cotton blend knit is the best among three samples by compensation the weak properties of the two fiber. Therefore, loess dyeing seemed to be a good method for improving shape retention and hand value of 100% bamboo and bamboo blended fabric.

Uniqueness and Value-sharing of Entire Functions

  • Li, Xiaojuan;Meng, Chao
    • Kyungpook Mathematical Journal
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    • v.49 no.4
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    • pp.675-682
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    • 2009
  • In this paper, we study the uniqueness problems on entire functions sharing one value. We improve and generalize some previous results of Zhang and Lin [11]. On the one hand, we consider the case for some more general differential polynomials $[f^nP(f)]^{(k)}$ where $P({\omega})$ is a polynomial; on the other hand, we relax the nature of sharing value from CM to IM.

Development of New Comfortable Materials Based on Cellulose Fiber (I) -Effect of Linen-like Finishing on Hand Value and Heat Transport Properties- (셀룰로스 섬유를 이용한 감성쾌적소재 개발 (I) -의마가공이 직물의 태 및 열전달 특성에 미치는 영향-)

  • Jeong, Won-Young;An, Seung-Kook;Lee, Yang-Hun
    • Textile Science and Engineering
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    • v.47 no.3
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    • pp.191-197
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    • 2010
  • Linen fabric is one of the most traditional fabrics for summer clothing because of its high permeability and cool feeling. However, it has some demerits such as low dyeability, poor dimensional stability, and high cost, which has encouraged the development of linen-like finishing based on cellulose materials. In this research, we evaluated the linen-like effects of cotton fabric on the objective hand value and heat transport properties with various concentrations of NMMO aqueous solution. Solvent bonding of cotton fabric through the treatment with NMMO aqueous solution was observed above 30% concentration. Primary hand values were calculated by KN-101-SUMMER equation for translating fabric mechanical parameters into hand values for summer suit fabrics. Stiffness(KOSHI) and anti-drape stiffness (HARI) remarkably increased with the concentrations of NMMO aqueous solution. It will provide a merit for summer clothing, which does not clinging to the skin during sweating.

Vibration Damping Characteristics of the Powered Hand Tools on Hand-Arm System (손-팔 시스템에 전달되는 전동수공구의 진동감쇠 특성)

  • 장규표;김길주;이동춘
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.22 no.52
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    • pp.43-52
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    • 1999
  • In this study, the vibration damping characteristics of the powered hand tools transmitted in hand-arm system were examined and compared. The types of powered tools for the experiment are general typed drill, impact drill, grinder, and wire brush. To analyze the characteristics of vibration damping, the magnitude of acceleration of vibration on X, Y, and Z direction at tool, hand, wrist, and the joint between forearm and upper arm were measured respectively. The results indicated that impact drill generated the highest value of acceleration of vibration among the four types of tools used in the experiments. The highest value of the amount of acceleration of vibration was found in the direction of Y. And the amount of acceleration of vibration was significantly affected by the type of tool, type of work, and pushing forces. As become the more distant from the tool, the smaller the amount of acceleration of vibration. Also, the bigger the pushing force at the tool, the higher the acceleration of vibration.

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A Study on the Hand Values of Hanji Paper Yarn Fabric Treated with Persimmon Juice (감즙 처리된 한지사 소재의 Hand Value에 관한 연구)

  • Choi, Kyeong-Eun;Rhie, Jeon-Sook;Jung, Woo-Young
    • Journal of the Korea Fashion and Costume Design Association
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    • v.12 no.4
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    • pp.197-206
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    • 2010
  • The purpose of this study is to dye hanji/cotton fabrics using persimmon juice and to investigate the change in the hand fabrics. Using the Kawabata Evaluation System, we have examined the changes in the physical properties, primary hand value and total hand value. The dynamic characteristics of hanji/cotton fabrics have been explored by tensile, shear, bending, compression, surface properties, thickness and weight. As a result, it can be seen that the linearity of load-extension and tensile resilience are increased with the increase of the concentration and dyeing times of persimmon juice and tensile energy is decreased in the same condition. These behaviors are shown in the compression properties. Although the mechanism of persimmon juice dyeing has been widely discussed, it means that the fabrics dyed with persimmon juice become stiffened and the elasticity is increased with the introduction of persimmon on the fabrics studied. Bending rigidity and hysteresis of the bending moment are increased with the increase of the concentration and dyeing times of persimmon juice. Also, Geometrical roughness, expressed in SMD is increased with increasing the concentration and dyeing times of persimmon juice, compared with as-received. It indicates that these results are due to the geometric structure of hanji yarn and the introduction of persimmon juice on the fabrics studied. The fullness and softness with the soft feeing are increased a little due to the tannin component of persimmon juice introduced on the fiber surface.

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Influence of Construction Combination of Rib Stitch and Milan Stitch on Objective Hand Values of Weft Knit (위편성물에서 Rib stitch와 Milan stitch의 편성결합이 태에 미치는 영향)

  • Kwon, Jin;Kwon, Myoung-Sook
    • Journal of the Korean Society of Clothing and Textiles
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    • v.31 no.1
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    • pp.68-76
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    • 2007
  • The purpose of this study is to investigate change of mechanical and physical properties, shape behavior and hand value in weft knit when rib stitch and milan stitch are combined. The knit stitches used in this study are plain stitch, half milan rib stitch, milan rib stitch, $2{\times}1$ rib stitch, $2{\times}1$ half milan rib stitch and $2{\times}1$ milan rib stitch. We analyzed physical and mechanical properties(tensile, bending, shear, compression, surface properties, thickness and weight) of the knit stitches and calculated their primary hand value and total hand value through translational formulas using the KES(Kawabata Evaluation System). The results are as follows; In evaluation of mechanical properties and hand values of knit stitches, plain stitch had the highest flexibility and the lowest T.H.V. as women's winter knit wear. Since $2{\times}1$ rib stitch had too high elongation in one direction, although it had the highest T.H.V, it needs to be careful when plain stitch and $2{\times}1$ rib stitch are applied for women's winter knit wear. Since Milan rib stitch and $2{\times}1$ milan rib stitch had high T.H.V. similarly, it is considered that they are suitable for women's winter knit wear. Specially, when Milan stitch is combined with $2{\times}1$ rib stitch, its shape stability and fullness are contained and flexibility is added on it. Therefore, $2{\times}1$ milan rib stitch can be also applied for women's winter knit wear.