• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1078-1084
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• 2011

In design of sport footwear, bending stiffness of its toe part is an important factor though it can be hardly measured. This paper introduces a device for measuring the bending stiffness. The device is simply designed with aluminum frames, one AC motor, two load-cells, one encoder and control hardwares. The mechanism measuring the bending moment of a shoe is described. Then, it was used to observe how the midsole material and design of a sports shoe affect on its bending stiffness. For the experiments, various specimens prepared, where each midsole of the specimens is different in terms of material, thickness and hardness. With those specimens, experiments were performed by using the device and then the bending stiffness was computed by applying the least square curve fitting after the bending moment data were measured. The specimen with Poly-urethane(PU) midsole has the higher bending stiffness than the one with Phylon(PH) midsole, and the midsole thickness affects more on the bending stiffness than the midsole hardness. Based on those results, it can be concluded that the measurement device can provide consistent bending stiffness data to sports footwear and the bending stiffness of a footwear measured by the developed device can be used as a major parameter in the footwear design.

• The KIPS Transactions:PartB
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• v.11B no.6
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• pp.683-690
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• 2004

Garment modeling and simulation is now one of the important elements in broad range of digital contents. Though there have been recent products on garment simulation, general users do not know well enough how to design a virtual costume that meets some requirements about its specific clothing pattern. In particular, Hanbok - the Korean traditional costume - has many different characteristics against western ones in the aspect of its pattern design and of draping. This paper presents a knowledge-driven approach for virtual Hanbok modeling without knowing how to make real Hanbok. First, parameterized knowledge for several fabric types art solicited using visual similarity assessment from simulated and real cloth. Secondly, based on the analysis of designer's knowledge, we defined multi-level adjustment processes of Hanbok measurements with regard to body shape features for different virtual actors. An experimental system is developed as the form of a Maya plug-in and the result shows the applicability of the proposed method.

• Journal of the Korea Convergence Society
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• v.11 no.2
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• pp.309-314
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• 2020

This study was designed to investigate the antioxidant effects of 10 kinds of medicinal plants and vegetable extracts and total extracts. The cytotoxicity was measured by MTS assay, and the antioxidant activity was measured by DPPH free radical scavenging activity and Riboflavin-derived superoxide inhibitory activity (SQA). As a result, cytotoxicity was safe for all 10 medicinal plants, vegetable extracts and total extracts. DPPH free radical scavenging ability was observed in Cinnamomum cassia Blume, Eugenia caryophyllata Thunb. Arctium lappa, Total extract was excellent, and Riboflavin-derived superoxide inhibitory activity (SQA) was found in Cinnamomum cassia Blume, Arctium lappa, Prunus mume Sieb. et Zucc., Excellent, but total extract showed the best antioxidant effect. As a result of comparing the antioxidant effects of medicinal plants and vegetables using traditional ingredients, the antioxidant activity was increased when used as a mixture than when used alone. It is considered that it can be used as an antioxidant functional material, and it is expected to be of value when developing antioxidant material in the future.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.2
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• pp.193-204
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• 2002

Many fashion forecasting companies propose the fashion colors in every season. Modern fashion consumer respond to fashionable trends with utmost sensitivity. Therefore to satisfy the consumer with an trendy image, the fashion design must be found first, as image matters, followed by an analysis of each design element's effect on the total image composition. In previous studies of fashion image, has been discussed the positive correlation between fashion design elements of color, fabric, and form as the central issue. In this thesis, two of the fashion design elements, color and fabric are simultaneously considered to classify the image of fabric in fashion. For the color variables, 10 hues are selected from Munsell's system of color notation, and 12 tones from PCCS color notation., which are currently used in the domestic fashion industry. Texture variables used in this survey are classified by luster, prominence-depression of surface, thickness, and density of fabric. Graduate students from 20 to 50 years old and the specialists in fashion companies participated in the survey. The results of this survey are as follows: 1. The fashion fabric image is classified as 5 main images: 'elegant', 'comfortable', 'characteristic', 'light'and 'simple'. 2. The influence of hue, tone and texture is significant to the fashion fabric image. Following colors, yellow-red, red hues and light grayish, dark grayish tones convey the elegant image. The texture property for the elegant image is luster, thin and low density. Properties of fabric conveying the comfortable image are yellow-red and green-yellow hue, soft, light tones, matte and high density. Furthermore, hue turned out to be a insignificant variables for the unique image, whereas dark grayish, grayish tone, luster and prominent texture convey a unique image. For light image, properties of fabric are blue-green, purple hues, light, bright tones with thin, low density texture. Properties of fabric conveying the simple image are blue-green, purple-blue, green-yellow hues, and strong, vivid tones, with luster and flat texture.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.1
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• pp.65-69
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• 2010

Collagen is the most abundant animal protein in mammals, accounting for about 30 % of all proteins. It is present in connective tissue and contributes to the structural framework of most organs. The tripeptide (glycineproline-hydroxyproline) with the INCI name Tripeptide-29 is main component of collagen type I. The palmitoyl tripeptide (palmitoyl-glycine-proline-hydroxyproline) with the INCI name Paimitoyi Tripeptide-29 is a synthetic material that was designed as a topical agent to stimulate collagen production. We synthesized the palmitoyl tripeptide as a potential anti-wrinkle compound. This compound has been characterized using HPLC. This compound proved, through in vitro tests, to stimulate collagen production and fibroblast proliferation. These results were very promising, so human studies were subsequently performed. We investigated the skin improvement effect of the palrnitoyl tripeptide on human skin by using non-invasive instruments. We measured physiological effects such as skin wrinkles and elasticity after volunteers applied the cosmetic products for 8 weeks. We observed significant improvement in skin wrinkles and elasticity after use of the cosmetic products for 8 weeks. We concluded that the palmitoyl tripeptide had an anti-aging effect on human facial skin.

• Journal of Fashion Business
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• v.23 no.2
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• pp.62-76
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• 2019

The importance of color is increasing in modern life and we call such present age that is 'color age'. These day that all areas of life are being getting fashionize, ordinary people as well as design specialist are required of culture and knowledge about color. Color design education is important curriculum at liberal arts course and in special design trainning course. Color expresses by hue, value and chroma in Munsell color system. But design spot is using mainly hue and tone color system. Therefore it is very important that educate tone concept in color design education. When think influence that increase of color, we must develop hue and tone color system in suitable for color design education. This research designed usable 'Hue and Tone 313 Colot System' for efficeint sensual color education. Also I designed 313 color papers with attached the Munsell notation which could reappear the spare color paper when needed. The 10 hues classification of this system are Red, Yellow Red, Yellow, Green Yellow, Green, Blue Green, Blue, Purple Blue, Purple, Red Purple. The 19 tones classification of this system are vivid, light, standard, deep, pale, soft, dull, dark, very pale, light grayish, medium grayish, dark grayish, very dark, off White, off Pale, off Light Gray, off Medium Gray, off Dark Gray, off Black. The special colors of this system are gold, silver and copper.

• Korean Journal of Materials Research
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• v.29 no.4
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• pp.221-227
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• 2019

This study examines the role of the nano- and micro-particle ratio in dispersion stability and mechanical properties of composite resins for SLA(stereolithography) 3D printing technology. VTES(vinyltriethoxysilane)-coated $ZrO_2$ ceramic particles with different nano- and micro-particle ratios are prepared by a hydrolysis and condensation reaction and then dispersed in commercial photopolymer (High-temp) based on interpenetrating networks(IPNs). The coating characteristics of VTES-coated $ZrO_2$ particles are observed by FE-TEM and FT-IR. The rheological properties of VTES-coated $ZrO_2/High-temp$ composite solution with different particle ratios are investigated by rheometer, and the dispersion properties of the composite solution are confirmed by relaxation NMR and Turbiscan. The mechanical properties of 3D-printed objects are measured by a tensile test and nanoindenter. To investigate the aggregation and dispersion properties of VTES-coated $ZrO_2$ ceramic particles with different particle ratios, we observe the cross-sectional images of 3D printed objects using FE-SEM. The 3D printed objects of the composite solution with nano-particles of 80 % demonstrate improved mechanical characteristics.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.2
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• pp.289-296
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• 2019

Recently, the development of smartphone camera technology enables to shoot high quality video. In order to utilize these techniques in various ways, it is necessary to be able to transmit signals to an external device such as a external display. The transmission performance of the video signal is determined by the loss of the transmission line and the length of the wiring. In this paper, we propose the HDMI transmission line design criterion according to the wiring length changed according to the smartphone design and the surface roughness amplitude of the printed circuit board conductor wiring material. Also, we verified the proposed design criteria for the actual smartphone design. The proposed design criterion can be applied to various application fields including high-speed signal transmission line besides mobile application.

• Journal of Industrial Convergence
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• v.20 no.7
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• pp.123-129
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• 2022

It was to establish the usage possibility as cosmetic material by testing stimulation of Leuconostoc mesenteroides which were cultured from human scalp's dead skin cell by patching it to the skin in the form of solubilized essence. Cultured L. mesenteroides diluted to 1% concentration and essence which contains it were patched to 31 and 32 participants' back each for 24 hours and established the stimulus figures by the specialists in 30 minutes, 24 hours, and 48 hours after they were taken off. They are both revealed as non-stimuli due to the result of 0.011 and 0 points each and therefore they are safe when used as skin products. Considering the results of this test and the other previous studies which reported the L. mesenteroides as anti-allergic, antioxidant, and anti-inflammatory, L. mesenteroides is usable for cosmetics and worth further research.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.35-43
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• 2022

It was to test the efficiency of essence containing scalp derived Leuconostoc mesenteroides extract on relieving hair loss and the possibility of the usage as the functional cosmetic's material. 41 subjects were classified as the control and test group and for 24 weeks, from Apr. 15th 2021 to Nov. 4th 2021, they were double blindness, contrast samples, single organs, and randomized human applicating tests were performed. The amount of hair had meaningful change (p<0.001) seen through phototricogram in 8,16,24 weeks each, and could tell the difference by researcher's bare eye after 24 weeks. Since there were meaningful changes (p<0.017) in subjective evaluation of the subject on after 8,16,24 weeks time, Essence which contains 1% of L. mesenteroides has efficiency on hair loss. Therefore, L. mesenteroides is expected to be used as various cosmetics to prevent hair loss.