• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.5 s.153
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• pp.762-771
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• 2006

This study provides the basis far salesman to present formal style in suggesting Good-Bad formal style as well as in examining a meaning structure and valuation differences of visual valuation. Stimulus pictures has been chosen consequently 76 pieces through the preliminary inquiry who are working at department store, franchise salesman, car salesman, insurance staff and other salesmen. The tool for visual valuations about suit style is composed of 7 points of Likert type by making 21 questionnaires from the preliminary study. Collecting data is 512 pieces are used to analyse. The duration to collect data was from August 5th to 20th in 2004 and SPSS statistics package program has been used. At first, main factors according to the visual valuation of formal style are Attractiveness, Having abilities, Uncomfortableness. In second, Good formal style shows more attractive and looks having more abilities than Bad formal style and less uncomfortable. In third, in the relations of Good-Bad formal style and demographics, there is meaningful differences according to gender, age, job, salary. In fourth, in the relations of a purchase purpose and visual valuations of formal style, for Good-Bad valuation, the first impression is the most important factor and it is likely to be related to the purchase purpose, on the other hand, the purchase purpose has related to impression the most. It has presented that Good-Bad valuation and purchase purpose have an influence on the factor of Attractiveness.

• Journal of Bio-Environment Control
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• v.14 no.4
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• pp.298-301
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• 2005

Potato (Solamum tuberosum 'Dejima') plantlets were investigated on culture type and initial quantity of inoculation in bioreactor and survival rate by hydroponics for mass production. rode stems (1 to 1.5cm in length) of potato plantlets multiplied in vitro were grown for 3 weeks in liquid Murashige and Skoog (MS) medium with sucrose $30 g\; L^{-1}$. When plantlets (80-node inoculation) were raised in 10L balloon type bubble (BB) bioreactor, the healthiest growth of plantlets was obtained from explants cultured in ebb & flow culture with medium supplied periodically 12 times per day. The suitable inoculation quantity of 20L BB bioreactor was 120 pieces of stem segments (mean 2.2g fresh weight) in ebb & flow culture. Number of nodal shoot was eight on the average. In controlled culture room, survival rate of plantlets at 7 days after stem cutting was above $70\%$ when they were acclimatized by hydroponics grown in deep flow and solid medium culture. The highest survival rate of the stem cutting plantlets was in nutrient solution adjusted to EC $1.4dS{\cdot}m^{-1}$. Stem cutting plantlets through one culture could be obtained $670\~900$, when plantlets were grown in ebb & flow culture during 3 weeks using a 20L bioreactor with initial 120 pieces of nodal segments. 11 is possible In do mass production of seedlings cultured in bioreactor and hydroponics.

• Journal of Elementary Mathematics Education in Korea
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• v.19 no.4
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• pp.589-608
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• 2015

The inquiry subject of this paper is the number of convex polygons one can form by attaching the seven pieces of a tangram. This was identified by two mathematical proofs. One is by using Pick's Theorem and the other is 和々草's method, but they are difficult for elementary students because they are part of the middle school curriculum. This paper suggests new methods, by using unit area and the minimum area which can be applied at the elementary level. Development of programs for the mathematically gifted elementary students can be composed of 4 class times to see if they can prove it by using new methods. Five mathematically gifted 5th grade students, who belonged to the gifted class in an elementary school participated in this program. The research results showed that the students can justify the number of convex polygons by attaching edgewise seven pieces of tangrams.

• Progress in Superconductivity and Cryogenics
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• v.17 no.1
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• pp.21-24
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• 2015

New results of dependence of magnetic field, trapped by a stack of HTS tapes, on amount of tapes in a stack are reported. Commercial GdBCO tape 12 mm width and without Cu layer was used for the research. Tape was divided in square pieces $12{\times}12mm^2$ from which stacks were formed. Filling factor of the tape was about 1.4%. Measurements were carried out for stacks with height from 5 to 250 pieces and at wide temperature range from liquid helium to liquid nitrogen. Both FC (field cooling) and ZFC (zero field cooling) cooling methods were used in the research. These two methods show matching results with good accuracy. As a result dependences of trapped magnetic flux on amount of tapes for different temperatures were received. Research shows, that with increasing height of the stack trapped magnetic field value reach saturation at about 60 tapes in a stack for low temperatures. From 60 to 100 tapes increase of magnet flux is only 5%. Thus increase amount of tapes in a stack is not profitable. Also investigation of trapped magnet field relaxation was carried out. Relaxation speed decreases with increasing amount of elements. It means that the higher the stack is, the longer trapped flux will be held in cause of the same temperature.

• Journal of the Korean Geotechnical Society
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• v.20 no.2
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• pp.97-105
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• 2004

The purpose of this study is to provide the ways of recycling of by-product limes as lightweight fill, backfill materials, and lightweight blocks by performing experimental study. New lightweight fill materials and blocks were devised by mixing by-product lime, weathered granite soil, small pieces of waste EPS, and Portland cement. Physical, geotechnical, and environmental properties of the lightweight mixed soils and blocks were analysed by laboratory experiments for mixed samples manufactured with various mixing ratios. KMS tests were also performed to evaluate the concentration variation of the chemical components of the light weight blocks leachates. It is expected that this study will contribute to resolving the problem of by-product lime disposal as well as to recycling the by-product limes as fill materials and blocks.

• 한국문화재보존과학회:학술대회논문집
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• 2004.10a
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• pp.137-153
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• 2004

We have analyzed the ingredients of 17 pieces of Bronze Age bronze ware, and an additional 22 pieces of Koryo and Chosun dynasty bronze ware. We have also conducted analysis of the extraction sites where these bronze ware items were found. For analyzing the main ingredient the bronze ware items have been divided into 3 groups - Cu-Sn(70?75:20), Cu-Pb-Sn(70:10:10), Cu-Pb-Sn(60:10:20) type respectively. In tile cases of the Cu-Pb-Sn groups the division comes down to differences in the Cu content as the main component, and elements such as Ni, Fe, Co contribute as a micro ingredient. The geographical and periodic characteristics of ancient bronze ware items show that theircompositional element changes from Cu:Sn to Cu:Pb:Sn and the Cu content decreases with the period,while the Pb content increases with the period. Bronze ware items from Suchon Ri, Gongju (that were used in 3 B.C.) form very different categories from 3rd ${\~}$ 2nd B.C.. They additionally formed very different categories from those bronze ware items analyzed in this research. These bronze ware itemsare shown to be geographically close and periodically overlapped, but made of a new elemental composition. This shows an inflow of a production technical culture present in the new bronze wares. The main component content of Cu is lower, and the Co and Fe contents (as microelements) are much higher than that of other bronze ware items. Such facts showthat those bronze ware items used completely different materials from bronze ware items in other cultural areas, or that there were differences in smelting techniques In the places where ancient bronze ware items have been extracted, it is presumed that the materials originated from the southern parts of Korea andnorthern parts and southern parts of China. .As more bronze ware scientific research is compiled one can conclude that that there will be enough scientific evidence to study the Bronze Age culture of Koreasystematically.

• Journal of the Korean Chemical Society
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• v.46 no.5
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• pp.444-456
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• 2002

To protect the occurrence of the oxidation of car body, we developed antioxidizing device made with sacrificial anode. Because car body is made of iron and iron-alloy and oxidation potential of Mg, Al and Zn is higher than that of iron, sacrificial anodes were made with Mg, Al and Zn. Accordingly, Mg, Al and Zn are better oxidizing than car body, iron and iron-alloy can be protected from oxidizing. We have made an antioxidizing device and evaluated their anti-corrosive effect for iron piece in the solution of hydrochloric, nitric and sulfuric acid using balance, SEM and XPS. When iron pieces were connected with antioxidizing device of car body, weight loss by oxidation was remarkably reduced and surface corrosion of iron piece was protected. It was shown that the surface of iron pieces which is not con-nected to the device was changed to iron(Ⅲ) oxide, Fe$_2$O$_3$. Therefore, if this device is attached to car body, corrosion and oxidation of car body will be reduced, considerably.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.6
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• pp.1065-1070
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• 2017

Magnetic gears are magnetically coupled to the input side and the output side of the rotary machine to transmit power without mechanical contact. The magnetic gear consists of an inner rotor, an outer rotor and pole pieces. Torque ripple occurs due to the difference in reluctance between the two rotors and the pole pieces during power transmission. Torque ripple is a cause of the noise and vibration of the rotary machine, so it is necessary to minimize it. In this paper, we propose a shape that cuts the corner of the pole piece and apply a fillet to reduce torque ripple. We used a two-dimensional finite element analysis method to compare and analyze the torque ripple of the magnetic gears according to the change of the fillet parameters and to find the pole piece shape with excellent torque ripple.

• Journal of the Korean Society of Costume
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• v.55 no.1 s.91
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• pp.129-138
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• 2005

There has been a lot of debate between scholars around the folding screen painting, A Beauty under the Tree[조모입여병풍], a collection of Shosoin, Japan. Even though it is preserved in Japan, its distinguished Chinese feature made many scholars to think it might be made in China and be transmitted to Japan. However, the inspection of the material during $1973{\sim}1975$ has revealed an important fact, that is, the feather used in this screen painting belonged to Japanese bird feather. Moreover, a great amount of documents written in Tenbyo(천평승보, 8th century) period, which was thought to be used as the ground material of this painting. Therefore we can get many evidences saying that this painting was made in japan. In a basic sense, I stand on this side just because it has more evidences. However, we must be careful to make a final conclusion. Especially on the precious things like this painting screen, we must take whole considerations as possible as we can. First of all, we must consider whether Japan could have ability to make this. Second, there could be other possibility that Japanese repair the original one with their feathers or papers. In order to prove this, study on other pieces including painting screens should be done. I just suggest an objective international discussion. Lastly, I can find the common feature between the pieces of Shosoin and the ones of United Shilla, which could be influenced by same impact, the Silk road trade in a broad sense.

• Journal of the Korean Society of Costume
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• v.59 no.8
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• pp.132-151
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• 2009

All of 132 kinds of fabrics are used in excavated costume from the Dongrae Jung's Tomb. Classified by its materials, it is divided into small groups as follows: 58 pieces of silk tabby 43.9%, 2 of filament silk tabby 1.5%, 14 of thin filament silk tabby 10.6%, 19 of spun yarn silk 14.4%, 4 of twill without a pattern 3.0%, 8 of patterned silk tabby 6.1%, 23 of satin damask 17.4%, 1 of damask with supplementary gold thread 0.8%, 2 of mixture fabric with silk and cotton 1.5%, and 1 of ramie fabric 0.8%. Classified by ways of weaving: 96 pieces of plain weave 73%, 23 of satin weave 17%, 8 of patterned silk tabby consisting of plain weave material and twill weave pattern-6%, 4 of twill weave 3%, and 1 of compound weave 1 %. In point of patterns, the most often used ones are plant patterns such as lotus patterns, peony patterns, plum blossom patterns, flowers representing seasons patterns, and small flower patterns. For animal patterns, it has phoenix patterns designed together with flowers representing seasons patterns. And for natural scenery patterns, it shows cloud patterns with treasures patterns together. For object patterns, it also shows treasures patterns mixed with cloud or lotus together. For geometrical patterns, it has rhomboid patterns and 卍 character patterns; some show only rhomboid patterns and others show material patterns of 卍 character patterns blended together with fruit, lotus, etc.