• Conservation Science in Museum
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• v.8
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• pp.71-79
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• 2007

The Conservation Science Team at National Museum of Korea has Reproduced the silk wrapper that was used the sarira reliquary found from Pagoda in the Bonginsa, in order to use it in the process of alternating the relics on display in the Hangeul(the Korean language) of the Historical Gallery. Silk fabric of the same texture as the original was used for reproduction. As for the process of dyeing silk fabric, fermented Indigo deposits was used for bluish color, while fruits of the alder trees were used to express the parts that have been faded into yellowish. The Korean characters(court style hangeul) written on the wrapper have been replicated through the use of Ink-stick.

• Proceedings of the Korea Association of Crystal Growth Conference
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• 1996.06a
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• pp.139-156
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• 1996

The phase field model is becoming the model of choice for the theoretical study of the morphologies of crystals growth from the melt. This model provides an alternative approach to the solution of the classical (sharp interface) model of solidification by introducing a new variable, the phase field, Ø, to identify the phase. The variable Ø takes on constant values in the bulk phases and makes a continuous transition between these values over a thin transition layer that plays the role of the classically sharp interface. This results in Ø being governed by a new partial differential equation(in addition to the PDE's that govern the classical fields, such as temperature and composition) that guarantees (in the asymptotic limit of a suitably thin transition layer) that the appropriate boundary conditions at the crystal-melt interface are satisfied. Thus, one can proceed to solve coupled PDE's without the necessity of explicitly tracking the interface (free boundary) that would be necessary to solve the classical (sharp interface) model. Recent advances in supercomputing and algorithms now enable generation of interesting and valuable results that display most of the fundamental solidification phenomena and processes that are observed experimentally. These include morphological instability, solute trapping, cellular growth, dendritic growth (with anisotropic sidebranching, tip splitting, and coupling to periodic forcing), coarsening, recalescence, eutectic growth, faceting, and texture development. This talk will focus on the fundamental basis of the phase field model in terms of irreversible thermodynamics as well as it computational limitations and prognosis for future improvement. This work is supported by the National Science Foundation under grant DMR 9211276

• Journal of the Korean Society of Costume
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• v.60 no.4
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• pp.18-29
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• 2010

For the Gwangyang Ume Flower Festival, this study sought to develop competitive fashion culture goods design and to activate regional culture festival by reinterpreting ume flower image in accordance with current trends, manufacturing motive patterns, and applying them to neckties, scarves, and T-shirts. In terms of method, four basic motives were set that showed new figurative images of ume flowers using Adobe Illustrator 10. The repetitive units of each motive we combined with the ume flower motives and the geometrical patterns, such as quadrangle, triangle, and circle. The basic direction of design was set so that color and texture could have colorful, modern, and natural images using pastel tone and gradation. The set patterns were applied to the repetition, the repetition of the transformed patterns of 45 angle, and the strife patterns, making it possible to display various images in the fashion items such as neckties, scarves, handkerchiefs, or T-shirts. The development of such fashion culture goods seems to be more significant, since they can be easily accessed by general festival participants. Accordingly, the Gwangyang Ume Flower Festival seems to develop not into food-led festival, but into a cultural festival that can publicize more various programs and create profits.

• Journal of the Korean Society of Clothing and Textiles
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• v.22 no.6
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• pp.725-736
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• 1998

The purposes of this study were to identify the dimensions of consumers' dissatisfaction with dress shoes when purchase and while using them, and to examine the differences in dissatisfaction factors among consumers grouped by age, occupation and purchasing characteristics. A questionnaire consisted of 86 consumer's dissatisfaction statements with purchasing and using women's dress shoes was developed after conducting 3 pilot tests, and administered to 5BO women in age between 20 and 60 years residing in Seoul and the metropolitan areas in June, 1997, 457 were used for data analysis. Ten factors of dissatisfaction with the women's dress shoes when buying them were identified: attitudes of salespersons, bargain sales, variety of styles, store environment, inconvenience in using girt certificates, fashion. advertisement, display, design, and size. During purchase stage, consumers grouped by demographic characteristics and purchase behaviors showed significant differences in design, attitudes of salespersons, store environment, and selected dissatisfaction factors. Nine dissatisfaction factors with using dress shoes were identified: physical discomfort, after-service, distort of shape, low quality, surface defects, suede/ wearing out, fit, inferiority of color and texture/walking discomforts. During consumption stage, consumers with different demographic characteristics and purchase behaviors were found significantly different in physical discomfort, fit, and selected dissatisfaction factors.

• Korean Journal of Metals and Materials
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• v.47 no.8
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• pp.516-521
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• 2009

In this study we report a rapid synthesis of nanoporous organo-functional silica (OFS) with unimodal and bimodal pore structures encompassing pores ranging from meso-to macroscale. The problems of tediousness and high production cost in the conventional syntheses are overcome by co-condensation of an inexpensive inorganic precursor, sodium silicate with an organosilane containing trimethyl groups. The insitu covalent anchoring of the non-polar trimethyl groups to the inner pore walls prohibits irreversible shrinkage of the wet-gel during microwave drying at ambient pressure and thus larger size pores (from ca. 20 to ca. 100 nm) can be retained in the dried silica. The drying process of the silylated wet-gels at an ambient pressure can be greatly accelerated upon microwave exposure instead of drying in an oven or furnace. Using this approach, anoporous and superhydrophobic silicas showing a wide variation in texture and morphology can be readily synthesized in roughly two hours. The effects of various sol-gel parameters solely on the textural properties of the organo-functional silica (OFS) have been investigated and discussed.

• Journal of the Korean Society of Costume
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• v.33
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• pp.105-115
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• 1997

The fashion clothing market is changing due to the appearance of new consumer group. And the import of foreign brand clothing is highly increasing. The purpose of this study is to help the domestic apparel companies set better market-ing strategy by studying the relation between fashion ivolvement and the purchase be-havior of foreign brand clothing. Subjects were 498 new generation women living Seoul metropolitan area. Data were obtained by questionnaire and analyzed by SPSS package. The main findings of this study are as follows; 1. The result of factor-analysis of the fashion involvement's variables were classified into 8 factors. 2. Consumer's main purpose of buying new clothes were To coordinate clothes with each other' 3. Consumers evaluated every clothing factors: color fit etc of foreign brand very highly except the price. 4. The factor that consumers consider most when choosing clothes is color design fit de-tail texture and brand knowledge in order. 5. the advertizing method that consumers care the most was shop and window display. 6. 'Because design and color are good' were the most important factor as motive of buying foreign brand clothing. 7. Most consumers still bought domestic brand clothing. 7. Most consumers still bought domestic brand clothing. 8. Monthly income and purchase of foreign brand were positively related 9. All variables 2of fashion involment were positively related with the purchase of foreign brand 10. Consumers with higher monthly income did not care much about 'Weather or occasion' when buying clothes. And consumers living in Kangnam(compared with consumers linving in Kangbuk) cared more about personality and bought more foreign brand. 'Social and econ-omic status' were highly related with monthly income residence and purchase of foreign brand clothing 11. Older consumers cared more about color figure texture and fit than younger con-sumer. Monthly income were positively re-lated with design color and figure. Residence were highly related with color and figure. Pur-chase of foreign brand clothing were positively related with design color figure and fit. 12. Younger consumers cared more about brand knowledge. And the purchase of foreign brand clothing were positively related with de-sign detail and brand knowledge. 13. Consumers with foreign brand's purchase experience showed negative relation between ;foreign brand's purchasing experience' and 'Weather or occasion' 14. Consumers with no foreign brand's pur-chasing experience showed negative relation between fashion innovativeness and figure. 15. Consumers with no foreign brand's pur-chasing experience showed positive relation between fit and fashion opinion exchange. The study shows that colors is most import-ant factor in purchasing clothes. And imported brands are very strong in terms of proposing various and unique colors. not all brands succeeded in Korea. Those brands that failed to group consumers have the following problems. Therefore it is critical to review the above factors when importing the foreign brand.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.26 no.1
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• pp.73-83
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• 2008

For spatial analysis and decision-making based on territorial and urban information, technologies on 3D GIS with digital image data and photo-realistic 3D image models to visualize 3D modeling are being rapidly developed. Currently, satellite images, aerial images and aerial LiDAR data are mostly used to build 3D models and textures from oblique aerial photographs or terrestrial photographs are used to create 3D image models. However, we are in need of quality 3D image models as current models cannot express topographic and features most elaborately and realistically. Thus, this study analyzed techniques to use aerial photographs, aerial LiDAR, terrestrial photographs and terrestrial LiDAR to create a 3D image model with artificial features and special topographic that emphasize spatial accuracy, delicate depiction and photo-realistic imaging. A 3D image model with spatial accuracy and photographic texture was built to be served via 3D image map services systems on the Internet. As it was necessary to consider intended use and display scale when building 3D image models, in this study, we applied the concept of LoD(Level of Detail) to define 3D image model of buildings in five levels and established the models by following the levels.

• Journal of Broadcast Engineering
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• v.17 no.4
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• pp.625-633
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• 2012

Extended Depth of Focus (EDF) algorithms for extracting three-dimensional (3D) information from a set of optical image slices are studied by many researches recently. Due to the limited depth of focus of the microscope, only a small portion of the image slices are in focus. Most of the EDF algorithms try to find the in-focus area to generate a single focused image and a 3D depth image. Inherent to most image processing algorithms, the EDF algorithms need parameters to be properly initialized to perform successfully. In this paper, we select three popular transform-based EDF algorithms which are each based on pyramid, wavelet transform, and complex wavelet transform, and study the performance of the algorithms according to the initialization of its parameters. The parameters we considered consist of the number of levels used in the transform, the selection of the lowest level image, the window size used in high frequency filter, the noise reduction method, etc. Through extended simulation, we find a good relationship between the initialization of the parameters and the properties of both the texture and 3D ground truth images. Typically, we find that a proper initialization of the parameters improve the algorithm performance 3dB ~ 19dB over a default initialization in recovering the 3D information.

• Journal of Institute of Control, Robotics and Systems
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• v.22 no.2
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• pp.139-146
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• 2016

Recently, popularity of 3D technology has been growing significantly and it has many application parts in the various fields of industry. In order to overcome the limitations of 2D machine vision technologies based on 2D image, we need the 3D measurement technologies. There are many 3D measurement methods as such scanning probe microscope, phase shifting interferometry, confocal scanning microscope, white-light scanning interferometry, and so on. In this paper, we have used the extended depth of focus (EDF) algorithm among 3D measurement methods. The EDF algorithm is the method which extracts the 3D information from 2D images acquired by short range depth camera. In this paper, we propose the EDF algorithm using the edge informations of images and the average values of all pixel on z-axis to improve the performance of conventional method. To verify the performance of the proposed method, we use the various synthetic images made by point spread function(PSF) algorithm. We can correctly make a comparison between the performance of proposed method and conventional one because the depth information of these synthetic images was known. Through the experimental results, the PSNR of the proposed algorithm was improved about 1 ~ 30 dB than conventional method.

• Applied Chemistry for Engineering
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• v.9 no.1
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• pp.71-75
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• 1998

Liquid crystalline compounds with amine terminal group and related linear and cross-linked liquid crystal polymers with epoxy resin structure were synthesized and characterized to develope matrix materials for polymer dispersed liquid display applications. Both linear and crosslinked side chain type liquid crystal polymers made with aromatic amine mesogens and ethylene glycol diglycidyl ether exhibited nematic texture as shown by polarized optical microscope(POM) and their transition temperatures were determined both by DSC and POM. Liquid crystal polymer samples also showed even-odd effect as the spacer length of aromatic amine mesogens were varied, however, the effect was samller than that of low molecular weight mesogens. Changes of nematic-to-isotropic transition($T_{NI}$) of crosslinked type polymer liquid crystals were also disscussed in relation to the concentration change of crosslinking agent 1,10-diaminodecane.