• Journal of Korean Society of Forest Science
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• v.101 no.3
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• pp.517-525
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• 2012

In this study, a 4-year-old mountain ginseng was mixed and ripened with 4-year-matured persimmon vinegar, and then it was diluted 5 times and orally administerd to rats. Afterwards, by analyzing the protein expression rate which affects both the carbohydrate metabolism and the lipid metabolism, this study examined the anti-obesity effect of the fusion material. The rats were divided into a control group (CON), a persimmon vinegar group (PV) and a mountain ginseng+persimmon vinegar fusion material group (MPV). The weight gain rate was found to be low in PV and MPV, and the concentration of glucose was also low in PV and MPV. However, GLUT-2 was found to be significantly high in these two groups on the contrary. Both the concentration of free fatty acid and CPT-1 protein expression rate were high in PV and MVP, but MVP was higher than PV. Cytochrome C oxidase was found to be higher in MPV than in CON. AMPK, $PPAR-{\gamma}$ and $PGC1-{\alpha}$ were all high in PV and MPV, but MPV was higher than PV. All the results above verified the thermogenesis effect of the fusion material, leading to an increase of energy metabolism, and it was thought that the fusion material could be effectively used for anti-obesity. However, it seems necessary to verify the anti-obesity effect through various further studies.

• Journal of the Korean Ceramic Society
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• v.55 no.2
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• pp.145-152
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• 2018

Although many bone graft materials have been developed, powder graft materials are somewhat difficult to use in surgery. To solve this problem, a bone graft material in the form of a viscous paste was prepared. Hydroxyapatite was used as a bone graft material, and methyl cellulose was used to impart viscosity. Three cases of samples were prepared, and freeze-dried block type and sintered specimens were made from the paste. The recrystallization of the graft material in a simulated body fluid and the degree of graft adhesion with a tooth were observed by scanning electron microscopy (SEM). The test for cytotoxicity was carried out and the sample was grafted into the back of a mouse to confirm the presence or absence of side effects in the animal's body. Based on these investigations, composites of this type are expected to be applicable for bone grafts.

• Nuclear Engineering and Technology
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• v.49 no.6
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• pp.1346-1353
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• 2017

The FISPACT-II inventory simulation platform is a modern computational tool with advanced and unique capabilities. It is sufficiently flexible and efficient to make it an ideal basis around which to perform extensive simulation studies to scope a variety of responses of many materials (elements) to several different neutron irradiation scenarios. This paper briefly presents the typical outputs from these scoping studies, which have been used to compile a suite of nuclear physics materials handbooks, providing a useful and vital resource for material selection and design studies. Several different global responses are extracted from these reports, allowing for comparisons between materials and between different irradiation conditions. A new graphical output format has been developed for the FISPACT-II platform to display these "global summaries"; results for different elements are shown in a periodic table layout, allowing side-by-side comparisons. Several examples of such plots are presented and discussed.

• Journal of Biomedical Engineering Research
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• v.40 no.5
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• pp.158-164
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• 2019

The interbody fusion cage used to replace the degenerative intervertebral disc is largely composed of titanium-based biomaterials and biopolymer materials such as PEEK. Titanium is characterized by osseointergration and biocompatibility, but it is posed that the phenomenon such as subsidence can occur due to high elastic modulus versus bone. On the other hand, PEEK can control the elastic modulus in a similar to bone, but there is a problem that the osseointegration is limited. The purpose of this study was to implement titanium material's stiffness similar to that of bone by applying cellular structure, which is able to change the stiffness. For this purpose, the cellular structure A (BD, Body Diagonal Shape) and structure B (QP, Quadral Pod Shape) with porosity of 50%, 60%, 70% were proposed and the reinforcement structure was suggested for efficient strength reinforcement and the stiffness of each model was evaluated. As a result, the stiffness was reduced by 69~93% compared with Ti6Al4V ELI material, and the stiffness most similar to cortical bone is calculated with the deviation of about 12% in the BD model with 60% porosity. In this study, the interbody fusion cage made of Ti6Al4V ELI material with stiffness similar to cortical bone was implementing by applying cellular structure. Through this, it is considered that the limitation of the metal biomaterial by the high elastic modulus may be alleviated.

• Fashion & Textile Research Journal
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• v.8 no.5
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• pp.505-512
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• 2006

Today a new culture called fusion has been forming. And it is spreading at an alarming rate in our society. When people talk about the character of Korean beauty and Korean culture, they speak taking pottery as an example. We can speak that the pottery is a core of culture which represent our people. And I think its pattern can be a good material for fusion. Also, among many Western artists, Mondrian is an unique painter who is to do with our culture. So, in this study, I chose the patterns described in Buncheong pottery and the Mondrian's works for the development of fusion textile design. Patterns expressed on Buncheong pottery are, for the most part, abstract patterns simplified the shape of object. And the Mondrian's works is the geometrical abstract painting be made by vertical and horizon. Using those I intend to develop the fusion textile designs which mixed Oriental culture and Western culture. Also, I intended to simulate them on ties and clothes and present the possibility of culture merchandise development. The reasons for doing so to let other peoples of the world, know about our excellent culture.

• Journal of the Korean Society for Precision Engineering
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• v.32 no.9
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• pp.773-779
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• 2015

The laser Powder Bed Fusion (PBF) system is currently recognized as a leading process. Due to the various materials employed such as thermoplastic, metal and ceramic composite powder, the application's use extends to machinery, automobiles, and medical devices. The PBF system's surface quality of prototypes and processing time are significantly affected by several parameters such as laser power, laser beam size, heat temperature and laminate thickness. In order to develop a more elaborate and rapid system, this study developed a new PBF system and sintering process. It contains a 3-axis dynamic focusing scanner system that maintains a uniform laser beam size throughout the system unlike the $f{\theta}$ lens. In this study, experiments were performed to evaluate the effects of various laser scanning parameters and fabricating parameters on the fusion process, in addition to fabricating various 3D objects using a PA-12 starting material.

• Journal of the Korean Ceramic Society
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• v.45 no.11
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• pp.739-743
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• 2008

Microfluidic device can be applied in a wide range of chemical and biological technology. In this paper, ceramic-based T-type passive mixers for microfluidic applications were fabricated by LTCC process combined with thick film photolithography. The base ceramic material in thick film was amorphous cordierite $((Mg,Ca)_2Al_4Si_5O_{18})$ and photoimageable polymers were added to give a photosensitivity. Two types of passive mixer, which showed the channel width of 1.0 mm and $200{\mu}m$, respectively, were designed considering mixing efficiency in the channel and their microfluidic properties were discussed in detail.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.284-284
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• 2010

Currently, hydrogen has been produced by Steam Reforming or partial oxidation reforming processes mainly from oil, coal, and natural gas and results in the production of $CO_2$. However, these are influenced greatly on the green house effect of the earth. so it is important to find the new way to produce hydrogen utilizing water without producing any environmentally harmful by-products. In our research, we use microwave water plasma and photocatalyst to improve dissociation rate of water. At low pressure plasma, electron have high energy but density is low, so temperature of reactor is low. This may cause of recombination in the generated hydrogen and oxygen from splitting water. If it want to high dissociation rate of water, it is necessary to control of recombination of the hydrogen and oxygen using photocatalyst. We utilize the photocatalytic material($TiO_2$, ZnO) coated plasma reactor to use UV in the plasma. The quantity of hydrogen generated was measured by a Residual Gas Analyzer.

• Nuclear Engineering and Technology
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• v.37 no.5
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• pp.423-432
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• 2005

Japanese activities on fusion structural materials R&D have been well organized under the coordination of university programs and JAERI/NIMS programs more than two decades. Where, two categories of structural materials have been studied, those are; reduced activation martensitic/ferritic steels (RAFs) as reference material and vanadium alloys and SiC/SiC composite materials as advanced materials. The R&D histories of these candidate materials and the present status in Japan are reviewed with the emphasis on materials behavior under radiation damage. The importance of IFMIF and technology development for blanket R&D including ITER-TBRG activity is emphasized and the current status of those activities in Japan is also presented.

• Proceedings of the KSME Conference
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• 2001.06a
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• pp.609-615
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• 2001

This study proposes analysis and evaluation method of time series ultrasonic signal using attractor analysis for fusion joint part of polyethylene piping. Quantitatively characteristics of fusion joint part is analysed features extracted from time series. Trajectory changes in the attractor indicated a substantial difference in fractal characteristics. These differences in characteristics of fusion joint part enables the evaluation of unique characteristics of fusion joint part. In quantitative fractal feature extraction, feature values of 4.291 in the case of debonding and 3.694 in the case of bonding were proposed on the basis of fractal dimensions. In quantitative quadrant feature extraction, 1,306 point in the case of bonding(one quadrant) and 1,209 point(one quadrant) in the case of debonding were proposed on the basis of fractal dimensions. Proposed attractor feature extraction can be used for integrity evaluation of polyethylene piping material which is in case of bonding or debonding.