• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.10a
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• pp.24-29
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• 2003

Deep sea water has cold temperature, abundant nutrients and minerals, and good water quality that is pathogen-free and stable. Compared with surface water, deep sea water contains more nutrition salt, such as nitrogen and phosphor. Moreover, if has the good balance of minerals. Because of the ability of the spray drying process to produce a free-flowing power considering of spherical particles with a well-defined size distribution and the rapid drying times for heat-sensitive material, spray drying is attractive for a wide range of applications spray drying is a unique unit operation in which powders are produced from a liquid feed in a single processing step. Key component of the process are atomizer, spray chamber. Design of spray chamber should be based on the atomizer type, the production rate, and the particle size required. Because of the complex processes taking place during spray drying, traditional design method are based on pilot-plant tests and empirical scale-up rules. Modern technique such as CFD have a role to play in design and troubleshooting.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1583-1585
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• 2007

The purpose of this research is to control proper processing condition of RGB photo resistant in the ink-jet process increasing processing ability by adding additives. The viscosities of modified RGB photo resistant were $10{\sim}14cps$ and the additives could decreased agglomeration and flowing trace of photo resistant effectively. Another way, the adhesion between photo resistant and glass substrate was improved by modifying photo resistant and substrate. The surface tensions of modified photo resistant were same as that of original RGB photo resistant. The additives appeared a better compatibility with photo resistant, and the micelle of photo resistant did not be broken during modified process.

• Journal of the Korean Geotechnical Society
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• v.20 no.8
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• pp.89-96
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• 2004

Many researches have been devoted to developing a model fur bridge scour analysis which can consider both of the erosive potential of flowing water and the relative ability of the soil to resist erosion. The scour rate apparatus that can quantify the erosion rate of the soil has been developed by virtue of the extensive efforts. The scour rate tests were performed on 3 types of the remolding clay samples using the scour rate apparatus. The erosion characteristics of the fine-grained soil samples according to the variation of the remolding loads are examined and the correlation between the soil properties and erosion rates is also analyzed. The results of the tests and analyses show that the soil properties, especially the dry unit weight and the shear strength of the soil have great influence on the erosion characteristics.

• Progress in Superconductivity and Cryogenics
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• v.12 no.1
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• pp.1-5
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• 2010

Silver stabilizing layer of coated conductor has been prepared by dip coating method using organic silver complexes containing 10 wt% silver as a starting material. Coated silver complex layer was dried in situ with hot air and converted to crystalline silver by post heat treatment in flowing oxygen atmosphere. A dense continuous silver layer with good surface coverage and proper thickness of 230 nm is obtained by multiple dip coatings and heat treatments. The film heat treated at $500^{\circ}C$ showed good mechanical adhesion and crystallographic property. The interface resistivity between superconducting YBCO layer and silver layer prepared by dip coating was measured as $0.67\;{\times}\;10^{-13}\;{\Omega}m^2$. Additional protecting copper layer with the thickness of $20\;{\mu}m$ was successfully deposited by electroplating. The critical current measured with the specimen prepared by dip coating and sputtering on same quality YBCO layer showed similar value of ~140 A and proved its ability to replace sputtering method for industrial production of coated conductor.

• Nuclear Engineering and Technology
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• v.54 no.11
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• pp.4310-4321
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• 2022

The concept of dense granular-flow target (DGT) for the China Initiative Accelerator Driven Subcritical system (CiADS) is an attractive choice for high heat removal ability, low chemical toxicity, and radiotoxicity. A wobbling hollow beam is proposed to enhance the homogeneity of temperature rise of flowing particles in beam-target coupling zone. In this paper, the design procedure of target and beam parameters was discussed firstly. Then we simulated the heat deposition and transfer of the scanning beam in DGT to study the effect of beam parameters. The results show the flux density of proton beam plays a crucial role in the distribution of temperature rise while the contributions from scanning frequency heat transfer are also obvious. Moreover, heat transfer in transversal directions is insignificant, resulting in a low heat flux towards the sidewalls of DGT. This work not only contributes to the design of DGT, but also beneficial for understanding the beam-target coupling in porous materials.

• Journal of Oriental Neuropsychiatry
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• v.3 no.1
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• pp.3-24
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• 1992

This paper is aimed at finding out the clue to the medical solution to the pathological phenomena of the dehumanizing and demoralizing state of our society by centering around the Chiljeong that originates from Oriental Medicine, Sung Confucianism and Sa-sang Medicine(四象醫學). In these fields,the Chiljeong is based on the theory of Eum-yang and Viscera(陰陽.臟腑論) in Oriental Medicine, on the problems of good and evil in Sung Cunfucianism and on the theory of Sa-sang Visceral Localization(四象.臟局의 理論) in Sa-sang Medicine. The principles of geneation of Chiljeong : In case of Oriental Medicine, Sin(神) controls Chiljeong and of it is stored in five Viscera, it becomes Sin in the Heart, Hon(魂) in the Liver, Sa(思) in the Spleen, Bed-Woo(悲.憂) in the Lung, and Kyeong-Kong(驚.恐) in the Kidney. Then five Viscera react with outer stimuli or Sin, it gives off Chiljeong as Joy(from the Heart), Anger(from the Liver). Thought (from the Spleen), Anxiety and Sorrow(from the Lung) and Surprise and Fear(from the Kidney) In Sung Confucianism, Sim(心) comtrols Seong-jeong(性.情), and at the moment of that Sim gives off Jeong(情), it becomes good when the Li(理) gibes off itself and then Chi(氣) follows Li, or Chi gives off itself and is regulated optimally, out it becomes evil when Li cannot preside over Chi and then shaded by cloudy Chi. The pathology: If the Chiljeong exceeds one's capacity, the corresponding Vicsera will be damaged, and the Passions(喜.怒.哀.樂) that may harm to four types of constitution severly are the Joy and Pleasure(in Tae-eum-in 太陰人 and So-eum-in 少陰人) and Grief and Anger(in Tae-yang-in 太陽人 and So-yang-in 少陽人), so one should be alert on some passions by regrding his constitutional frailty. More over, because of the variations in Sa-sang Visceral Localyzatin there is various ability in human affairs, but as the clumsiness in human affairs may make him hurt by it, so one should be prevented from these passions and human affairs, that is flowing Joy and Participations(黨與) in Tae-yang-in, flowing Pleasure and Dwelings(居處) in So-yang-in, explosive Anger and Companies(交遇) in So-eum-in, explosive Grief and Affairs(事務) in Tae-eum-in. How to clutivate the human nature: The ulitmate purpose in Oriental Medicine is preserving Cheon-Jin(天眞), that is following the Tao(道) by making him be in harmony with the Chi(氣) of the Seasons and by living a simple life. In Sung Confucianism, the way preventing the lustful desire and preserving Cheon-li(天理) is to observate derectly the calm, original place of human nature with reverence, when Sim has nat given off itself yet, and when Sim has already given off, it also is to meditating on one's passion and thought that the principle of good should be researched on or the evil should be cut off according to it's being good or evil. Such like as these various aspects of research on the Chiljeong it will be helpful in understanding human nature by producing the various materials on it, moreover, by doing so, we can lead out appropriate solution on the confusions of judgement value and demoralization.

• Journal of Korea Water Resources Association
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• v.38 no.3 s.152
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• pp.235-244
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• 2005

This study was carried out in Osan river to quantitatively investigate behavior of attacked microbial community (AMC) for enhancing self-purification process of river. We gained the results such as follows throughout long-term monitoring at in-situ river. The biomass of AMC had higher in the riffle than the almost stagnant pool and they were more developed in the riffle with high current velocity (HCV). Although the fast flowing current affects negatively to growth of the AMC during the early phase when the community gets attached to the benthic substrate, it was observed that it affected positively to their growth during the intermediate and later phase after the community is adapted to the substrate. When turbulence due to external pressure (storm or discharge of dam and reservoir) occurs, the degree of separation depends upon the flowing strength and the type of the external pressure. Since the community is not all separated, recovery is rather fast. Therefore, this study found that the degree of reduction of the pollutant by self-purification of the stream is depended upon the riverbed shape and the AMC contributes to self-purification positively or negatively in river. Therefore, the riverbed shape must be constructed in accordance with the characteristics of water quality in stream. Furthermore, the technique of installing the water channel structure appropriate for each section must be developed to maximize self-purification ability.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.6 s.154
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• pp.829-839
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• 2006

Sustainable development is generally defined as an approach that 'meets the needs of the present without compromising the ability of future generations to meet their own needs' (World Commission on Environment and Development: WCED, 1987, p. 43). The sustainable development is a holistic concept that encompasses three aspects: environmental protection, economic development, and social contribution. From the sustainable development perspective, environmental management must consider contributions to other economic and social aspects. In this sense, it differs from narrowed environmental management which focuses on only environmental impacts, and a well-being concept in Korea that mainly appeals to health. Recently, leading apparel firms, such as Nike, Otto, and Marks & Spencer, are increasingly adopting the environmental management to achieve the future competitive advantage. The environmental management can be achieved through integrated supply chain management. Despite of flowing importance of environmental supply chain management in practice, academic attention to this area has been seriously lacking. This study regards the environmental management by the sustainable development perspective as a solution for Korean apparel firms to solve their current sluggish growth. The purpose of this study was to provide Korean apparel firms with guidelines toward the environmental management based on extensive literature reviews and case studies. The paper started with two important research frameworks, the sustainable development and the environmental supply chain. Within the frameworks, the leading cases of the environmental management of Korean and foreign apparel firms were analyzed. Both macroscopic and microscopic applications of the environmental supply chain management for Korean apparel firms were suggested based on the analyses.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.18-18
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• 2010

Methods of the characteristics evaluation of turbo-molecular pumps (TMP) are well-defined in the international measurement standards such as ISO, PNEUROP, DIN, JIS, and AVS. The Vacuum Center in the Korea Research Institute of Standards and Science has recently designed, constructed, and established the integrated characteristics evaluation system of TMPs based on the international documents by continuously pursuing and acquiring the reliable international credibility through measurement perfection. The measurement of TMP pumping speed is normally performed with the throughput and orifice methods dependent on the mass flow regions. However, in the UHV range of the molecular flow region, the high uncertainties of the gauges, mass flow rates, and conductance are too critical to precisely accumulate reliable data. With UHV gauges of uncertainties less than 15% and a calculated conductance of the orifice, about 35% of pumping speed uncertainties are experimentally derived in the pressure range of less than $10^{-6}$ mbar. In order to solve the uncertainty problems of pumping speeds in the UHV range, we introduced an SRG with 1% accuracy and a constant volume flow meter (CVFM) to measure the finite mass flow rates down to $10^{-3}$ mbar-L/s with 3% uncertainty for the throughput method. In this way we have performed the measurement of pumping speed down to less than $10^{-6}$ mbar with an uncertainty of 6% for a 1000 L/s TMP. In this article we suggest that the CVFM has an ability to measure the conductance of the orifice experimentally with flowing the known mass through the orifice chambers, so that we may overcome the discontinuity problem encountering during introducing two measurement methods in one pumping speed evaluation sequence.

• Journal of Powder Materials
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• v.12 no.5 s.52
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• pp.336-344
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• 2005

In the present study, the focus is on the effect of cobalt oxide powder in the carbothermal reduction of the titanium-cobalt-oxygen based oxide powder by solid carbon for the optimizing synthesis process of ultra fine TiC/Co composite powder. The titanium-cobalt-oxygen based oxide powder was prepared by the combination of the spray drying and desalting processes using the titanium dioxide powder and cobalt nitrate as the raw materials. The titanium-cobalt-oxygen based oxide powder was mixed with carbon black, and then this mixture was carbothermally reduced under flowing argon atmosphere. Changes in the phase structure and thermal gravity of the mixture during carbothermal reduction were analysed using XRD and TGA. Titanium-cobalt-oxygen based oxide powder desalted at $600^{\circ}C$ had a mixture of $TiO_2\;and\;Co_{3}O_4$. And the one desalted at $800^{\circ}C$ had a mixture of $TiO_2\;and\;CoTiO_3$. In the case of the former powder, the reduction of cobalt oxide powder in the titanium-cobalt-oxygen based oxide powder occurred at lower temperature than the latter one. However, the carbothermal reduction of titanium dioxide powder in the titanium-cobalt-oxygen based oxide powder with a mixture of $TiO_2\;and\;Co_{3}O_4$ occurred at higher temperature than the one with a mixture of $TiO_2\;and\;CoTiO_3$. And also, the former powder showed a lower TiC formation ability than the latter one.