• Economic and Environmental Geology
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• v.53 no.3
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• pp.259-269
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• 2020

The use of the geophysical method in mining prospecting has been studied in the Asdaf region (South-East of Morocco). The objective of the study is to examine the aptitude of the electrical technique, in this case induced polarization (IP) and electric tomography, combined with the electromagnetic method (VLF), in the exploration of barite . The result obtained by the pseudo-sections of electrical tomography and that of KH filtration highlighted anomalies of resistant contact (greater than 400Ω.m) and of high charge chargeability (5mV / V). These contacts are hosted in less resistant Devonian age shale and sandstone. The resistivity response obtained at their level is characteristic of the venous structures associated with barite mineralization. The direction of the mineralized veins is parallel to the direction of the fractured zones (NE-SW), which indicates that the mineralization in place is due to the tectonic movements of the Hercynian orogeny (from Devonian to Permian). These veins are aligned with the locations of abandoned mine shafts and with surface mining areas. Geophysical technique therefore seems to play a key role in barite mining exploration.

• Analytical Science and Technology
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• v.30 no.5
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• pp.226-233
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• 2017

In general, quantitative chemical analysis in various areas including food, the environment, in vitro diagnostics, etc., requires traceability in order to increase the reliability of the measurements. Measurement traceability is a property of an unbroken chain of comparisons relating an instrument's measurements to SI units. Purity analysis is the first process for establishing traceability to SI units in chemical measurements. The purpose of this study is to develop and validate a method of purity assignment for establishing the traceability of $17{\beta}$-estradiol measurements in an in vitro diagnostics field. The establishment of this method is very important as it can be applied to the development of CRM and to the analysis of the purity of other hormones. The method of assignment of the purity of $17{\beta}$-estradiol was developed using the mass balance method and was validated through participation in an International comparison. In the mass balance method, impurities are categorized into four classes as follows: total related structure impurities, water, residual organic solvents, and nonvolatiles/inorganics. In this study, total related structure impurities were characterized by a gas chromatography-flame ionization detector (GC-FID) and a high-performance liquid chromatography-ultraviolet (HPLC-UV) detector, water content was determined by a Karl-Fisher coulometer, and total residual solvents and nonvolatiles/inorganics were checked simultaneously by thermogravimetric analysis (TGA). The purity of the $17{\beta}$-estradiol was 985.6 mg/g and the expanded uncertainty was 2.1 mg/g at 95% confidence. The developed method can be applied to the development of certified reference materials, which play a critical role in traceability.

• Journal of Fashion Business
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• v.8 no.2
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• pp.56-68
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• 2004

Korean fashion industry is not exceptional in terms of positive offense of multinationals and management circumstance of corporations which is changeful momentarily. Accelerated by continuous industry growth and particular policy to promote fashion industry, Korean fashion industry has been inflated quantitatively. In this paper the author presents a effective model which is applicable to the area of outsourcing in Korean men's wear industry incomplete and non-systematic. Studying and analyzing the state of outsourcing in other industries which use advanced outsourcing systems, the author suggests how to customize their advanced systems to men's wear industry. For the successful outsourcing, fashion brands have to recognize the specialized ability of outsourcing companies, go into partnership with them horizontally and concede their own value, not only for cost reduction. On the other hand, outsourcing companies should mediate between two parties, fashion brands and manufacturers, have the ability to create new designs, be able to present merchandises that fashion brands want, invest money in developing creative designs and new products which have good quality, and handle many manufactures specialized in their own areas to play an important role in mediating fashion brand sand manufactures. In this paper, the author tries to study forward direction of specialized outsourcing companies theoretically and is going to apply this theory to men's wear industry to make Korean fashion industry survive in international market successfully.

• The Journal of Korean Medicine
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• v.24 no.3
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• pp.72-83
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• 2003

Objective : The goal of the present study was to investigate the protective effect of Gamiheechum-tang (Jiaweixiqian-tang; GHCT) on brain tissue damage from chemical or ischemic insults. Methods : Levels of cultured cortical neuron death caused by toxic chemicals were measured by LDH release assay. Neuroprotective effects of GHCT on brain tissues were examined in vivo by ischemic model of middle cerebral artery (MCA) occlusion. Results : Animal groups treated with GBCT showed significantly decreased hypertension, and reduced levels of aldosterone, dopamine, and epinephrine in the plasma. GHCT treatments ($l0-200\mu\textrm{g}/ml$) significantly decreased cultured cortical neuron death mediated by AMPA, kainate, BSO, or Fe2+ when measured by LDH release assay. Yet, cell death mediated by NMDA was effectively protected by GHCT at the highest concentration examined ($200\mu\textrm{g}/ml$). In the in vivo experiment examining brain damage by MCA occlusion, affected brain areas by ischemic damage and edema were significantly less in animal groups administered with GHCT compared to the non-treated control group. Neurological examinations of forelimbs and hindlimbs showed that GHCT treatment improved animals' recovery from ischemic injury. Moreover, the extent of injury in cortical and hippocampal pyramidal neurons in ischemic rats was much reduced by GHCT, whose morphological features were similarly observed in non-ischemic animals. Conclusion : The present data suggest that GBCT may play an important role in protecting brain tissues from chemical or ischemic injuries.

• Journal of the Korean Society for Marine Environment & Energy
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• v.4 no.1
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• pp.14-23
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• 2001

The characteristics of tidal circulation with Hyungsan River discharges in Youngil Bay by the numerical experiments is elucidated. For the simulation of tidal residual currents related to inflow by the river discharges in Youngil Bay located in the southeastern part of Korean Peninsula, the two-dimensional numerical experiment is peformed. The tidal elevation boundary conditions of the 4 main tidal harmonic constituents (M₂, S₂, K₁ and O₁) on the open boundary and river discharges at the river boundary are considered. The computed results obtained from numerical experiment showed good agreements with the field observation ones. The residual currents generally flow toward the inner bay through the western (Dalman-Gap) and central areas of the bay, and then the currents go toward the outer bay along the eastern shore (Changgi-Gap) of the bay with anti-clockwise circulation. Especially, in the numerical experiment without Hyungsan River discharges, these flow patterns are disappeared. Based on the results, it showed that the Hyungsan River discharges play the dominant role in the patterns of tidal residual currents. This flow pattern of tidal residual currents are important mechanism of water quality, material transport in Youngil Bay.

• The Journal of Korean Association of Computer Education
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• v.12 no.5
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• pp.49-62
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• 2009

The Extra-Curriculum in The Air and Correspondence High School(ACHS), which play a role as an organization of lifelong learning, has not been operating properly for lack of appropriate circumstances and also educational research. So this research applied the Extra-Curriculum on-line contents to ACHS as an example to search for the effective operation solution in ACHS Extra-Curriculum, and derived the implications which are necessary to class operation. According to the implications which are obtained by the analysis of the application result, selected the five main areas in Blended-Learning which are necessary to the operation of ACHS Extra-Curriculum, and developed the direct instruction model by blending the teaching-learning method and strategy which is suitable for the ACHS Extra-Curriculum. Finally, based on these research results, this research developed the Blended-Learning Teaching Model for ACHS Extra-Curriculum by reflecting the peculiarity of ACHS student and characteristics of Extra-Curriculum contents.

• Journal of Family Resource Management and Policy Review
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• v.8 no.2
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• pp.61-84
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• 2004

This thesis attempted to generate ideal tea culture space that connects environment and culture. Therefore, this examines: First, history of tea and the characteristics of tea culture space from Gochosun to modern times was reviewed Second, psychological factors (spirit of tea) of Korea tea culture space were reviewed. Third, the connection between the concept of tea culture space and Human Ecosystem Model by was analyzed. Also, this thesis examined how the culture of ecosystem and why tea culture space is needed. because tea includes varieties of ingredients for protecting environmental pollution. Finally, tea culture spaces were reviewed each region during Chosun dynasty, and tea culture space of recent tea users. In order to study tea culture space, complex residential area and single residential areas were compared. The useful of tea culture space as a ecological space was also examined. To achieve the purpose of this study, related literatures were reviewed, and investigations of museums and a survey on modern living space were also conducted. The results show that the space of our tea culture were affected by nature worshipping of Gochosun, Buddhism of Koryo, and Confusianism of Chosun with 'Pungryu', the idea that enjoys nature, thereby applying environment-friendly ecological beauty to their living space and life. The cultyral space in Korea is composed of natural environment such as mountain, sea, rock, or trees and artificial environment such as pond or pavilion. In the future, oriental culture with metaphysical value will lead the world culture, and especially, tea culture would play an important role regardless of nationality, race, religion, and ideology. Therefore, establishing a tea culture space in a living space would be the fundamental methods that would be able to settle down such tea life into our daily life. Our attempts to create ecological tea culture space as a integrated cultural space of natural, artificial, and human behavioral environment will contribute to enhance our quality of life.

• Human Ecology Research
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• v.54 no.3
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• pp.263-278
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• 2016

Recently in South Korea, family-friendly living environment in resident communities have emerged as an important issue in addressing problems created by personalized and fragmented family in urban areas. Since their foundation in 2005, Healthy Family Support Centers provided a variety of community activities for both parents and children through the Co-Child Care Sharing Programs. That being said, it is certain that the Healthy Family Support Centers play a central role in making a family-friendly environment. This study surveyed the physical environment of the co-child care sharing space and suggested further improvement. The content of this survey represents the characteristics of co-child care sharing space in Incheon such as operation status, physical space, prepared facilities, and preference for facilities. This study also explored the field of two co-child sharing spaces (Bupyung-gu and Seo-gu) as an example case. The subject of this study was 14 co-child sharing spaces of nine Healthy Family Support Centers in Incheon investigated from July 2014 to October 2014. This study indicated three results: first, the size of the co-child care spaces, their composition and facilities are very different from each center and require standards and guidelines for the co-child sharing space in regards to physical space, composition, and facilities. Second, co-child sharing space should be provided with individual special programs and diversified activities in addition to playing activities. Third, many healthy family support centers operate over two co-child sharing spaces along with an out-located co-child sharing space that require mutual organizing and operational networking between each co-child sharing space to effectively share programs.

• Journal of the Korean Institute of Rural Architecture
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• v.19 no.4
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• pp.67-75
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• 2017

This paper overall and systematically investigates of basic design know-how on commonly indwelling timber framework in a folk house in Yeosu area. in other words, Setting the goal of 'investigates of common form of timber framework', and for this goal, surveyed and analyzed for folk house a lot of findable in Yeosu area. As a result, elicits for four types plural common form((1) 4 front 'kan' - a hipped roof construction - front 'toi'/3 'ryang' - no central pillar/side beam type, (2) 4 front 'kan' - a hipped roof construction - front 'toi'/3 'ryang' - one side central pillar/central side beam type, (3) 4 front 'kan' - a hipped roof construction - front/back 'toi'/2'kozu'5'ryang' - no central pillar/side beam type, (4) 4 front 'kan' - a hipped roof construction - front/back 'toi'/'2kozu'5'ryang' - one side central pillar/central side beam type). Common form is at that time, so commonly located in the head of the technician that a form that play an exemplary role in design, or it is concretely assumed for commonly aimed form. in other words, Common form is come into existence on premise for basic design data. Documentation of folk house design know-how is done through this, and the base design and specification of korean private house is written in the contents divided into by areas.

• Journal of the Korea Institute of Building Construction
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• v.20 no.1
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• pp.11-18
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• 2020

Carbon nanotubes are used in various industries with their excellent mechanical properties and electrical conductivity. In the construction industry, research is being conducted to give self-sensing capabilities to structures, but the results of experiments vary among researchers, and the analysis is insufficient. Therefore, in this study, the hydration and electrical properties of MWCNT-added cement pastes were measured. The electrical resistance values of hydration heat, porosity, Rietveld quantitative analysis, compressive strength, and distance were measured.. The heat resistance, porosity, Rietvelt quantitative analysis, compressive strength and distance were measured according to electrical resistance. Experimental results showed that the heat of hydration decreased with increasing MWCNT. XRD Rietveld quantitative analysis showed that there was no significant difference in the amount of hydration products with increasing addition rate of MWCNT. As a result of SEM analysis, the MWCNT is agglomerated by van der Waals forces, and this area is considered to be caused by voids and weak areas. The electrical resistance value decreases as the addition rate is increased, and thus may play a role for magnetic sensing in the future.