• Journal of the Mineralogical Society of Korea
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• v.4 no.2
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• pp.69-89
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• 1991

The anorthositic rocks and the many other plutons which are of different varieties and age were distributed in the northern extremity of the distributed areas of H-S anorthositic rocks. The purpose of this study was to find plutons which had comagmatic relationships, and to make clear the magmatic process of anorthositic magma. The plutons were classified, and the petrological and the geochemical characteristics of the plutons were compared and researched in this study. And, because, like anorthosite, the rocks which intrude in the deep crust accompany assimilation, an AFC model calculation was performed to make the differentiation process of the anorthositic rocks clear. The plutons in this area were classified into three groups, and the three groups were composed of the Precambrian anorthositic rocks and related rocks, the Jurassic gabbro, and the plutons of undnown age. The anorthositic magma was differentiated from the anorthositic rocks through the tonalite to the alkali-feldspar granite, and it was differentiated under K, Mg, Fe free/lack condition. It was found from the result of AFC model that the anorthositic rocks were differentiated by fractional crystallization, but they were assimilated with wall-rocks, and the assimilation was performed at the rate of r$\leq$0.1. The plutons which intruded the anorthositic rocks subsequently consisted of the gabbro, the megacrystic granite, the fine-grained granite, and the gneissose granite. But they were formed by the repeated intrusion of magma, which may, or may not, be of the same origin. According to the result of the RCF model, these plutons were differentiated by simple fractional crystallization, and they were assimilated relatively less than the anorthositic rocks.

• Journal of the Korea Convergence Society
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• v.8 no.9
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• pp.199-209
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• 2017

This study was carried out to confirm a convergent research pattern and researchers' role in stem cell sector by social network analysis. Articles were extracted from 1996 to 2012 in PubMed, 515 authors of 270 embryonic stem cell and induced pluripotent stem cell articles and 1,515 authors of 580 adult stem cell and mesenchymal stem cell articles. Degree(D) and betweenness(B) centrality was measured and co-author network was generated for researcher's role. As a result, Core researcher and Intermediary researcher was identified in co-author network. Core researcher had high D. centrality, otherwise high B. centrality or not. Intermediary researcher for convergent research had high B. centrality and low D. centrality. Conclusively, co-author network will be used as objective data not only to find core researchers in subject area for improving achievement but also to select experts for research project evaluation.

• Journal of the Korean Ceramic Society
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• v.40 no.11
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• pp.1090-1095
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• 2003

In this paper, the modeling and design of high-Q multilayer passives and multilayer diplexer for GSM/DCS applications designed and fabricated using these passives have been investigated.. To miniaturize the system, configurations of inductor and capacitor have involved a square spiral structure and a vertically-interdigitated capacitor similar to 3D interdigital structure, respectively. Multilayer diplexers for GSM/DCS applications were designed and fabricated to apply high-Q multilayer passives to practical systems, which were designed by the proposed structural and equivalent circuit model. LPF for GSM band had the passband insertion loss of less than 0.55 dB, the return loss of more than 12 dB, and the isolation level of more than 26 dB by locating attenuation pole at 1800 MHz. HPF for DCS band had the passband insertion loss of less than 0.82 dB, the return loss of more than 11 dB, and the isolation level of more than 38 dB by locating attenuation pole at 930 MHz.

• The Korean Journal of Pain
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• v.20 no.2
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• pp.148-153
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• 2007

Background: Complex regional pain syndrome (CRPS) is not regarded as an impairment in Korea. Guidelines for rating this impairment are under development by the Korean Academy of Medical Science based on that of the American Medical Association (AMA). However, no studies have been done on the validity of these guidelines in Korea. We therefore evaluated the validity of these guidelines using the criteria from the chapter on the central and peripheral nervous system (CNS-PNS class) and the worksheet for calculating total pain-related impairment score (TPRIS class). Methods: TPRIS and CNS-PNS classes were calculated through interviews of 28 CRPS patients. The correlation between the two classes was calculated. Results: TPRIS class and CNS-PNS class were well correlated (r = 0.593, P < 0.05). Conclusions: Both TPRIS or CNS-PNS classes were well correlated and could be used for evaluation of impairment. However, the CNS-PNS class is simpler and quicker to complete.

• Journal of Educational Research in Mathematics
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• v.24 no.3
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• pp.409-428
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• 2014

The purpose of this study is to examine the features of the curriculum of Chosun-Sanhak(朝鮮算學), the mathematics of Chosun Dynasty in the 17th to 18th century. The results of this study are as follows. First, the goal of education, teaching-learning method and assessment of Chosun-Sanhak in the 17th to 18th century had not changed since the 15th century. Second, the changes in the field of the organization of mathematical contents were observed. Chosun-Sanhak in that time was higher in the hierarchy than in the 15th to 16th century. The share of the equation and geometry had increased and various topics of mathematics had been studied as well. Third, in the field of the characteristics of mathematical contents, the influx of European mathematics and the uniqueness of Chosun-Sanhak had been observed. In conclusion, The 17th to 18th century was the time when Chosun-Sanhak had pursued the identity escaping from the effects of Chinese-Sanhak.

• Transactions of the Korean Society of Automotive Engineers
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• v.14 no.5
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• pp.73-78
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• 2006

In this paper, creep tests of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys, which were casted by mold with Mg-3%Zn-1%Mn and Mg-3%Zn-1%Mn-0.2%Ca, were done under the temperature range of 473-573K and the stress range of 23.42-78.00Mpa. The activation energies and the stress exponents were measured to investigate the creep plastic deformation of those alloys, and the rupture lifes of Mg-Zn-Mn alloy were also measured to investigate the fracture behavior. From the results, the activation energy of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys under the temperature range of 473-493K were measured as 149.87, 145.98KJ/mol, respectively, and the stress exponent were measured as 5.13, 6.06 respectively. Also the activation energies Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys under the temperature range of 553-573K were obtained as 134.41, 129.22KJ/mol, respectively, and tress exponent were obtained as 3.48, 4.63, respectively. Finally stress dependence of rupture life and the activation energy of rupture life of Mg-Zn-Mn under the temperature range of 473-493K was measured as 8.05, 170.0(KJ/mol), respectively, which were a little higher than the results of steady state creep.

• The Korean Journal of Archival Studies
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• no.65
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• pp.7-46
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• 2020

Since the launch of the Moon Jae-in government in May 2017, the records and archives community hoped to overcome the delays in records and archives management over the past nine years and to pursue record and archives management innovation. This article focuses on the record and archives management innovation that the National Archives of Korea has been pursuing in the public records and archives management sector for about 3 years until the first half of 2020, and evaluates the progress and contents focusing on the main agent, innovation plan, revision of laws, and major events.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.325-331
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• 2016

This research developed a flood fragility curve of bridges considering the debris impacts. Damage and failures of civil infrastructure due to natural disasters can cause casualties as well as social and economic losses. Fragility analysis is an effective tool to help better understand the vulnerability of a structure to possible extreme events, such as earthquakes and floods. In particular, flood-induced failures of bridges are relatively common in Korea, because of the mountainous regions and summer concentrated rainfall. The main failure reasons during floods are reported to be debris impact and scour; however, research regarding debris impacts is considered challenging due to various uncertainties that affect the failure probability. This study introduces a fragility analysis methodology for evaluating the structural vulnerability due to debris impacts during floods. The proposed method describes how the essential components in fragility analysis are considered, including limit-state function, intensity measure of the debris impact, and finite element model. A numerical example of the proposed fragility analysis is presented using a bridge pier system under a debris impact.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.18 no.3
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• pp.1-17
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• 2005

In many recent studies, molecular biological methods have been used to investigate the role of cytokines in pathogenesis of lung disease. This Experiment was conducted to investigate the effects of Sochungyong-tang on gene expressions in Mouse Alveolar Macrophage. Fer this purpose, we observed the cytokines ($IL-1{\beta}$, IL-6, IL-10, iNOS, $MIP-1{\alpha},\;MIP-1{\beta},\;MIP-1{\gamma},\;TGF-{\beta},\;TNF-{\alpha}$). We picked the alveolar macrophage out of mice and cultured it. We analyzed the cytokine gene expression by reverse transcription-PCR. The results obtained were as follows : 1 . Sochungyong-tang showed inhibitory effects on $IL-1{\beta}$ in time and concentration. 2. Sochungyong-tang showed inhibitory effects on IL-6 in time and concentration. 3. Sochungyong-tang showed inhibitory effects on IL-10 in concentration. 4. Sochungyong-tang showed inhibitory effects on iNOS. 5. Sochungyong-tang showed inhibitory effects on $TGF-{\beta}$ in time and concentration. 6. Sochungyong-tang showed on inhibitory effects on $MIP-1{\alpha},\;MIP-1{\beta},\;MIP-1{\gamma}$, $TCF-{\beta}$, $TNF-{\alpha}$. According to above results, it is supposed that Sochungyong-tang has the inhibitory effects on cytokine gene expression in mouse alveolar macrophage and can be usefully applied for curing inflammatory process of lung disease. Advanced studies are required to investigate the cure mechanism of Sochungyong-tang in the future.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.18 no.3
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• pp.18-25
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• 2005

Objectives: It has a growing interest in the prevention and medical treatment of allergic rhinitis. According to many studies, it's known that Sinicheongpye-um has the inhibitory effect on the allergic rhinitis. We have studied effect of the mice on OVA-induced Production of IL-4, IL-5, $Interferone-{\gamma}$ by Murine Splenocytes and effect of OVA-induced Total IgE. Methods: Mixing Ovalbumin(OVA) $10{\mu}g$ into PBS(phoshate buffered saline) and $Al(OH)_3$, gel solution and changing into $1\;m{\ell}$, we made it into OVA solution. That was administered to normal group. After the last administration into abdominal cavity, we caused allergic rhinitis in nasal cavity of mouse of control group and sample group administering 0.1% solution dropwise 3 times a day for 7 days. Keeping separated serum at -20 degree and after refloating spleen cells, cultivating the cells and centrifuging the upper liquid and keeping it at -20 degree, we measured the amount of IL-4. IL-5, $Interferone-{\gamma}$ and OVA-induced Total IgE by ELISA. Results: 1. In Total IgE, Sinichengpae-um treated group was proved significant inhibitory effect.(p<0.05) 2. In IL-4 study, Sinichengpae-um treated group was proved significant inhibitory effect.(p<0.005) 3. In IL-4 study, Sinichengpae-um treated group was proved significant inhibitory effect.(p<0.001) 4. In $Interferone-{\gamma}$ study, Sinichengpae-um treated group showed a increasing tendency. Conclusion: Based on the above result, it is considered that Sinichengpae-um has the inhibitory effect on the allergic rhinitis of mice and suggested thai it could be used in relieving patients of the symptoms which are caused by allergic rhinitis.