• Analytical Science and Technology
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• 제22권6호
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• pp.464-470
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• 2009

For the investigation of the oxidation behavior for titanium metal at various temperatures, titanium specimens were heated for 2 hours in the range of $300{\sim}1000^{\circ}C$, individually. And then X-ray diffraction(XRD), scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS) and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopic analyses were carried out. At $300^{\circ}C$, infrared absorption bands on the surface of the titanium specimen were shown in a spectrum by the oxygen uptake of titanium metal(hexagonal). At increased temperature, not only infrared absorption bands but also X-ray diffraction peaks for the titanium oxide were grown and shifted to low wave number ($cm^{-1}$) and angle($^{\circ}$) due to the more oxygen diffusion into titanium metal. At $700^{\circ}C$, $Ti_3O$ (hexagonal phase) was identified by X-ray diffractometer. $TiO_2$ (rutile, tetragonal phase) layer was produced on the surface of the specimen below $1{\mu}m$ in thickness at $600^{\circ}C$, and grown about $2{\mu}m$ at $700^{\circ}C$ and with $110{\mu}m$ in thickness at $1000^{\circ}C$. Above $900^{\circ}C$, (110) plane of the crystal on the surface of rutile-$TiO_2$ layer was grown.

• Analytical Science and Technology
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• 제21권4호
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• pp.326-331
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• 2008

Distribution coefficients (Kd) of uranyl ion onto divinylbenzene amidoxime resins were measured in sodium carbonate solution and the Kd values were increased up to about 70 as the resin bead size was decreased. At a condition of 0.0044 M $Na_2CO_3$, the adsorption capacity for uranium was $3.4{\mu}mole$ U/g-resin. The Kd values in the 0.5 M $Na_2CO_3-NaHCO_3$ solution, ranging from pH 9 to pH 11, revealed that they were increased as the pH increased and revealed lower values than those in the pure sodium carbonate solution. The amidoxime resins were characterized by FTIR-ATR showing the absorption bands of the amidoxime functional groups. A species of the uranyltricarbonate complex, $UO_2(CO_3)_3^{-4}$, was confirmed by UV-Vis spectroscopy, revealing four absorption peaks between 400 and 500 nm. Uranium was separated from some fission products by a column operation. However, most of the uranium and fission products were eluted before an adsorption and only a small amount of uranium was adsorbed onto the resin due to the low capacity of the resin.

• Analytical Science and Technology
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• 제22권5호
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• pp.395-406
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• 2009

The determination of iodine in the spent nuclear fuel and the volatile behavior during its acid dissolution have been studied by NAA(neutron activation analysis) and electron probe microanalysis (EPMA). Simulated spent fuels (SIMFUELs) were dissolved in $HNO_3$(1+1) at $90^{\circ}C$ for 8 hours. The iodine remained in a dissolver solution after dissolution, and that condensed in dissolution apparatus and trapped in the adsorbent by volatilization during the dissolution were determined, respectively. The condensed iodine was recovered by the redistillation with $HNO_3$(1+1) after transfer of the dissolver solution. The iodines in the dissolver and redistilled solution were separated by solvent extraction followed by ion exchange or precipitation method and determined by RNAA (radiochemical neutron activation analysis). The ion exchange column and filtration kit used for the isolation of iodine, which were prepared with a polyethylene tube, were used as an insert in the pneumatic tube for neutron irradiation. The iodine volatilized during the dissolution of SIMFUELs was collected in a trapping tube containing Ag-silica gel (Ag-impregnated silica gel) adsorbent, and the distribution of iodine trapped in the adsorbents were determined by EPMA. The adsorbing characteristics shown with the SIMFUELs were compared with those shown with a real spent fuel from the nuclear power plant.

• Korean Journal of Culture and Social Issue
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• 제23권2호
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• pp.159-181
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• 2017

The current study is the first attempt to review the [Korean Journal of Psychology: Culture and Social Issues] systematically. For the past 22 years from 1994 to 2015, 464 articles have been published in the Journal. We analyzed the 337 empirical research articles, with respect to their objectives, predictor and outcome variables, and their methodologies. Most of the studies dealt with variables at individual level; some dealt with variables of the community and socio-cutural environment level. Many of the studies included general population, not necessarily social minorities. The results were compared with the literature on the social issues that Koreans perceive as social issues. Also it is noteworthy that many studies failed to specify such demographic characteristics as age, gender, and locality of their participants in the articles. Based on the analysis results, we discussed the roles of psychology and of the Journal in the contemporary Korean context.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• 제36권4호
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• pp.30-50
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• 2023

Objectives : To investigate the active compounds and therapeutic mechanisms of Atractylodes Lancea(Thunb.) D.C. and Magnolia Officinalis Rehder et Wilson in the treatment of dermatitis accompanied by pruritus, as well as their potential to complement or replace standard drugs. Methods : We conducted the network pharmacological analysis. We selected effective ingredients among the active compounds of research target herbs. Then we explore pathway/terms of the common target proteins among research target herbs, fexofenadine and disease. Results : We selected 9 active compounds are selected from Atractylodes lancea and identified 231 target proteins. Among them, 74 proteins are associated with inflammatory skin diseases that cause pruritus. These proteins are involved in various pathways including, 'Nitric-oxide synthase regulator activity', 'Hydroperoxy icosatetraenoate dehydratase activity, Aromatase activity', 'RNA-directed DNA polymerase activity', 'Arachidonic acid metabolism', 'Peptide hormone processing', 'Chemokine binding' and 'Sterol biosynthetic process'. Additionally, coregenes are involved in 'IL-17 signaling pathway'. Similarly, we selected 2 active compounds from Magnolia officinalis and identified 133 target proteins. Among them, 33 proteins are related to inflammatory skin diseases that cause pruritus. These proteins are primarily involved in 'Vascular associated smooth muscle cell proliferation' and 'Arachidonic acid metabolism'. There is no significant difference between the pathways in which coregenes are involved. Conclusions : It is expected that Atractylodes Lancea will be able to show direct or indirect anti-pruritus and anti-inflammatory effects on skin inflammation accompanied pruritus through suppressing inflammation and protecting skin barrier. Meanwhile, it is expected that Magnolia Officinalis will only be able to show indirect anti-inflammation effects. Therefore, Atractylodes Lancea and fexofenadine are believed to complement each other, whereas Magnolia Officialinalis is expected to provide supplementary support on skin disease.

• Korean Association of Arts Management
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• 제50호
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• pp.177-212
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• 2019

In an effort to understand the global standing of artists from Japan, China, and Korea, this article presents an analytic study of data from auctions, notable international contemporary art galleries, notable international art museums, contemporary art biennials, and the Venice Biennales' award. We also look at select art exhibitions as they have been covered by international art magazines to analyze the geography of international contemporary art. Our analysis of international art magazines shows that the global position of the three Asian countries we consider is low in comparison with select Western countries. Auction data, on the other hand, reveals that Chinese and Japanese artists are highly regarded in economic terms, while the visibility of Japanese artists is emphasized in the data we consider from art biennials. In the permanent exhibitions and contemporary art biennales we look at, we note that the visibility of Chinese artists is much higher than that of Japanese and Korean artists, who also demonstrate remarkable visibility. We find that Korean artists represent an important presence in our analysis of the Venice Biennale awards, with Japanese and Chinese artists holding noteworthy positions. Through these myriad criteria, we develop a clear idea of the nature of the global position of artists from Japan, China, and Korea. The Asian art world can profit from these findings by considering them when developing strategies for managing the growth of its artists on the international contemporary art scene.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• 제37권2호
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• pp.1-13
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• 2024

Objectives : The purpose of this study is to figure out the changes in sex, age, disease distribution of outpatients in ophthalmology and otolaryngology of Korean medicine. Methods : We analyzed the medical records of 2,834 outpatients who visited department of ophthalmology and otolaryngology of Korean medicine at Kyung Hee university Korean medicine hospital between 2018 and 2022. And we compared the results with those of studies from 2000, 2007, and 2017, considering sex, age, and diseases. Results : 1. The total number of patients in ophthalmology and otolaryngology increased compared to 2012-2016, with a higher proportion of patients aged 50 and above in all departments. 2. The number of patients in ophthalmology has been continuously decreasing since 1996-1998. 3. The number of patients in otology has increased significantly compared to 2012-2016, with a trend towards a lower proportion of tinnitus and hearing loss. 4. The number of patients in rhinology has not recovered from the significant decrease in 2012-2016, and rhinitis continues to constitute a significant proportion. 5. The number of patients in laryngology has increased significantly compared to 2012-2016, with a trend towards a less proportion of laryngopharyngitis. Conclusion : The active utilization of diagnostic equipment, further research and promotion of Korean medicine treatment for ophthalmology and otholaryngology diseases are essential for expanding the treatment domain within ophthalmology and otolaryngology of Korean medicine.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• 제37권3호
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• pp.17-28
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• 2024

Objectives : The aim of this study is to explore the potential of oriental medicine in managing rosacea through the regulation of the autonomic nervous system. Methods : We reviewed studies on the pathophysiology and medical treatment (both western and oriental medicine) of rosacea, as well as the relationship between rosacea and the autonomic nervous system, using four databases: PubMed, OASIS, RISS, and NDSL. Results : Rosacea is a chronic recurrent inflammatory disease characterized by symptoms such as facial flushing, inflammatory papules, and pustules. In Western medicine, symptomatic treatments like vasoconstrictors, doxycycline, and anti-inflammatory drugs are primarily used. According to the pathophysiological mechanisms of rosacea, the autonomic nervous system is closely related, particularly with sympathetic overactivity causing vasodilation and local inflammation in rosacea patients. Additionally, recent studies report that rosacea patients frequently exhibit neuropsychiatric symptoms such as anxiety, depression, and insomnia, which are closely linked to autonomic dysfunction and contribute to the worsening of skin symptoms. However, current studies on the use of oriental medicine for rosacea focus mainly on anti-inflammatory effects at the local level, similar to conventional treatments. Conclusions : Based on the close involvement of the autonomic nervous system in the pathophysiological mechanisms of rosacea and numerous studies showing that oriental medicine can effectively regulate autonomic function, applying such treatments to rosacea patients may improve not only skin symptoms but also the frequently associated neuropsychiatric symptoms like anxiety, depression and insomnia.

• Journal of Christian Education in Korea
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• 제78권
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• pp.87-110
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• 2024

The purpose of this study is to explore the educational philosophy that is the basis for the establishment of Christian alternative schools and the curriculum that is the standard for educational practice accordingly, and to understand in depth the educational philosophy and curriculum, what characteristics are common in each type in the school field. This study also explored the main factors that lead to educational practice in the curriculum. In order to explore these research questions, this study was conducted using interview that is one of the qualitative studies. The subjects of this study are 16 teachers selected from the three types of Christian alternative schools that exist in Korea. Based on our findings and discussion, this study was presented several suggestions. First, in the reality that parents are sending their children to alternative schools for their faith, school leaders and teachers must practice sincere faith education with deep reflection. Second, in order for Christian alternative schools to fulfill their responsibilities as schools and continue to provide a valuable education, it is necessary to integrate Christian worldviews and academics through cooperation with allied organizations. Third, in order to reduce the burden of parents' excessive educational expenses, there should be a civic effort to request financial support from the nation at least for school operating expenses.

• Journal of Gastric Cancer
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• 제9권2호
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• pp.57-62
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• 2009

Purpose: The use of automatic circular staplers for gastroduodenostomy after distal gastrectomy is now widely accepted. We compared the clinical outcomes of two different methods. Materials and Methods: Between March 2005 and February 2008, 134 patients with gastric cancer underwent distal gastrectomies. Seventy-six consecutive patients received end-to-side gastroduodenostomies (ES) between March 2005 and September 2006. The remaining 58 consecutive patients received end-to-end gastroduodenostomies (EE) between November 2006 and February 2008. We analyzed the surgical outcomes between the two groups (ES versus EE) on the basis of prospectively collected data. Results: Among the clinical factors, there were no differences between the two groups. The overall complication rates were 19.7% in the ES group and 13.8% in the EE group (P=0.489). With respect to anastomosis-related complications, 2 cases had bleeding and 2 cases had stenoses in the ES group, while 2 cases in the EE group had bleeding. Re-operation was needed in the case of intraluminal bleeding in the ES group. There were no mortalities in our study. Conclusion: The two methods for gastroduodenostomy were safe and technically feasible. Although there was no statistical difference in the overall complications, including anastomosis-related complications, we demonstrated better outcomes with respect to anastomotic stenosis in the EE group.