International University of Korea is a private university located in Jinju, South Korea. It is located 5 miles east of Jinju.Established in 1978 and later as Jinjun International University, the post secondary institution was renamed the current named in 2008.The university is made up of seven colleges and 27 departments with total enrollment at 5,000.IUK offers studies in Korean and English attracting mostly students from Asia as well as from Australia, Canada, United States and Turkey. Wikipedia.
Park B.-S.,International University of Korea |
Kim W.Y.,Kyungpook National University |
Yoon K.-B.,Kyungpook National University
Korean Journal of Chemical Engineering | Year: 2014
Coumarin was reacted with polyamic acid to form a luminous polyimide that is highly soluble in organic solvents and displays good thermal stability. Luminous side-chain coumarin 6 polyimide was obtained from incorporation of sulfonated coumarin 6 into polyamic acid. This polymer appeared in reddish brown solids and unusually exhibited a fairly strong visible light-emission of a yellowish green color. Fluorescence image patterning of side-chain coumarin 6 polyimide was successfully conducted by microtransfer molding of the polyamic acid and the subsequent thermal treatment for imidization. The polyimides exhibit high fluorescence, opening the possibility of new applications for these polymers. © 2013 Korean Institute of Chemical Engineers, Seoul, Korea.
Park B.-S.,International University of Korea |
Song J.C.,Kyungpook National University |
Park D.H.,Kyungpook National University |
Yoon K.-B.,Kyungpook National University
Journal of Applied Polymer Science | Year: 2012
Melt blending of polylactic acid (PLA) and a chain-extended polyethylene glycol (CE-PEG) have been performed in an effort to toughen the PLA without significant loss of modulus and ultimate tensile strength. The chain-extended PEG was prepared with melt condensation of a low molecular weight PEG and 4,4′-methylenebis(phenylisocyanate) (MDI) for enhancement of the molecular weight of PEG. The thermal and mechanical properties, miscibility and phase morphologies of blends were investigated. By using thermal and fracture surface analysis, the blends were found to be a partially miscible system with shifted glass transition temperatures. The addition of CE-PEG leads to slight decrease in tensile strength and modulus, while the elongation at break is characterized by an important increase (540%), compared with neat PLA and PLA/PEG (low molecular weight PEG, M n = 35,000). The relative ductility of PLA/CE-PEG is 40 times higher than that of neat PLA. The brittle fracture of neat PLA was transformed into a ductile fracture by the addition of CE-PEG. © 2011 Wiley Periodicals, Inc.
Shin J.I.,Gyeongsang National University |
Chung K.H.,Gyeongsang National University |
Oh J.S.,International University of Korea |
Lee C.W.,Hanyang University
International Journal of Information Management | Year: 2013
We performed a study to determine the influence that site quality has on repurchase intention of Internet shopping through customer satisfaction, customer trust, and customer commitment. Appropriate measures were developed and tested on 230 university students of Gyeongnam province in South Korea with a cross-sectional questionnaire survey. The results of the empirical analysis confirmed that site quality can be conceptualized as a composite of six dimensions of shopping convenience, site design, information usefulness, transaction security, payment system, and customer communication. Second, site quality positively affected customer satisfaction and customer trust, but did not affect customer commitment and repurchase intention. Third, site quality can affect repurchase intention by enhancing or attenuating customer satisfaction, customer trust, and customer commitment in online transaction situation. The mediating effect of customer satisfaction, customer trust, and customer commitment between site quality and repurchase intention is identified. Fourth, site quality indirectly affected customer commitment through customer satisfaction. Customer satisfaction indirectly affected repurchase intention through customer trust and customer commitment. Thus, it is found that site quality can be a very important factor to enhance repurchase intention in the customer perspective. © 2013 Elsevier Ltd.
Bae S.-H.,Cheongam College |
Kim G.-D.,International University of Korea |
Kim K.-Y.,Dongshin University
Tohoku Journal of Experimental Medicine | Year: 2014
Pain that occurs after a stroke lowers the quality of life. Such post-stroke pain is caused in part by the brain lesion itself, called central post-stroke pain. We investigated the analgesic effects of transcranial direct current stimulation (tDCS) in stroke patients through quantitative sensory testing. Fourteen participants with central post-stroke pain (7 female and 7 male subjects) were recruited and were allocated to either tDCS (n = 7) or sham-tDCS (n = 7) group. Their ages ranged from 45 to 55 years. tDCS was administered for 20 min at a 2-mA current intensity, with anodal stimulations were performed at primary motor cortex. The sham-tDCS group was stimulated 30-second current carrying time. Both group interventions were given for 3 days per week, for a period of 3 weeks. Subjective pain was measured using the visual analogue scale (VAS) of 0 to 10. Sensations of cold and warmth, and pain from cold and heat were quantified to examine analgesic effects. The sham-tDCS group showed no statistically significant differences in time. In contrast, tDCS group showed decreased VAS scores and skin temperature (p < 0.05). The threshold temperatures for the sense of cold and pain from cold increased (p < 0.05), and those for the sense of warmth and pain from heat decreased (p < 0.05). Our findings indicate that tDCS improved sensory identification and exerted analgesic effects in the stroke patients with central post-stroke pain. © 2014 Tohoku University Medical Press.
Do M.T.,Chungnam National University |
Hwang Y.P.,Chungnam National University |
Hwang Y.P.,International University of Korea |
Kim H.G.,Chungnam National University |
And 2 more authors.
Journal of Cellular Physiology | Year: 2013
Mollugin is a naphthohydroquine found in the roots of Rubia cordifolia, and has been reported to have a variety of biological activities, including anti-inflammatory and apoptotic effects. In the present study, we investigated the molecular mechanisms by which mollugin exerts anti-tumor effect in HER2-overexpressing cancer cells. Our results showed that mollugin exhibited potent inhibitory effects on cancer cell proliferation, especially in HER2-overexpressing SK-BR-3 human breast cancer cells and SK-OV-3 human ovarian cancer cells in a dose- and time-dependent manner without affecting immortalized normal mammary epithelial cell line MCF-10A. Furthermore, we found that a blockade of Akt/SREBP-1c signaling through mollugin treatment significantly reduced FAS expression and subsequently suppressed cell proliferation and induced apoptosis in HER2-overexpressing cancer cells. Mollugin treatment caused a dose-dependent inhibition of HER2 gene expression at the transcriptional level, potentially in part through suppression of NF-κB activation. The combination of mollugin with a MEK1/2 inhibitor may be required in order to achieve optimal efficacy in HER2-overexpressing cancers. These data provide evidence that mollugin inhibits proliferation and induces apoptosis in HER2-overexpressing cancer cells by blocking expression of the FAS gene through modulation of a HER2/Akt/SREBP-1c signaling pathway. Our findings suggest that mollugin is a novel modulator of the HER2 pathway in HER2-overexpressing cancer cells with a potential role in the treatment and prevention of human breast and ovarian cancer with HER2 overexpression. J. Cell. Physiol. © 2012 Wiley Periodicals, Inc.
Hwang Y.P.,Chungnam National University |
Choi J.H.,Chungnam National University |
Choi J.M.,International University of Korea |
Chung Y.C.,International University of Korea |
Jeong H.G.,Chungnam National University
Food and Chemical Toxicology | Year: 2011
Anthocyanins have been shown to exert anti-proliferative, anti-inflammatory effects and anti-carcinogenic activity. In the present work, we investigated the protective effects of anthocyanin fraction (AF) from purple sweet potato on tert-butyl hydroperoxide (t-BHP)-induced hepatotoxicity in HepG2 cell line and in rat liver. The result showed that the oral pretreatment of AF before t-BHP treatment significantly lowered the serum levels of the hepatic enzyme markers (ALT and AST) and reduced oxidative stress of the liver by evaluation of malondialdehyde and glutathione. Histopathological evaluation of the livers also revealed that AF reduced the incidence of liver lesions. The in vitro result showed that AF significantly reduced t-BHP-induced oxidative injury, as determined by cell cytotoxicity, intracellular glutathione content, lipid peroxidation, reactive oxygen species (ROS) levels, and caspases activation. Also, AF up-regulated antioxidant enzymes including heme oxygenase-1 (HO-1), NAD(P)H:quinone reductase, and glutathione S-transferase. Moreover, AF induced Nrf2 nuclear translocation and Akt and ERK1/2 activation, pathways that are involved in inducing Nrf2 nuclear translocation. Taken together, these results suggest that the protective effects of AF against t-BHP-induced hepatotoxicity may, at least in part, be due to its ability to scavenge ROS and to regulate the antioxidant enzyme HO-1 via the Akt and ERK1/2/Nrf2 signaling pathways. © 2011 Elsevier Ltd.
Ahn D.,International University of Korea |
Shin D.-H.,Seoul National University
Computers in Human Behavior | Year: 2013
This study provides a resolution for two contrasting hypotheses around media use, the augmentation and the displacement hypotheses. To do this, we conducted an online survey of 300 Korean adults examining the relationships among the social use of media, face-to-face communication, social isolation, connectedness, and subjective well-being. The results indicate that connectedness, not avoiding social isolation, mediates the effects of the social use of media on subjective well-being. On the other hand, both connectedness and avoiding social isolation mediate the effects of face-to-face communication on subjective well-being. These results suggest that the social use of media is limited to seeking connectedness to others, whereas face-to-face communication can facilitate avoiding social isolation as well as seeking connectedness, which can explain why the two contrasting hypothesis, the augmentation and the displacement hypotheses, can be right. In the domain of seeking connectedness, media can augment face-to-face communication. On the other hand, in the domain of avoiding social isolation, media may displace face-to-face communication. © 2013 Elsevier Ltd. All rights reserved.
Syamsuddin I.,State Polytechnic of Ujung Pandang |
Hwang J.,International University of Korea
Journal of Software | Year: 2010
In this paper, we introduce a framework to guide decision makers evaluating information security policy performance. It is motivated by lack of adequate decision making mechanism with broader scopes and easy to use for the decision makers. The framework, which adopts Analytic hierarchy Process (AHP) methodology, is developed into a four level hierarchy (goal, criteria, sub-criteria, and alternatives) representing different aspects of information security policy. A survey based on AHP methodology was conducted to obtain decision maker preferences. Instead of relying on dedicated AHP software, we prefer to clearly demonstrate the process of AHP calculations by using Open Office Calc in data analysis. The aims are to show the applicability of open source software in handling AHP decision making problem and to help decision makers in understanding AHP data analysis procedures without relying on proprietary software. Results show that decision makers prefer availability of information security as highest priority, followed by confidentiality and integrity. The findings reflect future strategy in order to improve the effectiveness of information security policy in the organization. © 2010 Academy Publisher.
Park Y.-H.,International University of Korea
Journal of the Korean Chemical Society | Year: 2016
Mt. Jiri located in the southwestern part of Korea is a treasure trove of wild medicinal plants. More than 1200 species currently classified as herbs are grown or cultivated in the area. Recently, safflower has attracted interest because of its ability to control fine wrinkle formation on the neck. The objective of this study therefore was to determine whether the active ingredient of safflower could be used in the form of an extract to reduce wrinkle formation in individuals aged 30 to 59 years. In particular, this study was aimed at determining the extract's elastase activity and anti-oxidant effect by using DPPH assay in vitro and evaluating the anti-wrinkle efficacy of different types of safflower extracts in improving fine wrinkles on the neck. This study will provide a basis for future studies to develop safflower extracts using advanced composition technology and contribute to the development of the herbal cosmetics industry. © 2016, Korean Chemical Society. All rights reserved.
Lee Y.H.,International University of Korea
Ocean and Polar Research | Year: 2010
The Korean Government is trying to construct an ocean research station in Dokdo's water. The station would be the third ocean research station following the Ieodo station and the Gageocho station. Although the new station would served as a scientific research base for peaceful and academic purposes, the construction of the station will almost certainly lead to a diplomatic dispute between Japan and Korea in the near future due to the disputed ownership of the island. In light of the diplomatic protests against the construction of the Ieodo station by the Chinese Government, various domestic and international legal issues which could be raised regarding the construction of the Dokdo station need to be reviewed. Therefore, this article reviews the international legal status of the station and the rights and duties pertaining to its construction, investigates the domestic legal grounds relating to the construction and operation of the marine scientific installation, evaluates the international legal impacts of the construction on the expansion of maritime jurisdiction, the effective control on Dokdo and the negotiations on maritime boundary delimitation, and finally draws conclusions on the future activities of the Korean Government for the construction and operation of the Dokdo Ocean Research Station.