Naju, South Korea
Naju, South Korea

Dongshin University is a private university in southwestern South Korea. Its campus is located in Naju, a city in South Jeolla province which borders Gwangju. It enrolls about 7,000 students; the class of 2003 contained 1,378 students . The current president is Kyun-Bum Lee. Wikipedia.

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Dongshin University and Storytech Inc. | Date: 2014-05-19

Disclosed is a portable electronic moxibustion therapy device which can be conveniently carried after being charged by a user to provide the effects of conventional moxibustion treatment anywhere and anytime, and which can maximize the effects of moxibustion treatment by directly applying heat stimulation while being near but not in direct contact with an acupuncture point to be treated and simultaneously providing an indirect thermal effect continuously to the surrounding area and the area around the acupuncture point to be treated. The portable electronic moxibustion therapy device according to the present invention comprises: an upper main body including a battery and a control circuit unit provided therein, and separate the skin from the bottom end of the funnel portion.

Choi D.-Y.,Chungbuk National University | Lee Y.-J.,Chungbuk National University | Hong J.T.,Chungbuk National University | Lee H.-J.,Dongshin University
Brain Research Bulletin | Year: 2012

Alzheimer's disease (AD) is the most prevalent neurodegenerative disease and most common cause of dementia. However, there is no known way to halt or cure the neurodegenerative disease. Oxidative stress is a cardinal hallmark of the disease and has been considered as therapeutic target for AD treatment. Several factors may contribute to oxidative stress in AD brains. First, mitochondrion is a key player that produces reactive oxygen species (ROS). Mitochondrial dysfunction found in AD patients may exaggerate generation of ROS and oxidative stress. Second, amyloid-beta peptide generates ROS in the presence of metal ions such as Fe 2+ and Cu 2+. Third, activated glial cells in AD brains may produce excessive amount of superoxide and nitric oxide through NADPH oxidase and inducible nitric oxide synthase, respectively. Increased ROS can cause damage to protein, lipid and nucleic acids. Numerous studies demonstrated that natural polyphenolic compounds protect against various neurotoxic insults in vitro and in vivo AD models. In these studies, dietary polyphenolic compounds exhibit neuroprotective effects through scavenging free radicals and increasing antioxidant capacity. Furthermore, they could facilitate the endogenous antioxidant system by stimulating transcription. Some epidemiological and clinical studies highlighted their therapeutic potential for AD treatment. In this review, we will briefly discuss causes of oxidative stress in AD brains, and describe antioxidant neuroprotective effects and therapeutic potential for AD of selected natural polyphenolic compounds. © 2011 Elsevier Inc..

Oxidative skin damage and skin inflammation play key roles in the pathogenesis of skin-related diseases. Fisetin is a naturally occurring flavonoid abundantly found in several vegetables and fruits. Fisetin has been shown to exert various positive biological effects, such as anti-cancer, anti-proliferative, neuroprotective and anti-oxidative effects. In this study, we investigate the skin protective effects and anti-inflammatory properties of fisetin in hydrogen peroxide- and TNF-α-challenged human keratinocyte HaCaT cells. When HaCaT cells were treated with non-cytotoxic concentrations of fisetin (1-20 μM), heme oxygenase (HO)-1 mRNA and protein expression increased in a dose-dependent manner. Furthermore, fisetin dose-dependently increased cell viability and reduced ROS production in hydrogen peroxide-treated HaCaT cells. Fisetin also inhibited the production of NO, PGE2 IL-1β, IL-6, expression of iNOS and COX-2, and activation of NF-κB in HaCaT cells treated with TNF-α. Fisetin induced Nrf2 translocation to the nuclei. HO-1 siRNA transient transfection reversed the effects of fisetin on cytoprotection, ROS reduction, NO, PGE2, IL-1β, IL-6, and TNF-α production, and NF-κB DNA-binding activity. Moreover, fisetin increased Akt phosphorylation and a PI3K pathway inhibitor (LY294002) abolished fisetin-induced cytoprotection and NO inhibition. Taken together, these results provide evidence for a beneficial role of fisetin in skin therapy © 2015 Published by Elsevier B.V..

Kim D.-M.,Dongshin University | Kim J.-O.,Hanyang University
IEEE Transactions on Smart Grid | Year: 2012

This paper presents an innovative approach to formulate a customer-oriented demand response (DR) program in the electricity market using the analytic hierarchy process (AHP). AHP could represent the mutual importance degrees of load reduction criteria from the various viewpoints of load-holders. Thus, the proposed DR program (DRP) could provide the reasonable decision-support process for load-holders, because the participation or nonparticipation is determined by the incentive payments corresponding to the specific load reduction conditions. The proposed DRP has the objective to maintain the system reliability at the emergency period, and it is designed as an incentive-based program (IBP) considering the real-time and by-directional operation. The modified IEEE 24-bus system for the case study is used to demonstrate the usefulness and applicability of the proposed approach, and the load profiles with the proposed DRP and the required incentive payments are obtained. The results show not only the enhancement to the system reliability but also the economic benefits within Pareto-improvement. © 2012 IEEE.

Yun Y.-H.,Dongshin University | Nam S.M.,Kwangwoon University
Ceramics International | Year: 2011

Mixed-conducting oxide powders, BaCe 0.9Y 0.1O 2.95 (BCY) and SrCe 0.9Y 0.1O 2.95 (SCY), were prepared using a solid-state reaction method. X-ray diffraction patterns of the prepared powders showed the sharp peaks of the BaCe 0.9Y 0.1O 2.95 and SrCe 0.9Y 0.1O 2.95 phases. XRD patterns and FE-SEM morphologies of the oxide powders, fabricated by attrition milling and ball milling, were compared. The oxide powders that were prepared by attrition milling showed rather large particles and severe necking between particles in FE-SEM images as well as residual reactant (BaCO 3) and secondary phases (SrCeO 3 and CeO 2) in XRD patterns. The oxide powders prepared using ball milling showed particles under approximately 500 nm and typical XRD patterns of the BaCe 0.9Y 0.1O 2.95 and SrCe 0.9Y 0.1O 2.95 phases. Ceramic membranes of the BaCe 0.9Y 0.1O 2.95 and SrCe 0.9Y 0.1O 2.95 phases were fabricated by the aerosol deposition method using the oxide powders synthesized. Two fabricated ceramic membranes demonstrated somewhat dense morphologies and relatively fine grains in the FE-SEM surface images. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Cho H.,Pusan National University | Yun Y.-H.,Dongshin University
Ceramics International | Year: 2011

Indium tin oxide (ITO) thin films were prepared by a sol-gel spin coating method, fired, and then annealed in the temperature range of 450-600°. The XRD patterns of the thin films indicated the main peak of the (2 2 2) plane and showed a higher degree of crystallinity with an increase in the annealing temperature. Upon annealing the films at 500 and 600°, two binding energy levels of Sn4+ ion of 486.9 eV and 486.6 eV, respectively, were measured in the XPS spectra. The ITO film that was annealed at 600° contained two oxidation states of Sn, Sn2+ and Sn4+, and it had a higher sheet resistance based on a rather low doping concentration of Sn4+. The film that was annealed at 500° and subsequently treated with 0.1 N HCl solution for 40 s showed a sheet resistance of 225 Ω/square. The surface treatment by the acidic solution diminished the RMS (root mean square) roughness value and the residual carbon content (XPS peak intensity of carbon) of the ITO films. It seems that the acid-cleaning of the ITO thin films led to a decrease of the surface roughness and sheet resistance. © 2010 Elsevier Ltd and Techna Group S.r.l.

Cheon M.-W.,Dongshin University
Transactions on Electrical and Electronic Materials | Year: 2015

In this study, a basic research on artificial liver was performed for its application to people on the waiting list of liver transplant or patients with hepatic insufficiency. Artificial livers are generally classified into mechanic type, bioartificial type, and hybrid type. An extracorporeal circulation device was examined herein, which is indispensable in the application of an artificial liver, for its effectiveness in supporting the recovery of liver functions. Extracorporeal circulation system is a treatment and life-support system which sends out the patient’s blood, removes toxicity by various methods, and then sends the blood back to the interior of the body. This study used an extracorporeal circulation system which enables the Plasma Perfusion by CVVH method, and applied the program of Bioateco corp. Animals with acute hepatic insufficiency were produced to apply the extracorporeal circulation device. As a result, their ammonia, bilirubin, SGOT, SGPT, and bile acid levels rose, confirming the liver function restoration in the experimental animals. © 2015 KIEEME. All rights reserved.

The effects of electropolishing and coating deposition on electrical resistance and chemical stability were studied for the stainless steel bipolar plates in proton exchange membrane fuel cell (PEMFC). A series of 316L stainless steel plates, selected as the substrate for a proton exchange membrane fuel cell (PEMFC) bipolar plate, were electropolished with a solution of H2SO4 and H3PO4 at temperatures ranging from 70 to 110 °C. The surface regions of the two electropolished stainless steel plates were coated with gold and either a titanium or nickel layer using electron beam evaporation. The electropolished stainless steel plates coated in 2-μm thick gold with a 0.1-μm titanium or nickel interlayer showed remarkably smooth and uniform surface morphologies in AFM and FE-SEM images compared to the surfaces of the plates that were coated after mechanical polishing only. The electrical resistance and water contact angle of the deposited stainless steel bipolar plates are strongly dependent on the surface modification treatments (i.e., mechanical polishing versus electropolishing). ICP-MS and XPS results indicate that after electropolishing, the coating layers show excellent chemical stability after exposure to an H2SO4 solution of pH 3. Finally, it was concluded that before coating deposition, the surface modification using electropolishing was very suitable for enhancing the electrical property and chemical stability of the stainless steel bipolar plate. © 2009 Professor T. Nejat Veziroglu.

This article reports the optimized experimental requirements to determine neutrino mass hierarchy using electron antineutrinos (ν-e) generated in a nuclear reactor. The features of the neutrino mass hierarchy can be extracted from the |δm312| and |δm322| oscillations by applying the Fourier sine and cosine transforms to the L/E spectrum. To determine the neutrino mass hierarchy above 90% probability, the requirements on the energy resolution as a function of the baseline are studied at sin22θ13=0.1. If the energy resolution of the neutrino detector is less than 0.04/Eν and the determination probability obtained from Bayes' theorem is above 90%, the detector needs to be located around 48-53 km from the reactor(s) to measure the energy spectrum of ν-e. These results will be helpful for setting up an experiment to determine the neutrino mass hierarchy, which is an important problem in neutrino physics. © 2015 The Author.

Kang S.-H.,Dongshin University
2015 5th International Conference on IT Convergence and Security, ICITCS 2015 - Proceedings | Year: 2015

The performance of network intrusion detection systems based on machine learning techniques largely depends on the selected features. However, choosing the optimal subset of features from a given feature set requires extensive computing resources. To tackle this problem we propose an optimal feature selection algorithm based on a local search algorithm. In order to evaluate the performance of our proposed algorithm, comparisons with a feature set composed of all 41 features are carried out over the NSL-KDD data set using a multi-layer perceptron. © 2015 IEEE.

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