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Seoul, South Korea

Sejong University is a private university located in Seoul, South Korea. The history of Sejong University dates to 1940 when a trust established the Kyung Sung Humanities Institute. In 1978, the academy was named Sejong University in honor of Sejong the Great, the fourth king of the Chosun Dynasty and overseer of the Korean alphabet Hangeul.Sejong University has nine colleges: College of Liberal Arts, College of Social science, College of Business Administration, College of Hospitality and Tourism Management, College of Natural science, College of Life science, College of Electronics and Information Engineering, College of Engineering, and College of Arts and Physical Education, and has a Faculty of General Education and seven graduate schools.Sejong University is known for its standing in hotel management, animation and rhythmic gymnastics. The College of Arts and Physical Education and the College of Hospitality and Tourism Management are top ranked in the country. Wikipedia.

Induced pluripotent stem cell (iPSC) technology has shown us great hope to treat various human diseases which have been known as untreatable and further endows personalized medicine for future therapy without ethical issues and immunological rejection which embryonic stem cell (hES) treatment has faced. It has been agreed that iPSCs knowledge can be harnessed from disease modeling which mimics human pathological development rather than trials utilizing conventional rodent and cell lines. Now, we can routinely generate iPSC from patient specific cell sources, such as skin fibroblast, hair follicle cells, patient blood samples and even urine containing small amount of epithelial cells. iPSC has both similarity and dissimilarity to hES. iPSC is similar enough to regenerate tissue and even full organism be generated. This makes iPSC even better choice to perform disease modeling as well as cell based therapy. Tissue memory containing iPSC from mature leukocytes would be beneficial for curing cancer and infectious disease. In this review, the benefit of iPSC for translational approaches will be presented. © 2014 Korean Society of Hematology.

Appropriate guidelines for controls in B2C (business-to-consumer) applications (hereafter B2C controls) should be provided such that these guidelines accomplish efficiency of controls in the context of specific system environments, given that many resources and skills are required for the implementation of such controls. This study uses a two-step process for the assessment of B2C controls, i.e., efficiency analysis and recommendation of controls. First, using a data envelopment analysis (DEA) model, the study analyzes the efficiency of B2C controls installed by three groups of organizations: financial firms, retail firms, and information service providers. The B2C controls are composed of controls for system continuity, access controls, and communication controls. DEA model uses B2C controls as input and three variables of implementation of B2C applications, i.e., volume, sophistication, and information contents as output. Second, decision trees are used to determine efficient firms and generate rules for recommending levels of controls. The results of the investigation of the DEA model indicate that retail firms and information service providers implement B2C controls more efficiently than financial firms do. Controls for system continuity are implemented more efficiently than access controls. In financial firms, controls for system continuity, communication controls, and access controls, in a descending order, are efficiently adopted in B2C applications. Every company can determine its relative level of reduction in each component of controls in order to make the control system efficient. The firms that efficiently implement B2C controls are determined using a decision tree model. The decision tree model is further used to recommend the level of controls and suggest rules for controls recommendation. This suggests the possibility of using decision trees for controls assessment in B2C applications. © 2010 Elsevier B.V. All rights reserved.

Kyung K.H.,Sejong University
Current Opinion in Biotechnology | Year: 2012

The antimicrobial activity of Allium species has long been recognized, with allicin, other thiosulfinates, and their transformation products having antimicrobial activity. Alliums are inhibitory against all tested microorganisms such as bacteria, fungi, viruses, and parasites. Alliums inhibit multi-drug-resistant microorganisms and often work synergistically with common antimicrobials. Allium-derived antimicrobial compounds inhibit microorganisms by reacting with the sulfhydryl (SH) groups of cellular proteins. It used to be thought that allicin reacts only with cysteine and not with non-SH amino acids, but evidence has accumulated that allicin and other thiosulfinates also react with non-SH amino acids. © 2011 Elsevier Ltd.

Metal-insulator-silicon-insulator-metal (MISIM) waveguides are proposed and investigated theoretically. They are hybrid plasmonic waveguides, and light is highly confined to the insulator between the metal and silicon. As compared to previous ones, they are advantageous since they may be realized in a simple way by using current standard CMOS technology and their insulator is easily replaceable without affecting the metal and silicon. First, their structure and fabrication process are explained, both of which are compatible with standard CMOS technology. Then, the characteristics of the single MISIM waveguide whose insulator has its original or an adjusted refractive index are analyzed. The analysis demonstrates that its characteristics are comparable to those of previous hybrid plasmonic waveguides and that they are very effectively tuned by changing the refractive index of the insulator. Finally, the characteristics of the two coupled MISIM waveguides are analyzed. Through the analysis, it is obtained how close or far apart they are for efficient power transfer or low crosstalk. MISIM-waveguide-based devices may play an important role in connecting Si-based photonic and electronic circuits. © 2011 Optical Society of America.

Kim K.-Y.,Sejong University
Optics Letters | Year: 2014

By considering the transverse spin angular momentum (SAM) that results from the rotation of the electric-field component of a surface mode as a longitudinal SAM of an elliptically polarized light propagating through a homogeneous medium, an alternate route to deriving the formula of the Abraham SAM carried by the surface mode can be achieved. The findings prove in an explicit manner that it is the Abraham SAM that is directly related to the rotation of the electric field. © 2014 Optical Society of America.

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