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Yanggu, South Korea

Park J.K.,Seoil College | Lee J.S.,Chungnam National University | Kim M.G.,Chungnam National University
International Journal of Control and Automation | Year: 2013

The demands for GPS have explosively increased in various areas such as geodetic survey, car navigation, geophysics and weather. But countless time and efforts are required to process GPS data so that automation of data processing is in definite need to solve this issue. Therefore this research had developed a console application which automatizes GPS data processing based on C# and Bernese 5.0. By generating favorable performance of GPS data processing test with deviations of 0.0140m in maximum in notification achievement latitude, longitude, and ellipsoidal height direction, this research suggested possibility of data processing automation though developed application. Source

Chi W.-J.,Myongji University | Oh E.A.,Myongji University | Kim J.-H.,Seoil College | Hong S.-K.,Myongji University
Biotechnology and Bioprocess Engineering | Year: 2011

Production of proteins in secretary form is one of the important factors affecting fermentation. The Tat (twin arginine translocation) protein secretion system, which includes the proteins TatA, TatB, and TatC, was identified in the genomic sequence of Streptomyces griseus IFO13350. The tatA and tatC genes were organized into a polycistronic operon, whereas tatB was located separately on the chromosome. Comparison of amino acid sequences suggested that TatC was a membrane-spanning protein, whereas TatA and TatB were found to be cytoplasmic proteins. Analysis of extracellular proteins and N-terminal amino acid sequencing revealed that secretion of SGR5556 was significantly enhanced by overexpression of TatAC in S. griseus HH1. Further, enzymatic study showed that SGR5556 encoded a glycerophosphoryl diester phosphodiesterase. In addition, other hydrolase activities, such as those of amylase, total protease, metalloprotease, trypsin, chymotrypsin, and Leuaminopeptidase, were also enhanced by 3, 3, 2.6, 2.3, 5.4, and 2.5 fold, respectively, in S. griseus upon TatAC overexpression. Overexpression of TatAC induced the production of a greenish-yellow pigment in S. griseus HH1 as well as more abundant sporulation at an earlier stage in Streptomyces coelicolor A3(2). In silico analysis by TatFIND, SignalP, and TMHMM identified 19 binding proteins, 28 enzymatic proteins, and 27 other proteins with unknown functions as putative TatAC-dependent secretary proteins. These results clearly indicate that TatA and TatC constitute a functional Tat system in S. griseus. Additionally, the S. griseus Tat system can be useful for the production of valuable proteins, including many hydrolytic enzymes and candidates of Tat-dependent secretary proteins, under industrial conditions. © The Korean Society for Biotechnology and Bioengineering and Springer 2011. Source

Lee K.,Dankook University | Lee S.-H.,Dankook University | Kim G.-C.,Seoil College | Woo S.-S.,Dankook University
Journal of Constructional Steel Research | Year: 2014

An abnormal vibration accident caused by human rhythmic excitations occurred in the upper floors of a 39 story steel building in Seoul, Korea. In this paper, the effects of human rhythmic excitations on the global vertical vibration of a high-rise steel building were evaluated. Experimental tests were conducted to measure the natural frequencies and the floor acceleration responses of the building. Also, using three-dimensional finite element model, the vertical natural frequency of the building was estimated by conducting modal analysis, and time history analyses were performed by applying the various human rhythmic excitations to the floor slab of a fitness center in the 12th floor of the building. The modal analysis results verified that the building has the global vertical vibration mode of 2.7 Hz natural frequency which was identified by experimental tests. The vertical accelerations of the floors resulting from the time history analyses also agreed very well with the experimental results. Finally, it was concluded that the resonance phenomenon between building structure and human rhythmic excitations with the step frequency of 2.7 Hz caused the abnormal vertical vibration accident of the building. © 2013 Elsevier Ltd. Source

Yi J.-H.,Seoil College
Communications in Computer and Information Science | Year: 2012

Brand is a concept like an equity which is continuously cultivated and accumulated for a long time. As the result of K-BPI supervised by KMAC, Morning Glory is at the top of high-royalty brand in the general category of consumer goods by taking the first for 11 years in succession, in the part of general stationary among the consumer goods' general parts. After extracting components of brand valuation, main characteristics of Morning Glory are arranged and current environment of brand is examined, so this study will be a guidance to establish the direction of brand policy. © 2012 Springer-Verlag Berlin Heidelberg. Source

Goo E.-H.,Seoil College | Lee S.-D.,Namseoul University
Communications in Computer and Information Science | Year: 2012

Encryption algorithms are used to protect data, but encrypted data depend on the safety of the key used in the encryption algorithm, so it is very important to generated a key that cannot be easily inferred for a safer protection of data. For this, in order to broaden the choice of keys used in encryption algorithm, this paper proposed the method to generate a key table by expanding the previously proposed elliptic curve algorithm to real number field, and the proposed method was applied to Android-based smartphone cryptosystem for verification. © 2012 Springer-Verlag. Source

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