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Random Accessible Mesh Compression Using Mesh Chartification
Sungyul Choe,Junho Kim,Haeyoung Lee,Seungyong Lee IEEE 2009 IEEE transactions on visualization and computer gr Vol.15 No.1
<P>Previous mesh compression techniques provide decent properties such as high compression ratio, progressive decoding, and out-of-core processing. However, only a few of them supports the random accessibility in decoding, which enables the details of any specific part to be available without decoding other parts. This paper proposes an effective framework for the random accessibility of mesh compression. The key component of the framework is a wire-net mesh constructed from a chartification of the given mesh. Charts are compressed separately for random access to mesh parts and a wire-net mesh provides an indexing and stitching structure for the compressed charts. Experimental results show that random accessibility can be achieved with competent compression ratio, which is only a little worse than single-rate and comparable to progressive encoding. To demonstrate the merits of the framework, we apply it to process huge meshes in an out-of-core manner, such as out-of-core rendering and out-of-core editing.</P>
Sungyul Lee Korean Chemical Society 1992 Bulletin of the Korean Chemical Society Vol.13 No.5
An approximate scheme for evaluating total reaction probability is proposed. Semiclassical boundary conditions are imposed well before the asymptotic region in the reactant and product channels to calculate the Green's function and its derivatives. Propagations are confined to a limited regime near the activated complex. Calculations are made for one dimensional Eckart barrier model of H + $H_2$ reaction. Implications of the procedure in multi-dimensional systems are discussed.
Sungyul Chang,Eun-Hee Soh,Chee Hark Harn,Hyoung Seok Kim 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Anthocyanin is known for positive health beneficial effects that including reduces age related oxidative stress and inflammatory responses. It was produced by vegetable crops and a lettuce is one of the crops. The general pathway of anthocyanin expression is well defined but it is not clear how environments effects on anthocyanin accumulation in a lettuce. Therefore we initiated to study interaction between anthocyanin expression and environment factors. Frist, we applied RGB leaf images in a lettuce to calculate anthocyanin areas in a leaflet with two different cultivars, different developmental stages, and different environments. Later, we attempted to capture RNA expression level with next generation sequence (NGS) RNA sequencing method called RNA-seq. As a result, combined two technologies showed that quantitate phenotypic data help to understand the gene expression of anthocyanin in lettuce cultivars.
Computational Study of Proline - Water Cluster
Sungyul Lee,Sung-Woo Park,In-Sun Jeon,Bo-Ra Lee,Doo-Sik Ahn,Kyung-Min Lee 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.6
Calculations are presented for the structures of various conformers of the bare proline and proline – (H2O) cluster. The effects of hydrogen bonding with a water molecule on the relative stability of the low energy conformers of proline are examined. Microsolvation by a water molecule is predicted to affect the relative stability, structures and the infrared frequencies of the conformers to a large degree.