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Lensed photonic crystal fiber obtained by use of an arc discharge.
Kong, Gyeong-Jun,Kim, Jinchae,Choi, Hae-Young,Im, Joo Eun,Park, Byung-Hyuk,Paek, Un-Chul,Lee, Byeong Ha Optical Society of America 2006 Optics letters Vol.31 No.7
<P>A lensed photonic crystal fiber (PCF) is proposed as an effective element for an optical free-space interconnector. By simultaneously forming a beam-expansion region and a focusing lens on a single piece of PCF, effective coupling between PCFs could be achieved. A long working distance of up to 1 mm with wide longitudinal and lateral tolerances was measured. The optical characteristics of the lensed PCFs and the connectors made from them are analyzed experimentally and theoretically.</P>
( Hyoung-un Yoon ),( Young-geun Eom ),( Jong-young Park ),( Young-to Kong ) 한국목재공학회 1998 목재공학 Vol.26 No.2
A new device that uses turbulent air for mixing wood fibers with thermoplastic fibers was designed and its mixing effectiveness was evaluated in wood fiber and polypropylene fiber composites. Composites made by the turbulent air mixing (TAM) process performed better than composites made by the conventional Rando-Webber forming or nonwoven web process with an additional needling step. Thus, the TAM process proved to be a simple and efficient method in mixing wood fibers with short thermoplastic fibers for the production of wood fiber and thermoplastic fiber composites.
Park, Young-Jin,Jeong, Yong-Un,Kong, Won-Sik MDPI 2018 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.19 No.8
<P>Next-generation sequencing (NGS) of the <I>Flammulina elastica</I> (wood-rotting basidiomycete) genome was performed to identify carbohydrate-active enzymes (CAZymes). The resulting assembly (31 kmer) revealed a total length of 35,045,521 bp (49.7% GC content). Using the AUGUSTUS tool, 12,536 total gene structures were predicted by ab initio gene prediction. An analysis of orthologs revealed that 6806 groups contained at least one <I>F. elastica</I> protein. Among the 12,536 predicted genes, <I>F. elastica</I> contained 24 species-specific genes, of which 17 genes were paralogous. CAZymes are divided into five classes: glycoside hydrolases (GHs), carbohydrate esterases (CEs), polysaccharide lyases (PLs), glycosyltransferases (GTs), and auxiliary activities (AA). In the present study, annotation of the predicted amino acid sequences from <I>F. elastica</I> genes using the dbCAN CAZyme database revealed 508 CAZymes, including 82 AAs, 218 GHs, 89 GTs, 18 PLs, 59 CEs, and 42 carbohydrate binding modules in the <I>F. elastica</I> genome. Although the CAZyme repertoire of <I>F. elastica</I> was similar to those of other fungal species, the total number of GTs in <I>F. elastica</I> was larger than those of other basidiomycetes. This genome information elucidates newly identified wood-degrading machinery in <I>F. elastica</I>, offers opportunities to better understand this fungus, and presents possibilities for more detailed studies on lignocellulosic biomass degradation that may lead to future biotechnological and industrial applications.</P>