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A Localized Multiquadric (MQ) Interpolation Method on the Hyperbolic Plane (하이퍼볼릭 평면에서의 지역적 MQ 보간법)

  • Park, Hwa-Jin
    • The KIPS Transactions:PartA
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    • v.8A no.4
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    • pp.489-498
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    • 2001
  • A new method for local control of arbitrary scattered data interpolation in the hyperbolic plane is developed in this paper. The issue associated with local control is very critical in the interactive in the interactive design field. Especially the suggested method in this paper could be effectively applied to the interactive shape modeling of genus-N objects, which are constructed on the hyperbolic plane. Since the effects of the changed data affects only the limited area around itself, it is more convenient for end-users to design a genus-N object interactively. Therefore, by improving the global interpolation on the hyperbolic plane where the genus-N object is constructed, this research is aiming at the development and implementation of the local interpolation on the hyperbolic plane. It is implemented using the following process. First, for localizing the interpolating functions, the hyperbolic domain is tessellated into arbitrary triangle patches and the group of adjacent triangle patches of each data point is defined as a sub-domain. On each sub-domain, a weight function is defined. Last, by blending of three weight functions on the overlapped triangles, local MQ interpolation is completed. Consequently, it is compared with the global MQ interpolation using several sample data and functions.

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Phylogenetic Diversity and Antibacterial Activity of Bacteria from Shindari of Jeju Traditional Fermented Food (제주 전통 발효식품 쉰다리에서 분리한 세균의 군집 조사 및 어류질병세균과 인체유해세균에 대한 항균활성효과)

  • Ryu, Young-Soo;Heo, Moon-Soo
    • Journal of Life Science
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    • v.31 no.1
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    • pp.73-82
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    • 2021
  • Throughout history, barley was the typical crop of the soils of Jeju Island due to its topographical features. People in Jeju eat Shindari or Dansul. Shindari or Dansul is a fermented drink of Jeju, made from the leftovers of cooked barely and nuruk of short fermentation periods. Although Makgeolli and Shindari share a similar fermentation period and materials, research on Shindari or Dansul is still in its early stages. In this study, we examined major bacterial species of Shindari or Dansul. In addition, we confirmed the antibacterial activities of an isolated strain against fish and human-harmful bacteria. Among the isolates, Firmicutes consisted of 73% and the Proteobacteria of 27%, indicating that the Firmicutes phylum was the dominant one. In addition, the Pediococcus genus and the Bacillus genus were the most prevalent consisting of 25%, followed by the Cronobacter genus (25%), the Enterococcus genus (16%), the Aneurinibacillus genus (5%), the Klebsiella genus (4%), and the Paenibacillus genus (2%). We conclude that the Lactobacillus genus predominated in Makgeolli, but the Pediococcus genus predominated in Shindari. In a study of the antibacterial activity, growth inhibition was observed for all bacteria, except for the fish disease bacterium Photobacterium damselae subsp. piscicida and the human-harmful bacterium Streptococcus mutans.

Pseudostomella Gastrotrichs (Macrodasyida, Thaumastodermatidae) from South Korea, with o Brief Review of the Genus

  • Lee, Ji-Min;Chang, Cheon-Young
    • Animal cells and systems
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    • v.6 no.3
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    • pp.207-213
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    • 2002
  • Two new marine gastrotrichs of the genus Pseudostomella, P. longifurca and P. koreana, are described from the shallow sublittoral sand bottoms of South Korea. Pseudostomella longifurca n. sp. is characterized by the cuticular armature with tetrancres, five dorsal papillae on the prebuccal apparatus, four dorsolateral adhesive tubes, and elongated pedicle. Pseudostomella koreana n. sp. is distinguished from its congeners by the small body, tetrancres, two pairs of dorsolateral adhesive tubes, and tube-shaped copulatory organ. A brief review of the genus is prepared, with the character comparison table for all congeners currently recognized, and a revised key to the species of Pseudostomella. This is the first record of the genus Pseudostomella from East Asia.

Two Aquatic Oligochaete Species, Dero dorsalis and Allonais pectinata (Annelida: Clitellata: Naididae), New to Korea

  • Lee, Jeounghee;Jung, Jongwoo
    • Animal Systematics, Evolution and Diversity
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    • v.30 no.2
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    • pp.119-123
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    • 2014
  • The genera Dero and Allonais belong to the family Naididae. Most species in the genus Dero have unique morphological characters including a branchial fossa and/or gills at the posterior end of the body. The genus Allonais has no eyes unlike its close relative the genus Nais. Of these genera, one species of Dero, D. obtusa, was recently reported in Korea. However, the genus Allonais has not been recorded in Korea. Here, we report Dero dorsalis Ferroni$\grave{e}$re, 1899 and Allonais pectinata (Stephenson, 1910) with a diagnosis and illustrations.

Review of the Palaearctic Trathala Species (Hymenoptera: Ichneumonidae: Cremastinae)

  • Choi, Jin-Kyung;Kolarov, Janko;Kang, Gyu-Won;Lee, Jong-Wook
    • Animal Systematics, Evolution and Diversity
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    • v.30 no.4
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    • pp.327-333
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    • 2014
  • The Palaearctic species of the genus Trathala Cameron are reviewed. Genus Trathala is the third largest group. This genus was described Trathala striata by Cameron for the first time in the world. One hundred one species of this genus have been recorded worldwide. Trathala flavoorbitalis Cameron and Trathala hierochontica (Schmiedeknecht) were recorded from Palaearctic. Here we report three species, Trathala flavoorbitalis Cameron, Trathala hierochontica (Schmiedeknecht) and Trathala striata Cameron, from Palaearctic region. Among them, Trathala striata Cameron is a newly recorded species for the first time from Palaearctic region and South Korea. Redescriptions of Palaearctic Tranthala species with photographs and a key to the Palaearctic Trathala species are provided.

A Taxonomic Revision of the Genus Periophthalmus (Pisces : Gobiidae) from Korea with Description of a New Species (한국산 말뚝망둥어속(屬) 어류의 분류학적 재검토 및 1신종)

  • Lee, Yong-Joo;Choi, Youn;Ryu, Bong-Suk
    • Korean Journal of Ichthyology
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    • v.7 no.2
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    • pp.120-127
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    • 1995
  • The taxonomic revision of the genus Periophthalmus from Korea was made based on the fish specimens collected in the southern and western coasts of Korea from September 1983 to October 1994. The genus Periophthalmus in Korea was classified into two species : P. modestus and P. magnuspinnatus n. sp. P. magnuspinnatus differs from all other species of the genus by ventral fin united about two - third the fin and first dorsal fin relatively large, convex, distinct black submarginal band.

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New Report on Two Species of the Genus Nipponomysis (Crustacea: Mysida: Mysidae) from Korean Waters

  • Kim, Mijin;Song, Sung Joon;Kim, Won
    • Animal Systematics, Evolution and Diversity
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    • v.31 no.1
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    • pp.15-21
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    • 2015
  • Two species of mysid, Nipponomysis fusca (Ii, 1936) and N. tenuiculus (Ii, 1940), are newly recorded in Korean fauna. These two species were collected using a light or a bait trap from all coasts of the Korean peninsula. The genus Nipponomysis can be distinguished from allied genus by the following morphological characteristics: third to eighth thoracic endopods with carpopropodus divided into five to six subsegments compared to three subsegments, and anterior four pairs of pleopod in female subequal in length and fifth pair elongated. Nipponomysis fusca is characterized by its acute rostral plate and armature of telson, and N. tenuiculus differs from other species by the number of spine in ventral statocyst region and the shape of the fourth pleopod in male. Herein, we present detailed descriptions of two species from Korean waters with illustrations of morphology. In addition, an identification key to the Korean species of the genus is provided.

First Record of the Subcortical Beetle Genus Bitoma (Coleoptera: Zopheridae) in Korea

  • Lee, Seung-Gyu;Lim, Jongok
    • Animal Systematics, Evolution and Diversity
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    • v.34 no.1
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    • pp.60-63
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    • 2018
  • The family Zopheridae Solier consist of members from several previous families, Zopherinae Solier, Monommatinae Blanchard and Colydiinae Erichson, and more than 1,700 described species are placed in the Zopheridae. They are widely distributed in all major biogeographical regions. The zopheridine genus Bitoma Herbst comprise more than 30 species worldwide including four Palaearctic species. A taxonomic study of the genus Bitoma in Korea is presented. The genus Bitoma and its two species, B. crenata (Fabricius) and B. siccana (Pascoe), are new to the Korean Peninsula. A key, diagnoses, habitus photographs, and illustrations of aedeagus of the Korean Bitoma species are provided.

Yeasts in the Flowers of Wild Fleabane [Erigeron annus (L.) Pers.]

  • Kim, Jong-Shik;Kim, Dae-Shin
    • Korean Journal of Environmental Agriculture
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    • v.34 no.3
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    • pp.238-243
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    • 2015
  • BACKGROUND: Yeasts associated with fleabane flowers were identified using isolation methods previously applied in yeast biotechnology. A culture-based approach was required for isolation of many yeast strains associated with fleabane. METHODS AND RESULTS: We spread homogenized fleabane flowers onto GPY medium containing chloramphenicol, streptomycin, Triton X-100, and L-sorbose. We isolated 79 yeast strains from the flowers of wild fleabane, and identified the yeasts via phylogenetic analysis of isolates from agar plates. The yeast species included 39 isolates of Aureobasidium pullulans, 17 of the genus Candida, 14 of the genus Rhodosporidium, 6 of the genus Cryptococcus, and 3 of the genus Rhodotorula. CONCLUSION: Yeast isolates associated with fleabane flowers included A. pullulans (39 isolates) and other yeast species (40 isolates). Such yeast isolates may have biotechnological potential.

A Taxonomic Review of the Genus Myzia (Coleoptera: Coccinellidae: Coccinellinae) from Korea

  • Lee, Mi Jin;Lee, Jong Eun
    • Animal Systematics, Evolution and Diversity
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    • v.31 no.2
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    • pp.114-117
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    • 2015
  • The taxonomic study of the genus Myzia Mulsant, 1846 in Korea is presented. The genus Myzia contains five species worldwide and two species currently recognized in Palaearctic region. Until now, only M. oblongoguttata (Linnaeus, 1758) has been known in Korea, but we found M. gebleri (Crotch, 1874) for the first time in Korea. We redescribed these two Korean species of the genus Myzia with photographs of the habitus and detailed illustrations of their aedeagus and other appendages. A taxonomic key to the species of Korean Myzia beetles are also provided.