• Animal Systematics, Evolution and Diversity
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• v.6 no.2
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• pp.173-192
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• 1990

A taxonomic review of four Myotis species (M. formosus tsuensis , M. macrodactylus, M. daubentonii ussuriensis and M. nattereri bombinus) belonging to the Vespertilionidae was carried out. based on the external and skeletal (cranium, mandible and humerus ) morphology. The queston whether M. nattereri inhabiting Korea and eastern Siberia is a good separate subspecies (M. nattereri amurensis ) or a synonym of M. nattereri bombinus has remained unsolved. Through a detaile dexaminatin of Koreaan and Japanese speciemens, the author follows the concept of Wallin (1969) who has regarded M. nattereri amurensis as a synonym for M. nattereri bombinus.

• Korean Journal of Plant Resources
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• v.13 no.1
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• pp.66-79
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• 2000

Anatomical characters such as stem, leaf, ovary, calyx lobe, ultrastructure of stigma, epidermis of leaf blade and midvein, corolla lobe, nectary, seed coat and pollen were examined on 6 taxa of Korean Ophelia, including 5 taxa distributed in south Korea and one taxon considered to be the variation type of Ophelia wilfordi, in order to clarify the limits of intersection and interspecies and to establish the taxonomic position. One taxon distributed in north Korea was also included in the description of species by observation of herbarium specimen of the University of Tokyo in Japan. The two sections were successfully distinguished by internal structure of ovary, morphology of nectary, surface sculpturing of corolla lobe and pollen, ultrastructure of seed and seed coat, which were useful characters to distinguish taxa higher than species. The variation type of Ophelia wilfordi was not distinguished with other species except for absent or present of purple spot in corolla lobe.

• Korean Journal of Plant Taxonomy
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• v.48 no.3
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• pp.163-171
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• 2018

In Korea, Hypodematium glanduloso-pilosum was formerly known as the only Korean native species in the genus. Recently, however, we reported one unrecorded taxon, H. squamuloso-pilosum Ching, which was found on rocks at a limestone mountain in Yeongwol, along with one new taxon, H. angustifolium in Okcheon. Traditionally, Hypodematium taxa are often distinguished from each other by vegetative characters such as pinnatifid lamina, glandular hairs, and narrower or linear lanceolate scales on stipe bases. H. glanduloso-pilosum, distributed widely throughout the country except on Jejudo Island in Korea, exhibiting variations in leaf segregation, indusia positions, hair distributions and size. The high variation in the morphological characters in the widely distributed taxon has caused problems delimitating three native species from each other. To evaluate the phylogenetic relationships among H. glanduloso-pilosum and taxa related to Hypodematium (all Korean native taxa), we carried out morphological and molecular analyses (cpDNA rbcL and psbA-trnH) of populations of the genus Hypodematium in Korea. Although H. glanduloso-pilosum exhibits high variations in some morphological characters, the species is characterized by stipes and indusia with densely multicellular hairs and rod-shaped glandular hairs or hairs and lanceolate or oblong lanceolate scales in rhizomes and stipe bases distinguished from those of other Korean native taxa (H. squamuloso-pilosum and H. angustifolium). In the analyses of cpDNA data, three Korean native taxa are placed in the same clade, i.e., in the glanduloso-pilosum group. Moreover, our analyses propose that H. squamuloso-pilosum (China and Korea), H. angustifolium (Korea), and H. fordii (China and Japan) share the same glanduloso-pilosum clade with H. glandulosopilosum (China, Korea, and Japan).

• Korean Journal of Ichthyology
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• v.10 no.2
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• pp.216-230
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• 1998

The taxonomic review of the family Platycephalidae from Korea was made based on the morphological characteristics of specimens collected in the Korean coasts from December 1987 to April 1998. The family Platycephalidae from Korea was classified into 10 species belonging to 7 genera: Onigocia macrolepis, O. spinosa, Rogadius asper, Suggrundus meerdervoorti, lnegocia japonica, I. guttata, Cociella crocodila, Ratabulus megacephalus, Platycephalus indicus and Platycephalus sp. Of them, Onigocia macrolepis was recorded for the first time in Korea and Platycephalus sp. was demanded to recheck its taxonomic position comparing with other Asian specimens in future. A new key to the genera and species of the family Platycephalidae from Korea was reported, with description of their morphological characteristics and distribution.

• Korean Journal of Plant Taxonomy
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• v.42 no.1
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• pp.68-75
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• 2012

Two unrecorded species (Sceptridium atrovirens and S. microphyllum), previously known only in Japan, were found in a forest in Dosun-dong, Seogwipo-si, Jeju-do for the first time in Korea. S. atrovirens was distinguished from other related species of the genus Sceptridium in Korea by having the thickest rhizome and root, irregularly crenulate or roughly serrate, and a shorter sporophore blade. The local name was newly given as 'Sup-go-sa-ri-sam' for the species, denoting the habitat. S. microphyllum was distinguished by having the smallest plant height, compact sterile blades, and partly lateritious tropophyll in winter. The local name was newly given as 'Aegi-go-sa-ri-sam' for species, meaning of a small size. To reveal the interspecific relationships within the genus Sceptridium in Korea, cladistic analysis was performed for 27 morphological characteristics. The morphological characteristics and illustrations of the two taxa, as well as photographs at the habitat, are provided with a taxonomic key to the species of Sceptridium in Korea.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.1009-1012
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• 2008

The fiber dispersion performance in fiber-reinforced cementitious composites is a crucial factor with respect to achieving desired mechanical performance. However, evaluation of the fiber dispersion performance in the composite PVA-ECC(Polyvinyl alcohol-Engineered Cementitious Composite) is extremely challenging because of the low contrast of PVA fibers with the cement-based matrix. In the present work, an enhanced fiber detection technique is developed and demonstrated. Using a fluorescence technique on the PVA-ECC, PVA fibers are observed as green dots in the cross-section of the composite. After capturing the fluorescence image with a Charged Couple Device(CCD) camera through a microscope. The fibers are more accurately detected by employing a series of process based on a categorization, watershed segmentation, and morphological reconstruction.

• Animal Systematics, Evolution and Diversity
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• v.7 no.2
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• pp.179-188
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• 1991

In order to determine the taxonomic status of Apodemus agrarius chejuensis from Cheju island in Korea, three hundred and eleven samples of eight subspecies of striped field mice (subspecies, agrarius, ningpoensis , pallidior, chevrieri, insulaemus, manchuricus, coreae, and chejuensis of A. agrarius Pallas) in Asia, collected from Turkey , China, Taiwan, , Manchuria, and Koarea, were used. Four external and 27 cranial characters were measured and their measurements were utilized for multivariate analyses such as cluster, principal component, and discriminant analyses. Four forms were revealed . A largest-size from was chejuensis, whereas a large-size form was cheverieri. A medium -size from and a small-size from were coreae and other five subspecies (agrarius , ningpoensis, pallidior, insulaemus, and manchuricus) , respecitvley, but their differences were clinal. A discontinuous gap was revealed between chejuensis (a largest-size from) and six subspecies ( a medium-size from and a small-size form) Although chejuensis appeared to be a distinct species, it is concluded that molecular analyses are necessary in order to describe it as a new species.

• Korean Journal of Plant Taxonomy
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• v.39 no.4
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• pp.237-246
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• 2009

Inter-specific relationships among six species and two varieties, belonging to Scrophularia (Scrophulariaceae), in Korea were re-examined based on both morphological and molecular data. Scrophularia takesimensis, a Korean endemic species, should be separated from S. grayana as an independent species based upon unique morphological characters such as non-winged stems, thickened leaves and glabrous surfaces of leaves, even though they share a lot of other features. It was found that S. grayana is distributed in Sokcho in Korea and along the coast of the East Sea north to far eastern Russia. Although some morphologies of three taxa, S. cephalantha, S. koraiensis var. velutina and S. kakudensis var. microphylla appeared to differ from each other, their ITS DNA sequence data was similar to that of S. kakudensis, suggesting that they might better be designated with the later species. The taxonomic position of S. koraiensis, only found in Korea, has been ambiguous, but ITS DNA sequence data in this study revealed that this species is distinct from S. kakudensis. Consequently, we conclude that the genus Scrophularia in Korea includes five species.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.10a
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• pp.344-351
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• 1995

증기발생기가 원자로압력용기안에 위치한 일체형원자로의 개발을 위해서 가장먼저 개발되어야 할 요소기술은 관류형 증기발생기의 설계기술이다. 증기발생기는 기존의 상용로에서 사용되고 있는 재순환형 증기발생기와 관류형 증기발생기로 분류 할 수 있는데, U-튜브를 사용하는 재순환형 중기발생기의 경우 습분분리기와 증기건조기 등이 많은 공간을 요구하고 있고, 또한 중기발생기를 압력용기 안에 위치시킬 경우 일차측과 이차측의 냉각수 유로형태, 유동장의 안정성 등의 문제 때문에 일체형원자로에서는 관류형 증기발생기의 도입이 일반화 되어있기 때문이다. 본 연구에서는 관류형(직관 및 나선 전열관형) 증기발생기의 열수력학적 설계 및 성능분석을 위한 프로그램, ONCESG를 개발했다. 개발된 모델링 및 컴퓨터코드의 검증을 위해 외국의 관류형 중기발생기(직관형:미국/영국의 SIR, 나선형:일본의 MRX, SPWR)의 설계자료를 ONCESG프로그램을 사용해 모사한 결과와 이미 발표된 설계자료와의 비교분석을 수행했다. 모사결과 계산된 관류형 증기발생기의 열전달면적, 압력 및 온도분포가 외국의 발표된 설계자료와 잘 일치했으며, 개발된 ONCESG코드를 일체형 신형원자로의 개념설계시 다양한 목적으로 활용할 수 있음을 보였다.

• Applied Biological Chemistry
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• v.50 no.2
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• pp.101-106
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• 2007

Twenty-two strains of nematophagous fungi were isolated from 100 soil samples. Nematophagous fungi were classified into three categories; 3-dimensional adhesive nets (A group), 2-dimensional adhesive nets (B group) and constricting ring (C group). Nine strains were selected and identified on the basis of morphological characteristics (hypha, conidiophore, form and size of conidia, number of conidia, node of conidophore, number and location of septa, size and color of chlamydospore) and ITS (internal transcribed spacer) region of rDNA sequences. As the results, the isolated were identified as belonging to the species of Monacrosporium thaumasium (Kan-2, Kan-4, Kan-11), Arthrobotrys oligospora (Kan-9, Kan-13, Kan-20, Kan-21), A. musiformis (Kan-12), and A. dactyloides (Kan-22).