• Animal Systematics, Evolution and Diversity
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• v.15 no.2
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• pp.165-174
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• 1999

Specimens of five species of Apodemus(A. agrarius, A. chevrieri, A. draco, A. latronum, and A. peninsulae) from east Asia (Korea and China) were used for numerical taxonomic analyses with 31 external and cranial characters. Two groups and eight subgroups within them were recognized: [I; a large-size form; (A. agrarius chejuensis), (A. chevrieri), (A. draco orestes and A. latronum), and(A. peninsulae peninsulae and A. p. preator)], [II; a small-size form; (A. agrarius coreae), (A. agrarius manchuricus, A. a. ningpoensis, and A. a. pallidior), (A. draco draco), and (A. peninsulae sowerbyi)]. Conclusions based on morphometric analyses are such as followings: 1) Morphometric characters appeared not to be useful in order to distinguish two subgenera in Apodemus (Apodemus and Alsomys), 2) further analysis is necessary to determine whether or not A. draco and A. latronum are conspecific, and 3) A. a. chejuensis is in morphometric characters the largest form among five species of Apodemus studied. Moreover, it is confirmed: 1) A. agrarius, A. chevrieri, and A. peninsulae are distinct species, 2) A. draco and A. latronum are not conspecific with A. peninsulae. 3) Three forms of A. agrarius (large-size form, medium-size form, and small-size form) can be recognized as three subspecies [(A. a. chejuensis), (A. agrarius coreae), and (A, a, ningpoensis including A. a. manchuricus and A. a. pallidior)], 4)A. draco draco and A. draco orestes are distinct subspecies, 5) A. peninsulae peninsulae (including A. p. preator) and A. p. sowerbyi are distinct subspecies.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.929-932
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• 2004

DRACO 구조는 이중 링 연결형태에 대비하여 노드간 접근 경로를 단축할 수 있는 구조로, CC-NUMA 시스템에 대하여 그 적용성과 프로토콜이 시험되어 그 효율성이 입증되었다. 본 논문은 이러한 DRACO 구조가 보다 많은 프로세서를 수용할 수 있는 클러스터 시스템에 대하여 동일한 경로 단축과 대역폭 확장을 적용할 수 있음에 기반하여, 이중 연결 링크를 가지고 있는 점대 점 연결 형태의 클러스터 시스템에 대한 적용성을 연구하였다. 노드 내의 네트워크 인터페이스 및 소프트웨어만을 이용한 DRACO 구조 적용은 많은 수의 노드를 필요로 하는 시스템에 적합하고, 하드웨어를 이용한 연결 경로를 이용할 경우 상대적으로 적은 수의 노드를 채용하고 고속의 링크 성능을 필요로 하는 시스템에 적합할 것이다.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.1
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• pp.68.1-68.1
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• 2010

We focus on two Galactic molecular clouds that are located in wholly different environments and both are observed by FIMS instrument onboard STSAT-1. The Draco cloud is known as a translucent molecular cloud at high Galactic latitude. The FUV spectra show important ionic lines of C IV, Si IV+O IV], Si II* and Al II, indicating the existence of hot and warm interstellar gases in the region. The enhanced C IV emission inside the Draco cloud region is attributable to the turbulent mixing of the interacting cold and warm/hot media, which is supported by the detection of the O III] emission line and the $H{\alpha}$ feature in this region. The Si II* emission covers the remainder of the region outside the Draco cloud, in agreement with previous observations of Galactic halos. Additionally, the H2 fluorescent map is consistent with the morphology of the atomic neutral hydrogen and dust emission of the Draco cloud. In the Aquila Rift region near Galactic plane, FIMS observed that the FUV continuum emission from the core of the Aquila Rift suffers heavy dust extinction. The entire field is divided into three sub-regions that are known as the- "halo," "diffuse," and "star-forming" regions. The "diffuse" and "star-forming" regions show various prominent H2 fluorescent emission lines, while the "halo" region indicates the general ubiquitous characteristics of H2. The CLOUD model and the FUV line ratio are included here to investigate the physical conditions of each sub-region. Finally, the development of an infrared imaging system known as the MIRIS instrument onboard STSAT-3 is briefly introduced. It can be used in WIM studies through $Pa{\alpha}$ observations.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.06a
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• pp.1245-1248
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• 2022

본 논문에서는 사용자가 보다 간편하게 볼류메트릭 비디오를 소비할 수 있도록 볼류메트릭 비디오 기본 플레이어를 구현하고, 구현한 플레이어에 대하여 성능평가를 진행한다. 본 논문에서 구현한 볼류메트릭 비디오 플레이어는 Draco 와 V-PCC 를 복호화기로 지원하며, 압축 전의 포인트 클라우드 데이터와 Draco 와 V-PCC 로 압축한 비트스트림에 대하여 성능 평가를 진행하였다. 플레이어의 성능을 평가한 결과를 통해 초기 충분한 량의 프레임을 버퍼에 확보할 만큼의 초기 지연시간을 설정하지 않는 이상, 볼류메트릭 비디오를 30fps 이상으로 소비하기에는 어려움이 있음을 확인하였다. 이를 토대로 현재 볼류메트릭 비디오 재생을 위한 기술적 한계를 살펴보고, 볼류메트릭 비디오 플레이어의 성능 향상을 위한 향후 연구개발 방향에 대하여 논의한다.

• The Bulletin of The Korean Astronomical Society
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• v.32 no.2
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• pp.77-77
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• 2007

• The Bulletin of The Korean Astronomical Society
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• v.33 no.1
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• pp.61-61
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• 2008

• The Bulletin of The Korean Astronomical Society
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• v.31 no.2
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• pp.72.2-72.2
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• 2006

• The Bulletin of The Korean Astronomical Society
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• v.33 no.2
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• pp.77.2-77.2
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• 2008

• The Bulletin of The Korean Astronomical Society
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• v.44 no.2
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• pp.75.2-75.2
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• 2019

This poster introduces the ongoing "Narrow-band Ca Photometry for Dwarf Spheroidal Galaxies" project and presents the latest results. The project aims to explain the formation and evolution of dwarf spheroidal galaxies by examining the structural properties of stellar populations as a function of metallicity. To overcome the lack of stars with known spectroscopic metallicities for dwarf spheroidal galaxies, we apply the hk index as a photometric metallicity indicator to three galaxies-Draco, Sextans, and Canes Venatici I. For all three galaxies, we found that metal-poor and metal-rich groups of red-giant-branch stars have distinct spatial distributions, in which metal-rich stars are centrally concentrated while metal-poor stars are relatively dispersed. In Sextans, we found an off-centered peak of metal-poor stars which is presumed to be a disrupting star cluster in this galaxy. We will discuss the implications of our results for the dwarf galaxy formation and possible directions on future work of this project.

• The Korea Journal of Herbology
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• v.30 no.6
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• pp.1-6
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• 2015

Objectives : Draconis Resina (DR), the resin of Daemonorops draco Bl., is used to circulate the blood and to stop bleeding. It also has been used to generate flesh including ulceration. The present study investigated the effects of DR extract on collagen metabolism in human fibroblasts and tyrosinase activity in mushroom tyrosinase.Methods : The effect of DR extract on type I procollagen production (collagen type I synthesis) and collagenase (matrix metalloproteinase-1, henceforth referred as MMP-1) activity in human normal fibroblasts cell line. Hs68 cells after ultraviolet B (UVB, 312 nm) irradiation was measured using the enzyme - linked immunosorbent assay (ELISA). The tyrosinase activity was also measured to find out the whitening effects in mushroom tyrosinase by ELISA method.Results : There was no cytotoxicity at DR extract at concentrations of 10 μg/ml, 30 μg/ml, and 100 μg/ml. DR extract significantly inhibited the increase of collagenase activity, whereas it did not show on the reduction of type I procollagen in UVB damaged Hs68 cells. DR extract did not reduce the L - DOPA oxidation. However, it significantly reduced the tyrosinase activity by DR extract at concentraions of 0.1 mg/ml, 1 mg/ml and 10 mg/ml.Conclusions : In conclusion, DR showed the anti-wrinkle and whitening effects via the inhibition of collagenase production and the tyrosinase activity. These results suggest that DR may have potential as an anti-aging ingredient in cosmetic herb markets.