• 전기학회논문지
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• 제59권3호
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• pp.657-663
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• 2010

Today, rapid evolution of Internet makes various types of services in ubiquitous environment are intelligent and active. As a result, user's demand on high quality of life increases and health care service based on ubiquitous environment draws a lot of attention. However, user's private information used for health care service is illegally distributed and exposed, causing serious individual and social problems. Therefore, this thesis is intended to suggest a secure health care service to prevent unauthorized third party's access and to protect user's privacy in health care systems. The proposed scheme establishes a session key through communication channel between health care system and user based on explicit mutual authentication and provides secure communication and access control, improving security as one of the leading health care systems.

• Animal Systematics, Evolution and Diversity
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• 제16권1호
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• pp.87-104
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• 2000

1994년 5월부터 남한의 다향한 담수역 65개 지점에서 채집한 표본들을 관찰한 결과 모두 10종의 담수산 복모류를 동정하였다.: Polymerurus rhomboides(Stokes), P. nodicaudus(Voigt), Lepidodermella squamata (Dujardin), Chaetonotus(Zonochaeta) succinctus Voigt, C. (Z.) bisacer Greuter, C. (Euchaetonotus) polyspinosus Greuter, C. (E.) heterospinosus Balsamo, C. (E.) heideri Brehm, C. (E.) zelinkai Grunspan, and C.(Hystricochaetonotus) persetosus Zelinka. 저자들은 이들을 재기재하고 도판과 검색표를 작성하였다. 본 연구는 한국 담수산 복모류에 관한 최초의 기록이다.

• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.235-245
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• 2017

Two cumaceans species, Eocuma amakusense $Gam{\hat{o}}$, 1967 and E. latum Calman, 1907, belonging to the family Bodotriidae are collected from the southern sea in Korea, and are redescribed. At the present, just one species belonging to the genus Eocuma, E. cf. hilgendorfi Marcusen, 1894 has been reported in Korea. Herein we add two Eocuma species to the Korean cumacean fauna and described them with full illustration contained new information of mouthparts. A key to the Korean Eocuma species is also provided.

• 열처리공학회지
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• 제27권3호
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• pp.115-120
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• 2014

Microstructural features were comparatively investigated in AZ91 (Mg-9%Al-1%Zn) and AZ91-0.5%Sn alloys, in order to clarify the reason for the enhancement in room temperature tensile properties by the addition of small amount of Sn in Mg-Al-based alloy. In as-cast state, the Sn-containing alloy showed increased YS, UTS and elongation than the Sn-free alloy. The microstructural examination revealed that various factors including finer cell size, reduction of lamellar (${\alpha}+{\beta}$) phase and morphological change of bulky ${\beta}$ phase from partially divorced shape to fully divorced shape, are likely to be responsible for the improvement in tensile properties for the Sn-containing alloy. It is noted that two alloys showed similar tensile properties after solution treatment. This implies that microstructural evolution related to the ${\beta}$ phase plays a key role in better tensile properties in the Sn-containing alloy.

• The Korean Journal of Pain
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• 제23권3호
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• pp.159-165
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• 2010

The evolution of brain imaging techniques over the last decade has been remarkable. Along with such technical developments, research into chronic pain has made many advances. Given that brain imaging is a non-invasive technique with great spatial resolution, it has played an important role in finding the areas of the brain related to pain perception as well as those related to many chronic pain disorders. Therefore, in the near future, brain imaging techniques are expected to be the key to the discovery of many unknown etiologies of chronic pain disorders and to the subjective diagnoses of such disorders.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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• pp.30.2-30.2
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• 2008

The Cosmic Far-Infrared Background (CFIRB) contains information about the number and distribution of contributing sources and thus gives us an important key to understand the evolution of galaxies. In order to detect CFIRB fluctuation effectively, we have to analyze the confusion carefully which sets a fundamental limit to the deep observations. From our deep observations, we can compare the background fluctuation via observations of regions at different Galactic latitudes. Our comparative study between estimated confusion levels from our observations and those from our model enables us to understand the nature of CFIRB. We introduce our CFIRB observations and report the preliminary results.

• 대한수학회보
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• 제46권4호
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• pp.627-644
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• 2009

The gauge-Uzawa method which has been constructed in [11] is a projection type method to solve the evolution Navier-Stokes equations. The method overcomes many shortcomings of projection methods and displays superior numerical performance [11, 12, 15, 16]. However, we have obtained only suboptimal accuracy via the energy estimate in [11]. In this paper, we study semi-discrete gauge-Uzawa method to prove optimal accuracy via energy estimate. The main key in this proof is to construct the intermediate equation which is formed to gauge-Uzawa algorithm. We will estimate velocity errors via comparing with the intermediate equation and then evaluate pressure errors via subtracting gauge-Uzawa algorithm from Navier-Stokes equations.

• Animal Systematics, Evolution and Diversity
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• 제21권1호
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• pp.11-19
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• 2005

꼬마새우류인 동해좁은뿔꼬마새우 (Heptacarpus jordani)가 한국 미기록종으로 판명되어 보고한다 혹등좁은뿔꼬마새우 (H. genicuiatus)는 재기재하였다. 한국산 좁은뿔꼬마새우속 6종에 대한 검색표를 제시하였다. 현재 한국산 꼬마새우과는 9속 21종이다

• Animal Systematics, Evolution and Diversity
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• 제21권1호
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• pp.31-43
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• 2005

한국의 육수역에 서식하는 발톱갈고리노벌레속 (Onychocamptus)의 3종, 가시 발톱갈고리 노벌레 (O. vitiospinulosa), 돌출발톱갈고리노벌레 (O. mohammed) 및 벵갈발톱갈고리노벌레 (O. bengalensis)을 보고한다. 이중 가시발톱갈고리노벌레와 돌출발톱갈고리노벌레는 한국미기록종이다. 가시발톱갈고리노벌레를 재기재하였다. 이들 3종의 미세 형태학적 형질과 종내변이성에 대한 분류학적 검토를 수행하였고, 그림과 함께 검색표를 작성하였다.

• Animal Systematics, Evolution and Diversity
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• 제17권2호
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• pp.217-222
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• 2001

한국산 먼지송장벌레과의 분류학적 연구를 수행하였다. 지금까지 먼지송장벌레과에 한 종만이 보고되고 있었으나 큰먼지송장벌레(Pteroloma koebelei)를 국내에서 처음으로 보고한다. 두 종에 대한 진단형질, 수컷 생식기의 그림, 성충사진 및 분류 검색표를 제시하였다.