• The Plant Pathology Journal
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• v.28 no.3
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• pp.330-330
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• 2012

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.157.1-157.1
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• 2009

• Communications of Mathematical Education
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• v.20 no.1 s.25
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• pp.75-86
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• 2006

This study is partially supported Korea Science Foundation. In this paper we will introduce the result of project to revise mathematics curriculum of Korea Science Academy, and we will discuss the management of mathematics curriculum of Korea Science Academy. This study also analyze the pattern of taking mathematics course during year 2005. From this analyzing result, we will discuss about the development of mathematics curriculum of Korea Science Academy.

• Bulletin of the Korean Chemical Society
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• v.34 no.3
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• pp.949-952
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• 2013

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.279-282
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• 2012

본 연구에서는 혼합형 온톨로지 구축방법론을 이용하여 ATCIS 체계에 활용 가능한 국방온톨로지의 구축 과정을 보여주고자 한다. 이를 위해, 실제 ATCIS의 데이터베이스 정보들을 활용하였고 해당 방법론이 ATCIS 체계에 적용될 때 추가적으로 고려해야 할 사항들을 함께 분석하였다. 이러한 연구 결과는 향후 보다 실용적인 국방온톨로지 구축을 위한 기반 자료로 활용될 것으로 기대된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.621-624
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• 2007

군집로봇이란 하나의 일을 단순한 작업을 하는 여러 대의 로봇을 이용하여 수행하는 로봇들을 일컫는 말이다. 본 연구에서는 군집로봇을 이용하여 미로를 탐색하고 스스로 작업을 분할하여 목표물을 운반하는 로봇 제어프로그램을 작성했다. 또한 작성된 제어 프로그램으로 로봇 수와 작업 목표물 개수에 따른 군집로봇의 효과에 대하여 실험하였다. 작성된 제어 프로그램을 시뮬레이션 환경에 적용하여 실험한 결과 군집로봇을 사용하면 작업시간을 단축시킬 수 있었다. 또한 작업을 효과적으로 수행하기 위해서 로봇 수를 늘리는 것은 일정 한계까지 작업 효과가 증가하며 그 이후에는 오히려 작업 효과를 저해함을 알 수 있었다.

• International Journal of Industrial Entomology and Biomaterials
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• v.25 no.2
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• pp.209-213
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• 2012

The propolis was collected from the whole part of Korea Peninsula, such as central, southern, and Jeju island, to analyze the general composition including total flavonoid and phenolic contents, heavy metals, colors, amino acids, and crude lipid. The total flavonoid and phenolic contents of middle region in Korea Peninsula (4.26% and 13.06 g/100 g gallic acid) were higher than southern region (2.53%, 10.9 g/100 g gallic acid) and Jeju island (0.03%, 7.22g/100 g gallic acid), respectively. The heavy metals contents showed that Zn contents were found in $0.44{\pm}0.2ppm$ and a harmful heavy metal such as Cr, Cd, Pb, Ni, Cu, As, and Hg were not detected at all in our experiment. The colors of extracted propolis showed a various spectrum from yellow to red purple. Various amino acids were also detected as proline, valine, methionine and the average crude lipid contents of propolis were 42.4%. All data collected in South Korea were very first executed in our institution for the purposes of utilizing and developing the industrial insects, honeybees as well as silkworm.

• Bulletin of the Korean Mathematical Society
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• v.49 no.2
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• pp.381-394
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• 2012

We generalize the insertion-of-factors-property by setting nilpotent products of elements. In the process we introduce the concept of a nil-IFP ring that is also a generalization of an NI ring. It is shown that if K$\ddot{o}$the's conjecture holds, then every nil-IFP ring is NI. The class of minimal noncommutative nil-IFP rings is completely determined, up to isomorphism, where the minimal means having smallest cardinality.

• Journal of the Korean Society for Nondestructive Testing
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• v.36 no.1
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• pp.1-8
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• 2016

Single crystalline silicon wafers having (100), (110), and (111) directions are employed as specimens for obtaining slowness profiles. Leaky Lamb waves (LLW) from immersed wafers were detected by varying the incident angles of the specimens and rotating the specimens. From an analysis of LLW signals for different propagation directions and phase velocities of each specimen, slowness profiles were obtained, which showed a unique symmetry with different symmetric axes. Slowness profiles were compared with elastic moduli of each wafer. They showed the same symmetries as crystal structures. In addition, slowness profiles showed expected patterns and values that can be inferred from elastic moduli. This implies that slowness profiles can be used to examine crystal structures of anisotropic solids.

• International Journal of Industrial Entomology and Biomaterials
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• v.18 no.2
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• pp.121-124
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• 2009

We investigated sericin extracted from sericinjam, which was inbred at National Academy of Agricultural Science, Suwon, Korea. Sericinjam sericin is composed of 5 fractions: 250 kDa, 120 kDa, 90 kDa, 70 kDa and 40 kDa. Amino acid analysis showed that the major amino acids of sericinjam sericin were Ser, Gly, Asp, Glu, Thr and Ala. Infrared spectra showed that sericinjam sericin has $\beta$-sheet structure. Thermal property of sericin was investigated using DSC and then they showed characteristic degradation peak at around $215{\sim}240^{\circ}C$.