• 식물분류학회지
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• 제37권4호
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• pp.323-333
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• 2007

The degree to which parallel evolution utilizes the same genetic mechanisms indicates the degree to which developmental processes constrain or channel phenotypic evolution. A transgenetic strategy was used to elucidate the role of one floral meristem identity gene, LEAFY (LFY), in the evolution of rosette flowering, a plant architecture that has evolved in parallel in several lineages of the mustard family, Brassicaceae. The LFY genes from three rosette flowering species were cloned and introduced into a species with the ancestral architecture, and results indicated that changes at the LFY locus contributed to the evolution of rosette flowering in two of the three lineages, but that in each lineage a different set of genetic partners was involved. Also, LFY was shown to play a role in the evolution of flower size. Transgenetic strategy may be useful in the study of plant morphological evolution and parallelism.

• Bulletin of the Korean Chemical Society
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• 제35권1호
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• pp.309-312
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• 2014

• 센서학회지
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• 제28권4호
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• pp.231-235
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• 2019

We investigated the facile and effective strategy for sensitive and selective $C_2H_5OH$ sensors based on the In-decorated NiO nanoigloos. The In-decorated NiO nanoigloos is fabricated by RF sputtering using 750 nm-diameter polystyrene beads using a soft-template. The morphological evolution based on the Van der Drift model was generated through a heterojunction between In metal and NiO, resulting in a pyramidal rough surface. Upon decorating the In on the NiO surface, high sensitivity and selectivity to $C_2H_5OH$ were observed, and gas sensing mechanism was demonstrated by a high surface-to-volume and double Schottky barrier. We are confident that the method presented in this study will have a significant impact on the fabrication of effective nanostructures and their application for the gas sensors.

• 한국산학기술학회논문지
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• 제20권6호
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• pp.201-209
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• 2019

본 연구는 세계 스마트시티의 미래상을 위해 형태적 진화과정을 파악하는데 목적을 두고 있다. 주요 연구내용과 방법은 스마트시티에 융합 된 환경기술과 정보기술을 4개 대륙과 우리나라로 나누어 비교하였다. 이를 통해 연관성 분석과 시기별 디바이스/기술의 융합개수 분석을 하였다. 분석 자료는 우리나라를 포함한 세계 32개 스마트시티 사례이고, 시기는 4개의 범위 이다. 연구결과는 다음과 같다. 첫째, 1기의 스마트시티는 환경의 보존, 기존도시의 고유형태 고수, 필요한 디바이스/기술을 충족하는 형태적 진화였다. 둘째, 2기의 스마트시티는 정보기술 중심 개발을 통한 형태적 진화였다. 셋째, 3기의 스마트시티는 정보기술의 고도화와 환경기술의 에너지생산 그리고 관련된 디바이스/기술이 융합된 형태적 진화였다. 넷째, 4기에는 모든 기술의 고도화 과정을 통해 융합, 소멸, 그리고 새로운 환경기술과 정보기술이 창조되는 형태적 진화였다. 결과적으로, 스마트시티의 형태적 진화는 환경기술과 정보기술 간의 차별적 개발이 아닌, 융합형태의 유기적인 도시구조로 변화될 것이다. 더불어, 이러한 반복적인 기술의 융합과정을 통해 스마트시티의 형태는 계속해서 진화될 것이다.

• 고무기술
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• 제8권2호
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• pp.116-128
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• 2007

• Journal of Astronomy and Space Sciences
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• 제34권3호
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• pp.183-197
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• 2017

We present simulations of the optical-band images of high-redshift galaxies utilizing 845 near-ultraviolet (NUV) images of nearby galaxies obtained through the Galaxy Evolution Explorer (GALEX). We compute the concentration (C), asymmetry (A), Gini (G), and $M_{20}$ parameters of the GALEX NUV/Sloan Digital Sky Survey r-band images at z ~ 0 and their artificially redshifted optical images at z = 0.9 and 1.6 in order to quantify the morphology of galaxies at local and high redshifts. The morphological properties of nearby galaxies in the NUV are presented using a combination of morphological parameters, in which early-type galaxies are well separated from late-type galaxies in the $G-M_{20}$, $C-M_{20}$, A-C, and $A-M_{20}$ planes. Based on the distribution of galaxies in the A-C and $G-M_{20}$ planes, we examine the morphological K-correction (i.e., cosmological distance effect and bandshift effect). The cosmological distance effect on the quantitative morphological parameters is found to be significant for early-type galaxies, while late-type galaxies are more greatly affected by the bandshift effect. Knowledge of the morphological K-correction will set the foundation for forthcoming studies on understanding the quantitative assessment of galaxy evolution.

• 한국세라믹학회지
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• 제34권8호
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• pp.834-842
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• 1997

Controlled Ca impurity implanted inner crack-like pore in the high purity alumina single crystal, sapphire, had been created by micro-fabrication technique, which includes ion implantation, photo-lithography, Ar ion milling, and hot press technique. The morphological change and the healing of cracklike pore in Ca doped high purity single crystal alumina, sapphire, during high temperature heat treatment in vacuum were observed using optical microscopy. The dot-like surface roughening was developed and hexagon like crystal appeared on inner surface of crack-like pore after heat treatment. Bar type crystals, probably CaO.6Al2O3, were observed on the inner surface after 1 hour heat treatment at 1, 50$0^{\circ}C$, but this bar type crystal disappeared after 1 hour heat treatment at 1, $600^{\circ}C$. This disappearance means that there should be a little increase of Ca solubility limit to alumina at this temperatures.

• 천문학회보
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• 제41권2호
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• pp.60.3-61
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• 2016

Galaxy morphology involves complex effects from both secular and non-secular evolution of galaxies. Although it is a final product of galaxy evolution, it gives a clue to the processes that the a galaxy has gone through. Galaxy clusters are the sites where the most massive galaxies are found, and thus the most dramatic merger histories are embedded. Our deep imaging program (${\mu}{\sim}28\;mag\;arcsec^{-2}$), KASI-Yonsei Deep Imaging Survey for Clusters (KYDISC), targets 14 Abell clusters at z = 0.016 - 0.14 using IMACS/Magellan telescope and MegaCam/CFHT to investigate cluster galaxies especially on low surface brightness features related to galaxy interactions. We visually classify galaxy morphology based on criteria related to secular or merger related evolution and find that the morphological mixture of galaxies varies considerably from cluster to cluster. Moreover it depends on the characteristics (e.g. cluster mass) of cluster itself which implies that environmental effects in cluster scale is also an important factor to the evolution of galaxies together with intrinsic (secular) and galaxy merger. Our deep imaging survey for morphological inspection of cluster galaxies with low surface brightness is expected to be a useful basis to understand the nature of cluster galaxies and their internal/external evolutionary path.

• 한국어류학회지
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• 제26권4호
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• pp.249-258
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• 2014

금강에서 채집된 Acheilognathus sp.의 분류학적 위치를 밝히기 위하여 이들의 형태적 및 유전학적 특성을 검토하고 속 내의 유사종인 줄납자루 및 큰줄납자루와 비교하였다. 이들은 많은 형태적인 특징에서 거의 비슷하였으나 수컷의 혼인색인 등지느러미와 뒷지느러미 가장자리에 붉은 띠가 있고, 배지느러미 가장자리에 흰 띠가 있으며, 최대 체장이 줄납자루보다 큰 점, 계수형질에서는 척추골수가 다소 많은 점과 새파수는 적은 점 등의 특징에서 A. sp.가 다른 두 종과 차이가 있었다. 계통 분석에 의하면 A. sp.는 큰줄납자루 및 A. cyanostigma와 단계통을 형성하였으며 줄납자루와는 Acheilognathus속 내의 다른 종들보다도 더 먼 관계를 가지고 있었다. 따라서 금강의 A. sp.는 줄납자루, 큰줄납자루 및 일본의 A. cyanostigma와 형태, 분포 및 유전적 특성에 의하여 구별되는 다른 종의 수준에 있다고 생각된다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2006년도 제30회 학술논문발표회 초록집
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• pp.69-69
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• 2006