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A Osteological Study of the Venus Fish, Aphyocypris Chinensis Gnther (Cyprinidae) from Korea (한국산 왜몰개 Aphyocypris chinensis Gnther의 골학적 연구)

  • 이충렬;김익수
    • Animal Systematics, Evolution and Diversity
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    • v.3 no.1
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    • pp.41-50
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    • 1987
  • The osteological characters of Aphyocypris chinensis of subfamily Leuciscinae were examined and the systematic position of this species is discussed through comparison with other species of subfamilies Leucisicinae and Cultrinae. Numbers of the dorsal an danal fin ray, having no symphyseal knob and barbels and separation between dermosphenotic and supraorbital, are in acord with those of subfamily Leuciscine, and the abdominal keel and trigemino-facial nerve foramen of the prootic are more closely related with those of subfamily Cultrinae. But several diagnostic characters detected only in this species are as follows ; 4 infraorbitals, the shape of ethmoid, 5-6 hypurals, the broad orbital width, having no extrascapular, incomplete lateral line and considerable small size.

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An Empirical Study on Price and Volatility Spillover between Korea Stock Market and Chinese Stock Market (중국 주식시장의 시가갭이 한국주식시장의 장중 수익률과 변동성에 미치는 영향에 관한 연구)

  • Park, Joung-Hae;Seo, Sang Gu
    • Management & Information Systems Review
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    • v.31 no.3
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    • pp.307-321
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    • 2012
  • This paper examines the spillover effect between Korea stock market and Chinese stock market according to increasing economic power of Chinese. Chinese stock market start the transaction one hour and half early than Korea stock market. Especially we focuses the response of Korea stock market after Chinese stock market starts. So we analyze the return an volatility of Korea stock market after 10:30. We employee daily and intraday stock return and volatility. The sample period ranges from January 2008 to April 2010 total 28 months. Our results show that the gap of open price between Korea and Chinese stock market affect the five minute return and volatility of Korea stock market but don't affect the ten minute return and volatility. Recently, this spillover effect has increased more and more. This shows the rapid increase of economic power of Chinese to affect the Korea capital market.

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Genomic Structure Analyses of Five Kinds of Human Sialyltransferase Gene (5종류의 인간유래 시알산전이효소 유전자들의 게놈구조 분석)

  • Kang Nam-Young;Kim Sang-Wan;Kim Cheorl-Ho;Lee Young-Choon
    • Journal of Life Science
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    • v.14 no.6 s.67
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    • pp.1009-1017
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    • 2004
  • Sialyltransferases cloned so far show the remarkable tissue-specific expression, which is correlated with the existence of cell type-specific sialylated sugar structure in glycoconjugates. In the previous studies, we found various mRNA isoforms of human sialyltransferases generated by alternative splicing and alternative promoter utilization. To understand the regulatory mechanisms for specific expression of human sialyltransferase genes and for production of their mRNA isoforms, in this study, we have isolated and characterized five kinds of human sialyltransferase genes: hST3Gal II, hST8Sia II, hST8Sia III, hST8Sia IV, and hST8Sia V. The hST3Gal II gene is composed of six exons, which span over 17kb, with exons ranging in size from 46 to over 1017 bp. The hST8Sia III gene comprises over 10 kb, and consists of only four exons, which is much smaller and simpler than other human sialyltransferase genes. In contrast, three genes (hST8Sia II, hST8Sia IV and hST8Sia V) span more than 70 kb, and comprise five or more exons. All exon-intron boundaries follow the GT-AG rule. In particular, the sialylmotif L, which is a highly conserved region in all cloned sialyltransferases, was found in one exon of hST8Sia III, whereas this motif is encoded by discrete exons in the other human sialyltransferases. Exon structures of these sialyltransferase genes show the structural diversity, as found in other human sialyltransferase genes reported so far. We determined the transcription start site of hST3Gal II gene by the 5'-RACE and cap site hunting experiments.

Electrochemical Study on Transfer Reaction of Ionizable Cefotiam across a Water/1,2-dichloroethane Interface and Drug Sensing Applications (물/1,2-Dichloroethane 계면에서 Cefotiam 약물 이온의 전이 반응 연구 및 약물 센서에 응용)

  • Liu, XiaoYun;Jeshycka, Shinta;Lee, Hye Jin
    • Applied Chemistry for Engineering
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    • v.29 no.5
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    • pp.581-588
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    • 2018
  • In this article, electrochemical investigation of the transfer reaction of ionizable cefotiam (CTM), an antibiotic molecule across a polarized water/1,2-dichloroethane (water/1,2-DCE) interface was studied. Ion partition diagram providing the preferred charged form of CTM in either water or 1,2-DCE phase was established via the voltammetric evaluation of the transfer process of differently charged CTM species depending upon the pH variation of aqueous solutions. Thermodynamic information including the formal transfer potential and formal Gibbs transfer energy values in addition to important pharmacokinetics including partition coefficients of ionizable CTM were also evaluated. In particular, the current associated with the transfer of CTM present at pH 3.0 aqueous solution proportionally increased with respect to the CTM concentration which was further used for developing CTM sensitive ion sensor. In order to improve the portability and convenient usage, a single microhole interface fabricated in a supportive polyethylene terephthalate film was used of which hole was filled with a polyvinylchloride-2-nitrophenyloctylether (PVC-NPOE) gel replacing 1,2-DCE, a toxic organic solvent. A dynamic range of $1-10{\mu}M$ CTM was obtained.

Impact Factors of KS-QFD Training Participants of 3 years over Startups on Transfer Intension (창업기업 QFD 교육 훈련 프로그램의 학습 전이의도에 관한 연구)

  • Hwangbo, Yu;Yang, Young-Seok;Kim, Myung-Seuk
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.12 no.6
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    • pp.1-12
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    • 2017
  • This paper is brought to asses the training effect of KS-QFD boot camp for the companies in the early growth stage. In particular, the focus of research falls on measuring transfer intension of the participants from the early stage companies older than three years old, motivating effect of applying knowledges acquired from KS-QFD training camp into their real business case. KS-QFD program is presented to help company in the early stage companies over three years old of boosting up their sales volume more than 5 times than now for the next 18 months by this training. The training program of KS-QFD is ultimately to design more practical and helpful program to real business and spread out. The research establish model by setting the learner readiness and perceived content validity by doing training design as independent variables, self-efficacy of learner as mediating variable, and transfer intension as dependant variable. Research results shows the following outcomes. First, learner readiness does not have directly effect on transfer intension under keeping statistical significance. But as the parameter of self-efficacy, it has perfect mediating effect. Second, research proves that perceived content validity have directly impact on learning transfer intension of mediating by self-efficacy partially. This research contributes on proving that learning by doing KS-QFD boot camp enable the participants to build up their self-efficacy and lead to enhance transfer intension. In more steps, the research validates that KS-QFD training camp have delivered very practical and helpful on-site knowledge to the participants.

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The Effect of The Types of Manufacturing Factories on Transferred Essence and Consumers' Perceived Value: Moderating Safety Product Betrayal (제조공장 유형이 본질 전이와 소비자의 가치 인식에 미치는 영향: 안전제품 배신을 중심으로)

  • Jeong, Heonbae;Lee, Yongju
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.11 no.5
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    • pp.117-128
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    • 2016
  • In order to extend FOO, this research has the object to demonstrate existing the difference of transferred essence and value between the types of factories(Original factory vs Extended factory). A safety product should save consumers from possible harm or risk, but it sometimes gives directly some damage to consumers. For example, like the issue of a germicide problem in 2016, a germicide killed consumers because of harmful chemistry even it should kept their health. This situation refer to 'Safety product betrayal', we expected that safety product betrayal presence/absence conditions moderate the relationship between types of factories, transferred essence and value. We selected a car air-bag as a safety product for study and implemented one study with total 213 participants. As a result, the participants evaluated the value of an air-bag manufactured throughout an original factory higher than the value of an air-bag manufactured throughout an extended factory. Futhermore, they evaluated the transferred brand essence of an original factory's air-bag higher than an extended factory's. However, in the safety product betrayal presence condition, the difference of value and transferred essence between an original factory and an extend factory was disappeared. Indeed, once consumers experienced or saw safety product betrayal, they avoided to buy or use safety products. Therefore, consumers evaluated the value and transferred essence of betrayed safety products is low without the types of manufacturing factories. From the past to now, there was no paper about the relationship between the types of manufacturing factories(Orignal factory vs Extended factory) and safety product betrayal in Korea. Therefore, this research on FOO and safety product betrayal can give new theoretical and operational contribution. In the conclusion, we discussed the contribution of the study results and proposed the limitation and future study.

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소프트웨어 인스펙션을 이용한 소프트웨어 품질의 실험적 평가와 예측

  • 소선섭
    • Journal of Software Engineering Society
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    • v.14 no.1
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    • pp.50-58
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    • 2001
  • 소프트웨어의 품질은 개발이 완료된 후 운영과정에서 발생되는 고장(Failure)의 정도에 따라 결정되고, 고장(Failure)은 소프트웨어에 남아있던 오류(Defects)가 실행 중(Activate)되어 나타나는 현상이다. 따라서 소프트웨어의 품질을 효과적으로 높이기 위해서는 다음 사항을 고려해야 한다. 첫째, 오류가 만들어지면 가능한 한 빨리 찾아서 없애야 한다는 점이다. 다음 단계로 전이될 경우, 오류를 정정하는 비용이 크게 증가되기 때문이다. 둘째, 오류가 균등 분포하기 보다 특정 부분에 몰리는 경향이 있으므로, 문제 부품을 예측하여 집중 관리를 해야 한다. 본 논문에서는 이들을 고려하여 효과적인 오류 검출 방법인 인스펙션을 기반으로 여러 오류 검출 방법간의 비교 우위를 분석하고, 모든 모듈을 예측하는 품질 예측 모델을 제시하였다.

Interview - Drawing attention to Hanok that has traditional Hanok aesthetics but has evolved into a different form (인터뷰 - 전통 한옥미 갖추되, 다른 형태로 발전시킨 한옥 주목받아)

  • 조아라
    • Korean Architects
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    • s.656
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    • pp.30-31
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    • 2023
  • 대한민국 한옥공모전이 지난 11월 1일 수상작을 발표했다. 준공 부문 대상은 '정다운 집(설계 어번디테일건축사사무소의 최지희, 텐틀러 다니엘)'이 받았다. 이 작품은 여백이 느껴지는 한옥 고유의 공간이 잘 구현됐으며 완성도가 높아 현대 주거문화에서 한옥이 추구하는 방향성에 대한 시사점이 큰 작품이라는 평가를 받았다. 금상은 '천일 한의원(설계 류와 건축사사무소 류종미, 강성원, 김소희)과 '화림원(설계 건축사사무소 하오 김세원, 이홍원, 김계원)'이 수상했다. 준공 부문에서 수상자인 최지희, 류종미, 김세원 건축사의 이야기를 들어봤다.

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우리나라 육상 중역기점 전이

  • Choe, Gwang-Seon;Ok, Su-Seok;Won, Ji-Hun
    • Journal of the Korean Geophysical Society
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    • v.4 no.2
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    • pp.121-131
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    • 2001
  • We have established 88 auxiliary gravity reference stations by using two gravitimeters at the observation offices of the Korean meteorological agency and measured the locations by using GPS. All gravity values have been calculated on the basis of the gravity reference point at Pusan National University, thus, they have been established to bge easily converted to new absolute gravity value later. The increased numbers of the gravity reference stations will minimize errors due to measurements, drift correction etc. and increase the accuracy of the gravity data. The result of this research will be used to verify the gravity data which calculated with the relative gravity meter and to inspect relative gravity meters.

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InAs/GaAs 양자점 태양전지의 여기광 세기에 따른 Photoreflectance 특성 연구

  • Lee, Seung-Hyeon;Min, Seong-Sik;Son, Chang-Won;Han, Im-Sik;Lee, Sang-Jo;Smith, Ryan P.;Bae, In-Ho;Kim, Jong-Su;Lee, Sang-Jun;No, Sam-Gyu;Kim, Jin-Su;Choe, Hyeon-Gwang;Im, Jae-Yeong
    • Proceedings of the Korean Vacuum Society Conference
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    • 2012.02a
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    • pp.426-426
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    • 2012
  • 본 연구에서는 GaAs p-i-n 접합 구조에 InAs 양자점을 삽입한 양자점 태양전지(Quantum Dot Solar Cell; QDSC)의 내부 전기장(internal electric field)을 조사하기 위하여 Photoreflectance (PR) 방법을 이용하였다. QDSC 구조는 GaAs p-i-n 구조의 공핍층 내에 8주기의 InAs 양자점 층을 삽입하였으며 각 양자점 층은 40 nm 두께의 i-GaAs로 분리하였다. InAs/GaAs QDSC는 분자선박막 성장장치(molecular beam epitaxy; MBE)를 이용하여 성장하였다. 이 때 양자점의 형성은 InAs 2.0 ML(monolayer)를 기판온도 $470^{\circ}C$에서 증착하였다. QDSC 구조에서 여기광원의 세기에 따른 전기장의 변화를 조사하였다. 아울러 양자점 층 사이의 i-GaAs 층 내에 6.0 nm의 AlGaAs 퍼텐셜 장벽(potential barrier)을 삽입하여 퍼텐셜 장벽 유무에 따른 전기장 변화를 조사하였다. PR 측정에서 여기광원으로는 633 nm의 He-Ne 레이저를 이용하였으며 여기광의 세기는 $2mW/cm^2$에서 $90mW/cm^2$까지 변화를 주어 여기광세기 의존성실험을 수행하였다. 여기광의 세기가 증가할수록 photovoltaic effect에 의한 내부 전기장의 변화를 관측할 수 있었다. PR 결과로부터 p-i-n 구조의 p-i 영역과 i-n 접합 계면의 junction field를 검출하였다. p-i-n의 i-영역에 양자점을 삽입한 경우 PR 신호에서 Franz-Keldysh oscillation (FKO)의 주파수가 p-i-n 구조와 비교하여 변조됨을 관측하였다. 이러한 FKO 주파수성분은 fast Fourier transform (FFT)을 이용하여 검출하였다. FKO의 주파수 성분들은 고전기장하에서 electron-heavyhole (e-hh)과 electron-lighthole (e-lh) 전이에 의해 나타나는 성분으로 확인되었다.

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