• Title/Summary/Keyword: 학자

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A taxonomic study of Abeliophyllum Nakai (O1eaceae) based on RAPD analysis (RAPD분석에 의한 미선나무속의 분류학적 연구)

  • 김동갑;박경량;김주환
    • Korean Journal of Plant Resources
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    • v.15 no.1
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    • pp.26-35
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    • 2002
  • Abeliophyllum distichum Nakai (O1eaceae) is a monotype of Korea and is distinguished from related genus Forsythia Vahl by the morphological characters such as fruit shape, flower color and etc. Even though several intraspecific taxa were reported according to the color of flowers and shape of fruits, there have been many controversals on the taxonomic indentity and status of rank on those taxa. In the present study, we performed the RAPD analysis to delimit the infraspecific taxa of Abeliophyllum distichum and to investigate the genetic polymorphism and relationships among 12 populations. 212 scorable RAPD markers with 70 common markers were found from the PCR reactions with 16 random oligoprimers and were analyzed by Nei's genetic distance. From 0.108 to 0.321 of genetic variations were showed among the taxa. Some regional groups instead of same taxa were clustered from the phonogram of UPGMA analysis. Also, we could not find distinct lineage among intraspecific taxa. The result from RAPD analysis supported that the infraspecific taxa of Abeliophyllum distichum might be the individual variations and treated as the same taxa. RAPD analysis was very useful to confirm the high gene pool with diverse genetic polymorphism among Abeliophyllum distichum populations.

Comparative studies on the Hanabusaya asiatica and its allied groups 1. External morphology and anatomical characters (금강초롱꽃 (Hanabusaya asiatica)과 근연분류군의 비교연구 1. 외부형태 및 해부학적 형질)

  • 유기억
    • Korean Journal of Plant Resources
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    • v.8 no.3
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    • pp.223-235
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    • 1995
  • Comparative studies on external morphology and anatomical characters were conducted understand the interspecific relationships and possibly to identify the position of Hanabusaya asiatica as an endemic genus among 4 genera and 9 species in H. asiatica and its allied groups. Such morphological characteristics as root shape, leaf size, presence or absence of wings in petiole, corolla and calyx shape, and inflorescence and stigma shape were useful qualitative characters. The morphology of stem, peduncle, calyx lobe, leaf, petiole, and ovary were also good characters to be included in this identification study. In the anatomical observations in these organs, projecting degree of epidermis and number of projecting area rather than cross-sectioned internal structures were found to be valuable index for the classification among species. External morphology and anatomical characters support the position of H. asiatica as an endemic genus very well. Known as the most important external characters to taxonomists(Fedorov, 1957: Nakai, 1952: Hong, 1983), leaf arrangement, inflorescence, and corolla shape were also preven to be very useful characters to identify the genera and species in the H. asiatica and its allied groups.

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Festival search factor analysis for festival application users (축제 앱 사용자를 위한 축제 검색 요인분석)

  • Lee, Chang-keun;Kim, Soon-gohn
    • Journal of Digital Contents Society
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    • v.16 no.6
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    • pp.883-892
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    • 2015
  • This paper was conducted to improve existing festival apps that present information in a one-dimensional and unengaging manner by analyzing the factors for festival quality factor from satisfaction evaluation items in culture and tourism festival evaluation reports as well as international and domestic studies. An exploratory factor analysis generated a KMO value of 0.821. After eliminating factors with factor loadings lower than the standard value, the factors of accessibility, promotion and information, contents of events, festival products, food, and amenities were extracted. Reliability was gauged using Cronbach's ${\alpha}$(Alpha), which was calculated to be 0.816. In the confirmatory factor analysis, the p value in the chi-square test was 0.289 while CMIN/DF was 1.100. The fit indices of GFI, AGFI, CFI, NFI, and IFI were all higher than the 0.9 mark while RMSEA was 0.018.

The Influence of Hotels' Service Quality and Customer Value on the Reservation Intention: Temporal Construal Theory Perspective (호텔서비스품질과 고객가치가 예약의도에 미치는 영향: 시간해석이론 관점에서)

  • Do, Hyun-Ok;Kim, Gwi-Gon
    • Journal of Digital Convergence
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    • v.10 no.11
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    • pp.307-313
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    • 2012
  • The purpose of this study is to suggest a research for hotels' expected service quality which influences reservation intention of hotel services. And we checked that these relations are formed by mediating of customer value on the basis of temporal construal theory. The result of our studies is as follows: 1) An abstract hotels' expected service quality(a concrete hotels' expected service quality) influence more on the customer's the social psychological value(the functional value) than the functional value(the social psychological value). 2) The customer's functional value(the social psychological value) influence more on the reservation intention of hotel service near(distant) in time than distant(near) in time. This research provides a theoretical-practical implications to the marketing staffs like packaging designers as well as scholars to study hotel services.

How do Verbal Information and Cognitive Load adjust the Anchoring Effect? (언어정보와 인지부하는 기준점설정효과를 어떻게 조정하는가?)

  • Lee, Hyun-Kyung;Kim, Gwi-Gon
    • Journal of Digital Convergence
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    • v.10 no.11
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    • pp.323-329
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    • 2012
  • This study examines the anchoring effect and the adjustment process of two variables(verbal information, cognition load) with snack products. In the results of this study, 1) we found the anchoring effect because the respondents predicted more the number of real units(goraebap) on the packaging painted 25 units than 5 ones. 2) We confirmed the moderating effect of verbal information. The difference of the number of real units predicted between the two packaging was decreased when the visual information was in company with verbal information. And 3) the moderating effect of cognitive load appeared because the more cognitive load was, the less the difference of the number of real units predicted was. This study has shown that we can reduce the errors and biases by adjusting the information frame or the cognitive load. This research provides a theoretical-practical implications to the marketing staffs like packaging designers as well as scholars to study consumer psychology.

Comparison of Various Methods Applied to the Leukocyte Differential Counting (각종백혈구백분비계산법(各種白血球百分比計算法)에 관(關)한 고찰(考察))

  • Yoon, Young Hun
    • Korean Journal of Veterinary Research
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    • v.1 no.1
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    • pp.30-35
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    • 1961
  • Inasmuch as a great variety of methods for the leukocyte differential counting have been described, it may be expected that actual counts obtained considerably vary according with the particular methods applied to the enumeration of differentiated leukocyes. An attempt, therefore, was undertaken to compare the values measured by five authentic methods commonly in use with those obtained by thirteen methods devised by the author. The results seemed to indicate that relatively reliable method is to count, end to end, all leucocytes on fields looted on the central horizontal axis of the film and two adjacent lines parallel to the central line and quartering the film.

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Studies on the Distribution of Salmonella Group Organisms in Animals (1st. Report) Distribution of Salmonella Group Organisms in Dogs of Taegu Area (동물(動物)의 Salmonella속균(屬菌) 분포(分布)에 관(關)한 연구(硏究) 제(第)1보(報) 대구지역(大邱地域)의 견(犬)에 있어서의 Salmonella 속균(屬菌)의 분포(分布))

  • Jo, Han-Cheol
    • Korean Journal of Veterinary Research
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    • v.1 no.1
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    • pp.29-29
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    • 1961
  • 동물(動物)의 Paratyphoid의 원인균(原因菌)으로서 각종동물(各種動物)에서 여러학자(學者)들에 의(依)하여 많은 Salmonella속균(屬菌)이 분리보고(分離報告)되고 있으나 우리나라에서는 아직 동물(動物)에 있어서 Salmonella속균(屬菌)에 대(對)한 관심(關心)이 극(極)히 희박(稀薄)하여 돈(豚)의 Paratyphoid와 추백리(雛白痢)를 제외(除外)한 그 외(外)의 가축(家畜)의 Salmonella증(症)은 거이 간과(看過)되고 있는 상태(狀態)에 있으며 인간(人間)의 Paratyphoid 및 식중독등(食中毒等)에 밀접(密接) 관계(關係)가 있음을 생각할 때 가축(家畜)의 Salmonella증(症)은 단지 수의학(獸醫學) 뿐만 아니라 공중위생상(公衆衛生上) 경시(輕視)못할 문제(問題)이다. 특(特)히 견(犬)은 애완용(愛玩用), 수렵용(狩獵用), 또는 가정(家庭) 경비용등(警備用等)으로 인간생활(人間生活)에 있어 접촉(接觸)하는 기회(機會)가 가장 많은 동물(動物)이므로 이로 인(因)한 인간(人間)의 폐해(幣害)을 생각하지 않을수 없다. 필자(筆者)는 견(犬)에 있어서의 Salmonella속균(屬菌)의 분포상태(分布狀態)를 조사(調査)할 목적(目的)으로 1958년(年) 하계(夏季) 대구(大邱) 시내(市內) 광견병(狂犬病) 예방접종시(豫防接種時) 가정상양견(家庭飼養犬) 100두(頭)의 분변(奮便)을 검사(檢査)하여 6두(頭)에서 Salmonella속균(屬菌) 각(各) 1주(株)씩을 분리(分離)하였으며 다음과 같이 균형(菌型)을 결정(決定)하였다. Sal. typhi-murium 1주(株) Sal. cholerae-suis 1주(株) Sal. paratyphi A 1주(株) Sal. bartord 1주(株) 균형미결정(菌型未決定) 2주(株) (경북대학교(慶北大學校) 논문집(論文集) 제3집(第三輯)에 발표(發表)하였음).

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System Design and Implementation for the Efficient Management and Automatic Update of Protein-Protein Interaction Data. (단백질 상호작용 데이터의 효율적 관리와 자동 갱신을 위한 시스템 설계와 구현)

  • Kim, Ki-Bong
    • Journal of Life Science
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    • v.18 no.3
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    • pp.318-322
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    • 2008
  • This paper deals with an efficient management and automatic update sub-system for WASPIFA (Web-based Assistant System for Protein-protein Interaction and Function Analysis) system that had been developed in the past and now provides the comprehensive information on protein-protein interaction and protein function. Protein interacting data has increased exponentially, so that it costs enormous time and effort. In other words, it is actually impossible to manually update and manage an analysis system based on protein interacting data. Even though there exists a good analysis system, it could be useless if it was able to be updated timely and managed properly. Unfortunately, in most cases, biologists without professional knowledge on their analysis systems have to cope with a great difficulty in running them. In this respect, the efficient management and automatic update subsystem of protein interacting and its related data has been developed to facilitate experimental biologists as well as bioinformaticians to update and manage the WASPIFA system.

Research Trend of Organic/Inorganic Composite Membrane for Polymer Electrolyte Membrane Fuel Cell (고분자 전해질 연료전지용 유.무기 복합막의 연구개발동향)

  • Kim, Deuk Ju;Nam, Sang Yong
    • Membrane Journal
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    • v.22 no.3
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    • pp.155-170
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    • 2012
  • Fuel cells have been considered as alternative power generation system in the twenty-first century because of eco-friendly system, high power density and efficiency compare with petroleum engine system. Proton exchange membranes (PEMs) are the key components in fuel cell system. Currently, Nafion has been used in fuel cell system. However, Nafion has disadvantages such as low conductivity at high temperature and high cost. The researchers have focused to reach the high properties such as high proton conductivity, low permeability to fuel, good chemical/thermal stability, good mechanical properties and low manufacturing cost. Various methods have been developed for preparation of proton exchange membrane with high performance and commercialization of fuel cell system. The hybrid organic/inorganic membrane has the potentials to provide a unique combination of organic and inorganic properties with improved proton conductivity and mechanical property at high temperatures. So, this paper presents an overview of research trend for the composite membranes prepared by organic/inorganic system using various inorganic materials.

Trend of Research on the Korean Geography in China (중국의 한국지리 연구동향)

  • Jin, Shizhu
    • Journal of the Korean association of regional geographers
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    • v.10 no.4
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    • pp.824-832
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    • 2004
  • By reviewing the research papers and books about Korean geography published in China during the recent 20 years, the trend of research on the Korean geography in the filed of general and professional viewpoint was summarized in this paper. For general review, 4 major trends were observed. First, lots of research institutes have been newly established. Second, the amount of journals and books related to the Korean geography are keeping increasing. Third, a series of new academic results arc being achieved. Forth, academic exchange activities are being carried out actively in broader rangers. For professional geography study, researchers are more focused on the study of human geography rather than physical geography. And in the field of physical geography, studies about geology, earthquake and natural resource appeared livelier than others, while in human geography, studies about economic geography attract more interests. It was also observed that problems such as the research fields are limited and Jack of fundamental theory study exist. To solve these problems, the learned circles of Chinese geography should do more efforts, while an effort of introduction of achievements of Korean geography study to china by learned circles of Koran geography are also necessary.

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