• 제목/요약/키워드: key characters

검색결과 349건 처리시간 0.03초

Taxonomic review and morphometric analysis of the genus $Melanaphis$ van der Goot (Hemiptera: Aphididae) in Korea

  • Kim, Hyo-Joong;Jang, Yi-Kweon
    • Animal cells and systems
    • /
    • 제16권1호
    • /
    • pp.34-40
    • /
    • 2012
  • Seven species of the genus $Melanaphis$ van der Goot are recognized in Korea, including $M.$ $sorini$ Halbert and Remaudi$\grave{e}$re new to Korea. Morphometric analysis is performed based on 27 major characteristics to determine the morphometric correlation between species and to suggest useful diagnostic characters in this species complex. We provide the identification key based on the results of the morphometric analysis.

우량.비우량 벤처비즈니스의 기업특성 (Firms' Characteristics between Highly Successful and Less Successful Venture Business)

  • 최상렬;노현섭
    • 경영과정보연구
    • /
    • 제6권
    • /
    • pp.163-186
    • /
    • 2001
  • A venture business plays important roles in the economy of a developing nation. It makes highly value-added product, increases employment and improves the industry structure. The objective of this study is to derive the financial and non-financial characteristics from venture businesses, which determine a highly successful business group or a less successful business group. The firm characteristics are composed of 21 financial(liquidity, leverage, cash flow, activity, productivity, and etc) and 34 non-financial characteristics(manager, technology, marketability and credibility variables), which have been considered as the key characteristics for venture business by the existing literature. All financial ratios and non-financial characters play a role of making discriminations between a highly successful and a less successful group. Because there are not generally accepted definitions, classifying a highly successful and a less successful venture business is a very difficult problem. Operational definitions have many problems but we have no choice in current stage.

  • PDF

Systematic Study of the Genus Grapholita Treltschke (Lepldoptera, Tortricidae) from Korea

  • 배양섭;박규택
    • Animal cells and systems
    • /
    • 제1권4호
    • /
    • pp.539-548
    • /
    • 1997
  • Seven species of the genus Grapholita Treitschke, 1829 are recognized from Korea. Among them, G. funebrana (Treitschke) and G. sp. 1 are reported for the first time from Korea. The previously cited species with uncertainty of its distribution in the Korean peninsula, G. inopinata Heinrich, has not been found, and thus determined absent in the Republic of Korea. All the known species are redescribed with illustrations of adults, including genitalia of both sexes. Their known host plants are also listed. A key to the species of the genus, based on external and male genitalic characters, is given.

  • PDF

한국산 점톨물방개속(딱정벌레목 : 물방개과)의 분류학적 연구 (Taxonomy of Korean Hydrovatus Motschulsky (Coleoptera: Dytiscidae))

  • 이대현;안기정
    • 한국응용곤충학회지
    • /
    • 제55권4호
    • /
    • pp.343-346
    • /
    • 2016
  • 한국산 점톨물방개속(Hydrovatus Motschulsky)의 분류학적 연구를 수행하였다. 2종이 발견되었으며, 노랑점톨물방개(H. acuminatus Motschulsky)를 국내에서 처음 보고한다. 본 속의 각 2종에 대한 성충의 외형 사진 및 식별 형질과 검색표를 제시한다.

새코미꾸리속 Koreocobitis 어류의 1 신종 및 새코미꾸리 K. rotundicaudata 의 재기재 (A New Species of Koreocobitis from Korea with a Redescription of K. rotundicaudata)

  • 김익수;박종영
    • 한국어류학회지
    • /
    • 제12권2호
    • /
    • pp.89-95
    • /
    • 2000
  • 한국산 새코미꾸리속 Koreocobitis에는 새코미꾸리 Koreocobitis rotundicaudata와 얼룩새코미꾸리 (신종) K. naktongensis 2종이 분포한다. 신종인 얼룩새코미꾸리는 새코미꾸리에 비해 갈색의 얼룩무늬반점, 절단형의 꼬리지느러미 후연, 척수골 수의 감소, 긴 두부 등에서 형태적인 뚜렷한 차이를 보여 주고 있으며, 낙동강에만 제한 분포하고 있어 생물지리적으로 주목된다. 또한 이들 2종에 대한 검색표와 함께 형태적 특징을 기재하였다.

  • PDF

풀잠자리과 한국 미기록종 Italochrysa nigrovenosa Kuwayama (풀잠자리목) (Italochrysa nigrovenosa Kuwayama, an Undescribed Species (Neuroptera:Chrysopidae) New to Korea)

  • 김슬기;조수원
    • 한국응용곤충학회지
    • /
    • 제54권3호
    • /
    • pp.271-274
    • /
    • 2015
  • 그 동안 한국 풀잠자리과 Italochrysa속은 오직 1종만이 기록되었으나, 한국 미기록종인 몸노랑풀잠자리(Italochrysa nigrovenosa Kuwayama, 신칭)의 국내 분포를 추가로 보고한다. 이 종에 대한 간략한 기재와 속내 분류키, 그리고 암컷 성충과 생식기의 사진을 제공한다.

New distribution records of two rare species of Cynanchum (Apocynaceae) in South Korea: Cynanchum thesioides (Freyn) K. Schum. and Cynanchum chinense R. Br.

  • NAM, Bo-Mi;YANG, Sungyu;CHUNG, Gyu Young
    • 식물분류학회지
    • /
    • 제50권1호
    • /
    • pp.1-7
    • /
    • 2020
  • Cynanchum L. in the subfamily Asclepiadoideae (Apocynaceae) includes four recognized species on the Korean peninsula, two of which are native to South Korea. However, the species ranges in South Korea are poorly defined. During a field survey, we discovered C. thesioides, previously unrecorded in South Korea, in Gimpo-si, Gyeonggi-do, and found an additional population of C. chinense, for which only one population has been reported in South Korea. The two taxa are considered rare species with extremely restricted distributions in South Korea, especially C. thesioides. We provide fundamental information, including descriptions, images of the habitats and morphological characters, and a taxonomic key for identification and assessments of the conservation status of Cynanchum species in Korea.

A New Record of Adenostemma madurense DC. (Asteraceae) in Korea

  • Jeong, Keum Seon;Heo, Tae Im;Lee, Kang Hyup;Choi, Kyung;Kim, Hyuk-Jin
    • 한국자원식물학회지
    • /
    • 제30권3호
    • /
    • pp.331-334
    • /
    • 2017
  • Adenostemma madurense DC. (Asteraceae, Adenostemma L.), which is known to be distributed in Japan, Taiwan, Thailand and Nepal was recently found on Jeju Island in Korea. It is morphologically allied to A. madurense but distinguished from A. lavenia (L.) Kuntze by having such characters as broadly ovate or ovate to oblong leaves, $15-21cm\;long{\times}7-12cm$ wide and smooth achenes with slightly muricate at the upper. Furthermore, A. madurense is found in dry mountain slopes in evergreen forests while Adenostemma lavenia occures in the wetland and side of pond. This taxon was named 'San-mul-meo-wi' in Korean based on its habitat. We provide a description, illustrations, photographs, and the key to the related species in Korea.

한국산 바닷말반날개속(딱정벌레목 반날개과 반날개아과)의 분류학적 연구 (The Korean Species of the Intertidal Genus Cafius (Coleoptera, Staphylinidae, Staphylininae))

  • Jeon, Mi-Jeong;Ahn, Kee-Jeong
    • Animal Systematics, Evolution and Diversity
    • /
    • 제18권1호
    • /
    • pp.65-74
    • /
    • 2002
  • 한국산 바닷말반날개속 (Cafius)의 분류학적 연구를 수행하였다. 전세계에 45종이 분포하며 모두 바닷가에서 발견된다. 국내에서 처음으로 기록되는 3종 [C. algarum (Sharp), C. mimulus (Sharp), C. rufescens Sharp]을 포함하여 5종을 보고한다. 이들의 검색표. 기재, 주요형질의 그림을 제시하였다

수리형태학을 이용한, 잡영이 많은 한글 문자의 자소분리 및 인식에 관한 연구 (A study on the Recognition of Noisy Korean Character Utilizing Mathematical Morphology)

  • 최환수;정동철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1996년도 하계학술대회 논문집 B
    • /
    • pp.1392-1394
    • /
    • 1996
  • This paper presents an algorithm to separate vowels from consonants in Korean characters captured in noisy images and to recognize them. The algorithm has been originally developed for the recognition of the usage code (which is represented by a single Korean character) in the license plates or Korean vehicles. It, however, could be easily adopted to other applications with minor changes, in which character recognition is needed and the environment is noisy. The key ideas or the algorithm are to localize the vowels utilizing the Hough transformation and to separate the vowels from consonants utilizing mathematical morphology. We observed that the presented algorithm effectively separates vowels even if the vowels and consonants are joined together after thresholding. We also observed that our algorithm outperforms some conventional algorithms especially when the input images are noisy. The details of the comparison study are presented in the paper.

  • PDF