• Title/Summary/Keyword: Spider

Search Result 516, Processing Time 0.034 seconds

TNC-PDA Data Communication System in mobile Ad-hoc Network (무선 Ad-hoc 망에서 TNC-PDA 데이터 통신시스템)

  • 김정우;채종우;정목동
    • Proceedings of the Korea Multimedia Society Conference
    • /
    • 2003.11a
    • /
    • pp.478-481
    • /
    • 2003
  • 컴퓨터만을 이용하던 데이터 통신의 개념이 이제는 흠 네트워킹 개념으로 확대되었고 통신 방법도 전력선, 광케이블, 무선 등을 이용하는 방식으로 발전되고 있으며, 핸드폰을 이용한 통신에서 노트북이나 PDA를 이용한 무선 네트워크로 바뀌고 있는 실정이다. 이러한 변화는 일반사회에서는 Ad-hoc 네트워킹에 대한 연구를 발전시키고 있으며, 군사적으로는 C4I, Spider 체계등 군사적 목적의 무선 네트워킹 개념이 연구되고 있다. 본 논문에서는 이런 무선 네트워킹을 AX.25 Protocol을 기반으로 한 TNC와 PDA를 이용 모바일 무전기 데이터 통신 시스템을 구현하고, 이에 대한 성능평가를 통해 Ad-hoc 통신망에서 TNC를 이용한 PDA 무전기를 제안한다.

  • PDF

Three new species and four new records of the families Cybaeidae and Gnaphosidae (Araneae) from Korea

  • Seo, Bo Keun
    • Journal of Species Research
    • /
    • v.6 no.spc
    • /
    • pp.114-124
    • /
    • 2017
  • Seven species of the families Cybaeidae and Gnaphosidae are reported. Cybaeus auriculatus n. sp., C. parvus n. sp. and Haplodrassus miryangensis n. sp. are described from Gyeongsang-do, Korea. Drassodes platnicki Song, Zhu and Zhang, 2004, Haplodrassus hatsushibai Kamura, 2007, Zelotes eskovi Zhang and Song, 2001 and Z. xiaoi Yin, Bao and Zhang, 1999 are newly recorded to the spider fauna of Korea.

Base analysis of deoxyribonucleic acid of several insects and spider testis (몇가지 곤충 및 지주의 정소 DNA 염기에 관한 연구)

  • Lee, Ki-Yung;Choe, Byong-Hee
    • Journal of Sericultural and Entomological Science
    • /
    • v.6
    • /
    • pp.39-41
    • /
    • 1966
  • 가잠(용체), 멧뚜기 2종 및 지주 1종에서 각각 정소를 적출하여 DNA를 순수분리하고 DNA염기를 정량분석하여 다음과 같은 결과를 얻었다. (1) 가잠(용체) 및 멧뚜기 류의 정소 DNA의 A+T/G+C 비는 각각 1.72, 1.67로서 이 염기화는 게(해)정소 DNA의 그것과 거의 같고 새우의 것과는 다르다. (2) 지주정소 DNA의 A+T/G+C 비는 1.57로서 게(해)와 비슷하다. (3) 곤충 및 지주 정소 DNA에서 methylcystosine을 발견못하였다.

  • PDF

A Newly Recorded Species of the Genus Nesticella (Aranea, Nesticidae) in Korea (한국산 쇠굴아기거미속 (거미목, 굴아기거미과)의 1미기록종)

  • 김주필;유정선;이영보
    • Animal Systematics, Evolution and Diversity
    • /
    • v.15 no.2
    • /
    • pp.183-187
    • /
    • 1999
  • One nesticid spider, Nesticella mogera (Yaginuma, 1972), collected from a paddy field is reported for the first time from Korea. The species is closely allied to Nesticella brevipes (Yaginuma, 1970), but is characterized by its male paracymbium and female epigynal scape.

  • PDF

Four Species of Jumping Spiders (Areaneae: Salticidae) from China

  • Xian-Jin Peng;Joo-Pil Kim
    • Animal cells and systems
    • /
    • v.2 no.4
    • /
    • pp.411-414
    • /
    • 1998
  • One novel species, Phaeacius yunnanensis n. sp. and three species new to China, Brettus albolimbattus, Hyllus lacertosus and Ptocasius kinhi of the jumping spider.belonging to the family Salticidae, are described based on the materials collected from Yunnan Province, China. The new species is similar to Phaecius lancerarius, but can be distinguished by secondary conductor covers on the emblus. That of the latter below the emblous, retro1aterial tibial apophysis, is much more slender and with an abdominal pattern.

  • PDF

Process Design of Automobile Steering Yoke with burring (버링 가공을 이용한 자동차 요크 제품의 가공 공정 설계)

  • 김병민
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2000.04a
    • /
    • pp.151-154
    • /
    • 2000
  • The yoke is used for joining the mechanical element of a spider and shaft in the steering system of automobiles. Conventional yoke forming processes are too complicated such as 4 stages bending and forming. The weight of yoke is also heavy than other components. New process is necessary to reduce the product weight to improve the strength and to reduce the costs. Process designed to reduce number of forming stages and to reduce its weight. To check the strength the stress analyses are performed between conventional yoke and developed one.

  • PDF

Use of Generalized Linear Mixed Model for Pest Density in Repeated Measurement Data

  • Park, Heung-Sun;Cho, Ki-Jong
    • Proceedings of the Korean Statistical Society Conference
    • /
    • 2003.05a
    • /
    • pp.69-74
    • /
    • 2003
  • The estimation of pest density is a prime concern of Integrated Pest Management (IPM) because the success of artificial intervention such as spraying pestcides or natural enemies depends on pest density. Also, the spatial pattern of pest population within plants or plots has been studies in various ways. In this study, we applied generalized linear mixed model to Tetranychus urticae Koch , two-spotted spider mite count in glasshouse grown roses. For this analysis, the subject-specific as well as pupulation-averaged approaches are used.

  • PDF

Studies on the Mites (III) -Mites of Persimmon and Citrus Trees- (엽비의 연구(III) -감나무와 귤나무의 응애류에 대하여-)

  • Han Kyo Pil
    • Korean journal of applied entomology
    • /
    • v.9 no.1
    • /
    • pp.33-35
    • /
    • 1970
  • The author collected 2 species of spider mites from persimmon and citrus trees in Taegu and Chun Chon during the summer of 1961 and 1969. Tenuipalpus japonicus collected from persimmon trees and Panonychus citri collected from citrus trees in and from trifoliate orange trees. In 1958 and 1961 Dr. E. S. Lee recorded four phytophagous species, i.e. Panonychus ulmi, Tetranychus pacificus, Tetranychus urticae and Bryobia praetiosa.

  • PDF