• Title/Summary/Keyword: External morphology

Search Result 290, Processing Time 0.03 seconds

Numerical Simulation of Particle Deposition Pattern on Cylindrical Fiber under External Electrical Field (외부 전기장내의 단일 섬유에 대한 먼지층 형사 수치 모사)

  • 박현설;정용원;박영옥;이규원
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.15 no.1
    • /
    • pp.41-51
    • /
    • 1999
  • In this study, the two dimensional morphology of particle accumulates on a cylindrical fiber was numerically simulated when a uniform external electric field was present across a cylindrical fiber. In order to investigate the mechanism of linear dendrite formation which is observed under the above electrostatic condition, the electrostatic forces between a newly introduced particle and each deposited particle were calculated and compared with those between the particle and fiber As a result of this study it was found that dielectrophoretic forces between the oncoming particle and fiber play principal roles in linear dendrite formation.

  • PDF

First Report of Larval Damage to Liriope spicata by Mahasena aurea (Lepidoptera: Psychidae) in Korea with a Redescription of External Morphology of the Larva and Adult (개맥문동의 새로운 해충 검정주머니나방 (나비목: 주머니나방과) 유충의 발견 및 형태특징 재기재)

  • Roh, Seung Jin;Byun, Bong-Kyu
    • Korean journal of applied entomology
    • /
    • v.54 no.3
    • /
    • pp.263-270
    • /
    • 2015
  • In this study, one species of the bag moth, Mahasena aurea (Butler) (Lepidoptera: Psychidae), was found for the first time in Korea as a new insect pest on leaves of Liriope spicata (Thunb.) Lour. Also, the female larvae and adults of the species were first collected in this country. Larvae, pupae, and adults of both sexes are redescribed with illustrations of all external characteristics including the genitalia of the male.

Rearrangement of Korean Terms for Insect Head Morphology (곤충 머리 부위에 대한 우리말 용어 재조명)

  • Lee, Young In
    • Korean journal of applied entomology
    • /
    • v.57 no.4
    • /
    • pp.279-285
    • /
    • 2018
  • Different English terms indicating a same part in insect head were arranged according to position and function, and their corresponding different Korean terms were suggested. The terms include lines on head surface, head regions of embryo, external and internal skeletons, internal parts of mouth, long mouths, external parts and basic segments of antenna, antennal shapes, and hairs on surface.

A Study of Property on Trilateral Elevation in the Acute Angle Site

  • CHO, JAE-HEE
    • International Journal of Advanced Culture Technology
    • /
    • v.9 no.1
    • /
    • pp.22-27
    • /
    • 2021
  • Morphology of contemporary city streets is composed of overlapping infrastructures corresponding to the new street within the established organization, contemporary system, future circumstance, and population. As well, two overlaid organizations and morphological, historical, social and physical development lead to sharp acute algle(triangular) site, and the architecture in this site has a restriction on the availability of the internal space and the external design due to outside shape sharpness. We want to have a positive effect on the internal and external design of the architecture in the future by categorization of the shape and processing characteristics of the acute angle corner of the trilateral site. The characteristics and design categorization shown in this case study are as follows. Constitution a unique and independent form, lead streets and shape a exclusive image of the landscape, alleviate sharpness by configuring a acute angle point as a plane, use void to give reserve character, replace roundness for companionability to induce ambience in the road, embrace the characteristics of the site and create internal spaces and functions, emphasize the characteristics of each stairs, retain of uniqueness and highlight the characteristics of a vertical elements.

Molecular Signalling Mechanisms Involved in the Development of Fertilizing Capacity by Mammalian Spermatozoa

  • Jones, Roy
    • Korean Journal of Animal Reproduction
    • /
    • v.23 no.4
    • /
    • pp.353-358
    • /
    • 1999
  • Four important attributes for successful fertilization by a spermatozoon are (ⅰ) correct morphology, (ⅱ) correct presentation of egg recognition and fusion molecules, (ⅲ) progressive motility and (ⅳ), correct transfer of signalling molecules from sperm to egg for activation of development. In this presentation, these topics will be described and illustrated with emphasis on the endogenous control mechanisms that enable spermatozoa to respond to external signals. (omitted)

  • PDF

Eriophyid Mites Associated with Lycium chinese Mill in Korea (한국의 구기자에 기생하는 혹응애)

  • Lee, Won-Koo
    • The Korean Journal of Soil Zoology
    • /
    • v.11 no.1_2
    • /
    • pp.13-15
    • /
    • 2006
  • This report concerns with three species of eriophyid mites on Licium chinensis in Korea. Of them, the external morphology of Aceria tjyingi (Manson 1973) was observed with Scanning Electron Microscope. The author reviewed three species of Korean eryophid mites and suggests Korean names of Aceria kuko kishida, A. macrodonis Keifer, and A. tjyngi (Manson), respectively.

  • PDF