Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2000-2004  (2)
  • Nestmate recognition  (1)
  • PACS. 71.23.Cq Amorphous semiconductors, metallic glasses, glasses – 71.15.Pd Molecular dynamics calculations (Car-Parrinello) and other numerical simulations – 73.61.Jc Amorphous semiconductors; glasses  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 22 (2001), S. 443-453 
    ISSN: 1434-6036
    Keywords: PACS. 71.23.Cq Amorphous semiconductors, metallic glasses, glasses – 71.15.Pd Molecular dynamics calculations (Car-Parrinello) and other numerical simulations – 73.61.Jc Amorphous semiconductors; glasses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We propose a method to simulate a-Si and a-Si:H using an ab initio approach based on the Harris functional and thermally-amorphisized periodically-continued cells with at least 64 atoms. Hydrogen incorporation was achieved via diffusive addition. In preparing samples that may simulate the distributions of atoms in the amorphous materials, simulated annealing calculations were carried out from given starting conditions using short and long time steps. The different time-steps led to samples having distinctly different topological disorder. The radial distribution functions (partial and total) of the resulting samples were calculated and compared with measured distributions; the agreement is very good. These comparisons allowed some tentative conclusions to be made as regards the kind of disorder prevailing in the real samples. In addition, we studied the effect of the topological disorder on the electronic densities of states of the samples; the passivating effect of hydrogen can be observed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1439-5444
    Keywords: Key wordsLasius spp. ; Temporary parasitic ant ; Naturally mixed colony ; Nestmate recognition ; Cuticular profiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Workers of the temporary parasitic ant Lasius sp. were perfectly compatible with their hosts Lasius fuliginosus. Aggression was never seen between allospecific nestmates in either field or laboratory. In the laboratory, trophallaxis and allogrooming between allospecific nestmates were statistically more frequent than that between conspecifics. These ants were highly aggressive toward individuals of either species from another mixed colony located 1 km away, indicating that they discriminated nestmates and nonnestmates regardless of the species to which they belonged. No aggressive actions, however, were observed between two neighboring mixed nests located 5 m apart. We have not considered, however, the relationship of the two neighboring nests: the two nests may have been two subunits of the same family or sister colonies, or may have been different colonies but discriminated from distant aliens. Gas chromatography analysis on the total cuticular extracts showed that Lasius sp. and L. fuliginosus possess distinct cuticular profiles, even though they were collected from the same mixed colony.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...