Search Results - (Author, Cooperation:A. Purvis)

Showing 1 - 11 results of 11, query time: 0.19s Refine Results
  1. 1
    O. R. Bininda-Emonds ; A. Purvis
    American Association for the Advancement of Science (AAAS)
    Published 2012
    Staff View
    Publication Date:
    2012-07-07
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; *Extinction, Biological ; *Fossils ; *Mammals ; *Phylogeny
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2015-04-04
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; *Biodiversity ; Conservation of Natural Resources/trends ; Ecology/trends ; History, 16th Century ; History, 17th Century ; History, 18th Century ; History, 19th Century ; History, 20th Century ; History, 21st Century ; *Human Activities ; Models, Biological ; Population Dynamics ; Species Specificity
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    T. H. Ezard ; T. Aze ; P. N. Pearson ; A. Purvis
    American Association for the Advancement of Science (AAAS)
    Published 2011
    Staff View
    Publication Date:
    2011-04-16
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Biodiversity ; *Biological Evolution ; *Climate Change ; *Ecosystem ; Extinction, Biological ; *Foraminifera/cytology/genetics/physiology ; *Fossils ; *Genetic Speciation ; Phylogeny ; Plankton/cytology/genetics/physiology ; Time
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Gapper, G. R. ; Hewish, A. ; Purvis, A. ; Duffett-Smith, P. J.

    [s.l.] : Nature Publishing Group
    Published 1982
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] The measurements were carried out at 81.5 MHz with the 3.6-hectare Array which enables sources to be observed simultaneously at meridian transit over a wide range of declinations2. Intensity scintillation in the band 0.1-3 Hz was detected, averaged and sampled at intervals of 10 s on to magnetic ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] The normal plasma protein serum amyloid P component (SAP) binds to fibrils in all types of amyloid deposits, and contributes to the pathogenesis of amyloidosis. In order to intervene in this process we have developed a drug, ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Purvis, A. ; Gittleman, J.L. ; Luh, H.-K.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0022-5193
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    0167-9317
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    BARMORE, C. R. ; PURVIS, A. C. ; FELLERS, P. J.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1983
    Staff View
    ISSN:
    1750-3841
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Decaying grapefruit (Citrus paradisi Macf.) stored under nonventilated conditions caused a substantial reduction in the oxygen and an increase in the carbon dioxide concentrations in the atmosphere. A comparable increase in the internal carbon dioxide concentration of sound fruit in the same container was also observed. Low oxygen caused an increase in the ethanol concentration in the juice of the sound fruit and the development of an undesirable stale flavor. Containment of the decaying fruit in polyethylene film limited the oxygen depletion. Thus, flavor quality of sound fruit from the containers with PE film-sealed decaying fruit was comparable to that of sound fruit stored in the absence of decaying fruit.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Lo, K. C. ; Purvis, A.
    Springer
    Published 1997
    Staff View
    ISSN:
    1531-5878
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Notes:
    Abstract Random sampling is one of the methods that can overcome the Nyquist limit when evaluating a frequency spectrum of a signal. However, the computational complexity becomesN 2 as the FFT cannot be used. A new approach, called hybrid additive random sampling, is proposed. This new scheme is devised by concatenating random sampling sequences in such a way that symmetry is created in the transform kernel for reducing the computational effort while the anti-alias property is maintained. A savings of the least 75% in computation is achieved. The sampling scheme is also found to be suitable for parallel implementation. In this paper, the algorithms for generating the sampling sequence and evaluating the spectrum are described in detail. The performances of the scheme in terms of noise, accuracy, etc., are compared with genuine random sampling and another approach proposed previously. The advantages and limitations are included.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Kelly, C. K. ; Purvis, A.
    Springer
    Published 1993
    Staff View
    ISSN:
    1432-1939
    Keywords:
    Taxonomic relatedness ; Seed size ; Seedling establishment conditions ; Tropical trees ; Comparative ecology
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Within a multi-species study, species do not necessarily represent independent data points. The data set used by Foster and Janson (1985) to look at the relationship between seed size and establishment conditions for naturally occurring tropical trees was re-analyzed, to take into account the effect of relatedness among species. The re-analysis showed that 1) this data set does not support the hypothesis that large-seeded species are more likely to establish in small gaps or shade than are small-seeded species, and 2) more than 1/3 (16 of 39) of the data points were extraneous to the test of the hypothesis. It is recommended that all ecologists, and not just those interested in evolutionary questions, consider species relatedness prior to inception of any multi-species study.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Berrigan, D. ; Purvis, A. ; Harvey, P. H. ; Charnov, E. L.
    Springer
    Published 1993
    Staff View
    ISSN:
    1573-8477
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses