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  • 2000-2004  (3)
  • 1990-1994  (5)
  • 1985-1989  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Human sleep and circadian rhythms: a simple model based on two coupled oscillators (1987)
    Springer
    Journal of mathematical biology 25 (1987), S. 327-347 
    Details
    ISSN: 1432-1416
    Keywords: Sleep ; Circadian ; Human ; Model ; Oscillator
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract We propose a model of the human circadian system. The sleep-wake and body temperature rhythms are assumed to be driven by a pair of coupled nonlinear oscillators described by phase variables alone. The novel aspect of the model is that its equations may be solved analytically. Computer simulations are used to test the model against sleep-wake data pooled from 15 studies of subjects living for weeks in unscheduled, time-free environments. On these tests the model performs about as well as the existing models, although its mathematical structure is far simpler.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276440
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rhythmic research (1986)
    [s.l.] : Nature Publishing Group
    Nature 323 (1986), S. 363-363 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE ALL have clocks inside of us. These internal oscillators control the daily cycles of body temperature, sleep and wakeful-ness, hormone titre, metabolism and so on. Chronobiology is the study of such biological rhythms and the endogenous clocks which generate them. Although physiological ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/323363a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rhythm and reason (1987)
    [s.l.] : Nature Publishing Group
    Nature 329 (1987), S. 375-375 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Journal of Biological Rhythms. Editor Benjamin Rusak. Guilford Press, 72 Spring Street, New York, NY 10012. 4/yr. US $75 (institutional), $50 (individual); elsewhere $90 (institutional), $65 (individual). THE study of cycles has always attracted more than its share of crackpots. We are told ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/329375a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Exploring complex networks (2001)
    [s.l.] : Nature Publishing Group
    Nature 410 (2001), S. 268-276 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The study of networks pervades all of science, from neurobiology to statistical physics. The most basic issues are structural: how does one characterize the wiring diagram of a food web or the Internet or the metabolic network of the bacterium Escherichia coli? Are there any unifying principles ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35065725
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Linguistics Modelling the dynamics of language death (2003)
    [s.l.] : Nature Publishing Group
    Nature 424 (2003), S. 900-900 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Thousands of the world's languages are vanishing at an alarming rate, with 90% of them being expected to disappear with the current generation. Here we develop a simple model of language competition that explains historical data on the decline of Welsh, Scottish Gaelic, Quechua (the most common ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/424900a
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Book review (2000)
    Springer
    Bulletin of mathematical biology 62 (2000), S. 591-592 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bulm.1999.0164
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Book reviews (1989)
    Springer
    Bulletin of mathematical biology 51 (1989), S. 537-544 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02460089
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Book reviews (1994)
    Springer
    Bulletin of mathematical biology 56 (1994), S. 999-1008 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458278
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1992)
    Springer
    Bulletin of mathematical biology 54 (1992), S. 1083-1094 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02460668
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Amplitude death in an array of limit-cycle oscillators (1990)
    Springer
    Journal of statistical physics 60 (1990), S. 245-262 
    Details
    ISSN: 1572-9613
    Keywords: Nonlinear oscillator ; bifurcation ; phase transition ; mean-field model ; self-synchronization ; collective phenomena
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We analyze a large system of limit-cycle oscillators with mean-field coupling and randomly distributed natural frequencies. We prove that when the coupling is sufficiently strong and the distribution of frequencies has sufficiently large variance, the system undergoes “amplitude death”-the oscillators pull each other off their limit cycles and into the origin, which in this case is astable equilibrium point for the coupled system. We determine the region in couplingvariance space for which amplitude death is stable, and present the first proof that the infinite system provides an accurate picture of amplitude death in the large but finite system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01013676
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