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  • Articles  (30)
  • Natural Sciences in General  (28)
  • Biology  (28)
  • Computer Science  (5)
  • Energy, Environment Protection, Nuclear Power Engineering  (2)
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  • Articles  (30)
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  • 1
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    Forest fires: An example of self-organized critical behavior (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-22
    Description: Despite the many complexities concerning their initiation and propagation, forest fires exhibit power-law frequency-area statistics over many orders of magnitude. A simple forest fire model, which is an example of self-organized criticality, exhibits similar behavior. One practical implication of this result is that the frequency-area distribution of small and medium fires can be used to quantify the risk of large fires, as is routinely done for earthquakes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malamud -- Morein -- Turcotte -- New York, N.Y. -- Science. 1998 Sep 18;281(5384):1840-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences, Cornell University, Ithaca, NY 14853-1504, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9743494" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Geophysical Geodesy. The Slow Deformations of the Earth. Kurt Lambeck. Clarendon (Oxford University Press), New York, 1988. xii, 718 pp., illus. $135; paper, $55 (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-05-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turcotte, D L -- New York, N.Y. -- Science. 1989 May 26;244(4907):995.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17731887" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
    Electronic Resource
    Electronic Resource
    Increased Estimate for Heat Flow at Oceanic Ridges (1969)
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 1354-1355 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Considering one half of a symmetrical model for a mid-ocean ridge, the formation of new crust by igneous activity requires the release of heat at a rate, Q^ where (?*〉 = wAp(£ + (7pAjP) andi£ is the half spreading rate, h is the thickness of the igneous material in the crust, p its ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2231354a0
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  • 4
    Electronic Resource
    Electronic Resource
    A scale-invariant approach to flood-frequency analysis (1993)
    Springer
    Stochastic environmental research and risk assessment 7 (1993), S. 33-40 
    Details
    ISSN: 1436-3259
    Keywords: Fractal ; flood-frequency ; scale-invariant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract In order to study historical flood-frequency records we plot the log of the number of floods on a river per unit time in which the peak discharge exceeds a specified value against the log of that value. For ten benchmark stations we find good correlations with scale-invariant (fractal) statistics. We suggest that the underlying physical processes associated with the generation of floods are sufficiently scale invariant over time scales from one to one hundred years that they provide a rational basis for the application of scale-invariant statistics. Our results fall within the range of flood-frequency estimates made by other statistical techniques. We propose that the ratio of the ten-year peak discharge to the one-year peak discharge β is a quantitative measure of flood potential. With scale invariance β is also the ratio of the one-hundred year flood to the ten-year flood. We find that the values of β for ten stations on rivers throughout the country range from 2.04 to 8.11 and find strong regional variations that can be correlated in terms of climate. Our results are consistent with the observed fractal statistics in sedimentary sections. We have also carried out R/S analyses for the ten stations and have obtained values of the Hurst exponent. We find that the Hurst exponent cannot be used for flood-frequency forecasting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01581565
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  • 5
    Electronic Resource
    Electronic Resource
    Collapse of loaded fractal trees (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 671-672 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a simple example of a fractal tree we consider the two-dimensional structure shown in Fig. 1 and its failure under the application of a vertical load V. Without any failure, the load on each leg of order n is Vn = V/2n cos q/2. We hypothesize that the legs have a statistical distribution of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313671a0
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  • 6
    Electronic Resource
    Electronic Resource
    Geochemistry: Mantle heterogeneity and convection (1983)
    [s.l.] : Nature Publishing Group
    Nature 305 (1983), S. 278-279 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE nature of mantle heterogeneity and its geodynamic significance was the subject of a recent symposium* catalysed by the presentation of the first on-shore results of IPOD Leg 82 of the Glomar Challenger drilling. The Leg had been designed to study in time and space mantle heterogeneity ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/305278a0
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence for chaotic fault interactions in the seismicity of the San Andreas fault and Nankai trough (1990)
    [s.l.] : Nature Publishing Group
    Nature 348 (1990), S. 234-236 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Earthquakes in a zone of crustal deformation are a complex phenomenon. A standard procedure for determining whether a complex system exhibits chaotic behaviour is to study a low-order analogue model. A widely recognized analogue model for seismic faulting is a spring-loaded slider-block system (see ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/348234a0
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  • 8
    Electronic Resource
    Electronic Resource
    Mid-plate Tectonics (1973)
    [s.l.] : Nature Publishing Group
    Nature 244 (1973), S. 337-339 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] There are many examples of mid-plate tectonics which require an explanation. Oceanic island chains, continental graben and rift valleys, and features which pass from continental areas into oceanic parts of the same plate, are particularly important. We argue that these are the result of crustal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/244337a0
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  • 9
    Electronic Resource
    Electronic Resource
    Evolution of the Moon's orbit and the origin of life (1974)
    [s.l.] : Nature Publishing Group
    Nature 251 (1974), S. 124-125 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 a, Data on the number of solar days in a year from molluscan shells is compared with the dependence we predicted and the value deduced from satellite observations (Newton11), b, Data on the number of solar days in a lunar month as in a. Error bars are standard deviations of the data, c, Data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/251124a0
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  • 10
    Electronic Resource
    Electronic Resource
    Implications of Convection within the Moon (1969)
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 250-251 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Convection within the Moon could explain several phenomena, including perhaps the occurrence of maria on the near side but not on the far ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/223250a0
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