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The scaling of maximum and basal metabolic rates of mammals and birds

Barbosa, Lauro A.; Garcia, Guilherme J.M.; Silva, … - In: Physica A: Statistical Mechanics and its Applications 359 (2006) C, pp. 547-554

metabolism. This unpredicted result sets a challenge that can decide which of the concurrent hypotheses is the correct theory …. Here, we show that both scaling laws can be deduced from a single network model. Besides the 3/4-law for basal metabolism …

Persistent link: https://www.econbiz.de/10010590575

Time rescaling and generalized entropy in relation to the internal measurement concept

Rojdestvenski, I; Cottam, M.G - In: Physica A: Statistical Mechanics and its Applications 278 (2000) 1, pp. 150-160

A phenomenon of rescaling of the internal time in systems with a finite number of states is discussed in the context of the internal measurement concept in biology. A connection between time rescaling and generalized statistics is established. Numerical examples are presented for simple model...

Persistent link: https://www.econbiz.de/10010590979

Heterogeneous distribution of metabolites across plant species

Takemoto, Kazuhiro; Arita, Masanori - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 13, pp. 2771-2780

We investigate the distribution of flavonoids, a major category of plant secondary metabolites, across species. Flavonoids are known to show high species specificity, and were once considered as chemical markers for understanding adaptive evolution and characterization of living organisms. We...

Persistent link: https://www.econbiz.de/10010591631

Are allometry and macroevolution related?

West, Bruce J.; West, Damien - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 10, pp. 1733-1736

The allometric relationship between the basal metabolic rate B and total body mass M is B = aMb, where the allometry coefficient a and the allometry exponent b have been fit to various data sets for over 150 years. The best fit of the allometry exponent to 391 mammalian species is given by...

Persistent link: https://www.econbiz.de/10011058810

The shape of the past in the World Wide Web: Scale-free patterns and dynamics

Jovani, Roger; Fortuna, Miguel A. - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 2, pp. 683-688

Human societies accumulate a great deal of information about past events. People make reference to things that happened in time in different ways and record them in multiple media. We have studied the current use of this information by analysing the frequency of occurrence of numbers associated...

Persistent link: https://www.econbiz.de/10010873322

The role of propagating stress waves on a geophysical scale: Evidence in terms of nonextensivity

Minadakis, G.; Potirakis, S.M.; Stonham, J.; Nomicos, C.; … - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 22, pp. 5648-5657

Laboratory experiments have shown that, during a fracture, the breaking of a bond launches a propagating stress wave which may trigger the breaking of other bonds. We examine here the possibility that the same holds on a geophysical scale. Based on a nonextensive approach, we examine whether the...

Persistent link: https://www.econbiz.de/10010873391

Multiscale entropy analysis of human gait dynamics

Costa, M.; Peng, C.-K.; L. Goldberger, Ary; Hausdorff, … - In: Physica A: Statistical Mechanics and its Applications 330 (2003) 1, pp. 53-60

We compare the complexity of human gait time series from healthy subjects under different conditions. Using the … recently developed multiscale entropy algorithm, which provides a way to measure complexity over a range of scales, we observe … that normal spontaneous walking has the highest complexity when compared to slow and fast walking and also to walking paced …

Persistent link: https://www.econbiz.de/10010873422

Statistical measures of complexity for quantum systems with continuous variables

Manzano, D. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 23, pp. 6238-6244

The Fisher–Shannon statistical measure of complexity is analyzed for a continuous manifold of quantum observables. It … characterization of the complexity of some quantum systems. In order to obtain a more complete description of complexity two new …

Persistent link: https://www.econbiz.de/10010874151

Information theoretic description of networks

Wilhelm, Thomas; Hollunder, Jens - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 1, pp. 385-396

We present a new information theoretic approach for network characterizations. It is developed to describe the general type of networks with n nodes and L directed and weighted links, i.e., it also works for the simpler undirected and unweighted networks. The new information theoretic measures...

Persistent link: https://www.econbiz.de/10010874248

Modelling gaze shift as a constrained random walk

Boccignone, Giuseppe; Ferraro, Mario - In: Physica A: Statistical Mechanics and its Applications 331 (2004) 1, pp. 207-218

of the simulations are compared with experimental data, and a notion of complexity is introduced to quantify the behavior …

Persistent link: https://www.econbiz.de/10010874404