Similar Search Results

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 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

Multiscale entropy-based methods for heart rate variability complexity analysis

Silva, Luiz Eduardo Virgilio; Cabella, Brenno Caetano Troca - In: Physica A: Statistical Mechanics and its Applications 422 (2015) C, pp. 143-152

Physiologic complexity is an important concept to characterize time series from biological systems, which associated to … complexity metrics as function of time scales. Complexity metrics are derived from nonadditive entropy supported by generation of … surrogate data, i.e. SDiffqmax, qmax and qzero. In order to access accuracy of proposed complexity metrics, receiver operating …

Persistent link: https://www.econbiz.de/10011194017

EMD based refined composite multiscale entropy analysis of complex signals

Wang, Jing; Shang, Pengjian; Xia, Jianan; Shi, Wenbin - In: Physica A: Statistical Mechanics and its Applications 421 (2015) C, pp. 583-593

Multiscale entropy (MSE) is an effective method to measure the complexity of signals from complex systems, which has … complexity measurement. Thus we introduce an empirical mode decomposition based RCMSE, called EMD–RCMSE to first eliminate such … effects of trends and then measure the complexity of signals. It is validated from simulated signals and has good estimation …

Persistent link: https://www.econbiz.de/10011194044

Complexity measures and self-similarity on spreading depression waves

Piqueira, José Roberto C.; Lima, Vera Maura Fernandes de; … - In: Physica A: Statistical Mechanics and its Applications 401 (2014) C, pp. 271-277

the circular wave formations. Shiner–Davison–Landsberg (SDL) complexity measure framework has been used in several … were collected in two different spatial scales. The SDL complexity was calculated for the data and two main results …

Persistent link: https://www.econbiz.de/10010871856

The effect of microscopic correlations on the information geometric complexity of Gaussian statistical models

Ali, S.A.; Cafaro, C.; Kim, D.-H.; Mancini, S. - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 16, pp. 3117-3127

We present an analytical computation of the asymptotic temporal behavior of the information geometric complexity (IGC … connection between (micro)correlations and (macro)complexity in Gaussian statistical dynamical systems. …

Persistent link: https://www.econbiz.de/10010871921

On the relation between correlation dimension, approximate entropy and sample entropy parameters, and a fast algorithm for their calculation

Zurek, Sebastian; Guzik, Przemyslaw; Pawlak, Sebastian; … - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 24, pp. 6601-6610

these complexity algorithms and show explicitly that the above parameters are intimately connected and mutually … can be used in medical applications of complexity theory, as it can calculate all three parameters for a realistic …

Persistent link: https://www.econbiz.de/10010872055

A power-law distribution for tenure lengths of sports managers

Aidt, Toke S.; Leong, Bernard; Saslaw, William C.; … - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 2, pp. 697-703

We show that the tenure lengths for managers of sport teams follow a power law distribution with an exponent between 2 and 3. We develop a simple theoretical model which replicates this result. The model demonstrates that the empirical phenomenon can be understood as the macroscopic outcome of...

Persistent link: https://www.econbiz.de/10010872143