This paper presents a computer-based analytical framework for the spatio-temporal evolution of urban systems using the ideas from the allometric growth associated with fractals. Both cities as systems and systems of cities follow the law of allometric growth, and the scaling factors of the allometric relations can compose the matrix equations as eigenfunctions. The fractal dimension arrays are ...

The allometric relationship between body mass and gonad mass in males of 23 fish species from 11 families was examined. There was no evidence of a single allometry for all fishes. A cross species analysis suggested a scaling coefficient of 1 04, which was significantly different from a previous study that reported a scaling coefficient of 0 904. A within species analysis generated scaling coeff...

Allometry, in general biology, measures the relative growth of a part in relation to the whole living organism. Left ventricular hypertrophy (LVH) is the heart adaptation to excessive load (systolic or diastolic). The increase in left ventricular mass leads to an increase in the electrocardiographic voltages. Based on clinical data, we compared the allometric behavior of three different ECG mar...

HIGHLIGHTS Ruditapes decussatus from four sites belonging to Monastir bay (Tunisia) was first time analyzed based on morphometry and comparative statistics. The site of Ksiba distinguishable other by larger heavier specimens. sub-trapezoidal shape dominant with small- size classes, in most sites. principal component analysis (PCA) revealed different population groups, two intra-population group...

Metabolism of living organisms is a foundation of life. The metabolic rate (energy production per unit time) increases slower than organisms' mass. When this phenomenon is considered across different species, it is called interspecific allometric scaling, whose causes are unknown. We argue that the cause of interspecific allometric scaling is the total effect of physiological and adaptation mec...

Lifetime breast cancer risk reflects an unresolved combination of early life factors including diet, body mass index, metabolic syndrome, obesity, and age at first menses. In parallel, the onset of allometric growth by the mammary glands around puberty is widely held to be estrogen (E)-dependent. Here we report that several physiological changes associated with metabolic syndrome in response to...

Objective criteria are needed for defining, in various animal species, changes occurring at puberty. Particularly required are estimates of the relationship of alterations in the growth of the whole body to the sex organs and the secondary sexual characteristics. A procedure that has been widely employed has been to plot testicular weight as a function of time and to observe inflection points.'...

The allometric-constraint hypothesis states that evolutionary divergence of morphological traits is restricted by integrated growth regulation. In this study, we test this hypothesis on a time-calibrated and well-documented palaeontological sequence of dental measurements on the Pleistocene arvicoline rodent species Mimomys savini from the Iberian Peninsula. Based on 507 specimens representing ...

Allometric morphogenesis is the generation of form or pattern as a result of differential growth according to power-law relationships among the elements of a complex system. This phenomenon has been noted in a variety of fields for many years, in some cases for centuries, and yet it has never been related to the underlying determinants of the systems. By starting with fundamental properties of ...