Results 221 to 230 of about 1,147,152 (263)
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Evolution in a Time-Varying Environment
Science, 1977A simple model of competition in a time-varying environment was developed and used to discuss the evolution of life-history strategies.
R A, Armstrong, M E, Gilpin
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Time evolution in statistical mechanics
Lettere Al Nuovo Cimento Series 2, 1974One of t h e f irst s tcps in t h e c o n s t r u c t i o n of r igo rous s t a t i s t i c a l d y n a m i c s is to p r o v e t h e ex i s t ence of t h e t i m e e v o l u t i o n . T he p ionee r ing p a p e r in t h i s d i r ec t ion is due to LANFORD (1.2).
C. MARCHIORO +2 more
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Evolution, development and timing of puberty
Trends in Endocrinology & Metabolism, 2006The age of menarche has fallen as child health has improved. Although there is ample evidence of delayed puberty being associated with poorer childhood nutrition, menarche is also influenced by prenatal factors. In particular, early onset of puberty is reported in children who have migrated from developing to developed countries.
Gluckman, Peter D., Hanson, Mark A.
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Changing times: The evolution of puberty
Molecular and Cellular Endocrinology, 2006An evolutionary and life history perspective is used to consider the evolution of puberty. The age of menarche would have evolved by the Neolithic to be matched to social maturity. It is suggested that in developed countries menarche is now returning to a similar age as in the Neolithic as infection and undernutrition, features of post-Neolithic ...
Gluckman, P.D., Hanson, M.A.
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Time evolution of the Lamb shift
Optics Letters, 2010The time evolution of the Lamb shift that accompanies the real photon emission is studied for the first time (to our knowledge). The investigation of the explicit time dependence of the Lamb shift becomes possible because the self-energy of the free electron, which is divergent, is subtracted from the Hamiltonian after a unitary transformation.
Da-Wei, Wang +4 more
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Time of Evolution and the Spirit of the Times
Diogenes, 1979The sociology of knowledge is faced with a problem of historical temporality that it has carefully avoided up until now. The subject has been avoided or ignored because a discussion of it in depth would run the risk of questioning all modern scientific thought. The problem is that of the concept of absolute time as it is used in evolutionist theory. In
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Time evolution of vortex lines
Physical Review D, 1990We study the motion of a circular vortex line, following the time evolution of its average radius. In the zero-width limit we obtain Nambu's equation. Up to the next order in the string width we obtain a dynamical equation that may be assimilated to the equation of an elastic string with a velocity-dependent string tension.
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Time, tourism area ‘life-cycle,’ evolution and heritage
Journal of Heritage Tourism, 2021Sagar Singh
exaly