Based on Schumpeter’s process of creative destruction, we propose a qualitative model the cyclic introducing new technologies. The consists variable structure system with switchings between three globally stable dynamical subsystems. regimes make it possible to describe departing from equilibrium state in alternation implies lack for despite global stability its This mathematical fact correspon...

The overall reproductive performance has decreased over the last decades, involving changes in cyclicity, oestrous behaviour and fertility. High milk yield (MY), low body condition score (BCS) and large body condition (BC) loss have been identified as risk factors. However, these effects are often confounded, as high MY and body lipid reserve mobilization are correlated. The aim of this study w...

OBJECTIVE To determine the effect of cinnamon on menstrual cyclicity and metabolic dysfunction in women with polycystic ovary syndrome (PCOS). STUDY DESIGN In a prospective, placebo controlled, double-blinded randomized trial, 45 women with PCOS were randomized (1:1) to receive cinnamon supplements (1.5 g/d) or placebo for 6 months. Menstrual cyclicity (average cycles/month) during the 6 mont...

Light-dark (LD) cyclicity contributes to a number of reproductive events in the rat, including estrus cyclicity, and the timing of parturition and postpartum estrus. Constant light (LL) disrupts the female's cyclicity, and fertility is typically diminished. To ascertain whether constant light similarly diminishes the fertility of postpartum females, LL and LD animals were compared over three su...

The article argues that the EPP should be eliminated. It is shown that in a number of constructions the EPP does not hold at all. Where it does appear to hold, its effects follow from independent mechanisms of the grammar. EPP effects concerning the final landing site of A-movement follow from Case theory. Intermediate [Spec,IP]s are filled as a result of the requirement of successive cyclicity...

The non-commutative geometry of deformation quantization appears in string theory through the effect of a B-field background on the dynamics of D-branes in the topological limit. For arbitrary backgrounds, associativity of the star product is lost, but only cyclicity is necessary for a description of the effective action in terms of a generalized product. In previous work we showed that this pr...

The synergistic effects of fishing, climate and internal dynamics on population fluctuations are poorly understood due to the complexity of these interactions. In this paper, we combine time series analysis and simulations to investigate the long-term dynamics of an overexploited population in the Mediterranean Sea, and its link with both fishing-induced demographic changes and hydroclimatic va...