Search results for "Sufficient time"
showing 3 items of 3 documents
Chemical heterogeneities in the mantle: The equilibrium thermodynamic approach
2016
Abstract This study attempts to answer a simple and yet fundamental question in relation to our understanding of the chemical evolution of deep Earth and planetary interiors. Given two initially separate assemblages (lithologies) in chemical equilibrium can we predict the chemical and mineralogical compositions of the two assemblages when they are put together to form a new equilibrated system? Perhaps a common perception is that given sufficient time, the two assemblages will homogenize chemically and mineralogically, however from a chemical thermodynamic point of view, this is not the case. Certain petrological differences in terms of bulk composition, mineralogy and mineral abundance rem…
Parliamentary Time as a Medium of Politics
2018
The chapter deals with parliamentary time that underlies all the other aspects as a temporal ‘subtext’ of parliamentary politics. The temporal aspect is built into the parliamentary procedures, debates, regimes and actors. It is not only a play in time but also a play with time. The parliamentary debate requires sufficient time but at the same time recognising that parliamentary time is always scarce, and a fair distribution of it between both items and members is necessary. Parliamentary politics shows therefore an extraordinary sensitivity for time. Parliamentary time is based on multiple rounds of debate as well as on a time order of parliamentary moves of different types. When used in p…
Aging and longevity: An evolutionary approach
2021
Abstract In the chapter, first of all, the definition of aging, longevity, and the various types of aging are discussed. Then, analyzing various theories of aging, it is recalled how evolution teaches us that there should be no genes selected to promote aging. Aging is not planned but derives from the accumulation of physical damage, due to limited investments in maintenance and repair as well as from the epigenetic changes. After sufficient time has passed, the increasing levels of these defects interfere with the performance of tissues and organs, resulting in a breakdown of self-organizing system and a reduced ability to adapt to the environment.