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Ideas of four-fermion operators in hadron physics
(2013-04-22)
Four-fermion operators have been utilized in the past to link the quarkexchange processes in the interaction of hadrons with the effective mesonexchange amplitudes. In this paper, we apply the similar idea of Fierz ...
Ideas of four-fermion operators in hadron physics
(2013-04-22)
Four-fermion operators have been utilized in the past to link the quarkexchange processes in the interaction of hadrons with the effective mesonexchange amplitudes. In this paper, we apply the similar idea of Fierz ...
A correlation‐energy functional from a correlation‐factor model
(1994)
In this work, a way to approximate the correlation energy functional starting from a model correlation factor is shown. The problem is addressed by using formally exact properties of the second‐order density matrix and ...
¿Qué hace físicamente posible a un mundo posible?What makes a possible world physycally possible?
(Universidade Federal de Santa Catarina, 2020-04-28)
There is a widely extended viewpoint about physical possibility, what we will call Standard Approach, which holds that the physically possible is delimited by the nomological structure of physical theories: to be physically ...
Factors associated with physical-activity performance by older individuals in a medium-sized city in São Paulo State, Brazil
(2013)
Physical activity has been scientifically discussed as fundamental in the process of healthy ageing. Hence, this study aimed at determining the factors that influence older people to perform physical activities. The complete ...
Physical exercise modulates peripheral levels of brain-derived neurotrophic factor (BDNF): A systematic review of experimental studies in the elderly
(2013-01-01)
The objective of this study was to conduct a systematic review of studies that analyzed the effect of physical exercise on the peripheral levels of BDNF in elderly individuals. Method: We conducted a search in PsycINFO, ...