The electrophysiology of cardiac myocytes is tightly coupled to mechanics. One aspect of this is apparent in the effects of mechanical strain on cardiac action potential dynamics. These can be considered through adjustments to classic electrophysiological models. The standard FitzHugh Nagumo model is a reduced two-variable model from Hodgkin-Huxley that can reproduce basic mechanisms of action ...

BACKGROUND Impaired alveolar-capillary membrane conductance is the major cause for the reduction in pulmonary diffusing capacity for carbon monoxide (DLCO) in heart failure. Whether this reduction is fixed, reflecting pulmonary microvascular damage, or is variable is unknown. The aim of this study was to assess whether DLCO and its subdivisions, alveolar-capillary membrane conductance (DM) and ...

Energy and water exchange between the surface atmosphere are important drivers to Earth’s climate from local global scale. In this study, energy dynamic biophysical mechanisms that control partitioning over a natural grassland pasture Brazilian Pampa biome investigated using two micrometeorological sites located 300 km apart, in Southern Brazil. The latent heat flux, LE, was main component of b...

Disordered T-shaped graphene nanodevice (TGN) was designed and studied in this paper. We demonstrated the intrinsic transport properties of the TGN by using Landauer approach. Knowing the transmission probability of an electron the current through the system is obtained using Landauer-Buttiker formalism. The effects of single disorder on conductance, current and on the transport length scales a...

In the developing hippocampus, GABA exerts depolarizing and excitatory actions and contributes to the generation of neuronal network driven giant depolarizing potentials (GDPs). Here, we studied spike time coding at immature GABAergic synapses and its impact on synchronization of the neuronal network during GDPs in the neonatal (postnatal days P2-6) rat hippocampal slices. Using extracellular r...

Remote sensing capabilities to monitor evergreen broadleaved vegetation are limited by the low temporal variability in greenness signal. With canopy computed from digital repeat photography (PhenoCam), we investigated how related seasonal changes leaf age and traits as well variation of trees’ water fluxes (characterized sap flow conductance). The results showed that sprouting leaves mainly res...

The conductance of a waveguide containing finite number of periodically placed identical point-like impurities is investigated. It has been calculated as a function of both the impurity strength and the number of impurities using the Landauer-Büttiker formula. In the case of few impurities the conductance is proportional to the number of the open channels N of the empty waveguide and shows a re...