2,092 research outputs found
Biological remodelling: Stationary energy, configurational change, internal variables and dissipation
Remodelling is defined as an evolution of microstructure or variations in the
configuration of the underlying manifold. The manner in which a biological
tissue and its subsystems remodel their structure is treated in a continuum
mechanical setting. While some examples of remodelling are conveniently
modelled as evolution of the reference configuration (Case I), others are more
suited to an internal variable description (Case II). In this paper we explore
the applicability of stationary energy states to remodelled systems. A
variational treatment is introduced by assuming that stationary energy states
are attained by changes in microstructure via one of the two mechanisms--Cases
I and II. An example is presented to illustrate each case. The example
illustrating Case II is further studied in the context of the thermodynamic
dissipation inequality.Comment: 24 pages, 4 figures. Replaced version has corrections to typos in
equations, and the corresponding correct plot of the solution--all in Section
Sensory stability and aromatic differentiation of tropical Brazilian wines.
Our objective was determined stability of sensory parameters and aromatic differentiation of tropical wines from Northeast of Brazil by Quantitative Descriptive Analysis (QDA
Sensory stability and aromatic differentiation of tropical Brazilian wines.
Our objective was determined stability of sensory parameters and aromatic differentiation of tropical wines from Northeast of Brazil by Quantitative Descriptive Analysis (QDA
Fano resonances in plasmonic core-shell particles and the Purcell effect
Despite a long history, light scattering by particles with size comparable
with the light wavelength still unveils surprising optical phenomena, and many
of them are related to the Fano effect. Originally described in the context of
atomic physics, the Fano resonance in light scattering arises from the
interference between a narrow subradiant mode and a spectrally broad radiation
line. Here, we present an overview of Fano resonances in coated spherical
scatterers within the framework of the Lorenz-Mie theory. We briefly introduce
the concept of conventional and unconventional Fano resonances in light
scattering. These resonances are associated with the interference between
electromagnetic modes excited in the particle with different or the same
multipole moment, respectively. In addition, we investigate the modification of
the spontaneous-emission rate of an optical emitter at the presence of a
plasmonic nanoshell. This modification of decay rate due to electromagnetic
environment is referred to as the Purcell effect. We analytically show that the
Purcell factor related to a dipole emitter oriented orthogonal or tangential to
the spherical surface can exhibit Fano or Lorentzian line shapes in the near
field, respectively.Comment: 28 pages, 10 figures; invited book chapter to appear in "Fano
Resonances in Optics and Microwaves: Physics and Application", Springer
Series in Optical Sciences (2018), edited by E. O. Kamenetskii, A. Sadreev,
and A. Miroshnichenk
Desenvolvimento de catalisadores magnéticos para despoluição de águas contaminadas com pesticidas.
Disentangling natural and anthropogenic drivers of native and non‐native plant diversity on North Sea islands
physicochemical properties in the crystalline bulk and in thin films deposited from the gas phase
Four analogues of the spin-crossover complex [Fe(H2Bpz2)2(phen)] (H2Bpz2 =
dihydrobis(pyrazolyl)borate; 2) containing functionalized 1,10-phenanthroline
(phen) ligands have been prepared; i.e., [Fe(H2Bpz2)2(L)], L =
4-methyl-1,10-phenanthroline (3), 5-chloro-1,10-phenanthroline (4),
4,7-dichloro-1,10-phenanthroline (5), and 4,7-dimethyl-1,10-phenanthroline
(6). The systems are investigated by magnetic susceptibility measurements and
a range of spectroscopies in the solid state and in thin films obtained by
physical vapour deposition (PVD). Thermal as well as light-induced SCO
behaviour is observed for 3–6 in the films. By contrast, thermal SCO in the
solid state occurs only for 3 and 4 but is absent for 5 and 6. These findings
are discussed in the light of cooperative and intermolecular interactions
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