Il Nuovo Cimento D
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On soliton mechanism for diffusion of ionic defects in hydrogen-bonded solids
Il Nuovo Cimento D - Tập 12 - Trang 229-232 - 1990
It is shown that the solitonic mechanism may be responsible for the diffusion of
ionic defects in some hydrogen-bonded solids. A good agreement with experiments
is obtained for H3O+ in ice crystals.
Neutron reflectivity study of adsorbed diblock copolymers
Il Nuovo Cimento D - Tập 16 - Trang 721-726 - 1994
In this paper, we summarize our cumulative work on neutron reflectivity studies
of polystyrene-poly(vinyl-2-pyridine) (PS-PVP) and polystyrene-polyethylene
oxide (PS-PEO) adsorbed at a quartz-solvent interface. Deuterated toluene was
chosen as the solvent since it is a good solvent for PS and a poor one for
either of the other two blocks. In this case, the polystyrene dangles into the
solvent whil...
Ultrarelativistic excitation of beat waves in a hot magnetized plasma
Il Nuovo Cimento D - Tập 13 - Trang 779-786 - 1991
A theoretical investigation is made on the nonlinear relativistic excitation of
an electrostatic electron plasma wave at the beat frequency of two high-power
colinear laser beams in a hot, homogeneous and magnetized plasma. The
relativistic Vlasov equation expressed in gyrokinetic variables has been
employed to find the nonlinear response of the magnetized plasma electrons. It
is noted that the po...
Absorptive optical bistability at microwave frequencies
Il Nuovo Cimento D - Tập 1 - Trang 489-502 - 1982
Intrinsic absorptive bistability and hysteresis cycles in a steady-state regime
are obtained at microwave frequencies. A theory is presented which takes into
account the Gaussian shape of the fundamental mode excited into the resonator
and is compared with the experimental results.
Mössbauer spectroscopy of talc minerals
Il Nuovo Cimento D - - 1989
By Mössbauer spectroscopy we investigated some talc, chloritoschist and
micaschist samples drawn from the biggest Paleozoic talc deposit in Sardinia,
Italy. Compared to results of previous chemical analyses some discrepancies
exist. Data show the high degree of chloritization of neighbouring micaschist.
This material exhibits the presence of primary ilmenite.
Fabrication and test of a YBa2Cu3O7-δ three-pole band pass filter
Il Nuovo Cimento D - Tập 19 - Trang 1369-1373 - 1997
We designed and fabricated a Tchebysheff three-pole bandpass microstrip filter
with a center frequency off= 9.5 GHz and bandwidth at —3 dB of 0.8%. The device
has been made with high-quality YBa2Cu307-δ (YBCO) films deposited on LaA103
substrates by an inverted cylindrical magnetron sputtering technique. The
microwave behavior of the YBCO films has been studied using a microstrip
resonator techniq...
Light-emitting nanocrystalline silicon by low-pressure chemical-vapor deposition of disilane
Il Nuovo Cimento D - Tập 18 - Trang 1159-1165 - 1996
Porous silicon is an attractive material for silicon optoelectronics. The great
advantage of porous silicon lies on the simple way of production which makes
silicon nanostructures easily available. After several papers have been
published on this topic, we are able to identify some disadvantages connected to
the porous nature of the material and to the method of fabrication. Other dry
processes ca...
Studies of auditory evoked magnetic and electric responses: Modality specificity and modelling
Il Nuovo Cimento D - Tập 2 - Trang 471-483 - 1983
The sources of auditory evoked electric and magnetic responses were modelled
with multiple current dipoles. The activity at the auditory cortices, 2.6 cm
beneath the skull, explains the observed % MathType!MTEF!2!1!+-%
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NMR of water in biological systems
Il Nuovo Cimento D - Tập 2 - Trang 1019-1032 - 1983
A simple relationship has been thought to exist between the dynamics of water in
heterogeneous (liquid-solid) systems and the NMR response. This relationship is
usually expressed by the Bloembergen-Purcell-Pound (BPP) equations for
relaxation and the phase model. However, a requirement for the use of the BPP
theory is that motions take place in an isotropic, infinite and
three-dimensional space. I...
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