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
A. Gordon
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
G. S. Smith, C. Toprakcioglu, S. M. Baker, J. B. Field, L. Dai, G. Hadziioannou, W. Hamilton, S. Wages
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...... hiện toàn bộ
Acoustic measurements of possible polaron relaxations in YBCO
Il Nuovo Cimento D - - 1997
G. Cannelli, R. Cantelli, F. Trequattrini, F. Cordero
Ultrarelativistic excitation of beat waves in a hot magnetized plasma
Il Nuovo Cimento D - Tập 13 - Trang 779-786 - 1991
M. Salimullah, M. B. Chaudhry, S. M. Khurshed Alam, M. H. A. Hassan
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...... hiện toàn bộ
Phase transitions in polymesomorphic compounds
Il Nuovo Cimento D - Tập 7 - Trang 421-436 - 1986
R. Caciuffo, S. Melone, G. Torquati, V. G. K. M. Pisipati, N. V. S. Rao
The results of a X-ray diffraction study, performed on N(p-n-pentyloxy benzylidene)p′-n-octylaniline (50.8) and N(p-n-pentyloxy benzylidene)p′-n-decylaniline (50.10) are presented. The investigated compounds exhibit smecticB, smecticA and nematic phases in between solid and isotropic liquid phases. In addition, after a thermal cycle the 50.8 compound exhibits a smecticG phase at room temperature. ...... hiện toàn bộ
Absorptive optical bistability at microwave frequencies
Il Nuovo Cimento D - Tập 1 - Trang 489-502 - 1982
A. Gozzini, F. Maccarrone, I. Longo
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
F. Aramu, V. Maxia, A. Delunas
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
A. Andreone, A. Cassinese, A. Di Chiara, R. Vaglio
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...... hiện toàn bộ
Light-emitting nanocrystalline silicon by low-pressure chemical-vapor deposition of disilane
Il Nuovo Cimento D - Tập 18 - Trang 1159-1165 - 1996
C. Manfredotti, F. Fizzotti, G. Amato
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...... hiện toàn bộ
Studies of auditory evoked magnetic and electric responses: Modality specificity and modelling
Il Nuovo Cimento D - Tập 2 - Trang 471-483 - 1983
T. Tuomisto, R. Hari, T. Katila, T. Poutanen, T. Varpula
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!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrVeFv0de9GqpGe9...... hiện toàn bộ
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