5,182 research outputs found
Experimental Study of Electrophoretic Deposited Carbon Nanotubes on Microstrip Transmission Line Resonators and Filters
The electrical properties of single-walled carbon nanotube electrophoreses deposition on different types of gold-plated microstrip devices are investigated. Simple transmission lines, transmission line resonators and filters were subjected to deposition of functionalized tubes in an aqueous solution. It is found that the process lowers the resonant frequency of the resonators and filters compared to the untreated devices, at the cost of increased insertion loss and reduced resonator Q-factor
Helicoidal Fields and Spin Polarized Currents in CNT-DNA Hybrids
We report on theoretical studies of electronic transport in the archetypical
molecular hybrid formed by DNA wrapped around single-walled carbon nanotubes
(CNTs). Using a Green's function formalism in a -orbital tight-binding
representation, we investigate the role that spin-orbit interactions play on
the CNT in the case of the helicoidal electric field induced by the polar
nature of the adsorbed DNA molecule. We find that spin polarization of the
current can take place in the absence of magnetic fields, depending strongly on
the direction of the wrapping and length of the helicoidal field. These
findings open new routes for using CNTs in spintronic devices.Comment: 4 pages, 5 figure
Training health professionals in patient-centered communication during magnetic resonance imaging to reduce patients’ perceived anxiety
Objective: We examined how a patient-centered communication training program for magnetic
resonance imaging (MRI) affected health professional (HP) practice and patients’ perceived anxiety (PA).
Methods: We implemented an intervention program. Six of the 17 eligible HPs completed the study. The
proportion of observed desired behaviors (PODBs), including MRI procedure explanation (MRI-PE),
communication, and MRI checking procedures was measured using an observation grid. We tested 182
patients (85 pre-, 58 post-, and 39 at follow-up) for PA pre- and post-MRI.
Results: The Bayesian ANOVA effect size suggested moderate evidence of improvement in HP PODBs, preto
post-intervention. Use of MRI-PE declined between post-intervention and follow-up (6 months later).
Observed changes in PA, pre- to post-MRI, could be related to time constraints and perceived pressure to
explain the exam in detail once institutional routines are reestablished.
Conclusion: In MRI units, time constraints condition the performance of HPs who address patients’ PA.
Practice implications: “Real workplace” interventions that promote better patient-centered communication
and provide each patient with a comprehensive explanation of MRI procedures also appear to
improve HP PODBs
Triple seesaw mechanism
On fitting the type II seesaw mechanism into the type I seesaw mechanism, we
obtain a formula to the neutrino masses which get suppressed by high-scale
in its denominator. As a result, light neutrinos are naturally obtained
with new physics at TeV scale. As interesting consequence, the mechanism may be
directly probed at the LHC by directly producing the TeV states intrinsic of
the mechanism. We show that the 3-3-1 model with right-handed neutrinos
realizes naturally such seesaw mechanism.Comment: About 13 pages, no figure
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