17,768 research outputs found
How to add a boundary condition
Given a conformal QFT local net of von Neumann algebras B_2 on the
two-dimensional Minkowski spacetime with irreducible subnet A\otimes\A, where A
is a completely rational net on the left/right light-ray, we show how to
consistently add a boundary to B_2: we provide a procedure to construct a
Boundary CFT net B of von Neumann algebras on the half-plane x>0, associated
with A, and locally isomorphic to B_2. All such locally isomorphic Boundary CFT
nets arise in this way. There are only finitely many locally isomorphic
Boundary CFT nets and we get them all together. In essence, we show how to
directly redefine the C* representation of the restriction of B_2 to the
half-plane by means of subfactors and local conformal nets of von Neumann
algebras on S^1.Comment: 20 page
Evidence of a pressure-induced metallization process in monoclinic VO
Raman and combined trasmission and reflectivity mid infrared measurements
have been carried out on monoclinic VO at room temperature over the 0-19
GPa and 0-14 GPa pressure ranges, respectively. The pressure dependence
obtained for both lattice dynamics and optical gap shows a remarkable stability
of the system up to P*10 GPa. Evidence of subtle modifications of V ion
arrangements within the monoclinic lattice together with the onset of a
metallization process via band gap filling are observed for PP*. Differently
from ambient pressure, where the VO metal phase is found only in
conjunction with the rutile structure above 340 K, a new room temperature
metallic phase coupled to a monoclinic structure appears accessible in the high
pressure regime, thus opening to new important queries on the physics of
VO.Comment: 5 pages, 3 figure
CoQ10 and vitamin A supplementation support voice rehabilitation. A double-blind, randomized, controlled, three-period cross-over pilot study
Objectives: To evaluate the effectiveness of an adjuvant therapy (CoQ10 in its watersoluble form and vitamin A) in supporting voice rehabilitation in a large group of patients with muscle tension dysphonia (MTD). Study Design: Twelve-week, double-blind, randomized, controlled, three-period crossover pilot study. The primary endpoint was the change in the Dysphonia Severity Index (DSI) over the 12-week study period. Secondary endpoints were the changes in the subcomponents of DSI, including MPT, F0-high, I-low, and jitter. Exploratory endpoints were the changes in the Shimmer and in Voice Handicap Index (VHI). Methods: Patients were randomly assigned in a 1:1 ratio to two counter-balanced arms. Group A (ADJ-PLA) patients were administered QTer 300 mg and Vit A acetate 500.000 Ul/g 1 mg twice daily for a 4-week intervention period, followed by a 4-week period of wash-out, and then were submitted to a last 4-week period of placebo. Patients in Group B (PLB-ADJ) were given the treatment period in reverse order. Both groups received a 45-min voice therapy in a group format once a day for 4 weeks during the first and the second active periods. The therapy was held during the wash-out period. Results: The analysis of main time effect indicated a trend toward recovery of vocal function regardless of group assignment. A significant time by group effect was found on DSI [F = 3.4 (2.5, 80.5), p = 0.03], F0-high [F = 4.5 (2.6, 82.9), p = 0.008] and Shimmer [F = 3.6 (1.5, 46.9), p = 0.048], under CoQ10 and Vit A treatment, with a small effect size. There was no significant time by group effect on the other study measures, namely MPT, I-low, VHI. Conclusions: A trend toward recovery of vocal function was observed in all the patients, likely due to voice rehabilitation. The improvement of DSI was greater under CoQ10 and Vitamin treatment, indicating a more pronounced improvement of vocal quality under adjuvant therapy. The study protocol was reviewed and approved by the Ethics Committee of Policlinico Umberto I Hospital, Rome, Italy Rif. 3069/13.02.2014
1976 Water Quality Hillsborough County, Florida
The Hillsborough County Environmental Protection Ac t charges the Environmental Prote ction Commission with the function of establishing, operating and maintaining a continuous program for monitoring water pollution. A county-wide water quality surveillance network has been designed to provide accurate data and information as t o whether the requirements of the Act are being complied with and whether the level of water pollution is increasing or decreasing throughout the county.
This broad base of water data obtained during 1972-1976 provides useful background data for eventual development, revision and enforcement of regulations, standard effluent limitation plans, or programs established under the Federal Water Pollution Control Act of 1972
Exploiting the close-to-dirac point shift of the Fermi level in the Sb2Te3/Bi2Te3 topological insulator heterostructure for spin-charge conversion
Exploiting the close-to-Dirac point shift of Fermi level in Sb2Te3/Bi2Te3 topological insulator heterostructure for spin-charge conversion
Properly tuning the Fermi level position in topological insulators is of
vital importance to tailor their spin-polarized electronic transport and to
improve the efficiency of any functional device based on them. Here we report
the full in situ Metal Organic Chemical Vapor Deposition (MOCVD) and study of a
highly crystalline Bi2Te3/Sb2Te3 topological insulator heterostructure on top
of large area (4'') Si(111) substrates. The bottom Sb2Te3 layer serves as an
ideal seed layer for the growth of highly crystalline Bi2Te3 on top, also
inducing a remarkable shift of the Fermi level to place it very close to the
Dirac point, as visualized by angle-resolved photoemission spectroscopy. In
order to exploit such ideal topologically-protected surface states, we
fabricate the simple spin-charge converter Si(111)/Sb2Te3/Bi2Te3/Au/Co/Au and
spin-charge conversion (SCC) is probed by spin pumping ferromagnetic resonance.
A large SCC is measured at room temperature, which is interpreted within the
inverse Edelstein effect (IEE), thus resulting in a conversion efficiency
lambda_IEE of 0.44 nm. Our results demonstrate the successful tuning of the
surface Fermi level of Bi2Te3 when grown on top of Sb2Te3 with a full in situ
MOCVD process, which is highly interesting in view of its future technology
transfer.Comment: Main text: 19 pages, 6 figures. Supplementary information are also
included in the file with additional 4 page
Keeping Order While Moving Fast: Ergosterol Pairs Lead to Dynamic Networks in Lipid Membranes
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