Application of Minimal Subtraction Renormalization to Crossover Behavior near the 3^3He Liquid-Vapor Critical Point

Parametric expressions are used to calculate the isothermal susceptibility, specific heat, order parameter, and correlation length along the critical isochore and coexistence curve from the asymptotic region to crossover region. These expressions are based on the minimal-subtraction renormalization scheme within the $\phi^4$ model. Using two adjustable parameters in these expressions, we fit the theory globally to recently obtained experimental measurements of isothermal susceptibility and specific heat along the critical isochore and coexistence curve, and early measurements of coexistence curve and light scattering intensity along the critical isochore of $^3$He near its liquid-vapor critical point. The theory provides good agreement with these experimental measurements within the reduced temperature range $|t| \le 2\times 10^{-2}$

Phase Separation in Lix_xFePO4_4 Induced by Correlation Effects

We report on a significant failure of LDA and GGA to reproduce the phase stability and thermodynamics of mixed-valence Li$_x$FePO$_4$ compounds. Experimentally, Li$_x$FePO$_4$ compositions ($0 \leq x \leq 1$) are known to be unstable and phase separate into Li FePO$_4$ and FePO$_4$. However, first-principles calculations with LDA/GGA yield energetically favorable intermediate compounds an d hence no phase separation. This qualitative failure of LDA/GGA seems to have its origin in the LDA/GGA self-interaction which de localizes charge over the mixed-valence Fe ions, and is corrected by explicitly considering correlation effects in this material. This is demonstrated with LDA+U calculations which correctly predict phase separation in Li$_x$FePO$_4$ for $U-J \gtrsim 3.5$eV. T he origin of the destabilization of intermediate compounds is identified as electron localization and charge ordering at different iron sites. Introduction of correlation also yields more accurate electrochemical reaction energies between FePO$_4$/Li$_x$FePO$_ 4$ and Li/Li$^+$ electrodes.Comment: 12 pages, 5 figures, Phys. Rev. B 201101R, 200

Important professional qualities of patient safety specialists

The study of individual characteristics of the patient safety culture was conducted in various Ukrainian health care facilities using the questionnaire of the Agency for Healthcare Research and Quality's (AHRQ). The characteristics of the patient safety culture were analyzed by taking into account the length of service, membership of respondent to medical or nursing staff, and the profile of therapeutic or surgical activity. The essential professional qualities of patient safety specialists and the categories of persons who are the most suitable candidates for the training of patient safety specialists were defined. It was noted that training specialists to ensure patients safety, taking into account professionally essential qualities, becomes especially relevant in connection with the transition from the culture of blaming individuals for mistakes to the practice of a fair culture, in which mistakes are not considered as a personal oversight, but as an opportunity to improve the system and prevent future harm. It was found that the nursing staff rated patient safety on wards lower than in hospital. A greater risk of adverse event reporting was found for surgical workers and a reduced risk of adverse event reporting for workers with 21 years of experience or more compared to workers with five years of experience or less. Based on the conducted research, it was concluded that the most suitable candidates for training patient safety specialists would be surgeons with 5 years of experience, who are critical as for patient safety in their units and prone to disclose adverse events

Important professional qualities of patient safety specialists

The study of individual characteristics of the patient safety culture was conducted in various Ukrainian health care facilities using the questionnaire of the Agency for Healthcare Research and Quality's (AHRQ). The characteristics of the patient safety culture were analyzed by taking into account the length of service, membership of respondent to medical or nursing staff, and the profile of therapeutic or surgical activity. The essential professional qualities of patient safety specialists and the categories of persons who are the most suitable candidates for the training of patient safety specialists were defined. It was noted that training specialists to ensure patients safety, taking into account professionally essential qualities, becomes especially relevant in connection with the transition from the culture of blaming individuals for mistakes to the practice of a fair culture, in which mistakes are not considered as a personal oversight, but as an opportunity to improve the system and prevent future harm. It was found that the nursing staff rated patient safety on wards lower than in hospital. A greater risk of adverse event reporting was found for surgical workers and a reduced risk of adverse event reporting for workers with 21 years of experience or more compared to workers with five years of experience or less. Based on the conducted research, it was concluded that the most suitable candidates for training patient safety specialists would be surgeons with 5 years of experience, who are critical as for patient safety in their units and prone to disclose adverse events

Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at √s=0.9 and 2.36 TeV

Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at root s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0.46 +/- 0.01 (stat.) +/- 0.01 (syst.) GeV/c at 0.9 TeV and 0.50 +/- 0.01 (stat.) +/- 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2.4 and +2.4. At these energies, the measured pseudorapidity densities in the central region, dN(ch)/d eta vertical bar(vertical bar eta vertical bar and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date

Extended Hubbard model with the renormalized Wannier wave functions in the correlated state II: quantum critical scaling of the wave function near the Mott-Hubbard transition

We present a model example of a quantum critical behavior of the renormalized single-particle Wannier function composed of Slater s-orbitals and represented in an adjustable Gaussian STO-7G basis, which is calculated for cubic lattices in the Gutzwiller correlated state near the metal-insulator transition (MIT). The discussion is carried out within the extended Hubbard model and using the method of approach proposed earlier [Eur. Phys. J. B 66, 385 (2008)]. The component atomic-wave-function size, the Wannier function maximum, as well as the system energy, all scale with the increasing lattice parameter R as [ (R-R c)/R c] s with s in the interval [0.9, 1.0]. Such scaling law is interpreted as the evidence of a dominant role of the interparticle Coulomb repulsion, which for R > R c is of intersite character. Relation of the insulator-metal transition critical value of the lattice-parameter R=R c to the original Mott criterion is also obtained. The method feasibility is tested by comparing our results with the exact approach for the Hubbard chain, for which the Mott-Hubbard transition is absent. In view of unique features of our results, an extensive discussion in qualitative terms is also provided. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010