11 research outputs found
Magnetic transitions induced by pressure and magnetic field in a two-orbital -electron model in cubic and tetragonal lattices
We investigate the onset and evolution of under the simultaneous application
of pressure and magnetic field of distinct itinerant N\'eel states using the
underscreened Anderson Lattice Model (UALM) which has been proposed to describe
-electron systems. The model is composed by two narrow -bands (of either
or character) that hybridize with a wide -band and local
-electron interactions. We consider both cubic and tetragonal lattices. The
N\'eel order parameters and are assumed to be
fixed by an Ising anisotropy. The applied magnetic field is parallel to
the anisotropy axis. It has been assumed that the variation of the band width
is sensitive to pressure. In the absence of a magnetic field, the increase
of takes the system from the phase AF to another phase AF. The
phase AF occurs when while in the AF
phase the gaps satisfy . In the presence of a
magnetic field , the phase AF is quickly suppressed and reappears
again at intermediate values of the magnetic field while it is predominant at
higher magnetic fields. The analysis of the partial density of states close to
the phase transition between the phases AF and AF, allows a better
understanding the mechanism responsible whereby the transition is induced by an
increase in the magnetic field. As a important general result, we found that
the magnetic field favours the phase AF while the phase AF is
suppressed. For the tetragonal lattice, the phase AF is even more favored
when and increases concomitantly, where and are the lattice
parameters
The impact of preoperative patient characteristics on the cost-effectiveness of total hip replacement: a cohort study
Effects of Crack Density on Wettability and Mechanical Properties of Hard Chrome Coatings
Interplay Between Condensation Energy, Pseudogap, and the Specific Heat of a Hubbard Model in a n -Pole Approximation
The impact of preoperative patient characteristics on the cost-effectiveness of total hip replacement: A cohort study.
BACKGROUND: To facilitate the discussion on the increasing number of total hip replacements (THR) and their effectiveness, we apply a joint evaluation of hospital case costs and health outcomes at the patient level to enable comparative effectiveness research (CER) based on the preoperative health state. METHODS: In 2012, 292 patients from a German orthopedic hospital participated in health state evaluation before and 6 months after THR, where health-related quality of life (HRQoL) and disease specific pain and dysfunction were analyzed using EQ-5D and WOMAC scores. Costs were measured with a patient-based DRG costing scheme in a prospective observation of a cohort. Costs per quality-adjusted life year (QALY) were calculated based on the preoperative WOMAC score, as preoperative health states were found to be the best predictors of QALY gains in multivariate linear regressions. RESULTS: Mean inpatient costs of THR were 6,310 Euros for primary replacement and 7,730 Euros for inpatient lifetime costs including revisions. QALYs gained using the U.K. population preference-weighted index were 5.95. Lifetime costs per QALY were 1,300 Euros. CONCLUSIONS: The WOMAC score and the EQ-5D score before operation were the most important predictors of QALY gains. The poorer the WOMAC score or the EQ-5D score before operation, the higher the patient benefit. Costs per QALY were far below common thresholds in all preoperative utility score groups and with all underlying calculation methodologies
Hip and Knee Section, Treatment, Debridement and Retention of Implant: Proceedings of International Consensus on Orthopedic Infections
acute periprosthetic joint infectio