Search results for "Fermi"

Pain management in ERAS approach for abdominal surgery: A narrative review

2020

Tra tutte le fasi dell’intervento chirurgico, la fase preoperatoria è generalmente vissuta dal paziente con maggiore ansia. Studi in merito dimostrano che una maggiore percezione dell’ansia o paura nella fase preoperatoria sia scientificamente correlata a un decorso postoperatorio prolungato. Il dolore è annoverato tra le principali cause che recano ansia al paziente. L’obiettivo della presente revisione della letteratura è quello di esaminare la letteratura in merito alla gestione del dolore preoperatorio nei pazienti candidati alla chirurgia addominale, confrontando gli outcome clinici dei pazienti sottoposti a metodologia ERAS® con quelli ottenuti con una gestione perioperatoria tradizio…

Atoms embedded in an electron gas: Phase shifts and cross sections

1983

The Fermi-level scattering phase shifts and the transport cross sections are reported for atoms embedded in a homogeneous electron gas. The applications of the results are discussed, using the electronic stopping power for slow ions and impurity resistivity as examples. Peer reviewed

Atoms embedded in an electron gas: Immersion energies

1981

Energies of atoms, H through Ar, embedded in a homogeneous electron gas are calculated within the density-functional scheme as a function of the electron-gas density. The energy-versus-density curves and the induced densities of states are analyzed and discussed in terms of the interaction properties of an atom with its environment. The low-density limit of the immersion energy is related to the electron-atom scattering length. The results should prove useful in detailed investigations of the recently suggested "quasiatom" or "effective-medium" approaches to chemical binding. The lowest-order estimates of the binding energies of diatomic molecules and chemisorbed atoms are obtained. Peer re…

Dynamics of boson stars and fermion-boson stars: a numerical-relativity panorama

2022

Los albores de la astronomía de ondas gravitacionales, actualmente liderada por la Colaboración LIGO-Virgo-KAGRA, abren un nuevo canal para inspeccionar la verdadera naturaleza de los objetos compactos oscuros. Los miembros más convincentes de esta categoría son los agujeros negros, de los que se cree ampliamente que están bien descritos por la métrica de Kerr cerca del equilibrio. Se han propuesto varias posibilidades teóricas más exóticas, denominadas imitadores de agujeros negros, ya que sus propiedades y dinámica se parecen en ciertos aspectos a las de los agujeros negros. Entre esos objetos compactos oscuros alternativos, las estrellas bosónicas, descritas por un campo escalar o vector…

Spin-dependent WIMP-nucleus scattering off 125Te, 129Xe, and 131Xe in the microscopic interacting boson-fermion model

2019

We perform calculations of structure functions for elastic and inelastic spin-dependent scattering of weakly interacting massive particles (WIMPs) off 125Te, 129Xe, and 131Xe. The nuclear structure calculations are performed in the microscopic interacting boson-fermion model (IBFM-2). In our calculations we employ one-body and leading long-range two-body WIMP-nucleus currents derived from chiral effective field theory. We demonstrate that the relevant matrix elements can be reliably computed in the IBFM-2, which will allow investigation of heavy deformed nuclei previously inaccessible to theoretical calculations. peerReviewed

Current and/ or life time use of cannabis as a factor of vulnerability in psychotic disorders

2014

Distraction as a technique to control pain in pediatric patients during venipuncture. A narrative review of literature

2015

Introduzione: La distrazione è un intervento non farmacologico in grado di ridurre l’intensità del dolore procedurale nei bambini. Tra le procedure maggiormente diffuse, la venipuntura è una di quelle maggiormente applicate in area pediatrica, per scopi diagnostici e terapeutici. L’analgesia durante la venipuntura può essere efficacemente raggiunta con tecniche di distrazione. Obiettivo: descrivere l’efficacia delle tecniche di distrazione attiva e passiva per la riduzione del dolore, nei bambini sottoposti a venipuntura. Metodi: è stata realizzata una revisione della letteratura consultando i database CINHAL, PubMed, ILISI e Cochrane. Sono stati inclusi tutti studi primari e secondari pubb…

Accuracy of risk tools to predict critical bleeding in major trauma: A systematic review with meta-analysis.

2021

BACKGROUND Early detection of critical bleeding by accurate tools can help ensure rapid delivery of blood products to improve outcomes in major trauma patients. We conducted a systematic review to evaluate the accuracy of risk tools to predict critical bleeding in patients with major trauma. METHODS PubMed, Embase, and CENTRAL were searched up to February 2021 for studies investigating risk tools to predict critical bleeding for major trauma people in prehospital and emergency department. We followed the Preferred Reporting Items for Systematic Review and Meta-Analysis of Diagnostic Test Accuracy study guidelines. Two independent authors included studies, extracted data, appraised the quali…

Effective charge from lattice QCD

2020

Using lattice configurations for quantum chromodynamics (QCD) generated with three domain-wall fermions at a physical pion mass, we obtain a parameter-free prediction of QCD's renormalisation-group-invariant process-independent effective charge, $\hat\alpha(k^2)$. Owing to the dynamical breaking of scale invariance, evident in the emergence of a gluon mass-scale, this coupling saturates at infrared momenta: $\hat\alpha(0)/\pi=0.97(4)$. Amongst other things: $\hat\alpha(k^2)$ is almost identical to the process-dependent (PD) effective charge defined via the Bjorken sum rule; and also that PD charge which, employed in the one-loop evolution equations, delivers agreement between pion parton di…

Face mask use in the Community for Reducing the Spread of COVID-19: a systematic review

2021

ABSTRACTBackgroundEvidence is needed on the effectiveness of wearing face masks in the community to prevent SARS-CoV-2 transmission.MethodsSystematic review and meta-analysis to investigate the efficacy and effectiveness of face mask use in a community setting and to predict the effectiveness of wearing a mask. We searched MEDLINE, EMBASE, SCISEARCH, The Cochrane Library and pre-prints from inception to 22 April 2020 without restriction by language. We rated the certainty of evidence according to Cochrane and GRADE approach.FindingsOur search identified 35 studies, including 3 randomised controlled trials (RCTs) (4017 patients), 10 comparative studies (18984 patients), 13 predictive models,…