Evaluation of hospital-onset bacteraemia and fungaemia in the USA as a potential healthcare quality measure: a cross-sectional study.

Background: Hospital-onset bacteraemia and fungaemia (HOB) is being explored as a surveillance and quality metric. The objectives of the current study were to determine sources and preventability of HOB in hospitalised patients in the USA and to identify factors associated with perceived preventability.

Methods: We conducted a cross-sectional study of HOB events at 10 academic and three community hospitals using structured chart review.

Observation of Nagaoka polarons in a Fermi-Hubbard quantum simulator.

Quantum interference can deeply alter the nature of many-body phases of matter. In the case of the Hubbard model, Nagaoka proved that introducing a single itinerant charge can transform a paramagnetic insulator into a ferromagnet through path interference. However, a microscopic observation of this kinetic magnetism induced by individually imaged dopants has been so far elusive.

Frustration- and doping-induced magnetism in a Fermi-Hubbard simulator.

Geometrical frustration in strongly correlated systems can give rise to a plethora of novel ordered states and intriguing magnetic phases, such as quantum spin liquids. Promising candidate materials for such phases can be described by the Hubbard model on an anisotropic triangular lattice, a paradigmatic model capturing the interplay between strong correlations and magnetic frustration. However, the fate of frustrated magnetism in the presence of itinerant dopants remains unclear, as well as its connection to the doped phases of the square Hubbard model.

Psychosocial impact of the COVID-19 pandemic on cancer patients, survivors and caregivers.

This study aimed to increase understanding of the effects of the pandemic on cancer patients, survivors and caregivers. An Internet-based survey was accessed over 2 months by individuals diagnosed with cancer or caregivers (N = 281), with descriptive statistics and chi square analysis used to compare subsets. Most participants reported social isolation (76%) and mental health impact (70%) since the beginning of the COVID19 pandemic; isolation appeared to correlate with mental health impact (p < .