Publications by authors named "J K Whitfield"

The Jordan-Wigner transformation permits one to convert spin 1/2 operators into spinless fermion ones, or vice versa. In some cases, it transforms an interacting spin Hamiltonian into a noninteracting fermionic one, which is exactly solved at the mean-field level. Even when the resulting fermionic Hamiltonian is interacting, its mean-field solution can provide surprisingly accurate energies and correlation functions.

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  • The south coast of the UK has diverse habitats that support ground-nesting aculeate wasps and bees, primarily in sandy areas.
  • A unique transition zone between Hard Cliff and Maritime Heath at Carn Du, Cornwall, showed a high diversity of over twenty species of these insects.
  • The study, conducted in summer 2024, details the nesting species found and includes field photographs for illustration.
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  • The Olympic Games showcase the top athletes, whose extraordinary abilities in speed, strength, and endurance are often overlooked by casual fans.
  • Endurance running, especially the marathon, allows for a unique comparison between elite and recreational runners, highlighting their vastly different experiences and physiological demands.
  • The review emphasizes the biological advantages of elite athletes and discusses inconsistencies in sports science communication regarding the differences between top competitors and well-trained recreational runners.
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Background: Persons experiencing homelessness (PEH) are vulnerable emergency department (ED) patients due to high rates of multi-comorbidity and mortality, as well as a lack of follow up care. Communication of test results pending at discharge (TPAD) is an important area of post-ED follow up care. We examined phone access, successful contact, and change in treatment among PEH and non-PEH with TPAD from the ED.

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Background: Emergency departments (EDs) are often patients' first point of contact with the health care system. Race, ethnicity, and language all influence factors leading up to ED visits and patient experiences within the ED. There is limited evidence showing how race, ethnicity, and language interact to shape ED experiences, particularly during the COVID-19 pandemic when EDs were extremely strained.

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