The UHRA is a repository of the research produced by the University of Hertfordshire. Research in UHRA can be viewed and downloaded freely by researchers and students all over the world.










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Developments in the Epidemiology of Drug-Related Mortality in the United Kingdom over the last 30 Years: Continuity, Change, Consistency, and Challenge
(2024-10-03)This thesis has its roots in and has organically grown out of the author’s previous professional civil service roles and academic and related activities associated with drug indicators since 1987. However, the focus of the ... -
Positive Geometries for Scattering Amplitudes in N = 4 SYM and ABJM
(2024-09-12)This thesis investigates geometric descriptions of scattering amplitudes, with a specific focus on scattering amplitudes in N = 4 SYM and ABJM theory. The recent development of the field of positive geometries provides ... -
A kiloparsec-scale ordered magnetic field in a galaxy at z = 5.6
(2024-12-31)Magnetic fields are widely observed in various astronomical contexts, yet much remains unknown about their significance across different systems and cosmic epochs. Our current knowledge of the evolution of magnetic fields ... -
Lorentzian bordisms in algebraic quantum field theory
(2025-02-03)It is shown that every algebraic quantum field theory has an underlying functorial field theory which is defined on a suitable globally hyperbolic Lorentzian bordism pseudo-category. This means that globally hyperbolic ... -
Pre-registration student research placements within knowbest: a service evaluation
(2025-03-30)Pre-registration student placements have traditionally been based in clinical settings. Recently, practice-based learning has evolved to include additional settings, including research, leadership and management. The ...