Characterising differences between self-reported and wastewater-identified drug use at two consecutive years of an Australian music festival.

Background: In the context of drug prohibition, potential adulteration and variable purity pose additional health risks for people who use drugs, with these risks often compounded by the outdoor music festival environment. Ahead of the imminent implementation of drug checking services in Queensland, Australia, this study aims to characterise this problem using triangulated survey and wastewater data to understand self-reported and detected drug use among attendees of a multi-day Queensland-based music festival in 2021 and 2022.

Methods: We administered an in-situ survey focusing on drug use at the festival to two convenience samples of 136 and 140 festival attendees in 2021 and 2022 respectively.

Isolated celiac artery avulsion from blunt abdominal trauma.

Trauma-related celiac artery injuries are a rare and life-threatening pathology that often requires urgent multidisciplinary care. Rarer still are cases of celiac artery avulsion in the setting of blunt trauma. There is little literature describing such injury patterns.

Theoretical Prediction of the Sublimation Behavior by Combining Ab Initio Calculations with Statistical Mechanics.

We develop a theoretical model to predict the sublimation vapor pressure of pure substances. Moreover, we present a simple monoatomic molecule approximation, which reduces the complexity of the vapor pressure expression for polyatomic gaseous molecules at a convincing level of accuracy, with deviations of the Arrhenius prefactor for NaCl and NaF being 5.02% and 7.

Injecting drug use opportunities and reasons for choosing not to inject: A population-based study of Australian young adults who use stimulants.

Introduction: Understanding reasons for choosing not to inject drugs, among those who have never injected before, may be helpful for reducing transitions to injecting drug use. This study examines opportunities to inject and reasons for never injecting in young adults who used stimulants.

Methods: Data are from a population-based study of young adults who used ecstasy and methamphetamine (n = 313), recruited in Queensland, Australia in 2008/2009.

Gravitational waves from disks around spinning black holes: Simulations in full general relativity.

We present fully general-relativistic numerical evolutions of self-gravitating tori around spinning black holes with dimensionless spin / = 0.7 parallel or antiparallel to the disk angular momentum. The initial disks are unstable to the hydrodynamic Papaloizou-Pringle instability which causes them to grow persistent orbiting matter clumps.