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To determine the incidence and characteristics of hospital-based gun violence from 2000–2019.
Methods
A keyword-based search of the Nexis Uni database was conducted to identify hospital based shootings ((“shooting” w/5 “healthcare”) OR (“shooting” w/5 “health care”) OR (“shooting” w/5 “hospital”) OR (“shooting” w/5 “emergency room”) OR (“shooting” w/5 “ER”). Hospital based shootings were defined as any firearms discharge that occurred on hospital grounds in which at least one person was injured. Specialty hospitals and other healthcare facilities were excluded. Demographic, motive, and outcome data from news articles were abstracted by 2 independent reviewers with discrepancies resolved by a third reviewer. Motives were categorized according to a previously published classification schema.
Results
We identified 146 hospital-based shootings. 88 shootings have occurred since 2010. 133 of the shooters were male (91%), with a median age of 46. 77 (53%) shooters were killed, 49 from suicide (34%). Shootings were most frequently motivated by social violence (n=32, 22%).
Conclusions
Hospital-based shootings are not a rare occurrence, with middle-aged male shooters as the most common perpetrators. These events appear to be increasing over time and evidence-based mitigation strategies should be investigated.
In mass casualty scenarios, patients with apparent hemodynamic and respiratory stability might have occult life-threatening injuries. These patients could benefit from more accurate triage methods. This study assessed the impact of point-of-care ultrasound (POCUS) on the accuracy of secondary triage conducted at an advanced medical post (AMP) to enhance the detection of patients who, despite their apparent clinically stable condition, could benefit from immediate life-saving interventions or priority earlier transport to definitive care.
Methods
A mass casualty simulated event consisting of a bomb blast in a remote area was conducted with 10 simulated casualties classified as YELLOW at the primary triage scene; patients were evaluated by 4 physicians at an AMP. Three patients had, respectively, hemoperitoneum, pneumothorax, and hemothorax. Two of the four physicians were provided the use of POCUS.
Results
All 4 physicians were able to suspect hemoperitoneum, but only physicians utilizing POCUS detected pneumothorax and hemothorax.
Conclusion
This study suggests that POCUS-enhanced secondary MCI triage at an AMP may represent an effective methodology to accurately detect nonapparent injuries that require time-dependent priority transport or life-saving interventions. Further studies with larger samples conducted in varied MCI scenarios are warranted.
Italy frequently experiences major events like earthquakes, floods and migrant shipwrecks. Global concerns include climate change, pandemics and wars. We would assess the role of public health experts and the current state of Italian post-degree Public Health schools towards these challenges.
Methods
A cross-sectional online survey was conducted in Italy in June 2023, among all Italian Public Health residents enrolled in SItI. The study investigated the presence of trainings and updates about emergencies. It also explored interest and importance of topic, impact of Covid-19 pandemic and sources of information.
Results
Out of 289 respondents, 86.2% deemed the topic important and 74.4% expressed interest (both p<0.001). 90.1% pointed out the lack of dedicated courses and 93.1% as for specialized master’s programs (both p<0.001). Perceived importance in the topic correlates with the desire to attend dedicated conferences (p<0.001). For COVID-19, 24.6% recognized the importance of topic pre-pandemic, while 50.9% raised awareness during (both p<0.001).
Conclusions
A discussion is needed for enhanced training programs in public health emergency prevention and management across Italy, pledging for uniformity within different training networks. In this way, a more robust response to future emergencies may be ensured.
The recent rise of active shootings calls for adequate preparation. Currently, the ‘Run, Hide, Fight’ concept is widely accepted and adopted by many hospitals nationwide. Unfortunately, the appropriateness of this concept in hospitals is uncertain due to lack of data. To understand the ‘Run, Hide, Fight’ concept application in hospital, a review of currently available data is needed.
Methods
A systematic review was done focusing on the ‘Run, Hide, Fight’ concept using multiple databases from the last 12 years. The PRISMA flow diagram was used to systematically select the articles based on specific inclusion and exclusion criteria. The measurements were subjective evaluations and survival probabilities post-concept.
Results
One agent-based modeling study suggested a high survival probability in non-medical settings. However, there is a paucity of data supporting its effectiveness and applicability in hospitals. Literature suggests a better suitable concept, the ‘Secure, Preserve, Fight’ concept, as a response protocol to active shootings in hospitals.
Conclusion
The effectiveness of the ‘Run, Hide, Fight’ concept in hospitals is questionable. The ‘Secure, Preserve, Fight’ concept was found to be designed more specifically for hospitals and closes the gaps on the flaws in the ‘Run, Hide, Fight’ concept.
We discuss the applicability of quasilinear-type approximations for a turbulent system with a large range of spatial and temporal scales. We consider a paradigm fluid system of rotating convection with vertical and horizontal temperature gradients. In particular, the interaction of rotation with the horizontal temperature gradient drives a ‘thermal wind’ shear flow whose strength is controlled by the horizontal temperature gradient. Varying this parameter therefore systematically alters the ordering of the shearing time scale, the convective time scale and the correlation time scale. We demonstrate that quasilinear-type approximations work well when the shearing time scale or the correlation time scale is sufficiently short. In all cases, the generalised quasilinear approximation systematically outperforms the quasilinear approximation. We discuss the consequences for statistical theories of turbulence interacting with mean gradients.
A mass casualty incident (MCI) is unpredictable and involves many casualties at the same time and place. This brief report will present the results from an evaluation a full-scale MCI exercise, aiming to increase preparedness for such events, from the perspectives of future health-care professionals, as well as personnel in various emergency teams taking part in MCI response.
Methods
All participants in a 2-day, full-scale MCI exercise (N = 206) were invited to participate in an investigator-developed survey.
Results
In total, 124 participants (60.2%) responded to the questionnaire. Most of the respondents were satisfied with the information and frames of the full-scale MCI exercise. Based on their experiences, over half of the respondents perceived that the county ambulance, police, and fire departments were well prepared in case of an MCI in the future. Reported areas of improvement were specifically related to communication lines and triage.
Conclusion
Weakness in communication lines and triage were assumed a threat to effective handling of MCIs. However, further studies are needed to decide the content needed in MCI exercises to effectively increase regional preparedness for such events.
This article is part of Religious Studies’ new initiative to publish a series of interviews with distinguished philosophers of religion. Each interview explores the personal and academic background of the interviewee and discusses their core philosophical views. The aim is to inspire students and scholars and to provide an overview of some of the most important works developed by contemporary philosophers of religion. In the first interview, Max Baker-Hytch interviews Richard Swinburne, covering such topics as his upbringing, his days as a student in Oxford in the 1950s, and his views on natural theology, the problem of evil, and the mind-body problem.
We study the autophoretic motion of a spherical active particle interacting chemically and hydrodynamically with its fluctuating environment in the limit of rapid diffusion and slow viscous flow. Then, the chemical and hydrodynamic fields can be expressed in terms of integrals. The resulting boundary-domain integral equations provide a direct way of obtaining the traction on the particle, requiring the solution of linear integral equations. An exact solution for the chemical and hydrodynamic problems is obtained for a particle in an unbounded domain. For motion near boundaries, we provide corrections to the unbounded solutions in terms of chemical and hydrodynamic Green's functions, preserving the dissipative nature of autophoresis in a viscous fluid for all physical configurations. Using this, we give the fully stochastic update equations for the Brownian trajectory of an autophoretic particle in a complex environment. First, we analyse the Brownian dynamics of particles capable of complex motion in the bulk. We then introduce a chemically permeable planar surface of two immiscible liquids in the vicinity of the particle and provide explicit solutions to the chemo-hydrodynamics of this system. Finally, we study the case of an isotropically phoretic particle hovering above an interface as a function of interfacial solute permeability and viscosity contrast.
Understanding the generation of large-scale magnetic fields and flows in magnetohydro-dynamical (MHD) turbulence remains one of the most challenging problems in astrophysical fluid dynamics. Although much work has been done on the kinematic generation of large-scale magnetic fields by turbulence, relatively little attention has been paid to the much more difficult problem in which fields and flows interact on an equal footing. The aim is to find conditions for long-wavelength instabilities of stationary MHD states. Here, we first revisit the formal exposition of the long-wavelength linear instability theory, showing how long-wavelength perturbations are governed by four mean field tensors; we then show how these tensors may be calculated explicitly under the ‘short-sudden’ approximation for the turbulence. For MHD states with relatively little disorder, the linear theory works well: average quantities can be readily calculated, and stability to long-wavelength perturbations determined. However, for disordered basic states, linear perturbations can grow without bound and the purely linear theory, as formulated, cannot be applied. We then address the question of whether there is a linear response for sufficiently weak mean fields and flows in a dynamical (nonlinear) evolution, where perturbations are guaranteed to be bounded. As a preliminary study, we first address the nature of the response in a series of one-dimensional maps. For the full MHD problem, we show that in certain circumstances, there is a clear linear response; however, in others, mean quantities – and hence the nature of the response – can be difficult to calculate.
Turbulent shear flows driven by a combination of a pressure gradient and buoyancy forcing are investigated using direct numerical simulations. Specifically, we consider the set-up of a differentially heated vertical channel subject to a Poiseuille-like horizontal pressure gradient. We explore the response of the system to its three control parameters: the Grashof number $Gr$, the Prandtl number $Pr$, and the Reynolds number $Re$ of the pressure-driven flow. From these input parameters, the relative strength of buoyancy driving to the pressure gradient can be quantified by the Richardson number $Ri=Gr/Re^2$. We compare the response of the mixed vertical convection configuration to that of mixed Rayleigh–Bénard convection, and find a nearly identical behaviour, including an increase in wall friction at higher $Gr$, and a drop in the heat flux relative to natural convection for $Ri=O(1)$. This closely matched response is despite vastly different flow structures in the systems. No large-scale organisation is visible in visualisations of mixed vertical convection – an observation that is confirmed quantitatively by spectral analysis. This analysis, combined with a statistical description of the wall heat flux, highlights how moderate shear suppresses the growth of small-scale plumes and reduces the likelihood of extreme events in the local wall heat flux. Vice versa, starting from a pure shear flow, the addition of thermal driving enhances the drag due to the emission of thermal plumes.
In this paper, a novel tensioning and relaxing wearable system is introduced to improve the wearing comfort and load-bearing capabilities of knee exoskeletons. The research prototype of the novel system, which features a distinctive overrunning clutch drive, is presented. Through co-simulation with ANSYS, MATLAB, and SOLIDWORKS software, a comprehensive multi-objective optimization is performed to enhance the dynamics performance of the prototype. Firstly, the wearing contact stiffness of the prototype and the mechanical parameters of the relevant materials are simulated and fitted based on the principle of functional equivalence. And then, its equivalent nonlinear circumferential stiffness model is obtained. Secondly, to enhance the wearing comfort of the exoskeleton, a novel comprehensive performance evaluation index, termed wearing comfort, is introduced. The index considers multiple factors such as the duration of vibration transition, the acceleration encountered during wear, and the average pressure applied. Finally, through the utilization of this indicator, the system’s dynamics performance is optimized via multi-platform co-simulation, and the simulation results validate the effectiveness of the research method and the proposed wearable comfort index. The theoretical basis for the subsequent research on the effectiveness of prototype weight-bearing is provided.
Bell’s palsy is acute facial palsy due to inflammation involving the facial nerve related to infections. Rates have not been noted to differ by ethnicity. We studied the lifetime prevalence in First Nations and all other Manitobans in people with type 2 diabetes mellitus aged 7 and older in 2013–2014 and 2016–2017. We found a crude lifetime prevalence of 9.9% [95% CI 9.4–10.4%] in the First Nations population versus 3.9% [95% CI 3.8–4.0%] in all other Manitobans. It is unknown if there were differences in glycemic control. The increased prevalence was found in all five provincial health regions. This study indicates that ethnicity may be an important risk factor for Bell’s palsy.
The 2022 war in Ukraine has produced the biggest virtual humor archive in the history of wars. We argue that Ukrainian war humor is a form of civic activism in the name of Ukraine’s sovereignty. This civic activism is defined by resistance, solidarity, vigilance, and dedication to victory. The war humor circulates locally as well as on a global stage. It expresses the government’s positions and the people’s voices and empowers those affected by this war. Ukrainian war humor documents experiences of war realities; provides moral commentaries and emotional and aesthetic interpretations; and articulates visions for the future of Ukraine as a sovereign European state.
This study explores the feasibility of applying ragdoll physics, a procedural animation, and related game-engine technologies to create real-time simulations for investigating crowd disasters.
Methods
We harnessed the power of the Unity Game Engine to develop real-time simulation for the dynamics of a crowd disaster with rendering of scene objects and user interface (UI) elements. Humanoid agents with trigger colliders were linked to color schemes representing impact forces sustained with lethal thresholds ranging from 500 to 550 pounds force for males and 450 to 500 pounds force for females. The simulation enables users to manipulate parameters such as population, crowd density, directional movement and forces applied.
Results
Our simulation showcases an animated real-time depiction of a crowd disaster and enables visualization of casualties, both injured and dead, based upon a quantitative evaluation of the forces sustained.
Conclusions
Utilization of the Unity Game Engine for the development of visually-engaging real-time crowd disaster simulation has promising outcomes. This novel approach for modeling and analysis of crowd dynamics may provide valuable insights with applications in mass gatherings, crowd management, safety, and preparedness.
Self-sustained thermoacoustic oscillations as observed in low-emission combustion- involved gas turbines and aero-engines involve complicated thermal fluid–acoustics interaction and rich nonlinear dynamics. Such pulsating oscillations are known as thermoacoustic instability. When it occurs, large-amplitude limit cycle oscillations (LCOs) of thermodynamic parameters are frequently observed. These LCOs could cause overheating, flame flashback, and even engine failures. Thus it is critical to understand and predict the generation mechanisms and nonlinear dynamics behaviours, and then develop corresponding control approaches to prevent or control the onset of such instabilities. In this work, we develop and extend the classical van der Pol oscillators by integrating a physics-informed neural networks (PINNs) algorithm with a modelled nonlinear Rijke-type thermoacoustic combustor. The theoretical Rijke tube system (with Galerkin expansion and modified King's law implemented) and a CFD simulation model are applied to provide ‘training/calibration data’ for the extended van der Pol (EVDP)-PINNs model. The optimized EVDP oscillators are confirmed to be capable of capturing the key nonlinear characteristics by comparing the transient growth behaviours of thermodynamic perturbations and LCO amplitude and frequency. Further investigations are conducted to obtain Hopf bifurcation and amplitude death (AD) characteristics. Comparison is then made to the coupled EVDP systems. Quite similar Hopf bifurcation features, but differences in regions of AD, are observed. In general, we demonstrate an applicable approach to intelligently ‘learn’ a nonlinear thermoacoustic system and to create reliable EVDP oscillator systems, which have great potential to contribute to the development and testing of control approaches, such as the coupling described in this work, which may replace costly experimental tests.
Nuclear radiological emergencies are classified as low frequency, but high impact events. Radiophobia and fear of deleterious outcomes often evokes hesitancy among responders. This review explored PPE use as a protective mechanism for responders’ safety and identified tools that promote PPE efficacy among first responders during nuclear radiological events.
Methods
A systematic literature review was conducted using five scientific databases. More than 5,500 articles were screened to identify literature relating to “PPE use” by first responders during “nuclear radiological events”.
Results
Regulatory agencies such as the IAEA and the NRC assert that PPE, (when worn correctly and consistently) minimizes radiation exposure. Adequate training of first responders emerged as a critical determinant to support appropriate PPE selection and usage during radiological emergencies. This included new employee trainings and refresher courses for existing employees. Pedagogical tools highlighted in the literature included tabletop exercises, safety huddles, trial runs for donning and doffing of new gear (with emphasis on air-fed suits), just-in-time training and virtual reality simulations.
Conclusions
Education on the effective use of PPE is essential to promote self-efficacy among medical staff and other first responders during nuclear radiological events. Comprehensive training will reduce unintended exposures, decrease hesitancy, and maximize employee safety.