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1.
Proc Natl Acad Sci U S A ; 120(20): e2216972120, 2023 05 16.
Artigo em Inglês | MEDLINE | ID: mdl-37155850

RESUMO

Mass shootings are becoming more frequent in the United States, as we routinely learn from the media about attempts that have been prevented or tragedies that destroyed entire communities. To date, there has been limited understanding of the modus operandi of mass shooters, especially those who seek fame through their attacks. Here, we explore whether the attacks of these fame-seeking mass shooters were more surprising than those of others and clarify the link between fame and surprise in mass shootings. We assembled a dataset of 189 mass shootings from 1966 to 2021, integrating data from multiple sources. We categorized the incidents in terms of the targeted population and shooting location. We measured "surprisal" (often known as "Shannon information content") with respect to these features, and we scored fame from Wikipedia traffic data-a commonly used metric of fame. Surprisal was significantly higher for fame-seeking mass shooters than non-fame-seeking ones. We also registered a significant positive correlation between fame and surprisal controlling for the number of casualties and injured victims. Not only do we uncover a link between fame-seeking behavior and surprise in the attacks but also we demonstrate an association between the fame of a mass shooting and its surprise.


Assuntos
Armas de Fogo , Violência com Arma de Fogo , Estados Unidos , Humanos
2.
J Urban Health ; 101(3): 571-583, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38831155

RESUMO

Mass shootings (incidents with four or more people shot in a single event, not including the shooter) are becoming more frequent in the United States, posing a significant threat to public health and safety in the country. In the current study, we intended to analyze the impact of state-level prevalence of gun ownership on mass shootings-both the frequency and severity of these events. We applied the negative binomial generalized linear mixed model to investigate the association between gun ownership rate, as measured by a proxy (i.e., the proportion of suicides committed with firearms to total suicides), and population-adjusted rates of mass shooting incidents and fatalities at the state level from 2013 to 2022. Gun ownership was found to be significantly associated with the rate of mass shooting fatalities. Specifically, our model indicated that for every 1-SD increase-that is, for every 12.5% increase-in gun ownership, the rate of mass shooting fatalities increased by 34% (p value < 0.001). However, no significant association was found between gun ownership and rate of mass shooting incidents. These findings suggest that restricting gun ownership (and therefore reducing availability to guns) may not decrease the number of mass shooting events, but it may save lives when these events occur.


Assuntos
Armas de Fogo , Incidentes com Feridos em Massa , Propriedade , Suicídio , Humanos , Armas de Fogo/estatística & dados numéricos , Estados Unidos/epidemiologia , Propriedade/estatística & dados numéricos , Incidentes com Feridos em Massa/estatística & dados numéricos , Suicídio/estatística & dados numéricos , Ferimentos por Arma de Fogo/epidemiologia , Ferimentos por Arma de Fogo/mortalidade , Eventos de Tiroteio em Massa
3.
Brain Topogr ; 2024 Jul 11.
Artigo em Inglês | MEDLINE | ID: mdl-38990422

RESUMO

Shooting is a fine sport that is greatly influenced by mental state, and the neural activity of brain in the preparation stage of shooting has a direct influence on the level of shooting. In order to explore the brain neural mechanism in the preparation stage of pistol shooting under audiovisual restricted conditions, and to reveal the intrinsic relationship between brain activity and shooting behavior indicators, the electroencephalography (EEG) signals and seven shooting behaviors including shooting performance, gun holding stability, and firing stability, were experimentally captured from 30 shooters, these shooters performed pistol shooting under three conditions, normal, dim, and noisy. Using EEG microstates combined with standardized low-resolution brain electromagnetic tomography (sLORETA) traceability analysis method, we investigated the difference between the microstates characteristics under audiovisual restricted conditions and normal condition, the relationship between the microstates characteristics and the behavioral indicators during the shooting preparation stage under different conditions. The experimental results showed that microstate 1 corresponded to microstate A, microstate 2 corresponded to microstate B, and microstate 4 corresponded to microstate D; Microstate 3 was a unique template, which was localized in the occipital lobe, its function was to generate the "vision for action"; The dim condition significantly reduced the shooter's performance, whereas the noisy condition had less effect on the shooter's performance; In audiovisual restricted conditions, the microstate characteristics were significantly different from those in the normal condition. Microstate 4' parameters decreased significantly while microstate 3' parameters increased significantly under restricted visual and auditory conditions; Dim condition required more shooting skills from the shooter; There was a significant relationship between characteristics of microstates and indicators of shooting behavior; It was concluded that in order to obtain good shooting performance, shooters should improve attention and concentrate on the adjustment of collimator and target's center leveling relation, but the focus was slightly different in the three conditions; Microstates that are more important for accomplishing the task have less variation in their characteristics over time; Similar conclusions to previous studies were obtained at the same time, i.e., increased visual attention prior to shooting is detrimental to shooting performance, and there is a high positive correlation with microstate D for task completion. The experimental results further reveal the brain neural mechanism in the shooting preparation stage, and the extracted neural markers can be used as effective functional indicators for monitoring the brain state in the shooting preparation stage of pistols.

4.
Scand J Med Sci Sports ; 34(5): e14647, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38736188

RESUMO

In rifle shooting, suppressing unwanted thoughts can backfire in one's performance, causing athletes to behave contrary to their desired intention and further deteriorate their performance. PURPOSE: This study examined how priming attentional and negative cues affected participants' shooting performances toward ironic error targets under cognitive load conditions in Stroop task across two experiments. METHODS: Semi-elite biathletes (Experiment 1, n = 10; Experiment 2, n = 9) participated in the study. The study used a within-subject quasi-experimental design, particularly a one-way repeated measures multivariate analysis of variance and a 2 × 2 fully repeated measures analysis of variance, to determine the participants' hit rates and shooting response times (RTs). In both experiments, the participants completed the reverse-Stroop-based target shooting performance under low- and high-cognitive load conditions while receiving frequent priming attentional and negative cues. RESULTS: The findings from Experiment 1 suggest that regulating repetitive priming attentional thoughts is efficacious in mitigating the likelihood of ironic performance errors and interference effects. The results of Experiment 2 show that repetitive priming negative cues resulted in negligible ironic error hit rates and slower RTs in target hits under high-cognitive load conditions. The Bayesian analyses provided evidence supporting the null hypotheses. CONCLUSION: Trying to control repetitive priming attentional and negative thoughts reduces ironic performance errors to a similar degree under cognitive load conditions among biathletes, regardless of interference effects. Further research is needed to determine the effectiveness of suppressing task-relevant negative instructions in reducing the likelihood of ironic performance errors under pressure.


Assuntos
Desempenho Atlético , Atenção , Armas de Fogo , Tempo de Reação , Humanos , Masculino , Adulto Jovem , Adulto , Desempenho Atlético/psicologia , Desempenho Atlético/fisiologia , Atenção/fisiologia , Noruega , Feminino , Sinais (Psicologia) , Teste de Stroop , Atletas/psicologia , Cognição , Teorema de Bayes
5.
Proc Natl Acad Sci U S A ; 118(23)2021 06 08.
Artigo em Inglês | MEDLINE | ID: mdl-34074780

RESUMO

Media coverage in the aftermath of mass shootings frequently documents expressions of sadness and outrage shared by millions of Americans. This type of collective emotion can be a powerful force in establishing shared objectives and motivating political actions. Yet, the rise in mass shootings has not translated into widespread legislative progress toward gun control across the nation. This study is designed to shed light on this puzzle by generating causal evidence on the temporal and geographic scale of collective emotional responses to mass shootings. Using a unique continuous survey on Americans' daily emotions without reference to specific events, our empirical strategy compares the daily emotions of residents interviewed after to those interviewed before 31 mass shootings within the same city or state where the event occurred. We found that the emotional impact of mass shootings is substantial, but it is local, short-lived, and politicized. These results suggest that if policy reform efforts are to draw on collective emotional responses to these events, they will likely have to start at the local level in the immediate aftermath of a mass shooting.


Assuntos
Emoções , Homicídio , Meios de Comunicação de Massa , Política , Armas de Fogo , Humanos , Estados Unidos
6.
Anim Welf ; 33: e5, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38487790

RESUMO

The present study aimed to investigate the relationship between shooting angle to the head and animal welfare outcomes in the hunt of young harp seals (Pagophilus groenlandicus). The study population consisted of young harp seals belonging to the Greenland Sea harp seal population. A sample of 171, 2-7 weeks old, weaned harp seals of both sexes were included. The study was conducted as an open, randomised parallel group designed trial during the regular hunt. The animals were allocated into four groups, A-D, according to the observed shooting angle to the head, defined as the angle between the direction of the shot and the longitudinal axis of the animal's head: (A) directly from the front; (B) obliquely from the front; (C) directly from the side; and (D) obliquely or directly from behind. Instantaneous death rate (IDR) and time to death (TTD) were the main variables. The mean IDR differed significantly between groups and was highest in group B (96.8%) and lowest in group C (66.7%). For all groups combined it was 84.2%. The mean TTD for seals not rendered instantaneously unconscious or dead (n = 27) differed significantly between groups and was shortest in group A (16 s) and longest in group C (85 s). However, the number of animals included in the TTD analysis was limited. In conclusion, based on the significantly higher IDR, the shooting angle obliquely from the front is recommended to help achieve the best animal welfare outcomes during the hunt of young harp seals.

7.
Int J Sport Nutr Exerc Metab ; 34(3): 154-163, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38266631

RESUMO

This study investigated the effects of the timing of caffeine (3 mg/kg body mass) ingestion on three-point shooting accuracy and other performance parameters during a basketball exercise simulation test (BEST). Eighteen college basketball players (mean ± SD: age = 24.4 ± 1.5 years, height = 181.7 ± 9.5 cm, body mass = 80.9 ± 13.2 kg) underwent one familiarization trial and three main conditions in a randomized order: (a) placebo (maltodextrin) and placebo, (b) caffeine and placebo, and (c) placebo and caffeine. Participants ingested either the placebo or caffeine pill 75 and 15 min before performing four quarters of the BEST and a three-point shooting protocol. During each quarter, participants completed 16 rounds of the BEST and ten three-point shots. Vertical jump height, 6 m sprint timing, BEST completion timing, three-point shooting accuracy, heart rate, rate of perceived exertion, blood glucose, blood lactate, and psychological measures pertaining to performance were measured. The BEST completion timing differed among conditions (placebo and placebo = 26.4 ± 2.0 s, caffeine and placebo = 25.8 ± 2.0 s, placebo and caffeine = 25.9 ± 2.1 s; p = .031) but not three-point shooting accuracy (placebo and placebo = 12.33 ± 4.10; caffeine and placebo = 12.61 ± 2.81; placebo and caffeine = 11.67 ± 3.77; p = .648), vertical jump height, or sprint times. Manipulating ingestion timing of caffeine did not improve three-point shooting accuracy, vertical jump height, or 6 m sprint timings, but caffeine can improve performance times during simulated basketball exercise irrespective of ingestion timing.


Assuntos
Desempenho Atlético , Basquetebol , Humanos , Adulto Jovem , Adulto , Cafeína , Desempenho Atlético/fisiologia , Basquetebol/fisiologia , Teste de Esforço , Ingestão de Alimentos
8.
Artigo em Inglês | MEDLINE | ID: mdl-38386172

RESUMO

Grigori Yefimovich Rasputin, a confidant of Tsar Nicholas and his wife, was murdered by Prince Yussupov and his co-conspirators in the cellar of the prince's Moika Palace in St Petersburg, Russia, on the evening of December 30th, 1916 (December 17th in the Russian calendar). The narrative of his death is largely based on Prince Yussupov's published memoirs and has Rasputin being poisoned with cyanide, shot, bludgeoned, and finally drowned. A review of the available forensic material, however, shows a photograph with a contact gunshot wound to Rasputin's forehead. This would indicate that he was dead prior to being dropped into the Little Nevka River. His distaste for sweet foods and the absence of poison at autopsy would also suggest that the story of cyanide toxicity was fabricated. Yussupov's description of Purishkevich firing at Rasputin from a distance as he ran across the courtyard in an attempt to escape would also not be consistent with the post mortem photograph. The simplest version of the events would be that Rasputin was executed by a contact gunshot wound to the forehead when he visited the Yussupov Palace. While it appears that the events of that fateful evening have been embellished, it is certainly not uncommon for perpetrators of homicides to provide histories that are later shown to be at odds with the truth. Re-evaluation of historic cases may provide compelling evidence for alternative interpretations to the popular historic record.

9.
Nanotechnology ; 34(41)2023 Jul 27.
Artigo em Inglês | MEDLINE | ID: mdl-37429258

RESUMO

Stretching elastomer bands to accumulate strain energy, for a sudden projectile launching, has been an old hunting skill that will continue to find new applications in miniaturized worlds. In this work, we explore the use of highly resilient and geometry-tailored ultrathin crystalline silicon nanowires (SiNWs) as elastic medium to fabricate the first, and the smallest, mechanical slingshot. These NW-morphed slingshots were first grown on a planar surface, with desired layout, and then mounted upon standing pillar frames, with a unique self-hooking structure that allows for a facile and reliable assembly, loading and shooting maneuver of microsphere payloads. Impressively, the elastic spring design can help to store 10 times more strain energy into the NW springs, compared with the straight ones under the same pulling force, which has been strong enough to overcome the sticky van der Waals (vdW) force at the touching interfaces that otherwise will hinder a reliable releasing onto soft surface with low-surface energy or adhesion force, and to achieve a directional shooting delivery of precise amount of tiny payload units onto delicate target with the least impact damage. This NW-morphing construction strategy also provides a generic protocol/platform to fast design, prototype, and deploy new nanoelectromechanical and biological applications at extremely low costs.

10.
Scand J Med Sci Sports ; 33(10): 2039-2045, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37430459

RESUMO

Acquisition evaluations are expensive, have a high time liability, and tend to prioritize engineering requirements over human factors and good experimental design. Shooting serials usually consist of static prone shooting to minimize movement variability, increase reliability of accuracy and timing data or use a single data point to make acquisition decisions. To better understand the number of trials required to achieve representative performance of accuracy and timing, 60 shots from the standing unsupported position while cyclically moving the weapon from the low ready to shoot was utilized. Intra-class correlations, standard error of measurement, minimal detectable change, and sequential averaging analysis (SAA) were used to evaluate the variables of radial error, shot interval, x-bias and y-bias over the 60 shots. The number of trials required to achieve an intraclass correlation of greater than 0.8 ranged from 2 (shot interval) to 58 (y-bias), whereas SAA varied between 3 (x-bias) and 43 (shot interval) trials. When averaging 10 shots at a time, the moving intraclass correlation remained above 0.8 for radial error and y-bias between 7 and 15 shots, shot interval from the second shot, but x-bias never reached 0.8. The number of trials required to satisfy each reliability method was inconsistent, in line with previous literature. Given the limitations identified in the literature as well as practical considerations such as the preference for prioritizing radial error reasonable performance stability can be achieved after 15 shots, and using the moving intraclass correlation results it is recommended that the first six shots are discarded with the following nine shots used for analysis.


Assuntos
Armas de Fogo , Movimento , Humanos , Reprodutibilidade dos Testes , Posição Ortostática
11.
Scand J Med Sci Sports ; 33(2): 178-188, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36315055

RESUMO

To benefit from virtual reality (VR) as a complementary tool for training, coaches must determine the proper tools and variables for tracking sports performance. We explored the basketball shooting at several scales (basket-ball, ball-player, and player systems) by monitoring success-rate, and ball and body kinematics. We measured how these scales of analysis allowed tracking players' expertise and perceptual sensitivity to basket distance. Experienced and novice players were instructed to naturally throw and swish an instrumented ball in a stereoscopically rendered virtual basket. We challenged their perceptual-motor systems by manipulating the distance of the virtual basket while keeping the surrounding environment unchanged. The success-rate accounted for the players' shooting adjustments to the manipulation of basket distance and allowed tracking their expertise. Ball kinematics also reflected the manipulation of distance and allowed detecting gender, but did not reflect the players' expertise. Finally, body kinematics variables did not echo players' adjustments to the distance manipulation but reflected their expertise and gender. The results gained at each scale of analysis are discussed with regard to the simulator's construct, biomechanical, and psychological fidelity.


Assuntos
Desempenho Atlético , Basquetebol , Realidade Virtual , Humanos , Desempenho Atlético/psicologia , Fenômenos Biomecânicos
12.
Scand J Med Sci Sports ; 33(1): 84-98, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36310526

RESUMO

OBJECTIVE: To understand the mechanism of dual activation of the brain and heart in pistol athletes during shooting performances, through synchronized monitoring of electroencephalogram (EEG) and electrocardiogram (ECG). METHODS: Eighteen adolescents air pistol athletes were placed in a simulated competition environment and performed 40 self-paced shooting tasks, and simultaneously monitored the athletes' EEG, ECG, and shooting performance during the preparation period. RESULTS: (1) In the successful performance, the power values of the alpha wave of the athlete's T7 area showed a significant upward trend 6 s before the shot, but there was no significant change in the alpha wave in the T8 area. In the failure performance, the alpha wave in the T7 and T8 areas did not change significantly 6 s before the shot. (2) The Fz theta wave power value of athletes in successful performance showed a significant upward trend in the 6 s before firing, and in the failure performance, it showed an "inverted U-shaped" characteristic of rising first and then decreasing. (3) Regardless of whether it was a success or a failure, the SMR wave power value of the athlete's central area has no significant change before the shot. (4) At 6 s before the shot, the athlete's heart rate and R-R interval (RRI) in the successful performance showed a significant decline and rise, respectively, but there was no significant change in the failure performance. (5) Approaching the firing time, the athletes' EEG and ECG have a more significant correlation in successful performance and a more synchronized trend, while the correlation was lower in failure performance. CONCLUSIONS: The psychophysiological state of young air pistol athletes was closely related to shooting performance. If the brain-cardiac system maintains a benign dual activation level during the aiming and firing period, it will be beneficial to the improvement of shooting performance, otherwise, it was easy to reduce shooting performance.


Assuntos
Humanos , Adolescente
13.
Int J Audiol ; 62(4): 350-356, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-35341437

RESUMO

OBJECTIVES: The risk of noise injury from recreational firearm use is well known. Despite preventive measures it is uncertain whether it has become less harmful. We assessed whether the association between recreational firearm use and hearing has changed during the last two decades. DESIGN: We used a repeated cross-sectional design and determined hearing thresholds by pure-tone audiometry. Frequency-specific associations between recreational firearm use and hearing thresholds were assessed by multivariate linear regression stratified by sex and adjusted for age and other covariates. STUDY SAMPLE: Two cross-sectional population-based cohorts 20 years apart (1998 and 2018) comprised 27,580 (53% women, mean age 53 years) and 26,606 individuals (56% women, mean age 54 years), respectively. RESULTS: Recreational firearm use was reported by 28% in 1998 and 30% in 2018. The proportion that reported wearing hearing protection increased. Exposure to recreational firearms was associated with elevated thresholds at 3-6 kHz in both cohorts. The association increased with the number of lifetime shots. The associations increased by age and were substantially smaller in the most recent cohort. CONCLUSIONS: Analyses of two cohorts revealed a reduction in the association between recreational firearm use and hearing over 20 years, coinciding with the introduction of hearing preservation measures.


Assuntos
Surdez , Armas de Fogo , Perda Auditiva Provocada por Ruído , Humanos , Feminino , Pessoa de Meia-Idade , Masculino , Perda Auditiva Provocada por Ruído/diagnóstico , Perda Auditiva Provocada por Ruído/epidemiologia , Perda Auditiva Provocada por Ruído/etiologia , Estudos Transversais , Ruído , Audiometria de Tons Puros , Limiar Auditivo
14.
Sensors (Basel) ; 23(6)2023 Mar 16.
Artigo em Inglês | MEDLINE | ID: mdl-36991871

RESUMO

In this study, we investigated the neural and behavioral mechanisms associated with precision visual-motor control during the learning of sport shooting. We developed an experimental paradigm adapted for naïve individuals and a multisensory experimental paradigm. We showed that in the proposed experimental paradigms, subjects trained well and significantly increased their accuracy. We also identified several psycho-physiological parameters that were associated with shooting outcomes, including EEG biomarkers. In particular, we observed an increase in head-averaged delta and right temporal alpha EEG power before missing shots, as well as a negative correlation between theta-band energies in the frontal and central brain regions and shooting success. Our findings suggest that the multimodal analysis approach has the potential to be highly informative in studying the complex processes involved in visual-motor control learning and may be useful for optimizing training processes.


Assuntos
Desempenho Psicomotor , Esportes , Humanos , Desempenho Psicomotor/fisiologia , Psicofisiologia , Aprendizagem/fisiologia , Encéfalo/fisiologia , Eletroencefalografia
15.
Sensors (Basel) ; 23(14)2023 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-37514707

RESUMO

The implementation of a fast and efficient computer tool for field coverage studies in urban mobile radio systems is presented in this work. An accelerated and tailored ray launching method takes advantage of a ray tracing programmable framework optimized for massively parallel processing on GPUs. The PlotOptiX API is used to customize the code before applying the electromagnetic equations. The proposed code is described, and results are shown to demonstrate its correct operation. A high number of diffractions and reflections can be tracked in each ray from the transmitter to the receiver. In addition to the typical point-to-point simulation, measurement planes can also be set as receivers to provide fast predictions in wide urban areas.

16.
Sensors (Basel) ; 23(2)2023 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-36679461

RESUMO

A novel type of neural network with an architecture based on physics is proposed. The network structure builds on a body of analytical modifications of classical numerical methods. A feature of the constructed neural networks is defining parameters of the governing equations as trainable parameters. Constructing the network is carried out in three stages. In the first step, a neural network solution to an equation corresponding to a numerical scheme is constructed. It allows for forming an initial low-fidelity neural network solution to the original problem. At the second stage, the network with physics-based architecture (PBA) is further trained to solve the differential equation by minimising the loss function, as is typical in works devoted to physics-informed neural networks (PINNs). In the third stage, the physics-informed neural network with architecture based on physics (PBA-PINN) is trained on high-fidelity sensor data, parameters are identified, or another task of interest is solved. This approach makes it possible to solve insufficiently studied PINN problems: selecting neural network architecture and successfully initialising network weights corresponding to the problem being solved that ensure rapid convergence to the loss function minimum. It is advisable to use the devised PBA-PINNs in the problems of surrogate modelling and modelling real objects with multi-fidelity data. The effectiveness of the approach proposed is demonstrated using the problem of modelling processes in a chemical reactor. Experiments show that subsequent retraining of the initial low-fidelity PBA model based on a few high-accuracy data leads to the achievement of relatively high accuracy.


Assuntos
Redes Neurais de Computação , Física
17.
J Community Psychol ; 51(7): 2652-2666, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37294273

RESUMO

This qualitative study examines how youth and adult members of 4-H Shooting Sports clubs perceive firearm injury risk and risk reduction, and the applicability of a bystander intervention (BI) risk reduction framework in this community. Semistructured interviews were conducted with 11 youth and 13 adult members of 4-H Shooting Sports clubs across nine US states from March to December of 2021 until thematic saturation was reached. Deductive and inductive thematic qualitative analyses were performed. Six overarching themes emerged: (1) The tendency to view firearm injury as predominantly unintentional in nature; (2) Acknowledgment of a wide array of risks for firearm injury; (3) Perceived barriers to bystander action to prevent firearm injury including knowledge, confidence, and consequences of action; (4) Facilitators of bystander action including a sense of civic responsibility; (5) Direct and indirect strategies to address potential risks for firearm injury; and (6) Belief that BI skills training would be useful for 4-H Shooting Sports. Findings lay the groundwork for applying BI skills training as an approach to firearm injury prevention in 4-H Shooting Sports, similar to how BI has been applied to other types of injury (i.e., sexual assault). 4-H Shooting Sports club members' sense of civic responsibility is a key facilitator. Prevention efforts should attend to the broad array of ways in which firearm injury occurs, including suicide, mass shootings, homicide, and intimate partner violence, as well as unintentional injury.


Assuntos
Armas de Fogo , Violência por Parceiro Íntimo , Suicídio , Ferimentos por Arma de Fogo , Adulto , Adolescente , Humanos , Ferimentos por Arma de Fogo/prevenção & controle , Homicídio
18.
Vox Sang ; 117(3): 299-312, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34558091

RESUMO

BACKGROUND AND OBJECTIVES: Mortality rates, transfusion ratios, trauma management logistics, and assault characteristics from the El Paso mass shooting incident (MSI) are evaluated in comparison to other MSIs. In 2019, El Paso, TX experienced the eighth-deadliest MSIs in modern US history. In this 21st mass killing in the United States of 2019, 19 people died immediately, and four of 27 injured, later died from ballistic injuries. MATERIALS AND METHODS: We examined the victims' injuries, pre-hospital treatments, transfusions, rotational thromboelastometry (ROTEM) interpretation, tranexamic acid (TXA) use, and compared El Paso's outcomes with other MSIs. RESULTS: Fifteen casualties were treated for bullet injuries at University Medical Center (UMC). Three were in critical condition; one died during surgery. Of the remaining victims, two were guarded, and the remaining ten in stable condition. Anatomic trauma locations included chest, abdomen, hip, breast, thigh and arm. Haemostatic agents and TXA were administered to arriving patients. Seven casualties receiving blood products were administered 95 units at UMC (45 red blood cells [RBC], 38 fresh frozen plasma [FFP], 8 platelets and 4 cryoprecipitate). ROTEM guided mass transfusion decisions in three patients. Out of seven MSIs reviewed, El Paso had the highest mortality rate (50.0%) and lowest RBC:FFP:admission ratio (1.18 at UMC). CONCLUSION: We report the greatest proportion of transfusions per admission for an MSI and are first to discuss ROTEM roles to guide transfusion and manage coagulopathy during an MSI. This case highlights the severity and impact of MSIs on victims and requirements to follow established transfusion protocols with adjunct use of ROTEM, TXA and haemostatic agents.


Assuntos
Transtornos da Coagulação Sanguínea , Ácido Tranexâmico , Transfusão de Sangue/métodos , Humanos , Plasma , Estudos Retrospectivos , Tromboelastografia/métodos , Ácido Tranexâmico/uso terapêutico
19.
Prev Med ; 165(Pt A): 107304, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36265579

RESUMO

Extreme risk protection orders (ERPOs), also known as red flag laws, are a potential tool to prevent firearm violence, including mass shootings, but little is currently known about the extent of their use in cases of mass shooting threats or about the threats themselves. We collected and abstracted information from ERPO cases from six states (California, Colorado, Connecticut, Florida, Maryland, and Washington). Ten percent (N = 662) of all ERPO cases (N = 6787) were in response to a threat of killing at least 3 people. Using these cases, we created a typology of multiple victim/mass shooting threats, the most common of which was the maximum casualty threat. The most common target for a multiple victim/mass shooting threat was a K-12 school, followed by businesses, then intimate partners and their children and families. Judges granted 93% of petitions that involved these threats at the temporary ERPO stage and, of those cases in which a final hearing was held, judges granted 84% of final ERPOs. While we cannot know how many of the 662 ERPO cases precipitated by a threat would have resulted in a multiple victim/mass shooting event had ERPO laws not been used to prohibit the purchase and possession of firearms, the study provides evidence at least that ERPOs are being used in six states in a substantial number of these kinds of cases that could have ended in tragedy.


Assuntos
Armas de Fogo , Ferimentos por Arma de Fogo , Criança , Humanos , Estados Unidos , Violência , Washington , Colorado , Connecticut , Homicídio/prevenção & controle , Ferimentos por Arma de Fogo/prevenção & controle
20.
Prev Med ; 165(Pt A): 107280, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36183796

RESUMO

Intentional shootings in K-12 schools in the U.S. persist as a public health problem. The number of shootings in K-12 schools has increased precipitously since 2017. And with approximately 100,000 K-12 public schools nationally serving 51 million children, investing in a comprehensive gun violence prevention strategy is critical. Unfortunately, our current school gun violence prevention approach almost exclusively centers reactive strategies that are in place to respond to acts of gun violence in the moment, rather than preventive strategies that would prevent them from occurring at all. Reliance on these strategies alone, however, is not sufficient. In line with the core tenets of public health prevention and the Whole School, Whole Child, Whole Community model, we present a more expansive school gun violence prevention framework that broadens the spectrum of what constitutes "school gun violence prevention." Our work highlights how enhancing basic neighborhood and school structures-including investments in public libraries, affordable housing, and universal school-based violence prevention programs-are key to both preventing gun violence and promoting well-being. We also highlight the role of stricter gun laws, reasonable school security efforts, bystander interventions, building awareness within school communities, and meaningful investments in early interventions and mental health services. Children, who have been tragically exposed to any number of adverse experiences in the wake of the COVID-19 pandemic, deserve more reasoned choices and large-scale investments in understanding and cutting off the root causes of school gun violence; not just a reliance on strategies that focus on what to do in the moment of a violent act. As gun violence in K-12 schools persists, we must reframe the discourse about school gun violence around prevention, not reaction.


Assuntos
COVID-19 , Armas de Fogo , Violência com Arma de Fogo , Criança , Humanos , Estados Unidos , Violência com Arma de Fogo/prevenção & controle , Pandemias , Instituições Acadêmicas
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