Dynamic mechanical response and crack evolution law of raw coal loaded by dynamic-static coupling under three-dimensional constraints.

This paper presents the investigation of the dynamic mechanical properties of coal rock under complex stress conditions at depth, based on the improved Separate Hopkinson Pressure Bar Test System. A total of 15 groups of coal samples were used to perform dynamic impact tests under different conditions. The changing rules of dynamic strength, crushing, fractal dimension and damage modes of coal under different stress conditions were analyzed. A total of nine groups of coal samples were selected for numerical simulation using ANSYS/LS-DYNA. The results show that: (1) The stress-strain curves of coal specimens under different strain rates, different confining pressures and axial pressures have basically the same trend and the curves show a certain jump forward. (2) The peak dynamic stress of the coal specimens increased linearly with the increase of strain rate and confining pressure, and the ambient pressure limited the expansion of internal cracks of the coal specimens under impact loading. Based on the experimental and simulated data, the maximum relative errors between the experimental and simulated data were determined to be 2.9578% for Group A, 6.177% for Group B, and 6.382% for Group C, respectively. (3) The damage modes of the coal samples under the three-dimensional dynamic-static combined loading were mainly "X" type and "conical" shear damage. The fractal dimension increases with the increase of strain rate, decreases with the increase of confining pressure, and first decreases and then increases with the increase of axial pressure. This research achievement can provide theoretical support for the prevention of dynamic disasters in deep coal mine engineering.

Vulnerability, Preparedness, and Previous Experience of Disasters Among the Population of a High Hazard Region-Rural Southern Sindh, Pakistan.

A cross-sectional, mixed-method study was conducted in Badin, a rural area in southern Sindh, which is considered a high-risk disaster zone, to assess the vulnerability, preparedness, and disaster experiences of the coastal population. A multistage sampling technique was employed to select the villages, study area, and 3 distinct populations (I, II, and III). Family heads of households were recruited for population I, village heads for population II, and community support group leaders from selected clusters for population III. The survey was conducted through face-to-face interviews. The results revealed that the population of rural southern Sindh, Pakistan, is highly vulnerable to disasters and exhibits lower levels of preparedness. The statistics about the vulnerable population may prove helpful in designing policies targeting specific groups to mitigate hazards in the future.

Ethical-legal dilemmas of nursing practice in emergencies and disasters: a scoping review.

OBJECTIVE: To map the ethical-legal dilemmas related to nursing practice in emergency and disaster situations. METHOD: A scoping review developed in accordance with the JBI method, whose information sources were accessed in databases, in addition to gray literature. The selection was made by reading the titles, abstracts and descriptors, observing eligibility criteria, including two reviewers and a third in case of discrepancies. After reading, data extraction and content analysis of 17 selected studies were carried out. RESULTS: Thirteen ethical-legal dilemmas were mapped related to professional/functional duty towards the family, lack of personal protective equipment and unsafe conditions at work, preparation and availability for action, skills, limits imposed by victims' religion, obligation to provide care. CONCLUSION: Professionals, researchers and representatives of the category need to resolve demands that involve acting in emergencies and disasters, (re)cognizing the ethical-legal dilemma, and seeking (re)legal frameworks and observance of the fundamental/ethical principles that govern the profession, in the sense to support decision-making and the development of legally safe practices.

Post-earthquake dizziness and its psychiatric comorbidities among adolescents following the 2023 Kahramanmaras earthquakes in Turkey.

OBJECTIVE: Natural disasters, such as earthquakes, have detrimental effects on mental health. The occurrence of dizziness following earthquakes, termed post-earthquake dizziness syndrome (PEDS), has been noted in the epicenter and surrounding areas. The current study aimed to explore the prevalence of PEDS and its association with psychiatric disorders among adolescents. METHODS: The sample consisted of 100 adolescents, aged 10-17 years, who had no history of vertigo or dizziness and were treated at a child and adolescent psychiatry outpatient clinic. RESULTS: In the aftermath of the earthquake, 68.0% of the adolescents reported experiencing PEDS. A higher prevalence of PEDS was found among female adolescents compared to males. The most frequently reported symptom of PEDS was a sensation of ground shaking, typically experienced indoors within a week following the earthquake. Unpaired t-test analysis revealed that adolescents with PEDS had significantly higher scores on scales measuring panic disorder, generalized anxiety disorder, and post-traumatic stress disorder compared to those without PEDS. CONCLUSIONS: In summary, the findings highlight the potential association between PEDS and psychiatric disorders in adolescents. However, the underlying mechanisms remain elusive, necessitating further research to elucidate the connections between PEDS and psychiatric conditions for more effective treatment strategies.

Relationship Between Severity and Length of Exposure to COVID-19 Parameters and Resulting Government Responses and the Suicide Crisis Syndrome (SCS).

OBJECTIVE: The COVID-19 pandemic has had a globally devastating psychosocial impact. A detailed understanding of the mental health implications of this worldwide crisis is critical for successful mitigation of and preparation for future pandemics. Using a large international sample, we investigated in the present study the relationship between multiple COVID-19 parameters (both disease characteristics and government responses) and the incidence of the suicide crisis syndrome (SCS), an acute negative affect state associated with near-term suicidal behavior. METHODS: Data were collected from 5528 adults across 10 different countries in an anonymous web-based survey between June 2020 and January 2021. RESULTS: Individuals scoring above the SCS cut-off lived in countries with higher peak daily cases and deaths during the first wave of the pandemic. Additionally, the longer participants had been exposed to markers of pandemic severity (eg, lockdowns), the more likely they were to screen positive for the SCS. Findings reflected both country-to-country comparisons and individual variation within the pooled sample. CONCLUSION: Both the pandemic itself and the government interventions utilized to contain the spread appear to be associated with suicide risk. Public policy should include efforts to mitigate the mental health impact of current and future global disasters.

Utilization of the Disaster Medical Assistance Team (DMAT) in an Inner-City Emergency Department During the COVID-19 Pandemic.

OBJECTIVE: To evaluate the effect of the Disaster Medical Assistance Team (DMAT) in an inner-city emergency department during the coronavirus disease (COVID-19) pandemic. METHODS: Data were abstracted from individual emergency department encounters over 6 weeks. The study compared left without being seen (LWBS) percentage, door-to-provider, and door-to-disposition times for 2 weeks before, during, and after the DMAT. RESULTS: The LWBS percentages for the 2 weeks before and after the DMAT were 16.2% and 11.6%, respectively. The LWBS percentage during the DMAT was 8.1%. Door-to-disposition times for the 2 weeks before and after the DMAT were 7.36 hours and 8.53 hours, respectively. The door-to-disposition during the DMAT was 7.33 hours. Door-to-disposition was statistically significant during the 2 weeks of the DMAT compared to the 2 weeks after the DMAT (7.33 vs 8.53, P < 0.05) but not statistically significant when compared to the period before the DMAT (7.36 vs 7.33, P = 1.00). Door-to-provider time was the longest during the DMAT (122.5 minutes [2.04 hours]) when compared to the time frame before the DMAT (114.54 minutes [1.91 hours]) and after the DMAT (102.84 minutes [1.71 hours]). CONCLUSION: The DMAT had the most positive impact on LWBS percentages. The DMAT showed no improvement in door-to-provider times in the study and only in door-to-disposition times when comparing the time the DMAT was present to after the DMAT departed.

Investigating Factors Influencing Disaster Preparedness Perception of Nurses in Turkey:A Meta-Analytic Approach.

AIM AND BACKGROUND: In contemporary healthcare, the crucial importance of disaster preparedness and response within the nursing profession has gained recognition. Considering the elevated probability of encountering numerous disasters in Türkiye, it is noteworthy that limited research has been conducted in this domain. This study, therefore, aims to investigate the related factors to nurses' disaster preparedness Türkiye through a meta-analysis method. METHODS: The study was conducted based on PRISMA guidelines. We searched the national databases in Türkiye and Web of Science Core Collection. Descriptive studies published in Turkish or English between 01.01.2000-31.12.2021 in Türkiye were included in the study to derive the pooled outputs. RESULTS: A total of nine studies, encompassing a sample size of 3222 nurses, met the inclusion criteria. The meta-analysis' results revealed that gender and prior experience with disasters did not exhibit a statistically significant impact on nurses' disaster preparedness (p>0.05). Conversely, engaging in disaster education programs, familiarizing oneself with disaster plans, and actively participating in disaster drills were found to have a significant positive effect on nurses' preparedness for disasters (p<0.05). However, it is worth noting that the analysis of disaster experience exhibited substantial heterogeneity (I2=85.6%), indicating variations among the included studies. Similarly, the analysis related to reading disaster plans also demonstrated high heterogeneity (I2=77.7%). CONCLUSION: Based on the available evidence from the meta-analysis, it can be concluded that receiving disaster education, reading disaster plans, and participating in disaster drills have a positive and significant impact on nurses' perception of disaster preparedness.

Women's reproductive health in the aftermath of natural disasters in Bangladesh: Prospects for empowerment.

In this study, the authors examine the effect of Cyclone Sidr in 2007 on selected aspects of women's reproductive decision-making in Bangladesh. We used Person in Environment theories to model the effect of cyclone Sidr on the reasons for non-contraception among women who did not want a child. The difference-in-difference approach was used as a research design using Bangladesh Demographic and Health Surveys of 2004 and 2011 to test a model of reasons for non-contraception among a subsample of women who did not want a child. Our results indicated that women experienced fewer social controls on contraceptive use decision-making in the aftermath of a natural disaster.

Use of virtual reality exercises in disaster preparedness training: A scoping review.

Background: The scope and number of disasters have increased over the years. This has called for more robust disaster preparedness training and plans. The use of virtual reality exercises in addition to tabletop exercises is considered a new approach to the preparation of disaster preparedness plans. Virtual reality exercises are being developed to either replace or complement current traditional approaches to disaster preparedness training. Objectives: To review and summarize the current existing literature regarding the effectiveness, advantages and limitations of using virtual reality exercises in disaster preparedness as a complementary/replacement mechanism for real-time drills and tabletop exercises. Methods: In this scoping review, we searched PubMed, Cochrane, EMBASE, PLOS, and Google Scholar for research publications involving virtual reality exercises in disaster training from 2008 to 2022 using "AND" and "OR" operators for the keywords "disaster," "preparedness," "virtual reality," and "tabletop." From a total of 333 articles that resulted in our search and were then evaluated by the authors, 55 articles were finally included in this review. Results: Virtual reality exercises are found to be better in the formulation of disaster preparedness plans compared to tabletop exercises. Virtual reality exercises can be used as the primary means of creating a real-life-like experience in disaster preparedness training and proved at least as better complementary to tabletop exercises. Virtual reality exercises have many advantages over traditional real-life or tabletop exercises and are more cost-effective, but some drawbacks are still identified. Conclusion: The advantages of virtual reality exercises are remarkable and underline their benefits and uses versus costs. We highly encourage decision-makers and institutions dealing in disaster preparedness to adopt using virtual reality exercises in training for disaster preparedness.

Mobile infrared slit-light scanner for rapid eye disease screening.

Purpose: Timely detection and treatment of visual impairments and age-related eye diseases are essential for maintaining a longer, healthier life. However, the shortage of appropriate medical equipment often impedes early detection. We have developed a portable self-imaging slit-light device utilizing NIR light and a scanning mirror. The objective of our study is to assess the accuracy and compare the performance of our device with conventional nonportable slit-lamp microscopes and anterior segment optical coherence tomography (AS-OCT) for screening and remotely diagnosing eye diseases, such as cataracts and glaucoma, outside of an eye clinic. Approach: The NIR light provides an advantage as measurements are nonmydriatic and less traumatic for patients. A cross-sectional study involving Japanese adults was conducted. Cataract evaluation was performed using photographs captured by the device. Van-Herick grading was assessed by the ratio of peripheral anterior chamber depth to peripheral corneal thickness, in addition to the iridocorneal angle using Image J software. Results: The correlation coefficient between values obtained by AS-OCT, and our fabricated portable scanning slit-light device was notably high. The results indicate that our portable device is equally reliable as the conventional nonportable slit-lamp microscope and AS-OCT for screening and evaluating eye diseases. Conclusions: Our fabricated device matches the functionality of the traditional slit lamp, offering a cost-effective and portable solution. Ideal for remote locations, healthcare facilities, or areas affected by disasters, our scanning slit-light device can provide easy access to initial eye examinations and supports digital eye healthcare initiatives.

UN peacekeeper health and risk factors --- a systematic scoping review.

BACKGROUND: Conflicts, natural disasters, and complex emergencies present substantial health challenges to United Nations (UN) peacekeepers deployed in mission areas. This scoping review aims at summarizing previous research on the health of UN peacekeepers and identifies issues for further investigation. METHODS: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) extension for Scoping Reviews, we systematically searched Web of Science, PubMed, EMBASE, Scopus and China National Knowledge Infrastructure (CNKI) for English and Chinese literature published from April 1997 to November 2023. A data charting form was developed by two reviewers to extract relevant themes and provided narrative descriptions. RESULTS: We screened 1079 de-duplicated records and included 143 studies in this scoping review. There were 112 studies on the health status of UN peacekeepers, with more than half on mental health problems such as stress and anxiety. Many studies explored the health status of UN peacekeepers in African countries deployed from mainly U.S., Canada, U.K., China, Australia and Norway. There were 39 studies on the health risk factors of UN peacekeepers, including natural environmental, social environmental, psychological, behavioral lifestyle, biological factors and health service factors. There were 62 articles on the health protection of UN peacekeepers, mainly based on previous deployment experience, with a lack of theoretical guidance from global health perspectives. This scoping review found that health problems of UN peacekeepers are complicated, and whose impacts are cross-border. Social environmental factors were explored the most among health risk factors. Disease prevention measures, medical and health measures, and psychosocial measures were the main health protection for UN peacekeepers. CONCLUSIONS: This scoping review highlighted that health problems of UN peacekeepers were typical global health issues with complicated and cross-border health risk factors. Therefore, comprehensive strategies could be taken from global health perspectives, including multi-phases (before-deployment, during-deployment, and post-deployment), multi-disciplines (public health, medicine, politics, health diplomacy, and others), and multi-levels (the UN, host countries, troop-contributing countries, the UN peacekeeping team, and UN peacekeepers).

Exploring hospital resilience protective or risk factors: lessons for future disaster response efforts.

Background: Hospital resilience is essential in responding to disasters, but current research focuses mainly on frameworks and models rather than the protection of resilience and analysis of risk factors during public health emergencies. This study aims to examine the development of resilience in Chinese frontline hospitals during the initial COVID-19 outbreak in 2020, providing insights for future disaster response efforts. Objectives: We conducted interviews with 26 hospital staff members who were involved in the initial response to the COVID-19 outbreak in China. We used a semi-structured interview approach and employed purposive sampling and snowball sampling techniques. The interview outline was guided by the 'Action Framework' proposed by the World Health Organization (WHO) for responding to infectious disease emergencies. This framework includes dimensions such as command, surveillance, risk communication, medical response, and public health response. We analyzed the collected data using Colaizzi's seven-step data analysis method and the template analysis method. Results: WHO's 'action framework' effectively highlights the factors that contribute to hospital resilience. While medical response, including the availability of materials and facilities, the use of information technology, and the capacity for infectious disease diagnosis and treatment, remains crucial, other important aspects include awareness and beliefs about infections, treatment experience, interdisciplinary collaboration, and more. Additionally, it is essential to establish an intelligent command system, foster trusting partnerships between teams, improve monitoring capabilities for infectious disease agents, enhance risk communication through information synchronization and transparency, strengthen infection control planning, and improve environmental disinfection capabilities for effective public health emergency response. These contradictions significantly impact the enhancement of hospital resilience in dealing with major infectious disease outbreaks. Conclusion: In responding to sudden major infectious diseases, hospitals play a vital role within the healthcare system. Enhancing hospital resilience involves more than just improving treatment capabilities. It also requires effective command coordination at the hospital level, infection control planning, and the deployment of intelligent equipment. Additionally, planning for effective communication and coordination between hospitals, communities, and the national healthcare system can further enhance hospital resilience.

Exploring Volunteer Pharmacists' Experiences in Responding to 2023 Türkiye Earthquakes: A Qualitative Phenomenological Study.

OBJECTIVE: Pharmacists are vital in disaster response efforts, dispensing essential medications, managing pharmacy services, consulting, and educating survivors regarding their medications. Their contributions, however, are often underrepresented in scientific literature. This study aimed to explore the experiences of pharmacists who provided pharmacy services to meet the pharmaceutical needs of the survivors after 2 major earthquakes in Türkiye in 2023. METHODS: This study adopted a phenomenological approach. Data were collected using semi-structured interviews. Purposive sampling was used to invite pharmacists who provided pharmacy services to survivors. Interview transcripts were analyzed following an inductive, reflexive thematic analysis. RESULTS: In total, 15 pharmacists were interviewed. Four main overarching themes "response to the earthquake," "preparedness for the earthquake," "experiences during service delivery," and "mental and physical experiences" were developed. CONCLUSIONS: From participants' experiences, it is essential to expand the clinical responsibilities of pharmacists and train them in providing wound care, administering immunization, and prescribing. Pharmacists should be integrated as essential members of disaster health teams. International health organizations, nongovernmental organizations, and governments are encouraged to work collaboratively and develop disaster management plans including pharmacists in early responders. This might help mitigate the deficiencies and overcome challenges in health-care systems to provide effective patient-centered care by health professionals and respond effectively to disasters.

Short-term changes in mental health help-seeking behaviors following exposure to multiple social stressors and a natural disaster.

In 2020, unprecedented circumstances led to significant mental health consequences. Individuals faced mental health stressors that extended beyond the devastating impact of the COVID-19 pandemic, including widespread social unrest following the murder of George Floyd, an intense hurricane season in the Atlantic, and the politically divisive 2020 election. The objective of this analysis was to consider changes in help-seeking behavior following exposure to multiple social stressors and a natural disaster. Data from Crisis Text Line (CTL), a national text-based mental health crisis counseling service, was used to determine how help-seeking behavior changed in the wake of each event. Wilcoxon rank sum tests assessed changes in help-seeking behavior for each event in 2020 as compared to the same period in 2019. AutoRegressive Integrated Moving Average (ARIMA) models examined if changes in crisis conversation volumes following each event differed. Higher median conversation volumes noted for the COVID-19 pandemic (+1 to +5 conversations), Hurricane Laura (+1 to +7 conversations) and the 2020 Election (+1 to +26 conversations). ARIMA models show substantial increases in help-seeking behavior following the declaration of a national emergency for the COVID-19 pandemic (+4.3 to +38.2%) and following the 2020 election (+3 to +24.44%). Our analysis found that the mental health response following social stressors may be distinct from natural events, especially when natural disasters occur in the context of multiple social stressors. This analysis adds to the growing body of literature considering the mental health impact of exposure to multiple co-occurring societal stressors, like police violence and a global pandemic.

Interdependent network restoration games with incomplete information and bounded rationality.

Communities face the challenge of finding restoration strategies in the aftermath of disasters. In particular, independent and self-interested utility managers devise such strategies for infrastructure through a heuristic decentralized process. This paper takes a game-theoretic approach to model the decentralized and strategic restoration decision making with application to interdependent infrastructure. Particularly, we model the decision process using simultaneous games to investigate decision makers' conflicting preferences. We employ Bayesian games to incorporate the realistic assumptions of poor interagent communication, resulting in incomplete information. Also, we account for behavioral biases such as bounded rationality, cooperative behavior or lack thereof, and equality-driven resource allocations. We test our models using ideal, synthetic interdependent networks, and the realistic infrastructure of Shelby County, TN. Results show that cooperation leads to the best-performing decisions even if others are not cooperative. The necessity of cooperation is even higher when there is a dominant player whose service is vital to other players. Our sensitivity results highlight the significant influence of resource availability and allocation on the performance of restoration plans. Our approach enhances the practicality of decision models for community resilience, and unravels novel policy strategies such as cooperation incentives.

Assessing primary healthcare disaster preparedness: a study in Northern Italy.

AIM: The aim of this paper is to outline the steps taken to develop an operational checklist to assess primary healthcare (PHC) all-hazards disaster preparedness. It then describes a study testing the applicability of the checklist. BACKGROUND: A PHC approach is an essential foundation for health emergency and disaster risk management (H-EDRM) because it can prevent and mitigate risks prior to disasters and support an effective response and recovery, thereby contributing to communities' and countries' resilience across the continuum of the disaster cycle. This approach is in line with the H-EDRM framework, published by the World Health Organization (WHO) in 2019, which emphasizes a whole-of-health system approach in disaster management and highlights the importance of integrating PHC into countries' H-EDRM. Nevertheless, literature focusing on how to practically integrate PHC into disaster management, both at the facility and at the policy level, is in its infancy. As of yet, there is no standardized, validated way to assess the specific characteristics that render PHC prepared for disasters nor a method to evaluate its role in H-EDRM. METHODS: The checklist was developed through an iterative process that leveraged academic literature and expert consultations at different stages of the elaboration process. It was then used to assess primary care facilities in a province in Italy. FINDINGS: The checklist offers a practical instrument for assessing and enhancing PHC disaster preparedness and for improving planning, coordination, and funding allocation. The study identified three critical areas for improvement in the province's PHC disaster preparedness. First, primary care teams should be more interdisciplinary. Second, primary care services should be more thoroughly integrated into the broader health system. Third, there is a notable lack of awareness of H-EDRM principles among PHC professionals. In the future, the checklist can be elaborated into a weighted tool to be more broadly applicable.

Exploring Cascading Disaster Risk During Complex Emergencies: Chemical Industry Disaster Risk Assessment in the Aftermath of the Kakhovka Dam Bombing in Ukraine.

OBJECTIVE: This risk assessment aims to investigate the analysis of cascading disaster risks from the perspective of the chemical industry and public health subsequent to the Kakhovka dam bombing in Ukraine. METHOD: The study utilized a modified observational cross-sectional risk assessment method to assess disaster risk. The method involved identifying the location of chemical factories, determining flooded or at-risk factories, analyzing the type and frequency of chemical hazards, assessing population exposure, and plotting a disaster risk metric. Data on chemical industries and flood extent were collected from open-source secondary data. RESULTS: The destruction of the Kakhovka dam in June 2023 led to severe flooding, placing 42 000 individuals at risk. The analysis identified four chemical factories, with 1 affected by flooding and 3 at risk. The overall risk assessment indicated a high likelihood and severe consequences, including loss of life, environmental contamination, and property damage. CONCLUSION: The combination of complex emergencies and high-risk chemical facilities in Kherson Oblast poses a significant risk of a chemical industry disaster. The interplay between compound and cascading risks during complex emergencies amid the current war further exacerbates the situation, leading to the devastation and destruction of the environment to the detriment of life, and aligns with the characterization of ecocide.

Effectiveness of a Fire Disaster PFA Simulation Game: A Single-Blinded Trial.

OBJECTIVE: As societies become more complex, disasters are increasing in frequency and magnitude. To respond to the psychological problems that may arise in such situations, it is necessary to develop the psychological first aid (PFA) training program that is more engaging for disaster relief workers and less limited in time and space. This study aimed to investigate the effectiveness of a web-based PFA simulation game for disaster relief workers to provide to fire disaster victims. METHODS: This was a non-randomized controlled experimental study with 30 participants in the experimental and control groups. The experimental group learned through the web-based PFA simulation game developed in this study, and the control group was provided with written educational materials regarding general disaster. The effects of time between groups and interaction between groups were tested. RESULTS: Compared to the control group, the experimental group showed significant effects on core competencies in disaster response, self-efficacy, and problem-solving process, and the persistence of the effects was also significantly different. CONCLUSION: The web-based PFA simulation game was found to be effective in improving core competencies in disaster response, self-efficacy, and problem-solving process of disaster relief workers. These results suggest that simulation games can be an effective learning method for learning PFA for disaster relief workers. Since it is difficult to learn through direct participation in disaster situations, a web-based simulation game may be a more effective way to improve and maintain the competence of PFA.