To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
The orientation dynamics of inertialess prolate and oblate spheroidal particles in a directly simulated spanwise-rotating turbulent channel flow has been investigated by means of an Eulerian–Lagrangian point-particle approach. The channel rotation and the particle shape were parameterized using a rotation number Ro and the aspect ratio λ, respectively. Eleven particle shapes 0.05 ≤ λ ≤ 20 and four rotation rates 0 ≤ Ro ≤ 10 have been examined. The spheroidal particles retained their almost isotropic orientation in the core region of the channel, despite the significant mean shear rate set up by the Coriolis force. Irrespective of channel rotation rate Ro, rod-like spheroids tend to align in the streamwise direction, while disk-like particles are oriented in the wall-normal direction. These trends were accentuated with increasing departure from sphericity λ = 1. The changeover from the isotropic orientation mode in the centre to the highly anisotropic near-wall orientation mode commenced further away from the suction-side wall with increasing Ro, whereas the particle orientations on the pressure side of the rotating channel remained essentially unaffected by Ro. We observed that the alignments of the fluid rotation vector with the Lagrangian stretching direction were similarly unaffected by the imposed system rotation, except that the de-alignment set in deeper into the core at high Ro. This contrasts with the well-known substantial impact of system rotation on the velocity and vorticity fields. Similarly, slender rods and flatter disks were aligned with the Lagrangian stretching and compression directions, respectively, for all Ro considered, except in the vicinity of the walls. The typical near-wall de-alignment extended considerably further away from the suction-side wall at high Ro. We conjecture that this phenomenon reflects a change in the relative importance of mean shear and small-scale turbulence caused by the Coriolis force. Preferential particle alignment with Lagrangian stretching and compression directions are known from isotropic and anisotropic turbulence in inertial reference systems. The present results demonstrate the validity of this principle also in a non-inertial system.
We use direct numerical simulations to study convection in rotating Rayleigh–Bénard convection in horizontally confined geometries of a given aspect ratio, with the walls held at fixed temperatures. We show that this arrangement is unconditionally unstable to flow that takes the form of wall-adjacent convection rolls. For wall temperatures close to the temperatures of the upper or lower boundaries, we show that the base state undergoes a Hopf bifurcation to a state comprised of spatiotemporal oscillations – ‘wall modes’ – precessing in a retrograde direction. We study the saturated nonlinear state of these modes, and show that the velocity boundary conditions at the upper and lower boundaries are crucial to the formation and propagation of the wall modes: asymmetric velocity boundary conditions at the upper and lower boundaries can lead to prograde wall modes, while stress-free boundary conditions at both walls can lead to wall modes that have no preferred direction of propagation.
Based on correlational and factorial analysis of data collected from 384 middle and high school students in South Korea, Al–Hoorie et al. (2024) claimed the existence of a discriminant validity crisis within the L2 motivational self-system research tradition and advocated for abandoning research in this area. In this response, we critically examined the evidence presented, re-analyzed their data, and argued that their findings actually support the discriminant validity of the target scales. We also discussed issues related to the design and implementation of their study and refuted their assertion regarding a discriminant validity crisis in this field. Finally, we emphasized the necessity of prioritizing definitional validity in the ongoing methodological reforms of L2 motivation research.
The release of ChatGPT in November 2022 drastically lowered the barrier to artificial intelligence with an intuitive web-based interface to a large language model. This study addressed the research problem: “Can ChatGPT adequately triage simulated disaster patients using the Simple Triage and Rapid Treatment (START) tool?”
Methods
Five trained disaster medicine physicians developed nine prompts. A Python script queried ChatGPT Version 4 with each prompt combined with 391 validated patient vignettes. Ten repetitions of each combination were performed: 35190 simulated triages.
Results
A valid START score was returned In 35102 queries (99.7%). There was considerable variability in the results. Repeatability (use of the same prompt repeatedly) was responsible for 14.0% of overall variation. Reproducibility (use of different prompts) was responsible for 4.1% of overall variation. Accuracy of ChatGPT for START was 61.4% with a 5.0% under-triage rate and a 33.6% over-triage rate. Accuracy varied by prompt between 45.8% and 68.6%.
Conclusions
This study suggests that the current ChatGPT large language model is not sufficient for triage of simulated patients using START due to poor repeatability and accuracy. Medical practitioners should be aware that while ChatGPT can be a valuable tool, it may lack consistency and may provide false information.
The potential for a radiological disaster from natural environmental causes, human error, aging nuclear power plants, buried radioactive waste, regular ground transport of radioactive materials, a shared international border, and the threat of radiological terrorism make the Western New York region vulnerable for a radiation emergency. A global threat from Russia and intentional uses of nuclear weapons by non-state approved users, such as North Korea, raise public awareness. Limited importance has been given to educating medical providers and emergency planners with radiological knowledge and preparation.
Objective
The goal of this study was to understand the relationships of the peerception of risk, emergency self-efficacy and willingness to respond to a radiation emergency among health professionals.
Method
Two hundred sixty-nine (269) medical and health practitioners were selected for a purposive, convenience sample in an eight-county region of Western New York. Participants identified the need for improved knowledge and preparation for the management of a radiation emergency.
Results
Statistical findings using the author created Structural Equation Model (SEM) revealed a goodness of fit for perception of risk as a strong predictor of willingness to respond to a radiation emergency.
Conclusion
The SEM study names the variables that influence training for global nuclear realities.
the line between our physical and digital selves becomes increasingly blurry, sexual, and reproductive data rights must be safeguarded as a key lever of bodily autonomy and gender equality.
Methods
Kati Collective will facilitate an engaging workshop on protecting personal sexual reproductive health data rights and bodily autonomy to build a shared understanding of this critical issue and begin to explore pathways for solutions.
Results
Develop co-created policy-level recommendations and pathways to action contributing to improved understanding, alignment and collaboration among key stakeholders, and improved protection, ownership, governance of SRH data.
Conclusions
There is an urgent need for collective action to co-develop policy-level recommendations and pathways to action to protect SRH rights and bodily autonomy.
Research on the nexus between education and nationalism in the Habsburg Empire has often focused on the role that language may have played in top-down nationalization processes and the popular dissemination of national thought. According to contemporary nationalist logic, undergoing education in a certain language of instruction also entailed the internalization of nationalist values inherent to its corresponding nationalist movement. The present article argues that the Habsburg educational experience was much more contingent, and draws attention to the diversity of pedagogical approaches towards nationalism and nationality that could be encountered in Austrian schools during the last five decades of Habsburg rule. By using examples from German- and Slovene-language textbooks, it shows that sociopolitical, temporal, as well as institutional factors played an important role in determining the practical values and attitudes towards the nationalism that students encountered during their school years. With systematic empirical studies remaining rare, further research will be necessary to gain a fuller insight into the complexities of the Habsburg education system and its potential effects on popular collective identity formation.
The objective of this research is to assess how New York City Health + Hospitals emergency management professionals (EMPs) perceive climate change-related events, to a.) improve communication for increased receptivity and b.) identify gaps in perceived risks.
Methods
The study surveys EMPs from 13 geographically different healthcare facilities in NYC about their perceptions on climate change and its related emergency scenarios, preferred information sources on climate change, and the best modes of communication during climate-related extreme weather events.
Results
The results of this study support a.) the importance of official hospital-system guidance regarding climate risks b.) the use of a diverse array of terminology, including messaging that refrains from the phrase ‘climate change’ and instead refers to the ‘future’ c.) the incorporation of clear actionable deliverables and d.) the inclusion of expert voices into messaging. Overall, recent events and upcoming seasonal hazards appear to affect perception of risk more than objective measures. Knowledge of city and temporal factors that impact perceived risk can be mobilized to harness engagement.
Conclusions
The results of this study inform best practices for climate communications to EMPs, critical in preparing our health systems for future climate disasters.
This article explores the health-related challenges for refugees now residing in the United States and highlights strategies for building resilience in this vulnerable population.
Methods
This is a descriptive study identifying six common challenges refugees face when relocating from their country to another country.
Results
Refugees in the United States face many challenges, including language barriers, access to quality education, discrimination based on cultural and religious differences, and inadequate healthcare access. Child refugees, constituting a significant portion of the refugee population, face distinct challenges compared to adults. Many refugees grapple with psychological trauma and access to proper healthcare.
Conclusion
Refugees face many challenges when transitioning to a new country, including losing community, familial support, safety, and cultural norms. To address these challenges in the United States, advocates, and public health advisors must actively engage with refugees to assess their needs and build resilient communities. Proactive outreach tailored to refugees’ vulnerabilities is crucial to ensuring their well-being and successful integration into their new homes.
This paper reports a replication of part of Tavakoli and Foster’s (2008) investigation into the influence of narrative task design on second language (L2) oral performance. The initial study found in part that narratives with both foreground and background information elicited significantly greater syntactic complexity than those with only foreground information. This close replication adds the variable of literacy, conducting the study with adult refugees to New Zealand with low first language (L1) literacy. Participants narrated two of the four cartoon strips in Tavakoli and Foster (2008). In contrast to the initial study, background information in the narrative tasks had no impact on the syntactic complexity, lexical diversity, or fluency of performances. However, given the tendency of participants to omit background events, this outcome is discussed in terms of visual literacy, and aptness to describe rather than connect the cartoon frames. The implications for the use of narrative tasks with such learners are explored.
The present study aimed to analyze the factors that influence the increase in the desire to re-engage volunteer rescuers and saviors of the Red Crescent Society of the Islamic Republic of Iran.
Methods
This qualitative descriptive phenomenological study involved the participation of volunteers who had not volunteered in the Iranian Red Crescent Society (IRCS) for at least one year but expressed a willingness to be re-engaged. The semi-structured in-depth interview process and data collection continued until the theoretical saturation stage was reached. The collected data was analyzed using the interpretive approach and the 7-step Claesian method.
Results
The results show that several factors influence the increase in the desire to reengage volunteer rescuers and members of IRCS. These factors were categorized into 136 codes, 63 main codes, 20 clusters, 7 classes, and 3 themes, namely “organizational support and understanding,” “work characteristics,” and “organizational credibility.” The results of the study indicate that each of the identified factors plays a significant role in the dynamics of the re-engagement process for rescuers and volunteer rescuers within the IRCS.
Conclusions
The experiences of volunteer rescuers and members can be utilized to enhance the recruitment and retention of volunteer human resources within the IRCS.
While the study of soft power has gained significant scholarly attention, an understanding of soft power politics in diverse state models, and multinational federations specifically, is lacking. This study remedies this gap by exploring the connection between soft power and multinational federalism in the Canadian context, highlighting the tensions between the Canadian federal “majority” nation and Quebec's “minority” nation. Relying on the international education policy sphere and its soft power potential, the study extends the discussion of soft power beyond the typical unitary nation-state lens, elucidating the interaction of multiple (and contrasting) soft power rationales within one country. The study reveals that soft power politics can be exerted as much domestically as externally and can be pursued in a discorded fashion within a nation-state. Clearly, there is a need for a more nuanced understanding of soft power, which considers its contested manifestation, and the context-specific ways it is utilized.
Small island developing states in the Eastern Caribbean face a dual burden of climate-related disasters and noncommunicable diseases (NCDs). While the relationship between disasters and health has been demonstrated for acute emergencies, there is limited understanding of the impacts of repeated disaster exposure on NCD management and control. The Eastern Caribbean Health Outcomes Research Network (ECHORN) leverages its robust community-driven network for data sharing and implementation science related to furthering our understanding of the intersection of disaster exposure and NCDs.
Methods
The ECHORN cohort study is an ongoing longitudinal cohort study characterizing risk and protective factors for NCDs in the Eastern Caribbean. The cohort (N=2,961) was empaneled between 2013-2018 across four sites. Regional partners identified disaster exposure as a priority for research and coordination moving forward.
Results
ECHORN Wave III includes a disaster exposure survey to analyze the impact of exposure to repeated climate events and natural disasters (COVID19, earthquakes) on NCD management in the Eastern Caribbean. This first-of-its-kind study offers a data-driven approach to sustainable NCD management and climate-resilient policy development.
Conclusion
With the anticipated acceleration of NCDs and disasters across the Caribbean, ECHORN’s work to inform disaster-resilient NCD management and control is imperative and time-sensitive.
While previous studies have identified a relationship between dietary intake and the risk of non-alcoholic fatty liver disease (NAFLD), the influence of overall nutritional status on NAFLD development has not been thoroughly investigated. This study sought to explore the association between different nutritional status indicators and NAFLD among the older adults. Nutritional status was evaluated using controlling nutritional status (CONUT), prognostic nutritional index (PNI) and nutritional risk index (GNRI), while NAFLD was identified based on a controlled attenuation parameter ≥ 285 dB/m, measured using transient elastography. The analysis included multivariate regression, receiver operating characteristic analysis, eXtreme Gradient Boosting and subgroup analysis to investigate the relationships between nutritional status indices and NAFLD. The study enrolled 1409 participants for the main analysis, with an NAFLD prevalence of 44·7 %. After accounting for potential confounders, a positive association between PNI and NAFLD was observed. Participants in the third and fourth quartiles of PNI showed increased odds of NAFLD compared with the lowest quartile (Q3: OR = 1·45, 95 % CI (1·03, 2·05); Q4: OR = 2·27, 95 % CI (1·59, 3·24)). Similarly, higher GNRI quartiles were significantly associated with greater odds of NAFLD (Q4 v. Q1: aOR = 1·84; 95 % CI (1·28, 2·65)). Conversely, higher CONUT values were linked to a reduced prevalence of NAFLD (OR = 0·65, 95 % CI (0·48, 0·87)). This study highlights that suboptimal nutritional status, indicating overnutrition as evaluated by PNI, GNRI and CONUT, is positively linked with the risk of NAFLD in individuals aged 50 years and above.
Northern British Columbia, Canada, is an undersurveyed region for aquatic macroinvertebrates. We surveyed the Stellako River, a culturally and economically important river in the region, for adult caddisflies using Malaise traps, then identified species by using DNA barcoding, which revealed the presence of Protoptila coloma Ross (Trichoptera: Glossosomatidae). This is the first record of this species in Canada; it represents a 680-km northwards expansion of the species’ currently known range.
The high-altitude balloon proposed in this paper is a long-life balloon carrying a payload through a cable that flies at 20km altitude in near space. A dynamic model of the system, including the thermodynamics of the buoyancy body coupled with a hanging model of the pod, is developed using the Newton–Euler method. The buoyancy body consists of a helium balloon and a ballonet. A differential pressure difference-based altitude adjustment is achieved by tracking the pressure difference at the target altitude. A dynamic simulation of the buoyancy body with a slung pod in autonomous vertical takeoff and altitude regulation processes is presented. The internal thermodynamic variations and pressure differential of the buoyancy body are given. The air mass exchange and blower flow control of the ballonet are validated. The altitude holding error is analysed. The maximum pull force that the cable can withstand is calculated, and the maximum attitude angles of the pod during the ascending and descending processes are depicted. Simulation results provide basic knowledge for the structural design and payload installation of pods.
In a model of military-civilian trauma system integration, coordination of mass casualty incident response by military and civilian entities could be more effective through reduced duplication of services and improved resource utilization. The following study seeks to examine and address the challenges faced in establishing integrated trauma systems.
Methods
Through a survey this study comprehensively gathered data on trauma system capabilities and the current degree of military-civilian integration of 73 individual countries. Through a scoring method based on participant responses, countries were classified into three distinct integration types, ranging from minimal (Type I) to robust (Type III). This method allowed analysis of the association of numerous trauma system factors with increased integration status.
Results
A higher integration status is associated with coordinated use of military and civilian resources for aero-medical evacuation (Chi Square p<0.05). With regards to resource utilization, countries with higher integration status exhibited more rapid availability of blood products (Chi Square p<0.05), a critical factor contributing to improved mortality among traumatically injured patients.
Conclusion
By identifying key areas where integration can be strengthened, and by understanding the underlying factors shaping these frameworks, this research seeks to build more collaborative and resource-efficient responses to mass casualty incidents globally.
Mass casualty incidents (MCIs) come unannounced, mandating the immediate shift from the daily routine to crisis mode through the implementation of an MCI response plan (plan). On August 4, 2020, a massive explosion devastated the Lebanese capital, Beirut, causing 8643 injuries and 200 deaths.1 The private Lebanese American University Medical Center in Beirut has an an estimated 10,000 emergency department (ED) visits per year. The purpose of this study is to analyse the plan of this private hospital in a low resource country in response to a blast MCI.
Methods
A retrospective analysis of the expected outcome of the pre-existing plan was performed.
Results
Major flaws were noted. Triage was impossible using the START method and will be done outside the ED dividing patients into walking and non-walking. Identification and registration of patients was impossible. Patients will be assigned a number and be registered later. Colored jackets were created to recognize response team members for better organization.t Radiologic imaging will be ordered only when they change the patients’ disposition.
Conclusion
This analysis showed failure of the plan at different levels and adjustments were made to advance the plan. Periodic exercises and annual review are needed for continuous improvement.