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.
This article explores the geographical imagination of diasporic activists from Afghanistan. It examines the significance of the historic-geographic region of Khorasan for their attempts to re-imagine Afghanistan and its place in the region and wider world. The article documents ethnographically the forms of intellectual exchange in which these intellectual-activists participate, and their modes of materializing the geographical imagination of Khorasan in everyday life. Rather than analyzing their geographical imagination solely through the lens of ethnicity, it treats it as reflecting the activists’ underlying yearning for sovereign agency and as an attempt to forge politically recognizable subjects capable of action.
This article offers a nuanced examination of the complex identity dynamics among the Christian and Muslim communities in Cyprus during the late 19th and early 20th century, particularly in the aftermath of British administration replacing Ottoman rule in 1878. The article draws attention to the profound impact of this historical transition on the identity formation processes of both communities. Despite the shared wartime experience of the First World War, the Christian and Muslim communities in Cyprus failed to construct a cohesive identity rooted in their common geographical space. Drawing on Zygmunt Bauman’s concept of ambivalence, the article explores the complex process by which Cypriot communities sought to align their identity with larger nations, namely Greece and Turkey, rather than grounding it in their local context. The article contends that the genesis of their ambivalence can be traced back to 1878 when British administration replaced Ottoman rule on the island.
Defining the role of federal wildland firefighters (WFF) in the context of emergency medical services (EMS) is a gap in the literature. Our work highlights the importance of standardizing and enhancing the EMS capabilities of federal WFF for their own occupational safety and well-being, while emphasizing their potential for responding to all disasters and providing medical safety net in rural communities.
Methods
A comprehensive academic literature review on the topic returned one non-peer reviewed manuscript. Study members analyzed National Wildfire Coordinating Group (NWCG) EMS policy to assess current EMS standards within the WFF service.
Results
The study reveals a lack of standardized, comprehensive support for EMS capabilities among federal WFF, despite need for their expertise in wide-ranging emergency situations. There are few incentives for individuals to obtain and maintain EMS certification. Various innovations, such as the Alaska Fire Medic Program and the BLM Operational Medical Support Program, are potential models for improving EMS across the entire NWCG.
Conclusions
To enhance the safety, professionalization, and efficiency of WFF, the NWCG should consider standardizing EMS guidelines, especially in providing consistent support for medical certifications. EMS certified WFF could contribute to nationwide disaster response capabilities if supported by NWCG.
This article examines Putin’s expectations prior to Russia’s full-scale invasion of Ukraine and seeks to answer the following question: Why did Russia invade Ukraine regardless of the West’s threats of severe economic penalties raising the cost of an attack? I argue that the confidence in Vladimir Putin to invade Ukraine, despite his awareness that the stakes could go well beyond the borders of Ukraine and increase the cost of war for the Kremlin, was based on Putin’s calculations that the West would be reluctant to change or substantially displace established rich-get-richer economic structures and would not apply high costs on the Kremlin for military aggression against Ukraine in case of a successful blitzkrieg campaign. By utilizing an extended deterrence game analysis, the article demonstrates how Russia, Ukraine, and the West interacted in decision-making, taking into account the reactions and choices of the other players, and adds to the current body of knowledge by introducing an expanded approach to deterrence strategy based on economic interdependence and the scale of the anticipated conflict.
Regular reflection (RR) to Mach reflection (MR) transitions (${\rm RR}\leftrightarrow {\rm MR}$) on long wedges in steady supersonic flows have been well studied and documented. However, in a short wedge where the wedge length is small, the transition prediction becomes really challenging owing to the interaction of the expansion fan emanating from the trailing edge of the wedge with the incident shock and the triple/reflection point. The extent of this interaction depends on the distance between the wedge trailing edge and the symmetry line (Ht). This distance is a geometric combination of the distance of the wedge leading edge from the symmetry line $(H)$, the wedge angle ($\theta$) and the wedge length $(w)$. In the present study, we used the method of characteristics to model the complete wave interactions which accurately predicted shock curvatures and the reflection configurations for all ranges of the incoming flow Mach number. In the case of short wedges, the transition criterion strongly depends on the wedge length, which can be so adjusted even to eliminate the ${\rm RR}\rightarrow {\rm MR}$ transitions till the wedge angle reaches the no-reflection domain. Transition lines for both the detachment criterion and von Neumann criterion are also drawn to investigate the dual solution domain, and the reflection configurations were verified experimentally for the first time on short wedges. By using proper input configuration parameter ($w/H$), various types of shifts in the dual solution domain for short wedges are studied and categorised into three types, namely Type I, Type II and Type III.
In the present study, we have discovered and identified a new crystalline form of pinaverium bromide, pinaverium bromide dihydrate (C26H41BrNO4⋅Br⋅2H2O), whose single crystals can be obtained by recrystallization from a mixture of water and acetonitrile at room temperature. The obtained crystals were characterized by X-ray single-crystal diffraction, and their crystal structure was also solved based on X-ray single-crystal diffraction data. The results show that the final pinaverium bromide dihydrate model contains an asymmetric unit of one pinaverium bromide (C26H41Br2NO4) molecule and two water molecules that combine with the bromine ion through O–H⋯O and O–H⋯Br hydrogen bonds. Then, the adjacent pinaverium bromide dihydrates are linked by O–H⋯O, O–H⋯Br, and C–H⋯O hydrogen bonds. On the other hand, the experimentally obtained X-ray powder diffraction pattern is in good agreement with the simulated diffraction pattern from their single-crystal data, confirming the correctness of the crystal structure. Hirshfeld surface analysis was employed to understand and visualize the packing patterns, indicating that the H⋯H interaction is the main acting force in the crystal stacking of pinaverium bromide dihydrate.
Focusing on the first decades of the twentieth century but acknowledging longer-term patterns of circulation, this paper discusses how cattle, historically occupying important meanings and roles in the lives of African agropastoralists, was commodified and marketed in southern Mozambique just as Lourenço Marques became the new capital of Mozambique. Highlighting the relations that consolidated between the capital and surrounding cattle-rich areas in a period marked by cattle disease but also the First World War and the Great Depression, the paper looks at the role of different agents and bodies involved in the emerging beef market. Ultimately, the paper shows how African agropastoralists, the main cattle producers in the region, resisted these conditions and tried to engage with markets on their own terms, even in the face of their dwindling control over the different factors that influenced the size and quality of their herds.
Christians talk a lot about humility. They also talk a lot about the kinds of radical faith that seem to fly in the face of intellectual humility. I explore how best to resolve this tension, from a Christian perspective. I argue that rather than prohibiting radical, ‘all-in’ faith or giving up on an intellectual humility requirement, Christians should conceive of intellectual humility as rooted in (non-)concern for one’s intellectual ego. This kind of intellectual humility is compatible with radical faith, but it also suggests a critique of some actual, ego-driven faith commitments.
In this paper, we investigate a sink-driven three-layer flow in a radial Hele-Shaw cell. The three fluids are of different viscosities, with one fluid occupying an annulus-like domain, forming two interfaces with the other two fluids. Using a boundary integral method and a semi-implicit time stepping scheme, we alleviate the numerical stiffness in updating the interfaces and achieve spectral accuracy in space. The interaction between the two interfaces introduces novel dynamics leading to rich pattern formation phenomena, manifested by two typical events: either one of the two interfaces reaches the sink faster than the other (forming cusp-like morphology), or they come very close to each other (suggesting a possibility of interface merging). In particular, the inner interface can be wrapped by the other to have both scenarios. We find that multiple parameters contribute to the dynamics, including the width of the annular region, the location of the sink, and the mobilities of the fluids.
Domestic and International Disaster Response requires ongoing preparedness through full-scale exercises and training. The Humanitarian Response Intensive Course (HRIC) includes a 3-day in-person simulation to prepare future humanitarian workers. The Massachusetts General Hospital (MGH) Disaster Medical and Global Disaster Response Teams supported the HRIC through the development of a simulated field hospital for the course participants. Additionally, the MGH teams engaged in an intensive continuing education program for specialized training.
Methods
An interdisciplinary team developed and delivered seven discrete educational modules utilizing small group methodologies and combining didactics and simulation for a total of 14 hours of content over the 3-day course. Participants engaged in structured debriefing and completed written evaluations at the end of each day.
Results
18 participants completed the course and simulation weekend. Participants strongly agreed that learning outcomes were met and they noted that they felt more prepared to deploy in the future with comments specifically noting the ability to function as part of a team and increased awareness of personal safety in an alternate care setting.
Conclusion
Structured learning within a large-scale immersive, interdisciplinary simulation resulted in participants reporting increased preparation for real-world events.
Direct numerical simulations of oscillatory flow over a bed made of ripples have been performed. Two oscillatory flow forcing mechanisms have been compared: (i) a sinusoidal external pressure gradient (pressure-driven flow); and (ii) a sinusoidal velocity boundary conditions on the rippled bed (shear-driven flow). In the second case, the oscillations of the bed are such that when observed from a reference frame fixed with the bed, the free stream follows the same harmonic oscillation as in the pressure-driven case. While the outer layers have the same dynamics in the two cases, close to the bed differences are observed during the cycle, mostly because the large form drag across the ripples cannot be reproduced in the shear-driven case. A comparison against experimental data from an oscillating tray apparatus provides a relatively good agreement for the phase-averaged flow when the same forcing is considered (i.e. a shear-driven flow). The pressure-driven case has a comparable error to the shear-driven numerical results over the crest of the ripples, whereas the discrepancy is larger at the troughs. The discrepancies between the two cases are more limited for time-averaged flow quantities, such as the mean flow pattern and the time-averaged Reynolds stress distribution. This suggests that numerical or experimental shear-driven configurations may capture well the net effects of coastal transport processes (which occur in pressure-driven oscillatory flow), but care should be exercised in interpreting phase-dependent dynamics near the troughs. More work is needed to fully assess the sensitivity to the forcing mechanisms in different flow regimes.
Virtual reality (VR) technology is perfect with the help of pc, laptop and virtual world integration awareness. The current analysis argues on the application of VR technology inclinic, especially in medical training, panic controlling, any phobia like eating, flying, height phobia etc. therapeutic cure of mental disorder. This research gives a short survey in the field of VR, emphasizing application fields, technological necessities, and present solutions. This research offers the first signal toward the incoming hypnotic virtual atmosphere can be help like a powerful tool, no pharmacologic pain killer. With the use of VR environment, they distract them from pain during panic medication, like chemotherapy, burn medication is so much panic treatment when sterile gauze dressing change we need to distract the attention of patient. These initial conclusions recommended that immersive Virtual Reality more care as a potentially feasible form of therapy forcritical pain. Flying phobia is extremely prevailing nervousness illness, which causes patients suffering and lifeinterfering. VR provide effectiveness treatment of flying phobia, small animal phobia, Claustrophobia etc. By distracting the attention from actual world. Virtual Reality experience treatment is compared by “Imagine experience treatment” (i.e. virtual reality experience treatment completes by imagination). Aim of this paper recourses documentation process, lecturer interview and mathematical measurements to research the use of VR technology scientific development in virtual reality technology. Our present conclusion shows how intellectual factors essential in operator can impact the feature of the human-computer interface (using VR). Therapy authorizations reduced individuals to discover worlds not otherwise accessible to them, permits exact valuation and treatment for their injury and helps their serious requirements in community or personal. And to help these progressive technologies, the operation theater and hospital of the future will be first designed and verified in virtual reality, connecting the full power of the virtual medical doctor. In almost every field we can treat with Virtual Reality simulators, investigators have attained at the same result that both specialists and sufferer gain advantage from this technology. Furthermore, benefits the utilization of Virtual Reality technology in every field were review. Virtual reality is use to distract the attention.
This study aims to quantify how turbulence in a channel flow mixes momentum in the mean sense. We applied the macroscopic forcing method (Mani & Park, Phys. Rev. Fluids, 2021, 054607) to direct numerical simulation (DNS) of a turbulent channel flow at $Re_\tau =180$ using two different forcing strategies that are designed to separately assess the anisotropy and non-locality of momentum mixing. In the first strategy, the leading term of the Kramers–Moyal expansion of the eddy viscosity is quantified, revealing all 81 tensorial coefficients that essentially characterise the local-limit eddy viscosity. The results indicate the following: (1) the eddy viscosity has significant anisotropy, (2) Reynolds stresses are generated by both the mean strain rate and mean rotation rate tensors associated with the momentum field and (3) the local-limit eddy viscosity generates asymmetric Reynolds stress tensors. In the second strategy, the eddy viscosity is quantified as an integration kernel revealing the non-local influence of the mean momentum gradient at each wall-normal coordinate on all nine components of the Reynolds stresses over the channel width. Our results indicate that while the shear component of the Reynolds stress is reasonably reproduced by the local mean gradients, other components of the Reynolds stress are highly non-local. These results provide an understanding of anisotropy and non-locality requirements for closure modelling of momentum transport in attached wall-bounded turbulent flows.
Qualitative research methods, defined as the collection and analysis of non-numerical data to understand concepts and experiences, are often used to inform mental health practice and policies. When utilising qualitative research methods, it is important that the researcher uses an explicit theoretical framework to guide the study. A theoretical framework informs how researchers engage with a topic or problem, report on their work with participants, describe key concepts and address assumptions within the research questions and procedures. In this article, we describe the basic concepts underpinning three of the most commonly used frameworks in mental health research: positivism, interpretivism and critical realism. We also describe how these theoretical frameworks may guide the qualitative process, including the theoretical and methodological approaches chosen and the ways in which these theoretical frameworks can be applied in practice. To enhance understanding of these frameworks, we include examples of how such frameworks can be used in qualitative mental health research.
Prompt safety confirmations before and after a disaster are key to reducing risks in disasters among older adults. This study aims to reveal issues in contacting fragile older adults once flood disaster strikes to ensure a sustainable safety net.
Methods
Focus group interviews were conducted in three municipalities of Kumamoto, Japan, which experienced a flood disaster in July 2020, with nine care managers, nurses, and center directors of community-based integrated support centers in August 2023.
Results
Communication records of support and lists of older adults requiring support in regular operations were useful, and the safety of those on the lists was first confirmed immediately after the disaster struck. However, confirmation of safety of those who did not rely regularly on public services, those who lived alone, and older couples, was delayed and their safety was determined by their neighbors’ reports.
Conclusions
Prompt safety confirmation system in the event of a disaster is required for, in particular, fragile older adults who do not rely on public services, which lead to early support intervention.
This study aimed to use artificial intelligence (AI) computing techniques to determine if they can validate the findings of a previously published thematic analysis article focusing on disaster medicine experts’ open-ended feedback about Middle East and North African countries (MENA) for chemical, biological, radiological, and nuclear (CBRN) threats.
Methods
Automated text analytics techniques were employed to explore and visualize the semantic essence of the experts’ feedback through word vector transformation and Principal Component Analysis (PCA) for dimensionality reduction. The t-distributed Stochastic Neighbor Embedding (t-SNE) is another more advanced dimensionality reduction technique that enhanced the capturing of the determined components.
Results
Two prominent clusters emerged from the full textual data set representing word similarities groups in the original data set, denoting a thematic group of ideas that experts have emphasized in their responses. Upon deep reading the text feedback, the themes linked preparedness with different training types, such as tabletop exercises and policies/legislation. The findings are in line with currently adopted practices.
Conclusions
While AI methods demonstrated their valuable application in disaster medicine and helped validate the experts’ recommendations objectively, they should be approached cautiously, as they can be complex and challenging to comprehend fully.
We examine the fluid flow forced by precession of a rotating cylindrical container using numerical simulations and experimental flow measurements with ultrasonic Doppler velocimetry. The analysis is based on the decomposition of the flow field into contributions with distinct azimuthal symmetry or analytically known inertial modes and the corresponding calculation of their amplitudes. We show that the predominant fraction of the kinetic energy of the precession-driven fluid flow is contained only within a few large-scale modes. The most striking observation shown by simulations and experiments is the transition from a flow dominated by large-scale structures to a more turbulent behaviour with the small-scale fluctuations becoming increasingly important. At a fixed rotation frequency (parametrized by the Reynolds number, $Re$) this transition occurs when a critical precession ratio is exceeded and consists of a two-stage collapse of the directly driven flow going along with a massive modification of the azimuthal circulation (the zonal flow) and the appearance of an axisymmetric double-roll mode limited to a narrow range of precession ratios. A similar behaviour is found in experiments which make it possible to follow the transition up to Reynolds numbers of $Re\approx 2\times 10^6$. We find that the critical precession ratio decreases with rotation, initially showing a particular scaling ${\propto }Re^{-({1}/{5})}$ but developing an asymptotic behaviour for $Re\gtrsim 10^5$ which might be explained by the onset of turbulence in boundary layers.