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Limited access to health services and overwhelmed healthcare systems created a challenging environment for those in need of mental health support during the COVID-19 pandemic, and the pandemic impacted suicide risk in several ways.
Aims
The present study aimed to analyse how the quality of the health security systems in 12 countries affected suicide crisis syndrome (SCS) during the pandemic. We hypothesised that countries with robust health systems were better able to respond to the increased demand for (mental) health support, resulting in fewer cases of SCS.
Method
From June 2020 to September 2021, 11 848 participants from 12 different countries took part in an online survey. Besides asking about sociodemographic information, the survey assessed the severity of SCS with the Suicide Crisis Inventory (SCI). The Global Health Security Index and the Legatum Prosperity Health Index were used to operationalise the quality of the national health systems. Multilevel analyses were performed to evaluate the impact of health system quality and COVID-19-associated factors on SCI scores.
Results
SCS was more prevalent among participants with COVID-19 symptoms and in countries with high rates of COVID-19-associated deaths. Multilevel analyses revealed a significant interaction effect of COVID-19 symptoms and national health indices. SCS occurred significantly less frequently in participants with COVID-19 symptoms living in countries with good health security systems.
Conclusions
The challenges posed by the pandemic highlight the necessity to promote accessible and affordable health services to mitigate the negative impact of the pandemic on suicidal ideation and behaviour.
This article examines India’s energy transition agenda, which the central government drives to reduce the impact of climate change through the development of renewable energy. It presents a case study of the ‘Oran Land’ in the Thar desert in India, which is affected by the country’s energy transition agenda. It further highlights issues relating to human rights infringement linked to corporations undertaking the transition and operating in the ‘Orans’—a community-protected land. The article concludes with discussions on legislative developments in India and global best practices that seek to mainstream human rights into business practice and further strengthen compliance with the United Nations Guiding Principles on Business and Human Rights.
Towards the end of his book, African Philosophical Adventures, John Murungi laments the injurious impact of Western epistemological hegemony on the humanity and well-being of non-Western peoples and societies, especially Africans. He describes the ensuing situation as a crisis about what it means to be called human or to have the right to exist as human in the twenty-first century: Today, human rights are in a state of crisis and this crisis is fundamentally the crisis of being human. … [The] planetary mode of being has fallen under the tyrannical regime of Euro-Western anthropology. The voice of African anthropology, as is the case with other non-Euro-Western voices of anthropology, remains muted. Africans, particularly, have been reduced to beggars in matters of hermeneutics and understanding of being human. They have been compelled and are even today compelled to look up to Euro-West for assistance in self-understanding. In matters that pertain to self-understanding they look for foreign aid. …Having been voided of what they [Africans] are and of the ability for self-understanding they are compelled to look outside themselves to make sense of themselves. (142–43)
Sedimenting flows occur in a range of society-critical systems, such as circulating fluidised bed reactors and pyroclastic density currents (PDCs), the most hazardous volcanic process. In these systems, mass loading is sufficiently high ($\gg \mathcal {O}(1)$) and momentum coupling between the phases gives rise to mesoscale behaviour, such as formation of coherent structures capable of generating and sustaining turbulence in the carrier phase and directly impacting large-scale quantities of interest, such as settling time. While contemporary work has explored the physical processes underpinning these multiphase phenomena for monodispersed particles, polydispersed behaviour has been largely understudied. Since all real-world flows are polydisperse, understanding the role of polydispersity in gas–solid systems is critical for informing closures that are accurate and robust. This work characterises the sedimentation behaviour of two polydispersed gas–solid flows, with properties of the particles sampled from historical PDC ejecta. Highly resolved data at two volume fractions (1 % and 10 %) are collected using an EulerLagrange framework and is compared with monodisperse configurations of particles with diameters equivalent to the arithmetic mean of the polydisperse configurations. From these data, we find that polydispersity has an important impact on cluster formation and structure and that this is most pronounced for dilute flows. At higher volume fraction, the effect of polydispersity is reduced. We also propose a new metric for predicting the degree of clustering, termed ‘surface loading’, and a model for the coefficient of drag that accurately captures the settling velocity observed in the high-fidelity data.
This paper seeks to understand He Xinyin’s reassessment of the notion of friendship and its subversive dimension in several of his major essays. This reassessment was part of an increase in discourses on friendship in China in the 16th-17th centuries, which was in some ways prompted by the decay of traditional structures, particularly the family structure, that served as the basis for the social functioning of the empire. He Xinyin was one of the most innovative and radical thinkers whose redefinition allowed friendship to take, for the first time, a foremost place among the five social relations, to be conceived as a subjective relationship where the individual emerges as a primary entity, and to form the ground of two major freedoms, the freedom of expression and the freedom of association.
Experiments are conducted over smooth and rough walls to explore the influence of pressure-gradient histories on skin friction and mean flow of turbulent boundary layers. Different pressure-gradient histories are imposed on the boundary layer through an aerofoil mounted in the free stream. Hot-wire measurements are taken at different free-stream velocities downstream of the aerofoil where the flow has locally recovered to zero pressure gradient but retains the history effects. Direct skin friction measurements are also made using oil film interferometry for smooth walls and a floating-element drag balance for rough walls. The friction Reynolds number, $Re_\tau$, varies between $3000$ and $27\,000$, depending both on the surface conditions and the free-stream velocity ensuring sufficient scale separation. Results align with previous findings, showing that adverse pressure gradients just upstream of the measurement location increase wake strength and reduce the local skin friction while favourable pressure gradients suppress the wake and increase skin friction. The roughness length scale, $y_0$, remains constant across different pressure-gradient histories for rough wall boundary layers. Inspired by previous works, a new correlation is proposed to infer skin friction based on the mean flow. The difference in skin friction by matching the turbulence profiles and flow structure between an arbitrary pressure-gradient history and zero pressure-gradient condition can be predicted using only the local wake strength parameter ($\Pi$), and the variations in wake strength for different histories are related to a weighted integral of the pressure-gradient history normalised by local quantities. This allows us to develop a general correlation that can be used to infer skin friction for turbulent boundary layers experiencing arbitrary pressure-gradient histories.
“My first contact with Rod Feldmann was his voicemail message: ‘An incredible set of circumstances makes it impossible for me to come to the phone right now. Please leave a message and I will get back to you as soon as possible.’ I was considering coming to Kent for graduate school and I thought, ‘Wow, this guy is either really important or really arrogant.’ I was right and wrong. He was never arrogant, but always important, and eventually of utmost importance to me.
The Paris Agreement’s commitment to achieve net-zero greenhouse gas emissions by 2050 has resulted in an uptick in environmental laws and regulations. However, such state conduct could implicate other legal obligations and norms, including international investment law and international human rights law. The conversation about human rights, net-zero and investment treaties, including arbitration cases and arbitral awards under the treaties, is in its relative infancy. This article examines how investment treaties are equipped to reconcile relevant norms with a particular focus on corporate codes and policies that pronounce broad commitments to protecting human rights and the environment. It establishes certain principles to guide parties and arbitral tribunals as to the codes while recognizing the inevitable challenges they will face.
Brain Health Services are second-generation memory clinics that aim to reduce the risk of progression to dementia in at-risk individuals. We describe the rationale for such a service, and comment on its novel implementation by Venkataraman and colleagues that integrates digital technologies and biomarker testing. We describe the advantages and possible limitations of such an approach, then investigate areas for further work – namely, the need to account for multiple pathologies in biomarker testing and to formulate standards for genetic counselling.
Reflecting on the civil claim filed in France under the French Duty of Vigilance law (LdV) by members of the Union Hidalgo community in Mexico against the energy company Electricité de France (EDF), this article explores interactions between human rights due diligence in renewable energy projects. The lawsuit is one of the first cases brought under the LdV, and the first case claiming violations of Indigenous rights. The rights violations experienced by the community—the lack of free, prior and informed consent and violence against human rights defenders—epitomize the reality of harmful corporate tactics in the energy and extractive industries. Whereas the LdV enshrines a process through which communities affected by harmful corporate practices can access transnational legal avenues for redress, inconsistencies and ambiguities within the law call into question its ability to effectively regulate the human rights activities of French corporations involved in renewable energy projects.
This paper addresses the links between alchemy, mining and religion in the early modern alchemical iconography of the German mining theorist Martin Sturtz. He created a special version of the prayer Vaterunser (Our Father) for miners and metallurgists and used the images from Christian and alchemical iconography to demonstrate the history of the creation of metals and how they grow inside the Earth. In one of his images, the Saviour is crucified against the background of coloured strips or stripes, symbolizing the seven metals inside a sedimentary complex. In another miniature, the blood spilling from his wound gives rise to ore veins in which metals ripen. These and the other iconographical and textual examples from Sturtz’s treatises show the attempt to connect the mining process with alchemical theory and Christian religion. This paper will shed light on the origins of this unusual alchemical imagery and its connection with other alchemical and theological works, especially those by Paul Lautensack.
The scramble to extract critical energy transition minerals creates risk of widespread negative human rights impacts. A just transition in the extraction of critical minerals must involve deep examination of the mine-community interface to gain a better understanding of the drivers of successful engagement between mining companies and communities. Drawing on fieldwork in South America’s lithium triangle, this paper finds that the nature of the corporate-community relationship is increasingly key to enabling a just transition whereby communities participate in the benefits of extraction with negative impacts mitigated. It establishes that key success factors are related to empowerment of Indigenous communities and have the potential to maximise positive outcomes for communities in the context of lithium extraction. Governments and companies must embed a more bottom-up process with an end goal of communities themselves defining the parameters of what a just transition means in the critical minerals context.
In this paper, we discuss the transport of sediment and the formation of bedforms in turbulent river flows, under flow conditions typical of flooding events. Through the implementation of an immersed boundary method, a wall model and a morphological model, we were able to simulate complex and mobile geometries under high Reynolds numbers at an affordable computational cost. In particular, we examined the evolution of bedforms on a loose sediment bed under turbulent flow conditions, using input parameters obtained from laboratory measurements. Over time, the bedforms become more three-dimensional and irregular in shape, leading to changes in the shear layer, crest angle and separation patterns. The bedforms continue to evolve until a quasi-steady equilibrium is reached. Our simulations highlight the crucial role played by the small-scale bedforms, which significantly affect the flow dynamics: an increase in the total drag is observed, related to the form drag generated by the local recirculation and the increased size of the large-scale recirculation bubble. Furthermore, a stronger turbulent activity ensues from the shear layers forming on the crests of the small-scale bedforms. Finally, a wider shedding angle of the shear layer is caused by the irregular crest line.
Motivated by microfluidic applications, we investigate drag reduction in laminar pressure-driven flows in channels with streamwise-periodic superhydrophobic surfaces (SHSs) contaminated with soluble surfactant. We develop a model in the long-wave and weak-diffusion limit, where the streamwise SHS period is large compared with the channel height and the Péclet number is large. Using asymptotic and numerical techniques, we determine the influence of surfactant on drag reduction in terms of the relative strength of advection, diffusion, Marangoni effects and bulk–surface exchange. In scenarios with strong exchange, the drag reduction exhibits a complex dependence on the thickness of the bulk-concentration boundary layer and surfactant strength. Strong Marangoni effects immobilise the interface through a linear surfactant distribution, whereas weak Marangoni effects yield a quasi-stagnant cap. The quasi-stagnant cap has an intricate structure with an upstream slip region, followed by intermediate inner regions and a quasi-stagnant region that is mediated by weak bulk diffusion. The quasi-stagnant region differs from the immobile region of a classical stagnant cap, observed for instance in surfactant-laden air bubbles in water, by displaying weak slip. As exchange weakens, the bulk and interface decouple: the surfactant distribution is linear when the surfactant is strong, whilst it forms a classical stagnant cap when the surfactant is weak. The asymptotic solutions offer closed-form predictions of drag reduction across much of the parameter space, providing practical utility and enhancing understanding of surfactant dynamics in flows over SHSs.
Carbon storage in saline aquifers is a prominent geological method for reducing CO2 emissions. However, salt precipitation within these aquifers can significantly impede CO2 injection efficiency. This study examines the mechanisms of salt precipitation during CO2 injection into fractured matrices using pore-scale numerical simulations informed by microfluidic experiments. The analysis of varying initial salt concentrations and injection rates revealed three distinct precipitation patterns, namely displacement, breakthrough and sealing, which were systematically mapped onto regime diagrams. These patterns arise from the interplay between dewetting and precipitation rates. An increase in reservoir porosity caused a shift in the precipitation pattern from sealing to displacement. By incorporating pore structure geometry parameters, the regime diagrams were adapted to account for varying reservoir porosities. In hydrophobic reservoirs, the precipitation pattern tended to favour displacement, as salt accumulation occurred more in larger pores than in pore throats, thereby reducing the risk of clogging. The numerical results demonstrated that increasing the gas injection rate or reducing the initial salt concentration significantly enhanced CO2 injection performance. Furthermore, identifying reservoirs with high hydrophobicity or large porosity is essential for optimising CO2 injection processes.
This article examines the concept of just energy transition in the context of Africa. It explores two key imperatives: (1) social inclusion and (2) an environmental rights-based approach to promote just energy transitions within African countries. The article looks at social inclusion from the perspective of local communities that host energy infrastructures, highlighting potential injustices and negative impacts that may arise from the energy transition. It further argues that social inclusion and environmental rights-based approaches can be useful tools for achieving just energy transitions in Africa. The article also analyses strategies that underpin social inclusion and environmental rights-based approaches within the governance and legal frameworks for energy transition projects in Africa, including empowering local communities to ensure the transition aligns with their socio-economic standing. The article suggests that adopting socially inclusive and environmental rights-based imperatives are significant steps towards overcoming and addressing injustices in energy transition projects in Africa.
African countries have increasingly emphasized adopting lower carbon, more efficient and environmentally responsible energy systems. Despite these efforts, little progress has been made in addressing the adverse human rights impacts of energy transition programs and projects, and the responsibilities of extractive sector corporations and operators. Existing legal and institutional frameworks supporting human rights face hindrances in adapting to local contexts to pursue clean energy transition and energy justice. Through the lens of community engagement, gender equality and other rights-based approaches, this article argues that socially excluding vulnerable groups in accessing energy markets is primarily a function of consolidating energy delivery in a way that navigates current discrimination and responds to the central roles played by different actors. The article explores how energy is produced, extracted, distributed and shared to help outline a future agenda for shaping discussions on just transitions in Africa, emphasizing the prioritization of fairness in these efforts.