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 stress tensor is calculated for dilute active suspensions composed of colloidal Janus particles propelled by self-diffusiophoresis and powered by a chemical reaction. The Janus particles are assumed to be spherical and made of catalytic and non-catalytic hemispheres. The reaction taking place on the catalytic part of each Janus particle generates local molecular concentration gradients at the surface of the particle and, thus, an interfacial velocity slippage between the fluid and the particle, which is the propulsion mechanism of self-diffusiophoresis. In the dilute-system limit, the contributions of the suspended particles to the stress tensor are calculated by solving the linearised chemohydrodynamic equations for the fluid velocity and the molecular concentrations around every Janus particle considered as isolated and far apart from each other. The results are the following. First, the well-known Einstein formula for the effective shear viscosity of colloidal suspensions is recovered, including the effect of a possible uniform Navier slip length. Next, two further contributions are obtained, which depend on the molecular concentrations of the fuel and product species of the reaction, on the concentration gradients, and on the orientation of the Janus particles. The second contribution is caused by simple diffusiophoresis, which already exists in passive suspensions with global concentration gradients and no reaction. The third contribution is due to the self-diffusiophoresis generated by the chemical reaction, which arises in active suspensions. The calculation gives quantitative predictions based on the geometry of the Janus particles and on the constitutive properties of the fluid and the fluid–solid interfaces.
With sustained house price inflation in recent decades undermining the capacities of many younger people to form independent households, intergenerational relations have intensified, with increasing pressure on parents to assist their offspring, especially in supporting homebuying. This paper examines realignment between generations around transfers and the role of housing systems, policies and practices therein. Whilst recent research emphasises the experiences of young receivers, this paper addresses the impact on, and roles of, parent givers. We focus on Hong Kong as a remarkably tight housing market with high concentrations of older-cohorts in both homeownership and public rental housing, as well as very limited housing access for younger-cohorts. Our analysis builds on a quantitative survey of 1,012 parents co-residing with adult-children (aged 25–35 years), complemented by qualitative interviews with a small sub-sample of respondents. Our findings not only demonstrate the impact of intergenerational housing inequalities on family practices, but also how housing, welfare and policy transformations are shaping both intergenerational responsibilities and expectations of government.
Political instability, socio-economic challenges and ongoing conflict hinder effective conservation and monitoring efforts within Lebanon’s nature reserves (NRs) and thus threaten the country’s biodiversity. The first nationwide NR mammal survey in 2023–2024 employed camera traps and line transect sampling to assess species presence and evaluate the effects of habitat diversity and human disturbance on mammal richness. We confirmed the presence of 16 terrestrial mammal species, and species richness varied considerably across sites, with the greatest diversity found in large, ecologically heterogeneous NRs such as Shouf Cedar and Horsh Ehden. Although not statistically significant, habitat diversity was the strongest positive predictor of species richness (r = 0.45), followed by NR area (r = 0.40), whereas human disturbance tended to be inversely related to species richness. No significant differences were detected between the two survey methods. Despite logistical and security challenges, this study offers a baseline for future monitoring and conservation strategies and suggests that habitat heterogeneity is important for sustaining mammalian diversity.
This article interrogates the entrenched binary between modernism and realism in postwar Korean art through an analysis of the multifaceted practice of Shin Hak-chul (b. 1943). While often associated with 1980s minjung (people’s) art, Shin’s work resists reductive classification, exploring both modernist experimentation and realist critique. From the 1960s to the 1980s, his trajectory challenged the formalism of institutional modernism while reimagining the conceptual, affective, and material scope of realism. Examining his use of object-installation, photomontage, sculpture, and painting, this study shows how his work rendered the real as a convergence of material presence, perceptual immediacy, and historical consciousness. Central to the analysis is Shin’s Modern Korean History series (1980–1985), which exemplifies what I term “monumental corporeality”: a visual language of embodied memory and historical trauma. Situating Shin’s practice within both the Korean art world and broader postwar currents, the article advances an original, elastic historiography of contemporary Korean art – one attentive to how artists negotiated intersecting esthetic and sociohistorical imperatives amid rapid modernization. More broadly, it reframes realism as both a critical method and a transhistorical form within global debates over history, form, and representation.
We study flows generated within a two-dimensional corner by the chemical activity of the confining boundaries. Catalytic reactions at the surfaces induce diffusio-osmotic motion of the viscous fluid throughout the domain. The presence of chemically active sectors can give rise to steady eddies reminiscent of classical Moffatt vortices, which are mechanically induced in similar confined geometries. In our approach, an exact analytical solution of the diffusion problem in a wedge geometry is derived and coupled to the diffusio-osmotic slip-velocity formulation, yielding the stream function of associated Stokes flow. In selected limiting cases, simple closed-form expressions provide clear physical insight into the underlying mechanisms. Our results open new perspectives for the design of microscale mixing strategies in dead-end pores and cornered microfluidic channels, and offer benchmarks for numerical simulations of confined (diffusio-)osmotic systems.
Armed conflict devastates children across all regions and ideologies – inflicting profound and lasting harm on their bodies, minds, and developmental trajectories. While all sides may commit atrocities, the experience of children is tragically consistent: they are the least responsible, yet often the most harmed. This article traces the evolving global understanding of war’s impact on children, charting a journey in modern history to present-day realities. It begins with the landmark 1996 UN report by Graça Machel, which exposed the wide-ranging and systematic nature of the effects of war on children – where violence, displacement, and severed attachments force children into premature adulthood. Building on this, the 2009 and 2013 UN efforts codified the “Six Grave Violations” against children in armed conflict, now central to global monitoring and advocacy. Despite these frameworks and legal protections, including the Convention on the Rights of the Child, the 2024 UN Secretary-General’s report shows violations have surged – up 21% in the past year alone. To bring these patterns into focus, the article concludes with a case study of Gaza. Chosen for its immediacy and visibility, Gaza is emblematic of the ongoing failure to shield children from war’s worst impacts. Similar suffering persists in Sudan, Myanmar, and Ukraine. The article calls for an urgent, universal imperative: end hostilities to protect children. A trauma-informed, attachment-sensitive approach – grounded in lessons from Rwanda, Bosnia, and Syria – is essential. Clinicians, humanitarians, and policymakers must place children at the heart of all post-conflict recovery and accountability efforts.
Anorexia of ageing – the age-related reduction in appetite and food intake – is a public health concern for an ageing global population. However, current understanding of the aetiology of the condition is limited. In this review, evidence of gut hormone responses to feeding in older adults is reviewed, and it is proposed that a dysregulation of this process is a mechanism driving low appetite in later life. The evidence is synthesised to critically present this case, spotlighting recent data demonstrating a highly anorexigenic gut hormone profile in older adults exhibiting low appetite, which is not observed in older adults exhibiting a “healthy” appetite. These findings and this theory are interrogated with an appreciation that appetite control is complex and multifactorial, not least in the context of anorexia of ageing; it is posited that changes in gut hormone secretions are a mechanism rather than the mechanism, but propose that this may explain certain presentations of anorexia of ageing. The current knowledge base is contextualised for practical implications and priorities for future research are highlighted.
We extend the framework of abstract algebraic logic to weak logics, namely, logical systems that are not necessarily closed under uniform substitution. We interpret weak logics by algebras expanded with an additional predicate, and we introduce a loose and strict version of algebraizability for weak logics. We study this framework by investigating the connection between the algebraizability of a weak logic and the algebraizability of its schematic fragment, and we then prove a version of Blok and Pigozzi’s Isomorphism Theorem in our setting. We apply this framework to logics in team semantics and show that the classical versions of inquisitive and dependence logic are strictly algebraizable, while their intuitionistic versions are only loosely so.
This review synthesizes current evidence linking alterations in the gut microbiome to menopausal transition. The gut microbiota plays a crucial role in numerous physiological processes, particularly due to its bidirectional communication with the brain via multiple neural, endocrine and immune pathways. Menopause-associated oestrogen decline disrupts this axis, influencing not only gastrointestinal function and microbial diversity but also mood, cognition and inflammation. The oestrobolome is a community of gut bacteria capable of modulating circulating oestrogen levels. Taken together, research suggests a complex dynamic interplay between the intestinal microbiota and sex hormones, potentially contributing to menopausal symptoms and related comorbidities. Understanding these interactions offers promising avenues for intervention, as dietary strategies (such as isoflavones), lifestyle modifications and targeted probiotic therapies may help restore balance within the gut-brain axis and support brain health during and after the menopausal transition. Here, we highlight the importance of an integrative, microbiome-informed approach to midlife women’s health, emphasizing innovative, non-pharmacological strategies to promote long-term well-being in women.
This study examines paid and unpaid childcare distribution connected to gender relations and inequalities. We ask: what are the gender consequences of childcare distribution in Mexico? To answer this enquiry, we apply Razavi’s diamond model, examining the social dimensions of the family/household, the State, the Market, and not-for-profit (NFP) sectors. We utilise national statistics and representative surveys from the Mexican National Institute of Statistics and Geography (INEGI), complemented with published studies on Latin America and Mexico.
The article is structured as follows. First, we provide a literature review on the model related to welfare and care provision. Second, we summarise important aspects of the Mexican context. Our analysis is structured in subsections following each dimension of the diamond. We discuss our findings through a graphic representation of the model applied to Mexico, and conclude with final remarks.
Our concrete application of the model shows how the distribution of – paid and unpaid – childcare has consequences in (re)producing and strengthening gender inequalities in a myriad of spaces, dynamics, and arrangements. Key findings indicate a reduction in public childcare provision, transferring responsibilities to the household and the NFP dimensions, enhancing gendered expectations. Additionally, there is an increased protagonism of market relations within the domestic sphere and unequal conditions for those with resources.
We contribute to current studies on gender inequalities connected to welfare systems – and the lack thereof – by offering conceptual elements to develop research pathways sensitive to context-specificities, closely aligned with countries and societies within the Global South.
Throughout the twentieth century, senior roles in UK public health were reserved for doctors. Local authority medical officers of health were replaced in 1974 by NHS community physicians and from 1989 by medical directors of public health. Over the last decade of the century, an increasingly vocal group of non-medical public health professionals sought to break the glass ceiling that restricted them from advancing to senior roles; although they received encouragement from some leaders within the Faculty of Public Health Medicine, there was also significant resistance from many members. A number of factors came together around the year 2000, which culminated in a ground-breaking decision by the English Department of Health to allow non-medical appointments as directors of public health and consultants in public health in the NHS, with the then Secretary of State memorably declaring it was time to ‘take public health out of the ghetto’. At the same time, the leadership of the Faculty of Public Health Medicine overcame opposition from some of its members and opened its training, examinations, and membership to non-medical candidates. By the early 2020s, half of the renamed Faculty of Public Health members were from backgrounds other than medicine as well as 90% of directors of public health in England. This paper explores the complex history behind this unprecedented opening of a medical specialty to non-medical membership, the factors that enabled it, and the continuing legacy of tensions and inequalities within an occupation that is both a medical specialty and a multidisciplinary profession.
Modifiable health behaviours, including suboptimal dietary patterns, contribute to the global burden of disease. Messaging to raise awareness about health and nutrition behaviours is an important first step toward behaviour change and promotion of healthy dietary patterns. The aim of this rapid review was to systematically identify best practice recommendations and evidence for the development and characteristics of persuasive health and nutrition messages for awareness raising among adults. Academic reviews and grey literature reports published in English after 2010 that focused on the development or characteristics of general health or nutrition-specific messaging for awareness raising were eligible. MEDLINE Complete, CINHAL, Global Health, Embase and websites of public health organisations were searched between April and July 2024. Data was synthesised narratively. From 12 507 records, 31 were included (27 reviews and 4 reports). There was consistent support for an audience-centred approach to messaging, including audience segmentation, message tailoring and testing with target audiences. It was recommended that messages be disseminated through multiple channels, including mass and social media to facilitate repeat exposure. Message characteristics, including use of narratives, simple language, keeping messages short, conveying the general gist rather than detailed information and utilising imagery, were considered best practice for persuasive messaging. Nutrition messages that are audience-centred, tailored, thoroughly tested and incorporate elements such as narratives, imagery and simple language are likely to be accepted and persuasive among adults. Findings can be used to inform effective nutrition messaging for awareness raising in research and nutrition promotion settings.
We consider the problem of a cylindrical (quasi-two-dimensional) droplet impacting on a hard surface. Cylindrical droplet impact can be engineered in the laboratory, and a theoretical model of the system can also be used to shed light on various complex experiments involving the impact of liquid sheets. We formulate a rim-lamella model for the droplet-impact problem. Using Gronwall’s inequality applied to the model, we establish theoretical bounds for the maximum spreading radius $\mathcal{R}_{\textit{max}}$ in droplet impact, specifically $k_1 {\textit{Re}}^{1/3}-k_2(1-\cos \vartheta _a)^{1/2}({\textit{Re}}/{\textit{We}})^{1/2}\leq \mathcal{R}_{\textit{max}}/R_0\leq k_1{\textit{Re}}^{1/3}$, valid for ${\textit{Re}}$ and ${\textit{We}}$ sufficiently large. Here, ${\textit{Re}}$ and ${\textit{We}}$ are the Reynolds and Weber number based on the droplet’s pre-impact velocity and radius $R_0$, $\vartheta _a$ is the advancing contact angle (assumed constant in our simplified analysis) and $k_1$ and $k_2$ are constants. We perform several campaigns of simulations using the volume of fluid method to model the droplet impact, and we find that the simulation results fall within the theoretical bounds.
We described a 14-year-old boy who underwent catheter ablation for atrial tachycardia that had difficulty in creating the whole circuit of 3D map due to widely spread scar after repeated surgery for multivalvular heart disease. The classical atrial entrainment method was very effective in planning the catheter ablation for the invisible circuit of the atrial tachycardia.