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Infant and young child feeding (IYCF) is a critical public health priority during emergencies, yet remains poorly integrated into emergency preparedness planning in many high-income countries (HICs). Despite the availability of international guidance, such as the Operational Guidance on IYCF in Emergencies the implementation of these tools in national systems has been inconsistent within HICs. This review examines recent emergencies in HICs to identify policy and operational gaps affecting breastfeeding support, the management of commercial milk formula (CMF) and the distribution of commercially available complementary foods (CACFs). The present review focuses on the practical translation of Infant and young child feeding in Emergencies (IYCF-E) guidance into emergency responses across a range of contexts. This review highlights widespread failures to protect breastfeeding during crises, often due to a lack of trained personnel, inadequate shelter infrastructure and limited integration of IYCF into emergency protocols. CMF was frequently distributed without needs assessment or support, undermining breastfeeding and introducing risks related to hygiene and preparation. CACFs were often age-inappropriate, ultra-processed or culturally unsuitable, with potential long-term implications for child health. Even in countries with strong health systems, IYCF-E was often fragmented, under-resourced or absent from preparedness frameworks. To build nutritional resilience, IYCF-E must be embedded within public health and disaster planning, supported by legal protections, trained personnel, regulated product distribution and coordinated communication. This requires a shift in policy and perception, recognising that the right to safe and appropriate feeding in emergencies applies equally in all settings.
In this article, I discuss the inadequacy of the solution to the problem of evil in a God-created world proposed by the African perfect God theists, Kwame Gyekye and Ebunoluwa Oduwole, and highlight the success of the limited God framework of Kwasi Wiredu, J.A.I. Bewaji, and the Chimakonams in accounting for the evil in the world. However, implicit in the limitation thesis is the claim that God did his best at the time he created the world, such that the evil in it cannot be further reduced to allow for a better world. I argue that the limited God view offers a good reason to believe that a limited God can reduce the evil in the world and make it better, once the deity is conceived as a sufficiently powerful, knowledgeable, and good being with the capacity for continuous improvement within the bounds of limitation.
The introduction and use of digital contact tracing apps as part of pandemic management have notably raised many legal and ethical challenges, ranging from determinations of public interest in using gathered data to privacy protections for app users and broader considerations of national socio-economic priorities. As the use of these digital contact tracing apps is supported by laws, legal preparedness is essential in determining appropriate legal authority that considers necessary trade-offs such as temporary privacy infringements, proportional data gathering and collective public health benefits. This paper examines the extent of legal preparedness in addressing competing interests between public health and individuals in the use of digital contact tracing apps. It does so through two main lenses: (1) an analysis of Singapore’s legal framework pertaining to data protection, privacy and contact tracing apps and (2) an analysis of the domestic social and political influences that explain why Singapore’s approach to digital contact tracing was viable, and assess its potential or limits for broader applicability.
Cavitation inception in the wake of propulsor systems often arises from the interaction between multiple vortices. We use large-eddy simulation (LES) to study cavitation during the canonical interaction of a pair of unequal strength counter-rotating vortices generated in the wake of a hydrofoil pair at a chord-based Reynolds number ($ \textit{Re}$) of $1.7 \times 10^6$. The simulations reproduce the experimental observations by Knister et al. (In 33rd Symposium on Naval Hydrodynamics, Osaka, Japan, 2020) of spatially and temporally intermittent inception events occurring in the weaker vortex. Sinusoidal instabilities representing the Crow instability develop on the weaker vortex beyond one chord length downstream of the hydrofoils, causing it to bend and wrap around the stronger vortex. The inviscid stretching causes a significant reduction of the weaker core pressure and inception occurs as it approaches close to the stronger core. These intermittent inception events correspond to $3{-}4$ fold pressure reduction from the unperturbed value, with the instantaneous pressures reaching $40\,\%{-}60\,\%$ lower than the mean minimum pressure. However, the loss of circulation (${\gt} 20\,\%$) in both cores during the later stages of interaction reduces the possibility of further inception events. Statistical analysis reveals that inception occurs once per Crow cycle and is most likely to occur near the central regions of the Crow wavelength. Conditional averages show that the axial stretching is non-uniform along the weaker vortex axis, with the stretching intensities in the central regions being four times larger than the wavelength-averaged value. Probability distribution analysis shows that only a small portion of the weaker core experiences inception pressures and these regions have relatively lower axial stretching intensities compared with the bulk of the core.
Limited data exist on how trainers are trained in paediatric cardiology training centres in Europe.
Methods:
A cross-sectional study employing a structured and approved questionnaire was circulated to educationalists/trainers in 95 Association for European Paediatric and Congenital Cardiology training centres.
Results:
Trainers provided complete data for 46 centres in 20 countries. The median number of trainers in each centre was 6 (range 1–16). The median number of years trainers were in a training role was 20 years (range 2–32 years). Sixty-six per cent of trainers received some training in being a trainer, most commonly a course by a local governing college (almost 50%). Almost 78% found such courses helpful as trainers. Sixty-eight per cent of trainers felt their education in training was optimal to be an effective trainer. Assessment of trainees varies from daily to monthly between centres. Workplace assessments (used by >90% trainers) with combined formative and summative feedback were the most common type of assessment. Only one-third of trainers understood or used entrustable professional activities. Time constraints in providing training were reported by 54% of trainers as the greatest challenge in providing training. The majority of trainers expressed a need for formal “training the trainers” courses and development of standards in training.
Conclusion:
There is a marked variation in the level of training of trainers across Europe. A wide mix of assessment tools is used. Feedback is provided by the majority of trainers. Adopting a basic training programme for trainers may promote the training skills of paediatric cardiology trainers.
This research investigates the hydrodynamics of a physical boundary transition from free slip to no slip, which usually occurs in ice-jams, large wood and debris accumulation in free-surface flows. Using direct numerical simulation coupled with a volume penalisation method, a series of numerical simulations is performed for an open-channel flow covered with a layer of floating spherical particles, replicating the laboratory set-up of Yan Toe et al. (2025 J. Hydraul. Eng., vol. 151, 04025010). Flow transition from the open channel to the closed channel induces a new boundary-layer development at the top surface, accompanied by a flow separation and an increased bottom shear stress that enhances particle mobility at the bottom. Analysis of a fully developed flow in an asymmetric roughness channel (rough surface at the top boundary and smooth surface at the bottom boundary) also shows that the vertical position of maximum velocity is higher than the position of zero Reynolds shear stress, which supports the experimental observation of Hanjalić & Launder (J. Fluid Mech., vol. 51, 1972, pp. 301–335), demonstrating the shortcoming of traditional turbulence closure models such as the $k{-}\varepsilon$ model. Finally, the stagnation force acting on a particle at the leading edge of the accumulation layer is compared with the analytical prediction of Yan Toe et al. Understanding the flow transition improves the prediction of the stability threshold of the accumulation layer and design criteria for debris-collection devices.
We investigate and model the initiation of motion of a single particle on a structured substrate within an oscillatory boundary layer flow, following a mechanistic approach. By deterministically relating forces and torques acting on the particle to the instantaneous ambient flow, the effects of flow unsteadiness are captured, revealing rich particle dynamics. Laboratory experiments in an oscillatory flow tunnel characterise the initiation and early stages of motion, with particle imaging velocimetry measurements yielding the flow conditions at the motion threshold. The experiments validate and complement results from particle-resolved direct numerical simulations, combining an immersed boundary method with a discrete element method that incorporates a static friction contact model. Within the parameter range just above the motion threshold, the mobile particle rolls without sliding over the substrate, indicating that motion initiation is governed by an unbalanced torque rather than a force. Both experimental and numerical results show excellent agreement with an analytical torque balance including hydrodynamic torque derived from the theoretical Stokes velocity profile, and contributions of lift, added mass and externally imposed pressure gradient. In addition to static and rolling particle states, we identify a wiggling regime where the particle moves but does not leave its original pocket. Our deterministic approach enables prediction of the phase within the oscillation cycle at which the particle starts moving, without relying on empirical threshold estimates, and can be extended to a wide range of flow and substrate conditions, as long as turbulence is absent and interactions with other mobile particles are negligible.
The subject of this study comprises how Turkey’s EU membership is seen by HDP-supporter Kurdish voters in Turkey, as a non-EU country that has on-hold negotiations but still an ostensible vision for membership. There is a dearth of literature regarding Kurdish voters’ views on the EU, and this study, employing the focus group method, aims to address this gap by providing insights into the perspectives of Kurdish voters who support the HDP on Turkey-EU relations and their attitudes toward the EU. The study employs focus group methodology to assess whether the independentist demands that began to spring in Europe are also becoming popular among Kurdish voters. The primary finding derived from the focus group study indicates that the interviewees exhibited limited interest in both the EU negotiations and the EU’s handling of the Kurdish issue, and that the EU accession process failed to evoke significant enthusiasm among the interviewees. Meanwhile, developments pertaining to the Kurdish population in Syria and Iraq have generated a significantly higher level of enthusiasm when compared to the negotiations with the European Union.
This article discusses a passage in the speech of Lycurgus against Leocrates, and argues that a phrase usually interpreted as ‘in the willows’ should be emended to a phrase meaning ‘in the wicker market’.
Interstate conflict is rare not primarily because states settle disputes peacefully but largely because they have no serious dispute. To address this simple but oft-neglected reality, I provide a comprehensive measurement of states’ claimable areas. Focusing on three international norms that emerged after the world wars (territorial integrity, minority protection, and maritime sovereignty), I code geographical extents of states’ claimable areas for 1946–2024. I illustrate the usefulness of this dataset by applying it to oil and conflict. By leveraging the records of over 600,000 wildcat drills, natural experiments, and difference-in-differences, I demonstrate that fuel resources increased interstate conflicts only when discovered in areas claimable to multiple states. The extensive analyses of validity, heterogeneity, and mechanisms, as well as the “most-similar” case study, provide further evidence. These findings expand the emerging literature on territorial norms by providing comprehensive, rigorous, and contemporary evidence for claimability in international relations.
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.