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.
We study the transfer of (co)silting objects in derived categories of module categories via the extension functors induced by a morphism of commutative rings. It is proved that the extension functors preserve (co)silting objects of (co)finite type. In many cases the bounded silting property descends along faithfully flat ring extensions. In particular, the notion of bounded silting complex is Zariski local.
Seabirds are experiencing a decline in their populations because of climate change and human activities. Understanding their spatiotemporal dynamics is crucial for effective conservation, but the distribution and movement patterns of pelagic seabirds are not yet fully elucidated. In the present study, we investigated the seasonal movements and wintering areas of Swinhoe’s Storm-petrel Hydrobates monorhis, a Near Threatened species that breeds primarily on islands in the north-western Pacific. The data analyses of geolocators retrieved from four birds showed that Swinhoe’s Storm-petrels migrated across the north-western Pacific and Indian Oceans and wintered in the Arabian Sea. The distance between their breeding colony and the wintering area was approximately 6,700 km, and the tracking distance for a seasonal migration exceeded 12,000 km. The migration pathway was characterised by large-scale movements in both north–south and east–west directions in the Eurasian offshore regions, which previously had been inferred from direct observations at such areas but not empirically confirmed. Wintering areas in the Arabian Sea overlapped with regions where plankton blooms are triggered by the monsoon in winter, which may produce high marine productivity and support the wintering of Swinhoe’s Storm-petrels in this sea area.
This study introduces a boundary element method to solve the three-dimensional problem of internal tide generation over arbitrary isolated seamounts in a uniformly stratified finite-depth fluid with background rotation, without assumptions on the size or slope of the topography. Focusing on linearly propagating waves with small tidal excursions, the approach employs a vertical mode decomposition to describe the wavefield and the wave energy flux. We apply the model to the generation of internal tides by a unidirectional barotropic tide interacting with an axisymmetric Gaussian seamount. We study the conversion rate and flow field for various topographic configurations. We qualitatively recover some of the two-dimensional results of Papoutsellis et al. (2023 J. Fluid Mech.964, A20), and find topographies with weak conversion rates, as discussed by Maas (2011 J.FluidMech.684, 5–24). Furthermore, our results reveal the previously underestimated influence of the Coriolis frequency on the wavefield and on the spatial distribution of radiated energy flux. Due to Coriolis effects, the energy fluxes are shifted slightly counter-clockwise in the northern hemisphere. We explain in detail how this shift increases with the magnitude of the Coriolis frequency and the topographic features and why such effects are absent in models based on the weak topography assumption.
Informal care-giving studies have largely ignored how gender and labour force participation intersect to shape filial support across diverse national contexts over time. In particular, comparative longitudinal research that explores care-giving intensity in relation to adult children’s employment status and gender remains scarce. This study addresses this gap by developing a typology of filial support and examining how care-giving patterns vary by gender and labour force participation across different country clusters in Europe and Israel.
Drawing on longitudinal data from the Survey of Health, Ageing and Retirement in Europe, we apply latent Markov models and multi-level latent class analysis to identify seven distinct filial support states, ranging from no support to very intense support. We also classify 28 countries into three clusters based on levels of involvement in filial support: low, moderate and high.
Our findings indicate significant disparities based on gender and employment status, with daughters tending to provide more intensive support than sons, even when employed. Unemployed sons in countries with moderate involvement in filial support were three times more likely to provide intensive care compared to their counterparts in countries characterized by low or higher involvement. These variations suggest that support to ageing parents is deeply shaped by gendered employment opportunities and cultural care-giving norms.
This complexity underscores the necessity for nuanced policy approaches to support care-givers effectively, considering both gender inequalities and employment contexts. Recognizing these intricate patterns of informal care can inform targeted interventions, ultimately addressing the care-giving burden within ageing societies more effectively.
To achieve more targeted antibiotic use, this research paper addresses the investigation of a quarter-selective dry cow therapy (QSDCT) on 16 commercial dairy farms based solely on the pathogen species detected. Cytobacteriological analysis was performed on quarter milk samples collected 2 weeks prior to drying off and 3 to 5 days after calving. Treatment decisions were based on results before dry-off: Only quarters infected with major bacterial pathogens were treated with antibiotics. To prevent new intramammary infections (IMI), all quarters received an internal teat sealant. A total of 1,155 dry periods were evaluated. Only 8.1% of all quarters (range per farm 2.6% – 28.8%) were treated with antibiotics at dry-off and a high bacteriological cure risk of 97.1% was determined for IMI in these antibiotic-treated quarters. For IMI caused by minor pathogens a self-cure risk of 82.1% was observed. The risk of new IMI after calving was 14.6%. Results of binomial logistic regression models indicated that self-cure of IMI by minor pathogens was not related to the pathogen group, the level of quarter somatic cell count at dry-off, or the presence of at least one other quarter infected with minor pathogens in a cow. Furthermore, the risk for new IMI in uninfected quarters was not increased by the presence of at least one quarter infected with major pathogens within cow. However, 95.4% of all IMI by major pathogens after calving were due to new IMI. In conclusion, a pathogen-based QSDCT can be successfully applied on commercial dairy farms to reduce the antibiotic use, but more attention should be paid to prevent new IMI.
The integration of gambling-like features in modern gaming blurs the line between gaming and gambling. Rapidly evolving monetisation strategies in games, especially microtransactions like loot boxes, exploit psychological reward processes similar to gambling disorder. These include variable ratio schedules, positively reinforced wins, and near-miss effects, among others. Such mechanisms encourage impulsive spending, prolonged engagement, and the development of problematic habits. The risks involved are especially concerning for younger players and individuals with comorbid mental health disorders, who may be more vulnerable to these features. Despite these clear parallels with gambling, regulatory frameworks often fail to address the overlap, leaving consumers exposed to financial and psychological harm. This editorial highlights the urgent need for an updated gambling definition in the context of gaming, increased transparency in game design, stricter age restrictions, and stronger regulatory oversight to safeguard player well-being as the industry continues to expand.
This paper uses a dynamic general equilibrium approach that takes into account the macroeconomic implications of the green transition and its consequences for public finances. It shows that when the government relies too heavily on expenditure-based measures, it threatens the sustainability of public debt, by increasing the probability of sovereign default, leading to higher interest rates on government bonds. This higher public default risk has potentially significant repercussions on investment financing conditions for the private sector, and increases the cost of the transition to a net-zero economy. On the other hand, carbon pricing policies make the transition more viable for public finances, at the expenses of similarly high economic costs, while remaining effective in reducing greenhouse gas emissions. The welfare-maximizing optimal policy mix results in a balanced approach, with the public sector’s contribution to the total mitigation effort increasing gradually, ranging from 25% to 40% between 2030 and 2050.
The evolutionary history of freshwater sponges (Porifera: Spongillida) in Australasia is poorly understood due to a paucity of fossils. A new genus and new species, Protooncosclera zealandiae n. gen. n. sp., family Potamolepidae, was discovered in southern New Zealand from lacustrine diatomites/spiculites of latest Oligocene–earliest Miocene of the Fossil-Lagerstätte at Foulden Maar. The fossil spicular complement is similar to that of the extant genus Oncosclera but differs from that and all other Spongillida genera by possessing a structured gemmular architecture armed by ornamented strongyles and strongyloxeas, with theca surrounded by a spicular cage of slender acanthoxeas, and a skeletal spicular complement of stout, smooth to spiny oxeas. This is the first fossil (pre-Quaternary) record of freshwater sponges from Australasia and fits into the Gondwana-like distribution of potamolepid freshwater sponges. Its discovery in a subtropical maar lake on the southwestern margin of Zealandia confirms a formerly wider geographic distribution of Potamolepidae in the Cenozoic, followed by range retractions related to post-Early Miocene climate cooling. The stratigraphic distribution of sponge remains at Foulden Maar demonstrates that sponges colonized the isolated maar lake soon after its formation, most likely by passive dispersal by water birds, and then thrived in the shallow water margins of the paleolake for ca. 130,000 years. Sponge remains, skeletal spicules and gemmules, frequently associated with coprolites indicate that sponges were consumed by one or more spongivorous taxa, presumably fish belonging to the Southern Hemisphere family Galaxiidae.
For $\ell \geq 3$, an $\ell$-uniform hypergraph is disperse if the number of edges induced by any set of $\ell +1$ vertices is 0, 1, $\ell$, or $\ell +1$. We show that every disperse $\ell$-uniform hypergraph on $n$ vertices contains a clique or independent set of size $n^{\Omega _{\ell }(1)}$, answering a question of the first author and Tomon. To this end, we prove several structural properties of disperse hypergraphs.
States increasingly confront security threats from exiled economic elites who retain power through offshore wealth, political influence, and informational leverage. This paper introduces the concept of weaponised legal dependence to explain why and how states file commercial lawsuits against their own citizens in foreign courts – particularly in global legal hubs like London – to neutralise these transnational plutocratic threats. While conventional tools of transnational repression (e.g., extradition, abduction, information warfare) target dissidents’ legitimacy or messaging power, only foreign litigation can directly constrain the material assets that underpin a plutocrat’s influence. However, initiating extraterritorial claims is costly, risky, and entails a partial surrender of sovereignty to liberal jurisdictions. I argue that states resort to these legal strategies when they face power parity with plutocrats – situations where neither side has hierarchical control, prompting political conflict to spill into foreign legal systems under the guise of commercial dispute. Drawing on 60 interviews with legal practitioners and case studies from Russia and Kazakhstan, this paper shows how states instrumentalise the credibility of liberal legal institutions to reclaim offshore assets and delegitimise their rivals. In doing so, illiberal regimes exploit liberal infrastructure, turning courts meant to enforce commercial norms into battlegrounds of domestic power politics.
We investigate the properties of the linear two-way fixed effects (FE) estimator for panel data when the underlying data generating process (DGP) does not have a linear parametric structure. The FE estimator is consistent for some pseudo-true value and we characterize the corresponding asymptotic distribution. We show that the rate of convergence is determined by the degree of model misspecification, and that the asymptotic distribution can be non-normal. We propose a novel autoregressive double adaptive wild (AdaWild) bootstrap procedure applicable for a large class of DGPs. Monte Carlo simulations show that it performs well for panels of small and moderate dimensions. We use data from U.S. manufacturing industries to illustrate the benefits of our procedure.
To what extent should workers in physically demanding jobs be given the possibility of earlier retirement? This is one of the many pressing pension reform issues that ageing societies face. This article examines the extent to which such special treatment is supported by the general public. We uniquely combine a representative survey (2,136 respondents) with a vignette study to explore what respondents in the Netherlands consider a fair public pension age for 29 jobs that differ by level of physical demand. We also examine whether these pension ages are associated with other attributes that are important in an ageing society, such as the presence of chronic health conditions and informal care-giving responsibilities – such attributes may affect support for the special provisions for workers in physically demanding jobs – and control for stereotypical views about older workers. The findings reveal notable differences in public pension ages, indicating that workers in highly physically demanding jobs should be given the opportunity to retire earlier and those working in physically ‘light’ jobs should work slightly beyond the standard public pension age. We compare these differences to existing special retirement programmes for physically demanding or arduous jobs. Interestingly, non-work factors – namely, chronic health conditions and care-giving responsibilities – weigh more heavily in deciding a fair or reasonable public pension age. This suggests that organizations and policy makers facing an ageing society will have to deal with a broader set of problems than can be solved by offering early retirement programmes for specific jobs.
In this précis of Radical Skepticism and Epistemic Intuition (Oxford 2021), I highlight the book’s main lines of argument and provide an overview of each of the book’s three parts. I explain how: part I identifies the best kind of argument for radical skepticism and objects to one of the two main ways of responding to it; part II presents my version of the other main way of responding to that skeptical argument (a version that relies heavily on epistemic intuition); and part III defends epistemic intuition (and, thereby, my response to radical skepticism) from several important objections.