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Lutjanus malabaricus represents a widely distributed and intensively exploited snapper species. The present article is the first attempt to describe the life-history traits of L. malabaricus in Vietnamese waters and estimate their variability. The fish were collected at the landing sites of Nghe An and Ha Tinh provinces from June 2020 to May 2021. The standard length of fish ranged from 10 to 74 cm, weight varied between 18.53 and 8972.89 g, age ranged from 1 to 17 years and all three parameters were subjected to a significant seasonal variation. A similar seasonal pattern was observed in the variation of maturity and gonadosomatic index. We assume that the observed variation of the stock structure is the result of spawning migrations when large fish migrate inshore from the foraging grounds. Growth and weight gain of fish were described via the von Bertalanffy function, constants of the equations were as follows: L∞ = 76.2, K = −0.077, t0 = −2.26 in males and L∞ = 56.9, K = −0.176, t0 = −0.48 in females; W∞ = 6498, K = −0.100, t0 = −1.96 in males and W∞ = 8317, K = −0.100, t0 = −1.31 in females. The growth constants of the North Vietnamese stock of L. malabaricus are similar to the ones of the North-eastern Australian stock. A general tendency for the reduction of the growth rate and asymptotic size from equatorial waters to higher latitudes was observed.
Self-organization of the vorticity condensate of forced two-dimensional turbulence is examined in analogy with the mixing of a background planetary vorticity gradient in geophysical flows. Starting from the theoretical vorticity profile of the condensate, different scenarios are illustrated by the construction of idealized angular momentum conserving rearrangements of vorticity into a staircase profile similar to the potential vorticity staircase of $\beta$-plane turbulence. Two sets of numerical experiments are then presented that illustrate a similar self-organization of the background vorticity gradient in fully turbulent flows. In the first set of experiments, the flow is initialized with a laminar vortex dipole corresponding to the theoretical condensate vorticity profile. A fluctuation vorticity field is then induced by a stochastic forcing at smaller scales, which induces an azimuthally symmetric self-organization of the laminar flow into distinct annular bands. In the second set of experiments, the flow is initialized from rest with stochastic forcing generating a turbulent inverse energy cascade, out of which emerges the condensate in a self-consistent evolution as the turbulent energy accumulates at the domain scale. A self-organization of the condensate is again observed, giving a distinct annular structure on top of the theoretically predicted condensate profile. A major difference from the potential vorticity staircase of geophysical flows is the emergence in many cases of significantly non-monotonic radial vorticity profiles.
We prove existence and uniqueness for the inverse-first-passage time problem for soft-killed Brownian motion using rather elementary methods relying on basic results from probability theory only. We completely avoid the relation to a suitable partial differential equation via a suitable Feynman–Kac representation, which was previously one of the main tools.
We find that the Campbell–Cochrane external-habit model can generate a value premium if the persistence of the consumption surplus is sufficiently low. Such low persistence is supported by micro evidence on consumption. If the mean and conditional volatility of consumption growth are highly persistent, as in the Bansal–Yaron long-run risk model, then fast-moving habit can also generate, without eroding the value premium: i) empirically sensible long horizon return predictability; and ii) a price–dividend ratio for market equity that exhibits the high autocorrelation found in the data. Fast-moving habit also delivers several empirical properties of market-dividend strips.
In this article, I offer a response to Joanna Leidenhag's book Mind Creation: Theological Panpsychism and the Doctrine of Creation. Whereas Leidenhag argues that the panpsychist's demands for explanation of the mind lead naturally to demands for an explanation of the whole universe, I counter that (i) the panpsychist's explanatory demands are not necessarily quite as general as Leidenhag presumes, and (ii) demands for an explanation of the whole universe can in any case be satisfying via the postulation of a self-explaining universe. I agree with Leidenhag that panpsychism is potentially a helpful way for Christians to think about the relationship between God and the universe, while disagreeing concerning how well suited process theism is to making sense of such a relationship. Finally, in terms of eco-philosophy, I agree with Leidenhag that panpsychism is conducive to a healthier relationship between humans and the natural world, while expressing reservations that a specifically Christian form of panpsychist eco-philosophy is preferable.
This article reveals the hold that German history and constitutionalism had on Indian federalists in the interwar period. A range of federalists from Indian princely states and British provinces, eager to see India become a federation rather than a unitary state fashioned on the English model, looked to Imperial Germany for constitutional lessons. They saw in German history and constitutionalism a federal solution to the so-called “Indian problem,” wherein the rights of the states would be primary over those of individuals or groups. This German-inspired federal tradition, I argue, departed not only from political pluralism and association-based federalism, but also from the nationalist vision of placing individual rights over state rights. This article presents an alternative genealogy of comparative constitutional thought in India, and examines a post-national worldview that sidestepped the nation-states. By bringing a comparative approach to bear on political and constitutional histories, it escapes the national insularity that often characterizes such histories in colonial India, and places them in the comparative and global context of the interwar circulation of federalist ideas. German-inspired federal ideas of the period offer a counterpoint to corralling futuristic visions of India, and its founding, on the twin axes of anticolonial nationalism and popular sovereignty to the exclusion of state-centric ideas articulated by the princely states.
Adverse childhood experiences (ACEs) have been associated with worse cognitive health in older adulthood. This study aimed to extend findings on the specificity, persistence, and pathways of associations between two ACEs and cognition by using a comprehensive neuropsychological battery and a time-lagged mediation design.
Method:
Participants were 3304 older adults in the Health and Retirement Study Harmonized Cognitive Assessment Protocol. Participants retrospectively reported whether they were exposed to parental substance abuse or experienced parental physical abuse before age 18. Factor scores derived from a battery of 13 neuropsychological tests indexed cognitive domains of episodic memory, executive functioning, processing speed, language, and visuospatial function. Structural equation models examined self-reported years of education and stroke as mediators, controlling for sociodemographics and childhood socioeconomic status.
Results:
Parental substance abuse in childhood was associated with worse later-life cognitive function across all domains, in part via pathways involving educational attainment and stroke. Parental physical abuse was associated with worse cognitive outcomes via stroke independent of education.
Conclusions:
This national longitudinal study in the United States provides evidence for broad and persistent indirect associations between two ACEs and cognitive aging via differential pathways involving educational attainment and stroke. Future research should examine additional ACEs and mechanisms as well as moderators of these associations to better understand points of intervention.
Sending microwaves through bauxite ore allows almost continuous measurement of moisture content during offload by conveyor belt from a ship. Data and results from a microwave analyser were brought to a European Study Group with Industry at the University of Limerick, with the over-arching question of whether the results are accurate enough. The analyser equipment uses linear regression against phase shifts and signal attenuation to infer moisture content in real time. Simple initial modelling conducted during the Study Group supports this use of linear regression for phase shift data. However, that work also revealed striking and puzzling differences between model and attenuation data.
We present an improved model that allows for multiple reflections of travelling microwaves within the bauxite and in the air above it. Our new model uses four differential equations to describe how electric fields change with distance in each of four layers. By solving these equations and taking reflections into account, we can accurately predict what the receiving antenna will pick up.
Our new solution provides much-improved matches to data from the microwave analyser, and indicates the deleterious effects of reflections. Modelled signal strength behaviour features a highly undesirable noninvertible dependence on bauxite mixture permittivity.
Practical measures that might be expected to reduce the effects of microwave reflections and improve the accuracy of microwave analyser results are suggested based on our improved model solution. This modelling approach and these results are anticipated to extend to the analysis of moisture content during transport on conveyor belts of other ores, slurries, coal, grains and pharmaceutical powders, especially when the depth of the conveyed material is variable.
We study the position of the computable setting in the “common theory of locality” developed in [4, 5] for local problems on $\Delta $-regular trees, $\Delta \in \omega $. We show that such a problem admits a computable solution on every highly computable $\Delta $-regular forest if and only if it admits a Baire measurable solution on every Borel $\Delta $-regular forest. We also show that if such a problem admits a computable solution on every computable maximum degree $\Delta $ forest then it admits a continuous solution on every maximum degree $\Delta $ Borel graph with appropriate topological hypotheses, though the converse does not hold.
This article examines the racial politics of decolonization in late-colonial Nairobi in the decade before independence through the unique space of the colonial bus using archival letters from a group of European women who called themselves ‘The Housewives’. In letters to Nairobi's mayor and the Kenya Bus Service (KBS), the Housewives argued against a newly proposed transportation policy that would make all seating on the colonial buses the same price, doing away with the first-class section. The letters reveal that African bus riders, particularly Muslim women riders, were centrally important in this crucial time in Kenya's urban history. With Nairobi still under a ‘State of Emergency’ as military operations against the Land and Freedom Army (Mau Mau) were coming to an end, these letters show colonial buses as battlegrounds during the final years of British colonial rule in Kenya with extremely porous social borders and transportation vehicles serving as rich sites of urban life.
This paper investigates an operation mechanism for mutual aid platforms to develop more sustainably and profitably. A mutual aid platform is an online risk-sharing platform for risk-heterogeneous participants, and the platform extracts revenues by charging participants commission and subscription fees. A modeling framework is proposed to identify the optimal commissions and subscriptions for mutual aid platforms. Participants are divided into different types based on their loss probabilities and values derived from the platform. We present how these commissions and subscriptions should be set in a mutual aid plan to maximize the platform’s revenues. Our analysis emphasized the importance of accounting for risk heterogeneity in mutual aid platforms. Specifically, different types of participants should be charged different commissions/subscriptions depending on their loss probabilities and values on the platform. Participants’ shared costs should be determined based on their loss probabilities. Adverse selection occurs on the platform if participants with different risks pay the same shared costs. Our results also show that the platform’s maximum revenue will be lower if the platform charges the same fee to all participants. The numerical results of a practical example illustrate that the optimal commission/subscription scheme and risk-sharing rule result in considerable improvements in platform revenue over the current scheme implemented by the platform.
In this article we rethink the chronotope approach by examining what happened to religious space-times in a Chinese urban development project that completely transformed what had once been five relatively rural townships. What happens to chronotopes when a place is so completely transformed? We focus on multiple chronotopic dimensions in the religious experience of those villagers whose families had long occupied this land, but who now live separated from their old neighbors, without their old livelihoods, having lost their old temples, and surrounded by new migrants who are generally wealthier and better educated. Building on recent anthropological work on chronotopes, coupled with insights taken from Maurice Merleau-Ponty and Gilles Deleuze, this article explores the complex interrelationships and workings of chronotopes through the idea of the fold. This approach reconsiders what the boundaries between chronotopes might look like—not necessarily straight lines that are difficult to cross, but more like the infinite inflections of curves as those curves intersect and interact with each other. Rather than thinking of chronotopes as structured wholes separated by clear boundaries—much as we also tend to think about “states,” “cultures,” or “ontologies”—folding allows us to reconceptualize the kinds of interactions that take place when one space-time touches another. We examine in particular three ways in which folding elucidates how chronotopic boundaries can work: they can make the distant near, separate inside from outside, and complicate the boundary by interdigitating.
This article examines the under-researched, inter-connected issues of substantive remedy and a role for Organization for Economic Cooperation and Development (OECD) National Contact Points (NCPs) to complement judicial remedy regimes involving civil liability for companies in home-state jurisdictions. Even where access to judicial procedural remedy exists, it need not ensure substantive remedy. Legal and economic resource-based power-disparities between parties can reduce victims’ opportunities to present and argue their case; and courts offer limited substantive remedy options compared with the types listed by the United Nations Guiding Principles on Business and Human Rights. The article argues that combining access to NCPs and judicial remedy offers important opportunities to address well-recognized challenges for victims’ access to substantive remedy, especially with strong NCPs. NCPs can operate in ways that courts normally cannot, to help give victims voice and a choice of substantive outcome. The European Union’s Corporate Sustainability Due Diligence Directive (CSDDD) proposal serves as a cue for the analysis. However, the issue is relevant for any OECD member or the OECD Guidelines adherent state.
Two metasurface-inspired antennas embedded in a metallic cavity are introduced here. They are expected to be integrated on fast moving platforms enduring harsh accelerations and shocks. The metasurface allows enlarging the antenna bandwidth that is intrinsically reduced for small antennas embedded in sub-wavelength metallic cavities. The first one is only 60 × 60 × 20 mm3 (0.23λ1 × 0.23λ1 × 0.08λ1 at the frequency of 1164 MHz) and presents a dual-band behavior, covering both the lower and upper global navigation satellite systems (GNSS) bands (all GNSS bands are covered). It is fed by four probes and a dedicated circuit, ensuring the phase quadrature between adjacent feeds to achieve circular polarization over these two bands. For the second proposed antenna, circular polarization is achieved using two feed points connected to the radiating aperture of size 50 × 50 × 20 mm3 (0.26λ0 × 0.26λ0 × 0.10λ0 at the frequency of 1559 MHz). It covers the E1, L1, B1, and G1 GNSS bands. The numerical results are successfully validated by measurements.
Mangroves are subject to rapid and large-scale habitat changes, which threaten their unique genetic diversity and provision of critically important ecosystem services. Habitat fragmentation reduces connectivity, which can impair dispersal and lead to genetic isolation. However, it is unclear whether fragmentation could impact mangrove genetic isolation, as mangrove propagules appear to be able to disperse long distances. Here, we conducted a meta-analysis of studies testing for a correlation between geographic distance and genetic distance in mangrove plants. From the 22 studies that met the inclusion criteria, we found a significant isolation-by-distance effect; geographic distance was significantly associated with Nei’s genetic distance and FST. Our results show that mangrove propagules may be limited in their capacity to disperse across long distances, which highlights the importance of maintaining close proximity between habitat patches and reducing habitat fragmentation.
Cet article étudie les attitudes des Québécois à l’égard des personnes assistées sociales. Il s'intéresse à la variation du niveau d'aide mensuel que les Québécois sont prêts à leur accorder en fonction du profil de prestataires. L'article vise plus spécifiquement à étudier l'influence de l'aptitude au travail en tant qu'heuristique de mérite structurant l'opinion des Québécois. Nos résultats indiquent que les Québécois sont d'avis que les prestataires de l'assistance sociale devraient recevoir des soutiens mensuels inférieurs à ce qu'ils considèrent être le revenu minimum nécessaire pour couvrir les besoins de base. L'opinion des Québécois quant au niveau adéquat d'aide devant être offerte aux personnes assistées sociales est aussi fortement structurée par la question de l'aptitude au travail et par la perception que les individus sont en contrôle de leur situation. Finalement, la notion d'aptitude au travail se distingue clairement d'une variété d'autres caractéristiques individuelles pouvant influencer les opinions des Québécois.
Florence Price (1887–1953) was instrumental in establishing a “black musical idiom” in the twentieth century (Samantha Ege, 2020) by embedding vernacular songs into her works, including Violin Fantasy No. 2 in F-sharp minor, built on “I'm workin’ on my Buildin.’” In 1940 she arranged the melody as the second of the Two Traditional Negro Spirituals, finished on March 26, 1940. On March 29 and 30, 1940, she quickly dispatched Fantasy No. 2. Price often performed the piano part of her works herself. The performative act of playing Fantasy No. 2 with its embedded spiritual “I'm workin’ on my Buildin’ […] All for my Lord” would have solidified her faith, which rested in part in her own interpretation of its lyrics: Her “work” on her “buildin” and foundations, in composition and in life. Furthermore, each performance of Fantasy No. 2 would have created an embodied performed commemoration, from her perspective, of historical events of injustice and oppression in the Jim Crow South, which she abandoned in 1927 for Chicago. By engaging with Price's fantasies through the lens of performance studies and genre theory, and by drawing on Ege (2020), Rae Linda Brown (2020), Cooper (2019, 2020), and Douglas Shadle (2021), this article examines Price's vernacular foundation and sonic foundation-building symbolically. Meanings of freedom emerge on several levels, which we relate to creative freedom and to “freedoms in the most oppressive of social environments,” such as Price's environment, to which she responded with “a powerful musical language” (Ege, 2020).