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We give a new proof of the singular continuity of Minkowski’s $?$-function. Our proof follows by showing that the maximal Lyapunov exponent of a specific pair of $3\times 3$ nonnegative integer matrices related to Stern’s diatomic sequence is strictly greater than $\log 2$.
Silvennoinen (2025) analyzes the stored sequence going forward as an adverb that inherits adverb-class morphosyntax. This reply challenges that categorization on empirical grounds. The construction fails the key distributional test for adverbs: it cannot occur in integrated-medial position between subject and verb (*We going forward will prioritize replication), the diagnostic slot for core adverbs (We certainly will prioritize replication). Analysis of Silvennoinen’s corpus (n = 1,517) confirms this restriction – apparent ‘medial’ tokens prove either to be NP-internal modifiers or parenthetical supplements, never integrated clausal constituents. Instead, going forward patterns with PP adjuncts, occurring clause-initially, clause-finally, or as supplements. Internally, deverbal going heads the construction and licenses a directional complement forward(s), parallel to established deverbal prepositions like according [to …] and depending [on …]. The construction thus projects PP, not AdvP, aligning with The Cambridge Grammar of the English Language’s flexible-complement analysis of prepositions. This case demonstrates that storage and semantic specialization do not force categorical reanalysis.
We investigate flow instability produced by viscosity and density discontinuities at the interface separating two Newtonian fluids in generalised Couette–Poiseuille (GCP) flow. The base flow, driven by counter-moving plates and an inclined pressure gradient at angle $0^\circ \leqslant \phi \leqslant 90^\circ$, exhibits a twisted, two-component velocity profile across the layers, characterised by the Couette–Poiseuille magnitude parameter $0^\circ \leqslant \theta \leqslant 90^\circ$. Plane Couette–Poiseuille (PCP) flow at $ \phi = 0^\circ$ is considered as a special case. Flow/geometry parameters are $(\phi ,\theta )$, a Reynolds number $Re$ and the viscosity, depth and density ratios $(m,n,r)$, respectively. A mapping from the GCP to PCP extended Orr–Sommerfeld equations is found that simplifies the numerical study of interfacial-mode instabilities, including determination of shear-mode critical parameters. For interfacial modes, unstable regions in $(m,n,r)$ space are delineated by three distinct surfaces found via long-wave analysis, with the exception of strict Couette flow where the $(m,n)$ surface asymptotically vanishes with $\theta \rightarrow 0^\circ$. In interfacial stable regions but with unstable shear modes, one-layer PCP stability can be identified with a cut-off $\theta$ that conforms to canonical PCP stability. Competition between the interfacial-mode reversal phenomenon and the shear-mode cut-off behaviour is discussed. Extending to the full GCP configuration with the mapping algorithms applied, we systematically chart how pressure-gradient inclination and perturbation wavefront angle shift the balance between interfacial and shear instabilities in a specific case.
El comercio transpacífico entre América Latina y Asia Oriental durante el período previo a la Segunda Guerra Mundial ha sido escasamente estudiado. En este artículo, analizamos la construcción desde Argentina del vínculo mercantil con Japón entre 1934 y 1940. Al hacerlo, ponderamos las oportunidades y las limitaciones que surgieron en un contexto de des-globalización económica, y arrojamos luz sobre las posibilidades de diversificación geográfica del comercio exterior argentino. Abordando diversas fuentes de los sectores público y privado, el estudio revela que las iniciativas gubernamentales por profundizar los lazos con el socio oriental, apoyadas por los agroexportadores, enfrentó críticas de los empresarios textiles, quienes acusaron a Japón de ejercer dumping financiero y social.
Resource restrictions and changes to the ways in which psychiatrists are managed threaten professional autonomy and motivation. With examples from English National Health Service practice, maintaining knowledge and expertise, involvement in education and training, supporting research delivery and developing active followership skills represent transferable and realistic strategies that can improve psychiatrists’ autonomy wherever they work.
The Harnischia complex of the tribe Chironomini (Diptera: Chironomidae) comprises 20 genera. In the present study, we contribute to the taxonomic understanding of the genera Beckidia Sæther, Cryptochironomus Kieffer, and Cryptotendipes Beck and Beck of this complex in India. Our study employed an integrative taxonomic approach, incorporating morphological characteristics and molecular tools, to describe a new Cryptotendipes species. The genus Cryptotendipes, which comprises 26 species globally, is represented by five species in India, including the species that is newly described in the present study. In addition, we report new faunistic records for Beckidia hirsti (Freeman, 1957) and Cryptochironomus tamaichimori Sasa in Sasa and Kawai, 1987 for the first time from India.
Let $\gamma _{n}= O (\log ^{-c}n)$ and let $\nu $ be the infinite product measure whose nth marginal is Bernoulli $(1/2+\gamma _{n})$. We show that $c=1/2$ is the threshold, above which $\nu $-almost every point is simply Poisson generic in the sense of Peres and Weiss, and below which this can fail. This provides a range in which $\nu $ is singular with respect to the uniform product measure, but $\nu $-almost every point is simply Poisson generic.
Considerable evidence survives of the cooking and eating of kebabs as a major form of meat consumption in early China. Not only are there numerous artistic depictions in both painting and low-relief stone sculpture of this practice, but there are also some very early excavated skewers, grills, and indeed preserved meat kebabs, not to mention references in contemporary literature, and this evidence significantly predates any documentation of kebabs in the Middle East. However, in spite of this wealth of documentation, this tradition has gone largely unexplored, partly due to scholars failing to understand the relevant terminology and partly due to an unjustified belief that all kebab cooking must derive from the Middle East. This article explores the indigenous ancient Chinese tradition of kebab cooking, focused on grilling and roasting of smaller (luan) or larger (zi) pieces of meat seasoned with soybean pastes and sauces, which developed independently of other similar culinary practices elsewhere. This analysis is focused on literary evidence of the Chinese kebab, with particular reference to the contents of a recently discovered very early cookbook, dating to the Han Dynasty, excavated from the tomb of Wu Yang, first marquis of Yuanling, who died in 162 BCE.
Cette étude porte sur le changement linguistique en lien avec la référence temporelle au futur en français québécois du 21e siècle dans les données du Corpus de français parlé au Québec (CFPQ), qui couvrent la période 2006–2019. Trois variantes sont analysées: le présent du futur (PDF), le futur fléchi (FF) et le futur périphrastique (FP). Bien que plusieurs contraintes identifiées précédemment jouent un rôle semblable dans la variation (p. ex. la polarité, la présence de locutions adverbiales temporelles), la présente étude montre les taux les plus élevés de PDF en français québécois parmi les études antérieures consultées. Selon une interprétation en temps apparent, il y a une augmentation du PDF en contexte affirmatif et négatif qui n’est pas attribuable à un effet lexical. Ce résultat suggère que le PDF jouerait un rôle important dans le changement en cours par rapport à la référence temporelle au futur en français québécois.
Given $\beta>1$, let $T_\beta $ be the $\beta $-transformation on the unit circle $[0,1)$, defined by $T_\beta (x)=\beta x-\lfloor \beta x\rfloor $. For each $t\in [0,1)$, let $K_\beta (t)$ be the survivor set consisting of all $x\in [0,1)$ whose orbit $\{T^n_\beta (x): n\ge 0\}$ never enters the interval $[0,t)$. Kalle et al [Ergod. Th. & Dynam. Sys.40(9) (2020), 2482–2514] considered the case $\beta \in (1,2]$. They studied the set-valued bifurcation set $\mathscr {E}_\beta :=\{t\in [0,1): K_\beta (t')\ne K_\beta (t)~\text { for all } t'>t\}$ and proved that the Hausdorff dimension function $t\mapsto \dim _H K_\beta (t)$ is a non-increasing Devil’s staircase. In a previous paper [Ergod. Th. & Dynam. Sys.43(6) (2023), 1785–1828], we determined, for all $\beta \in (1,2]$, the critical value $\tau (\beta ):=\min \{t>0: \eta _\beta (t)=0\}$. The purpose of the present article is to extend these results to all $\beta>1$. In addition to calculating $\tau (\beta )$, we show that: (i) the function $\tau : \beta \mapsto \tau (\beta )$ is left-continuous on $(1,\infty )$ with right-hand limits everywhere, but has countably infinitely many discontinuities; (ii) $\tau $ has no downward jumps; and (iii) there exists an open set $O\subset (1,\infty )$, whose complement $(1,\infty )\setminus O$ has zero Hausdorff dimension, such that $\tau $ is real-analytic, strictly convex, and strictly decreasing on each connected component of O. We also prove several topological properties of the bifurcation set $\mathscr {E}_\beta $. The key to extending the results from $\beta \in (1,2]$ to all $\beta>1$ is an appropriate generalization of the Farey words that are used to parameterize the connected components of the set O. Some of the original proofs from the above-mentioned papers are simplified.
We present theoretical models for flow and diffusion in microfluidic polygonal mixers of arbitrary shapes. Combining work based on Boussinesq coordinates with modern methods for the calculation of the Schwarz–Christoffel transform, we present an integrated method that yields analytical solutions for both flow and concentration profiles everywhere in microfluidic mixers with arbitrary numbers of inlets. We illustrate how the problem can be reduced to a sequence of conformal maps to a known domain, where the advection–diffusion problem can be readily solved, and map back the solution to the geometry of interest. We use the method to model a number of previously published microfluidic mixer geometries, used in lipid nanoparticle synthesis, among others. The method is also applicable to other problems described by planar transport equations in polygonal domains, for instance, in groundwater flows or electrokinetics.
Recent work showing the existence of conflict-free almost-perfect hypergraph matchings has found many applications. We show that, assuming certain simple degree and codegree conditions on the hypergraph $ \mathcal{H}$ and the conflicts to be avoided, a conflict-free almost-perfect matching can be extended to one covering all vertices in a particular subset of $ V(\mathcal{H})$, by using an additional set of edges; in particular, we ensure that our matching avoids all additional conflicts, which may consist of both old and new edges. This setup is useful for various applications in design theory and Ramsey theory. For example, our main result provides a crucial tool in the recent proof of the high-girth existence conjecture due to Delcourt and Postle. It also provides a black box which encapsulates many long and tedious calculations, greatly simplifying the proofs of results in generalised Ramsey theory.
Children and young people are increasingly being referred to specialist gender services, and available data on their characteristics are limited. The Longitudinal Outcomes of Gender Identity in Children (LOGIC) study is the first independently funded UK research programme to comprehensively assess quality of life, autism, service use and the psychological well-being of children and adolescents referred to gender services.
Aims
The aim of this baseline assessment is to obtain a multidimensional profile of children and young people on the waiting list for the gender service.
Method
Data were obtained from 617 parents and caregivers and 565 children and young people, representing a quarter of those on the waiting list eligible to participate. Participants were assessed across a range of domains including gender identity, gender dysphoria, mental health and well-being, autism, physical health, service use and quality of life.
Results
Gender dysphoria rates among our sample were high, particularly among adolescents. Almost all participants had socially transitioned. Compared with children, adolescents reported significantly poorer quality of life, particularly in relation to self-perception and psychological well-being. Relative to reference population samples, our cohort demonstrated elevated levels of mental ill health and reduced quality of life, although the magnitude of these differences varied. In addition, 59% of young people aged 11 years or over reported self-harm in the past year. Over half of the cohort had received a psychiatric diagnosis, and co-occurrence rates were high. A third of the cohort was either diagnosed with autism or undergoing assessment for autism.
Conclusions
Self-perception and psychological well-being represent particularly impaired quality of life dimensions for adolescents on the waiting list for the UK’s gender service. Complementing existing knowledge, differences emerged between young people and children, reflecting that the onset of puberty is a critical factor in the well-being of this cohort.
Through the concept of the global sound archive, we propose a holistic perspective to study the sound universe accessible through the Internet. This concept refers to a reservoir of extremely heterogeneous, expansive, and unstable sound fixations that include musical expressions, soundscapes, corporeal sounds, voice messages generated through instant messaging apps, podcasts, and many other sonic phenomena. In the development of the article, we describe how agents contribute to this archive, where the sound fixations it contains are hosted, and what its central attributes are. This investigation is informed by concepts of diversity, expansiveness, instability, modularity, and intermediality.1
We investigate a novel Marangoni-induced instability that arises exclusively in diffuse fluid interfaces, that is absent in classical sharp-interface models. Using a validated phase-field Navier–Stokes–Allen–Cahn framework, we linearise the governing equations to analyse the onset and development of interfacial instability driven by solute-induced surface tension gradients. A critical interfacial thickness scaling inversely with the Marangoni number, $\delta _{\textit{cr}} \sim \textit{Ma}^{-1}$, emerges from the balance between advective and diffusive transport. Unlike sharp-interface scenarios where matched viscosity and diffusivity stabilise the interface, finite thickness induces asymmetric solute distributions and tangential velocity shifts that destabilise the system. We identify universal power-law scalings of velocity and concentration offsets with a modified Marangoni number $\textit{Ma}_\delta$, independent of capillary number and interfacial mobility. A critical crossover at $ \textit{Ma}_\delta \approx 590$ distinguishes diffusion-dominated stabilisation from advection-driven destabilisation. These findings highlight the importance of diffuse-interface effects in multiphase flows, with implications for miscible fluids, soft matter, and microfluidics where interfacial thickness and coupled transport phenomena are non-negligible.
Excavations at the Agora of Amathous, Cyprus, were carried out between 1977 and 2003, initially under the auspices of the Department of Antiquities and the direction of Michael Loulloupis, and subsequently by the French School at Athens, under the direction of Jean-Paul Prête. While the plans and chronological phases of the Agora’s buildings have been successfully reconstructed, the rich assemblage of architectural decorations – exceptionally well preserved – has yet to be thoroughly studied. The remarkable state of preservation and completeness was the primary motivation for undertaking the current research, which aims to identify the fragments of architectural decoration with their respective stoas. The reconstructed decorative program significantly enhances our understanding of historical Cypriot architecture, illuminating the influence of Alexandria and other Mediterranean centers on architectural trends. It highlights how agoras were framed with colonnaded stoas that combined traditional elements with innovative designs, revitalizing the architectural landscape of Cyprus in the Hellenistic and Roman periods.