This paper examines the impact of COVID-19 on labour governance and legal struggles faced by overseas Chinese workers. Drawing on migration studies and legal research, it explores the intersections of state, labour and law in the context of transnational mobility and dispute resolution. Through critical analysis of policy directives and court rulings, the paper highlights the Chinese government’s dual challenge in the wake of the pandemic: maintaining the continuity of overseas business operations to safeguard corporate profitability and China’s international image, while also protecting workers’ rights to uphold social stability. The findings reveal that overseas workers were at times overlooked in central government policy guidelines, despite facing unique legal, spatial and logistical challenges owing to the transnational and trans-jurisdictional nature of their employment. This lack of tailored policy attention has resulted in inconsistencies and disparities in how domestic courts adjudicate their legal claims. Gaps in overseas labour governance during times of crisis underscore the need for clearer legal stipulations and more inclusive judicial protections to address the complexities of transnational labour disputes under “Global China.”

Magnetic reconnection, a fundamental plasma process, is pivotal in understanding energy conversion and particle acceleration in astrophysical systems. While extensively studied in two-dimensional (2-D) configurations, the dynamics of reconnection in three-dimensional (3-D) systems remains under-explored. In this work, we extend the classical tearing mode instability to three dimensions by introducing a modulation along the otherwise uniform direction in a 2-D equilibrium, given by $g(y)$, mimicking a flux-tube-like configuration. We perform linear stability analysis (both analytically and numerically) and direct numerical simulations to investigate the effects of three-dimensionality. Remarkably, we find that a tearing-like instability arises in three dimensions as well, even without the presence of guide fields. Further, our findings reveal that the 3-D tearing instability exhibits reduced growth rates compared with two dimensions by a factor of $\int g(y)^{1/2} {\rm d}y\,/\int {\rm d}y$, with the dispersion relation maintaining similar scaling characteristics. We show that the modulation introduces spatially varying resistive layer properties, which influence the reconnection dynamics.

Until recently, much work on the process and impact of compensated emancipation in the British Empire tended to exclude the Cape Colony, instead focusing on Britain and the Caribbean. This analysis of the Cape Town agents who acted as intermediaries in the business of compensation reintegrates the Cape Colony into these discussions. Using Thomson, Watson & Co.’s account book, this article details how the Cape Town firm used its networks within the colony and in London to profit from the business of compensation. The firm handled over 800 claims from Cape Colony principals, purchased them on its own and others’ accounts, and remitted them to several associates in London for collection. This article contributes a new perspective to the growing literature on the process and impact of compensated emancipation and raises questions about the role of slavery and emancipation in the development of commercial and financial capitalism in South Africa.

Discussions of sample-based music are traditionally single-authored, despite the frequency of multi-genre content found within this repertoire. This article builds a case for a new approach for future analyses, justified by highlighting repertoire that embeds samples from different genres, times, and cultures and that calls upon a variety of disciplinary expertise to attend to these disparate contents. Multi-voice commentary is an approach that includes insider voices to speak to the content of sample-based music, building a reception network that runs counter to single authorial modes, broadening the narrative around sample-based music and its lineage. Certain sample-based works are most in need of this new approach, based on situations of ‘sampling up’, ‘down’, or ‘sideways’, tendencies developed from Nader’s concept of ‘studying up’ and Walser’s writings on ‘appropriations from below’. Theoretical ideas from Fish and Barthes are also brought into this discussion to further the case for a multiplicity of readings.

The Mazon Creek Lagerstätte (Moscovian Stage, late Carboniferous Period; Illinois, USA) captures a diverse view of ecosystems in delta-influenced coastal settings through exceptional preservation of soft tissues in siderite concretions. The generally accepted paradigm of the Mazon Creek biota has been that of an inferred paleoenvironmental divide between what have been termed the Braidwood and Essex assemblages, wherein the former represents a freshwater ecosystem with terrestrial input and the latter a marine-influenced prodelta setting with abundant cnidarians, bivalves, worm phyla, and diverse arthropods. Here, we revisit the paleoecology of the Mazon Creek biota by analyzing data from nearly 300,000 concretions from more than 270 locations with complementary multivariate ordinations. Our results show the Braidwood assemblage as a legitimate shoreward community and provide evidence for further subdivision of the Essex assemblage into two distinct subassemblages, termed here the Will-Essex and Kankakee-Essex. The Will-Essex represents a benthos dominated by clams and trace fossils along the transition between nearshore and offshore deposits. The Kankakee-Essex is dominated by cnidarians, presenting an ecosystem approaching the geographic margin of this taphonomic window. These new insights also allow a refined taphonomic model, wherein recalcitrant tissues of Braidwood organisms were subject to rapid burial rates, while organisms of the Essex assemblage typically had more labile tissues and were subject to slower burial rates. Consequently, we hypothesize that the Braidwood fossils should record more complete preservation than the Essex, which was exposed for longer periods of aerobic decomposition. This is supported by a higher proportion of non-fossiliferous concretions in the Essex than in the Braidwood.

On a November evening in 1618, the newly appointed governor of Virginia, George Yeardley, dined with James I at the royal hunting lodge in Newmarket, speaking to the king about his plans to turn Virginia into the English civil society investors had long promised it might become. One of Yeardley’s primary tasks was to inaugurate what has become known as the First General Assembly, held in Jamestown in 1619 in the heart of a region that its Powhatan inhabitants called Tsenacommacah. This article examines the assembly within the context of the Powhatan Chesapeake, examining how English attempts at establishing this meeting, ‘in the nature of a Parliament’, operated within a broader Indigenous political landscape. It considers some of the methodological challenges that historians face when writing about political assemblies in colonised spaces, arguing for the value of approaches that place a greater emphasis on Indigenous sources, knowledge and perspectives. A focus on material culture and archaeological remains, from embroidered deerskins to goffering irons, demonstrates how different claims to authority were tangibly imparted and contested, offering a more expansive archive of seventeenth-century transatlantic political culture.

This paper discusses the development of synthetic cohomology in Homotopy Type Theory (HoTT), as well as its computer formalisation. The objectives of this paper are (1) to generalise previous work on integral cohomology in HoTT by the current authors and Brunerie (2022) to cohomology with arbitrary coefficients and (2) to provide the mathematical details of, as well as extend, results underpinning the computer formalisation of cohomology rings by the current authors and Lamiaux (2023). With respect to objective (1), we provide new direct definitions of the cohomology group operations and of the cup product, which, just as in the previous work by the current authors and Brunerie (2022), enable significant simplifications of many earlier proofs in synthetic cohomology theory. In particular, the new definition of the cup product allows us to give the first complete formalisation of the axioms needed to turn the cohomology groups into a graded commutative ring. We also establish that this cohomology theory satisfies the HoTT formulation of the Eilenberg–Steenrod axioms for cohomology and study the classical Mayer–Vietoris and Gysin sequences. With respect to objective (2), we characterise the cohomology groups and rings of various spaces, including the spheres, torus, Klein bottle, real/complex projective planes, and infinite real projective space. All results have been formalised in Cubical Agda, and we obtain multiple new numbers, similar to the famous ‘Brunerie number’, which can be used as benchmarks for computational implementations of HoTT. Some of these numbers are infeasible to compute in Cubical Agda and hence provide new computational challenges and open problems which are much easier to define than the original Brunerie number.

In this article, we prove the local-in-time existence of regular solutions to dissipative Aw–Rascle system with the offset equal to gradient of some increasing and regular function of density. It is a mixed degenerate parabolic-hyperbolic hydrodynamic model, and we extend the techniques previously developed for compressible Navier–Stokes equations to show the well-posedness of the system in the $L_2-L_2$ setting. We also discuss relevant existence results for offset involving singular or non-local functions of density.

The Jacobian of a very general complex algebraic curve of genus at least 3 contains an algebraic cycle called the Ceresa cycle that is homologically trivial but algebraically nontrivial. Zharkov defined in analogy the tropical Ceresa cycle of a metric graph and proved a similar result for very general tropical curves overlying the complete graph on four vertices. We extend this result by considering a related, ‘universal’ invariant of the underlying graph called the Ceresa period; we show that having trivial Ceresa period has a forbidden minor characterization that coincides with the graph being of hyperelliptic type.

Early modern urban parliaments suffered an increasing monopolization of political power that hampered urban development. To combat power monopolization, some Swiss city-states reformed their election systems by randomly selecting political representatives from a pre-elected pool of candidates. We implement a difference-in-differences design and find that lottery-based election systems improved the equality of distribution of political seats within parliaments. Lottery-based elections also had positive effects on trade tax revenues, trade volumes, and infrastructure expenditures. We explain this finding by showing that lottery-based election systems fostered the election of merchants to top political positions.

This study reports on a set of experiments designed to clarify the impact of the rotational transform on confinement quality at the TJ-II stellarator. For this purpose, the net plasma current is controlled using external coils, resulting in the modification of the rotational transform profile. Significant and systematic variations of the edge electron density gradients (up to $50\,\%{-}60\,\%$) and the plasma energy content ($20\,\%{-}30\,\%$) are achieved. The explanation of this behaviour relies on the placement of low-order rational surfaces in relation to the edge gradient region, which affect local turbulence fluctuation levels, facilitating the formation of zonal flows and concomitant transport barriers. This hypothesis is confirmed experimentally on the basis of a broad array of diagnostic measurements. Calculations based on a resistive magnetohydrodynamic turbulence model provide qualitative support for this hypothesis, clarifying the impact on confinement of specific rational surfaces and highlighting the complex nature of magnetically confined fusion plasmas.

Vocal fold vibrations are more difficult to achieve in obstruents than sonorants due to the aerodynamic voicing constraint (AVC), i.e., the fact that a buildup of air pressure in the supraglottal cavity during oral closures reduces the transglottal airflow. The AVC can be circumvented by various voicing adjustment gestures, such as larynx lowering, tongue root advancement and tongue body lowering. The current study employed laryngeal and lingual ultrasound to investigate the use of these strategies in Canadian French. The vertical movement of the larynx was measured using optical flow analysis, while lingual movement was analyzed by tracking X and Y coordinates at distinct fanlines across consecutive images.

Results revealed that there was more pronounced larynx lowering in voiced obstruents and that it tended to be greater in voiced stops than in voiced fricatives. Tongue-related maneuvers displayed more interspeaker variation but tendencies showed that the tongue root was more advanced in voiced stops than in voiced fricatives and slightly more for /d/ than /b/. Significant tongue body lowering was observed for both voiced stops and voiced fricatives only preceding the vowel /a/. Finally, larynx lowering was strongly correlated with voicing duration in voiced obstruents. A similar but weaker correlation was found for tongue root advancement.

Overall, this study suggests that larynx lowering is an efficient strategy to circumvent the AVC in Canadian French but that some speakers may also resort to lingual adjustments. Additional strategies that are known to play a role, such as nasal or oral leakage, were not considered.