This paper examines Britain’s process of electrification following a disruptive stock market boom and bust in 1882. This is done by noting the companies that raise finance on British stock exchanges, the amounts raised, and the returns earned on that money. It also examines the impact of the Lighting Act of 1882, finding that the Act inhibited investment, but with important exceptions. We find the Act was not a barrier to entrepreneurs alert to the possibilities of electrification. However, the limited British electrical investment after the 1882 crash was more heavily and successfully concentrated on supplying electricity to end users than on developing electrical equipment. When electrification began in earnest after 1888, upon the amendment of the 1882 Lighting Act, there existed only a very weak engineering base to support it, leading to slow, expensive, and unimaginative electrification.

This study marks the first update on Malaysia’s marine tardigrades after more than 50 years, presenting both the discovery of a new species, Batillipes malaysianus sp. nov., and a new record, Batillipes rotundiculus. The specimens were collected from the intertidal zone at Pantai Pancur Hitam, Labuan, Malaysia, during two separate sampling efforts. Despite extensive sampling, the density of marine tardigrades in the area was found to be exceptionally low, with only a single specimen of B. malaysianus sp. nov. and a limited number of other Batillipes individuals collected. The new species, B. malaysianus sp. nov., is distinguished by unique morphological features, including setae scattered across the ventral cuticle – a trait not observed in any other species of the genus – and constricted primary clavae, a characteristic absent in other species of the B1 toe arrangement group. Additionally, B. rotundiculus represents the first confirmed record of this species in Malaysia, expanding its known distribution. This study also updates the global species count of Batillipes to 42, incorporating recent taxonomic changes and this new addition. An updated dichotomous key for the genus is provided, incorporating all species described to date. These findings underscore the importance of exploring understudied marine habitats and highlight the potential for discovering more tardigrade species in Malaysia.

This study advances neorealist theory by examining how systemic constraints shape state behavior through economic statecraft, focusing on China’s Belt and Road Initiative (BRI) and Iran’s strategic calculations. Employing methodological triangulation – network analysis, discourse examination, and institutional assessment – this research explores the strategic logic underpinning the China-Iran engagement. For Iran, the BRI emerges as a mechanism for institutional resilience and sanctions circumvention, though its integration remains constrained by systemic limitations and regional competition. For China, the BRI serves as a geopolitical infrastructure strategy to expand influence and secure resources, despite concerns over economic sustainability. By framing economic statecraft as a strategic response to systemic constraints, this study challenges conventional materialist and militaristic paradigms of international relations. It critically assesses the generalizability of BRI partnerships, illustrating how states, bound by structural limitations, use economic instruments to reshape their strategic environments. Ultimately, the research offers nuanced insight into emerging power dynamics in a multipolar world, extending beyond traditional power-centric models.

R. Pavlov and S. Schmieding [On the structure of generic subshifts. Nonlinearity 36 (2023), 4904–4953] recently provided some results about generic $\mathbb {Z}$-shifts, which rely mainly on an original theorem stating that isolated points form a residual set in the space of $\mathbb {Z}$-shifts such that all other residual sets must contain it. As a direction for further research, they pointed towards genericity in the space of $\mathbb {G}$-shifts, where $\mathbb {G}$ is a finitely generated group. In the present text, we approach this for the case of $\mathbb {Z}^d$-shifts, where $d \ge 2$. As it is usual, multidimensional dynamical systems are much more difficult to understand. In light of the result of R. Pavlov and S. Schmieding, it is natural to begin with a better understanding of isolated points. We prove here a characterization of such points in the space of $\mathbb {Z}^d$-shifts, in terms of the natural notion of maximal subsystems that we also introduce in this article. From this characterization, we recover the result of R. Pavlov and S. Schmieding for $\mathbb {Z}^1$-shifts. We also prove a series of results that exploit this notion. In particular, some transitivity-like properties can be related to the number of maximal subsystems. Furthermore, we show that the Cantor–Bendixon rank of the space of $\mathbb {Z}^d$-shifts is infinite for $d>1$, while for $d=1$, it is known to be equal to one.

This paper presents a general approach to synthesizing closed-loop robots for machining and manufacturing of complex quadric surfaces, such as toruses, helicoids, and helical tubes. The proposed approach begins by employing finite screw theory to describe the motion sets generated by prismatic, rotational, and helical joints. Subsequently, generatrices and generating lines are put forward and combined for type synthesis of serial kinematic limbs capable of generating single-DoF translations along spatial curves and two-DoF translations on complex quadric surfaces. Following this manner, the two-DoF translational motion patterns on these complex quadric surfaces are algebraically defined and expressed as finite screw sets. Type synthesis of close-loop robots having the newly defined motion patterns can thus be carried out based upon analytical computations of finite screws. As application of the presented approach, closed-loop robots for machining toruses are synthesized, resulting in four-DoF and five-DoF standard and derived limbs together with their corresponding assembly conditions. Additionally, brief descriptions of robots for machining helicoids and helical tubes are provided, along with a comprehensive list of all the feasible limbs for these kinds of robots. The robots synthesized in this paper have promised applications in machining and manufacturing of spatial curves and surfaces, enabling precise control of machining trajectories ensured by mechanism structures and achieving high precision with low cost.

Funisia dorothea Droser in Droser and Gehling, 2008 is an inferred metazoan-grade tubular organism, endemic to the Ediacara Member, Rawnsley Quartzite, of South Australia (~555–550 Myr), which is characterized by a hollow, elongate body constructed of uniserially repeating modular elements and is one of the most abundantly reported members of the Ediacara biota. Thus, Funisia Droser in Droser and Gehling, 2008 has broad significance for developing understanding of the Ediacara biota and provides a large dataset for testing hypotheses on the biological traits of Ediacaran tubular organisms. This study investigates size changes in Funisia’s modular elements to provide further insight into the paleobiology of this organism through the development of a holistic growth model. Results demonstrate that growth in Funisia was highly regulated to maintain uniform modular element width along the length of an individual and, thereby, an overall cylindrical form despite increasing module width throughout ontogeny. The growth model proposed here is compared with the pre-established growth model for another modular Ediacaran tubular organism, Wutubus annularis Chen et al., 2014, demonstrating that the two taxa had distinct growth patterns and disparate autecological strategies, despite a shared constructional morphology.

This article argues that the infrastructural and regulatory politics of Accra’s town council in the early twentieth century highlight competing and transforming understandings of ‘neighbour’ and ‘neighbourhood’. British officials and their elite African allies on the town council championed new forms of physical, social and economic infrastructure, which they touted as ‘modern’ improvements that would bring Accra in line with other major cities and improve life for its inhabitants. Accra residents did not reject all reform or innovation, but they did insist that urban development take place on their terms and in ways that would support their interests, informed by indigenous notions of civic virtue, social responsibility, moral community and spatial organization.

Fe-dominant cordierite, the mineral sekaninaite, is relatively rare in calc-alkaline volcanic rocks, with only a handful of recorded localities. The compositionally zoned phenocrysts in the Late Devonian Rubicon Rhyolite in central Victoria, Australia are the most Fe-rich known, with core compositions having Mg# of 10–30. Similar cordierite–sekaninaite (Crd–Skn) phenocrysts occur in: rhyolites and rhyodacites from San Vincenzo and Roccastrada in Tuscany; on Lipari Island in Italy; in the Nefza province in northern Tunisia; and in a newly discovered Devonian rhyolite at Arthurs Seat, Victoria. All show well-developed sector twinning in response to structural ordering during cooling. The Victorian sekaninaite crystals all show strong zonation from Fe-rich cores to rims richer in Mg, i.e. reverse zoning. In contrast, the Italian and Tunisian examples have relatively weak normal zoning. In the Roccastrada and Lipari rocks, a second type of Crd–Skn occurs as turbid fragments and as groundmass crystals, with the latter showing reverse zoning. Reverse zoning in the Rubicon and Arthurs Seat rhyolite phenocrysts and the Lipari groundmass crystals is attributed to the reheating of their host magmas due to interaction, such as mixing, with a higher-temperature magmas prior to eruption. The ranges of Crd–Skn compositions in all volcanic rocks bear no systematic relationship to the bulk compositions of their host rocks. Assuming that the whole-rock compositions approximate the original magmatic liquids, and an initial H2O content of 5 wt.% throughout, enabled a comparison to be made between the relative P–T conditions of most occurrences, apart from Lipari. Results suggest that the Rubicon Rhyolite had the lowest P–T conditions with Roccastrada next, and San Vincenzo the highest. It appears that sekaninaite might be stable in silicic volcanic magmas over a wide range of melt compositions, pressures and temperatures but is favoured for low-Mg# bulk compositions at low P and low T.