This article presents a novel sense in which theoretical structure has been preserved across the transition from classical to quantum physics. I import mathematical tools from category theory that have been used for structural comparisons in the context of theoretical equivalence and apply these tools to new situations involving theory change. The structural preservation takes the form of a categorical equivalence between categories of models of classical and quantum physics. I situate the significance of this structural preservation in terms of prospects for theory construction in quantum physics.

This study highlights key players for COVID-19 in Brazil, Peru, Colombia, Chile, Argentina, and Ecuador by employing social network analysis for Twitter. This study finds that key players in Latin America play various roles in COVID-19 social networks, differing from country to country. For example, Brazil has no Latin key players, whereas Colombia and Ecuador have 8 Latin key players in the top 10 key players. Secondly, the role of governmental key players also varies across different countries. For instance, Peru, Chile, Argentina, and Ecuador have the governmental key player as the top key player, whereas Brazil and Colombia have the news media key player as the first. Thirdly, each country shows different social networks according to groups. For instance, Colombia exhibits the most open social networks among groups, whereas Brazil shows the most closed social networks among the 6 Latin countries. Fourthly, several top tweeters are common across the 6 Latin American countries. For example, Peru and Colombia have caraotadigital (Venezuelan news media), and Chile and Argentina have extravzla (Venezuelan news media) as the top tweeter.

A new dalmanitid trilobite is described from the early Silurian (Telychian) Waukesha Biota in Wisconsin, USA, best known for its variety of exceptionally preserved arthropods. Waukeshaaspis eatonae new genus new species is the most common trilobite found in the Waukesha Biota, numbering ~200 specimens, allowing a thorough description of the dorsal exoskeleton. This new taxon has a combination of characters unique to the Dalmanitidae, including a distinct embayment on the posterior margin of the pygidium. Embayments are rare for dalmanitids, most species having instead a caudal spine. The lengthening of the genal spines might have served a similar function to that which a caudal spine would have served, allowing the embayment to fulfill a different function, related to keeping an opening when enrolled. The abundance at the preservation site suggests physiological tolerance at the habitation site.

UUID: http://zoobank.org/50a214e3-72f0-4ca2-b8f1-4ad4460bc1d4

This essay analyses the Holy See's engagement in the postwar discourse surrounding displaced minors by focusing on the case of displaced Italian children from Libya. Separated from their families and evacuated to Italy at the onset of the Second World War, they were placed in Italian Youth of the Lictor (Gioventù Italiana del Littorio; GIL) camps. In the aftermath of the war, these displaced children petitioned to return to their families who had remained in territories no longer part of the Italian empire. This article shows how the Papal Aid Committee for Assisting Refugees took part in the relocation efforts and contributed to the conversation on family reunification. By navigating postwar aid and forming unexpected alliances, the Holy See not only contributed to reshaping Italy's geopolitical presence in the Mediterranean but also solidified conservative family norms within the international discussion on humanitarianism.

Duchenne muscular dystrophy is characterised by fibrofatty replacement of muscle, resulting in dilated cardiomyopathy. Hypertrophic cardiomyopathy affects 1:200–1:500 people and is characterised by asymmetric ventricular septal hypertrophy. To date, there have been two separately reported cases describing the combined pathology of these disorders. Herein, we expand upon these reports with a case series describing longitudinal findings in three patients with Duchenne muscular dystrophy who developed hypertrophic cardiomyopathy.

In this study, we approximately replicated Papi and Khajavy’s (2021) investigation into the regulatory focus in second language acquisition, applying their approach to a significantly larger cohort of 855 Chinese second language (L2) learners. In contrast with the original study, our research employed the College English Test Band 4 (CET-4), a standardized English test, to better align with the Chinese educational context. This methodological shift allowed for a nuanced exploration of the regulatory focus’s role in language learning among Chinese students. Our results predominantly reinforce the crucial role of regulatory focus in language learning, echoing Papi and Khajavy’s findings. We discovered notable parallels in how promotion positively influences ideal own and ideal other, and how prevention negatively impacts ought own and ought other. However, a unique finding of our study was the stronger impact of ought selves on L2 anxiety and enjoyment in the Chinese context. This highlights the nuanced influence of socioeducational environments on regulatory focus strategies, suggesting contextual variability in language learning strategies.

The liver has multiple functions such as detoxification, metabolism, synthesis and storage. Folate is a water-soluble vitamin B9, which participates in one-carbon transfer reactions, maintains methylation capacity and improves oxidative stress. Folic acid is a synthetic form commonly used as a dietary supplement. The liver is the main organ for storing and metabolising folate/folic acid, and the role of folate/folic acid in liver diseases has been widely studied. Deficiency of folate results in methylation capacity dysfunction and can induce liver disorders. However, adverse effects of excessive use of folic acid on the liver have also been reported. This review aims to explore the mechanism of folate/folic acid in different liver diseases, promote further research on folate/folic acid and contribute to its rational clinical application.

This article delves into the doctrine of inherent powers within the Sudanese Civil Procedure Code, with a specific focus on its origin, nature and scope. It posits that this doctrine empowers the courts to undertake actions essential for fulfilling their duties and ensuring the pursuit of justice, even in instances where such powers are not explicitly granted to them under statutory provisions. Additionally, the article examines the potential advantages and disadvantages associated with inherent powers and contemplates whether their exercise might pose a threat to the rule of law. It also explores the arguments both in favour of and against the possibility of rule-making within the framework of these powers and the potential impact of such regulations on the administration of justice. The article asserts that while a court's inherent powers are indispensable for the efficient dispensation of justice, it is imperative that they are not wielded capriciously or arbitrarily. Instead, their exercise should be guided by the principles of equity and good conscience.

This paper presents the novel concept of a singularity-free tube (SFT) in the constant orientation workspace of a spatial parallel manipulator. The concept is developed and demonstrated in the context of a $6$-$6$ spatial parallel manipulator, namely, the semi-regular Stewart platform manipulator. Given two points in the said workspace, the SFT is a tubular volume which contains these points and is free of gain-type or forward-kinematic singularities. The purpose of identifying such regions in space is to allow abundant freedom to the path-planner to connect the said points by a path, which can be free of gain-type singularities simply by remaining inside the SFT at all times. To demonstrate the concept, two smooth paths obtained by formulating two different optimisation problems have been presented as examples. The SFT can be of great help in singularity-free path-planning in many similar manipulators.

Let $f(z)=z^2+c$ be an infinitely renormalizable quadratic polynomial and $J_\infty $ be the intersection of forward orbits of ‘small’ Julia sets of its simple renormalizations. We prove that if f admits an infinite sequence of satellite renormalizations, then every invariant measure of $f: J_\infty \to J_\infty $ is supported on the postcritical set and has zero Lyapunov exponent. Coupled with [13], this implies that the Lyapunov exponent of such f at c is equal to zero, which partly answers a question posed by Weixiao Shen.

By appealing to public concern over environmental issues, Green parties have emerged to gain secure positions in several party systems. However, in Canada, we know very little about why people support the Green Party. This research note draws upon the Canadian Election Study (CES) to explore the ways in which demographic factors, personality traits and individual environmentalism impact vote choice. Theorizing Green Party support as a form of pro-environmental behaviour, we build a model that tests the impact of demographic factors and personality traits as mediated through environmental attitudes. It finds that, while pro-environmental policy attitudes are the strongest predictor of Green Party support, several demographic factors and personality traits—specifically conscientiousness, openness to experience, agreeableness and extraversion—have an effect.

This article proposes a re-examination of one of the most controversial cases of reparations: the Treaty of Versailles. By focusing on Article 238, which stipulated the restitution of objects stolen or displaced by the German army during the First World War, we can see that the treaty helped to solidify norms concerning the protection of civilian property in wartime and gave civilians a right to have a voice in international law. However, the process of restitution was beset with both practical and political challenges and its success hinged on the role of public authorities, the nature of the objects returned and the impact of social class dynamics. Through this study, we are able to gain a more nuanced understanding of the possibilities of restitution, its potential as well as its limitations.

We introduce non-associative skew Laurent polynomial rings and characterize when they are simple. Thereby, we generalize results by Jordan, Voskoglou, and Nystedt and Öinert.

This article critically evaluates Jeffrey Koperski’s decretalism, which presents the laws of nature as divine decrees functioning as constraints rather than dynamic forces. Building on his work, we explore whether his model successfully avoids the implications of occasionalism, as he claims. By analysing his latest publications, we first reconstruct Koperski’s argument and then present three key objections. These include (1) issues related to scientific realism, (2) the principle of simplicity, and (3) the reduction of Koperski’s model to occasionalism. We argue that despite his attempts to distinguish his framework, Koperski’s model ultimately collapses into occasionalism due to the continuous divine sustenance required for natural processes. By engaging with recent developments in metaphysical and scientific debates, this article highlights the limitations of Koperski’s decretalism.