We develop the theory of Kim-independence in the context of NSOP$_{1}$ theories satisfying the existence axiom. We show that, in such theories, Kim-independence is transitive and that -Morley sequences witness Kim-dividing. As applications, we show that, under the assumption of existence, in a low NSOP$_{1}$ theory, Shelah strong types and Lascar strong types coincide and, additionally, we introduce a notion of rank for NSOP$_{1}$ theories.

Temporality is important for understanding Hong Kong's postcolonial status since its handover from Britain to China in 1997. This study examines the mediated regimes of postcolonial temporalities in coverage of five anniversaries of the Hong Kong handover (between 1998 and 2020) in Chinese and British newspapers. In 1998, the Chinese and British press shared a significant consensus regarding the “legitimate continuity” of Hong Kong's colonial legacies; however, this consensus was increasingly undermined by ideological contestations surrounding the city's postcolonial ruptures and differences. The multiple temporal claims that emerged in Chinese and British newspapers were systemized within a proposed framework that combined temporal modes (the “formal structures” of temporal relations) and ideological appraisals (the “general politics” where temporal modes are (il)legitimized and (ab)normalized). The temporal complexity concerning Hong Kong exemplifies the former colony's dilemmatic “in-betweenness” and temporal inconclusiveness, which create an open discursive space that invites ideological investments by powerful symbolic stakeholders.

This article presents a preliminary, revised life history of Punta Laguna, Yucatan, Mexico, and considers in detail the site's relationship to nearby communities. More specifically, this article presents the results of a type-variety analysis of the cumulative palimpsest of ceramics excavated at the site between 2017 and 2022. Unlike initial studies conducted in the 1980s, the current study suggests that Maya peoples occupied Punta Laguna continuously or recurringly from 600/300 b.c. through a.d. 1500/1550. Punta Laguna is therefore usefully understood as a persistent place. By offering a composite life history of Punta Laguna, this article aims to augment current understandings of the complex social, political, and economic landscape of the northeastern Yucatan Peninsula. It also considers the utility of archaeological studies of persistent places to scholarship on urban sustainability and suggests that research investigating the connections between early occupation and site longevity may prove a fruitful avenue of study. Finally, this article argues that investigations of persistent places may provide a counterweight to the more common focus on collapse and thereby offer a more comprehensive understanding of the Maya past—one that emphasizes the vitality of the Maya present.

We extend a recent argument of Kahn, Narayanan and Park ((2021) Proceedings of the AMS 149 3201–3208) about the threshold for the appearance of the square of a Hamilton cycle to other spanning structures. In particular, for any spanning graph, we give a sufficient condition under which we may determine its threshold. As an application, we find the threshold for a set of cyclically ordered copies of $C_4$ that span the entire vertex set, so that any two consecutive copies overlap in exactly one edge and all overlapping edges are disjoint. This answers a question of Frieze. We also determine the threshold for edge-overlapping spanning $K_r$-cycles.

We prove that if a unimodular random graph is almost surely planar and has finite expected degree, then it has a combinatorial embedding into the plane which is also unimodular. This implies the claim in the title immediately by a theorem of Angel, Hutchcroft, Nachmias and Ray [2]. Our unimodular embedding also implies that all the dichotomy results of [2] about unimodular maps extend in the one-ended case to unimodular random planar graphs.

This paper describes the methodology used to analyse oscillations of foils of a wide range of aspect ratios, 0.5 ≤ AR ≤ 4, and Reynolds numbers, 104 ≤ Re ≤ 105, for energy harvesting purposes. The foils were fixed at their trailing edge, and their dynamical behaviour was captured as the wind speed was varied. The foil response was then analysed as a function of velocity, Reynolds number, oscillation amplitude and frequency. Additionally, the forces and moments acting on the foils were measured, utilising an aerodynamic scale, designed and built in-house. An empirical power generation equation was derived to determine the foil characteristics for maximum energy harvesting production. The results show that a flexible foil with AR = 3 with oscillations in the large-amplitude regime is the most effective for energy harvesting.

Supervised machine learning is an increasingly popular tool for analyzing large political text corpora. The main disadvantage of supervised machine learning is the need for thousands of manually annotated training data points. This issue is particularly important in the social sciences where most new research questions require new training data for a new task tailored to the specific research question. This paper analyses how deep transfer learning can help address this challenge by accumulating “prior knowledge” in language models. Models like BERT can learn statistical language patterns through pre-training (“language knowledge”), and reliance on task-specific data can be reduced by training on universal tasks like natural language inference (NLI; “task knowledge”). We demonstrate the benefits of transfer learning on a wide range of eight tasks. Across these eight tasks, our BERT-NLI model fine-tuned on 100 to 2,500 texts performs on average 10.7 to 18.3 percentage points better than classical models without transfer learning. Our study indicates that BERT-NLI fine-tuned on 500 texts achieves similar performance as classical models trained on around 5,000 texts. Moreover, we show that transfer learning works particularly well on imbalanced data. We conclude by discussing limitations of transfer learning and by outlining new opportunities for political science research.

This article interrogates the concept of legal pluralism, as it currently tends to function within contemporary legal and historical scholarship. It argues that the concept of legal pluralism cannot ‘liberate’ positivist analytical legal theory from monist (municipal, state-centric, etc.) straightjackets, but rather itself presumes the primacy of centralized state-issued law—at the same time as masking that primacy within a pluralist discourse. The concept of legal pluralism should be properly understood—and analyzed—as part of the mythology of modern law, not as an alternative to it. The first two sections develop this argument via a critical tour of legal-pluralist historiography, focusing on 1986 to the present day. The final section then moves on to explore what is at stake for the pre-modern historian when they apply (modern) concept(s) of legal pluralism to try to explain the multiplicity of legal orders that they invariably encounter in their own source material.

A standard text-as-data workflow in the social sciences involves identifying a set of documents to be labeled, selecting a random sample of them to label using research assistants, training a supervised learner to label the remaining documents, and validating that model’s performance using standard accuracy metrics. The most resource-intensive component of this is the hand-labeling: carefully reading documents, training research assistants, and paying human coders to label documents in duplicate or more. We show that hand-coding an algorithmically selected rather than a simple-random sample can improve model performance above baseline by as much as 50%, or reduce hand-coding costs by up to two-thirds, in applications predicting (1) U.S. executive-order significance and (2) financial sentiment on social media. We accompany this manuscript with open-source software to implement these tools, which we hope can make supervised learning cheaper and more accessible to researchers.

Language learner anxiety—and emotions in general—has constantly attracted academic attention in the second language acquisition (SLA) field for almost 40 years (Plonsky et al., 2022). However, within the context of the foreign language classroom, epistemic emotions remain understudied, despite their demonstrated effects on performance (D'Mello et al., 2014) and learners’ cognitive processes (Muis et al., 2018a). Epistemic emotions are academic emotions that “relate to knowledge-generating qualities of cognitive tasks and activities” (Pekrun et al., 2017, p. 1268). Their object focus lies in the generation of knowledge (Vogl et al., 2019a) and therefore are prominent during learning activities in academic settings. Recent research in SLA shows that epistemic emotions play a considerable role in instructed language learning (Fraschini, 2023; Nakamura et al., 2022). This current study analyses how two common epistemic emotions—epistemic anxiety and curiosity—mediate the link between a learner's perceived value and intended effort. Empirical data was collected using a tailor-designed survey administered to learners of Korean as a foreign language enrolled in a hybrid university course. Results show that epistemic anxiety and curiosity are independent of each other and coexist during language learning tasks. Furthermore, both epistemic emotions significantly correlate to a learner's perceived value of language learning, with opposite effects. While learners with a higher perceived value tend to be more curious, they also appear less anxious. These results are further discussed considering teachers’ and learners’ characteristics and in relation to theoretical and pedagogical implications for the language classroom.

The wider case presented by Hanscam and Buchanan (2023), as I understand it, is for archaeologists to consider directly the relation of the past in shaping social and political narratives in the present. I agree that this should happen; I contend it is productively happening already. It is a stretch to argue that the misinterpretation of Hadrian's Wall has been a substantive tool for political justification of US-Mexico border policy, or that archaeologists should make a comparison between such sites just in case someone tries to do so. I am interested in having a conversation about the history of bordering regimes, but why would we make a connection that might be misused in order to clarify that these are not good cases for comparison, beyond that both are walls? In relation to the authors’ problem statement that history is being misused to justify the present, it is notable that the one quotation cited observing a relationship between Hadrian's Wall and present-day US-Mexico border barriers is from The New Yorker—hardly a bastion of jingoistic politics or a go-to source of journalism for the political right. Moreover, the quote expressed caution against making a comparison between Hadrian's wall and contemporary border walling projects.

Alweiss, Lovett, Wu, and Zhang introduced $q$-spread hypergraphs in their breakthrough work regarding the sunflower conjecture, and since then $q$-spread hypergraphs have been used to give short proofs of several outstanding problems in probabilistic combinatorics. A variant of $q$-spread hypergraphs was implicitly used by Kahn, Narayanan, and Park to determine the threshold for when a square of a Hamiltonian cycle appears in the random graph $G_{n,p}$. In this paper, we give a common generalization of the original notion of $q$-spread hypergraphs and the variant used by Kahn, Narayanan, and Park.

This article takes up the short work of fiction Salam, written in Japanese in 2006 by Shirin Nezammafi, and deploys it as a primary source in the history of the Japanese present. Salam tells the tale of Layla, an Afghan migrant detained in and then expelled from Japan in 2001. The article argues that Salam exposes the unmaking of postcolonial Japan: if postcolonial Japan meant a territorial, sovereign nation-state built on hegemonic national myths, then now it is unsustainable. Salam calls to an inevitable if uncharted post-national, post-territorial future. To advance this argument, the article focuses on Nezammafi's treatment of three humanistic categories tied up with geopolitical territoriality: language, art, and gender. These categories, when associated with the nation-state, generate irony in Salam. That irony stems from the anachronism of nations: territorial nations, Japanese or otherwise, appear as past entities that have outlived their possibility.

Fluorbritholite-(Nd), ideally Ca2Nd3(SiO4)3F, has been approved by the International Mineralogical Association (IMA2023–001) and constitutes a new member of the britholite group of the apatite supergroup. It occurs in skarn from the Malmkärra iron mine, Norberg, Västmanland (one of the Bastnäs-type deposits in Sweden), associated with calcite, dolomite, magnetite, lizardite, talc, fluorite, baryte, scheelite, gadolinite-(Nd) and other REE minerals. Fluorbritholite-(Nd) forms anhedral and small grains, rarely up to 250 μm across. They are brownish pink and transparent with a vitreous to greasy lustre. The mineral is brittle, with an uneven or subconchoidal fracture and lacks a cleavage. In thin section, the mineral is nonpleochroic, uniaxial (–). Dcalc = 4.92(1) g⋅cm−3 and ncalc = 1.795. The empirical chemical formula from electron microprobe (WDS) point analyses is (Ca1.62Nd0.97Ce0.83Y0.52Sm0.30Gd0.23Pr0.17La0.16Dy0.11Er0.03Tb0.03Ho0.01Yb0.01)Σ4.99(Si2.92P0.08As0.01)Σ3.01O12.00[O0.48F0.26(OH)0.14Cl0.10Br0.02]Σ1.00. The crystal structure of fluorbritholite-(Nd) was refined from single-crystal X-ray diffraction data to R1= 0.043 for 704 unique reflections. It belongs to the hexagonal system, space group P63/m, with unit cell parameters a = 9.5994(3), c = 6.9892(4) Å and V = 557.76(5) Å3 for Z = 2. Fluorbritholite-(Nd) and other britholite-group minerals are a major sink for neodymium in REE-bearing skarns of Bastnäs type.

Retirement timing is an issue of great political importance these days. Policy-makers develop various initiatives encouraging workers to postpone retirement beyond the statutory retirement age. This effort brings, however, just minimal outcomes. Although increasing opportunities and abilities to work in old age, in some countries people tend to retire as soon as it is possible. In economic terms, they make suboptimal (irrational) decisions.