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A classical and central problem in the theory of water waves is to classify parameter regimes for which non-trivial solitary waves exist. In the two-dimensional, irrotational, pure gravity case, the Froude number $ \textit{Fr}$ (a non-dimensional wave speed) plays the central role. So far, the best analytical result $ \textit{Fr} \lt \sqrt {2}$ was obtained by Starr (1947 J. Mar. Res., vol. 6, pp. 175–193), while the numerical evidence of Longuet-Higgins & Fenton (1974 Proc. A, vol. 340, pp. 471–493) states $ \textit{Fr} \leq 1.294$. On the other hand, as shown recently by Kozlov (2023 On the first bifurcation of Stokes waves), the hypothetical upper bound $ \textit{Fr} \lt 1.399$ is related to the existence of subharmonic bifurcations of Stokes waves. In this paper, we develop a new strategy and rigorously establish the improved upper bound $ \textit{Fr} \lt 1.3451$, which is the first rigorous improvement of Starr’s bound. In this process, we establish several new inequalities for the relative horizontal velocity, which are of separate interest and for which we delicately make use of the bound on the slope of the surface profile established by Amick (1987 Arch. Ration. Mech. Anal., vol. 99, pp. 91–114). As an application we show that the velocity at the bottom below the crest of any solitary wave does not exceed $47\,\%$ of the propagation speed.
Over the past 5 years, the policy constraint posed by the sovereign bond market has strengthened. Across the G7, governments have been forced into rapid policy reversals, often due to sharp and unexpected rises in bond yields. The fact that the bond market acts as a constraint on policy—particularly on long-term investment—is well known. What has become apparent is that this market constraint has sharpened and now shapes G7 policymaking outside periods of acute crisis. This paper examines the bond market constraint, and how it has evolved in recent years. The past 5 years have seen a striking evolution, with record levels of G7 debt issued. Focusing on the United States and the United Kingdom, we outline two key empirical puzzles: first, for both, bond yields appear higher than justified by benchmark models; second, in the United Kingdom, yields have become highly (and surprisingly) volatile. We then review candidate explanations for these changes. We posit and examine new forces—demographic shocks, news coverage of fiscal watchdogs, the role of hedge funds and stablecoins. Finally, we use a simple econometric framework to provide a first test of whether these forces may explain bond yields. We find indicative evidence that they do. However, much remains unexplained, suggesting the importance of further work to understand the implications of the higher debt costs across the G7. As part of this analysis, we introduce a new dataset of fiscal watchdog media salience and publication patterns, which we make available to support future research.
Acupuncture is a clinically recognized treatment for major depressive disorder (MDD), but the associations of efficacy with dosage, treatment course, frequency, acupuncture modality, needle retention time, and manipulation remain unclear. This study evaluated the efficacy and safety of acupuncture for MDD and explored potential moderating factors.
Methods
Randomized controlled trials of acupuncture for MDD were searched in CNKI, VIP Database, Wanfang Data, SinoMed, PubMed, Embase, Web of Science, and the Cochrane Library from inception to May 2025. Risk of bias was assessed using RoB 2, and certainty of evidence using GRADE. Data were analyzed in Stata 18.0.
Results
36 trials involving 3843 participants were included. Compared with sham/placebo acupuncture, acupuncture showed greater antidepressant effects (SMD −1.12, 95% CI −1.57 to −0.67, P < 0.01). Very low-quality evidence suggested similar efficacy between acupuncture and antidepressants. Electroacupuncture was superior to manual acupuncture (SMD −0.24, 95% CI −0.42 to −0.07, P < 0.01). High- and moderate-dose acupuncture were more effective than low-dose regimens, and meta-regression suggested a linear dose-response relationship, with 30 sessions as the optimal dosage. Better outcomes were associated with treatment course >6 wk, 3 times weekly, needle retention time of 20–30 minutes, and electroacupuncture. No significant difference was found between needle manipulation and non-manipulation.
Conclusions
Acupuncture significantly alleviates depressive symptoms in MDD. Efficacy appears to be influenced by dosage, acupuncture modality, treatment course, frequency, and needle retention time, with 30 sessions, treatment course > 6 wk, 3 sessions weekly, 20–30 minutes retention, and electroacupuncture showing the most favorable outcomes.
We show that the moduli spaces of Scholze’s p-adic shtukas with framing satisfy a p-adic rigid analytic version of Borel’s extension theorem. In particular, this holds for local Shimura varieties, for all local Shimura data $(G, [b],\{\mu \})$, even for exceptional groups G, and extends work of Oswal-Shankar-Zhu-Patel who proved a p-adic Borel extension property for Rapoport-Zink spaces. As a corollary, we deduce that all these spaces satisfy a p-adic rigid analytic version of Brody hyperbolicity.
Major depressive disorder (MDD), smoking, and drinking frequently co-occur, with evidence suggesting these relationships may differ by sex. However, the direction of causality and the extent of sex-specific associations remain unclear. We investigated sex-specific genetic relationships between MDD and substance use phenotypes using genome-wide association studies (GWAS) from the UK Biobank and publicly available sex-stratified GWAS for MDD and problematic alcohol use (PAU). Causal effects were assessed using bidirectional, sex-stratified Mendelian randomization (MR). We further applied multivariable MR (MVMR) to evaluate the influence of socioeconomic status (SES). Genetic correlation analyses indicated significant shared genetic architecture between MDD and all substance use traits in sex-combined GWAS. In sex-specific analyses, the correlation between cigarettes per day and MDD was significantly stronger in females, and drinks per week were correlated with MDD only in females. MR analyses showed that genetic liability to MDD increased the risk of smoking initiation and PAU in females, and was associated with reduced alcohol drinking frequency in males. In contrast, no tested substance use trait showed evidence of a causal effect on MDD in either sex. MVMR adjusting for SES attenuated the association between MDD and smoking initiation. The effect on PAU in females remained. In males, the negative association between MDD and drinking frequency became non-significant after SES adjustment. These findings reveal sex-specific genetic and causal relationships between smoking, drinking, and MDD, and highlight the role of SES as a potential confounder. Incorporating sex and socioeconomic context is critical when examining these associations.
This article examines a set of important but unpublished shields from Malla, Nepal, discovered in the Patan Palace Complex, by combining philology with the study of material culture. The four shields, which display images of Hindu deities, are the only known instance of inscribed textiles in pre-modern Newar art history. The paper first deciphers the shields’ inscriptions to explain their overall importance for scholarship, and then seeks to uncover their iconographic scheme by studying the objects alongside unpublished liturgical texts in order to prove that they were commissioned for the worship of Ugracaṇḍā, a goddess key to Newar conceptions of kingship. I delve into the provenance and historical background of the shields and explore broader Indic ideas of the divinization of weapons to explain the ritual function and symbolic significance of these objects for royal celebrations. In doing so, we also posit the specific political context behind their creation.
Consecutive $k$-type systems have become important in both reliability theory and applications; in spite of a large literature existing on them, three-dimensional consecutive $k$-type systems have not yet been studied for multi-state case. In this paper, we introduce several different types of multi-state linear three-dimensional consecutive $k$-type systems for the first time, with due consideration to possible overlapping of failure blocks. The finite Markov chain imbedding approach is then used for the derivation of their reliability functions with state spaces and transition matrices provided in a novel way, and the involved computational process is illustrated through several numerical examples. Finally, some possible applications of the work and potential extensions are pointed out.
In her 1983 How to Suppress Women’s Writing, feminist science fiction author Joanna Russ outlined the many approaches used to ignore, condemn, or otherwise belittle the intellectual productions by members of the “wrong” groups.1 In addition to discouragement and blocking access to requisite materials and training, other regular tactics include isolating a given author or one of their texts from the tradition to which they or it belong and simply “ignoring the works, the workers, and the whole tradition,” which Russ considers both most common and most difficult to combat.2 Among the many contributions of Temin’s Remapping Sovereignty is his actively counteracting the ignoring of “the works, the workers, and the whole tradition” by refusing to isolate the six individual North American Indigenous political thinkers who are his focus from the larger, internally diverse, dynamic political worlds of which they are part. Far from monolithic or univocal, what emerges is an intergenerational multi-nation effort to articulate aspirations and concerted action that respond with dignity and power to distinct and overlapping moments in ongoing processes of settler-colonial genocide and dispossession.
This essay explores the formation of the Syria-Turkey border by examining the mobility of contraband merchants and couriers. Contraband commerce can be viewed as not only a technique of mobility but a technology of sovereignty. I parse out these linkages from within the semantic domain of kaçak (contraband; literally “fugitive”) repurposed in the hands of contraband merchants, investigative journalists, and state officials. At important historical junctures, contraband commerce between modern Turkey and Syria came to link regimes of value and territorialization, border delineation and land dispossession, and economic informality and political treason. Analyzing the paradoxically uneven distribution of physical mobility and transborder transactions among the inhabitants of the border as a central tenet of territorialization, I suggest conceptualizing the border as a palimpsest of sovereignty. This essay contends that such an approach recuperates the historicity and dynamism of arrested mobilities and their role in the spatial production of borders, and of other contingent forms they give to sovereignty over geography and history.
This study examines Norwegian veterans’ construction of meaning of the war in Afghanistan with two main objectives. A first aim is to add empirically to research on veterans’ meaning-making, querying into veterans’ construction of meaning after failure in a recent military operation. A thematic analysis of interviews with fifteen veterans illustrates how, despite their own admission of the war’s limited overall achievements, Norwegian veterans rendered the war meaningful. They emphasised that they had done their job, realised themselves as individuals, experienced community, made a difference ‘then and there’, and served their country. Working towards a second aim – to enhance scholarly understanding of civil–military dynamics in relation to veterans’ experiences – the study discusses implications of this meaning-making for Norwegian civil–military relations. Two main arguments are set forth: (1) a significant discrepancy in the construction of meaning among veterans compared to the Norwegian public illustrates a societal–military gap in evaluations of the war and (2) a reciprocal distance between veterans and politics and society demonstrates a weakness in civilian control of the Norwegian Armed Forces. By way of conclusion, the study reflects on consequences of its findings.
Effective conservation of declining migratory species requires identifying habitats used during each stage of the annual cycle and the links between them. The Little Blue Heron Egretta caerulea, a long-legged, colonial-nesting, wading bird species that primarily forages in shallow-water wetlands, is declining throughout much of its range. A lack of understanding of its annual cycle movements prevents identifying when and where populations face limiting pressures, hindering conservation efforts. This study quantifies Little Blue Heron annual cycle movements, including space use at wintering and breeding sites, colony locations, migration distances, phenology, and site fidelity of herons from two important wintering sites on Florida’s Gulf Coast that differ in availability of fresh water. Little Blue Herons tagged with GPS transmitters (n = 30) showed a partial migration strategy; however, the ratio of migrants to residents was substantially different between the two study sites. Additionally, these birds established breeding colonies in both inland (n = 10) and coastal (n = 12) wetlands throughout the south-east USA and western Cuba (n = 2) and travelled a mean of 4.46 (SE = 0.87) km from their colony to forage. About 95% of individuals established colonies within freshwater wetland habitats, regardless of their wintering site, providing support that availability of fresh water during the breeding period is a key element of the habitat for this species. The results of this study suggest that management decisions aimed at minimising the threats to high-value wintering sites will benefit this species. The coastal systems examined supported wintering individuals for at least half of the full annual cycle. During this period, individuals maintained small home ranges (mean = 153.71, SE = 17.4 ha), did not make any significant within-season movements to other locations, and displayed strong inter-year site fidelity (0.49–0.85 BAI overlap), suggesting that these are areas that provide high quality habitats, justifying continued protection.
Joint clinical assessments (JCAs) under the European Union (EU) Regulation 2021/2282 on health technology assessment (HTA-R) and its implementing regulations have been linked to various implementation challenges. However, legal implications of practically relevant issues have mostly remained unexplored. This study investigated potential legal implications of disparities regarding patient population, intervention, comparator, and outcomes (PICOs) in JCAs from respective member states (MSs), and of managing conflicts of interest (CoIs) of experts involved in a JCA. Moreover, we discussed potential consequences for patient access. JCA reports are not legally binding for MS; PICO disparities can underpin the required justification for their non-consideration at national level. Legal action against negative reimbursement decisions due to unjustified non-consideration falls under national jurisdiction. Furthermore, too strict CoI management might leave perspectives of MSs with fewer experts and thus a higher chance of CoI occurrence unheard, requiring corresponding expert elicitation at national level. These implications might lead to an increased workload for health technology developers and national HTA bodies, potentially fostering marketing strategies and access delays. Thorough scoping processes and prioritising the need for a JCA’s scientific excellence could facilitate more streamlined national HTA procedures and accelerated patient access.
Since the 1960s, Third World Approaches to International Law (TWAIL) scholars1 have argued that decolonization requires more than formal sovereignty; it demands equal participation by low- and middle-income countries (LMICs), particularly post-colonial states, in meaningfully shaping the rules of international order. The global health governance system, however, was largely constructed within a post-World War II order and, thus, reproduced rather than dismantled imperial hierarchies. Power and agenda-setting authority remained concentrated in former colonial states, Western hegemonic powers, and newly created international institutions that entrenched asymmetrical decision making. Over the past eight decades, global health governance has thus been disproportionately shaped by Global North actors, limiting the ability of many states to exercise meaningful agency and influence. The result has been a persistent erosion of principles of equitable global health and international law, including a core principle of participation, rooted not in the absence of legal recognition but in the centralized allocation of authority within global health institutions and organizations.2
Feedback is integral to second language (L2) writing instruction. However, large class sizes and limited teacher time often challenge the delivery of personalized feedback, prompting interest in AI-powered solutions such as ChatGPT (Escalante et al., 2023; Huete-García & Tarp, 2024; Steiss et al., 2024; Yoon et al., 2023; Zhang, 2024). This study evaluates a task-customized GPT model, “Belinda,” trained to assess A1-level Spanish learners’ writing and provide feedback. Two research questions guided the investigation: (1) Can Belinda accurately score beginner Spanish writing using a provided rubric? (2) Can Belinda deliver constructive qualitative feedback? Human and GPT-generated scores were compared for inter- and intrarater reliability, and qualitative analyses categorized the feedback for usability in the classroom. Results revealed moderate alignment between Belinda’s scores and human raters, though reliability of the GPT fell short of calibration benchmarks. Feedback quality varied, with Belinda often providing vague, incomplete, or inaccurate suggestions. Despite iterative training, the GPT struggled to balance error correction with encouragement, a critical need for novice learners. Additionally, inconsistencies in identical GPT versions raised concerns about reliability. While Belinda showed potential in automating feedback, its limitations in accuracy, contextual understanding, and positivity suggest it is not yet a viable substitute for human evaluation by itself. These findings emphasize the challenges of integrating AI into L2 instruction and call for the need for extensive datasets, robust training, and human–AI collaboration to achieve pedagogically sound outcomes. Future research should explore hybrid feedback models and scalable solutions to enhance AI’s role in language education without compromising learner progress or confidence.
We examine the “problem of social change”, focusing on whether efforts should be oriented toward long-term ideals or piecemeal improvements. We analyse the trade-off between these approaches: pursuing ideals may require short-term sacrifices, while incremental changes may hinder realizing an ideal. We introduce an analytical framework for structuring thought experiments that can provide traction on these issues, and present two implementations that provide baseline insights and motivate further research. We conclude with suggestions for extending our framework in ways that can yield insights that can guide our choice of orientation.
This article examines representations of the Modern English Speaker of Korean (MESK) in the Oxford English Dictionary (OED), as lexicographers listened to and documented the language of this figure over the past century. I show that, until the early twenty-first century, the most salient type of MESK was the Koreanist, a white, masculine expert on and translator of Korean, the language of a racial other. By contrast, more recent Korean entries, influenced by the global spread of hallyu, have invoked the Korea Fan, a figure that potentially unsettles longstanding ideologies of language, race, and gender. I argue, however, that the dictionary’s techniques of linguistic regimentation continue to represent the MESK, even when expressing Korean fandom, as fundamentally aligned with the Koreanist.
Colonial borderlands provide an opportunity to study innovation of new foodways and persistence of traditional ones amid unfamiliar and potentially risky environments and dynamic cultural contexts. Archaeological research in northern New Spain has revealed foodways diversity as Spaniards attempted to replicate agropastoral systems and Indigenous peoples incorporated, to varying extents, new plants and animals into their culinary practices. These processes remain relatively unknown in Spanish Tejas. Here we present new zooarchaeological data from Mission Dolores in eastern Texas, synthesizing these data with a review of other Tejas missions and presidios. Written records indicate that Mission Dolores occupants struggled to provision themselves and to convert Indigenous Ais but had trade relations with neighboring French. We investigate the nature of the food system, the likelihood of self-provisioning, and culinary processing. We show that cattle were the dominant meat source, and wild fauna were rarely consumed. Mortality profiles indicate slaughter of prime age animals, while skeletal part representation, and three-dimensional visualizations of cut marks, indicate butchery of whole carcasses on site. Our findings contrast with documents implying resource stress at Mission Dolores and unexpectedly show that Mission Dolores occupants were almost solely reliant on ranching, compared with other Tejas missions and presidios.
We develop a weakly nonlinear model of duct acoustics in two and three dimensions (without flow). The work extends the previous work of McTavish & Brambley (2019 J. Fluid Mech., vol. 875, pp. 411–447) to three dimensions and significantly improves the numerical efficiency. The model allows for general curvature and width variation in two-dimensional ducts, and general curvature and torsion with radial width variation in three-dimensional ducts. The equations of gas dynamics are perturbed and expanded to second order, allowing for wave steepening and the formation of weak shocks. The resulting equations are then expanded temporally in a Fourier series and spatially in terms of straight-duct modes, and a multi-modal method is applied, resulting in an infinite set of coupled ordinary differential equations for the modal coefficients. A linear matrix admittance and its weakly nonlinear generalisation to a tensor convolution are first solved throughout the duct, and then used to solve for the acoustic pressures and velocities. The admittance is useful in its own right, as it encodes the acoustic and weakly nonlinear properties of the duct independently from the specific wave source used. After validation, a number of numerical examples are presented that compare two- and three-dimensional results, the effects of torsion, curvature and width variation, acoustic leakage due to curvature and nonlinearity and the variation in effective duct length of a curved duct due to varying the acoustic amplitude. The model has potential future applications to sound in brass instruments. Matlab source code is provided in the supplementary material.