There is renewed interest in direct-drive inertial confinement fusion, following the milestone December 2022 3.15 MJ ignition result on the National Ignition Facility. A key obstacle is the control of the two-plasmon decay instability. Here, recent advances in inhomogeneous turbulence theory are applied to the broadband parametric instability problem for the first time. A novel dispersion relation is derived for the two-plasmon decay in a uniform plasma valid under broad-bandwidth laser fields with arbitrary power spectra. The effects of temporal incoherence on the instability are then studied. In the limit of large bandwidth, the well-known scaling relations for the growth rate are recovered, but it is shown that the result is more sensitive to the spectral shape of the laser pulse rather than to its coherence time. The range of wavenumbers of the excited plasma waves is shown to be substantially broadened, suggesting that the absolute instability is favoured in regions further away from the quarter critical density. The intermediate-bandwidth regime is explored numerically – the growth rate is reduced to half its monochromatic value for laser intensities of $10^{15} \ \text {W}\ \text {cm}^{-2}$ and relatively modest bandwidths of $5 \ \text {THz}$. The instability-quenching properties of a spectrum of discrete lines spread over some bandwidth have also been studied. The reduction in the growth rate is found to be somewhat lower compared with the continuous case but is still significant, despite the fact that, formally, the coherence time of such a laser pulse is infinite.

This article examines how classical music students understand early twentieth-century recordings in higher music education. A qualitative research method was chosen to investigate the beliefs and self-reported practices of 16 students enrolled in a European conservatoire, whose attitudes were considered through the administration of a semi-structured questionnaire and an interview. Their responses identified seven main themes: (1) beliefs, (2) sources, (3) self-reported practices, (4) repertoires/performers, (5) educational implications, (6) limits and (7) benefits.

Results show how much students value early twentieth-century recordings – especially when it comes to analysing the performance practices of the past and developing new interpretations – and how articulate their responses can be with regard to specific stylistic and technical issues. However, possibly due to informal learning strategies and the lack of curricular teaching activities focusing on listening to and analysing recorded interpretations, some responses highlighted a misrepresentation of our recent musical past and the need for a more structured curricular activity. This last should benefit from a vast body of scholarly literature whose relevance is still underestimated among music practitioners.

We realise Buchweitz and Flenner’s semiregularity map (and hence a fortiori Bloch’s semiregularity map) for a smooth variety X as the tangent of a generalised Abel–Jacobi map on the derived moduli stack of perfect complexes on X. The target of this map is an analogue of Deligne cohomology defined in terms of cyclic homology, and Goodwillie’s theorem on nilpotent ideals ensures that it has the desired tangent space (a truncated de Rham complex).

Immediate consequences are the semiregularity conjectures: that the semiregularity maps annihilate all obstructions, and that if X is deformed, semiregularity measures the failure of the Chern character to remain a Hodge class. This gives rise to reduced obstruction theories of the type featuring in the study of reduced Gromov–Witten and Pandharipande–Thomas invariants. We also give generalisations allowing X to be singular, and even a derived stack.

Humanities research is underfunded, and the institutional sources and intellectual effects of this underfunding are insufficiently appreciated. The paper gives an example of the negative effects of a humanities discipline’s lack of research infrastructure on scholarly work. Section 2 describes the main categories through which research funds arrive on U.S. campuses. Section 3 describes the disproportions between Science & Engineering (S&E or “STEM”) funding and funding for social and cultural disciplines. Section 4 discussions the “institutional funds” that universities use to cover research costs from their own pockets. Section 5 shows that universities do not use their institutional funds to compensate for inequities in humanities funding but to perpetuate them. Section 6 claims that the current state of humanities funding abridges academic freedom and calls on humanities administrative personnel to lead a national campaign to rectify the current situation. Misconceptions about humanities research and its funding must be openly acknowledged and addressed so that it can come to have public effects that reflect its actual intellectual achievements.

Regulatory norms, rules, and arrangements enshrined in and established by EU pharmaceutical law travel internationally and influence foreign legal systems, regulatory practices, pharmaceutical company conduct, health systems’ functioning, and ultimately patient access to medicines and human health worldwide. This paper applies the mechanisms of Europeanisation (conditionality, socialisation, externalisation, and mimicry) to explain how these EU norms, rules and arrangements are diffused globally, with a focus on developing economies. Using the ongoing revision of the EU’s pharmaceutical legislation as a case study, this paper selects three innovative legislative proposals therein (i.e. environmental risk assessments for antimicrobials; reporting of public funding for medicines R&D; revised clinical test data and market protection, including a transferrable exclusivity voucher). Through the lens of Europeanisation, this paper postulates how these three legislative proposals, if adopted, would travel globally to developing economies, under which conditions, and with which likely impacts. This paper addresses several gaps in the literature, namely by introducing a global lens to the existing analyses of the EU’s revision of pharmaceutical law, by revealing the theory behind the emerging evidence of the EU’s influence over global pharmaceutical markets, and by positioning the case of pharmaceutical regulation in low- and middle-income countries among the scholarship on the global regulatory influence of EU internal market law.

Vallisneria × pseudorosulata S. Fujii & M. Maki is an invasive aquatic weed that has recently become a major issue within the U.S. Southeast. Vallisneria × pseudorosulata is a hybrid between two nonnative eelgrass species (Vallisneria spiralis L. and Vallisneria denseserrulata Makino) and has rapidly overtaken water bodies in Tennessee, Alabama, and Florida. This hybrid can reproduce rapidly through offshoot formation and floating propagules capable of drifting large distances before establishing. Vallisneria × pseudorosulata has been previously found in Japan and is thought to have been introduced in the United States by the aquarium trade or through dumping.

Quasigeodesic behavior of flow lines is a very useful property in the study of Anosov flows. Not every Anosov flow in dimension three is quasigeodesic. In fact, until recently, up to orbit equivalence, the only previously known examples of quasigeodesic Anosov flows were suspension flows. In a recent article, the second author proved that an Anosov flow on a hyperbolic 3-manifold is quasigeodesic if and only if it is non-$\mathbb {R}$-covered, and this result completes the classification of quasigeodesic Anosov flows on hyperbolic 3-manifolds. In this article, we prove that a new class of examples of Anosov flows are quasigeodesic. These are the first examples of quasigeodesic Anosov flows on 3-manifolds that are neither Seifert, nor solvable, nor hyperbolic. In general, it is very hard to show that a given flow is quasigeodesic and, in this article, we provide a new method to prove that an Anosov flow is quasigeodesic.

We demonstrated a high-power, high-energy regenerative amplifier (RA) based on Yb-doped CaGdAlO4 (Yb:CALGO) crystal, which achieves a maximum average power exceeding 50 W at a repetition rate greater than 50 kHz, and a maximum pulse energy of approximately 7 mJ at a repetition rate of up to 5 kHz. After compression, 130 fs pulses with a peak power of nearly 45 GW are achieved. To the best of our knowledge, this represents the highest average power and pulse energy reported for a Yb:CALGO RA. The RA cavity is specifically designed to maintain excellent stability and output beam quality under a pumping power of 380 W, resulting in a continuous-wave output power exceeding 70 W. For the seeder, a fiber laser utilizing a nonlinear amplification process, which yields a broadband spectrum to support approximately 80 fs pulses, is employed for the high-peak-power pulse generation.

In this paper, I propose an analysis for tonal alternations at the prefix–stem boundary in Tenyidie (Angami), where Mid tones in prefixes and stems dissimilate. I argue that this alternation is driven by the OCP (Obligatory Contour Principle) (Leben 1970) of Mid tones. However, sequences of Mid tones are seen elsewhere. I claim that this asymmetry can be solved with recourse to prosodic phonology (Nespor & Vogel 1986/2007). By assuming that stem and suffix form a prosodic word, excluding prefix, I argue that Mid tones fuse within the prosodic constituent to avoid OCP-Mid. The same constraint also triggers dissimilation across the prefix–stem environment, because of prohibition of fusion across prosodic boundaries. This is an example of phonological conspiracy where multiple processes work together to repair or avoid a single marked structure (Kisseberth 2011).

Substance use and substance use disorders run in families. While it has long been recognized that the etiology of substance use behaviors and disorders involves a combination of genetic and environmental factors, two key questions remain largely unanswered: (1) the intergenerational transmission through which these genetic predispositions are passed from parents to children, and (2) the molecular mechanisms linking genetic variants to substance use behaviors and disorders. This article aims to provide a comprehensive conceptual framework and methodological approach for investigating the intergenerational transmission of substance use behaviors and disorders, by integrating genetic nurture analysis, gene expression imputation, and weighted gene co-expression network analysis. We also additionally describe two longitudinal cohorts — the Brisbane Longitudinal Twin Study in Australia and the Lifelines Cohort Study in the Netherlands. By applying the methodological framework to these two unique datasets, our future research will explore the complex interplay between genetic factors, gene expression, and environmental influences on substance use behaviors and disorders across different life stages and populations.

Climate change law faces a serious implementation problem. New instruments promoted by states from the Global North to address the implementation gap come from the sphere of trade and supply chain regulation. This article focuses on corporate climate due diligence legislation and its potential contribution to fulfilling the objectives outlined in the Paris Agreement. By examining the EU’s legislative process towards adopting a Corporate Sustainability Due Diligence Directive (CSDDD), it explores various approaches to regulating the climate impacts of corporations, including along global supply chains. The article critiques both the ultimately adopted climate transition planning requirement and the European Parliament’s alternative proposal, which aimed to incorporate climate mitigation into the general due diligence framework of the Directive but was unsuccessful. It applies two overarching critiques, termed ‘not enough’ and ‘regulatory imperialism’, to the specific context of corporate climate due diligence. Although these critiques may initially appear contradictory, the article endeavours to reconcile them through a compromise approach that fosters greater participation, integrates measures to mitigate impacts on self-determination, and specifies the obligations imposed on corporations regarding climate mitigation. Finally, the article discusses the idea of a decentralised enforcement regime and highlights the importance of regulation in states of the Global South to achieve a truly planetary legal order on corporate climate accountability.

An analytical expression for the focal intensity of a laser pulse was obtained for an asymmetric out-of-plane compressor with gratings of arbitrary surface shape. The focal intensity is most strongly affected by the linear angular chirp caused by the spatial shift of different frequencies on the second and third gratings. The chirp can be eliminated by simply rotating the fourth grating by an optimal angle, which significantly reduces the requirements for the grating quality. It is shown that the decrease in the focal intensity depends on the product of the grating surface root mean square and pulse spectrum bandwidth. With low-quality gratings, spectrum narrowing would not reduce focal intensity; contrariwise, it may even slightly increase it.

The digital revolution has transformed the dissemination of messages and the construction of public debate. This article examines the disintermediation and fragmentation of the public sphere by digital platforms. Disinformation campaigns, that aim at assuming the power of determining a truth alternative to reality, highlight the need to enhance the traditional view of freedom of expression as negative freedom with an institutional perspective. The paper argues that freedom of expression should be seen as an institution of freedom, an organizational space leading to a normative theory of public discourse. This theory legitimizes democratic systems and requires proactive regulation to enforce its values.

Viewing freedom of expression as an institution changes the role of public power: this should not be limited to abstention but instead has a positive obligation to regulate the spaces where communicative interactions occur. The article discusses how this regulatory need led to the European adoption of the Digital Services Act (DSA) to correct DPs through procedural constraints. Despite some criticisms, the DSA establishes a foundation for a transnational European public discourse aligned with the Charter of Fundamental Rights and member states’ constitutional traditions.

In this short note I query not so much the use of the word ‘vikings’ or the fraught question of whether it should be capitalised, but rather whether ‘the Vikings’ is a useful concept that helps us understand history, or whether it creates an inaccurate essentialist category for which there is no historical evidence. The piece argues for more nuance and specificity when dealing with Scandinavia and the Scandinavian diaspora in our period, and argues that the variety of phenomena across times and space warrants more serious consideration. The time has come to ditch this twentieth-century concept and to return to the sources.

This paper explores the integration of haptic gloves and virtual reality (VR) environments to enhance industrial training and operational efficiency within the framework of Industry 4.0 and Industry 5.0. It examines the alignment of these technologies with the Sustainable Development Goals (SDGs), mainly focusing on SDG 8 (Decent Work and Economic Growth) and SDG 9 (Industry, Innovation, and Infrastructure). By incorporating a human-centric approach, the study leverages haptic gloves to provide realistic feedback and immersive experiences in virtual training environments. The gloves enable intuitive interaction, enhancing the training efficacy and reducing real-world operational errors. Using the 5S principles—Social, Sustainable, Sensing, Smart, and Safe—this research evaluates the system’s impact across various dimensions. The findings indicate significant improvements in user comfort, productivity, and overall well-being, alongside enhanced sustainability and operational efficiency. However, challenges related to realistic hand-object interactions and algorithmic enhancements were identified. The study underscores the importance of continuous improvement and cross-disciplinary collaboration to advance the usability and effectiveness of these technologies. Future research should focus on customization, AI-driven adaptability, sustainability, real-world scalability, and comprehensive impact assessment to further develop smart interfaces in industrial settings. This integration represents a transformative opportunity to enhance workplace safety, skills development, and contribute to global sustainable development goals.

We provide a characterization of differentially large fields in arbitrary characteristic and a single derivation in the spirit of Blum axioms for differentially closed fields. In the case of characteristic zero, we use these axioms to characterize differential largeness in terms of being existentially closed in the differential algebraic Laurent series ring, and we prove that any large field of infinite transcendence degree can be expanded to a differentially large field even under certain prescribed constant fields. As an application, we show that the theory of proper dense pairs of models of a complete and model-complete theory of large fields, is a complete theory. As a further consequence of the expansion result we show that there is no real closed and differential field that has a prime model extension in closed ordered differential fields, unless it is itself a closed ordered differential field.