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The polar regions are famous for being inhospitable, difficult to access, and one of the final frontiers for exploration. The late 19th and early 20th centuries were filled with explorers seeking the achievement of being the first person to the Pole. These harrowing stories have action and adventure but lack a critical component: women. Women historically have not played a primary role in polar research or exploration. Many barriers to access existed such as prejudice, lack of education opportunity, and physical restrictions. Today, women have better access to the Antarctic and Arctic for research and research support but still face barriers to equitable participation. A “boys club” environment in stations can lead to women being excluded or subjected to sexual harassment. Despite this, the addition of women is shown to improve team dynamics, morale, and the culture within research stations. Women’s representation in polar research is better today than it’s ever been, yet there is still improvement being made for the future.
After the Great Financial Crisis of 2008, the United States (U.S.) and the European Union (EU) issued new domestic rules across a variety of financial services. Different politics and policy-making processes generated regulatory incompatibilities, and conflicts emerged as each side insisted the other adapt to its approach. Yet our original data covering eleven sub-sectors show that in a predominant cluster of cases, the two jurisdictions had by 2020 made adjustments and adopted integrationist regulation, which fosters cross-jurisdictional interoperability for financial companies through harmonization (increasing similarity and compatibility) or deference (accepting the regulation of other jurisdictions). The pattern has broad and surprising implications for the future of global finance in an era of rising economic nationalism and populist politics. Why, then, did Washington and Brussels move beyond the standoffs? What accounts for the integrationist turn? Our novel explanation features a “mutual accommodation” causal mechanism driven by the development in both jurisdictions of “border-policing” capacities, builds on a new generation of IPE research that is attentive to complexity and temporal process in accounting for global governance outcomes, and provides a pathway for qualitative researchers seeking to balance many new methodological and transparency demands.
The “revolutionary script” of Leninism was foundational to how the African Party for the Independence of Guinea and Cabo Verde (PAIGC) and Amilcar Cabral imagined the course of decolonization. Under-utilized archives and party documents highlight that the impact of the political-organizational model of Lenin was an early source of inspiration for PAIGC leaders, a fact which historians have not investigated in detail. The manner in which Leninism influenced the PAIGC was neither linear nor dogmatic, however. Dating from early exposure to Marxist texts in underground study circles to aborted attempts at launching armed struggle, party leaders constantly improvised upon the script with which they based their anti-colonial revolution.
Parents involved with child protective services (CPS) often face stressors that compromise their parenting; thus, it is critical to identify sources of resilience at multiple ecological levels. This study leveraged cross-sectional data from a study of CPS-involved parent-child dyads (N = 129). Most parents identified as having a minoritized racial/ethnic identity and as having low income. Parent responsive involvement, constructive discipline, and problematic discipline were coded from observations of parent-child interactions when children were approximately 4 years old (M = 4.19 years, SD = .34; 45.7% female). Neighborhood resource availability was assessed using the Childhood Opportunity Index, a publicly available measure of resources in a given census tract. Parental attachment was coded from the Adult Attachment Interview. Greater neighborhood resource availability and secure-autonomous parental attachment were associated with reduced problematic discipline. Additionally, parental attachment moderated the link between neighborhood resource availability and responsive involvement, such that autonomous parents in more resourced neighborhoods demonstrated strengths in positive, warm parenting. These findings highlight the potential of neighborhood resources and secure attachment to strengthen parenting, even in the face of adversity, supporting the resilience of families in marginalized communities.
The dynamics of self-excited shock train oscillations in a back pressured axisymmetric duct was investigated to deepen the understanding of the isolator/combustor coupling in high-speed propulsion systems. The test article consisted of an internal compression inlet followed by a constant area isolator, both having a circular cross-section. A systematic back pressure variation was implemented by using a combination of aerodynamic and physical blockages at the isolator exit. High bandwidth two-dimensional pressure field imaging was performed at $8\,{\rm kHz}$ repetition rate within the isolator for different back pressure settings. The acquisition rate was considerably higher than the dominant frequency of the shock train oscillations across the different back pressure settings. The power spectral density of the pressure fluctuations beneath the leading shock foot exhibited broadband low frequency oscillations across all back pressures that resembled the motions of canonical shock–boundary layer interaction units. A node in the vicinity of reattachment location that originated the pressure perturbations within the separation shock was also identified, which further ascertained that the leading shock low frequency motions were driven by the separation bubble pulsations. Above a threshold back pressure, additional peaks appeared at distinct higher frequencies that resembled the acoustic modes within the duct. However, none of the earlier expressions of the resonance acoustic frequency within a straight duct agreed with the experimentally observed value. Cross-spectral analyses suggested that these modes were caused by the shock interactions with upstream propagating acoustic waves that emanate from the reattachment location, originally proposed for transonic diffusers by Robinet & Casalis (2001) Phys.Fluids13, 1047–1059. Feedback interactions described using one-dimensional stability analysis of the shock perturbations by obliquely travelling acoustic waves (Robinet & Casalis 2001 Phys.Fluids13, 1047–1059) made favourable comparisons on the back pressure threshold that emanated the acoustic modes as well as the acoustic mode frequencies.
Care theorists have had enough. Decades of neoliberalism, followed by financial crisis, austerity, gender backlash, and, in 2020, a worldwide infectious disease pandemic, have clearly tested their patience. The titles alone of three recent books on the ethics and politics of care suggest a change in tone; indeed, “radical,” “revolutionary,” and “manifesto” are generally not words we associate with the scholarship of those interested in the everyday practices of responding to the needs of others. And yet for Maurice Hamington, Lynne Segal, and co-authors Jennifer Nedelsky and Tom Malleson, these quotidian practices, and the ethos that underlies them, are more radical than they seem. Indeed, these volumes suggest that a commitment to care—a commitment that is both ideational/ethical and material—is necessary to usher in the kind of politics we so desperately need today. It could be, then, that with their latest books, these authors are edifying and formalizing what we might call the “radical turn” in research on care—a turn that can be roughly said to have begun in 2020 with the Care Collective’s The Care Manifesto (Verso) and the parallel Care Manifesto (Femnet) written by and for women of Africa, Asia, and Latin America a year later.
Over the past two decades, political science has produced varied examples of ethnographic approaches. These approaches have not only tackled epistemological dilemmas but also exposed a second methodological dimension of ethnographic practice that is not so systematically explored: the relationship of researchers to their research participants. In this article, we focus on this second dimension, using emblematic texts in political science, especially in comparative politics, to develop a fourfold typology of political ethnographies that takes into account the emotional dynamics between researchers and participants. We use this typology to analyze various gradations through which these emotional dynamics develop in fieldwork. Focusing on the navigation between distance and proximity that these dynamics entail, we propose the concept of “emotional proximity” to capture relations between the researcher and the participant. We investigate the validity of this novel typology by applying it to ethnographic studies of far-right actors. The political distance separating researchers and participants in these studies allows us to investigate the methodologies of disconnecting political from emotional dynamics across this fourfold schema of ethnographic varieties. We argue that the “infidelity” of emotional distance (instead of proximity) is not an objectivist epistemological necessity but a methodological tool that is indispensable to the practice of participant observation.
We establish higher-order trace formulas for pairs of contractions along a multiplicative path generated by a self-adjoint operator in a Schatten-von Neumann ideal, removing earlier stringent restrictions on the kernel and defect operator of the contractions and significantly enlarging the set of admissible functions. We also derive higher-order trace formulas for maximal dissipative operators under relaxed assumptions and new simplified trace formulas for unitary and resolvent comparable self-adjoint operators. The respective spectral shift measures are absolutely continuous and, in the case of contractions, the set of admissible functions for the nth-order trace formula on the unit circle includes the Besov class $B^n_{\infty , 1}(\mathbb {T})$. Both aforementioned properties are new in the mentioned generality.
In natural speech, phonetic cues that distinguish lexical items can be hyperarticulated when there is a minimal pair competitor, a process known as contrastive hyperarticulation. Building upon prior work, this article examines the cue-specific nature of contrastive hyperarticulation in Japanese, focussing on stop voice onset time (VOT) using a speech corpus. We confirmed that the existence of a voicing minimal pair competitor in the lexicon triggers hyperarticulation of VOT duration on the target segment (shorter for voiced stops and longer for voiceless stops), while other contrasts (singleton vs. geminate) did not. The results also suggest that contrastive hyperarticulation (a) is more compatible with casual speech than slow/clear speech, (b) is sensitive to position in a word (greater in word-initial position than in non-initial position) and (c) applies to a greater degree in Japanese than in English due to properties of stops. This provides further evidence that the phonetic specificity of contrastive hyperarticulation is cross-linguistically relevant.
In this paper, we generalise to the family of Fermat quartics $X^4 + Y^4 = 2^m, m \in \mathbb {Z}$, a result of Aigner [‘Über die Möglichkeit von $x^4 + y^4 = z^4$ in quadratischen Körpern’, Jahresber. Deutsch. Math.-Ver.43 (1934), 226–228], which proves that there is only one quadratic field, namely $\mathbb {Q}(\sqrt {-7})$, that contains solutions to the Fermat quartic $X^4 + Y^4 = 1$. The $m \equiv 0 \pmod 4$ case is due to Aigner. The $m \equiv 2 \pmod 4$ case follows from a result of Emory [‘The Diophantine equation $X^4 + Y^4 = D^2Z^4$ in quadratic fields’, Integers12 (2012), Article no. A65, 8 pages]. This paper focuses on the two cases $m \equiv 1, 3 \pmod 4$, classifying for $m \equiv 1 \pmod 4$ the infinitely many quadratic number fields that contain solutions, and proving for $m \equiv 3 \pmod 4$ that $\mathbb {Q}(\sqrt {2})$ and $\mathbb {Q}(\sqrt {-2})$ are the only quadratic number fields that contain solutions.
Meaning-making in psychotic experiences may affect mental health recovery by influencing the degree to which a person experiences Meaning in Life (MIL). However, how meaning made in such experiences impacts MIL is poorly understood. We aimed to explore how service users engage in meaning-making in their experience of a first-episode psychosis (FEP) (as well as subsequent and current psychotic experiences), and to identify if and how this meaning has influenced their current perspective on MIL.
Methods:
The study aim was addressed using Interpretative Phenomenological Analysis (IPA). We used purposive maximum variation sampling and conducted semi-structured interviews with 16 members of an epidemiologically complete FEP incidence cohort in the Republic of Ireland. Data analysis was guided by IPA procedures.
Results:
We found psychotic experiences both contributed to and eroded MIL but also created memory blanks, blocking the process of meaning-making. Meaning-making in psychotic experiences involved: Living with the impact of psychosis on the self and identity (Survival); Reconnecting with time to move forward in time (Restoring temporality); Navigating agency and powerlessness in chaos (Reclaiming control); Generating Meaning in Life in a vacuum (Presence in absence); and Trying to find a home for psychosis or not needing to (Narrative re-storying).
Conclusions:
Findings challenge current meaning-making theory; suggesting that it may not be fully applicable to the lives of people experiencing psychosis. Our data also have implications for the implementation of trauma informed care, the recovery approach in mental health, clinical practice, and research.
In recent years, integrating physical constraints within deep neural networks has emerged as an effective approach for expediting direct numerical simulations in two-phase flow. This paper introduces physics-informed neural networks (PINNs) that utilise the phase-field method to model three-dimensional two-phase flows. We present a fully connected neural network architecture with residual blocks and spatial parallel training using the overlapping domain decomposition method across multiple graphics processing units to enhance the accuracy and computational efficiency of PINNs for the phase-field method (PF-PINNs). The proposed PINNs framework is applied to a bubble rising scenario in a three-dimensional infinite water tank to quantitatively assess the performance of PF-PINNs. Furthermore, the computational cost and parallel efficiency of the proposed method was evaluated, demonstrating its potential for widespread application in complex training environments.
This article examines the reception of Sappho in Julius Pollux’s Onomasticon. The article shows that Pollux primarily quotes Sappho as an authoritative source on clothing and textiles. This presentation of Sappho is unusual, given that other ancient sources largely locate her poetry within an erotic, and sometimes sympotic, framework; and it is particularly notable for the way in which it emphasizes Sappho’s status as a specifically female poet with special insight into, and expertise in, the feminine domestic world. The article argues that this domestication of Sappho’s verses is not (primarily) an act of sexist belittlement, but rather demonstrates how Pollux reimagines Sappho in his own image. In the material world of the Onomasticon, Sappho becomes in turn an emblem of (feminine) materiality, whose apparent preoccupation with the fabric of everyday life productively mirrors the encyclopaedia’s own. As a whole, the article argues that Pollux’s creative engagement with Sappho’s poetry is both an important constituent part of, and a foil to, her wider reception in both antiquity and modernity.
Numerical studies on the statistical properties of irregular waves in finite depth have to date been based on models founded on weak nonlinearity; as a consequence, only lower-order (usually third-order) nonlinear interactions have thus far been investigated. The present study performs numerical simulations with a fully nonlinear, spectrally accurate model to investigate the statistics of irregular, unidirectional wave fields in finite water depth initially given by a Texel, Marsen and Arsloe spectrum. A series of random unidirectional wave fields are considered, covering a wide range of water depth. The wave spectrum and statistical properties, including the probability density function of the surface elevation, exceedance probability of wave crests and occurrence probability of extreme (rogue) waves, are investigated. The importance of full nonlinearity in comparison with third-order results is likewise evaluated. The results show that full nonlinearity increases kurtosis and enhances the occurrence probability of large wave crests and rogue waves substantially, in both deep water and finite water depth. Therefore, we propose that full nonlinearity may contribute significantly to the formation of rogue waves. Furthermore, to account for the effects of higher-order nonlinearity on modulational instability, we analyse the relationship between the Benjamin–Feir index (BFI) and maximal excess kurtosis. Our results show a strong linear relationship i.e. $({\mathcal{K}}_{max}-3)\propto {\textrm{BFI}}$, in contrast to $({\mathcal{K}}_{max}-3)\propto {\textrm{BFI}}^2$ based on the assumptions of weak nonlinearity, a narrow-banded spectrum and deep-water conditions. Above, $\mathcal{K}_{max}$ is the maximal kurtosis.
The Avicennan text De congelatione et conglutinatione lapidum had a great influence on the alchemical thought of the thirteenth century. This Latin text disputed both the veracity of alchemy and the possibility of alchemical transmutation by arguing that art is inferior to nature and that the alchemists cannot manipulate a metal because its true characteristics are hidden from our senses; thus an alchemist cannot change something which is unknown to him. Newman’s pioneer studies examined the diffusion and impact of the first Avicennan argument on medieval alchemy and he shed light on the art-versus-nature debate. This paper has a twofold aim: on the one hand it aims to further Newman’s study by focusing on the second Avicennan argument, which is closely related to the problem of substantial form, and on the other hand it aims to show how the aforesaid problem paved the way for the emergence of corpuscularianism, which flourished during the early modern period. In this regard, it will become clear that the historiographical case of alchemy and its problem of substantial form can serve as an exegetical tool for ‘bridging’ the Middle Ages and the early modern period with respect to the relation between Aristotelianism and corpuscularianism.
In the American Southwest and northern Mexico, it has long been argued that ceramic vessels with exterior surfaces that are covered with small nodes are Datura seed pod effigies. Datura is a genus of flowering plants containing psychoactive alkaloids that, when consumed, can induce hallucinations. Scholars have argued that these noded vessels were part of a ritual complex originating in Mexico and spreading throughout the Southwest. In his 2012 article, Lankford hypothesized that this ritual complex made its way into the southeastern United States based on the presence of the ceramic type Fortune Noded in the Mississippi River Valley. In this article, we evaluate three hypotheses suggested by Lankford. Our absorbed residue study did not support his first hypothesis that Fortune Noded vessels were directly related to Datura consumption. However, existing archaeological data do support the idea that a ritual complex including noded vessels moved through the Caddoan region to the Central Mississippi Valley. Those data also confirm Lankford’s final hypothesis that Datura was used in Mississippian period contexts in the Central Mississippi Valley. We conclude that Lankford’s hypothesis has merit and suggest that noded vessels and other ritual equipment be considered inalienable objects that moved through a network of ritual practitioners.
In many developing countries, law students face challenges in accessing authoritative legal resources, including statutes, case law, and journal articles, due to the high costs of subscription-based databases such as LexisNexis, HeinOnline, and Westlaw. In Nigeria, additional subscription online resources are available, including LawPavilion, Legalpedia, and Compulaw. These platforms are all rich in content and currency; however, they are often unaffordable for both law students and law libraries. To overcome these challenges, there are many initiatives and movements administered by government institutions, universities, and non-governmental organizations (NGOs) that provide access to both primary and secondary sources of law. Included in the latter group are the Legal Information Institutes (LIIs), Google Scholar, the Social Science Research Network (SSRN), and Justia. This paper examines the role of free legal databases as an alternative for law students and how these freely accessible platforms can support the access gaps that subscription-based legal research tools have often created. The study is conceptual in nature, with reliance on existing literature and analysis of freely available legal information resources to support legal education.