We show that previous results from epistemic network models showing the benefits of decreased connectivity in epistemic networks are not robust across changes in parameter values. Our findings motivate discussion about whether and how such models can inform real-world epistemic communities. As we argue, only robust results from epistemic network models should be used to generate advice for the real-world, and, in particular, decreasing connectivity is a robustly poor recommendation.

In this paper, we examine the relationship between general relativity and the theory of Einstein algebras. We show that according to a formal criterion for theoretical equivalence recently proposed by Halvorson and Weatherall, the two are equivalent theories.

A classic result in the foundations of Yang-Mills theory, due to J. W. Barrett ["Holonomy and Path Structures in General Relativity and Yang-Mills Theory." Int. J. Th. Phys. 30, ], establishes that given a "generalized" holonomy map from the space of piece-wise smooth, closed curves based at some point of a manifold to a Lie group, there exists a principal bundle with that group as structure group and a principal connection on that bundle such that the holonomy map corresponds to (...) the holonomies of that connection. Barrett also provided one sense in which this "recovery theorem" yields a unique bundle, up to isomorphism. Here we show that something stronger is true: with an appropriate definition of isomorphism between generalized holonomy maps, there is an equivalence of categories between the category whose objects are generalized holonomy maps on a smooth, connected manifold and whose arrows are holonomy isomorphisms, and the category whose objects are principal connections on principal bundles over a smooth, connected manifold. This result clarifies, and somewhat improves upon, the sense of "unique recovery" in Barrett's theorems; it also makes precise a sense in which there is no loss of structure involved in moving from a principal bundle formulation of Yang-Mills theory to a holonomy, or "loop", formulation. (shrink)

La pandemia de la COVID-19 evidencia posibilidades, límites y nuevos desafíos para la ciencia abierta. En este artículo se presentan los resultados de una investigación que tuvo como objetivo contribuir a la comprensión del papel de la ciencia ciudadana, una de las vertientes de la ciencia abierta, en el abordaje de los problemas plantados por la pandemia. Para ello, se llevó a cabo una revisión de literatura especializada y se acometió la identificación y la categorización de estas iniciativas ciudadanas en (...) Brasil durante el periodo del brote de COVID-19. Los resultados de esta investigación muestran un aprendizaje mutuo entre los abordajes de la ciencia ciudadana y las acciones participativas para reducir los riesgos de desastres. Este aprendizaje, por un lado, fortalece el papel de la producción ciudadana de datos, información y conocimiento relevante para la prevención, resiliencia y gestión de estos riesgos; y, por otro lado, dilata el alcance de la ciencia ciudadana para afrontar situaciones de emergencia y desastre, al tiempo que refuerza el carácter situado de este enfoque. [pt] A pandemia da COVID-19 evidencia possibilidades, limites e novos desafios à abertura da ciência. Neste artigo, apresentam-se resultados de pesquisa que objetivou contribuir para o entendimento do papel da ciência cidadã, uma das vertentes da ciência aberta, para lidar com as questões postas pela pandemia. Além de revisão da literatura, o estudo envolveu a identificação e a categorização de iniciativas cidadãs dessa natureza, no Brasil, durante o período de eclosão da COVID-19. Observa-se o aprendizado mútuo entre as abordagens da ciência cidadã e as ações participativas para redução de riscos de desastre. De um lado, fortalece o papel da produção cidadã de dados, informações e conhecimentos relevantes à prevenção, resiliência e gestão desses riscos; e, de outro, alarga o escopo da ciência cidadã para o enfrentamento de situações de emergência e desastre, ao mesmo tempo em que reforça o caráter situado dessa abordagem. (shrink)

Reactive oxygen species (ROS) are highly reactive molecules produced in cells. So far, they have mostly been connected to diseases and pathological conditions. More recent results revealed a somewhat unexpected role of ROS in control of developmental processes. In this review, we elaborate on ROS in development, focussing on their connection to epithelial tissue morphogenesis. After briefly summarising unique characteristics of epithelial cells, we present some characteristic features of ROS species, their production and targets, with a focus on proteins important (...) for epithelial development and function. Finally, we provide examples of regulation of epithelial morphogenesis by ROS, and also of developmental genes that regulate the overall redox status. We conclude by discussing future avenues of research that will further elucidate ROS regulation in epithelial development. (shrink)

It can seem incoherent to fully characterize fundamentality in terms of grounding, given that the fundamental is precisely that which cannot be fully characterized independently. I argue that there is no such incoherence.

The enduring appeal of liberalism lies in its commitment to the idea that human beings have a "natural" potential to live as free and equal individuals. The realization of this potential, however, is not a matter of nature, but requires that people be molded by a complex constellation of political and educational institutions. In this eloquent and provocative book, Uday Singh Mehta investigates in the major writings of John Locke the implications of this tension between individuals and the institutions (...) that mold them. The process of molding, he demonstrates, involves an external conformity and an internal self-restraint that severely limit the scope of individuality. Mehta explores the centrality of the human imagination in Locke's thought, focusing on his obsession with the potential dangers of the cognitive realm. Underlying Locke's fears regarding the excesses of the imagination is a political anxiety concerning how to limit their potential effects. In light of Locke's views on education, Mehta concludes that the promise of liberation at the heart of liberalism is vitiated by its constraints on cognitive and political freedom. (shrink)

Hobbes and Rousseau relied heavily upon the time-worn metaphor of the body politic to describe and explain their respective political visions. But while Rousseau’s use of the metaphor is largely ac...

From Kabir to Krishnamurti is a far cry. For, they are separated one from the other by over five centuries. But quantitative measurement of this distance has a qualitative aspect which cannot be measured in any time-scale. Two great seers lived in two completely different worlds-with no comparison between the two. And yet they expressed their thoughts and experience not only in a similar language but almost in identical terms. In these two streams of thought represented by Kabir and Krishnaji, (...) the authors note a fascinating parallelism. These streams run parallel to each other-and yet they meet from time to time-at the intersections between the two approaches to life. J. Krishnamurti and Sant Kabir focuses on these meeting points between the two approaches to life. The book also presents the intersections between the writings and sayings of Kabir and Krishnaji. (shrink)

The principle of homophily says that people associate with other groups of people who are mostly like themselves. Many online communities are structured around groups of socially similar individuals. On Twitter, however, people are exposed to multiple, diverse points of view through the public timeline. The authors captured 30,000 tweets about the shooting of George Tiller, a late-term abortion doctor, and the subsequent conversations among pro-life and pro-choice advocates. They found that replies between like-minded individuals strengthen group identity, whereas replies (...) between different-minded individuals reinforce in-group and out-group affiliation. Their results show that people are exposed to broader viewpoints than they were before but are limited in their ability to engage in meaningful discussion. They conclude with implications for different kinds of social participation on Twitter more generally. (shrink)

To make sense of large data sets, we often look for patterns in how data points are “shaped” in the space of possible measurement outcomes. The emerging field of topological data analysis offers a toolkit for formalizing the process of identifying such shapes. This article aims to discover why and how the resulting analysis should be understood as reflecting significant features of the systems that generated the data. I argue that a particular feature of TDA—its functoriality—is what enables TDA to (...) translate visual intuitions about structure in data into precise, computationally tractable descriptions of real-world systems. (shrink)

Our sense of self includes awareness of our thoughts and movements, and our control over them. This feeling can be altered or lost in neuropsychiatric disorders as well as in phenomena such as “automatic writing” whereby writing is attributed to an external source. Here, we employed suggestion in highly hypnotically suggestible participants to model various experiences of automatic writing during a sentence completion task. Results showed that the induction of hypnosis, without additional suggestion, was associated with a small but significant (...) reduction of control, ownership, and awareness for writing. Targeted suggestions produced a double dissociation between thought and movement components of writing, for both feelings of control and ownership, and additionally, reduced awareness of writing. Overall, suggestion produced selective alterations in the control, ownership, and awareness of thought and motor components of writing, thus enabling key aspects of automatic writing, observed across different clinical and cultural settings, to be modelled. (shrink)

Using results from evolutionary game theory, we analyze the conditions under which guilt can provide individual fitness benefits to actors, and so evolve. In particular, we focus on the individual benefits of guilty apology. We find that guilty apology is more likely to evolve in cases where actors interact repeatedly over long periods of time, where the costs of apology are low or moderate, and where guilt is hard to fake.

Poets are "the institutors of laws, and the founders of civil society, and the inventors of the arts of life, and the teachers who draw into a certain ...

This manuscript is intended as a technical supplement to Rosenstock and O'Connor. Calculations are presented for the expected return for strategic players of an iterated prisoner's dilemma which includes guilt-prone grim trigger players, who apologize when they accidentally defect, as well as fake apologizers who in fact act as defectors. See Rosenstock and O'Connor for a discussion of how the results presented here can be interpreted, using ESS analysis and exploring basins of attraction under the replicator dynamics, to help understand (...) the conditions under which guilt can evolve. I hope for this note to both make it easier for others to understand and build on those results, and to demonstrate how expected returns can be calculated for various strategies in various games. (shrink)

The common law system is a legal system that values precedent, or previous court decisions, in the resolution of current cases. As the availability of legal documents in digital form has increased, it has become more difficult for legal professionals to manually identify relevant past cases due to the vast amount of data. Researchers have developed automated systems for determining the similarity between legal documents to address this issue. Our research explores various representations of a legal document and discusses a (...) novel paragraph filtering process to identify key paragraphs using legal citation information to remove unnecessary text paragraphs without disturbing the concept of the legal document. State-of-the-art techniques like TF-IDF, BERT, Legal Bert, Doc2Vec, and Legal-longformer are used for the performance analysis of the proposed approach with document comparison. It has been shown that a model trained on the proposed filtered paragraphs can achieve better results than a model trained on the complete text and can also shorten the document by over 40%. The proposed filtering strategy could be helpful for models like BERT, where the maximum token length is fixed. (shrink)

Mothers use online resources frequently to obtain information on pregnancy, birth, and parenting. Yet, second-time mothers may have different concerns than first-time mothers given they have a newborn infant and another child at home. The current study conducted an on-line textual analysis of the posts of second-time mothers during pregnancy and the first months postpartum on the BabyCenter LLC website, one of the largest online parenting communities. Latent Dirichlet Allocation analysis on roughly 16,000 posts to BabyCenter birth clubs in 2017 (...) by approximately 4,000 users revealed second-time mothers relied on the online support of the BabyCenter community to share and discuss topics of pregnancy, birth, and child rearing. Second-time mothers also raised questions about preparing their firstborn children for a new baby sibling, how they would care for two children, whether they would love the second one as much as the first, and how the second child would change family dynamics. Future research needs to recognize that second-time mothers may have distinct concerns surrounding the birth of their second baby, and antenatal education and parenting classes may need to be modified to be more inclusive of these women’s needs and perspectives. Online parenting communities offer avenues to support women as they make the transition from one child to two and may provide targeted opportunities to disseminate evidence-based practices that can assist these women and their children. (shrink)

Comparative study on the fundamentals of Advaita Vedanta and Mādhyamika Buddhism.

Epidemiological models directly shape policy responses to public health crises. We argue that they also play a less obvious but important role in solving certain coordination problems and social dilemmas that arise during pandemics. This role is both ethically and epistemically valuable. However, it also gives rise to an underappreciated dilemma, as the features that make models good at solving coordination problems are often at odds with the features that make for a good scientific model. We examine and develop this (...) dilemma in the context of the COVID-19 pandemic, and suggest extensions to other domains. (shrink)

What is the role of cultural archives in creating and sustaining connections between diasporic communities? Through an analysis of an audiovisual archive that has sought to bring together representations of and by African, Caribbean and Asian people, this article discusses the relationship between diasporic film, knowledge production and feminist solidarity. Focusing on a self-curated, UK-based archive, the June Givanni Pan-African Cinema Archive, we explore the potentiality of archives for carving out spaces of diasporic connectivity and resistance. This archive assembles the (...) holdings of pan-African films and film-related materials, built over several decades by June Givanni, a Guyanese-born London-based film curator. Givanni’s archive embodies her long relationship with the intersecting worlds of African and Asian diasporic cinema, which hold deep connections to Black British heritage through global networks spanning across empire. In the making of this cultural analysis, we employ a co-produced, decolonial methodological approach by designing and producing the article in collaboration with Givanni over a two-year period. We aim to foreground the role of feminist labour (academic and practitioner) as agents of change who are reclaiming stories, voices and memory-making. The wider backdrop to this co-produced analysis is the ongoing resilience of a cultural amnesia that has pervaded the Black British experience and the current fragility of Black arts and cultural spaces in the UK. Our question is how might archives help us map the connections between racialised ideas of belonging, memory politics and the reconfiguration of colonial power whilst also operating as a site of feminist connectivity? (shrink)

Small unmanned aerial systems (sUAS) are used more regularly and widely in disaster response. Like other personnel involved in disaster response, the sUAS pilots work for long periods, experience extreme stress and fatigue. They often arrive at the disaster fatigued (due to long drives to get there). However, unlike other personnel in this domain, there is little research on the effects of fatigue on sUAS pilots. Our experiences with a series of three real-world deployments highlight the challenges of conducting human (...) factors research during disaster response and recovery. We specifically present lessons learned from having participant researchers embedded in three disasters with the sUAS pilot teams. These lessons result in a set of feasible and non-interruptive methods and metrics for conducting human factors research during field events. Preliminary results and recommended next steps are presented. (shrink)