In most of the Babcock–Leighton (BL) type solar dynamo models, the toroidal magnetic field is assumed to be generated in the tachocline. However, magnetic activity of fully convective stars and MHD simulations of global stellar convection have recently raised serious doubts about the importance of the tachocline in the generation of the toroidal field. We have developed a BL-type dynamo model operating in the bulk of the convection zone, and are extending this model to solar-type stars. In this study, we aim at exploring how the starspot properties affect the stellar magnetic cycle. Observations show that faster rotating stars tend to have stronger magnetic activity and shorter magnetic cycles. By considering the higher latitudes and larger tilt angles of starspots for faster rotators, our simulations reproduce observations that faster rotating stars have shorter magnetic cycle and stronger activity.

Planetary nebulae (PNe) represent the final link in the chain of the gas and dust enrichment of low- and intermediate-mass stars. We present a comprehensive study of the relevant observational data of 10 PNe of the Large Magellanic Cloud (LMC). Analysing them from the UV to the IR, we characterise the nature of the central star (CS) and the dust contribution. We link these results to the evolutionary history of these sources.

German Schlager's simple and static musical form is considered by many authors as an immutable key factor in the genre's overall success. However, the introduction of break routines and pop drops to the genre seem to refute this point of view. Cultural references and musical clichés are also integral parts of Schlager's staging. This paper presents an integrative content analysis of 548 songs from 2009 to 2019 with the aim of observing trends in musical form and the use of both cultural references and musical clichés in contemporary Schlager. Overall, the corpus shows more variability than expected, featuring a growing number of structural parts. Contrary to strong claims, the genre is undergoing a change in musical structure. However, whether this also applies to the reproduction of certain stereotypes in song lyrics remains to be seen: about a quarter of the songs contain cultural references, outnumbering musical clichés by a factor of three.

To variable degrees, inequality is present in all human societies, but how archaeologists measure inequality varies greatly. In recent research, we used the same unit of analysis, house size, to evaluate residential wealth inequality among the Classic (a.d. 250/300–800) Maya of southern Belize. Using a Gini coefficient, we found that even in this peripheral region, high degrees of inequality were present. However, nuances in inequality metrics vary based on the analytical parameters or units of measurement (area versus volume) and the unit of analysis (individual residential structures, all structures within a household group, or the entire household group, including the built environment). Generally, Gini coefficients calculated from volume are greater than those from area, and the unit of analysis affects the Gini coefficient and, thus, our interpretations of the degree of inequality present. We discuss the impact of the unit of analysis for house sizes, and how it affects our interpretations of residential wealth inequality in the past in conjunction with previous archaeological research. The findings are instrumental for comparative analyses of wealth inequality through the study of house size variation in ancient and modern societies, highlighting the value of clear definitions of the unit of analysis.

This article focuses on how dance companies have restaged three of the original automata characters from the ballet Coppélia (Arthur Saint-Léon, 1870), described as the “Negro,” the “Moor,” and the “Chinaman.” In conversation with scholarship on the racialization of objects and the object-ification of humans, I claim these characters embody and reenact the ontological effects of slavery and colonialism, in which notions of human and object collapse into one another. I further argue that such processes vary among the roles, illuminating ways the white colonialist perspective constructs the imagined Chinese body differently than the Black body through human-object relations. As a contribution to discussions within the ballet world surrounding the use of blackface and yellowface, this article exposes how ballet choreography both participates in and reveals object-centered acts of racism through embodiment practices.

The Lagoa Salgada is located in the Paraíba do Sul river delta plain on the coast of Rio de Janeiro state, Brazil, and is one of the few lagoons in the world that have well-developed recent stromatolites. Lagoa Salgada is a hypersaline lagoon formed in a very complex environmental system subjected to terrestrial and oceanic influences under different sea level regimes and climate variations. In addition, sediment and stromatolites are characterized by unusually positive inorganic δ13C VPDB values. For this reason, it has been the target of several geological and paleoenvironmental studies, which, in their great majority, require a geochronological technique in order to determine the changes in the environment over time. When radiocarbon (14C) dating is used, it is necessary to consider some details as the source of 14C in the environment and perform 14C ages calibration accordingly. In the present paper, a bibliographic survey was carried out in order to review the data treatment and improve the environmental evolution discussion based on accurate calibration. Using the Marine20 curve and an undetermined ΔR, we generated growth and depositional models to establish an overview of the formation of this lagoon.

The way we look at the sky is connected to the cosmological paradigm embraced by the society we live in. On the other hand, several astronomical concepts reinforce the idea of a common humanity. Yet, scientific outreach is frequenty reaching out only to a specific part of the world population, often excluding people living in extreme social vulnerability, victims of violence and prejudice, fighting for their lives and for the right of living according to their traditions. We present two outreach projects, developed in Brazil, funded by the Office of Astronomy for Development (OAD) of the International Astronomical Union (IAU), i.e. “Under Other Skies” & “OruMbya”, which tackle the importance of ethno-astronomy, and the collaboration with leaders and cultural agents of marginalised communities. We also describe an educational project born in the favela of Cantagalo Pavão Pavãozinho (PPG), in Rio de Janeiro, during the COVID19 pandemic, which started a collaboration with local educators and artists to offer classes of astronomy and English language to children in the favela.

This paper concerns the translation and interpretation of a succinct quip of Sextus Clodius, a rhetorician in Antony's entourage, on the subject of Fulvia's swollen cheek. The jest is often interpreted as having suggested that she tempted Clodius’ pen, and various double meanings have been proposed. Contextualization may supply a key. The remark could mean that Fulvia seemed to be testing the point of her stylus, and the dark allusion might then be to reports of the manner in which Fulvia had allegedly mistreated the severed head of Cicero.