Being popular makes it easier for dictators to govern. A growing body of scholarship therefore focuses on the factors that influence authoritarian popularity. However, it is possible that the perception of popularity itself affects incumbent approval in autocracies. We use framing experiments embedded in four surveys in Russia to examine this phenomenon. These experiments reveal that manipulating information—and thereby perceptions—about Russian President Vladimir Putin’s popularity can significantly affect respondents’ support for him. Additional analyses, which rely on a novel combination of framing and list experiments, indicate that these changes in support are not due to preference falsification, but are in fact genuine. This study has implications for research on support for authoritarian leaders and defection cascades in nondemocratic regimes.

The educational mission of most western schools today includes the nurturing of children’s sexual upbringing, which many scholars see as a way of controlling their sexuality and forming them into “sexual citizens.” This article examines how official Swedish school guidelines and textbooks have mediated sexuality norms through education on masturbation. The professional discourse on masturbation started to change during the first half of the twentieth century, when masturbation shifted from being perceived as something harmful to something accepted as natural and harmless. This article focuses on a period following that shift in opinion: circa 1945-2000. The analysis shows that boys’ sexuality during this time received more attention than girls’, and a strong new norm about sex contributed to masturbation taking on less importance than heterosexual intercourse within a relationship. This article shows how state-controlled curricula have created norms about gender and sexuality, thus contributing to the development of a sexual citizenship.

Preeclampsia (PE) is a hypertensive disorder of pregnancy. PE patients were reported to have higher serum levels of C-reactive protein (CRP), interleukin-6 (IL-6) and tumor necrosis factor α (TNF-α) than those in healthy controls. However, whether the expressions of these inflammation biomarkers have a causal relationship with PE is unspecified. We applied the Mendelian randomization method to infer the causal relationship between inflammation biomarkers (e.g., CRP, IL-6, interleukin 1 receptor antagonist [IL-1ra] and TNF-α) and PE. Single nucleotide polymorphisms (SNPs) strongly related to inflammation biomarkers were used as instrumental variables. CRP, IL-1ra and IL-6 levels showed no significant effect on PE progression, while the genetic predicted higher level of TNF-α significantly increased the risk of PE (OR per 1-SD increase in TNF-α: 4.33; 95% CI [1.99, 9.39]; p = .00021). The findings suggest that pro-inflammatory activity of TNF-α could be a determinant for PE progression. More antenatal care should be given to those pregnant women with higher level of inflammation biomarkers, especially TNF-α.

Two first-order logic theories are definitionally equivalent if and only if there is a bijection between their model classes that preserves isomorphisms and ultraproducts (Theorem 2). This is a variant of a prior theorem of van Benthem and Pearce. In Example 2, uncountably many pairs of definitionally inequivalent theories are given such that their model categories are concretely isomorphic via bijections that preserve ultraproducts in the model categories up to isomorphism. Based on these results, we settle several conjectures of Barrett, Glymour and Halvorson.

This paper relies on nested postulates of separate, linear and arc-continuity of functions to define analogous properties for sets that are weaker than the requirement that the set be open or closed. This allows three novel characterisations of open or closed sets under convexity or separate convexity postulates: the first pertains to separately convex sets, the second to convex sets and the third to arbitrary subsets of a finite-dimensional Euclidean space. By relying on these constructions, we also obtain new results on the relationship between separate and joint continuity of separately quasiconcave, or separately quasiconvex functions. We present examples to show that the sufficient conditions we offer cannot be dispensed with.

This article offers a critical reading of Nuri Bilge Ceylan’s Ahlat Ağacı (The Wild Pear Tree) through an exploration and critique of the mythmaking and monumentalization surrounding the Gallipoli Battle and the multiple ways in which Ceylan’s film unsettles the foundational myths of the last century in Turkey. Ceylan’s scenes and characters are constructed in such a way that the male characters and particularly Sinan (the main character) refuse to succumb to hegemonic codes of masculinity. Through this cinematic refusal by an anti-hero (Sinan), the film addresses the crisis of hegemonic masculinities in their interconnectedness to militarism, nationalism, capitalism, and heteronormativity. Through Sinan’s quest for self-realization, the film signals not only the impotence and vanity of nationalist masculinities but also the caesuras and instabilities in national myths. As the last film of Nuri Bilge Ceylan’s new Land of Ghosts trilogy, which started with Once Upon a Time in Anatolia and Winter Sleep, Ahlat Ağacı seems to close the cycle with a final scene that bespeaks the possibility of unearthing lost others of national mythmaking, bringing fertility and hope to the lands in which collective amnesia reigns supreme.

Marshall Sahlins claims that individuals with personal power, influence, networks, and control over their followers within the political sphere are actually “big-men” rather than “chiefs.” Big-men derive their authority from personal maneuvering, whereas “chiefs” obtain their authority from semi-hierarchical, formalized, and de-personalized rule. De Bruijne argues that those individuals who are perceived as “big men” in post-war Sierra Leone might be better understood as “chiefs.”

To compute the maximum speed threshold for helicopters, we model the lift produced by the rotor blades. Using this model, we derive limits for each method traditionally used to alleviate dissymmetry of lift. Additionally, we find the minimum rotor angular velocity required to produce a prescribed lift at a given forward velocity. We derive conditions on the coefficient of lift for helicopter airfoils that maintain altitude. Further considerations are also made with regard to the properties of the air and its effect on helicopter dynamics.

During the last glacial period, rapidly changing environments posed substantial challenges to Neanderthal populations in Europe. Southern continental regions, such as Iberia, have been proposed as important climatic “buffer” zones during glacial phases. Contextualising the climatic and ecological conditions Neanderthals faced is relevant to interpreting their resilience. However, records of the environments and ecosystems they exploited across Iberia exhibit temporal and spatial gaps in coverage. Here we provide new evidence for palaeotemperatures, vegetation structure, and prey herbivore ecology during the late Pleistocene (MIS 5–3) in northern Spain, by applying multiple stable isotope tracers (δ18O, δ13C, δ15N, δ34S) to herbivore skeletal remains associated with Neanderthal occupations at Axlor Cave, Bizkaia. The results show little change over time and indicate stable climatic conditions and ecosystems across different occupations. Large within-layer isotopic variability in nitrogen and sulphur suggests the presence of a mosaic environment and a variety of isotopic ecotones that were exploited by Neanderthals and their prey. We implement a combination of carbonate and phosphate δ18O measurements to estimate palaeotemperatures using a cost-effective workflow. We show that the targeted use of phosphate δ18O measurements to anchor summer peak and winter trough areas enables high-precision seasonal palaeoclimatic reconstructions.