Gender Differences in the Work and Home Spheres for Teachers, and Longitudinal Associations with Depressive Symptoms in a Swedish Cohort

The high level of stress among teachers is a frequently reported problem globally but less is known about how demands and resources among teachers affect depressive symptoms, and to what extent gender differences in these conditions can explain potential differences in depressive symptoms. The present study investigated gender differences in teachers’ self-reported depressive symptoms, and differences in their demands and resources in both work and home spheres. Associations between demands and resources, respectively, and depressive symptoms as well as gender differences in these associations were examined. Results from univariate and parallel growth modelling (N = 1,022), using data from six time points (2008 to 2018), found higher levels of depressive symptoms, higher emotional and quantitative work demands, and more time doing unpaid work among female teachers, whereas male teachers reported more time on leisure activities. Emotional and quantitative work demands were associated with depressive symptoms at baseline, and these associations also developed in parallel over time. Leisure time had a negative association with depressive symptoms at baseline. There were no gender differences in the strength of these associations. Findings suggest that gender differences in teachers’ depressive symptoms could be attributable to women’s greater demands in the work sphere and fewer resources in the home sphere than men as opposed to their being more vulnerable to workplace stressors.

Racial Order, Racialized Responses: Interminority Politics in a Diverse Nation

America's racial sands are quickly shifting, with parallel growth in theories to explain how varied groups respond, politically, to demographic changes. This Element develops a unified framework to predict when, why, and how racial groups react defensively toward others. America's racial groups can be arrayed along two dimensions: how American and how superior are they considered? This Element claims that location along these axes motivates political reactions to outgroups. Using original survey data and experiments, this Element reveals the acute sensitivity that people of color have to their social station and how it animates political responses to racial diversity.

The Zoom Boom: How Video Calling Impacts Attitudes Towards Aesthetic Surgery in the COVID-19 Era

Background The COVID-19 pandemic has led to the widespread adoption of video calling. A parallel growth in aesthetic surgery demand has been documented. Objectives To identify associations between video call engagement and aesthetic surgery attitudes. Methods We distributed a cross-sectional survey via Amazon Mechanical Turk in November 2020. Respondents were asked to report their time spent video calling, video calling applications and features (eg, virtual backgrounds) they used, and aesthetic surgery attitudes using the 15-item Acceptance of Cosmetic Surgery Scale (ACSS; higher scores indicate greater acceptance). We compared ACSS scores between video call users and non-users using Student’s t-tests. We used Pearson’s correlation coefficient to quantify associations between ACSS scores and time spent on calls and multivariable analysis to estimate associations between video call engagement and ACSS scores. Results A total of 295 respondents (mean age, 37.6; 49.5% female) completed the survey. Across all video call applications surveyed, video call users had higher ACSS scores than non-users. Increased time respondents spent looking at their own face on video call was moderately associated with higher ACSS scores (r=0.48, P<0.01), while time spent looking at another person’s face was not associated with a change in ACSS scores (r=0.09, P=0.11). Increased video call use was associated with higher ACSS scores. Conclusions Increased video calling use is associated with increased acceptance of aesthetic surgery. Although the clinical significance of ACSS scores can be better elucidated, plastic surgeons should consider the effects of video calling on patient motivations for aesthetic surgery in the COVID-19 era.

Regional problems of transport and logistics system development in the Russian Federation

В статье рассматриваются проблемы функционирования транспортно-логистической системы в регионах Российской Федерации. Одной из важнейших задач, стоящих перед федеральными и региональными властями является развитие транспортно-логистической системы регионов. Возникает ряд сложных проблем, таких как: транснационализация товарных рынков из-за углубления кооперации и специализации производства, увеличение количества позиций товарной номенклатуры. Учитывается параллельный рост потребляемой массы продукции, внедрение инновационных технологий в логистические цепочки поставок и другие возникающие изменения. The article deals with the problems of functioning of the transport and logistics system in the regions of the Russian Federation. One of the most important tasks facing the federal and regional authorities is the development of the transport and logistics system of the regions. There are a number of complex problems, such as: the transnationalization of commodity markets due to the deepening of cooperation and specialization of production, an increase in the number of items in the commodity nomenclature. It takes into account the parallel growth of the consumed mass of products, the introduction of innovative technologies in the logistics supply chain and other emerging changes.

Ontogenetic origins of cranial convergence between the extinct marsupial thylacine and placental gray wolf

Phenotypic convergence, describing the independent evolution of similar characteristics, offers unique insights into how natural selection influences developmental and molecular processes to generate shared adaptations. The extinct marsupial thylacine and placental gray wolf represent one of the most extraordinary cases of convergent evolution in mammals, sharing striking cranial similarities despite 160 million years of independent evolution. We digitally reconstructed their cranial ontogeny from birth to adulthood to examine how and when convergence arises through patterns of allometry, mosaicism, modularity, and integration. We find the thylacine and wolf crania develop along nearly parallel growth trajectories, despite lineage-specific constraints and heterochrony in timing of ossification. These constraints were found to enforce distinct cranial modularity and integration patterns during development, which were unable to explain their adult convergence. Instead, we identify a developmental origin for their convergent cranial morphologies through patterns of mosaic evolution, occurring within bone groups sharing conserved embryonic tissue origins. Interestingly, these patterns are accompanied by homoplasy in gene regulatory networks associated with neural crest cells, critical for skull patterning. Together, our findings establish empirical links between adaptive phenotypic and genotypic convergence and provides a digital resource for further investigations into the developmental basis of mammalian evolution.

Virus-host coexistence in phytoplankton through the genomic lens

Virus-microbe interactions in the ocean are commonly described by “boom and bust” dynamics, whereby a numerically dominant microorganism is lysed and replaced by a virus-resistant one. Here, we isolated a microalga strain and its infective dsDNA virus whose dynamics are characterized instead by parallel growth of both the microalga and the virus. Experimental evolution of clonal lines revealed that this viral production originates from the lysis of a minority of virus-susceptible cells, which are regenerated from resistant cells. Whole-genome sequencing demonstrated that this resistant-susceptible switch involved a large deletion on one chromosome. Mathematical modeling explained how the switch maintains stable microalga-virus population dynamics consistent with their observed growth pattern. Comparative genomics confirmed an ancient origin of this “accordion” chromosome despite a lack of sequence conservation. Together, our results show how dynamic genomic rearrangements may account for a previously overlooked coexistence mechanism in microalgae-virus interactions.