Twisting Hopf algebras from cocycle deformations

Let $H$ be a Hopf algebra. Any finite-dimensional lifting of $V\in {}^{H}_{H}\mathcal{YD}$ arising as a cocycle deformation of $A=\mathfrak{B}(V)\#H$ defines a twist in the Hopf algebra $A^*$, via dualization. We follow this recipe to write down explicit examples and show that it extends known techniques for defining twists. We also contribute with a detailed survey about twists in braided categories.Comment: 20 page

Educación Popular e Interculturalidad en Haití

Haiti‟s historical reality put us in a constant philosophical and anthropological debate, about our connections with others and how power relationships are organized, sometimes through a so- called humanitarian assistance, that many times have transformed itself in evidence of the process that‟s left in the fraternal logic of the human being. In Haiti, popular education, that create transforming proposal through a horizontality, it‟s almost mandatory, but especially, provocative. Same thing happens with intercultural relations, because it incites the one that comes from outside to let himself affected, transform his/her life, so this way he can transform a hole continent according the same settings he had thought to change.      La realidad histórica de Haití nos enfrenta constantemente a un debate filosófico y antropológico de nuestro vínculo con los demás y de cómo se organizan las relaciones de poder a través de una supuesta asistencia humanitaria, que muchas veces se ha transformado en evidencia de que la lógica fraterna del ser humano todavía tiene mucho camino que andar. En Haití, la educación popular, que genera propuestas transformadoras desde una horizontalidad, es casi obligatoria, pero sobre todo provocadora. Lo mismo pasa con una necesaria interculturalidad que incita al que viene de fuera a dejarse afectar, transformar su vida y así transformar el continente según los parámetros que una vez pensó que quería o podía cambiar

Salvinialean megaspores in the Late Cretaceous of southern Patagonia, Argentina

We report here two megaspores species related to the aquatic ferns of the Order Salviniales from the Late Cretaceous Mata Amarilla Formation (Austral Basin), southern Santa Cruz Province, Argentina. They were assigned to the species Arcellites disciformis and Balmeisporites cf. B. holodictyus. The presence of A. disciformis, in particular, is significant not only because it represents the first record for the Southern Hemisphere, indicating a bi-hemispheric distribution for the species, but it also increases the diversity of this genus in Patagonia. The new record enlarge the importance of water ferns in the Late Cretaceous landscapes of southern South America by adding the presence of a new species. The common occurrences of Arcellites and Balmeisporites, whether in shallow, fresh or brackish water facies, support a local aquatic paleoenvironment for the Mata Amarilla Formation, as was also suggested by the sedimentological evidence. They also allow referring the lower and middle levels of the Mata Amarilla Formation to the Chronostratigraphic Zone M3 (Albian-Cenomanian) defined for the cretaceous of Patagonia on the bases of its megaspore content.Centro de Investigaciones Geológica

Salvinialean megaspores in the Late Cretaceous of southern Patagonia, Argentina

We report here two megaspores species related to the aquatic ferns of the Order Salviniales from the Late Cretaceous Mata Amarilla Formation (Austral Basin), southern Santa Cruz Province, Argentina. They were assigned to the species Arcellites disciformis and Balmeisporites cf. B. holodictyus. The presence of A. disciformis, in particular, is significant not only because it represents the first record for the Southern Hemisphere, indicating a bi-hemispheric distribution for the species, but it also increases the diversity of this genus in Patagonia. The new record enlarge the importance of water ferns in the Late Cretaceous landscapes of southern South America by adding the presence of a new species. The common occurrences of Arcellites and Balmeisporites, whether in shallow, fresh or brackish water facies, support a local aquatic paleoenvironment for the Mata Amarilla Formation, as was also suggested by the sedimentological evidence. They also allow referring the lower and middle levels of the Mata Amarilla Formation to the Chronostratigraphic Zone M3 (Albian-Cenomanian) defined for the cretaceous of Patagonia on the bases of its megaspore content.Centro de Investigaciones Geológica

Hunter-gatherer foraging networks promote information transmission

Central-place foraging (CPF), where foragers return to a central location (or home), is a key feature of hunter–gatherer social organization. CPF could have significantly changed hunter–gatherers’ spatial use and mobility, altered social networks and increased opportunities for information-exchange. We evaluated whether CPF patterns facilitate information-transmission and considered the potential roles of environmental conditions, mobility strategies and population sizes. We built an agent-based model of CPF where agents moved according to a simple optimal foraging rule, and could encounter other agents as they moved across the environment. They either foraged close to their home within a given radius or moved the location of their home to new areas. We analysed the interaction networks arising under different conditions and found that, at intermediate levels of environmental heterogeneity and mobility, CPF increased global and local network efficiencies as well as the rate of contagion-based information-transmission. We also found that central-place mobility strategies can further improve information transmission in larger populations. Our findings suggest that the combination of foraging and movement strategies, as well as the environmental conditions that characterized early human societies, may have been a crucial precursor in our species’ unique capacity to innovate, accumulate and rely on complex culture

Direitas políticas, atores religiosos e projeto conservador no Uruguai: a agenda anti-gênero no centro

Uruguay, like other countries in the region, experienced a conservative political regression after fifteen years of progressive governments, with a neoliberal government, which has promoted a pro-life strategy, and with an unprecedented presence of personalities linked to the military and religious arena. Anti-feminist movements and policies in Uruguay gained new impetus with the change of government in 2020, managing to promote discursive and legal changes. At the center of the discourse and proposals appears the strengthening of the traditional family, hegemonic masculinity and the limitation of rights related to sexual health. The article examines the implementation of the conservative project in Uruguay at two levels of action: in the promotion of legal regulations with anti-feminist content, and in the legitimization of anti-gender discourses on the one hand. On the other hand, the articulation of social, political and religious actors that occurs around this agenda is studied, at the national level and in its transnational articulation. Both levels of action are articulated in public policies that are promoted by the Executive Branch in key ministries such as public health and social development.Uruguay, al igual que otros países de la región, experimentó una regresión política conservadora luego de quince años de gobiernos progresistas, con un gobierno de corte neoliberal, que ha impulsado una estrategia provida, y con una presencia inédita de personalidades vinculadas a los ámbitos religiosos y militares. Los movimientos y políticas antifeministas en Uruguay cobraron nuevo ímpetu con el cambio de gobierno en 2020, logrando impulsar cambios discursivos y legales.  En el centro del discurso y las propuestas aparece el fortalecimiento de la familia tradicional, la masculinidad hegemónica y la limitación de los derechos referidos a la salud sexual. El artículo examina la implantación del proyecto conservador en Uruguay en dos niveles de acción: en la promoción de normativa legal con contenido antifeminista, y en la legitimación de discursos antigénero por un lado. Por otro, se estudia la articulación de actores sociales, políticos y religiosos que se produce en torno a esta agenda, a nivel nacional y en su articulación transnacional. Ambos niveles de acción se articulan en políticas públicas que se impulsan desde el Poder Ejecutivo en ministerios claves como salud pública y desarrollo social.Uruguai, assim como outros países da região, experimenta uma regressão política conservadora após quinze anos de governos progressistas, com um governo neoliberal, que promoveu uma estratégia pró-vida, e com uma presença sem precedentes de personalidades ligadas aos campos religioso e militar. Os movimentos e políticas antifeministas no Uruguai ganharam impulso com a mudança de governo em 2020, promovendo mudanças discursivas e jurídicas. No centro do discurso e das propostas aparecem o fortalecimento da família tradicional, a masculinidade hegemônica e a limitação de direitos relacionados à saúde sexual. O artigo examina a implementação do projeto conservador no Uruguai em dois níveis de ação: na promoção de regulamentações legais com conteúdo antifeminista, e na legitimação de discursos antigênero, por um lado. Por outro lado, estuda-se a articulação de atores sociais, políticos e religiosos que ocorre em torno desta agenda, a nível nacional e na sua articulação transnacional. Ambos os níveis de atuação estão articulados em políticas públicas promovidas pelo Poder Executivo em ministérios-chave como saúde pública e desenvolvimento social

La obra periodística y literaria de Elvira Lindo como hilo conductor de un curso de español como lengua extranjera

ES: El diseño y la puesta en práctica de este proyecto de investigación-acción, llevado a cabo en la Faculdade de Letras da Universidade do Porto, surgió del interés de dos docentes que comparten una asignatura de español como lengua extranjera (ELE) de nivel B2, por vincular de forma más estrecha y evidente los contenidos culturales, sobre todo literarios, con los contenidos lingüísticos a lo largo de todo el programa del curso. El propósito era ir al encuentro de las necesidades específicas de formación de sus estudiantes en el contexto educativo universitario, dada la directa relación entre el aprendizaje de lenguas extranjeras y los estudios literarios y culturales patente en la estructura curricular de las licenciaturas en las facultades de letras de Portugal. Tomando estas premisas como punto de partida y a partir de la elección como lectura extensiva del ensayo de Elvira Lindo 30 maneras de quitarse el sombrero para la asignatura Espanhol B2.1, se reflexionó sobre el modo de aproximar paulatinamente la figura de esta escritora y su obra a los estudiantes, con los objetivos de contribuir a una comprensión profunda del libro y al disfrute de esta lectura, profundizar en aspectos socioculturales de la España contemporánea y apreciar mejor la literatura actual española gracias a su integración significativa dentro de los contenidos del curso.The design and implementation of this action research project, carried out at Faculty of Arts and Humanities of University of Porto, arose from the interest of two teachers who share a subject of Spanish as a foreign language (ELE according to its acronym in Spanish) at a B2 level, to establish a closer and more evident connection between the cultural contents, particularly literary, and the linguistic contents throughout the course program. The purpose was to meet the specific training needs of its students in the university educational context, due to the direct relationship between foreign languages learning and literary and cultural studies, which is evident in the curricular structure of the bachelor's degrees in the faculties of Humanities of Portugal. Taking these premises as a starting point and based on the choice of Elvira Lindo's essay 30 maneras de quitarse el sombrero as an extensive reading for the Spanish B2.1 subject, we reflect on how to gradually introduce the figure of this writer and her work closer to students, with the objectives of contributing to a deep understanding of the book and the enjoyment of this reading, delving into socio-cultural aspects of contemporary Spain and better appreciating current Spanish literature thanks to its significant integration within the contents of the course