Conteúdos em Áudio: o Uso do Podcast como Recurso Educacional na Disciplina de Histologia

Increased use of online tools and digital media along with the speed in which information becomes available over the last few years, asks for adaptations on the educational environments. Recently, due to restrictions imposed by the Covid-19 pandemic, the world has witnessed profound changes in the educational scenario, with a real disruption in the teaching-learning process, which has forcibly been mediated by digital interfaces. In the present work, an experience will be presented, within the scope of education carried out in other classrooms, and also carried out in a Dentistry course at a Brazilian public university. A podcast, with 20 episodes, was implemented as a complementary educational resource, in the Histology discipline. The podcast was made available on the Spotify platform and associated with an Instagram account for dissemination and placement of materials, such as summaries and photos from the course's slide bank. At the end of the school year, a form had been sent to assess the perception of students that listened to the podcast. The project reached 1,262 people, including 14 foreigners. From 87 participants who answered the form, 89.7% noticed a great improvement in their subject understanding and 96.6% rated the content as excellent. The results bring a successful experience during emergency remote teaching, reinforcing the possibility of adopting new digital technologies, which can privilege distant activities and with the potential to generate greater engagement and autonomy for students.    Keywords: Learning. Technology. Podcast. Histology.O crescente uso de ferramentas online e mídias digitais e a velocidade com a qual as informações tornam-se disponíveis ao longo dos últimos anos, vêm requerendo adaptações dos ambientes educacionais. Recentemente, devido às restrições impostas pela pandemia de Covid-19, o mundo presenciou profundas mudanças no cenário educacional, havendo uma verdadeira disruptura no processo de ensino e aprendizagem, que passou forçosamente a ser mediado pelas interfaces digitais. No presente trabalho será apresentada uma experiência, no âmbito das educações realizadas em outras presencialidades, desenvolvida em um curso de Odontologia de uma universidade pública brasileira, durante o período de pandemia. Um podcast, com 20 episódios, foi implementado como recurso educacional complementar, na disciplina de Histologia. O podcast foi disponibilizado na plataforma Spotify e associado a uma conta no Instagram para divulgação e veiculação de material, como resumos e fotos do banco de lâminas da disciplina. Ao término do ano letivo foi enviado um formulário para avaliar a percepção dos estudantes usuários do podcast. O projeto alcançou 1.262 pessoas, incluindo 14 estrangeiros. Dos 87 participantes que responderam o formulário, 89,7% perceberam grande melhora no entendimento da matéria após ouvir o podcast e 96,6% classificaram o conteúdo como excelente. Os resultados trazem uma experiência exitosa durante o ensino remoto emergencial, reforçando a possibilidade da adoção de novas tecnologias digitais, que possam privilegiar atividades à distância e com potencial de gerar maior engajamento e autonomia dos estudantes.   Palavras-chave: Aprendizagem. Tecnologia. Podcast. Histologia

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

International audienceIntermediate-mass black holes (IMBHs) span the approximate mass range 100−105 M⊙, between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼150 M⊙ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M⊙ and effective aligned spin 0.8 at 0.056 Gpc−3 yr−1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc−3 yr−1.Key words: gravitational waves / stars: black holes / black hole physicsCorresponding author: W. Del Pozzo, e-mail: [email protected]† Deceased, August 2020