30472 research outputs found
Sort by
Las humanidades digitales y los estudios literarios
No full textTranslation of a portion of The Digital Humanities and Literary Studies, translated by Leo Cherri and Julieta Vanney
Digest: Multiple factors influence mountain orchid diversity and distribution
Get PDFHow have orchid species diversified in the campos rupestres, Brazil? Fiorini et al. (2023) use genomic data sets and multidisciplinary approaches, including phylogenetics and population genomics, to investigate the diversity of Bulbophyllum. They demonstrate that geographic isolation alone does not explain diversification patterns in Bulbophyllum species throughout the sky forests. Some taxa show considerable evidence of gene flow, and lineages not previously identified as closely related could present a novel source of their genetic diversity
Down, then up: non-parallel genome size changes and a descending chromosome series in a recent radiation of Australian allotetraploid plant species, Nicotiana section Suaveolentes (Solanaceae)
Get PDFBackground and aims: The extent to which genome size and chromosome numbers evolve in concert is little understood, particularly after polyploidy (whole-genome duplication), when a genome returns to a diploid-like condition (diploidisation). We study this phenomenon in 46 species of allotetraploid Nicotiana section Suaveolentes (Solanaceae), which formed less than six million years ago and radiated in the arid centre of Australia.Methods: We analysed newly assessed genome sizes and chromosome numbers within the context of a restriction site-associated nuclear DNA (RADseq) phylogenetic framework.Key results: RADseq generated a well-supported phylogenetic tree, in which multiple accessions from each species formed unique genetic clusters. Chromosome numbers and genome sizes vary from n = 2x = 15-24 and 2.7-5.8 pg/1 C nucleus, respectively. Decreases in both genome size and chromosome number occur, although neither consistently nor in parallel. Species with the lowest chromosome numbers (n = 15-18) do not possess the smallest genome sizes, and although N. heterantha has retained the ancestral chromosome complement, n = 2x = 24, it nonetheless has the smallest genome size, even smaller than that of the modern representatives of ancestral diploids.Conclusions: The results indicate that decreases in genome size and chromosome number occur in parallel down to a chromosome number threshold, n = 20, below which genome size increases, a phenomenon potentially explained by decreasing rates of recombination over fewer chromosomes. We hypothesize that, more generally in plants, major decreases in genome size post-polyploidization take place while chromosome numbers are still high because in these stages elimination of retrotransposons and other repetitive elements is more efficient. Once such major genome size change has been accomplished, then dysploid chromosome reductions take place to reorganize these smaller genomes, producing species with small genomes and low chromosome numbers such as those observed in many annual angiosperms, including Arabidopsis.
Mark W Chase, Rosabelle Samuel, Andrew R Leitch, Maïté S Guignard, John G Conran, Felipe Nollet, Paul Fletcher, Aljaž Jakob, Luiz A Cauz-Santos, Gabriel Vignolle, Steven Dodsworth, Maarten J M Christenhusz, Maria Teresa Buril, Ovidiu Pau
Japanese documentary filmmaker Haneda Sumiko: authorship, representation and gender discourses
No full textThis chapter examines the work of Haneda Sumiko (1926-) one of the pioneering and most prolific documentary filmmakers in post-war Japan. Haneda´s filmmaking career started in the 1950s when she joined Iwanami Productions to make educational films and PR documentaries. She directed her first film in Iwanami in 1957, went freelance in the 1980s and have been making documentaries until recent years. The chapter explores Haneda´s early career, her authorship as woman filmmaker, and the discourses surrounding the reception of her films in recent years
Hyflex and hybrid teaching and learning in higher education: evolving discussions in the post‑Pandemic era
No full textThis collaborative piece provides our collective thoughts and experiences on teaching related to Hyflex and Hybrid environments within higher education (HE) institutions across countries. The piece is the evolution of discussions which started at the ECPR’s TLP Conference in Bratislava (and online) in June 2022 on this topic of hyflex and hybrid learning, and the changing HE environment we are all seeing and experiencing. We offer our thoughts and experiences, but also ask colleagues within our discipline to consider the questions and implications of many of the choices being made for ourselves as teachers, and for our students in the evolving learning environment in this period coming out of the pandemic
A Bayesian learning model of hedge fund performance
Get PDFWe provide a Bayesian learning model in hedge fund performance. Our modelling provides a novel Bayesian aspirational model for panel data that is stable across different priors as reported from the mapping of the prior to the posterior of the Bayesian baseline model with the adoption of different priors. The parameters of our learning equation are time-varying which, to the best of our knowledge, is only addressed in Hu et al. (2017) who assumed that the parameters have time and individual effects and depend on observed covariates. Our data set comes from the Lipper Trading Advisor Selection System (TASS) database which includes data on performance and types of assets under management. Results reveal that a higher initial share price, management fee, leveraged and redemption notice period had a negative effect on learning. The learning curve has a U-shaped relationship, specifically, learning improves over the first three years, and gradually declines to zero by the eight-year. The second stage of analysis shows that though mean levels of learning do not directly influence performance, a higher standard deviation in learning lowers the decline in performance with higher mean learning. But we report variability in results across various models that we test for robustness
Why Lever Press?
No full textMy next book, tentatively titled Star Trek: Voyager: Critical and Historical Approaches to Ethics, Politics, and the End of the 1990s is now under contract at Lever Press (title definitely needs some work). This, for me, is very exciting. An open-access press with an innovative funding model – so there are no author-facing charges – I am really pleased to be working with Lever
Land of hope and tolerance
No full textA letter to the Editor of the Guardian, who declined to publish it
Two years on: LGBTQ* UK pandemic experiences online survey - Preliminary results of the third survey
Get PDFWe haves summarized the preliminary results of our third LGBTQ* UK COVID-19 Experiences survey. A total of 594 LGBTQ* people who live across the UK helped us by completing this survey – thank you to everyone who helped to publicize it and took a look. Data collection took place between 24th of March and 7th of June 2022, with most of the responses submitted in April and May.
The results show the continuing impact of the pandemic and resulting restrictions on the LGBTQ+ community in the UK. Mental health issues, sleep problems and financial struggles were a large concern for many. However, our findings generally show that fewer LGBTQ+ people were emotionally affected by the pandemic when compared to then findings from our previous pandemic surveys and a return to “normal” for many, with lower levels of health concern related to COVID-19 specifically.
Nevertheless, there seems to be a chasm within the LGBTQ+ community regarding feelings of isolation. For the majority the easing of restrictions has brought more freedom. But others experienced further exclusion and were negatively impacted by the decrease in online services availability brought about by the easing of social restrictions. The number of people who considered themselves disabled has risen in comparison to numbers in our previous surveys, and for a lot of disabled participants navigating the easing of social restrictions has been made even more difficult by feeling as if other members of the community had no regard for their safety and health.
In general, the pandemic seemed to give many people in the LGBTQ+ communities in the UK an opportunity to focus on personal development, their hobbies and interests, and/or spend extra time with partners or family. Various respondents had realizations about their gender identity and/or sexuality during the first lockdown and many subsequently decided to come out. This was often aided by the shift to socializing online, making it easier and safer to communicate and come out to others.
This survey is the third part of a series of interview studies within an overarching international research project on LGBTQ* adults’ experiences of the COVID-19 pandemic.
If you have any questions, would like to know more about the results, or would like to quote any of the material here, please do get in touch with Fiona Tasker ([email protected])
Data sources:
Access Repository Dashboard
Do you manage Birkbeck Institutional Research Online? Access insider analytics, issue reports and manage access to outputs from your repository in the CORE Repository Dashboard!