Longtime Dynamics of a Semilinear Lamé System

This paper is concerned with longtime dynamics of semilinear Lamé systems ∂2 t u − μ u − (λ + μ)∇divu + α∂tu + f (u) = b, defined in bounded domains ofR3 with Dirichlet boundary condition. Firstly,we establish the existence of finite dimensional global attractors subjected to a critical forcing f (u).Writing λ + μ as a positive parameter ε, we discuss some physical aspects of the limit case ε → 0. Then, we show the upper-semicontinuity of attractors with respect to the parameter when ε → 0. To our best knowledge, the analysis of attractors for dynamics of Lamé systems has not been studied before

Uma Leitura Decolonial de Xicoténcatl [1826; 2020]

In this study, we used Comparative Literature as a tool to briefly compare the first Latin American historical novel, Xicoténcatl ([1826] 2020) to the model established by Scott in Waverley ([1814] 1985). The purpose of this action was to visualise the congruences and divergences established between the listed works. As a result, this research suggests that Xicoténcatl presents a clear critical ideological content, through the inclusion of the Latin American context of independence from the Spanish Empire. Such representation brings, as mentioned, clear examples of the decolonial potential, something rarely observed in other Latin American inaugural works hybrid of history and fiction. Regarding the theoretical scope, we make use of the perspective of the decolonial studies, according to Palermo (2010), Walsh (2010), Quijano (2005), Mignolo (2003), Lander (2003), Sommer (1993), and others. Furthermore, we discuss about the decolonial critical alternative instituted in a research practice that seeks the disarray of the coloniality of knowledge (QUIJANO, 2005).Neste estudo, recorremos à literatura comparada como ferramenta para cotejar brevemente o primeiro romance histórico latino-americano Xicoténcatl([1826] 2020), diante do modelo instituído por Scott, em Waverley ([1914] 1985), e o romance de Cooper, Mercedes of Castile ([1840] 1856). O objetivo dessa ação é de visualizar as congruências e divergências entre as obras elencadas. Como resultado, obtemos, em Xicoténcatl, o claro teor ideológico crítico do contexto latino-americano de lutas pela independência do Império espanhol, trazendo mostras explícitas do seu potencial decolonial, difícil de se perfazer em outras obras inaugurais latino-americanas híbridas de história e ficção do século XIX. Recorremos, para a fundamentação teórica, à perspectiva dos estudos decoloniais/descoloniais segundo Palermo (2010), Walsh (2010), Quijano (2005), Mignolo (2003), Lander (2000), Sommer (1993), entre outros. Outrossim, discorremos sobre a opção decolonial como opção crítica instituída na nossa prática de pesquisadores tradutores que desejam auxiliar na desarticulação da colonialidade do saber (QUIJANO, 2005)

CLASSIFICAÇÃO DE PONTOS LIDAR PARA A GERAÇÃO DO MDT

Nos últimos anos tem se observado uma representativa evolução da tecnologia LIDAR (Light Detection and Ranging) na aquisição automática do MDT (Modelo Digital do Terreno) em áreas urbanas e rurais. Os métodos existentes na literatura remetem a regiões para casos específicos no hemisfério norte, onde as condições de vegetação e uso do solo são diferentes das encontradas no Brasil. O presente trabalho tem como objetivo investigar e discutir métodos de classificação de dados LIDAR utilizados para a geração automática do MDT, usando osconceitos de morfologia matemática no processo de filtragem e classificação dos pontos. O processo metodológico compreendeu: definição e caracterização da área de aplicação dos testes de verificação, bem como as condições de aquisição dos dados utilizados; descrição do método denominado Filtro Morfológico; e, por fim, o método para a análise e comportamento da metodologia proposta. A qualidade dosprodutos gerados nos experimentos realizados mostrou-se satisfatória, considerando os aspectos numéricos relacionados com o erro médio e a variância das áreas testadas. Os resultados mostraram que a geração do MDT em áreas urbanas apresentou maior consistência em conseqüência, principalmente, da presença de áreas livres ao nível do terreno, favorecendo a viabilidade do uso do método de classificação

DESENVOLVIMENTO DE MUDAS DE AÇAIZEIRO SOB DIFERENTES FREQUÊNCIAS DE IRRIGAÇÃO

O objetivo deste trabalho foi avaliar os efeitos de diferentes frequências de irrigação no desenvolvimento de mudas de açaizeiro no município de Capitão Poço - PA. O experimento foi conduzido em casa de vegetação na Universidade Federal Rural da Amazônia (UFRA), Campus Capitão Poço – Pará, entre julho a dezembro de 2016, sob delineamento inteiramente casualizado (DIC), com 5 repetições e 6 tratamentos hídricos: F1- frequência de irrigação de 12 horas em 12 horas, F2- frequência de irrigação de 24 em 24 horas, F3- frequência de irrigação de 36 em 36 horas, F4- frequência de irrigação de 48 em 48 horas, F5- frequência de irrigação de 60 em 60 horas e F6- frequência de irrigação de 72 em 72 horas. Cada unidade experimental foi composta por duas plantas, o que totalizou60 plantas. Foram analisadas as variáveis: alturas da planta, diâmetro do coleto e número de folhas, biomassa fresca e seca. Não houve diferença significativa das frequências de irrigação para as variáveis analisadas. Dessa forma, nas condições em que o experimento foi realizado, as frequências de irrigação não influenciaram no desenvolvimento das mudas de açaizeiro da cultivar BRS Pará

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014. This paper describes the second data release from this phase, and the fourteenth from SDSS overall (making this, Data Release Fourteen or DR14). This release makes public data taken by SDSS-IV in its first two years of operation (July 2014-2016). Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey (eBOSS); the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data driven machine learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS website (www.sdss.org) has been updated for this release, and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020, and will be followed by SDSS-V.Comment: SDSS-IV collaboration alphabetical author data release paper. DR14 happened on 31st July 2017. 19 pages, 5 figures. Accepted by ApJS on 28th Nov 2017 (this is the "post-print" and "post-proofs" version; minor corrections only from v1, and most of errors found in proofs corrected

Nirmatrelvir/ritonavir in COVID-19 patients with haematological malignancies: a report from the EPICOVIDEHA registry

Background: Nirmatrelvir/ritonavir treatment decreases the hospitalisation rate in immunocompetent patients with COVID-19, but data on efficacy in patients with haematological malignancy are scarce. Here, we describe the outcome of nirmatrelvir/ritonavir treatment in a large cohort of the latter patients. Methods: This is a retrospective cohort study from the multicentre EPICOVIDEHA registry (NCT04733729) on patients with haematological malignancy, who were diagnosed with COVID-19 between January and September 2022. Patients receiving nirmatrelvir/ritonavir were compared to those who did not. A logistic regression was run to determine factors associated with nirmatrelvir/ritonavir administration in our sample. Mortality between treatment groups was assessed with Kaplan-Meier survival plots after matching all the patients with a propensity score. Additionally, a Cox regression was modelled to detect factors associated with mortality in patients receiving nirmatrelvir/ritonavir. Findings: A total of 1859 patients were analysed, 117 (6%) were treated with nirmatrelvir/ritonavir, 1742 (94%) were treated otherwise. Of 117 patients receiving nirmatrelvir/ritonavir, 80% had received ≥1 anti-SARS-CoV-2 vaccine dose before COVID-19 onset, 13% of which received a 2nd vaccine booster. 5% were admitted to ICU. Nirmatrelvir/ritonavir treatment was associated with the presence of extrapulmonary symptoms at COVID-19 onset, for example anosmia, fever, rhinitis, or sinusitis (aOR 2.509, 95%CI 1.448-4.347) and 2nd vaccine booster (aOR 3.624, 95%CI 1.619-8.109). Chronic pulmonary disease (aOR 0.261, 95%CI 0.093-0.732) and obesity (aOR 0.105, 95%CI 0.014-0.776) were not associated with nirmatrelvir/ritonavir use. After propensity score matching, day-30 mortality rate in patients treated with nirmatrelvir/ritonavir was 2%, significantly lower than in patients with SARS-CoV-2 directed treatment other than nirmatrelvir/ritonavir (11%, p = 0.036). No factor was observed explaining the mortality difference in patients after nirmatrelvir/ritonavir administration. Interpretation: Haematological malignancy patients were more likely to receive nirmatrelvir/ritonavir when reporting extrapulmonary symptoms or 2nd vaccine booster at COVID-19 onset, as opposed to chronic pulmonary disease and obesity. The mortality rate in patients treated with nirmatrelvir/ritonavir was lower than in patients with targeted drugs other than nirmatrelvir/ritonavir. Funding: EPICOVIDEHA has received funds from Optics COMMIT (COVID-19 Unmet Medical Needs and Associated Research Extension) COVID-19 RFP program by GILEAD Science, United States (Project 2020-8223)

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Age, Successive Waves, Immunization, and Mortality in Elderly COVID-19 Haematological Patients: EPICOVIDEHA Findings

Introduction: elderly patients with haematologic malignancies face the highest risk of severe COVID-19 outcomes. The infection impact in different age groups remains unstudied in detail. Methods: We analysed elderly patients (age groups: 65-70, 71-75, 76-80 and >80 years old) with hematologic malignancies included in the EPICOVIDEHA registry between January 2020 and July 2022. Univariable and multivariable Cox regression models were conducted to identify factors influencing death in COVID-19 patients with haematological malignancy. results: the study included data from 3,603 elderly patients (aged 65 or older) with haematological malignancy, with a majority being male (58.1%) and a significant proportion having comorbidities. The patients were divided into four age groups, and the analysis assessed COVID-19 outcomes, vaccination status, and other variables in relation to age and pandemic waves.tThe 90-day survival rate for patients with COVID-19 was 71.2%, with significant differences between groups. The pandemic waves had varying impacts, with the first wave affecting patients over 80 years old, the second being more severe in 65-70, and the third being the least severe in all age groups. factors contributing to 90-day mortality included age, comorbidities, lymphopenia, active malignancy, acute leukaemia, less than three vaccine doses, severe COVID-19, and using only corticosteroids as treatment. Conclusions: These data underscore the heterogeneity of elderly haematological patients, highlight the different impact of COVID waves and the pivotal importance of vaccination, and may help in planning future healthcare efforts