Analysis of signal processing techniques for optical 112 Gb/s DP-QPSK receivers with experimental data

This paper evaluates several signal processing techniques for optical dual-polarization quadrature phase-shift keying (DP-QPSK) coherent receivers, using offline post-processing of experimental data. In addition to electronically separating the two polarization multiplexed signals, the investigated signal processing algorithms also compensate for chromatic dispersion (CD) and polarization mode dispersion (PMD). In particular, we investigate two distinct architectures: 1)Constant modulus algorithm (CMA) equalization followed by feedforward phase recovery. 2)Decision-directed least mean square (DD-LMS) equalization combined with decision-directed phase recovery. The interplay of both architectures with bulk dispersion compensators and carrier recovery algorithms is also analyzed

FEIJOADA CULTURAL: PROJETO INTERDISCIPLINAR EM ADMINISTRAÇÃO

Conforme Leite (2012), é possível considerar que no caso da multidisciplinariedade, pressupõe-se a utilização de disciplinas que estejam no mesmo nível hierárquico e que embora possuam entre si fronteiras de conhecimento, se relacionam de forma coesa. Assim, o projeto Feijoada Cultural foi desenvolvido na intenção de trazer, aos discentes do curso de Administração, a possibilidade de participar de ação multidisciplinar, focada em incentivar a utilização de ferramentas de gestão que compunham as disciplinas entregues até aquele momento do curso.Sob tal enfoque, justifica-se este projeto. No sentido de que sua aplicação possibilita ao discente a experiência da tomada de decisão no âmbito administrativo, além de criar situações onde estes, em equipe, vivenciem o desenvolvimento de estratégias, aplicação de ferramentas e conhecimentos totalmente voltados à gestão, aplicando na prática o conteúdo recebido em sala de aula.Assim, objetivou-se desenvolver um evento cultural – Feijoada Cultural – aplicando os conhecimentos do processo administrativo – Planejar, Organizar, Dirigir e Controlar – envolvendo acadêmicos de Administração e docentes das disciplinas: Gestão da Informação, Gestão da Produção e Qualidade, Gestão Mercadológica, Logística, Mediação de Conflitos e Coaching e Responsabilidade Social e Sustentabilidade

Landscape Transformation: Temporal Evolution of the Erosion Process on a Hillside on the Island of Itamaracá / Brazil

Urban planning is important to guarantee the quality of life for society, as it proposes spatial planning and problem solving, especially those related to land use. Thus, it was proposed to perform an evaluation of actions that promote and/or accelerate the erosive processes on a hillside located in island of Itamaracá/BR. The “interaction networks” and “land use maps” techniques were used in combination, which resulted in a more accurate environmental assessment, as well as the use of models for future estimates. The results pointed to mediumrisk for the environmental indicators of “occupation types” and evidence of collapse”, and high risk for“urban density”and“vegetation”indicators. It has also been predicted that over the years, the urban sprawl in the area will continue to grow until it reaches stability due to the total occupation of useful areas as well as that the growth rate for vegetation will be negative. Thus, there is a need to mitigate environmental damage in the short term, in order to avoid the occurrence of accidents in the hillside area

TNF-α mediated upregulation of Na1.7 currents in rat dorsal root ganglion neurons is independent of CRMP2 SUMOylation

Clinical and preclinical studies have shown that patients with Diabetic Neuropathy Pain (DNP) present with increased tumor necrosis factor alpha (TNF-α) serum concentration, whereas studies with diabetic animals have shown that TNF-α induces an increase in NaV1.7 sodium channel expression. This is expected to result in sensitization of nociceptor neuron terminals, and therefore the development of DNP. For further study of this mechanism, dissociated dorsal root ganglion (DRG) neurons were exposed to TNF-α for 6 h, at a concentration equivalent to that measured in STZ-induced diabetic rats that developed hyperalgesia. Tetrodotoxin sensitive (TTXs), resistant (TTXr) and total sodium current was studied in these DRG neurons. Total sodium current was also studied in DRG neurons expressing the collapsin response mediator protein 2 (CRMP2) SUMO-incompetent mutant protein (CRMP2-K374A), which causes a significant reduction in NaV1.7 membrane cell expression levels. Our results show that TNF-α exposure increased the density of the total, TTXs and TTXr sodium current in DRG neurons. Furthermore, TNF-α shifted the steady state activation and inactivation curves of the total and TTXs sodium current. DRG neurons expressing the CRMP2-K374A mutant also exhibited total sodium current increases after exposure to TNF-α, indicating that these effects were independent of SUMOylation of CRMP2. In conclusion, TNF-α sensitizes DRG neurons via augmentation of whole cell sodium current. This may underlie the pronociceptive effects of TNF-α and suggests a molecular mechanism responsible for pain hypersensitivity in diabetic neuropathy patients.Open access journalThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Análise da influência das redes sociais na busca por procedimentos cosméticos entre acadêmicos de medicina

INTRODUÇÃO: O objetivo deste trabalho foi avaliar a influência da mídia no interesse de acadêmicos de medicina por procedimentos estéticos. MÉTODOS: Empregou-se um questionário online a 322 estudantes de medicina da UNINOVAFAPI em 2021. Às variáveis estudadas aplicou-se o teste qui-quadrado, intervalo de confiança de 95%. RESULTADOS: A maioria da amostra (72%) era do sexo feminino, e 79,5% cogitaram submeter-se a procedimentos influenciados por anúncios. Mais mulheres (52%) compararam suas fotos nas redes (p=0,0005) e se sentem desconfortáveis em publicar fotos sem filtros (46%; p=0,0002) em comparação aos homens. CONCLUSÃO: O uso de mídias sociais se associa à maior probabilidade de estudantes de medicina, principalmente mulheres, submeterem-se a procedimentos estéticos, compararem-se com outras pessoas e se sentirem desconfortáveis sem filtro

Temporal response of post-activation performance enhancement induced by a plyometric conditioning activity

IntroductionTo better understand the post-activation performance enhancement (PAPE) effect promoted by a plyometric conditioning activity (CA), the aim of this study was to investigate the temporal response of PAPE after a plyometric CA.MethodsFourteen healthy and active adults visited the laboratory 3 times, with an interval of 7 days between each visit. On the first day they were familiarized with the countermovement jump (CMJ) test and plyometric CA. In the second and third visits, participants performed either plyometric CA or control (remaining seated) in a crossover design. The CMJ test was performed pre and 1-, 3-, 6-, and 9-min post the plyometric CA or control. The comparisons were performed using the repeated measure two-factor ANOVA and Bonferroni adjustment (significance level adopted P ≤ 0.05).ResultsTime (P < 0.01), condition (P < 0.01), and interaction (P < 0.01) effects were reported for CMJ comparisons. For the control condition, CMJ increased at 3 min compared to pre (P = 0.03) and at 3 min compared to 1 min (P = 0.03). For the plyometric CA, CMJ increased at 1- (P < 0.01), 3- (P < 0.01), and 6-min (P = 0.02) compared to pre. For condition comparisons, CMJ was different at 1- (P < 0.01), 3- (P < 0.01), 6- (P < 0.01), and 9-min (P = 0.02). The Effect size of the comparisons of all moments compared to pre was null (d < 0.20) for control and small (d < 0.50) for plyometric CA.DiscussionIt is possible to conclude that the plyometric CA promoted a PAPE effect for up to 9-min. Strength and conditioning coaches and practitioners may consider multiple sets of plyometric CA to produce immediate enhancement of power in the lower limbs

Rarity of monodominance in hyperdiverse Amazonian forests.

Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such "monodominant" forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence of monodominance in a massive, basin-wide database of forest-inventory plots from the Amazon Tree Diversity Network (ATDN). Utilizing a simple defining metric of at least half of the trees ≥ 10 cm diameter belonging to one species, we found only a few occurrences of monodominance in Amazonia, and the phenomenon was not significantly linked to previously hypothesized life history traits such wood density, seed mass, ectomycorrhizal associations, or Rhizobium nodulation. In our analysis, coppicing (the formation of sprouts at the base of the tree or on roots) was the only trait significantly linked to monodominance. While at specific locales coppicing or ectomycorrhizal associations may confer a considerable advantage to a tree species and lead to its monodominance, very few species have these traits. Mining of the ATDN dataset suggests that monodominance is quite rare in Amazonia, and may be linked primarily to edaphic factors

Represas de abastecimento público de Juiz de Fora: mananciais da vida

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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