A design and simulation of a Brazilian bid based short-term electricity market

In order to overcome a number of difficulties detected on the Brazilian electricity market this paper proposes and tests a bid based short-term market. To simulate the behavior of the hydros in this new market, it was implemented an Agent-Based Model - ABM using the reinforcement QLearning algorithm, Simulated Annealing, and linear programming. In the simulations we used real data from the Brazilian power system encompassing more than 98% of the total hydro installed capacity and three years of market data. The results indicate that the management of (virtual) reservoirs can be under the responsibility of each hydro, which could save water according to their own risk perception, while it is maintained the current efficiency and security levels. Results also suggest that the final monthly short-term market prices can substantially decrease in comparison with the current prices

A new electricity market design for power systems with large share of hydro: improving flexibility and ensuring efficiency and security in the Brazilian case

This paper discusses some problems related with thecurrent Brazilian electricity market, brings out some dilemmasthat should be examined in order to implement a more marketoriented approach, and proposes a new market design toovercome these issues. The proposed market design is based onthe concept of energy right accounts as virtual reservoirs andaims at enhancing the flexibility to enable market participants tocomply with their contracts, while still ensuring the efficient useof the energy resources and maintaining the current securitysupply level. In addition, in order to simulate the behavior of themarket participants in this new framework, an Agent-BasedModel - ABM where agents use reinforcement Q-Learning isdeveloped for the study case. The results show that this newmarket design is suitable to be applied to hydrothermal systemshaving a large share of hydros

A virtual reservoir electricity market design applied to the Brazilian system using an Agent Based Model

This paper discusses the current Brazilian electricitymarket, brings out some dilemmas that should be examined inorder to implement a more market-oriented approach, anddescribes a new market design to overcome these issues. Theproposed market design is based on virtual reservoirs and aimsat enhancing the flexibility to enable market participants tocomply with their contracts, while still ensuring the efficient useof the water and maintaining the current level of the security ofsupply. In addition, to simulate the behavior of the marketparticipants in this new framework, an Agent-Based Model -ABM where agents use reinforcement Q-Learning - is developedand applied to a case study that includes a centralized dispatchas currently exists in Brazil. The results obtained so far showthat this new design is suitable to allow hydros managing theircommercial contract commitments with extra flexibility

Educação em saúde para adolescentes em tempos de Covid-19: relato de experiência Health education for adolescents in times of Covid-19: experience report

A pandemia exigiu uma readaptação no estilo de vida dos adolescentes, que, em sua maioria, possuem longos períodos de convivência em grupos. O objetivo do trabalho foi relatar a experiência vivenciada por estudantes e profissionais envolvidos em um curso Técnico de Enfermagem sobre práticas educativas para adolescentes durante a pandemia da COVID-19. Tratou-se de um relato de experiência de quatro estudantes, três docentes e um enfermeiro de um Instituto Federal sobre a elaboração de estratégias de educação em saúde para adolescentes em tempos de pandemia da COVID-19, nos meses de março à junho de 2021, usando mídias digitais como material educacional. Observou-se que práticas de educação em saúde realizadas por estudantes de enfermagem estimularam o aprimoramento de seus conhecimentos, aproximando os futuros profissionais de sua realidade de trabalho e ao mesmo tempo contribuíram para a prevenção de agravos à saúde do adolescente. Concluiu-se que o trabalho possibilitou aos estudantes e profissionais envolvidos maior interação, trabalho em equipe, desenvolvimento e aprendizagem de novas ferramentas tecnológicas, trazendo benefícios para a sociedade

Streptococcus pyogenes Causing Skin and Soft Tissue Infections Are Enriched in the Recently Emerged emm89 Clade 3 and Are Not Associated With Abrogation of CovRS

Although skin and soft tissue infections (SSTI) are the most common focal infections associated with invasive disease caused by Streptococcus pyogenes (Lancefield Group A streptococci - GAS), there is scarce information on the characteristics of isolates recovered from SSTI in temperate-climate regions. In this study, 320 GAS isolated from SSTI in Portugal were characterized by multiple typing methods and tested for antimicrobial susceptibility and SpeB activity. The covRS and ropB genes of isolates with no detectable SpeB activity were sequenced. The antimicrobial susceptibility profile was similar to that of previously characterized isolates from invasive infections (iGAS), presenting a decreasing trend in macrolide resistance. However, the clonal composition of SSTI between 2005 and 2009 was significantly different from that of contemporary iGAS. Overall, iGAS were associated with emm1 and emm3, while SSTI were associated with emm89, the dominant emm type among SSTI (19%). Within emm89, SSTI were only significantly associated with isolates lacking the hasABC locus, suggesting that the recently emerged emm89 clade 3 may have an increased potential to cause SSTI. Reflecting these associations between emm type and disease presentation, there were also differences in the distribution of emm clusters, sequence types, and superantigen gene profiles between SSTI and iGAS. According to the predicted ability of each emm cluster to interact with host proteins, iGAS were associated with the ability to bind fibrinogen and albumin, whereas SSTI isolates were associated with the ability to bind C4BP, IgA, and IgG. SpeB activity was absent in 79 isolates (25%), in line with the proportion previously observed among iGAS. Null covS and ropB alleles (predicted to eliminate protein function) were detected in 10 (3%) and 12 (4%) isolates, corresponding to an underrepresentation of mutations impairing CovRS function in SSTI relative to iGAS. Overall, these results indicate that the isolates responsible for SSTI are genetically distinct from those recovered from normally sterile sites, supporting a role for mutations impairing CovRS activity specifically in invasive infection and suggesting that this role relies on a differential regulation of other virulence factors besides SpeB

Streptococcus canis Are a Single Population Infecting Multiple Animal Hosts Despite the Diversity of the Universally Present M-Like Protein SCM

Streptococcus canis is an animal pathogen which occasionally causes infections in humans. The S. canis M-like protein (SCM) encoded by the scm gene, is its best characterized virulence factor but previous studies suggested it could be absent in a substantial fraction of isolates. We studied the distribution and variability of the scm gene in 188 S. canis isolates recovered from companion animals (n = 152), wild animal species (n = 20), and humans (n = 14). Multilocus sequence typing, including the first characterization of wildlife isolates, showed that the same lineages are present in all animal hosts, raising the possibility of extensive circulation between species. Whole-genome analysis revealed that emm-like genes found previously in S. canis correspond to divergent scm genes, indicating that what was previously believed to correspond to two genes is in fact the same scm locus. We designed primers allowing for the first time the successful amplification of the scm gene in all isolates. Analysis of the scm sequences identified 12 distinct types, which could be divided into two clusters: group I (76%, n = 142) and group II (24%, n = 46) sharing little sequence similarity. The predicted group I SCM showed extensive similarity with each other outside of the N-terminal hypervariable region and a conserved IgG binding domain. This domain was absent from group II SCM variants found in isolates previously thought to lack the scm gene, which also showed greater amino acid variability. Further studies are necessary to elucidate the possible host interacting partners of the group II SCM variants and their role in virulence

Genomic history of coastal societies from eastern South America

Sambaqui (shellmound) societies are among the most intriguing archaeological phenomena in pre-colonial South America, extending from approximately 8,000 to 1,000 years before present (yr bp) across 3,000 km on the Atlantic coast. However, little is known about their connection to early Holocene hunter-gatherers, how this may have contributed to different historical pathways and the processes through which late Holocene ceramists came to rule the coast shortly before European contact. To contribute to our understanding of the population history of indigenous societies on the eastern coast of South America, we produced genome-wide data from 34 ancient individuals as early as 10,000 yr bp from four different regions in Brazil. Early Holocene hunter-gatherers were found to lack shared genetic drift among themselves and with later populations from eastern South America, suggesting that they derived from a common radiation and did not contribute substantially to later coastal groups. Our analyses show genetic heterogeneity among contemporaneous Sambaqui groups from the southeastern and southern Brazilian coast, contrary to the similarity expressed in the archaeological record. The complex history of intercultural contact between inland horticulturists and coastal populations becomes genetically evident during the final horizon of Sambaqui societies, from around 2,200 yr bp, corroborating evidence of cultural change

Divulgação científica e o projeto momento ciência

O projeto Momento Ciência tem como propósito tornar o conhecimento cientifico acessível, promovendo a divulgação científica através do contato direto de alunos de ensino médio de escolas públicas do Distrito Federal e alunos recém aprovados, calouros, nos cursos de Ciências Biológicas e de Biotecnologia na Universidade de Brasília (UnB). Esse contato com a comunidade científica ocorre por meio de visitas aos laboratórios acadêmicos do Instituto de Ciências Biológicas (IB) da Universidade de Brasília. O projeto obteve resultados positivos e esperados ao longo da sua execução

Estudos Artísticos

Há um compromisso entre o artista e a sociedade. Não é possível retirar a arte do seu contexto social. Neste projecto, em que se desafiam os criadores a pesquisar a obra de outros criadores, reúnem-se aqueles artigos que melhor demonstram a responsabilidade e a solidariedade entre os criadores e os seus pares sociais. São obras, artistas, projetos, plataformas de intervenção, projetos que enfatizam as relações sociais como suporte. Sob esta temática geral foram reunidos 25 artigos para este número 6 da Revista Croma, em linhas de exploração variadas e mantendo a elevada internacionalização da revista: mais de noventa por cento das publicações são exógenas à Faculdade de Belas-Artes da Universidade de Lisboa ou do CIEBA, a sua unidade de investigação. Este é um indicador procurado e atingido de modo consistente em todos os exemplares publicados até hoje, e que se espera poder afirmar com continuidade. As diferentes perspetivas apresentadas nos variados artigos expõe a obra de autores que exploram dimensões relacionais ou perante as quais o espectador é convocado a deslocar o seu posicionamento, a desassossegar-se. A implicação surge como resultado da articulação expressiva dos recursos mais variados, em constante mistura, exibindo o modo como as dimensões materiais e ideais são fundadoras das diversas propostas. Nesta revista não há indiferença, há diferenças.info:eu-repo/semantics/publishedVersio