Identification of mercury and nanoparticles in roots with different oxidation states of an abandoned coal mine

The morphology and composition of roots with different degrees of oxidation as a function of time were evaluated aiming to identify possible hazardous elements and nanoparticles. The roots were obtained from an abandoned coal mine located in the city of Criciúma, Santa Catarina, Brazil. From the roots, analyses were performed to identify nanoparticles (NPs) and ultrafine particles (UFPs), containing possible hazardous elements (PHEs) that cause potential environmental risks and impacts on human health. The identification of nanoscale materials requires greater robustness, so advanced integrated techniques have been used. The characterization of different types of roots was done by using focused ion beam (FIB), to evaluate nano-compound assemblies with high-resolution transmission electron microscopy/energy dispersive spectroscopy (HR-TEM/EDS). The results showed the presence of NPs containing Hg, Co, Cr, Ni, and V. The presence of these elements has increased consistently with the increase of C concentration in the roots, suggesting that the PHEs were gradually released from organic matter and inorganic minerals of coal. However, even with their decrease in roots, it was found that these elements still remained in the soil in significant quantities, even after 15 years of inactivation of the coal mine

Cartografia em educação medica: desafios de um estudante em um curso em formação

TCC (graduação)- Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Curso de Medicina.É visível a necessidade de reflexão referente a mudanças na educação médica no Brasil. Esta pesquisa tem como finalidade narrar os desafios e incertezas de um estudante de medicina da primeira turma do curso de medicina da Universidade Federal de Santa Catarina (UFSC), campus Araranguá, para refletir e compartilhar acerca da formação médica com a comunidade acadêmica envolvida com a implantação e consolidação deste curso. A metodologia tem como base a pesquisa qualitativa, sendo usado a perspectiva do método cartográfico para descrever e vivenciar o processo. Entre os resultados, cita-se a autorreflexão e auto avaliação referentes às temáticas autonomia, ensino a distância e cartografia. Conclui-se que o é importante o incentivo ao uso da cartografia como produção do conhecimento médico a partir do aprendizado com outras narrativas e a auto reflexão para superar os desafios e incertezas por parte do leitor ou do escritor.The need for reflection regarding changes in medical education is visible. This research aims to narrate the challenges and uncertainties of a medical student of the first class of medicine at the Federal University of Santa Catarina (UFSC), Araranguá campus, to reflect and share about these themes with the academic community involved with the implementation. and consolidation of this course. The methodology is based on qualitative research, using the perspective of the cartographic method to describe and experience the process. Among the results, self-reflection and self-assessment regarding the themes exposed and lived here are mentioned. The final considerations are the incentive to use cartography as a production of medical knowledge from learning with other narratives and self-reflection to overcome challenges and uncertainties on the part of the reader or write

Análise de Correlação do Bitcoin com NASDAQ-100 e Ouro

TCC (graduação) - Universidade Federal de Santa Catarina, Centro Tecnológico, Engenharia Elétrica.Desde que o Bitcoin surgiu, ele tem sido muito utilizado como meio de investimento ou como meio de troca. Alguns dos seus defensores alegam que o ativo é uma reserva de valor, enquanto que os mais céticos o tratam como um ativo meramente especulativo. Para lançar luz ao tema, neste trabalho é feito o estudo da série histórica do Bitcoin e, através de técnicas de diferenciação de séries, é calculada a correlação do ativo com o NASDAQ-100 e com o ouro. Mediante algumas suposições estatísticas, com uma confiança de 95\%, é demonstrado que em todos os três cenários avaliados (série completa do Bitcoin desde seu surgimento, desde 2017 e após o Covid-19) que o Bitcoin se assemelha mais ao NASDAQ-100, tendo uma correlação significativa ou até mesmo alta. Quando comparado ao ouro, o cenário mais provável é a correlação ser insignificativa, apesar de o período a partir de 2017 apresentar uma correlação significativa.Since Bitcoin emerged, it has been widely used as a medium of investment or as a medium of exchange. Some of its defenders claim that the asset is a store of value, while the most skeptical treat it as merely a speculative asset. To shed light on the topic, this work studies the Bitcoin historical series and, through series differentiation techniques, its correlation with NASDAQ-100 and gold. Considering some statistical assumptions, with a confidence of 95\% it is shown that in all three scenarios evaluated (Bitcoin complete series since its emergence, since 2017 and after Covid-19) Bitcoin is more similar to the NASDAQ-100, with a significant or high correlation. When compared to gold, the most likely scenario is that the correlation is negligible, even though the period from 2017 onwards shows a significant correlation

Proposta e avaliação de sistema de comunicação de informação escondida em propagandas sonoras

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2014.Esta dissertação propõe um novo sistema de comunicação informado projetado para incorporar a informação escondida em anúncios de áudio. A informação é modulada e transmitida através de uma marca d'água em áudio digital incorporada ao sinal de áudio hospedeiro. A inserção de marca d'água é projetada para alcançar um impacto perceptual mínimo e alta robustez às distorções do ambiente, a fim de cumprir com a proposta de aplicação em marketing. A energia da incorporação está devidamente dimensionada para atingir a alta transparência. Novas técnicas de sincronização e de equalização adaptativa são investigadas e propostas para extrair as informações de forma confiável após as interferências do canal ambiente. Os resultados experimentais, utilizando canais ambientes simulados e reais, ilustram o desempenho do sistema proposto e os resultados estão em contraste a outras técnicas existentes. O objetivo deste trabalho é expor um sistema de marca d'água digital de áudio que integre em um sistema de comunicação informada escondida em propagandas sonoras, permitindo a utilização deste sistema em aplicações de marketing.This dissertation proposes a new informed communication system designed to embed information hidden into audio advertisements. The information is modulated and transmitted through a audio digital watermark embedded into the audio signal host. The watermark embedding is designed to achieve minimal perceptual impact and high robustness to environment distortions in order to comply with the proposed application in marketing. The embedding energy is properly scaled in order to achieve high transparency. Novel synchronization and adaptive equalization techniques are investigated and proposed to reliably extract the information after the channel interferences. Experimental results using simulated and real environment channels illustrate the performance of the proposed system and results are contrasted to other existing techniques

Opportunistic Occupation of Nests of Microcerotermes spp. Silvestri (Termitidae, Termitinae) by Partamona seridoensis Camargo & Pedro (Apidae, Meliponini) in the Brazilian Tropical Dry Forest

Social bees make use of natural or animal-built structures to protect their colonies from environmental stressors. Here, particularly attractive shelters are active termite nests because they provide a stable climatic environment for inquilines. Several social bee species form obligatory associations with termites, among these the stingless bee Partamona seridoensis (Apidae, Meliponini), whose distribution is limited to the Tropical Dry Forest in the Brazilian Northeast. So far, colonies of this meliponine species have been found mainly in arboreal nests of the termite Constrictotermes cyphergaster, which suggests a tight relationship between these two social insect species. The present study was conducted in an area of the Tropical Dry Forest in the Brazilian State of Rio Grande do Norte, where P. seridoensis naturally occurs albeit the absence of C. cyphergaster. We registered 14 colonies of P. seridoensis, all occupying active arboreal nests of termites of the genus Microcerotermes. The only other termites with arboreal nests present in the study area, Nasutitermes corniger, never housed P. seridoensis. This selective preference of the bees for Microcerotermes nests might be due to differences between termites concerning defense mechanisms or concerning thermal stability within the nests

Urban Waterway Logistics

Although Manaus has a favorable geography for waterway transport and is not fully utilized. The objective of this research is to present a proposal for the implementation of an Urban Waterway Modal on the banks of the Rio Negro that surrounds the city of Manaus, aiming to favor the population that needs transportation to get from one point to another, and thus guarantee the decreased congestion on city streets. This project will focus on field and bibliographic research, the technical and economic feasibility also making a cost survey, and a commuting time survey of public transport users, enabling a new solution to the means of transportation in the city

Classification of R&D infrastructure models in basic business incubators technology in the state of Paraná

Support for the development of new technology-based business is a major challenge in Brazil. One reason is the change of the paradigm of an economy based on supply of commodities to an economy of developing and offering technology. In this environment, business incubators are presented as a key player in this process. However, incubators lack of infrastructure available for the technological development of products, as entrepreneurs begin to demand something beyond basic infrastructure. This article aims to classify research and development infrastructure models, based on the degree of importance earned by entrepreneurs belonging to incubators of technology-based companies in the state of Parana. An extensive literature review identified seven research infrastructure development models and discrete manufacturing products. These models were then classified by their features and practices. Following, a hierarchy was built, using the Analytic Hierarchy Process (AHP). Based on this hierarchy, an electronic questionnaire was designed and it was applied to 115 entrepreneurs belonging to 15 incubators of technology-based company, all located in the state of Parana. The responses were used for the construction of the weights of criteria based on the characteristics and analyzed practices. Finally, seven models were classified according to the AHP, providing incubator managers with the best options of laboratory models, according to the characteristics and needs

A Situação dos Defensores de Direitos Humanos no Brasil: legislação e realidade

III Semana Acadêmica de Relações Internacionais foi realizada de 05 a 09 denovembro de 2017, na Universidade Federal da Integração Latino-Americana (UNILA)A proteção dos direitos humanos é um compromisso do Estado Brasileiro assumido e reafirmado em diversos diplomas nacionais e internacionais, destacada a Constituição Federal de 1988, a atual vigente. Não obstante, não só o Estado atua como defensor dos Direitos Humanos. Em várias situações, são agentes privados, indivíduos e associações, que fazem este trabalho. Estes são os Defensores de Direitos Humanos, que, considerando o trabalho prestado, necessitam de especial atenção por parte do Estado Brasileiro. O presente artigo tem por objetivo resgatar alguns destes compromissos legais e discuti-los à luz da realidade brasileira contemporânea, balizados principalmente por um Relatório sobre a Situação dos Defensores de Direitos Humanos formulado em 2005, por uma Representante Especial do Conselho de Direitos Humanos das Nações Unida