19341 research outputs found
Sort by
Mecanismo de alocação de recursos para priorização de tecnologias a serem desenvolvidas, no contexto da cooperação universidade-indústria.
No full textPrograma de Pós-Graduação em Engenharia de Produção. Departamento de Engenharia de Produção, Instituto de Ciências Exatas e Aplicadas, Universidade Federal de Ouro Preto.A cooperação universidade-indústria é essencial para o avanço tecnológico, possibilitando a aplicação
prática de pesquisas acadêmicas e impulsionando a inovação em diversos setores econômicos. No
contexto nacional, a indústria de mineração assume uma importância estratégica, sendo um pilar
fundamental para o crescimento econômico, a diversificação industrial e a estabilidade econômica do
país. Além disso, desempenha um papel significativo na balança comercial, na geração de receitas fiscais
e no desenvolvimento regional. O objetivo deste estudo é desenvolver um mecanismo de alocação de
recursos para viabilizar a formação de equipes de pesquisadores e profissionais da indústria em uma
unidade mineradora, por meio do delineamento de arranjos institucionais para a geração de novas
tecnologias. Por meio da abordagem qualitativa foram identificadas oportunidades de cooperação entre
a unidade pesquisada e universidades do entorno, e foi configurado possíveis arranjos de cooperação
considerando as competências de pesquisadores do entorno, e as oportunidades de desenvolvimento
tecnológico. Os resultados contribuíram com a proposta de um mecanismo de alocação de recursos que
pode fortalecer a interação entre universidades e indústrias. Além disso, explorou-se sua aplicação no
contexto da mineração, sugerindo que pode não apenas aprimorar a tecnologia nesse setor, mas também
promover o desenvolvimento regional por meio da inovação tecnológica, enriquecendo a literatura sobre
a interação entre universidade e indústria no Brasil.University-Industry cooperation is essential for technological advancement, enabling the
practical application of academic research and driving innovation in diversified economic
sectors. In the national context, the mining industry assumes strategic importance, being a
fundamental pillar for the country's economic growth, industrial diversification, and economic
stability. Additionally, it achieves a significant role in the trade balance, tax revenue generation,
and regional development. The aim of this study is to formulate a resource allocation
mechanism aimed at facilitating the assembly of interdisciplinary teams comprising researchers
and industry practitioners within a mining unit. Through the qualitative methodology, this study
identified collaborative opportunities between the focal research unit and neighboring
universities. Subsequently, potential cooperative frameworks were devised, taking into
consideration the expertise of local researchers and the prospects for technological
advancement in the surrounding milieu. The findings contributed to the proposal of a resource
allocation mechanism aimed at enhancing the interaction between universities and industry.
Furthermore, its application in the context of mining was explored, suggesting that it cannot
only improve technology in this sector but also promote regional development through
technological innovation, enriching the literature on the interaction between universities and
industry in Brazil
Eco no tempo : a reescrita de Antígona no cinema contemporâneo.
No full textPrograma de Pós-Graduação em Artes Cênicas. Departamento de Artes, Instituto de Filosofia, Arte e Cultura, Universidade Federal de Ouro Preto.O objetivo desta dissertação é analisar a tragédia grega Antígona (441 a.C.), de Sófocles,
e o filme Antígona – a resistência está no sangue (2019), da diretora canadense Sophie
Deraspe, levando em consideração os processos de inter-relação, releitura e representação
no cinema contemporâneo, a fim de compreender, como principal objeto de reflexão, o
processo de reescrita realizada pela cineasta nos dias atuais. O estudo tem abordagem
qualitativa, caracterizando-se como analítico-descritivo. Foram utilizadas análises
bibliográficas e cinematográficas como método de pesquisa. O estudo se valeu da
decomposição e recorte de cenas, diálogos e trechos do filme. As discussões centram-se
na jovem refugiada argelina, Antigone Hipponome, na condição de imigrante em
Montreal, no Canadá, junto com sua família. Os apontamentos permitem aprofundar
questões fundamentais sobre as características interdiscursivas, comparativas,
intermidiáticas e adaptativas entre a tragédia sofocliana e o filme, cujo foco analítico
também chama a atenção para os debates políticos e sociais que permeiam a obra fílmica
no século XXI. Ao visualizar os processos de diálogo cultural e intertextual, foram
compreendidos aqui alguns dos significativos preceitos sobre comparação, adaptação
intercultural e intermidialidade entre a dramaturgia e o cinema. Diante disso, a partir das
discussões empreendidas, foi possível perceber que a obra trágica de Antígona e sua
reescritura cinematográfica, proposta por Sophie Deraspe, implica um dinamismo em que
o mito literário se efetiva nos contextos de apropriação, produção e circulação na
contemporaneidade.This Master Thesis is to analyze the Greek Tragedy of Antigone (441 BC), taking into
account the processes of interrelationship, transposition, and film representation in
contemporary cinema to understand, as the main object of reflection, the process of
rewriting the film Antigone (Sophie Deraspe, 2019), by Canadian filmmaker Sophie
Deraspe. The study has a qualitative approach, characterized as analytical-descriptive.
There were used Bibliographic and film analyses as research methods. The research used
the decomposition and clipping of scenes, dialogues, and excerpts from the film Antigone.
Discussions revolve around young Algerian refugee Antigone Hipponome as an
immigrant in Montreal, Canada, with her family. The notes allow us to deepen
fundamental questions about the interdiscursive, comparative, intermedial, and
transpositive characteristics between Sophoclean tragic narrative and cinema, whose
analytical focus also draws attention to the political and social debates that permeate the
film in the 21st century. By visualizing the processes of cultural and intertextual dialogue,
some of the precepts about comparison, intercultural adaptation, and intermediality
between dramaturgy and cinema were understood. Therefore, from the discussions
undertaken, it was possible to perceive that the tragic work of Antigone and its
cinematographic rewriting, proposed by Sophie Deraspe, imply a dynamism in which the
literary myth takes effect in contexts of appropriation, production, and circulation in
contemporary times
The influence of cartographic representation on landslide susceptibility models : empirical evidence from a Brazilian UNESCO world heritage site.
No full textThe influence of cartographic representation of landslides on susceptibility models is well-known but often neglected by academic studies, which rarely explore its practical implications. This study aims to address this knowledge gap by evaluating the impact of different landslide sampling strategies on statistical models of landslide susceptibility in Ouro Preto, a UNESCO World Heritage Site located in South-eastern Brazil. The study’s main objective was to assess how different landslide sampling strategies affected statistical susceptibility models. It adopted an innovative methodological approach that categorized dependent variables between training and test subgroups, adopting both balanced and unbalanced divisions of dependent variables, and focusing on shallow and deep landslides. In addition, the study introduced a systematic and critical approach to cartographic representation, providing valuable insights for future research and practice on landslide susceptibility mapping. Eighteen models were produced using an inventory with 57 historical landslides mapped with an Unmanned Aerial Vehicle. The area and volume of these landslides were determined. Three divisions of dependent variables were adopted between training and test subgroups: one balanced division, with large and deep landslides in both subgroups, and two unbalanced divisions, with a predominance of large and deep landslides in the training subgroup or test subgroup. The construction of landslide susceptibility models employed the information value method, validated through success and prediction curves. The results show the significant influence of cartographic representation (point or polygon) on the quality of statistical models and the spatial distribution of susceptibility classes. The polygonal cartographic representation and balanced partition of dependent variables produced the best results. However, it is emphasized that this cartographic representation is not universally optimal in other contexts. The worst result was obtained using a point and random cartographic representation. Overall, findings indicate the need for more accurate landslide inventories and databases, possibly through standards and regulations
A habilidade inferencial nas atividades de leitura em livros didáticos do ensino fundamental II.
No full textPrograma de Pós-Graduação em Letras. Departamento de Letras, Instituto de Ciências Humanas e Sociais, Universidade Federal de Ouro Preto.A leitura é um dos processos cognitivos fundamentais para o desenvolvimento do aluno. Para
tanto, várias habilidades são acionadas no momento da leitura, entre estas a habilidade
inferencial como parte essencial e que dá suporte para o estudo de outras áreas do conhecimento.
Sendo assim, a leitura não pode ser entendida somente como decodificação de signos
linguísticos. Partindo desse princípio, este trabalho tem como objetivo realizar uma discussão
sobre a habilidade inferencial da leitura e como esta é trabalhada nas atividades de leituras de
anúncios publicitários nos Livros Didáticos (LD) do Ensino Fundamental. Pretende-se
contribuir com reflexões, à luz do referencial teórico que têm abordado a leitura não apenas
como uma habilidade de decodificação, mas comprometida com a formação de um leitor crítico.
Para isso, considera-se a habilidade inferencial como parte integrante que não deve ser
negligenciada neste processo de formação do leitor. A escolha do objeto de estudo se justifica
por se tratar de uma temática presente no trabalho docente com a leitura, bem como evidenciar
a importância da habilidade inferencial no processo de ensino e aprendizagem da habilidade de
leitura, ao entender que o ensino de leitura para o exercício da cidadania legitima a participação
do indivíduo em seu meio social no qual a habilidade inferencial será necessária para
compreensão de diversos tipos de textos. Nesse sentido, a pesquisa se caracteriza pela análise
de atividades que compõem os livros didáticos do 6o ao 9o ano do Ensino Fundamental, no que
diz respeito ao trabalho da estratégia de leitura: inferência. Os resultados a serem descobertos
poderão contribuir para a prática pedagógica dos professores de Língua Portuguesa
relativamente ao lugar que o ensino da habilidade de leitura deve ocupar no processo
educacional do aluno.Reading is one of the fundamental cognitive processes for student's development. To this end,
various skills are activated when reading, including inferential skills, which are essential and
support the study of other areas of knowledge. Therefore, reading cannot be understood solely
as decoding linguistic signs. Based on this principle, the aim of this paper is to discuss the
inferential skill of reading and how it is dealt with in the reading activities of advertisements in
elementary school textbooks (LD). The aim is to contribute to reflections in the light of the
theoretical framework that has approached reading not just as a decoding skill, but one that is
committed to the formation of a critical reader. To this end, inferential skills are considered to
be an integral part that should not be neglected in this process of reader education. The choice
of the object of study is justified by the fact that it is a theme present in the work of teachers
with reading, as well as highlighting the importance of inferential ability in the process of
teaching and learning reading skills, understanding that teaching reading for the exercise of
citizenship legitimizes the participation of the individual in their social environment in which
inferential ability will be necessary for understanding various types of texts. In this sense, the
research is characterized by the analysis of activities that make up the textbooks of the 6th to
9th grades of elementary school, with regard to the work of the reading strategy: inference. The
results to be discovered could contribute to the pedagogical practice of Portuguese language
teachers in relation to the place that teaching reading skills should occupy in the student's
educational process
Assessing and managing safety risks to downstream communities (in hindsight) : what went wrong in the licensing and impact assessment procedures of Brazil’s deadliest dam breaks?
No full textEnvironmental impact assessment (EIA) is a policy tool used all around the world to predict, mitigate, and manage the impacts and risks of development proposals. This tool, if well implemented and articulated with licensing procedures, can result in improvements of project design and in the prevention and mitigation of environmental and social harms. But sometimes EIA can fail, as illustrated the collapse of the Brazilian tailings dams Fundão and B1, in 2015 and 2019 respectively. Despite having gone through licensing and EIA procedures, the two dams collapsed, killing almost 300 people. This study set out to understand how the vulnerability of downstream communities to dam breaks were predicted and managed in the dams’ EIA processes. This study also tried to understand whether the EIA process of a newly approved tailings dam in Brazil (Maravilhas Dam III) improved the prediction of safety risks to downstream communities. The study was based on literature reviews and a content analysis of eighty-four (84) key documents related to the dams’ licensing and EIA procedures. The study found that the risk-related studies of the dams were based on a variety of methods (e.g., Preliminary Hazard Analysis, Failure Mode and Effects Analysis, Dam Break simulations, Contingency Plans) that were implemented in different phases of the licensing procedures. It was possible to identify several flaws and limitations in these methods, such as vagueness, late implementation, fragmented reviews of interdependent risks, and low influence on decision-making. Both the Fundão and B1 dams were approved despite the lack of in-depth and up-to-date risk assessments. Public consultations were generally weak and plagued by tokenism. Post-approval procedures, while informed by monitoring, audits and inspections that confirmed problems in the dams, were unable to educate developers and State authorities about the likelihood of failures and the safety risks to communities. Overall, the Fundão and B1 cases show the importance of not only predicting but also managing risks in a timely, transparent and articulated manner. The Maravilhas III Dam, compared to Fundão and B1, was found to have sounder evaluations of safety risks and stronger public participation. The regulatory and voluntary frameworks concerning tailings dams have improved in recent years. The projects of Fundão and B1 could not receive an environmental license had they been subject to the current Brazilian legislation, because they proposed a now-banned technology (upstream dams) and had vulnerable communities located in self-rescue zones, which is now legally unacceptable. Despite these regulatory changes, there is still room to improve regulations, guidelines and Terms of References for risk analysis and its articulation with impact assessment and public participation. The article discusses the academic implications of the cases to international audiences and put forward several practical recommendations
Environmental and technical assessment on the application of slate waste in Portland-composite cement CEM II.
No full textLarge volumes of waste are generated from the manufacture of slabs, roofing, and tiles using slate stone. The use of waste in the construction industry is prevalent due to the environmental advantages associated with the implementation of circular economy standards. This paper examines the production of Portland cement CEM II using heat-treated slate waste. The fineness index results were 10.95 % for the 75 μm sieve and 23.53 % for the 45 μm sieve. Assessment of reactivity using mechanical methods showed that mortars produced with 20 % slate waste (SW) achieved a strength of 42.35 MPa and a mechanical index of 84.93 %. Direct measurement (FTIR),
along with chemical methods (Frattini Test and Saturated lime test), confirm the pozzolanic activity of the slate waste. The environmental impact assessment demonstrated a reduction in the carbon dioxide emission rate by 21.49 % (6.54E+02 kgCO 2-eq/t) with the use of Portland cement CEM II/CSW. The valorization of slate waste can contribute to the availability of an alternative source of raw material and the reduction of natural resource consumption. However, further studies on mechanical performance and durability are necessary for this waste to be applied in structural cementitious matrices
Atenção domiciliar na atenção primária à saúde : experiências de Ouro Preto/MG e proposta de matriz de elegibilidade para visita domiciliar.
No full textPrograma de Pós-Graduação em Saúde da Família. Departamento de Medicina de Família, Saúde Mental e Coletiva, Escola de Medicina, Universidade Federal de Ouro Preto.Este Trabalho de Conclusão de Mestrado é fruto do Programa de Pós graduação
strico sensu Mestrado Profissional em Saúde da Família (PROFSAÚDE), inserido na
linha de pesquisa ―Atenção à saúde, acesso e qualidade na atenção básica à
saúde‖, no estudo da Atenção Domiciliar (AD) na Atenção Primária à Saúde (APS).
O estudo se dividiu em dois eixos, descritivo e exploratório. O eixo 1 teve por
objetivo descrever as experiências de médicos das Equipes de Saúde da Família de
Ouro Preto/MG, nos âmbitos das ações desempenhadas e das competências de tais
profissionais; utilizou-se o Currículo Baseado em Competências da Sociedade
Brasileira de Medicina de Família e Comunidade na avaliação de atributos
relacionados à da AD, evidenciado a média de presença de ações, conhecimentos,
habilidades e atitudes de cada grupo de competências apontado por tal currículo. O
resultado mostrou que os médicos praticam e sentem-se competentes nos atributos
de “pré requisito”, “essenciais” e ―desejáveis”, porém tem pouca prática e segurança
nos “avançados”. O eixo 2 realizado com 30 médicos brasileiros, para seleção de
critérios de elegibilidade para AD1, ao final de duas rodadas de questionários por
meio da técnica Delphi modificada, obteve consenso forte (>75%) para: acamado,
dependência em AVDB, cuidados paliativos, alteração de mobilidade, doença de
base avançada, cuidador não capacitado; e consenso fraco (50% a 75%) para: uso
de osteomias/oxigênio, dependência para AVDI, pós internação, deficiência física e
alteração de função cognitiva ou comunicação. Conclusão: as ações e competências
de médicos das eSF de Ouro Preto/MG descrevem que os mesmos desempenham e
sentem-se competentes com os atributos próprios à AD1, mas não para os que são
específicos do âmbito da AD2/AD3, mostrando a importância da articulação da APS
e SAD nas RAS para oferta do cuidado integral no âmbito da AD. O estudo delphi
para critérios de elegibilidade para AD1 mostrou que o olhar direcionado aos
agravos com perda funcional, que impossibilita o deslocamento às unidades de
saúde, assim como a ausência de cuidador capacitado o qual ajudaria suprir a
dificuldade na realização de atividades diárias ou mesmo de locomoção, predizem a
inserção na AD1; esses critérios abrem espaço para pesquisas que venham a
acrescentar evidências aos resultados levantados pelo presente trabalho.This Master's Completion Work is the result of the Postgraduate Program strico
sensu Professional Master's Degree in Family Health (PROFSAÚDE), inserted in the
line of research ―Health care, access and quality in basic health care‖, in the study of
Care Home Care (HC) in Primary Health Care (PHC). The study was divided into two
axes, descriptive and exploratory. Axis 1 aimed to describe the experiences of
doctors from the Family Health Teams of Ouro Preto/MG, in the scope of the actions
performed and the skills of such professionals; the Competency-Based Curriculum of
the Brazilian Society of Family and Community Medicine was used to evaluate
attributes related to AD, highlighting the average presence of actions, knowledge,
skills and attitudes of each group of competences highlighted by such curriculum.
The result showed that doctors practice and feel competent in the ―prerequisite‖,
―essential‖ and ―desirable‖ attributes, but have little practice and confidence in the
―advanced‖ ones. Axis 2 carried out with 30 Brazilian doctors, to select eligibility
criteria for AD1, at the end of two rounds of questionnaires using the modified Delphi
technique, obtained a strong consensus (>75%) for: bedridden, dependence on
AVDB, palliative care , mobility changes, advanced underlying disease, untrained
caregiver; and weak consensus (50% to 75%) for: use of osteomias/oxygen,
dependence for AVDI, post-hospitalization, physical disability and changes in
cognitive function or communication. Conclusion: the actions and competencies of
doctors from the eSF in Ouro Preto/MG describe that they perform and feel
competent with the attributes specific to AD1, but not those that are specific to the
scope of AD2/AD3, showing the importance of articulation of PHC and SAD in the
RAS to offer comprehensive care within the scope of AD. The delphi study for
eligibility criteria for AD1 showed that the focus on diseases with functional loss,
which makes it impossible to travel to health units, as well as the absence of a
trained caregiver who would help overcome the difficulty in carrying out daily
activities or even locomotion, predict insertion in AD1; These criteria open space for
research that will add evidence to the results raised by this work
Thermal insulating coating mortars with mining and steel residues and the proposition of a “thermal insulating admixture”.
No full textThe present work developed a thermal insulating coating/plastering mortar from the complete replacement of the natural aggregate by friable quartzite (QTZ), with the addition of steelmaking slag powder (SSP). Despite having promising characteristics, no studies so far have taken advantage of the thermal insulating properties of the SSP. Initially, the QTZ and PEA were characterized according to physical, chemical, mineralogical, and morphological analyses. The mortars were prepared with Portland cement, hydrated lime, air-entraining admixtures (AEA), fine aggregates, and SSP. Four mixes were produced: (1) reference (REF) (with natural sand); (2) QTZ + AEA (NO SSP); (3) QTZ + AEA + 5%SSP, and (4) QTZ + AEA + 10%SSP. The following tests were carried out: flow, water retention, specific gravity (density), water absorption by immersion and by capillarity, flexural strength, compressive strength, adhesive strength, UPV, morphology, shrinkage, thermal conductivity, specific heat, and potential of environmental contamination. As result, the QTZ presented physical characteristics similar to those of the natural aggregate, except for the high content of powdery material. The mortar with 5% SSP had the lowest thermal conductivity (56% lower than REF) and the highest specific heat (37% higher than REF). The SSP’s mineralogical composition and resulting pore system were the most influential factors for these properties. Therefore, the SSP can be considered a “thermal insulating admixture” and the use of these residues is technically feasible to improve the thermal performance of buildings
Identification, characterization and quantification of xanthones from Fridericia formosa leaves extract with antiviral activity.
No full textFridericia formosa (Bureau) L.G. Lohmann (Bignonaceae) is a neotropical liana species found in the Cerrado biome in Brazil. It has been of great interest to the scientific community due to its potential as a source of new antivirals, including xanthones derived from mangiferin. In this context, the present study aimed to characterize and quantify the xanthones present in the ethanol extract of this species using high performance liquid chromatography. Additionally, the antiviral activity against Chikungunya, Zika, and Mayaro viruses was evaluated. The chromatographic analyses partially identified twenty-six xanthones, among which only fourteen had already been described in the literature. The xanthones mangiferin, 2′-O-trans-caffeoylmangiferin, and 2′-O-transcoumaroylmangiferin, are present in higher quantities in the extract, at concentrations of 9.65%, 10.68%, and 3.41% w/w, respectively. In antiviral assays, the extract inhibited the multiplication cycle only for the Mayaro virus with a CE50 of 36.1 μg/mL. Among the isolated xanthones, 2′-O-transcoumaroylmangiferin and 2′-O-trans-cinnamoylmangiferin inhibited the viral cytopathic effect with CE50
values of 180.6 and 149.4 μg/mL, respectively. Therefore, the extract from F. formosa leaves, which has a high content of xanthones, has antiviral potential and can be a source of new mangiferin derivatives
Bloco de terra comprimida (BTC) fabricado com rejeito de barragem de minério de ferro estabilizado com cimento portland e cinza de eucalipto.
No full textPrograma de Pós-Graduação em Engenharia das Construções. Departamento de Engenharia Civil, Escola de Minas, Universidade Federal de Ouro Preto.O processamento de materiais utilizados na construção civil contribui com as altas
taxas de emissões globais de CO2. Esse setor necessita de adaptações em seus
processos de fabricação de materiais a fim de torná-los mais sustentáveis. O bloco de
terra comprimida (BTC) surge como uma alternativa capaz de substituir o tradicional tijolo
cerâmico, pois gera uma menor emissão de CO2, economia de energia e possibilidade
de incorporar resíduos que poderiam ser descartados no meio ambiente. À vista disso,
este trabalho teve como objetivo avaliar as propriedades mecânicas, a durabilidade e a
mineralogia de BTC produzidos com rejeito de minério de ferro de Gesteira (RMFG),
estabilizado com cimento Portland e cinza de biomassa de eucalipto (CBE). Para isso, os
materiais foram caracterizados quanto as propriedades física, química, mineralógica,
térmica e microestrutural. Posteriormente, foram moldados protótipos de BTC e, após os
tempos de cura de 7 e 28 dias, foram testados para avaliação da qualidade. Os resultados
do teste de resistência à compressão indicaram que a inclusão de cimento Portland nos
teores de 10 - 7,5% nas misturas forneceram resistência superior ao recomendado de
1,7 MPa. Em contrapartida, a inclusão de CBE na mistura reduziu a resistência na medida
em que se elevou o teor de substituição. Todos os protótipos estabilizados mostraram
ser eficientes quanto a absorção de água (<20%). Um teor ideal de 7,5% de cimento
Portland e 2,5% de CBE mostrou-se ser viável para fabricação de BTC, atendendo aos
parâmetros de resistência e durabilidade.The processing of materials used in civil construction contributes to high rates of
global CO2 emissions. This sector needs adaptations in its material manufacturing
processes to make them more sustainable. The compressed earth block (BTC) appears
as an alternative capable of replacing the traditional ceramic brick, as it generates lower
CO2 emissions, energy savings and the possibility of incorporating waste that could be
discarded in the environment. In view of this, this work aims to evaluate the mechanical
properties, durability and mineralogical of BTC produced with iron ore waste from Gesteira
(RMFG) and stabilized with Portland cement and eucalyptus biomass ash (CBE). For this,
the materials were characterized regarding their physical, chemical, mineralogical,
thermal and microstructural properties. Subsequently, BTC prototypes were molded and,
after curing times of 7 and 28 days, they were tested to assess quality. The results of the
compressive strength test indicated that the inclusion of Portland cement at levels of 10 -
7.5% in the mixtures provided resistance greater than the recommended 1.6 MPa. On the
other hand, the inclusion of CBE in the mixture reduced the resistance as the substitution
content increased. The prototypes proved to be efficient in terms of water absorption
(<20%). An ideal content of 7.5% Portland cement and 2.5% CBE proved to be viable for
manufacturing BTC, meeting the resistance and durability parameters