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Newborn e raça: fraturas nas visualidades e nas representações
(Universidade Federal de São Carlos, 2022-10-10)
Bonifácio, Solange
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Cruz, Ana Cristina Juvenal da
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https://lattes.cnpq.br/6736396213946663
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https://lattes.cnpq.br/6520433300866884
This research aims to investigate the method of photography applied to newborn babies called newborn. Newborn is a photography modality aimed at babies up to fifteen days old and performed by professional photographers. It is about performing, in a qualitative approach, a cartography of imagery production on babies based on the Brazilian historical context. The methodology is cartographic inspiration research produced through the realization and analysis of a bibliographic survey on photography, babies and childhoods, under racial analysis. The corpus is composed of the website of the Brazilian Association of Newborn Photographers and the Newborn section of the magazine "Fhox". The data indicate that, in the production of the modality, there are certain specific procedures and techniques that organize a network of which produce a given visuality forces to babies. In other words, it constitutes a certain image of a baby and, consequently, of black and non-black childhood through techniques directed at the newborn to constitute a performance whose projection focuses on predefined poses, some try to be “the mirror of the uterus”. Thus, also different from other events, such as baby shower, birth, birthdays in which photography is the , record of the ritual, in the case of newborn photography it is established as its own ritual of visuality that prescribes the social and subjectivity(s) roles of each subject by moving out in spaces such as schools, screens of communication equipment, among others.
Nuances da visão evangélica dos direitos humanos
(Universidade Federal de São Carlos, 2022-10-10)
Oliveira Junior, Humberto Ramos de
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Souza, André Ricardo de
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https://lattes.cnpq.br/7016915324466152
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https://lattes.cnpq.br/1098253324138344
This investigative work focuses on the performance of evangelical parliamentarians active in the National Congress in relation to human rights agendas. This group of evangelicals has acted strongly by vetoing and obstructing bills and public policies aimed at the so-called “political minorities”, becoming an important and controversial subject in the national political scenario. In contrast, the initiatives of other evangelicals working in the defense of human rights, mainly driven by the values of ecumenism, are also analyzed. The thesis addressed different perceptions in the evangelical environment regarding human rights and how they translate into certain relevant actions, seeking evangelical dissonances regarding the theme of human rights. The research was developed by reviewing the available bibliography on the subject, analyzing documents produced by those involved - such as videos, books, websites and interviews - and, finally, systematized an observation of events with political incidence of the group in focus.
Classificação de centros Hamiltonianos polinomiais biquadrados, e isocronicidade trivial versus formas canônicas para aplicações polinomiais no plano de Jacobiano unitário
(Universidade Federal de São Carlos, 2022-10-10)
Appis, Raul Felipe
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Braun, Francisco
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https://lattes.cnpq.br/5890727692959507
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https://lattes.cnpq.br/4225097714759688
This work, we classify a non- degenerate center at the origin of a planar Hamiltonian system associated to a function of the form $H(x,y)=A(x)+B(x)y^2 + C(x)y^4$, where $A$, $B$ and $C$ are polynomials. After seing a relation between trivial isochronous centers and the Jacobian Conjecture on the plane, we study polynomial maps $f: \mathbb{R}^2 \longrightarrow \mathbb{R}^{2}$, with $f(0,0)=(0,0)$ and Jacobian determinant constant and equal to $1$, and we present sufficient conditions to its injectivity. At last, as a consequence of the study, we characterize the trivial isochronous centers of planar polynomial Hamiltonian system associated to polynomial function of degrees $10$, $12$, $14$ and $22$.
O gênero Meteorus (Hymenoptera, Braconidae) na região neotropical: um estudo integrativo
(Universidade Federal de São Carlos, 2022-10-10)
Almeida, Luis Felipe Ventura de
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Dias, Angélica Maria Penteado Martins
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https://lattes.cnpq.br/8637344058859147
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https://lattes.cnpq.br/8653393020960839
Species are one of the fundamental components of biodiversity. Their correct identification is essential for several areas of biological research such as ecological modeling, pest control and the development of conservation strategies. Despite more than two centuries of taxonomic research most species are still unknown to science. This fact is especially evident in certain megadiverse and historically understudied groups, such as parasitoid wasps. These insects can directly affect the populations of their hosts and have great ecological and economic relevance. Meteorus (Hymenoptera, Braconidae) is a cosmopolitan genus, with over 350 known species, and develops as a koinobiont endoparasitoid of Coleoptera and Lepidoptera larvae, including several agricultural pests. However, this group is still poorly studied in the Neotropical region. In this work, 1,366 specimens belonging to the genus Meteorus, collected in Brazil and Costa Rica, were examined. Fifty-five species were identified in the material studied, among which 36 are considered new to science and described. Molecular data from the COI marker and host records for several of the species studied are included. A dichotomous key for the species recorded in Brazil is presented. The phylogenetic analysis performed corroborates previous works in recovering the genus Zele as a derived lineage from Meteorus and its reclassification is suggested. A new clade with neotropical distribution is identified, corresponding to species related to M. papiliovorus, which is defined primarily by the presence of a carina in the ventro-posterior region of the mesopleuron. Host utilization data demonstrated the presence of a high degree of specialization in the genus, which contrasts with previous records, and especially with what has been described for species with economic relevance. Currently available data suggests that the neotropical species regarded as generalists could represent complexes of cryptic species. The combined use of morphological, molecular and ecological data proved to be relevant for the definition of the species studied here and will likely be essential for the resolution of taxonomic questions still present in the genus.
Trabalho acadêmico e saúde de estudantes de pós-graduação diante dos cortes de financiamento à pesquisa
(Universidade Federal de São Carlos, 2022-10-11)
Reis, Ana Carolina
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Silva, Eduardo Pinto e
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https://lattes.cnpq.br/3492708361349827
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https://lattes.cnpq.br/0259494208473164
Considering the gradual reduction in the promotion of Science and Technology (S&T) in recent years, and paying attention to the situations in which postgraduate researchers find themselves, the general objective of the research is to investigate the reverberations of the current Science Financing policies and technology in academic work and in the health of postgraduate research students. For this, the research analyzed science and technology funding policies at the federal level in the last 5 years, evidencing the conception of State in which these policies are modeled; It analyzed the possible influences of funding policies and their demands on the postgraduate organization, mapping possible psychosocial risks and, finally, investigating other possible variables that are subject to relative changes and courts in funding policies and that may exert influences . in mental health, assigning meaning to academic work and ways of organizing graduate work. The study demonstrates its relevance in light of the need for reflective theoretical deepening on the dynamic relationships between the capital crisis, the new forms of socialization and subjectivity present in academic everyday life, as well as the attributions of functions in relation to public universities in this context, in order to teach new regulations. The methodology for obtaining two results was used from the triangulation of document analysis, questionnaires and semi-structured interviews. The collection of two data was carried out at the National Institute for Space Research (INPE), in view of the current situation of the institution. The study sample included students from four graduate programs. In theoretical terms of analysis of two results, an investigation based on the assumptions of Psychodynamics of Work was privileged, in an interdisciplinary perspective with the other Clinics of Work, Sociology of Education and Sociology of Work. The results suggest dissatisfaction with funding policies, given that this item greatly interferes with students' daily work. The results also suggest an increase in demands and overload, showing the intensification and extension of working hours for postgraduates, weakening the university-private life reconciliation, so that work becomes their own activity. This research favors discourses on two impacts of non-daily financial factors on students, exacerbated self-demand and lack of support that emerged from the managerial mentality. We identified that the levels of satisfaction after entering graduate school decreased, which allows us to infer that the relationship between work management and disciplines tends to produce weaknesses in the students' experiences. The confluence of the two interviewees' answers demonstrates, in addition to individualizing perceptions and symptoms, a collective demonstration of pathologizing ways of life that we have in tune with the work carried out.
Funga poroide da guarnição da aeronáutica de Pirassununga (São Paulo, Brasil)
(Universidade Federal de São Carlos, 2022-10-11)
Giovanini, Mario
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Gugliotta, Adriana
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https://lattes.cnpq.br/7524655663585223
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https://orcid.org/0000-0002-0241-7825
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Sebastiani, Renata
Poroid fungi are a group of major ecological importance given their capacity of breaking down wood. Through their activity, they play an important role in nutrient cycling and ecosystem maintenance, especially in forests. In spite of their importance, they, as are fungi in general, are underrepresented in studies, and their diversity and distribution remain fairly unknown. It's Important that further inventory studies on the group are carried out, given their ecological role and the dependency of conservation efforts on diversity studies. This study aimed at surveying poroid fungi diversity in different woodland formations as well as human-occupied areas of PirassunungaAirforce Base, an important area for conservation studies that holds unsurveyed native vegetation fragments. Being the first of its type done in the area, this study produced important data regarding the diversity of poroid fungi in the area, and samples collected are being cataloged and will be deposited in collections. In total, 46 specimens were collected, of which 42 were identified,representing 14 species and 2 morphospecies, representing eight distinct families. An identification key as well as a Field Guide were produced as the results of the project.
As cordas vibrantes: uma sugestão contextualizada no ensino de Matemática e Física
(Universidade Federal de São Carlos, 2022-10-13)
Paulo, Leonardo Martins de
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Venezuela, Antonio Luís
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https://lattes.cnpq.br/8722224671269332
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https://lattes.cnpq.br/9942981602517434
The purpose of this work is to carry out a research of both historical and scientific concepts, related to the waves produced by vibrating strings. During the preparation of the text, a bibliographic and theoretical survey was carried out on the main researchers of the subject, and the motivations for the discoveries in the field of music and science, thus strengthening the debate and deepening of the theme. In the first pages, the observation made by Pythagoras and his school is reported, referring to the stretched string when placed to vibrate, producing sounds in different frequencies. Since then, the participation of mathematics in this movement, or even in the various later times and different chapters of history, involved ideas, thinkers, and theories that developed over the centuries, such as the wave equation. Next, as an emphasis on the evolution of the concepts exposed and argued, a theoretical-practical application will also be made, where the examples presented and discussed through the Fourier equation are directly connected in this scope. We also suggest, in a didactic way, the construction of a lesson plan, composed of questions from recent entrance exams, where the objective is to lead the student to critical thinking, facing the analysis and solving of exercises in diverse and complex contexts, thus strengthening the debate and enrichment of the teaching and learning process.
Métodos de estimação baseados em modelos na presença de dados faltantes
(Universidade Federal de São Carlos, 2022-10-14)
Ribeiro, Taís Roberta
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Zuanetti, Daiane Aparecida
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https://lattes.cnpq.br/8352484284929824
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https://lattes.cnpq.br/8535649395348433
The missing data are observations that should have been made, but were not for some reason, thus reducing the ability to understand the nature of the phenomenon, in addition to making it difficult to extract information from the analyzed data, since the impact on the results of the studies is not always known. As a considerable part of the statistical techniques were developed to analyze complete data, the missing data usually need to be treated in such a way that the resulting dataset can be analyzed by such established methods. The most used methods to deal with missing data are divided, mainly, between methods of data removal and imputation, being both configurations, in most cases, disadvantageous in terms of the analysis of the final result, either by making the results biased or because we have to work with the uncertainty associated with the imputation of unknown values. In this work, then, we propose some model-based methods for solving the problem of missing data for regression analysis, without having to resort to imputation or removal of information. We verified the performance of the proposed methodologies on simulated data under different scenarios and compared it with the performance of other traditional techniques of imputation and data removal.
Otimização da produção de ácido 3-hidroxipropiônico por Escherichia coli via engenharia metabólica e de processos
(Universidade Federal de São Carlos, 2022-10-14)
Batista, Raquel Salgado
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Silva, Adilson José da
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https://lattes.cnpq.br/3447469350644179
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https://lattes.cnpq.br/6792516042003603
The integration of substrates from bioprocesses is of great interest due to the need of destination for them and the possibility of converting them into value-added products. Among these substrates, the hydrolysates from biorefineries and glycerol obtained from the production of biofuels stand out. Listed as an important chemical platform that can be obtained from biomass by the U.S. Department of Energy, 3-hydroxypropionic acid (3-HP) becomes a product option to be obtained from the co-products mentioned above. The production of 3-HP by biological routes presents some advantages over chemical routes and has become increasingly feasible due to the continuous advancement in industrial biotechnology. To make this production feasible, bioprocesses have been developed from recombinant microorganisms. Thus, the application of genetic engineering in the modification of genes related to the metabolic pathway of these microorganisms allows the construction of strains capable of obtaining 3-HP from cheap substrates (e.g., glycerol, glucose, and xylose). A recombinant E. coli strain developed in our research group showed promising results through the β-alanine production route, but the insertion of the 3-HP production pathway in this strain resulted in a deficiency of cofactors, since the last reaction of the pathway is NADPH dependent. Therefore, the regeneration of this cofactor was evaluated by the expression of genes encoding the NADP+ dependent enzyme glyceraldehyde-3-phosphate dehydrogenase, so that the demand for this cofactor by the NADPH dependent pathways could be met. Overexpression of the gapN gene from Streptococcus equi zooepidemicus, which encodes an NADP+ dependent GAPDH, coupled with regulation of endogenous gapA transcription and the use of glycerol as a carbon source, resulted in 147% higher production compared to the control strain. The use of lactose as an induction agent for the lacUV5 promoter was also evaluated in this study and increased the final 3-HP concentration by about 7% compared to the production obtained by the same strain using 1mM IPTG as an induction agent. Furthermore, conditions with O2 restriction in the process showed that, for the pathway studied, 3-HP production is favored under aerobic condition, and oxygen restriction limits production and leads to acetate accumulation by the cell. Taken together, the strategies evaluated led to the second highest production of 3-HP by the β-alanine pathway reported so far in the literature.
Microcontroladores: definição e implementação de controladores estruturalmente flexíveis para sistemas adaptativos
(Universidade Federal de São Carlos, 2022-10-14)
Siqueira, Bento Rafael
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De Lemos, Rogério
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Ferrari, Fabiano Cutigi
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https://lattes.cnpq.br/3154345471250570
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https://lattes.cnpq.br/3238780932820205
Context: This work starts from the hypothesis that controllers for adaptive systems that are partitioned into elements, in this work called microcontrollers, which are dedicated to each service involved in the stages of a control loop have the advantage of structural flexibility without compromising the reconfiguration and performance of the target system. Objective: This work aims to propose and evaluate an approach to develop controllers that are structurally flexible (i.e. based on microcontrollers), investigating advantages of the approach by comparing with different configurations of controllers. Methodology: In order to achieve the objective, the following activities were performed: (1) definition of flexible controllers by promoting them as a set of independent microcontrollers, demonstrating them as microservices implementations of the control loops; (2) conduction of an exploratory study and associated qualitative analysis regarding the reconfigurations of the controller; (3) execution of comparative studies to evaluate the approach that is being proposed against other approaches found in the literature; and (4) specification of an implementation by using the microcontroller-based approach, to demonstrate the flexibility of the approach. Results: the results and contributions are: an approach to define controllers that are structurally flexible; an exploratory study involving a qualitative analyse about reconfiguration in design time and runtime; a set of comparative studies evaluating different approaches from the literature; a proposal involving the evolution of the multi-layered controller to demonstrate the feasibility of the approach of this work. Conclusion: As conclusion, a multi-layered controller design, based on micro-controllers, provides the basis for defining structurally flexible controllers at operational-time, and may promote reuse at development-time. In addition, even demanding more computational resources, the approach does not impact on the performance and on the reconfiguration of the target system.
Dinâmica de expansão peri-urbana e instrumentos de gestão ambiental sobre áreas protegidas de mananciais no Chile, Brasil e Austrália
(Universidade Federal de São Carlos, 2022-10-14)
Candeias, Flaviana Soares
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Dupas, Francisco Antônio
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https://lattes.cnpq.br/5421344818132855
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Moschini, Luiz Eduardo
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https://lattes.cnpq.br/2728357583462262
Considering the relevance of protected áreas (PAs) used as springs for large urban centers and the pressures they have been suffering with the advancement of urban areas, this work analyzes three PAs and their respective environmental management instruments in different countries of the global southern hemisphere in the Chile, Brazil and Australia, with different socio-environmental and economic realities. The objective is to expand knowledge about the relationship between the variables of land use and the environmental management instruments in force in the area. Through multitemporal mapping of land use, between 1985 and 2020, with LandSat images, Maximum Likelihood classification and in a GIS environment, the changes that occurred in the surroundings and within the limits of the PAs were analyzed. The results indicate a growing urban expansion towards the PAs along with other changes in land use, such as the reduction of vegetation, which influence the quality and quantity of water in springs. Regarding the instruments, problems were identified that converge to inadequate management, in different intensities. To contribute to the maintenance of water resources and ecosystem services in PAs, it is essential that there is an economic investment, monitoring and effective management in the expansion and planning of areas of vegetation linked to urban planning.
Criação da vinheta projeto podcast.o
(Universidade Federal de São Carlos, 2022-10-17)
Rocha, Guilherme Ansanelo
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Silva, Carla Regina
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https://lattes.cnpq.br/6417501858864106
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https://lattes.cnpq.br/4525503693355379
This Work of Completion of Undergraduate Course in Occupational Therapy was carried out from the experience in a professional internship in the field of occupational therapy and culture, in which there was the opportunity to carry out the process of creating a vignette for the project “Podcast.o ” linked to the teaching, research, extension and culture group Human Activities and Occupational Therapy, from the Occupational Therapy Department of the Federal University of São Carlos. This work aims to present the experience report of the creation and sound and visual identity of “Podcast.o. For this purpose, the Fl Studio® audio editing and creation program was used, which allowed us to proceed with all the technical part of the project. The vignette served to draw the attention of those who start watching the podcast episode, the timbres used were rigorously chosen according to the musical scale that most corresponded to the climate and ambiance, with a jovial characteristic, the rhythm of the mix between hip hop with beats with reference to trap music, at 155 bpm it took place in a cohesive way. We can emphasize that work contributes to reflections and practices at the interfaces of art, culture, education and occupational therapy. In addition to expanding teaching and learning strategies, based on the concept of inclusion and access to information as the podcast is about, providing listeners with a new way of absorbing content on the field, practices and reflections of occupational therapy and culture explained throughout of the episodes.
Efeitos da energia elétrica em uma aldeia A’uwẽ/Xavante: o caso da aldeia Etenhiritipá
(Universidade Federal de São Carlos, 2022-10-17)
Abreu, Mariana Monteiro de
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Cohn, Clarice
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https://lattes.cnpq.br/1714080901123094
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https://lattes.cnpq.br/9844401310549354
This dissertation focuses on some of the effects of electricity in an A’uwẽ/Xavante Etenhiritipá village after the implementation by the Federal Government of the rural electrification program known as Luz Para Todos, in 2012. Doing fieldwork in the Etenhiritipá village from its foundation to the installation of electrical energy, I seek to understand how A’uwẽ/Xavante way of life, as they understand it, was modified or enhanced with its use, highlighting the various practices in which it is adopted, defining new relationships on diverse ways, and how this community, despite the risks, much of them they recognize themselves, others are learning to deal with strategically uses it in order to promote their permanence as A’uwẽ/Xavante in the world.
Uma proposta de evolução do sistema Simplified Drum-Buffer-Rope para produção e distribuição para disponibilidade
(Universidade Federal de São Carlos, 2022-10-18)
Castro, Robson Flávio
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Tavares Neto, Roberto Fernandes
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https://lattes.cnpq.br/6954662222457389
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https://orcid.org/0000-0002-4659-1745
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https://lattes.cnpq.br/0980302907365440
The Simplified Drum-Buffer-Rope (S-DBR) is a system that encompasses the planning, scheduling, production control, and control inventory replenishment in the supply chain. S-DBR offers distinct approaches for make-to-order and make-to-stock manufacturing environments. For this research, we focus on the method applicable to make-to-stock environments, known as Make-To-Availability (MTA) in S-DBR. MTA commits to ensuring high product availability. To adapt to merchandise distribution environments, the MTA has been expanded by incorporating new rules. While this expansion isn't considered a new method by its original authors, we refer to it as Distribution-To-Availability (DTA) to differentiate it from MTA. Our previous studies on S-DBR revealed operational challenges with both MTA and DTA. Therefore, this research aims to propose enhancements for these two methods, which are supported by four specific objectives. The first objective (i) is to conduct a systematic literature review to identify suggestions and proposed improvements for S-DBR and its predecessor, DBR. The review uncovered that the previously identified problems have yet to be addressed, and studies are scarce on S-DBR compared to DBR. One of the difficulties encountered by MTA is effectively managing manufacturing environments with sequence-dependent setup time. The second (ii) and third (iii) objectives are dedicated to tackling this challenge. Objective (ii) involves identifying dispatch rules suitable for MTA, while objective (iii) focuses on proposing a solution for MTA in sequence-dependent setup time environments. In the case of DTA, the challenge lies in planning the replenishment of stock buffers within the supply chain, particularly in the distribution network. S-DBR emphasizes the need for frequent inventory allocation but does not offer a solution that effectively balances transport costs and inventory maintenance costs. Consequently, the specific objective (iv) aims to propose a solution that enables DTA to address the trade-off between transportation costs and inventory maintenance costs, ensuring both product availability and profitability. The research results demonstrate that utilizing different dispatch rules can enhance the performance of MTA. Furthermore, our proposed solution for sequence-dependent setup time environments has improved the performance of MTA. Regarding DTA, the proposed solutions effectively ensure inventory supply in the distribution network by striking a balance between transport and inventory maintenance costs, thereby maintaining product availability and profitability.
Produtividade e retorno econômico sob doses de nitrogênio em lavouras de milho irrigado e sequeiro, no município de Buri - SP
(Universidade Federal de São Carlos, 2022-10-20)
Oliveira, Gustavo Raphael de
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Afférri, Flávio Sérgio
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https://lattes.cnpq.br/4868650342029685
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https://lattes.cnpq.br/4995640535831099
Nitrogen is essential in corn and the rising prices of this fertilizer become a big problem for producers. Therefore, this research was carried out with the central objective of analyzing the influence of different doses of nitrogen on productivity and economic return in irrigated and rainfed maize under crop conditions, in the municipality of Buri - SP. The treatments in each environment consisted of 4 doses of nitrogen in topdress in the form of urea (40, 80, 120 and 160 kg ha-1) and the experimental design was randomized blocks, with 8 replications. The yield of corn grains in the rainfed and irrigated environments and the economic viability of the nitrogen doses used in the experiments were evaluated. The results showed that there was no significant difference between the averages of nitrogen doses within each environment, however, when analyzing the averages of corn grain yield between the rainfed and irrigated environments, higher productivity was observed in the irrigated environment. Regarding the economic analysis, the highest economic return was verified at the dose of 80 kg ha-1 of N in topdress, being more expressive in the rainfed crop. This research suggests that studies on reducing the dose of N can signal optimization of the use of urea, allowing greater profitability for producers and ensuring a more sustainable agriculture.
Detecção de impressões digitais por meio da luminescência autoativada de nanopartículas de fosfato de cálcio amorfo
(Universidade Federal de São Carlos, 2022-10-20)
Silva, Jussara Soares da
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Silva, Elson Longo da
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https://lattes.cnpq.br/9848311210578810
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https://lattes.cnpq.br/2586454534909121
In this work, stable activator-free photoluminescent nanoparticles based on amorphous calcium phosphate (ACP) were obtained for the first time, and their performance for latent fingerprint imaging was investigated. ACP nanoparticles with irregular rounded shape and diameters in 10–40 nm range were prepared by a rapid and simple chemical precipitation followed by heat treatment at 400 °C for 4 h. Notably, diffuse reflectance spectroscopy, photoluminescence excitation and emission measurements reveal a high density of localized energy states within the wide optical band gap of heat-treated ACP (Eg = 5.25–5.42 eV). This behavior allowed the excitation of ACP in near-ultraviolet region (λexc = 450 nm, 2.75 eV), leading to an intense defect-related broadband (490–890 nm) photoluminescence emission centered at 540 nm (2.30 eV), 50 times more intense than untreated nanoparticles. The effect of lattice shrinkage due to structural water elimination, the presence of ionic vacancies (VCa and VO in PO43-) and carbonate groups (CO32−), on the luminescent properties of ACP were discussed in detail, as well as investigated after aqueous-mediated ACP crystallization into hydroxyapatite (HA). ACP nanoparticles were non-cytotoxic, as determined by MTT assay in Human Dermal Fibroblast neonatal (HDFn) cell line, with cell viabilities superior to 95% in all tested concentrations (20–320 μg/mL), after incubation for 24 and 48 h. Latent fingerprint images were obtained using the ACP nanoparticles under near-ultraviolet irradiation (λexc = 450 nm) in tweezers and LCD smartphone and successfully validated by the Integrated Automated Fingerprint Identification System used by Scientific Police in Spain. The present results evidenced that the new luminescent ACP nanoparticles are safe to be used and agree with the forensic requirements for future legal actions.
Desenvolvimento de procedimentos para a determinação de cobre e zinco em fertilizantes minerais misto por espectrometria de emissão óptica com plasma induzido por micro-ondas (MIP OES)
(Universidade Federal de São Carlos, 2022-10-21)
Fidelis, Suzane Cristina
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Nogueira, Ana Rita de Araújo
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https://lattes.cnpq.br/7034773971317045
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https://lattes.cnpq.br/1343707476494928
DEVELOPMENT OF PROCEDURES FOR COPPER AND ZINC DETERMINATION IN MIXED MINERAL FERTILIZERS BY MICROWAVE-INDUCED PLASMA OPTICAL EMISSION SPECTROMETRY (MIP OES). In the pulp industry, eucalyptus, introduced in Brazil in 1904, is the main raw material, according to the Brazilian Association of Silviculture. For these plants' good development, fertilizers must be used to meet their nutritional needs. In this approach, the determination of nutrients both in plants and in fertilizers is a demand of industrial quality control laboratories. Mixed mineral fertilizers, specifically the micronutrients copper and zinc, were the object of the present study. In partnership with the raw material supplier, aspects related to sampling were evaluated, and compaction during transport was investigated. Next has studied the sample preparation, with digestions involving open vials and assisted by microwave radiation. The determination of the analytes (copper and zinc) was performed by microwave-induced plasma optical emission spectrometry (MIP OES). The equipment and materials necessary for the execution of this project were made available in the laboratories of Bracell, unit in Lençóis Paulista, in the São Paulo State. The raw material responsible for being the source of copper and zinc (10% of each nutrient) was provided by the supplier. Different extractor solutions such as aqua regia, sulfuric acid, and citric acid did not show greater extractions effectiveness than hydrochloric acid, the method recommended by the manual of analytical methods of the Braziliam Ministry of Agriculture, Livestock and Food Supply (MAPA). The wet digestion procedure in an open system on a hot plate presented statistically similar mean values (paired t-test) compared to the digestion performed in a closed system in a microwave digester for Cu. Otherwise, for Zn, the digestion assisted by microwave radiation was less effective, which suggested problems related to the heater program. The matrix after grinding (20 mesh) and the intermediate portion (retained in a sieve) were analyzed. Addition and recovery tests showed high recovery levels in part had on the sieve in all extractor studied solutions. The results suggest a possible matrix effect in MIP OES determinations, indicating the need to evaluate new alternatives for calibration or the use of an internal standard.
Modelos de sobrevivência induzidos por fragilidade discreta com fração de cura e riscos proporcionais
(Universidade Federal de São Carlos, 2022-10-21)
Espírito Santo, Ana Paula Jorge do
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Cancho, Vicente Garibay
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https://lattes.cnpq.br/3503233632044163
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https://lattes.cnpq.br/7428767920770482
This work presents two new survival models induced by discrete frailty with unobserved heterogeneity and proportional hazards structure, for lifetime data. The first model consider the discrete frailty variable with Katz distribution and the second with Generalized Poisson distribution, which have overdispersion, equidispersion and underdispersion properties. The new models encompasses as particular case the promotion cure rate model. The proposed model with katz discrete frailty also encompasses the mixture cure rate model and cure rate model with dispersion. Inference aspects for proposed models as discussed, in a classical approach for Katz distribution, for which the maximum likelihood tools were used and regression models were presented to evaluate the effects of covariates in the cured fraction. Furthermore, an expectation maximization algorithm for determining the maximum likelihood estimates of the parameters of the model was presented. For Generalized Poisson model, a baysean aprouch was also used, through Markov chain Monte Carlo simulation method, especifically Metropolis–Hastings algorithm. Finally, the modeling was fully illustrated on cervical cancer data sets.
Uma abordagem para predição da estabilidade transitória em sistemas elétricos de potência a partir de redes neurais artificiais
(Universidade Federal de São Carlos, 2022-10-22)
Mancini, Gabriel
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Fernandes, Ricardo Augusto Souza
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https://lattes.cnpq.br/0880243208789454
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Fernandes, Tatiane Cristina da Costa
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https://lattes.cnpq.br/2590102586758022
In an electrical network, the assessment and prediction of dynamic safety are essential to avoid interruptions in the supply of electrical energy to consumers, in addition to ensuring that the system operates reliably. Regarding the transient security assessment, predicting the behavior of the electrical power system in the post-fault period within a short time interval is essential so that preventive and, if necessary, corrective actions are taken. Traditionally, in the planning and operation of an electrical network, this study can be developed through the numerical solution of nonlinear differential equations, however, the accuracy of this analysis is limited by the capacity of representation of the model and the need for its constant updating. Considering the operation of power systems nowadays, with a continuous increase in load demand as well as the participation of energy generation sources with intermittent characteristics, this task has become increasingly challenging, increasing the degree of complexity of the mathematical model. On the other hand, the improvement of phasor measurement systems boosts the use of machine learning techniques to predict the status of the transient stability of an electrical network, among which neural networks have stood out. In view of this, the present work aims to investigate the use of artificial neural networks to predict transient stability in an electrical power system through measurements that can be easily measured by phasor measurement units, such as magnitude and voltage angle of the buses. In the proposed structure, the smallest number of measurement cycles necessary to perform the prediction is investigated, so that the behavior of the system (stable or unstable) is identified in the shortest possible time, helping the operator to make a decision. The results obtained in the IEEE 68 bus system show the efficiency of the predictor, which obtained an accuracy of 97.5% in the classification from 6 consecutive cycles of measuring the system response. When only 1 measurement cycle was provided to the predictor, a high accuracy is also achieved 96.1 % by the proposed methodology.
Predição de carga de energia elétrica no Brasil utilizando técnicas de Deep Learning
(Universidade Federal de São Carlos, 2022-10-22)
Cunha, Leticia Amaral da
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Suetake, Marcelo
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https://lattes.cnpq.br/8630323559353535
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Inoue, Roberto Santos
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https://lattes.cnpq.br/6221209121565990
The open electricity market has stood out for being a competitive and dynamic way of trading an asset that was previously restricted to passive consumption. The freedom of negotiation provided to the participants of this market makes the prediction of its price, as well as the factors that affect it, extremely important. The purpose of this study is to develop three models based on different techniques of recurrent artificial neural networks and their comparative analysis. For this, the LSTM Feed Forward, LSTM bidirectional and GRU architectures must be applied to each of the time series explored. Average electric energy load data from the Brazilian free energy market between the years 2011 to 2021 are applied as an input for training, validation and testing processes. For the evaluation of the results, metrics of wide application were used, such as mean square error and mean absolute percentage error. The analysis of the models verifies the performance of the applied techniques, as well as possible causes for the performance of the established metrics. The results showed the bidirectional LSTM and GRU types as viable modeling results