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A Geografia na formação inicial docente: percepções formativas de estudantes de Pedagogia da UFSCar-So
(Universidade Federal de São Carlos, 2021-10-26)
Silva, Edineuza Oliveira
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Soares, Marcos de Oliveira
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https://lattes.cnpq.br/4341241997702351
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Lana, Rita de Cássia
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https://lattes.cnpq.br/1816504631940006
This research is characterized as a quantitative-qualitative study of the documental case study type. Its study proposal was based on the following problem questions: what are the perceptions of Pedagogy students at UFSCar-So in relation to Geography as a specific professional knowledge? And how is this specific professional knowledge presented to future teachers? Therefore, the study drew on primary sources such as the Pedagogical Project of the Pedagogy course at UFSCar-So (2014) and the National Curriculum Guidelines for the Pedagogy course (2006), also through the analysis of a questionnaire applied to students of the course for classes 2009 to 2016. To provide the context of the study theme, a presentation was made about the training of pedagogue teachers in Brazil and that which takes place at UFSCar-So, understanding that this training needs to promote the construction of professional knowledge for educational practice, in this case, specific training focused on the area of Geography and understanding its relevance for the early years of Elementary School, analyzing the training of these professionals present in the discipline of Methodology and Practice of Teaching History and Geography. Bearing in mind the objective of the research, which was to understand the formative perceptions of students from the Sorocaba campus Pedagogy in relation to Geography as a specific professional knowledge, the analyzed documents presented a teacher training guided in the molds of the DCNs (National Curriculum Guidelines for the course of Pedagogy) and that, therefore, they present a broad and diversified formation pointed to weaknesses in the specific teacher education regarding Geography present in the formative discipline of Methodology and Practice of Teaching History and Geography, at the same time, in which the participating students they conceive formative perceptions related to observable Geography in their curricular structure in light of the weaknesses identified through the legal documents and the bibliography presented, and also what they understand as a critical and reflective teacher education of teaching practice, culminating in the appreciation of the discipline of Geography and your i importance for the early years of elementary school.
Parques urbanos: subsídios para a elaboração de instrumentos de gestão
(Universidade Federal de São Carlos, 2021-10-26)
Pinheiro, Raquel Reia
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Peres, Renata Bovo
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https://lattes.cnpq.br/6045407453925020
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https://lattes.cnpq.br/6505352273602736
Facing global climate challenges and the search for sustainable development, the creation of parks in urban areas has become a strategy to deal with these issues. Among the green areas of cities, the Urban Park is a category that has multiple benefits and functions. Therefore, instruments that aim for a better planning and management of these places are extremely relevant. Widely spread within the Conservation Units (UCs) context, the Management Plans aim to provide relevant information about the managed location, the zoning of the area, the rules of use, instructions for the management of natural resources, among other guidelines. In the city of São Paulo-SP, the “Master Plans for Municipal Urban Parks” also aim to delimit and provide fundamental guidelines for the management of these places. The mentioned contexts suggest that the search for relevant characteristics of these instruments can be useful in the construction of management documents for urban parks in general. Therefore, the objective of this research is to present subsidies for the elaboration of management instruments for urban parks. From the analysis of Methodological Guidelines for the Elaboration of Management Plans, proposed by ICMBio and by the São Paulo Environmental System, it was possible to list elements that could possibly guide the formulation of instruments focused in urban parks. Management Plans and Master Plans of Urban Parks in areas located in the city of São Paulo-SP were also analyzed and allowed the observation of factors that can be incorporated into the management of urban parks and aspects that can contribute to the development of similar instruments in other cities. The results obtained indicate that management instruments for urban parks should be designed and structured taking into account the characteristics of the area and its surroundings, promoting shared management, delimiting zones to ensure compatible uses, identifying programs and actions, defining administrative procedures and management, as well through constant monitoring to promote the adaptive management of these places.
"A verdadeira ficção faz a obra de arte": a construção das personagens artistas em 'O susto', de Agustina Bessa-Luís
(Universidade Federal de São Carlos, 2021-10-26)
Oliveira, Vinicius Hippolito Jordão
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Valentim, Jorge Vicente
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https://lattes.cnpq.br/4427303771174064
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https://lattes.cnpq.br/9011832636697892
In this Course Completion Work, we propose a reading of the novel O susto (1958), by Agustina Bessa-Luís, from the mobilization of aspects referring to the category of characters in order to understand the phenomenon of references of novelistic creatures to figures of Teixeira de Pascoaes and Fernando Pessoa. The main aim is to demonstrate in detail a narrative strategy of the author, in which external and latent traits and characteristics of the Portuguese canon are subtly introduced in the work in an allusion to two references of Portuguese poetry. This gives the novel some peculiarities with regard to the construction of characters characterized as artists. The Augustinian novel makes the textual limits of genre tenuous and intensifies the discussion about artistic creation itself, and its writing enables a metaliterary discussion about this process or even about the literature produced in Portugal in the 1950s. therefore, a reflection on the idea of the artist characters present in the work and the understanding of the art generated through them.
Potencial biotecnológico de bactérias endofíticas e rizosféricas de Paspalum spp. e nanopartículas de sílica para promoção de crescimento vegetal
(Universidade Federal de São Carlos, 2021-10-26)
Moraes, Amanda Carolina Prado de
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Fávero, Alessandra Pereira
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https://lattes.cnpq.br/4329892306148506
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Lacava, Paulo Teixeira
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https://lattes.cnpq.br/8947678349043750
Bacteria associated with Paspalum plants can be employed as biofertilizers to increase the efficiency of pastures and reduce the use of agrochemicals by converting nutrients into an assimilable form for the host plant and defense against phytopathogens. In this context, silica nanoparticles (NPs) can be a tool to increase the effectiveness of biofertilizers in the field. This study aimed to isolate, identify and characterize the endophytic and rhizospheric microbiota of Paspalum spp. for plant growth promotion and to evaluate the effect of these bacterial isolates associated with silica NPs in Paspalum notatum seedlings. The bacteria were isolated from roots, leaves, and soils of P. rojasii, P. compressifolium, and P. lenticulare and tested in vitro for biological nitrogen fixation, phosphate solubilization, indole-3-acidic acid (IAA) production, and antagonism against the phytopathogenic fungi Claviceps purpurea and Fusarium oxysporum. The bacteria with biotechnological potential were identified by the 16S rDNA sequencing, and isolates of the genera Alcaligenes, Pseudomonas, Enterobacter, and Serratia were selected for the in vivo tests in P. notatum and Poa annua. The seeds were disinfected and inoculated with treatments composed of bacteria and bacteria + F. oxysporum and placed in magenta boxes containing substrate. The seedlings were evaluated for germination rate, root and shoot length, and root and shoot dry weight. Seeds submitted to the same treatments were plated in Petri dishes with 0.7% agarose, and the seedling roots were 3,3’-diaminobenzidine stained and visualized under an optical microscope. In another experiment, 85 nm silica NPs at concentrations of 0.05 mg/mL and 0.1 mg/mL were added to the culture media of Alcaligenes sp., Enterobacter sp., and Serratia sp. A total of 11 treatments were inoculated in disinfected seeds of P. notatum and subjected to the same conditions described previously. Out of 105 isolates, 26 solubilized phosphate, fixed nitrogen, and produced IAA. Serratia sp. and Enterobacter sp. inhibited the C. pupurea growth, but none of them was antagonistic to F. oxysporum. Serratia sp. promoted significant growth of P. notatum. F. oxysporum did not inhibit the development of the seedlings, and promoted the greatest plant growth when inoculated with Enterobacter sp. However, all the seedlings inoculated with F. oxysporum exhibited thin and fragile roots and shoots. The isolates belonging to the genus Pseudomonas promoted significant growth of Poa annua. Bacteria increased the number of root hairs, and it was possible to visualize intracellular bacterial colonization in the roots. In the second experiment, the three bacterial genera without the NPs promoted the growth of P. notatum. Total germination and the highest shoot dry weight were obtained in the treatments of 0.1 mg/mL silica NPs associated with Serratia sp. and Enterobacter sp. Silica NPs associated with the three bacteria increased root length and root dry weight. Bacterial isolates from Paspalum spp. with silica NPs showed potential to be applied as nano-biofertilizers and promote plant growth in P. notatum.
Desenvolvimento e construção de um sistema de controle de uma fechadura elétrica para residências comandado por um celular
(Universidade Federal de São Carlos, 2021-10-26)
Silva, Julia Paschoal
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Barcellos, Robson
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https://lattes.cnpq.br/9844506370403162
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https://lattes.cnpq.br/0631230412481294
The present work consists in the development and construction of a prototype of an electric lock for homes, remotely controlled by cell phone using the ESP8266 NodeMcu module, a card with a Wi-Fi connection. One of the requirements is that the electric lock to be installed inside the main door of the residence, so that it is not possible to view it externally. The system contains a relay to activate the electric lock and an Android cell phone application with buttons for command to open/close the lock. The ESP8266 NodeMcu module connects via Wi-Fi to the cellphone and activates the relay through a port. Finally, sensors were installed to check whether the lock is open or closed to notify the user.
Controle postural em condições de manipulação de tarefa em crianças e adolescentes com paralisia cerebral
(Universidade Federal de São Carlos, 2021-10-26)
Costa, Laís da Cruz Reis
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Pavão, Sílvia Letícia
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https://lattes.cnpq.br/9612938688154550
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Rocha, Nelci Adriana Cicuto Ferreira Rocha
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https://lattes.cnpq.br/2035754554780009
Postural control is important for independence in the daily activities of children and adolescents and is dependent on the interaction between the visual, somatosensory and vestibular systems. In addition, the sensory system modifies the efferent motor command, regulating the musculoskeletal system, to promote voluntary and automatic actions, modulating postural control according to the demands of the environment. However, individuals with cerebral palsy (CP), as a result of lesions in the central nervous system, have motor deficits and sensory information processing deficits, which impair postural control. In many everyday situations, in which sensory inputs are reduced, such as in low light conditions and without support for the upper limbs, there may be an exacerbation of the difficulty in postural control, thus increasing the risk of falls. In view of this, the motivation to develop a systematic review arose, in order to verify sensory manipulation and synthesize its influence on postural control, updatinganexistingsystematic review. Thus, a study was carried out, entitled ''Sensory manipulation and postural control in individuals with cerebral palsy: A systematic review''. It was found that sensory manipulation can facilitate postural control when an additional visual stimulus is used, or it can cause harm when sensory information is restricted/reduced, however, the included studies did not investigate how muscle activation patterns occur, in association with the behavior of the center of pressure, during the manipulation of different sensory information. After the finalization and interpretation of the review, gaps were noticed regarding the topic and the population of interest. In this way, study II was prepared, entitled ''Postural Control in conditions of task manipulation in children and adolescents with Cerebral Palsy'' emerged, in which typical and typical children and adolescents with CP were evaluated, in order to verify the effect of four conditions (open eye with support; open eye with out support; closed eye with support and closed eye without support) on postural sway, assessed by the displacement of the center of pressure, in orthostatism; and on muscle activation, assessed by RMS and co-contraction, of the lower limbs and trunk. The results showed that the group with CP presented greater postural sway than the typical group, in all conditions evaluated. Furthermore, in the evaluation of muscle activation, it is noted that the CP group uses different strategies than the typical group to maintain postural control. Thus, these studies contribute to rehabilitation professionals, leading to reflections on how to use the manipulation of task conditions both to facilitate and to challenge postural control, depending on the objective of the therapy.
Catalisadores Ni/SBA-15 com adição dos promotores aplicados a tri reforma do metano
(Universidade Federal de São Carlos, 2021-10-27)
Luca, Eduarda Cristina Caixeta Dias de
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Assaf, José Mansur
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https://lattes.cnpq.br/9563312407691130
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https://lattes.cnpq.br/3291804329900857
Tri-reforming of methane (TRM) is a combination of steam and dry reforming and partial oxidation of methane reactions in the same reactor. Since it occurs at high temperatures and has water vapor in the reactor feed, TRM needs catalysts with thermal and hydrothermal stability, high oxygen storage capacity, resistance to carbon formation, and a high surface area. Aiming all these properties, Ni/SBA-15 catalysts promoted with CeO2, ZrO2, MgO, (CeZr)O2 were synthesized by two different synthesis methods: i) promoters impregnated on SBA-15 support which was already synthesized and calcined; ii) promoters incorporated into the SBA-15 structure during synthesis. The precursors were characterized with thermogravimetric and thermodifferential analysis, X-ray diffraction (XRD), nitrogen physisorption, temperature programmed reduction with hydrogen (TPR), temperature programmed desorption with carbon dioxide, scanning and transmission electron microscopy and X-ray photoelectron spectroscopy (XPS). The formation of the SBA-15 structure in all materials was confirmed by XRD analysis. Nevertheless, the incorporated catalysts presented a higher degree of ordering in the pores construction than in the impregnated ones. Through TPR and XPS analyses, it was verified the existence of a strong interaction between nickel and support, which is increased with the presence of promoters. The TRM catalytic tests were carried out at 750 °C for five hours, with reagents being fed into the reaction stoichiometry (3CH4:1CO2:1H2O:0.5O2). In this reaction condition, catalysts promoted with (CeZr)O2 and MgO showed the highest methane and carbon dioxide conversions. All catalysts were also subjected to TRM in water scarcity at 750 °C for five hours (3CH4:1CO2:0.1H2O:0.5O2). In this reaction atmosphere, there was an increase in carbon dioxide conversion and inhibition of methane conversion for all samples. Through thermogravimetric analysis, it was observed that the incorporated catalysts presented greater amounts of carbon depositions on their surface than in the impregnated ones. However, even generating more carbon in the incorporated ones, exhibited better stability during the five reaction hours.
Viabilidade da cultura da canola (Brassica napus L.) na bacia do Alto do Paranapanema: uma estimativa baseada em modelagem de culturas
(Universidade Federal de São Carlos, 2021-10-27)
Ferreira, Rafael Sousa
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Nassif, Daniel Silveira Pinto
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https://lattes.cnpq.br/2969535606899836
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https://lattes.cnpq.br/4789283168888538
The objective of this work was to avaliate the viability of canola (Brassica napus L.) in different municipalities in the Alto Paranapanema Basin through crop modelling. We used daily meteorological data of maximum and minimum temperatures (ºC), rainfall (mm) and global radiation (MJ.m-2.D-1) of ten municipalities in the region between 2009 to 2019 and, later, introduced in the DSSAT plataform to the determination of attainable productivity. Ten dates of sowing were simulated, spaced fifteen days, from February 15 to June 30, with the objective to understand the right sowing window of the canola in the Alto Paranapanema Basin. Finally, data was spatialised with Quantum Gis software (QGis 3.18). Even though these simulations are far from productivity indices of traditional countries in canola production, as Canada, at the national level the region can be an exponent of production, with average attainable productivity on the best sowing dates, between April 15 to 15 June, of 1.492,85 Kg.ha¹ and average standard deviation of 139,60. This shows the potential of canola in the Alto Paranapanema Basin region, and should therefore have investments to quantify and, subsequently, increase agricultural productivity.
(In)segurança hídrica e o desafio de viver e produzir no PDS Sepé Tiaraju, SP
(Universidade Federal de São Carlos, 2021-10-27)
Lucati, Leticia Bolonha
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Norder, Luiz Antonio Cabello
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https://lattes.cnpq.br/0080353709980071
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Borges, Janice Rodrigues Placeres
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https://lattes.cnpq.br/2373278362705384
The water management in the settlements of the brazilian Agrarian Reform is a topic of great relevance and always current, due to its complexity and developments. Amidst the current environmental crisis, therefore, debates about the importance and process of water scarcity are even more present. Recognizing the importance of water for domestic and productive uses, this work sought to describe the characteristics related to water supply and management in the SDP Sepé Tiaraju, by the own settlers, through their speeches. The study area is located on the recharge area of the Guarani aquifer, in the cities of Serra Azul and Serrana. The settlement is an example of agroecological production amid the highest concentration of sugarcane in Brazil. Questions about the sources of supply, distribution and uses of water in everyday life were adressed. To understand the experiences of farmers related about the water, qualitative and quantitative approaches were chosen, through the application of questionnaires and semi-structured interviews with 10 farmers from all nucleus of the settlement. Data analysis was performed based on the interdisciplinarity that the central theme requires. The results indicate that problems related to water supply and its multiple uses have existed for years on SDP, pointing to a situation of human and productive vulnerability over all the life cycles of the settlement, which goes against the construction of the guiding principles of the SDP modality: the construction of a rural settlement model, in which Agroecology is the center of the technological matrix. It is considered urgent the strengthening of public policies aimed at water supply for family farming, as well as basic sanitation in general.
In-Network IdentifiCation and chAining: um mecanismo de identificação de tráfego e encadeamento no plano de dados
(Universidade Federal de São Carlos, 2021-10-27)
Matos, Guilherme Mendes Vieira de
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Verdi, Fábio Luciano
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https://lattes.cnpq.br/9143186843657940
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https://lattes.cnpq.br/6268889758612468
Inside the 5G Core (5GC) a myriad of (virtual) functions may be deployed so that different treatment can be given for traffic coming in and out to/from the Radio Access Network (RAN). One of these key functions is Service Function Chaining (SFC) supported by SRv6 state-of-the-art protocol. In this work, we present an SFC P4-based solution for traffic identification and chaining using SRv6. We call this function In-Network Classification and chAining (INCA), which is deployed entirely in the data plane using a Netronome Agilo SmartNIC. The INCA is deployed just before the User Plane Function (UPF) inside the 5GC and is capable of observing the traffic coming from and going to the RAN so that it classifies and creates the proper sequence of services to be followed by every specific flow. Our results show that INCA performs the task of packet classification and chaining perfectly with a minimal Flow Completion Time (FCT) impact when compared to the same environment without it.
Avaliação das praças públicas: perspectivas das dinâmicas urbanas e políticas públicas de lazer nas praças da poligonal histórica de São Carlos - SP
(Universidade Federal de São Carlos, 2021-10-27)
Navarro, Marcos Rogério
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Oliveira, Celso Maran de
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https://lattes.cnpq.br/9911833172043700
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https://lattes.cnpq.br/5290919962396662
Leisure, as one of the social functions of the city, plays an important role in the health of the population, but has suffered interference along the modifications of the postmodern urban layout. Urban fragmentation and monofunctional zoning tend to reduce public spaces as commuting circuits, wich directly affect the quality of spare time, especially for low-income citizens. As a result, the emptying of the center of the city at times that exceed comercial hours, keeps the population away from staying in places intended for leisure. In this sense, the pesent study, based on the combination of bibliographical research,case study and quali- quantitative analysis model, we sought to assessthe appropriation of te squares in the Historical Polygonal of São Carlos, bringing to light the importance of leisure as a social function of the city and as a fundamental right to the citizens. An on-line interview was requested, via google forms, and the responses were combined with what the literature offers. Through the results obtained, it was possible to observe that little has been done so that the spaces aren’t updated to human needs. It was seen that the available equipment does not correspond to the expectations of the population in order to garantee the social right to leisure in the region. There is a large number of banks, disproportionate to the number of dumps, large ways to walk, but few opportunities for stationary activities. It is expected that the approached methodology will erve as a motto for future studies, both in diferente regions of the municipality, as in other médium cities, with a view to reduce socio-envvironmental diferences and ensure orderly and sustainable development.
Desenvolvimento de métodos de pré-concentração para a determinação de elementos traço e especiação de cromo e arsênio em amostras agrícolas
(Universidade Federal de São Carlos, 2021-10-27)
Sá, Ívero Pita de
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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/6816569547529443
Agricultural sustainable production is indispensable to meet the growing demand for food and nutritional control. The risk assessment associated with contamination by toxic elements in agricultural and aquaculture matrices are essential. In this context, the present thesis evaluated new methodologies for pre-concentration and chemical speciation methods using different determination techniques, such as microwave-induced plasma optical emission spectrometry (MIP OES), liquid chromatography associated with inductively coupled plasma mass spectrometry (LC-ICP-MS), flame atomic absorption spectrometry (FAAS) and spectrophotometry (UV-VIS) for analysis of fish and organic fertilizer samples. Solid-phase extraction (SPE) for As, Cd, Cr, Cu, Hg, Pb and Zn determination in meat and fish, and co-precipitation for As and Cd determination in fish were the pre-concentration procedures used to increase the sensitivity of the MIP OES. Experimental planning was applied to optimize the methods, being the trueness evaluated with analysis of certified reference materials (CRMs) and comparison with another instrumental technique, ICP-MS. The values found agreed with reference values, demonstrating the feasibility of the methods. The chemical speciation of As and Cr in fish was performed by LC-ICP-MS, and the extraction of the species was defined using experimental designs. The trueness of the procedures was verified by the analysis of four CRMs and with addition and recovery experiment. Finally, a method for speciation of Cr(VI) in organic fertilizer was developed. The method proved to be adequate for determination by FAAS and UV-VIS. It provided limits of detection of 1.4 and 1.8 mg/kg, respectively, lower than 2.0 mg/kg, the maximum value allowed by the Brazilian regulation. The trueness of the method was evaluated using two CRMs and the addition and recovery technique.
Controle de espécies de Poaceae e Convolvulaceae através de herbicidas aplicados em solo e palha e sensibilidade de mudas pré-brotadas de cana-de-açúcar
(Universidade Federal de São Carlos, 2021-10-27)
Santos, Paulo Henrique Vieira dos
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Monquero, Patricia Andrea
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https://lattes.cnpq.br/2766526793830455
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https://lattes.cnpq.br/0777721363131617
The implementation of the practice of raking straw in sugarcane fields resulted in heterogeneous distribution or total removal of straw in the areas. And these different amounts of straw can influence the floristic composition of weeds, resulting in a mixed flora, and the dynamics of herbicides applied under pre-emergence conditions. Then, the objective of this research was to test the hypothesis that pre-emergence herbicides applied in different amounts of sugarcane straw result in eficiente control and mass reduction of Urochloa decumbens (Stapf) R.D.Webster, Digitaria horizontalis Willd., Cenchrus echinatus L., Ipomoea triloba L. and Merremia aegyptia (L.) Urb and also to evaluate the sensitivity of sugarcane pre-sprouted seedlings (PSS) to herbicides applied in pre-planting. Weed control experiments were conducted in greenhouse, in a completely randomized design (CRD) in a 11+1 x 5 factorial scheme with four replications for each of the five weed species (Cenchrus echinatus, Urochloa decumbens, Digitaria horizontalis, Ipomea triloba e Merreia aegyptia) interacting with the herbicides isoxaflutole, clomazone, sulfentrazone, indaziflam, amicarbazone, tebuthiuron, s-metolachlor + [diuron + hexazinone], imazapic, amicarbazone + tebuthiuron, indaziflam + metribuzin e [indaziflam + isoxaflutole] and a control treatment and five different amounts of sugarcane straw (0, 2, 6, 8 e 10 t ha-1) with four replicates for each treatment. The experimental units were evaluated for the efficacy of control at 35 days after emergence (DAE) of the controls, when the plants were cut to obtain the dry mass of the aerial part (DMAP). The sensitivity experiment of sugarcane pre-sprouted seedlings was conducted in a greenhouse, in a completely randomized design (CRD) with the variety RB966928 receiving the application of the same herbicides used in the control experiment and four replicates for each treatment. The experimental units were evaluated for phytotoxicity weekly, number of leaves and height at the time of application and 63 days after application (DAA), when the seedlings were cut to obtain dry mass of the aerial part (DMAP). As for weed control experiments, it was observed that s-metolachlor + [diuron + hexazinone] and indaziflam + metribuzin satisfactorily control C. echinatus, U. decumbens and D. horizontalis, as well as sulfentrazone, tebuthiuron and amicarbazone + tebuthiuron satisfactorily control I. triloba and M. aegyptia, when applied in pre-emergence directly to the soil or sugarcane straw, reducing plant DMAP, on average, 95 and 98%, respectively. For the sensitivity experiment of pre-sprouted seedlings, different levels of tolerance of RB966928 to the herbicides used were observed, however, the use of clomazone, indaziflam, sulfentrazone and tebuthiuron, at 63 DAA, resulted in recovered plants and no changes in biometric parameters evaluated. The application of sulfentrazone in pre-planting of PSS, variety RB966928, is safe and efficient in the control of C. echinatus, U. decumbens, I. triloba and M. aegyptia.
Solidificação, desenvolvimento microestrutural, propriedades mecânicas, elétricas e de corrosão de ligas Al-Si(-Ag)
(Universidade Federal de São Carlos, 2021-10-27)
Gomes, Leonardo Fernandes
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Spinelli, José Eduardo
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https://lattes.cnpq.br/8882038118634925
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https://lattes.cnpq.br/6904883156193838
In the last years, the development of new light and efficient systems in electric vehicles (EV) opens up new research opportunities. Besides that, the need for internal combustion engine components with optimized properties is also attracting interest. One of these challenges involves the development of alternative Al-Si based alloys. Under such context, the microstructure of Al-Si alloys can be modified with addition of alloying elements in order to improve properties such as tensile strength, corrosion resistance and electrical conductivity. This PhD research focuses on better understanding of the effects of Ag additions: 0.1 and 2.0wt.% and cooling rate variations on dendritic growth and eutectic formation constituting Al-5wt.%Si and Al-10wt.%Si alloys. Thermodynamic simulations (ThermoCalc) were performed to support the extensive microstructural evaluation. A complete set of characterization including monitored solidification experiments, tensile tests, electrical conductivity, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), immersion tests, optical microscopy (OM) and scanning electron microscopy (SEM) was developed. The Al-5wt.%Si-0.1wt.%Ag and Al-10wt.%Si-0.1wt.%Ag alloys showed the best combined results for tensile properties / electrical conductivity, resulting in 142 MPa / 22% / 29.4 %IACS and 160 MPa / 12 % / 29.6 %IACS, respectively. Ag-containing having 2.0wt.% alloys resulted in slightly higher mechanical properties and lower electrical conductivity. Furthermore, the Al-5%Si-0.1%Ag and Al-10%Si-0.1%Ag alloys showed the best corrosion performance compared to the ternary compositions with equivalent Si and higher Ag content, resulting in lower corrosion rate, higher passive range, and greater polarization resistance. In the matter of the Al-10wt.% Si-Ag alloys, the microstructure refinement tends to increase the corrosion rate and to enhance the sample’s nobility.
Ações de Z2k com o conjunto de pontos fixos conexo e a propriedade CP
(Universidade Federal de São Carlos, 2021-10-27)
Moraes, Renato Monteiro de
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Pergher, Pedro Luiz Queiroz
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https://lattes.cnpq.br/3328545959112090
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https://lattes.cnpq.br/6491436523621062
It is well known that if $\phi:G \times M^m \rightarrow M^m$ is a smooth action of a compact Lie group on a closed smooth manifold, then its fixed point set $F_{\phi} = \bigcup\limits_{i=0}^{n}F^{i}$ is a disjoint union of closed submanifolds of $M^m$, where $F^i$ denotes the union of $i$-dimensional components of $F_{\phi}$. In this way, given a compact Lie group $G$ and a union of closed smooth manifolds $F = \bigcup\limits_{i=0}^{n}F^{i}$, we can ask ourselves if exists such a $G$-action defined on a closed smooth manifold $M^m$ whose fixed point set is $F$. In this work, we discuss this problem for the cases where $G=\mathbb{Z}_2$ with $F=P(m,n) \cup \{point\}$, here $P(m,n)$ denoting a Dold manifold (see \ref{ExemploDold}) and $\{point\}$ is a unique point; and $G=\mathbb{Z}_2^k$ with $F=F^n$ or $F=F^n \cup F^{n-1}$ with $F^n$ and $F^{n-1}$ being connected. Here, $\mathbb{Z}_2^k$ is considered as the group generated by $k$ commuting involutions $T_1, \ldots, T_k$. Another question is concerning the CP property: more specifically, we say that a closed smooth manifold $F^n$ satisfies the CP property (compatible with the point) if there exists an involution $T:M^m \rightarrow M^m$ whose fixed point set is $F^n \cup \{point\}$. In chapter 3 we prove that the Dold manifolds $P(2^t-2,1)$ and $P(2,2^s-1)$ satisfy the CP property for all $t,s>1$. On the other hand, we will see that $P(m,n)$ do not satisfies CP for certain values of $m$ and $n$ (see the Introduction for details). This property was introduced in \cite{TeseJessica}, where several correlated results were obtained. In \cite{StongKos} Stong and Kosniowisky showed that if the fixed point set of an involution $(M^m,T)$ has only $n$-dimensional components and $m>2n$, then $(M^m,T)$ bounds equivariantly. In the same work, they proved that, if $m=2n$, then $(M^m,T)$ is equivariantly cobordant to the twist involution $(F^n \times F^n, \tau)$ where $\tau(x,y) = (y,x)$. In \cite{Onzedoiska} Pergher extended this result for $\mathbb{Z}_2^k$-actions $(M^m,\phi)$ whose fixed point set $F^n$ is connected. More specifically, he showed that, under these fixed point set conditions, if $m > 2^k n$, then $(M^m,\phi)$ bounds equivariantly, and if $m=2^k n$, then $(M^m,\phi)$ is equivariantly cobordant to the $\mathbb{Z}_2^k$-twist (see definition \ref{Z2ktwist}). In \cite{stongclass} Stong realized the classification of all cobordism classes of involutions $(M^m,T)$ whose fixed point set has only n-dimensional components and $m=2n-1$. In \cite{zedoisdois} Pergher extended this result for $\mathbb{Z}_2^2$-actions $(M^m,\phi)$ whose fixed point set $F^n$ is connected, with $m=4n-1$ and $m=4n-2$. In chapter 4 we extend this work of Pergher for $\mathbb{Z}_2^k$-actions by determining all possible cobordism class of $\mathbb{Z}_2^k$-actions whose fixed point set $F^n$ is connected and $2^k n-2^{k-1} \leq m < 2^k n$. The fixed-data of a $\mathbb{Z}_2^k$-action $(M^m,\phi)$ fixing $F$, denoted by $(F,\{\xi_{\rho}\})$, is $F$ with a list of $2^k-1$ vector bundles over $F$, where the vector bundles $\xi_{\rho}$ are obtained by a decomposition of the normal bundle of $F$ in $M^m$. In \cite{zedoisdois2}, P. Pergher and F. Figueira showed the following result: let $(M^m,\phi)$ be a $\mathbb{Z}_2^2$-action with fixed-data $(F^n;\xi_{\rho_1},\xi_{\rho_2},\xi_{\rho_3}) \cup (F^{n-1};\mu_{\rho_1},\mu_{\rho_2},\mu_{\rho_3})$, and suppose that there are at least two vector bundles in $\{\xi_{\rho_1},\xi_{\rho_2},\xi_{\rho_3}\}$ that have dimension greater than $n$, and at least one $\mu_{\rho}$ has dimension greater than $n-1$. Then $(M^m,\phi)$ bounds equivariantly. In that paper, the authors proposed the following generalization for $\mathbb{Z}_2^k$-actions: \textbf{Conjecture:} Let $(M,\psi)$ be a smooth $\mathbb{Z}_2^k$-action with fixed-data $(F^n, \{ \xi_{\rho} \}_{\rho}) \cup (F^{n-1}, \{ \mu_{\rho} \}_{\rho})$. Suppose that at least $2^{k-1}$ $\xi_{\rho's}$ over $F^n$ have dimension greater than $n$ and at least one $\mu_{\rho}$ has dimension greater than $n-1$. Then $(M,\psi)$ bounds equivariantly. This is the main result of chapter 5 of this thesis. But we achieved the following improvement of the above conjecture: the condition that at least one $\mu_{\rho}$ has dimension greater than $n-1$ can be removed.
O Quilombismo de Abdias Nascimento: fundamentos para uma educação antirracista
(Universidade Federal de São Carlos, 2021-10-27)
Rocha, Fabiana de Oliveira Maciel
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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/9837678438894066
The following master's thesis aims to investigate the assumptions of Abdias Nascimento's thought, the ideals and proposals that point to actions for an anti-racist education. This is done from considerations of the work O Quilombismo ([1980] 2019) based on what advocates the teaching of Afro-Brazilian and African history resuming the quilombist precepts defended by the author. The object of study is composed of an analysis of the potentialities of the term Quilombism produced by Abdias together with a qualitative bibliographical study of the author's production. The dissertation is inserted in the field of historiographical studies about the history of intellectuality, a branch of the history of mentalities that focuses on the history of thoughts and ideas. We outline as a hypothesis the observation of a projection of Abdias' proposal to fight racism, having education as a platform for action. In other words, the fight against racism for Abdias would occur through education by incorporating assumptions of Quilombism. Under such reading, it can be affirmed that Quilombism is a creation from the black diaspora whose application in education can project the constitution of an antiracist education.
Influência do estresse na qualidade do sono de idosos da comunidade
(Universidade Federal de São Carlos, 2021-10-28)
Guiesi, Pedro Henrique Machado
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Orlandi, Ariene Angelini dos Santos
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https://lattes.cnpq.br/1334146454214813
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Inouye, Keika
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https://lattes.cnpq.br/7558935747100052
Sleep is a vital function that has a restorative and regulatory action on organic systems. Several studies indicate that sleep is negatively modified with aging. Stress leads to a state of alarm, resistance and exhaustion with physical and emotional changes. Considered a variable that, like aging, can bring about changes in sleep patterns. The present study aimed to identify the association between stress and sleep quality in community-dwelling elderly. This is a research with a quantitative, descriptive and transversal design. The sample was found by elderly people registered in Family Health Units in the city of São Carlos, São Paulo. Data collection was performed according to the application of a sociodemographic and health characterization questionnaire (this will include the use of sleeping medications, physical activity, weekly physical activity time, period of activities and comorbidities), Scale of Geriatric Depression (GDS-15), Perceived Stress Scale and Pittsburgh Sleep Quality Index (PSQI). Descriptive and comparative statistical analyzes were performed. The sociodemographic profile of the sample was young (M=69.88; Md=70.00; SD=6.92). Education was low (M=3.03; Md=3.00; SD=2.92). Individual and family income were less than 1.5 and 2.5 minimum wages, respectively (individual income: M=1201.87; Md=998.00; SD=886.50; family income: M=2328.39; Md=2000.00; SD=1121.93). The elderly were predominantly female (54.4%, n=67), married (92.7%, n=114), mulatto or brown (68.3%, n=166), Catholic (53.7%, n=66), retired (79.7%, n=98) and with a perception of insufficient income to meet the demands of daily life (57.7%, n=71). Regarding the variable presence of comorbidities according to sleep quality, the analyzes showed differences in the quality of sleep of elderly people with arterial hypertension (p=0.019), arthritis (p=0.026), anxiety (p=0.000) and depression (p =0.006). The total score related to poor sleep quality was significantly higher among the elderly with high stress (Low stress group: M=6.05; Md=6.00; SD=3.28; High stress group: M= 9.06; Md=9.00; SD=4.29) (U=1117.50, p=0.000). Analysis of covariance revealed that there is an effect of depressive symptoms on overall sleep quality scores [F (1, 120)=6.381, p=0.013]. However, even considering depressive symptoms as a covariate, the difference in sleep quality according to the level of stress remained significant [F (1, 120)=5.820, p=0.017]. It is concluded that high levels of stress lead to worse sleep quality.
Uma reflexão sobre terminalidade assistida em contexto de vulnerabilidade social
(Universidade Federal de São Carlos, 2021-10-28)
Souza, Helenira Porfírio de
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Peggion, Edmundo Antonio
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https://lattes.cnpq.br/9849805103860827
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https://orcid.org/0000-0001-9056-9417
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https://lattes.cnpq.br/0992128488268186
The assistance in dying consists of promoting relief from pain or any discomforts coming from the process of dying, which might last for a considerable amount of time, such as months or years. Aiming to understand this assistance paid to the dying, in a configuration apparently atypical from the ones described in the specialized literature, a survey was carried out, based on biographic data of the founder of the institution and also of people who are, in any manner, involved with the modality of aiding in end-of-life situations named as Palliative Care, which the institution observed presents itself as an adept. The change in paradigm at the assistance in dying in Brazil was explored as a reference to the construction of the aforementioned aid in dying and to the national and international contributions for the promotion of death under favorable conditions. The experiences found, demonstrate the impossibility of the application of the theory under determined conditions, such as the accompaniment of death of people assisted by the State in life. This fact explains and justifies the initiative of offering aid to people under conditions that are incompatible with life, granting them at least the possibility of a proper closure to life within the material conditions and the context in which the institution and its idealizer are inserted.
Identidades polinomiais para a álgebra de Jordan das matrizes triangulares superiores 2x2
(Universidade Federal de São Carlos, 2021-10-28)
Salomão, Mateus Eduardo
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Gonçalves, Dimas José
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https://lattes.cnpq.br/1668407948840456
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https://lattes.cnpq.br/9042467665583924
Let K be a field (finite or infinite) of char(K) ≠ 2, and let UTn = UTn(K) be the n x n upper triangular matrix algebra over K. If · is the usual product on UTn, then with the new product a ○ b = (1/2)(a·b + b·a), UTn becomes a Jordan algebra, denoted by UJn = UJn(K). In this thesis, we describe the set I of all polynomial identities of UJ2 for any K, and we prove that I has the Specht property when K is infinite, namely that, I and every T-ideal containing I, is finitely generated as a T-ideal. Moreover, we describe the set of all Z2-graded polynomial identities of UJ2 with any Z2-grading, and we describe a linear basis for the corresponding relatively free Z2-graded algebra.
Comparando o efeito de contingência de grupo independente e interdependente sobre o desempenho escolar em matemática
(Universidade Federal de São Carlos, 2021-10-28)
Gois, Nayara de Souza
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Brino, Rachel de Faria
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https://lattes.cnpq.br/0235133592567485
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Carmo, João dos Santos
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https://lattes.cnpq.br/1263046410329694
The present research replicated studies in social behavior ((Lloyd, Eberhardt & Drake, 1996; Pigott, Fantuzzo, Heggie & Clement, 1984), focusing more specifically on assessing outcomes produced by different group contingencies. Group contingencies are effective in modifying unwanted behaviors and increasing school performance. The aim of the present study was to compare an independent and an interdependent group contingency on the frequency of correctly answering math exercises. Twenty students, both genders, from fourth grade of Elementary School (Cycle 1), from a public school, in a city in the interior of São Paulo, participated in the study. Participants were divided into five groups and each group member performed math exercises with 60 addition and subtraction operations (all exercises were numerical) over a period of ten minutes per session. Reverse designs (ABCA) were used for three groups (Groups 1, 2 and 3), and (ACBA) for the other two groups (Groups 4 and 5). The A condition served as a baseline and no reinforcers were offered. ln B condition, reinforcers were provided by individual performance, required in the group activity. ln condition C reinforcers were provided based on the average performance of the group activity. The results of the present study show that averages of the frequency of correct answers for conditions B and C were higher than for conditions A. However, the participants did not have differences related to means and standard error between conditions B and C.