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Estudos de poligalacturonases do fungo mutualista Leucoagaricus gongylophorus
(Universidade Federal de São Carlos, 2014-08-12)
Golfeto, Camilla Calemi
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Souza, Dulce Helena Ferreira de
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https://lattes.cnpq.br/3428955299526003
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https://lattes.cnpq.br/9969351629353020
Polygalacturonases (PGases) are enzymes which hydrolyze glycosidic linkages - 1,4 between pectic acid residues, and are produced by plants, fungi, bacteria and yeasts. The fungus L. gongylophorus, Atta sexdens ant mutualist, secretes enzymes with PGase activity. The project was developed in two approaches: study with recombinant and native PGase. The activity on polygalacturonic acid of native PGase in fungus culture medium was determined, and its purification from crude extract was performed by (NH4)2SO4 precipitation and molecular exclusion chromatography. PGase kinetic parameters (Vmax and KM), optimal pH and temperature were determined, and the enzyme was immobilized on magnetic particles, proved to be a good method to future work inhibitors search. A cDNA library was constructed from total RNA obtained from L. gongylophorus culture in induction medium. 816 clones from the library were sequenced, allowing the identification of enzymes sequences involved in the plant cell wall degradation, some already in cloning and expression in our laboratory. Using a deposited L. gongylophorus PGase (PGase-Lg) sequence (GenBank: ADV30326.1), primers were designed to amplify the PGase-Lg gene, with cleavage sites for EcoRI, HindIII and NotI enzymes, respecting the pETSUMO (for E. coli expression) and pPICZA (for P.pastoris expression) reading phase vectors. From the cDNA, the PGase-Lg ORF encoding was amplified by PCR and cloned in both vectors. The clones were confirmed by plasmid DNA extraction and PCR. E. coli expression experiments of pETSUMO-PGase-Lg construction showed a great expression of His.tag-SUMO.tag-Lg-PGase fusion protein in the insoluble form and many expression and solubility assays were inefficient in solubility of expressed fusion protein. The protein refolding was performed and this was obtained in soluble form but lacks PGase activity, showing that folding may not have been correctly or E. coli fusion protein expressed does not undergo post-translational modifications to have enzymatic activity. The rPGase-Lg expressed in P. pastoris showed PGase activity on polygalacturonic acid and electrophoresis analysis suggest more than one enzyme expression, with different glycosylation content.
Alteridade e alienação: os impasses da intersubjetividade na filosofia de Sartre
(Universidade Federal de São Carlos, 2014-08-12)
Santos, Vinícius dos
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Marques, Silene Torres
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https://lattes.cnpq.br/4822141288006918
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https://lattes.cnpq.br/1422927411438060
From the consciousness that comes across the objectification of the other s gaze in Being and nothingness, to the social life practical reciprocities of Critique of the dialectical reason, Sartre s thought is increasingly taken by a deepened reflection about the otherness. In fact, over the years, sartrean theory is gradually characterized by the challenge of explaining the nuances of intersubjectivity, permanently supported in the major axis of his work: freedom. However, this movement will never be ease the dialog with Marx, for instance, being the climax of this tension. That s why its investigation becomes a prime key to understand the entirety and the depth of his work which also means to point its potential explanatory limits and its intrinsic contradictions. In this sense, the goal of the thesis is critically inquire the conceptual nexus of Sartre s philosophy, its force lines and its weaknesses, from the point of view of the otherness. In doing so, we intend to reveal the impasses caused by the problem of the other in the sartrean thought, which is concentrated in the essential, never changed conception of the original experience of the otherness as alienation. In other words, our proposal is to discuss the assimilation between otherness and alienation throughout sartrean s work.
Composição da fauna de mamíferos não voadores presente em um remanescente florestal no munícipio de Ribeirão Bonito, São Paulo
(Universidade Federal de São Carlos, 2014-08-13)
Dias, Willian Alexandre Ferreira
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Garavello, Júlio César
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https://lattes.cnpq.br/2778105126670170
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https://lattes.cnpq.br/8906511795425295
The São Paulo State is suffering an urban and rural expansion that has been causing fragmentation and isolation of Cerrado domain in forest remaining. Most of these occupied areas in São Paulo State have put the vertebral animals, mainly the mammals, in danger. The aim of this study was do the mastofauna survey present in a forest fragment with 260 ha located in Ribeirão Bonito municipality in this State, relate this fauna with the vegetation that compose the forest fragment and collect biological data and information about mastofauna conservation. Were performed 33 field visits for the sampling and the methodology consisted in mammals observations and capture. The observations were made by active search, allowing research mammals of medium and large size, and the mammals capture utilized pitfall for small mammals study, both carried out in the period between February 20013 and January 2014. The studied fragment can be classified as a transition area among Cerradão and Semideciduous forest, where were identified 114 plant species. Were identified 16 species of non-flying mammals of various sizes, ranging from small to large, and grouped in 10 families (Didelphidae, Canidae, Felidae, Procyonidae, Dasypodidae, Cricetidae, Hydrochoerinae, Cervidae, Tapiridae and Atelidae) belonging to seven orders (Didelphimorphia, Carnivora, Cingulata, Rodentia, Artiodactyla, Perissodactyla and Primates). Among this species identified in the study area, highlight sensitive species to anthropic pressure like Tapirus terrestris e Lycalopex vetulus. Analysis showed influence of plant species composition and richness in the distribution of small mammals within the forest fragment studied.
Mineração de genes em regiões genômicas bovinas associadas à resistência ao carrapato Rhipicephalus (Boophilus) microplus
(Universidade Federal de São Carlos, 2014-08-13)
Catoia, Vitor
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Regitano, Luciana Correia de Almeida
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https://lattes.cnpq.br/8745400308294828
The Brazilian cattle industry is presented as highlighted on the world stage and the significant participation of this productive sector in the economy means that there is concern with production losses, among which stands out those caused by infestation of Rhipicephalus (Boophilus) microplus, main ectoparasite vector cattle and various diseases. The genetic variability for resistance to the cattle tick shows that this trait can be genetically improved. For the execution of this work, it was used a study of genome wide association (GWAS) for resistance to Rhipicephalus (Boophilus) microplus, performed by Dr. Fernando Flores Cardoso, with 260 Hereford and 500 Braford animals. The monitoring of the infestation was accomplished by counting tick females larger than 4.5 mm from one of the animal's body side, and the degree of infestation was evaluated for each animal by averaging at least two consecutive counts, with intervals of approximately thirty days, in the months of highest incidence of the parasite. The animals were genotyped using a 50K SNP chip, and it was found a total of 37,346 SNPs that passed in quality test. Among these markers, 178 showed significant effects and allowed the mining of 175 genes in these regions, at an interval of 200 Kb (100 Kb for each side of each marker). Most of these polymorphisms associated with the trait is located in regions without defined functions (intronic and intergenic), and only one of them is located in the splicing region. The most significant regions of the GWAS were identified on chromosomes 7, 21 and 23, which were found 72 genes in linkage disequilibrium with the molecular markers. Therefore, a functional annotation of the genes on these 3 chromosomes was performed, allowing the choice of 11 candidate genes for the study of various metabolic pathways in which they are inserted. Among these pathways, the most important are those related to immune responses, secretion and intracellular transport, calcium influx and epidermal growth and differentiation.
Exemplos de T-espaços e T-ideais infinitamente gerados
(Universidade Federal de São Carlos, 2014-08-14)
Urure, Ronald Ismael Quispe
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Gonçalves, Dimas José
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https://lattes.cnpq.br/1668407948840456
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https://lattes.cnpq.br/6520475883577474
Let F be a field of characteristic p ≥ 3. Denote by F0(X) and F1(X) the free associative algebras without and with unity, respectively, freely generated by the infinite set X. In this dissertation we study T-spaces and T-ideals infinitely generated. In [2] the mathematicians Aladova and Krasilnikov exhibited in F0(X) a T-ideal infinitely generated that contains the polynomial x2p. In [9], the mathematicians Goncalves, Krasilnikov and Sviridova exhibited in Fi(X) limits T-spaces when F is infinite. The objective of this dissertation is to study the results of the two papers cited above.
Produção de sentidos e de significados de estudantes do ensino médio sobre o conceito de volume e capacidade de prismas
(Universidade Federal de São Carlos, 2014-08-14)
Magalhães, Marcos Hirota
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Sousa, Maria do Carmo de
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https://lattes.cnpq.br/6637658562543505
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https://lattes.cnpq.br/5031532275444654
The objective of this research is to analyze the production of feelings and meanings that high-school students experience when enrolled in activities related to the concept of the Prisma Volume. The activities were organized by the teacher and considered the contents of composition and decomposition of figures. During the development of the manipulatives activities, for example, the golden material was used. Acrylic prisms were also used so that students could manipulate and calculate their volumes. The research is qualitative and can be characterized as a Case Study. The question guiding this study is: what are the feelings and the meanings that can be produced by high-school students when they experience educational activities while studying the concept of Materials Volume? The survey was conducted in a private school in São Carlos-SP, where classes were filmed and, after the development of activities, an analysis of their speeches and writings was held based on the interactions within the classroom with the teacher s mediation. Students performed three activities in thirteen classes, which were divided didactically, to be analyzed in the form of teaching episodes. Thus, information that enabled the understanding of what is interpreted to be the production of feelings and meanings made by students were pooled. Results suggest that the production of feelings and meanings explicited by the students are related to the skill of spatial visualization of the prism and its constituent elements, such as: measurement, size, composition area and perimeter.
Who Am I? uma arquitetura para a coleta, modelagem e oferta de perfis de usuários para a computação ubíqua
(Universidade Federal de São Carlos, 2014-08-14)
Alencar, Tatiana Silva de
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Almeida, Vânia Paula de
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https://lattes.cnpq.br/0268728255033469
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https://lattes.cnpq.br/0149606919335608
One of the core requirements of Ubiquitous Computing is to be user context aware for software solutions developed may be adapted to the different skills and capabilities of users, with regard to physical and cognitive characteristics and interaction preferences. However, the focus of research has been in adapting the systems to different devices. The adaptation to different users profiles still demands further investigation, especially on how to understand and model the physical and cognitive characteristics, and users preferences. It is possible to find several studies that present user profiles models in the literature. Some of these models include a large set of features related to the users. However, only a few works provide an indication of how the information about the user is captured and how the profile already mapped in the model is turned available for applications. Moreover, these models do not take into account the user's interaction needs and preferences, since they only focus on personal information, physiological state, demographics etc. Thus, this work aims to support the flexibility of ubiquitous systems, considering different user profiles, facilitating the collection and delivery of these profiles for ubiquitous computing. To achieve this goal we defined the "Who Am I?" architecture to meet the users diversity by considering their interaction needs and preferences as part of the adopted user profile model; enables the collection of user profiles by means of a collector; and allows communication between the collector and the ubiquitous systems of an interoperable manner. To evaluate the feasibility of this architecture and verify that it meets the diversity of users, a case study was conducted with two scenarios of use. In the first scenario, a bus stop system and the second, a simulation for a smart kitchen was developed. The evaluation of the two software solutions developed was performed with real users and included both technical and emotional aspects. The results indicate that the interaction with both solutions through "Who Am I?" architecture gave satisfaction and motivation in users, and that communication and the adaptation of ubiquitous systems are given appropriately.
Efeito fundador em populações de cativeiro: o caso do urso de óculos (Tremarctos ornatus Cuvier, 1825) e seu significado para o manejo e futura conservação ex situ
(Universidade Federal de São Carlos, 2014-08-14)
Corrêa, Mariana Coletto
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Galetti Júnior, Pedro Manoel
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https://lattes.cnpq.br/7398754661670478
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https://lattes.cnpq.br/5069534293364740
Species kept in captivity are of great importance for in situ conservation of natural populations. In order to fulfill this role, they need to be properly managed with the aim to avoid the consequences of a captive environment, such as: loss of genetic diversity, inbreeding depression, accumulation of deleterious alleles and genetic adaptation to captivity (the first three due to the small number of breeding stock). Thus, with the aim to test founder effects in captive ―populations‖, we used as study model the spectacled bears from Brazilian zoos. This ―population‖ consists of twenty-one bears found in eight zoos along the country, which are originated from just twelve founding individuals. To test a possible founder effect, we analyzed twelve heterologous microsatellite loci for all the specimens of the species in Brazil. Results for the number of alleles and allelic richness obtained through the rarefaction method showed that spectacled bears in captivity have reduced levels of allelic richness in relation to three natural populations (Colombia, Ecuador and Venezuela) studied by other authors; suggesting that bears from Brazilian zoos suffered the consequences of a founding effect, as they have only a fraction of the gene pool of the ancestral population. From the information present in the studbook was possible to verify that there are two families of spectacled bears, and according to the individuals´s multilocus genotypes, we found alleles that are present in a same family and absent in the other. Regarding the kinship, there was a discrepancy in the results with the molecular estimators through the softwares ML-Relate and Coancestry and the information given by the institutions. The information obtained in this work are fundamental to the ex situ conservation program in Brazil with the objective of maintain as high as possible the genetic diversity for future reintroduction plans of the species in nature.
Síntese e propriedades fotocatalíticas do titanato de bismuto obtido pela rota dos complexos oxidantes de peróxido
(Universidade Federal de São Carlos, 2014-08-14)
Nogueira, André Esteves
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Camargo, Emerson Rodrigues de
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https://lattes.cnpq.br/7720754304065239
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https://lattes.cnpq.br/9755377874560173
The welfare of the population and technological progress of our society largely depend on the development and the intensive use of synthetic materials, generating a large amount of residual chemicals and high energy consumption. Therefore, the need for development of synthesis routes that are more efficient, economic and environmentally sustainable, both for obtaining new materials as well as for improvement of those traditionally used by the productive sector, has grown in importance. Therefore, the study aimed to understand and extend the use of the oxidant peroxide method (OPM), as a new synthesis route for obtaining bismuth titanate with the sillenite (Bi12TiO20) and perovskite (Bi4Ti3O12) phase. In addition, we studied the influence of defects formed in the structure by the introduction of dopants such as niobium, lanthanum, and lead. These changes were made to obtain materials with improved structural and optical properties for use in the photodegradation process of the organic dye rhodamine B (RhB) under ultraviolet and visible radiation. Through obtaining the amorphous precipitate by the OPM route we observed the formation of spheres of bismuth oxide (Bi2O3) with titanium dioxide (TiO2) nanoparticles with surface peroxo groups that were identified as mainly responsible for the high reactivity of the powders obtained by this synthesis method. The photocatalytic properties of all materials were evaluated by the discoloration of RhB solution under UV and visible irradiation, where the bismuth titanate obtained by the OPM route showed higher photocatalytic activity than the commercial TiO2. Obtaining bismuth titanate calcined at different temperatures allowed the understanding of the effects of crystallinity on the photocatalytic activity. Furthermore, it was observed that the insertion of different ions in the bismuth titanate (Bi12TiO20) structure modified the band gap energy in different ways, which consequently altered the photocatalytic activities of the materials, showing the dependence of the redox potential of the conduction and valence band in the photocatalysis process.
Reator airlift operado em sobrepressão: construção, caracterização da transferência de oxigênio e aplicação em cultivos de Escherichia coli recombinante
(Universidade Federal de São Carlos, 2014-08-15)
Campani Junior, Gilson
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Giordano, Roberto de Campos
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https://lattes.cnpq.br/1982252146006688
Owing to the broad biochemical, physiological and genetic characterization and the ease of manipulation and cultivation, several proteins with therapeutic and industrial applications are produced by genetically modified Escherichia coli. There is abundant information in the literature about strategies to increase biomass and recombinant protein production by cultivation of E. coli employing stirred and aerated tank bioreactor (conventional type). In contrast, although quite employed in cultivation of filamentous microorganisms, there are just a few studies involving cultivation of E. coli in airlift bioreactor. This reactor offers advantages over conventional one, such as simplicity of construction, reduced risk of contamination and efficient gas-liquid dispersion with low power consumption. However, the lower O2 transfer in airlift bioreactor (bench scale), compared to that achieved in conventional one, justifies the manipulation of temperature, pressure and flow rates of air and O2 in the dissolved oxygen concentration (DOC) control, avoiding decreases in biomass and recombinant protein productivities. In this context, this study aimed to: (i) determine the influence of internal pressure on the gas holdup (ɛ), volumetric O2 transfer coefficient (kLa) and volumetric O2 transfer rate (continue...).
O sexo dos meninos : Néstor Perlongher leitor de Oliverio Girondo
(Universidade Federal de São Carlos, 2014-08-17)
Campos, Mariana de Oliveira
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Alves-Bezerra, Wilson
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https://lattes.cnpq.br/1602719736498812
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https://lattes.cnpq.br/5924750107463258
This thesis presents the final results of the research developed between March, 2013 and July, 2015, reflecting upon the connection between the poets Oliverio Girondo (1891–1967) and Néstor Perlongher (1949 – 1992). In the introduction it is possible to find the three theoretical guidelines that support the research: from Borges (1951), the tradition of the reader's perspective; from Claudia Lemos (1998), the signification as a reading procedure that contemplates poetry. From Roland Barthes (1973) and Georges Bataille (1957), the relation between the pleasure of reading and erotism as a function that is detached from reproduction. Regarding these notions Perlongher is discerned as Girondo's reader. The option to approach each poet was made from the idea of circulation, Girondo's giros and Perlogher's yiros, which are associated with the Baudelarian flâneur. Such idea is unfolded in three instances, which are, indeed, indivisible: the first one regards the relation of these poets to the city. The second concerns the erotic investment from the persona who “flâneurs”. The third refers to the linguistic procedures that support this theoretical erotic dimension. Thus, one goes to the analysis and comparison of two distinct instances in which Perlongher is acknowledged as Girondo's reader, the first being Girondo's essay "El sexo de las chicas"(1984), and the second being two poems that explicitly mention Girondo: “Anales”, from the book Austria-Hungría (1980) and “El deshollinador”, from Parque Lezama (1990). To sum up, it is observed and commented on how Perlongher makes Girondo yire, i.e., how the first approaches the second and puts him into circulation.
Portal transmídia mundo do sítio: análise do projeto transmídia do Sítio do Picapau Amarelo e sua relação com as demais extensões da obra de Monteiro Lobato
(Universidade Federal de São Carlos, 2014-08-18)
Torres, Rubens Francisco
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Gamo, Alessandro Constantino
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https://lattes.cnpq.br/8208629144314123
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https://lattes.cnpq.br/9242730746663067
Important Brazilian children's literature author, Monteiro Lobato created with his books of "Sítio do Picapau Amarelo" a universe that remains and influences the imaginary of Brazilian population until today. This universe is not restricted only to literature, it expanded also in other media over almost ninety years, through TV shows, comic books, movies, and other media. In 2011 became available online the portal "Mundo do Sítio", first transmedia project product based on the work of Lobato. Besides the portal, the design transmedia of the "Sítio" also features an animation, social networking pages and a physical themed space located in Mairiporã-SP. The present research attempts to identify how the current transmedia project was developed from a universe already known and how it leverages influences from other adaptations to reintroduce the "Sítio" to a new generation. To do this, we conducted initially a historical survey of all the productions with the brand of the "Sítio", since the publication of the books by Monteiro Lobato, and then, we analyze the portal and identify its main transmedia characteristics and their relationship with the other productions made with the brand. Transmedia design of the "Sítio" uses elements developed in other adaptations of the work of Lobato and continues the expansion of the fictional universe, re-creating your space and encouraging their users to experience a playful way of that universe. With the animation, the story is expanded; presenting new information about the universe without mischaracterize the main characteristics developed by Lobato. Through social networks, users participate actively, both to assess the functioning of the Portal and how to develop productions based on the universe of the "Sítio". Finally, the portal uses features present in the text of Lobato that work effectively in the development of a TransMedia narrative.
Investigação sobre o estabelecimento de falsas memórias por meio do paradigma da equivalência de estímulos
(Universidade Federal de São Carlos, 2014-08-18)
Aggio, Natalia Maria
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Rose, Julio Cesar Coelho de
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https://lattes.cnpq.br/3386857761295187
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https://lattes.cnpq.br/4553599639534161
False memories are defined as remembering events that never happened or remember facts in a distorted way. In cognitive psychology this phenomenon has been studied through the Deese-Roediger-McDermott (DRM) paradigm, in witch lists of words semanticaly related are used. In behavior analysis, the paradigm of stimulus equivalence is a proposition to study semantic relations. This doctoral dissertation presents three studies with undergraduate students in witch DRM and the stimulus equivalence paradigms were used in association to investigate false memories. First and second studies aimed to replicate the phenomenon in a experimental situations, using both Paradigms. Difference concentrates in the controlled variables. In Study 1, nonsense words were used as stimuli. Procedure was divided into two phases. Phase 1: formation of three twelve members equivalence classes. Phase 2: verification of false memories using lists based on DRM paradigm. A list with 10 out of the 12 stimuli from each of the three classes was presented (study list). After completing a distracter task a lists composed by all stimuli from previously list (targets), the rest of the stimuli form the classes (critical distractors) and four more nonsense words (non-related distracters) were shown. Participants should indicate witch stimuli were presented on study list. Participant recognized significantly more critical distratctors, compared to non-related stimuli. However, results could be due to the novelty of non-related distractors. In the second study, this variable was controlled. In Study 2, bot phases were presented, but in Phase 1, participants were first taught three four-stimuli equivalence classes in witch one set of stimuli was familiar pictures. Later, three classes with twelve stimuli were taught. Stimuli from the first three classes were used as non-related distractors. Participant did not recognized significantly more critical distratctors, compared to non-related. It is argued that results could be due to a weak relations between stimuli from the equivalence classes. The third study aimed to increase the relations between stimuli and to investigate the effect of including emotional stimuli in equivalence classes, on false memories. Study 2 was replicated and in the twelve-member classes, a set of stimuli was pictures with happiness, angry or neutrality expressions. Only in neutral list critical ditractors were recognized significantly more than non-related distractors. Results indicates list with emotions are less likely to produce false memories.
Estudo da influência da deformação por cisalhamento extrusão em canal angular e laminação assimétrica nas propriedades mecânicas do alumínio AA 1050
(Universidade Federal de São Carlos, 2014-08-18)
Vega, Marcelo Clécio Vargas
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Kliauga, Andrea Madeira
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https://lattes.cnpq.br/3527528295399928
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https://lattes.cnpq.br/6048704190676732
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Rubert, José Benaque
It is known that the formability of aluminum alloy AA1050 is not favored when sheets are produced by conventional rolling due to the appearance of intense cube texture {100} <100> after recrystallization heat treatment. The objective of this study was to investigate whether components of shear processes can improve this property. For this work two processes of plastic deformation introducing shear stresses were selected: Equal channel angular extrusion (ECAE) and asymmetric rolling; these processes were compared to conventional rolling. In conventional rolling deformation results mainly compressive stresses. In the ECAE process shear is induced in the intersection of two channels of the same geometry that intersect by an angle  In the asymmetric rolling the shear stress is basically increased due to the speed variation between the rolls. An AA1050 aluminum sheet produced by the twin roll casting process was used in this study. The deformations were performed basically in 4 paths: i) conventional rolling, 70% reduction, ii) ECAE 1-8 passes, iii) ECAE 1-4 passes followed by conventional rolling with reduction of 70% and iv) Asymetric Rolling with reductions 30-50%. The mechanical and microstructural characterization of the deformed state was performed and the formability after annealing heat treatment was studied. ECAE deformation reduced the grain size, which measured by EBSD and transmission electron microscopy yield 1 micrometer. The evolution of equivalent strain compared with the increase of the hardness indicated a grain size stabilization of the grain/cell after four ECAE extrusion passes. After 8 passes the fraction of high angle boundaries exceeded the low-angle boundaries, ie dynamic recrystallization occurred during deformation. The texture after one pass ECAE approached the ideal texture for a 120 ° ECAE die. For deformations with 4 - 8 ECAE passes, the texture evolved into scattering the orientations having the {111} plane parallel to the surface ( fiber), and into the formation of rotated cube {100} <110> and rotated Goss {110} <110> orientations. The conventional rolling after ECAE returned the orientations to typical rolling textures: brass, copper and Goss. Deformation by asymmetric rolling with a difference of tangential velocity of 1.2 imposed shear stress, but it was necessary to decrease the reduction rate from 10% to 5% per pass in order to appreciably modify the texture. Comparing the formability of the deformed material, it was observed that ECAE increased the penetration depth in the Erichsen test, while rolling decreased the Erichsen index. Asymmetric rolling reduced the intensity of texture and destroyed the symmetry of the crystallographic orientations. The asymmetric rolled sample presented better formability than the rolled samples. After annealing, the samples of conventional rolling, with or without ECAE pre - strain, showed typical textures of annealed laminated material with high cube texture type. The  fiber was not stable in the ECAE annealed samples. Although the overall texture intensity remained low, increasing ECAE deformation before heat treatment strengthened the Goss {110} <001> orientation. For the asymmetric rolling the fiber orientations <100>// ND was scattered and both rotated cube and cube orientations were present. The lowest index of planar anisotropy was obtained in the sample annealed after four ECAE passes, representing a lower tendency to fail, This sample also presented an index of penetration in Erichsen testing of the same order of conventionally rolled sheets. It has been shown that both ECA as the asymmetric rolling deformation can significantly modify the texture of deformation and annealing, and improve the characteristics of formability of aluminum alloy 1050. This processing step should be located at the end of mechanical forming process before final annealing.
Identificação e extração semiautomática de contextos definitórios em corpus com vistas à redação da definição terminológica: proposta de sistematização linguística para a língua portuguesa
(Universidade Federal de São Carlos, 2014-08-18)
Kamikawachi, Dayse Simon Landim
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Almeida, Gladis Maria de Barcellos
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https://lattes.cnpq.br/4046789388750478
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https://lattes.cnpq.br/7846039422136199
Computational tools in Natural Language Processing (NLP) are essential in handling electronic texts. Some of the resources commonly used are: frequency counters, word lists, keywords, and concordancers. It is noteworthy that this last tool, which terminologists use to view and extract defining contexts for certain terms, is useful in the stage of writing terminological definitions. Depending on the term and corpus size, the list of concordances may exceed a few hundred lines, making the task of defining the term extremely time-consuming. Yet, while concordancers facilitate the task of writing definitions, studies in terminology (ALARCÓN, 2009) and NLP (KLAVANS; MURESAN, 2001) have shown that it is possible to develop linguistic formalism that can be a substrate for the generation or enrichment of a system capable of detecting such contexts. While research in this direction has already been undertaken for English, Spanish, German, and French, among other languagesǡ research on Portuguese needs a more accurate linguistic explanation of defining context, in order to serve as a base for the development of similar systems for the Portuguese language. Therefore, the goals of this research are as follows: 1) to investigate the patterns of defining contexts found in technical corpora in Portuguese, 2) to provide linguistic knowledge which can be formalised computationally to create a system of semi-automatic extraction of candidate defining contexts, and 3) to evaluate the results generated. As the study’s corpus, we used scientific articles from the Bank of Portuguese (LAEL-PUC), and for the analysis, the following verbs were chosen: nomear ‘to name’, conceber ‘to conceive’, chamar ‘to call’, entender ‘to understand’, conhecer ‘to know’ and denominar ‘to denominate’. It was possible to do: 1) a quantitative and qualitative description of each verbal definitory pattern, 2) a local grammar for the chosen verbs with the purpose of aiding in the semiautomatic retrieval of definitory contexts, 3) an exclusion grammar to serve as a stoplist for local grammars and 4) a set of heuristics for a semiautomatic definitory context classifier. The evaluation of the lexical-syntactic rules of these six verbs showed 64% accuracy and 92% coverage in the global average, which represents an optimistic result in comparison to the results of previous studies. As a result, it was possible to 1) validate the methodology used, making it possible to extend it to other lexical-syntactic patterns and 2) obtain linguistic knowledge in order to integrate a semiautomatic computational system for definitory context candidates extraction for the Portuguese language.
Modificação química de poli(ácido láctico) com anidrido maleico por processamento reativo
(Universidade Federal de São Carlos, 2014-08-18)
Rigolin, Talita Rocha
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Bettini, Sílvia Helena Prado
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https://lattes.cnpq.br/3687551763124327
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https://lattes.cnpq.br/9580513904975670
The chemical modification of PLA with maleic anhydride by reactive processing and the extent of reaction and degradation reactions, were studied. Routes of grafting reaction of maleic anhydride in PLA were evaluated. Dicumyl peroxide (DCP), as initiator, and maleic anhydride (MA) for modification of the PLA, were used. Acidity levels of the compositions were obtained by titration technique of the acid groups and observed an increase in acidity of the modified PLA s, with steep increase in the sample of PLA-g-MA, produced in the presence of DCP. During the PLA modification, with MA, was observed a reduction of 45% in Mn, measured by SEC. In order to analyse the reaction routes, PLA/PBAT blends were produced. Compatibilization of the blend was performed by two ways, one using in situ PLA/PBAT modification and the other using a pre-modified PLA (PLA-g-MA). A blend without MA (PLA/PBAT) was used as reference. In according with the observed mechanical behavior, a synergic effect is observed for PLA-g-MA/PBAT blend, despite low molecular weight of PLA matrix.
O impulso utópico em The Wanting Seed
(Universidade Federal de São Carlos, 2014-08-18)
Silva, Débora Heloisa da
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Ferreira, Carla Alexandra
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https://lattes.cnpq.br/5522506928191940
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https://lattes.cnpq.br/6909920465608693
This dissertation seeks to analyze the dystopic novel The Wanting Seed (1962), by the English writer Anthony Burgess with the objective of identifying in which way both structure and the development of the work points to, at an aesthetic level, the global feeling of utopia, which Fredric Jameson (2007) calls utopic desire or utopic impulse, which is present in daily life, in politics, in social movements and revolutions. Through the political reading, this research tries to show that, far beyond a novel about a degenerated future by overpopulation, this book presents, in its formal contradictions, much from the social, political and economic global movement of which it is part.
A relação gestão escolar e trabalho docente: estudo de caso numa escola municipal de Votorantim/SP.
(Universidade Federal de São Carlos, 2014-08-19)
Araújo, Tiago Antônio de
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Nascimento, Fabrício do
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https://lattes.cnpq.br/3496410597486943
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https://lattes.cnpq.br/5810317013662335
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Nogueira, Eliete Jussara
In this work we present a qualitative study conducted in a municipal elementary school located in the city of Votorantim (SP). Informants participated in the survey as the team manager (director and education coordinator) and four teachers who teach in the early grades of elementary school. The main objectives of the research were: to determine whether the educational activities of the management team interfere in teaching developed in the studied school, see how the management team has been trying to implement improvements in the educational processes, and also the principles of a democratic management are used by the management team on ways to manage and organize the school. As an instrument of data collection, semistructured interviews, participant observation of the context of the subject and document analysis of school records were made. The data obtained in the investigative process were organized into categories for analysis, according to the research questions previously developed. As a result, it is concluded that the school management team seeks to engage democratically with the community, teachers, staff and students, so that its action seeks to collaborate with the teaching work, given the participatory work with teachers, in which subjects and anxieties brought on the context of the classroom are discussed and referrals are collectively determined.
Estudo de fibras de folhas de abacaxis (gênero Ananas) e sua utilização em compósitos biodegradáveis com matriz de poli(ácido lático) (PLA)
(Universidade Federal de São Carlos, 2014-08-19)
Sena Neto, Alfredo Rodrigues de
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Mattoso, Luiz Henrique Capparelli
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https://lattes.cnpq.br/5839043594908917
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https://lattes.cnpq.br/5212303626376503
In this work natural fibers from new pineapple varieties were studied aiming at their application as mechanical reinforcement for green polymer composites. Eighteen varieties of pineapple leave fibers (PALFs) were then characterized in terms of their morphology, structural arrangement (cellulose crystallinity index (Ic) and microfibril angle), chemical composition (extractives, lignin, holocellulose, cellulose and hemicellulose contents), mechanical properties (tensile strength, elastic modulus and fracture strain) and thermal stability. The studied PALFs had low microfibril angles and high Ic. Their elastic modulus, tensile strength and degradation temperature onset ranged between 15GPa-86GPa, 212MPa-1309MPa, 240°C 272ºC, respectively. All these parameters enabled to nominate the eighteen PALFs as suitable reinforcements for polymers. Close relationships between cellulose, holocellulose and Ic values, and thermal and mechanical properties of PALFs were found out, what provided guidelines for direct selection and/or to support a genetic improvement program of the Ananas genus. An example of such a methodology was presented in this work. The fiber from the pineapple variety called "Potyra" was selected to produce biodegradable composites with poly(lactic acid) (PLA) through injection molding. The Potyra fibers were before hand treated with alkaline solution in order to improve their interfacial compatibility with PLA. The treated Potyra fibers-reinforced composite exhibited an increased elastic modulus from 1,9 GPa to 3,5GPa, tensile strength from 58,8 to 69,6MPa, and notched impact strength from 2,57kJ/m2 to 4,26kJ/m2 in comparison to the pure PLA matrix. The HDT of the PLA was also incremented by 10% due to the fiber incorporation. These findings confirmed the promising potential of Potyra fibers as reinforcements in green composite technologies.
Atividades e problemas de geometria espacial para o ensino médio
(Universidade Federal de São Carlos, 2014-08-19)
Grillo, Jean Daniel
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Paterlini, Roberto Ribeiro
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https://lattes.cnpq.br/6240750958932738
This dissertation presents as the main product a didactic proposal for spatial geometry classes in high school. The motivation for creating this proposal began with the observation of the author that the approach of spatial geometry only with the lecture method is not sufficient to provide an effective construction of abstract geometric objects. The proposal starts with planning of experiments in geometric solids, particularly the cube, with the aim of promoting the construction of abstract geometrical objects of three dimensions. In following problems using these lesson plans for solving some challenges that combine the visualization unfolds with the space object, as well as provide the contextualization of spatial geometry are proposed. The proposal is focused on the idea of proposing non-traditional activities, in which students work in groups to develop proposals with the least possible interference from the teacher. The proposal also adopts suggestions from official documents such as the National Curricular Parameters (PCN) and Curricular Proposal of the State of São Paulo, as well as authors and researchers, indicate that the use of experimentation and problem solving. For this didactic proposal was implemented by constructing "Activity Sheets" containing the activities to be performed by students with enough information for them to understand and can answer questions. These sheets were applied to three classes of high school and the results analyzed to enable the validation of educational product with eventual correction. We believe that students performed well the tasks and the work was important for their learning. There were some difficulties on their part and we interpret that this happened because they never had prior contact with this form of study. We understand that our educational product is validated with this application and we can make them available to fellow teachers, who can directly apply in similar circumstances to our pedagogical or adaptations in other environments.