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Diálogos entre moda e cultura : um olhar bakhtiniano para as narrativas do estilista Ronaldo Fraga
(Universidade Federal de São Carlos, 2017-03-14) Dias, Nicole Cristine de Aquino; Miotello, Valdemir; https://lattes.cnpq.br/9131819326282708; https://lattes.cnpq.br/9289507701075286
This research project seeks to provide a dialogic analysis of Ronaldo Fraga’s utterances, with special attention to the ones produced during two of his collections, O Turista Aprendiz, summer 2010/2011, and Turista Aprendiz na Terra do Grão Pará, summer 2012/2013. By doing this, the objective is to demonstrate how his words are permeated and constituted by other people’s words, for example the ones by Mario de Andrade.Consequently, Ronaldo Fraga’s utterances are biased and reflect the writer’s discourse, as the modernist and his ethnographic journey, presented in the book O Turista Aprendiz, are constant inspirations to the project of the designer, who has the Brazilian culture as the main point of his fashion production. By having the Bakhtinian theoretical and methodological premises as the framework of the project, we want to perceive how this otherness constitutes the designer’s ethical-aesthetic act and how his responsible act provides the change of considering fashion as also inserted in the cultural discussions, beyond the folkloric outfits. In order to achieve our objectives, we will compare texts, taking into account two specific fashion shows by Ronaldo Fraga in comparison to Mario de Andrade’s book O Turista Aprendiz. We will use in our analyses the concepts of dialogism, ideology, otherness and carnivalization. From this interaction, we will look for the meaning of culture.We also use as a basis the book Caderno de roupas, memórias e croquis, published by the designer. In this book, he gathered some elements of his creative process from some of his collections and parts of interviews and lectures. We intend to offer to this research area a dialogic reflection on the relationships between fashion and culture, amplifying the comprehension and the engagement of the linguistic studies from this perspective.
Síntese de membranas de alumina anódica porosa sobre substratos metálicos obtidos por evaporação térmica
(Universidade Federal de São Carlos, 2017-03-14) Garcia, Uanderson Mezavila; Trivinho-Strixino, Francisco; https://lattes.cnpq.br/9740223649776400; https://lattes.cnpq.br/6240710477686567
This work covers the investigation and synthesis of nanometric structures of Porous Anodic Alumina PAA, produced from low purity substrates, in aim to obtain selfsustained membranes. The Hard Anodization (HA) and Mild Anodization (MA) processes were used under special conditions through those found in literature. The analyses of results were based in comparing the AAP produced under the same conditions except the applied potential that was different depending on the MA or HA. HA process had its time halved in order to investigate the oxide growth rate and to calibrate the conditions of anodized membrane synthesis over the glass samples. This work also covers the construction of a resistive thermal evaporation PVD system capable of evaporating metals with melting points below 800°C. Through the deposition of successive layers it was possible to obtain metallic films of aluminum with thicknesses above 10 µm, enabling conditions of synthesis of porous anodic alumina on substrates produced by thermal resistive evaporation. The result of membrane synthesis on low purity aluminum substrates was complement to the synthesis of membranes obtained in aluminum evaporated in glass substrates, since the thickness of each deposited film is low if compared to the thickness of the AAP layer. Therefore, it was necessary to make several Al depositions on the same samples, to obtain an aluminum film that was able to support an oxide layer of anodic alumina and with the same characteristics of those obtained by the process of MA. All anodized samples were characterized by scanning electron microscopy, including samples made from metalized aluminum. The micrography obtained from the low purity aluminum membranes were treated by ImageJ software allowing the morphological analysis. AAP membranes obtained from technical Al substrate depicted the formation of branched pore channels, a result of instabilities in applied electric field during Anodization and presence of different alloying elements in the Al substrate. The metalized aluminum film had a larger thickness in the samples positioned in the middle of the sample holder possibly due to different temperature gradients of filament depending on the position of Al pellets.
Catalisadores com estrutura do tipo perovskitas PrCo1-xNixO3 para produção de gás de síntese
(Universidade Federal de São Carlos, 2017-03-14) Dias, Eduarda Cristina Caixeta; Assaf, José Mansur; https://lattes.cnpq.br/9563312407691130; https://lattes.cnpq.br/3291804329900857
Energy is an essential component for a country's development. Since Brazilians’ main energy source is the oil and it has limited reserves, an alternative is needed for a synthesis of fuels throughout other raw materials, such as natural gas, which is abundant in nature and rich in methane. Methane gas is the main precursor for synthesis gas formation, a mixture of CO and H2 that can generates various synthetic compounds such as gasoline, methanol, hydrocarbons and others. This gas mixed with carbon dioxide, which are the two main greenhouse gases, reacts in the presence of a catalyst forming the synthesis gas through the dry reforming. In this context, several studies are being carried out to find a high catalyst conversion, high selectivity for CO and H2, low cost, and mainly resistance to the carbon deposition; which is the main cause of deactivation in this type of catalyst. A family of elements that may contain containing responses to such problems is perovskite oxides showing as a general formula ABO3, which in latter A are the rare earths, alkaline earths or alkaline; and B are the transition metals. In this project they were synthesized with the type of perovskite PrCoO3 with the insertion of the nickel in the structure forming oxides of formula PrCo1-xNixO3. The samples of catalysts were characterized by X-ray diffraction, specific surface area (BET), temperature programed reduction (TPR), X-ray fluorescence (FRX), thermogravimetric analysis (ATG) and thermo differential analysis (DTA). Its catalytic activity was tested in the range of 500 to 800 °C, verifying the results of progressive conversion as the nickel content in the structure increases. The results showed conversions up to 72%, yielding 84,7% for CO and 38, 8% for hydrogen, therefore a ratio of H2 / CO ≈ 1:2. Stability analyzes indicated that the catalysts remained stable, without loss of activity in the time of 8 h. Also it was observed that cobalt assists in the inhibition of carbon formation, minimizing the deactivation.
Modificação da molhabilidade da celulose por processos subsequentes de ablação e deposição a plasma
(Universidade Federal de São Carlos, 2017-03-14) Camargo, Janine Sanches Gonzaga de; Menezes, Aparecido Junior de; https://lattes.cnpq.br/0484426340349483; Silva, Adriana de Oliveira Delgado; https://lattes.cnpq.br/2707979913713089; https://lattes.cnpq.br/2159568288111874
Cellulose is a biopolymer available in abundance in nature, which presents very interesting properties mainly for the textile, packaging and paper industry. However, due to its strongly hydrophilic character, resulting from the presence of a large number of free hydroxyl groups in its molecule, its use in certain areas becomes limited. In order to promote the modification of the wetting characteristic of the cellulose, and make it superhydrophobic, samples of this material were submitted to plasma processes performed in two steps: ablation and film deposition. Initially, the effect of variation of ablation time on the creation of adequate surface topography was studied. For this, the samples were exposed to the oxygen plasma at a pressure of 13 Pa and power of 150 W, varying the treatment time from 5 to 60 minutes. Then, the treated samples were submitted to the process called PECVD (Plasma Enhanced Chemical Vapor Deposition), in which a film was deposited on the surface from the precursor hexamethyldisiloxane (HMDSO) in the presence of argon, in a ratio of 70 e 30%, respectively. The deposition time was set to 30 minutes and the power applied was 150 W. In a second investigation, the effect of the thickness of the deposited film was studied. In this case, the cellulose samples were previously exposed to the oxygen ablation plasma for 60 minutes and then led to the PECVD process, with the deposition time varying from 5 to 30 minutes. In a third investigation, the duration of the ablation and deposition steps was reduced to 30 and 1 minute, respectively, in order to optimize the methodology. The samples were characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR), profilometry, static contact angle measurements and hysteresis and sliding angle measurements. The results demonstrated that longer exposure times for the ablation step provide a significant modification in the material, through the creation of nanoscale structures on the surface of the fibers. The deposition step promoted the formation of films with organosilicon character on the cellulose surface, with thicknesses varying between 144 and 910 nm. The combination of the topography created after 30 minutes of ablation with the thin film resulting from the deposition step for 1 minute provided a surface with low receptivity for both polar (? = 150°) and nonpolar (? ~ 120°) liquids, whose wettability property remained stable with treatment aging time. The low values obtained for hysteresis (9°) and sliding angle (7°) confirm the creation of a superhydrophobic roll-off surface.