Repository logo
Communities & Collections
Entire repository
About
English
العربية
বাংলা
Català
Čeština
Deutsch
Ελληνικά
Español
فارسی
Suomi
Français
Gàidhlig
ગુજરાતી
हिंदी
Magyar
Italiano
Қазақ
Latviešu
മലയാളം
मराठी
Nederlands
ଓଡିଆ
Polski
Português
Português do Brasil
Русский
Srpski (lat)
Српски
Svenska
తెలుగు
தமிழ்
Türkçe
Yкраї́нська
Tiếng Việt
繁体中文
Have you forgotten your password?
  1. Home
  2. Browse by Date

Browsing by Issue Date, starting with "2012-03-06"

Filter results by year or month
Now showing 1 - 20 of 18954
  • Results Per Page
  • Sort Options
  • Loading...
    Thumbnail Image
    Item type:Item,
    Tornar-se aluno(a) indígena: a etnografia da escola Guarani Mbya na aldeia Nova Jacundá
    (Universidade Federal de São Carlos, 2012-03-06)
    Marqui, Amanda Rodrigues
    ;
    Cohn, Clarice
    ;
    https://lattes.cnpq.br/1714080901123094
    ;
    https://lattes.cnpq.br/1696584969032916
    This dissertation investigates the teaching and learning process and the pedagogical practices of Guarani Mbya child from Nova Jacundá, in the southeast of Pará. Its intent is to comprehend what is to becoming/become (Toren 2004) an indigenous student. The child will be taken as a social actor who is active and a culture producer (Cohn 2005), and we took the school as the place where child become students, like the practice of autopoietic (Toren 1999), therefore, a place which produces meaning to their world. So, my ethnography intents to comprehend how these child produce meaning in the school context and, as indigenous students, how they take the school as a frontier place (Tassinari 2001) where the knowledge is articulated, and the Guarani Mbya way of being and their teaching practices with the knowledge and the pedagogical methods. This ethnography of a Guarani Mbya school will contribute to the comprehension of meaning assigned by child going to school, place where are created new forms of knowledge construction indigenous and non-indigenous in new relations, beyond of those made in their own Guarani learning process.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Nanofios de Ge : síntese e dispositivos
    (Universidade Federal de São Carlos, 2012-03-06)
    Kamimura, Hanay
    ;
    Chiquito, Adenilson José
    ;
    https://lattes.cnpq.br/7087360072774314
    ;
    https://lattes.cnpq.br/2414357209169841
    Abstract In this work, germanium nanowires' based devices were studied and developed and the influence of natural disorder on the electronic properties of these structures was also investigated. Parameters related to the current transport mechanisms, such as electron mobility, localization length and Schottky barrier height were determined. Such investigations were carried out initially by the fabrication of germanium nanowires using the vapour-liquid-solid method with gold nanoparticles acting as catalysts for the growth process. Morphological and structural characterizations were performed to obtain information about the material: the X-ray di_raction analysis showed a good agreement with the cubic structure of germanium and its diamond-like structure; by scanning and transmission electron microscopy it was found samples with diameter from 20 to 150 nm and length up to tens of micrometers. Furthermore, these techniques allowed the observation of an oxide layer on the surface of the nanowires, whose disordered interface originates localized states, which can also be responsible for changes in electronic properties of the system. Di_erent types of devices were developed for the investigation of the electronic transport in germanium nanowires. The experiment performed on each device allowed the analysis of the disorder's influence on the measured properties: electronic transport within the temperature ranges used for the experiments was dominated by the variable range hopping mechanism, characteristic of disordered systems instead of the expected thermal excitation, typical of semiconductor materials. Further confirmation of these data was obtained using transistor devices and the carrier mobility was found to be lower than the commonly observed values for germanium. These data also agree with the fact of disordered systems exhibits low mobility values due to the presence of localized states. Finally, it was used a device specially designed for the study of the metal/nanowires interface characteristics. In order to determine the Schottky barrier height a two barriers model was used (including temperature dependence). The obtained values (from 0.48 to 0.54 eV ) were di_erent from the usual (0.58 eV for germanium/aluminium contact), which also shows and con_rms the presence of localized states at the metal/nanowire interface, following Bardeen's model for the Schottky barrier formation. To complement this analysis theoretical simulation values for Schottky barrier (∼ 0.5 eV ) were calculated taking into account the contribution of surface states. This value corresponding to density of states of 1012 ∼ 1013cm−2eV −1. Comparing both theoretical and experimental Schottky barrier heights, the presence of localized states generated by disorder was confirmed.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Clonagem gênica e caracterização de uma enzima tipo-luciferase de coleópteros não bioluminescentes e sua relação com a origem da atividade luminescente
    (Universidade Federal de São Carlos, 2012-03-06)
    Prado, Rogilene Aparecida
    ;
    Viviani, Vadim Ravara
    ;
    https://lattes.cnpq.br/3942043373510668
    ;
    https://lattes.cnpq.br/3202205839573412
    Bioluminescence in beetles is dependent on luciferase which evolved from AMP/CoA ligases. The cDNA of a luciferase-like enzime was cloned from the Malpighian tubules of Zophobas morio mealworm (Coleoptera: Tenebrionidae). The gene product of this cDNA displays weak luminescence and it is composed of 528 aminoacids residues with N-terminal and C-terminal sequences signal addressed to smooth endoplasmic reticulum membrane. Although having a low identity (26-32%) with beetle luciferases, this enzyme is a reasonable protoluciferase model to investigate the origin and evolution of beetle luciferases. The luciferin binding site is higly conserved among the beetle luciferases. However, in this protoluciferase of Z. morio, most of these residues of this motif are substituted by others. Using a site-directed mutagenesis survey some of aminoacids residues of this protoluciferase, which are located at correspondent luciferin binding site of luciferases, were replaced by the conserved residues of beetle luciferases. Most of the substitutions had negative effect on the luminescent activity, however, the substitution I327T, which is located in a β-hairpin motif close to the luciferin binding site, improved the luminescence activity. Such substitution indicates the importance of this motif for luciferase activity and indicates a possible route for the evolution of bioluminescence function of beetle luciferase. Since this enzyme is located in the Malpighian tubules, which are involved in excretion and metabolization of carboxylic substrates, this enzyme could be involved to excretion the some type of chemical compound. Regardless of the function the results show that the potential for bioluminescent activity is older and probably arose before the divergences of the Coleoptera bioluminescent families.
  • Loading...
    Thumbnail Image
    Item type:Item,
    A violência contra a mulher e o atendimento prestado às vítimas: a perspectiva do policial civil
    (Universidade Federal de São Carlos, 2012-03-06)
    Migliato-Nunes, Patrícia Tonissi
    ;
    Brino, Rachel de Faria
    ;
    https://lattes.cnpq.br/0235133592567485
    ;
    https://lattes.cnpq.br/7578694439215415
    The Women's Police Stations were created to combat and prevent violence against women, enabling act in time to prevent the occurrence or worsening damage to individuals development. However, some observational studies, as well as research conducted with violence women victims, show that the police attendance is unsatisfactory, pronounced by patriarchal customs, which contributes to women do not give continuity to the complaint of a crime committed against them, keeping the violence perpetuation. Therefore, it is socially and scientifically relevant to study surrounds` reality of the civil police and the challenges faced by it. This study aimed to elicit and characterize police officers´ beliefs on violence against women and their conceptions of such violence and the attendance to violence victims. The study included 20 police officers from a medium-sized city in the interior of Brazil. The following instruments were used for data collection: a) Questionnaire on beliefs about domestic violence and b) Questionnaire on the conceptions of police officer about violence against women and the attendance to violence victims. The instruments were applied at two different times. Through instruments were made qualitative and quantitative analysis. The quantitative analysis was obtained with descriptive methods. Qualitative analysis was obtained through defined categories. The outcomes showed that the majority of responses police to the statements of the first questionnaire pointed to a low percentage of inappropriate responses, however, the police officers who participated in the survey had specific beliefs about violence against women with high rates of inadequacy, including blaming the victim for staying in abusive relationship, misconceptions about the effects of violence on child development, blaming the victim for the violence. Although, participants had adequate view with respect to some beliefs, such as: conceptions about women deserve to be beaten and physical abuse to be more threatening than psychological abuse. The beliefs in which police officers had higher rate of inadequate responses can directly affect the attendance to violence women victims. The outcomes also showed domestic violence is most often seen by participants as physical aggression, although the participants demonstrated a good knowledge about the different practices of violence. Additionally, the policemen pointed out some challenges for them to meet the victims of violence, such as lack of training, staff shortages and weakened emotional state of employees who can produce an insufficient treatment. The concluding remarkes points to the need for better training for professionals regarding the issues of violence against women, as well as the development, implementation and evaluation of training courses for such professionals, aiming to fill this gap in their formation.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Caracterização das camadas formadas pela nitretação a plasma de ferro sinterizado
    (Universidade Federal de São Carlos, 2012-03-06)
    Fontes, Marcos Alves
    ;
    Nascente, Pedro Augusto de Paula
    ;
    https://lattes.cnpq.br/1387043320265189
    Ion nitriding is a process of thermo-physical-chemical treatment that provides a surface hardening, originated by interstitial diffusion of nitrogen on the ferrous and nonferrous alloys surfaces. Understanding and controlling the formation of the nitrided layer have considerable industrial interest due to the improvements regarding wear, corrosion and fatigue resistances on the metals and their alloys. In this work, it was performed the surface modification in sintered iron samples by ion nitriding process, with a gaseous mixture of 80% vol H2 and 20% vol N2, during times of 3 and 5 hours, using ion nitriding temperature of 500°C, 540°C and 580°C. The samples were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses, and wear and micro-hardness tests, comparing the results with sintered and steam treatment samples. The results showed that both nitride thickness and wear resistance increased with higher nitriding time and temperature, where the temperature was the variable that most influenced the aforementioned characteristics. The XRD analysis indicated that the nitrided layer near to the surface, for all samples, consisted in a mixture of y-Fe4N and e-Fe3N phases.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Estudo sobre a ictiofauna do Rio Cabeça, um tributário do Rio Corumbataí com nascentes nas cuestas basalticas do estado de São Paulo
    (Universidade Federal de São Carlos, 2012-03-08)
    Cardoso, Rodrigo Torres
    ;
    Garavello, Júlio César
    ;
    https://lattes.cnpq.br/2778105126670170
    ;
    https://lattes.cnpq.br/8249557280995807
    This study investigates the composition and distribution of fish species from Rio Cabeça, a tributary of Rio Corumbataí basin. Fish samples and physical data were monthly collected at four regular sampling sites and during 12 months, thorough the channel of Rio Cabeça and on five additional collection sites. From the physical data, width, depth and water velocity (in m/s) of the river were obtained. The fish collections were made with help of: gill net, trawl net, other hand net and sieve. Species richness and abundance were designed thorough the constancy of occurrence of the species; the Jaccard similarity analysis of rarefaction; the species accumulation curve and a descriptive analysis of the collecting sites. The sampling sites showed physical characteristics as: Site 1, narrow but deep and with rapid waters. Site 2, wider and shallower and with more water spread. Site 3, mostly broad and deeper. Site 4, also broad and shallow, but containing rapids and fast waters. The samples include 4.532 fish specimens belonging to six orders, 17 families and 65 species. Site 4, showed the best richness and abundance, and the other three sites revealed to be more or less similar. In terms of constancy the site 4 had the highest percentage of occasional species, while the other three sites had the highest percentage of regular species. The analysis of rarefaction had shown a greater richness of species at site 4 and lower species richness at remaining sites. The species accumulation curve shown that a considerable proportion of fish species is present in this river as represented in this study. The Jaccard similarity analysis shown significant differences in the species composition through the four collecting sites. The results and the discussion suggest that the basaltic Corumbataí mountain formation may interfere with the distribution, composition and richness of the ichthyofauna. On the other hand, the Rio Cabeça with 65 fish species is an important tributary of the Rio Corumbataí. Finnaly this study outcome the necessity of more attention to ichthyofauna conservation at waterfall environments, where the specimens are exposed to illegal fisheries.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Cultivo heterotrófico de Aphanothece microscopica Nägeli e Chlorella vulgaris em diferentes fontes de carbono e em vinhaça
    (Universidade Federal de São Carlos, 2012-03-08)
    Bonini, Monica de Albuquerque
    ;
    Bastos, Reinaldo Gaspar
    ;
    https://lattes.cnpq.br/9329363278429665
    ;
    https://lattes.cnpq.br/5490287339979298
    ABSTRACT Microalgae include both algae Chlorophycea and cyanobacteria. These organisms have attracted interest due to its versatile metabolism, since some strains have, additionaly to photosynthetic metabolism, hability to grow in the dark by the consumption of simple organic molecules, such as glucose, acetate and glycerol. This hability suggests the application of these microorganisms in several areas, such as biological treatment of agroindustrial wastewater, aiming the removal of nutrients and organic matter. São Paulo/Brazil is one of the main producers of ethanol from sugarcane, generating a considerable amount of vinasse. Vinasse represents the main wastewater from de sugarcane agroindustry, being usually applied as fertigation in sugarcane crops. In this context, this study aimed to evaluate the heterotrophic growth of cyanobacterium Aphanothece microscopica Nägeli and the chlorophyceae Chorella vulgaris in synthetic culture media supplemented with organic carbon source and in vinasse, aiming to produce biomass and application it in wastewater treatment. Mixotrophic cultures were conducted to select the optimal concentration of organic substrate for the growth of microalgae, which were evaluated in heterotrophic cultures. Additionally, experiments have been conducted with pre-treated vinasse, evaluating the COD removal and the glucose and potassium incorporation. By the mixotrophic tests was selected the optimal concentrations of 25 and 12.5 g.L-1 glucose, 0.5 and 1.25 g.L-1 potassium acetate and 0.46 and 0.92 g.L-1 glycerol as ideal for the cultivation of Aphanothece microscopica Nägeli and Chlorella vulgaris, respectively, which reflected on the maximum specific growth rate between 0.0072 and 0.043 h-1. In the heterotrophic cultures the maximum specific growth rate was greater or equal to both microalgae in all carbon sources, with reduction between 30.4 and 90% of the initial concentrations of substrates. The experiments demonstrated possibility to use vinasse as culture media for both microalgae, especially Aphanothece microscopica Nägeli. In this conditions, results indicated the maximum removals of glucose (55.5%), COD (60.8%) and potassium (13%) by the cianobacterium, and 83.7% of glucose, 25% of COD and 13.8% of potassium by Chlorella vulgaris. The results suggest the heterotrophic metabolism for both microorganisms, pointing an interesting alternative to use of wastewater as culture media to produce high-value biomass from a low-cost way.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Análise da escoabilidade de pós
    (Universidade Federal de São Carlos, 2012-03-08)
    Campos, Milene Minniti de
    ;
    Ferreira, Maria do Carmo
    ;
    https://lattes.cnpq.br/7070885875161111
    ;
    https://lattes.cnpq.br/8281708881484887
    There are many industries which use powders somewhere in their production process, such as: food, pharmaceuticals, ceramics, cement and fertilizer industries. The knowledge of properties associated with the flowability of these materials is important, since the characteristics of the powders can go through amendments in processing. Thus, the evaluation of indexes of flowability and the identification of main factors which influence the powders flowability play an important role in the operation and design of industrial devices. The objective of this study was to evaluate the flowability properties of organic and inorganic powders, as well as analyze which factors interfered in these properties. The organic materials were represented by whole and skim milk powders, while alumina and ceramic powder were selected for the assessment of inorganic materials. The physical characterizations carried out were: display materials morphology at SEM (Scanning Electron Microscopy), size distribution, particle density, initial moisture content, aerated bulk density and tapped bulk density. The measured materials flowability properties were: angle of internal friction, effective angle of internal friction, angle of wall (galvanized steel) friction and flow index, all of them determined by Jenike's direct shear cell, Hausner ratio obtained from the values of tapped and aerated bulk densities; angle of repose, determined through the dropping of powder in an acrylic surface. In general, the results obtained, considering all methodologies employed for the determination of materials flowability, demonstrated that alumina, ceramic powder and whole milk powder, if compared to skim milk powder, presented lower indexes of flowability. If these materials were stored in silos made of galvanized steel, alumina and ceramic powder flowability would be more difficult than that of skim and whole milk powders. Thus, the results showed that the material physical properties interfere in powders flowability. The skim milk powder flowed more easily than whole milk powder, because higher fat content and smaller average particle size of whole milk powder decreased the flowability of this material in comparison to the skim milk powder. Likewise, despite they have similar composition, alumina presented lower flowability that ceramic powder, because this powder had larger average particle size and the powder presented fewer agglomerated particles.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Desenvolvimento de blendas poliméricas policarbonato/ poli (Tereftalato de Butileno) (PC/PBT) compatibilizadas e nanoestruturadas
    (Universidade Federal de São Carlos, 2012-03-08)
    Laurindo, Vanessa
    ;
    Hage Júnior, Elias
    ;
    https://lattes.cnpq.br/1240692926327687
    ;
    https://lattes.cnpq.br/8930068830121454
    The evaluation of addition of a random copolymer as compatibilizing and his effect in obtaining nanostructured morphology in blends composed by PC as matrix and PBT as dispersed phase, were investigated. The copolymercompatibilizer was produced by reactive mixture, in a torque rheometer, of the components of blend PC/PBT (50/50%wt) in the presence of different concentrations of the catalyst TnBT (1000 and 2000 ppm) and different mixing times (10 and 30 minutes). The characterization of thermal and chemicals properties by DSC, FTIR and 1HNMR showed evidences of the occurrence of transesterification reactions between the blends components for all systems studied. However, formation of the random copolymer was confirmed only for the system with addition of 2000 ppm of the catalyst, subjected to different mixing times. To minimize the effects of degradation reactions in the random copolymer formed, was selected use as compatibilizer to obtain nanostructured blends, the copolymer obtained after 10 minutes of mixing. To evaluating effect of the copolymer-compatibilizer in obtain a nanostructured morphology, were prepared blends PC/PBT (95/5%wt) with addition of 0, 1, 3 and 5% wt of copolymer and by the thermal analysis by DSC and DMTA was observed the existence of a partial miscibility, restricted to the amorphous phase, between the components of the blends PC/PBT studied. Morphological analysis by TEM revealed to obtain a dispersed phase nanostructured for the blend with addition of 3%wt of compatibilizing. The effect of random copolymer as compatibilizing agent for the blends studied was also demonstrated by characterization of the mechanical properties of tensile and impact.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Estudo da secagem de sementes de embaúba em leito fluidizado
    (Universidade Federal de São Carlos, 2012-03-08)
    Corrêa, Luciano Jacob
    ;
    Sartori, Dermeval José Mazzini
    ;
    https://lattes.cnpq.br/6654974812569635
    Due to the importance of conservation of ecosystems and having Cecropia glaziovi.S as a pioneer species of the Tropical Forests, this plant becomes indispensable in reforestation areas altered wild. The drying operation is fundamental in the improvement of seeds, since it is not a seed recalcitrant. There is currently interest in studies of convective drying of the seeds on bed furniture, as in previous search has been shown to occur in fixed bed preferential channels and agglomerations of particles. The objective of this work is to study the fluidized bed capable of carrying out the drying of seed of native plants with the maintenance of physical and physiological properties. The comparison between the methods of decomposition and scraping the inflorescences wet and dry extraction showed that the wet method is more suitable for this kind of seed. The fluid dynamics of the contact between the seed and the fluid was drawn from measurements of pressure drop and air flow rates increasing and decreasing the bed. Using the method of SOGAB, demonstrated the uniformity of velocity and temperature in the entrance region of the measuring cell. The analyze the fluid allowed to obtain the information on the fluidisation characteristics curves, while the drying tests enabled the knowledge of the effects of temperature and velocity of the drying air on the properties of the seeds. The data obtained were compared with empirical equations and the resulting semi-empirical literature. Since the Page equation is analyzed between the equations that best represents the experimental data according to statistical criteria adopted. Assessment of germination, regardless of substrates, which are germitest paper germibox tanks and soil showed that the seeds are suitable for replanting. It was possible to obtain, after drying, seed with adequate humidity values for the storage and physiological qualities contribute to the perpetuation of these embryos and dissemination of higher plants in nature.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Análise do ciclo de vida energético de projeto de habitação de interesse social concebido em light steel framing
    (Universidade Federal de São Carlos, 2012-03-08)
    Carminatti Júnior, Riberto
    ;
    Paliari, José Carlos
    ;
    https://lattes.cnpq.br/9387796929252598
    ;
    https://lattes.cnpq.br/7770833599788902
    The construction industry in Brazil has great importance both socially and economically, but generates more than 50% of municipal solid waste and consuming large quantities of raw materials, energy and water. Thus the sector is strategic under the environmental point of view, since small changes in their processes cause the reduction of environmental impacts. To meet the current housing shortage, many building systems are being employed in the country, among which, the Light Steel Framing (LSF), which consists of a rational building system, and industrial productivity. The aim of this study was to simulate the amount of embodied energy original (EEi) of a standard project aimed at social housing using the LSF as a constructive system, applying the concepts of Life Cycle Analysis of Energy (ACVE). To achieve this goal initially was held to review the literature on sustainability, and LSF construction system ACVE. Following the adjustment was made for a project for social housing in structural masonry designed to LSF. From the specifications for materials and components, their respective values of the quantitative EEi and held the simulation of the quantity of EEi considering three scenarios: project conceived in structural masonry concrete block, masonry, structural ceramic blocks and LSF. Comparing the results of three simulations, it was concluded that the project designed masonry structural ceramic blocks showed the lowest absolute value of the EEi in relation to other systems simulated (117.6 GJ and 3.0 GJ / m² ), with the LSF presented an intermediate value (154.3 GJ and 3.9 GJ / m²), but very close to the masonry of ceramic blocks, while designed masonry concrete blocks had a higher value (262 , 0 GJ and 6.6 GJ / m²), largely due to the high value of IAS adopted for the concrete. It is noteworthy that these results should not be extrapolated as EE values were used for materials and components used in these construction systems referenced in the international literature, which indicates the need to build a national database about.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Avaliação de um programa de formação sobre recursos de alta tecnologia assistiva e escolarização
    (Universidade Federal de São Carlos, 2012-03-09)
    Lourenço, Gerusa Ferreira
    ;
    Mendes, Enicéia Gonçalves
    ;
    https://lattes.cnpq.br/1474728505225459
    The right to an appropriate education for students with cerebral palsy requires the provision of resources that will help individuals to improve their performance in everyday tasks more efficiently and independently. The term assistive technology is a term used to refer to a broad range of devices and services, helping individuals achieve greater success in their activities, by improving their functional capabilities. In the case of students with cerebral palsy, assistive technology, which includes devices that involve advanced electronic and computer-based technology, can ensure learners have full access to the curriculum. However, implementation of such a system is a complex process, because it includes students of varying learning abilities; apparatus; task to be performed; and the environment; and moreover, an essential element of its successful implementation is the involvement of a skilled and experienced team of professionals. The aim of the study was to develop and implement a specific assistive technology training program to facilitate the learning process for students with cerebral palsy, and evaluate their effects. The collaborative research project encompassed the development of a training program and its subsequent implementation with a team of professionals in a special school in a town located within the state of São Paulo; and then this program was further evaluated. The participants were nine special education teachers and five professionals of the interdisciplinary team (physiotherapists, speech therapists and psychologist). Nine students with cerebral palsy also participated. The data were collected through focus groups, field notes, open questions on the questionnaires, and videotaping. The results show that the program was effective in promoting positive training for using these resources, and furthermore, that collaborative working between staff and researcher was of overriding importance. The challenge is to find out how to promote the concept into practical actions in order to meet the requirements of established methods. From the results, systematic reviews were carried out and then it was recommended the adoption of a new model for training in this area and to be used within the country, in a didactic format, that enables professionals to be acquainted with their new roles, for successful implementation of assistive technology as tools to access to learning, permanence, and the accomplishments in the development of inclusion process.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Avaliação das condições operacionais na taxa de evaporação de água em leito de jorro
    (Universidade Federal de São Carlos, 2012-03-09)
    Bitti, Maisa Tonon
    ;
    Freire, José Teixeira
    ;
    https://lattes.cnpq.br/2270677706718167
    ;
    https://lattes.cnpq.br/5406791392147422
    In this work, the influence of operating conditions on the evaporation rate of water was analyzed for drying in a spouted bed. Experiments were done for two different inlet air geometries and inert particles loads for variable paste feed flow rates and inlet air temperature and velocity. Distilled water was employed as standard paste and glass beads of 2,18mm and 2512,6 ± 0,1kg/m3 as the inert phase. The drying chamber consisted essentially of an inox cylindrical column with 120cm in height and 30cm in diameter, and a conical bottom with an angle of 60° and 23cm high. The orthogonal central composite design was used to specify the experimental conditions. Inlet air temperature and velocity, bed pressure drop, exhaust temperature and dry and wet bulb temperature at the cyclone were measured during the experiments. Results have showed that the inlet air geometry had a weak influence on the bed fluidynamic stability. The maximum evaporation rate for both inlet air geometries was of 60ml/min, under operating conditions of 115ºC 1,55u/ujm and for 8,5kg particle load. An experimental correlation was proposed to estimate de rate of water evaporation as a function of the independent variables considered. With the experimental design analysis on the water evaporation rate it was possible to identify the most significant factors that influence the process. The information obtained in this work may be the basis for future work in this field with real pastes.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Na urdidura das ruínas : o percurso criativo de Douglas 'Machado em Um Corpo Subterrâneo
    (Universidade Federal de São Carlos, 2012-03-09)
    Vaz, Patrícia Costa
    ;
    Monzani, Josette Maria Alves de Souza
    ;
    https://lattes.cnpq.br/0505156751073470
    ;
    https://lattes.cnpq.br/7985361916073009
    The research contains the study of the creative process of the documentary Um Corpo Subterrâneo (2007), of the brazilian filmmaker Douglas Machado, with the theorist horizon of the studies of process critique. The link of our analysis is the understanding of the creation as a network in process , (SALLES, 2006, p.19) and, therefore, the research proposes the dive into the creation of the documentary, going beyond the analysis of the final film. We will go through the paths of creation with the genetic dossier of the director (note books, editing script , still, edited versions, interviews, among others), and data from his biography and filmography with value to this study that allows to build hypothesis and establish possible relations between these materials and the work that resulted from these connections. Those connections that define the narrative proposal chosen by the filmmaker, that privileges the construction of the other by the memory of the grief, and that point to the poetic project of the director.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Investigação do monitoramento metacognitivo de crianças diante de medidas de capacidades intelectuais
    (Universidade Federal de São Carlos, 2012-03-09)
    Zampieri, Marília
    ;
    Schelini, Patrícia Waltz
    ;
    https://lattes.cnpq.br/6185333517392859
    ;
    https://lattes.cnpq.br/5365770092073082
    Metacognition can be defined as the knowledge people have about their own cognitive processes, which can help them plan, monitor, regulate and assess their cognitive activities. Studies in the field have produced instruments and measures designed to assess metacognitive performance, many of them based on Flavell s Model of Cognitive Monitoring andas well as Nelsons and Narens model. The present study focused on gaining a better understanding of metacognitive monitoring, which is usually assessed through judgements, which represents one way of measuring metacognition. The aim of the present study was to investigate children s metacognitive monitoring during the execution of three subtests of the BMI (Multidimensional Battery of Child Intelligence), based on the Cattell-Horn-Carroll s model of intelligence. The subtests chosen assessed quantitative knowledge, crystallized intelligence and fluid intelligence. Participants were 44 fifht-year students, and each child was individually evaluated. Following each of the subtests, children were asked to estimate their performance. Results showed that children s repertoire included metacognitive abilities, and some metacognitive monitoring rates were better for quantitative knowledge . When these abilities were compared relative to cognitive performance, those with the highest scores on the intelligence subtests demonstrated better metacognitive monitoring. These results, obtained with Brazilian children, are compared with results reported in the international literature, and the implications in terms of promoting metacognitive training are discussed.
  • Loading...
    Thumbnail Image
    Item type:Item,
    O ensino de análise combinatória com aulas expositivas e fichas de aula em uma escola de ensino médio do interior paulista
    (Universidade Federal de São Carlos, 2012-03-09)
    Silva, Rodrigo do Carmo
    ;
    Malagutti, Pedro Luiz Aparecido
    ;
    https://lattes.cnpq.br/5462523657624050
    The following paper is a description of a research performed with second year of high school students, in a school in the inland of the state of São Paulo, over the topic of Combinatorial Analysis. Such topic is normally neglected in this teaching level. According to the National Teaching Parameters (Parâmetros Curriculares Nacionais PCN), the topic of Combinatorial Analysis is a theme with its place in the normal contents of the second year of high school, being so, the intervention was performed with students of this level. The intervention entails two Diagnoses Files (one applied in the beginning of the research, and the other in the end, serving as a comparison tool) and three Classroom Files, which take into consideration all the Combinatorial Analysis to be developed in High School. Each Diagnosis File has 5 exercises about counting, and each Classroom File has a summary of the theory developed with the participation of the teacher and the students in the form of theoretical and practical classes, and some exercises for the application of the theory developed in the Classroom File. Analysis, comments and comparisons collected by the teacher in the application of the classroom files are described in this paper. The final product of this Master degree thesis is available in the web site of Programa de Pós Graduação em Ensino de Ciências Exatas PPGECE (Postgraduate program of exact sciences teaching): www.ppgece.ufscar.br
  • Loading...
    Thumbnail Image
    Item type:Item,
    Produção de hidrogênio e etanol em reator anaeróbio de leito fluidizado: avaliação do desempenho de três materiais suporte em diferentes condições operacionais
    (Universidade Federal de São Carlos, 2012-03-09)
    Barros, Aruana Rocha
    ;
    Silva, Edson Luiz
    ;
    https://lattes.cnpq.br/9270383646400992
    Hydrogen and ethanol production using microorganisms is a promising area of technological development from a wide variety of renewable and alternative to this production is the use of anaerobic fluidized bed reactor (AFBR). One of the factors that most influence the performance of the AFBR is the material support, which must provide abrasion resistance, porous surface conducive to colonization by microorganisms, easy to achieve fluidization and ability to promote mass transfer between the medium and biofilm. Thus, the objective of this study was to evaluate the influence of different support materials (polystyrene - R1, grounded tire - R2 and polyethylene terephthalate (PET) - R3) on producing hydrogen and ethanol using three anaerobic fluidized bed reactors. Each reactor had a total volume of 4192 cm3 and was fed with media containing glucose as the carbon source (4000 mg L-1) with an influent pH around 5.0 and an effluent pH of about 3.5, a hydraulic retention time (HRT) of 8 1 h at a temperature of 23 2 ºC, with thermal treatment of the inoculum. For hydrogen production, the best performance was achieved with R2 (2.11 mol H2 mol-1 glucose), providing the highest H2 content in biogas (60%). In all reactors, the predominant soluble metabolites were acetic acid, butyric acid, lactic acid and ethanol, with small amounts of propionic acid. The reactor R2 produced more acetic and butyric acid (434.74 and 1013.61 mg L-1, respectively). However, reactor R3 showed a better performance for ethanol production (1941.78 mg L-1).
  • Loading...
    Thumbnail Image
    Item type:Item,
    Os Tupi, os Mbya e os outros: um estudo etnográfico da Aldeia Renascer - Ywyty Guaçu
    (Universidade Federal de São Carlos, 2012-03-09)
    Danaga, Amanda Cristina
    ;
    Peggion, Edmundo Antonio
    ;
    https://lattes.cnpq.br/9849805103860827
    ;
    https://lattes.cnpq.br/8230760897259077
    This dissertation presents an ethnographical research of the relationships between the Tupi Guarani from Village Renascer with the Guarani Mbya and nonindians. The purpose was to understand the formation history of the village within its particular context: the recording of the film titled Hans Staden. I try to articulate how this community is organized within an area of environmental protection and how they establish a strict dialogue, either with other indigenous groups or non-indians, based on the notion of "culture . There is a convergence between the Guarani Mbya, but is also an emphasis on demarcation of alterity. The Tupi Guarani highlights that come from a mixture of Tupinambá and Mbya, besides of the non-indians. This self-description is present in the speech of other villages of the coast of São Paulo state, which are part of a circuit of reciprocity, marking the existence of a Tupi Guarani territoriality that is multisite.
  • Loading...
    Thumbnail Image
    Item type:Item,
    O uso do hipertexto na aula de língua inglesa: promovendo o desenvolvimento da oralidade por meio de novas práticas de linguagem
    (Universidade Federal de São Carlos, 2012-03-09)
    Faria, Elaine Risques
    ;
    Paula, Sandra Regina Buttros Gattolin de
    ;
    https://lattes.cnpq.br/9228036521343293
    ;
    https://lattes.cnpq.br/6181109593794740
    This research aims at investigating the use of hypertext in the English Language classroom. The central argument of the study is to promote the development of the oral language through new language practices, because with the advances offered by the development of new information and communication technologies (NICTs), especially the Internet, there is a transformation in today´s society, also called the information society. This change reflects a need for the school, students and teachers, different from the one we had some time ago, since the NICTs take the educational processes beyond the walls of the school and they promote new ways of acquiring and producing knowledge, besides promoting new ways of interaction among the individuals emphasizing the necessity of developing the oral hability in English, for a good performance in both personal and professional activities. In this sense, we understand that the school becomes responsible for promoting new language practices, new literacies, mainly the digital literacy. But there is a lack of studies that show alternatives of changes in teaching and learning methodologies in order to meet this new generation of learners. Thus, in order to combine technology to the process of teaching and learning the English language and seeking to minimize the gap presented by Xavier (2005), regarding the lack of research that shows effective results of the use of hypertext in education, we chose using hypertext as a resource to promote oral English language in an extracurricular course offered to students of a language and literature course. In this qualitative research of ethnographic base, we used a questionnaire, focus group interviews, self-reports and field notes as instruments of data collection, in order to answer the following guiding questions: 1) What is the student´s perception on the hypertext as a resource to develop the oral ability? and 2) Does the use of the hypertext and, consequently, of the Internet help to develop the digital literacy and the new roles of students and teachers in the information society? The data obtained revealed that the hypertext, through its characteristics of non-linearity and hypermodality, was effective in promoting the development of the oral language in English, and it also allowed the development of digital literacy at the same time that it led to the development of the new roles of teachers and students to act in today's society - the information society.
  • Loading...
    Thumbnail Image
    Item type:Item,
    Vivência dos trabalhadores da construção civil no contexto da gestão público-privado e os impactos para sua saúde
    (Universidade Federal de São Carlos, 2012-03-12)
    Borges, Elisa Silva
    ;
    Scopinho, Rosemeire Aparecida
    ;
    https://lattes.cnpq.br/4770451465556845
    ;
    https://lattes.cnpq.br/4239458999600653
    In this dissertation, it was possible to contribute to the discussion on the health of workers in the area of construction, housing projects promoted by the partnership between public and private bodies. Despite being an important sector for the Brazilian economy, the literature is scarce, especially in psychology, studies on how workers experience the impacts of the conditions and labor relations, offered by the managers on their health. Based on theoretical and methodological framework of Social Epidemiology, the psychodynamics of work and ergonomics of the authors, this work was to study how the servants and builders of a housing project in a municipality of São Paulo, experienced the relations and conditions work offered by local organization partnerships, business and Caixa Econômica Federal. To this end, we identified the different roles of the implementing partners of the works; known relations and working conditions, rates of illness and related benefits were raised. Information was obtained through questionnaires, interviews, direct observations, archival research and analyzed by means of triangulation and the subsequent definition of categories, built from examination of consensus and disagreements identified in the content of the speeches. The results showed that the work funded by the Pro-House was marked by the logic of capital, which led to poor conditions and labor relations. Workers who accompanied the insertion of the master builder, first as a facilitator of communication with managers and, secondly, as loss of control over small decisions made by the collective. The qualification, even if not provided by the managers, through courses, when the organization of work allowed, workers develop new skills. Security measures at work were palliative, but the workers were used on defensive strategies and mobilization, which differed according to the employment relationship. However, some workers became ill or resigned because they could not always overcome the organization of work.
  • «
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • ...
  • 948
  • »
Siga as redes sociais do SIBi
Contato

Repositório Institucional da UFSCar (RI UFSCar)

Av. Biblioteca Comunitária, Campus São Carlos

Rod. Washington Luís, km 235 - SP-310

São Carlos, SP, 13565-905 (16) 3351-8477

Email: repositorio@ufscar.br

Acessos ao repositorio.ufscar.br
Consultar estatísticas de acesso

DSpace software copyright © 2002-2026 LYRASIS

  • Accessibility settings
  • Privacy policy
  • End User Agreement