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Manipulação de spin em diodos de tunelamento ressonante não-magnéticos tipo-n
(Universidade Federal de São Carlos, 2010-04-01)
Santos, Lara Fernandes dos
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Gobato, Yara Galvão
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https://lattes.cnpq.br/7558531056409406
;
https://lattes.cnpq.br/1971364294897798
The aim of this work was to study the spin effects in non-magnetic asymmetric n-type resonant tunneling diodes (RTD). For this purpose, we have used transport and polarization resolved magneto-photoluminescence measurement techniques. The optical polarization degree from quantum well (QW) and contact layers regions was studied as a function of voltage bias and magnetic field . In general, we have observed that the optical polarization and the excitonic spin-splitting from the QW emission is sensitive to the voltage bias. The contact layers emission as a funcition of voltage bias was also investigated under fixed magnetic field and it has shown large degrees of negative circular polarization. This behavior was associated to the occupation of the spin-split valence band in the GaAs bulk. We have also observed that the bi-dimensional electron gas (2DEG) emission is magnetic field favored by the magnetic field, as it has been reported in the literature. However, this study revealed that this emission also can be voltage bias induced. In addition, we unexpectly observed that the 2DEG-H and the 3D bulk emissions can exhibit up to -100% and +90 % of optical polarization degree respectively, depending on the voltage conditions. Emissions from the QW and contact layers were also investigated as a function of the magnetic field. We have observed that the polarization from QW and the 2DEG-H have an oscillatory behavior at some integer filling factor. Our results show that the circular polarization of the carriers in the QW should depend on various mechanisms, including the Landè g-factors of the different layers and the spin-polarization of the carriers in the contact layers and the density of carriers along the structure.
Comportamento térmico e mecânico de resinas termocuráveis para aplicação como revestimento adesivo em fios esmaltados
(Universidade Federal de São Carlos, 2010-04-01)
Prataviera, Rogério
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Pessan, Luiz Antonio
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https://lattes.cnpq.br/8276650236213537
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https://lattes.cnpq.br/5895158357997353
Selfbonding magnet wires are composed by two or more polymeric cover layers, being the inner layers thermosetting and the over coat composed of a thermoplastic cross-linkable layer. These wires are used in several magnetic wire coil applications, such as TV deflecting coils, coils for small motors, electrical coils for automotive, coil speakers, etc. In general, the bondable layer is activated by heating, joining the turns irreversible, even when heated to high temperatures or exposed to solvents. During this procedure the material change from a thermoplastic one to a thermosetting material, being of great importance the study of properties such as glass transition temperature and viscosity behaviour. It was used a cross-linkable polyester resin and a single component epoxy resin in this work. These materials were characterized by thermogravimetry analysis (TGA), thermo-mechanical analysis (TMA), differential scanning calorimetry (DSC) and infrared spectroscopy (FTIR). It was possible to evaluate the effects of residual solvent and the crosslinking of the materials by the thermomecanical response of TMA, from which it was determined the glass transition temperature (Tg). This transition was affected by the residual solvent and the curves after Tg shows a second transition which was attributes to softening temperature associated with the crosslink degree of the materials. It was possible to quantify the loss of residual solvent of the polymer in each cycle of TMA by TGA. DSC make it possible to study the kinetics of cure of epoxy resin which shows a polymerization kinetic of order n = 1,2 and an average activation energy of 120 KJ/mol.
Avaliação das atividades citotóxicas de alguns complexos fosfínicos de rutênio (Células tumorais MDA-MB 231)
(Universidade Federal de São Carlos, 2010-04-05)
Lima, Benedicto Augusto Vieira
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Batista, Alzir Azevedo
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https://lattes.cnpq.br/6469642481998660
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https://lattes.cnpq.br/1862964381184171
In this thesis complexes of general formula: [Ru(NS)(bipy)(PP)]PF6 (NS = 2-mercaptopyridine, 2-mercaptopyrimidine, 4,6-dimethyl-2- mercaptopyrimidine and PP = dppf, dppp, dppe); [Ru(pic)(bipy)(PP)]PF6 (pic = picolinate; PP = dppf, dppp, dppe and dppm), [RuCl(bCN)(bipy)(PP)]PF6 (bCN = benzonitrile; PP = dppf and dppe), and [RuCl(bCN)(NN)(dppb)]PF6 (NN = bipy, Mebipy and phen), were synthesised from the precursor complexes cis- [RuCl2(NN)(PP)] and characterized by the usual techniques: 1H and 31P{1H} NMR, IR, UV-Vis, molar conductimetry, elemental analysis, cyclic and differential pulse voltammetry and single-crystal X-ray diffraction (except for the compounds [Ru(pic)(bipy)(dppp)]PF6, [Ru(pic)(bipy)(dppm)]PF6 and [RuCl(bCN)(Mebipy)(dppb)]PF6, which suitable single crystal were not obtained). The 31P{1H} NMR spectras of the new compounds showed that the phosphorus atoms were more deshielded than in the correspondent precursor. The E1/2 values of the complexes containing the ligands NS, pic and bCN were higher than those observed in the precursor complexes. The complexes containing the ligand dppf presented two redox process, which were assigned to the redox pairs FeII/FeIII and RuII/RuIII respectively, according to the results of the kinetics experiments monitored by differential pulse voltammetry and 31P{1H} NMR techniques. The molar conductimetry and elemental analysis assays corroborated the proposed formula and the single-crystal X-ray diffraction study of these complexes confirmed their structures. The νCN in the complexes [RuCl(bCN)(NN)(PP)]PF6 were higher (~+8 cm-1) than that observed in the free ligand (2229 cm-1). Also, it was avaluated in vitro antitumor activity of some of the compounds synthesised herein against mammary cancer cell line (MDA-MB-231), murine sarcoma, as well as against M. tuberculosis (H37Rv); some of them presented high activity.
A politização do direito na magistratura: ativismo jurídico via associativismo de juízes, uma análise da AJD e da militância pelos direitos humanos
(Universidade Federal de São Carlos, 2010-04-06)
Targa, Leandro Garcez
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Martins Filho, João Roberto
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https://lattes.cnpq.br/6820035631009823
Caracterização biológica da ictiofauna carnívora da Represa do Beija-Flor, Estação Ecológica de Jataí, Luiz Antônio, SP
(Universidade Federal de São Carlos, 2010-04-06)
Fernandes, Daniela
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Verani, Nelsy Fenerich
;
https://lattes.cnpq.br/1862746100743391
This study was done in Beija-flor Dam a reservoir built in 1965 by damming the Beijaflor stream , a tributary of the Mogi-Guaçu river. It is deemed to be flooded lake to maintain constant communication with the river and stream Sunbird and there is no mechanism to control the entry and exit of water into the system. It is believed that the dam acts as a rest area and can feed and reproduce for migratory species that go up the Mogi-Guaçu river, as well as ponds. Therefore the study of feeding and reproduction of carnivorous fish that area, which as top predators can alter the ecology and evolution of prey populations, play an important, to the knowledge of the biology of the species in particular, and to understand the interactions of a fish assemblage and can therefore be used as a tool in the development of management strategies. To this end the present study consists of two chapters, the first addressing the population structure, reproductive aspects and feeding of the species Serrasalmus maculatus and the second, with an analysis of food, overlap and similarity between the diets of carnivorous species of Beija-flor Dam.
Espaços educadores no contexto do CESCAR (Coletivo Educador de São Carlos, Araraquara, Jaboticabal e Região/SP): do conceito à formação em educação ambiental
(Universidade Federal de São Carlos, 2010-04-06)
Kunieda, Edna
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Oliveira, Haydée Torres de
;
https://lattes.cnpq.br/5458113597909705
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https://lattes.cnpq.br/3042743081317977
The Coletivo Educador de São Carlos, Araraquara, Jaboticabal e Região (CESCAR), a environmental educators´s group, is guided by the precepts of Programa Nacional de Formação em EA (ProFEA) a Brazilian environmental education program that adopts the methodology of participatory-action-research proposed by the team of Board of Environmental Education of the Ministry of Environment (MMA). The proposal adopts environmental education (EE) emancipatory, transformative and criticism, fostering networking who values the local and regional initiatives. In order to understand the process of construction of CESCAR, we chose to analyse the phenomenon "educators spaces" by the experience of people who experienced this practice. We use the Hermeneutical methodology in association with Phenomenology, as strands of qualitative research. "Educators spaces" is a recent concept that in the Programa Municípios Educadores Sustentáveis a educational program that involve sustainable cities, offered by the same team of MMA, is defined as one that stimulates collective in improving their training and in the search for viable alternatives to sustainability. We take the research on "educator spaces" as a challenge because it is a concept still under development that requires discussion and build on this theoretical issue. We have established through similarities and oppositions, a framework about some of the spaces experienced by the group of environmental educators, through the analysis of twenty-four monographs. This angle allowed a glimpse of the mosaic of images assigned to the various "worlds lived" as well as to investigate the concept in a symbolic and existential perspective.
Aspectos da reprodução e da alimentação de Pseudoplatystoma punctifer (Castelnau,1855) (Siluriformes, Pimelodidae) na bacia do rio Teles Pires, Alta Floresta- MT
(Universidade Federal de São Carlos, 2010-04-06)
Luca, Alexander Stein de
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Verani, Nelsy Fenerich
;
https://lattes.cnpq.br/1862746100743391
;
https://lattes.cnpq.br/3790582483230060
This study was conducted in the middle portion of the Teles Pires river basin and four tributaries, from october 2007 to july 2009, the Alta Floresta region in northern Mato Grosso. The objective was to study the reproduction and diet of the cachara Pseudoplatystoma punctifer. Sampling of fish were collected monthly by using longlines placed on the banks of rivers, Stopped, Four Bridges, Santa Helena, Apiacás, Teles Pires and in Lagoa da Mata, The specimens captured were killed and underwent biometry were removed gonads and stomach identifying the sex and stage of gonadal maturation the naked eye. We estimated the degree of stomach fullness, frequency of occurrence for each item and feeding. Measurements of abiotic variables were collected at the sites of P. punctifer. We made monthly measurements of water temperature, transparency, conductivity, dissolved oxygen and pH always two stations in each area to collect fish. We collected 398 fish, and of these 223 are females and 175 are male, accounting for 56% and 44%, respectively. There was a differentiation in size and weight of the ovaries with the variation of the reproductive cycle, the ovaries of young immature body weights minimum of 4.5 g, reaching a maximum weight of 630 g in adult females mature testes weight ranged on average from 2.6 g to 474.0 g young immature to mature adults. During the water regime was a variation in the absolute frequency of occurrence of females and males at different stages of gonadal development. The young, males and females predominated in all the phases with higher frequency in the flood of 2008 for both sexes, reproductive adults predominated in the flood of 2009, with most males, males and females in reproductive adults not predominant in all home phases of the hydrological regime in the flood of 2009 for females and males from 2008 to ebb. You can measure the spawning P. punctifer occurs between January and February, with completion in april 2009, coinciding with the highest values of rainfall in the region. For females the estimated L50 was 72.5 cm and for males was 72.0 cm, (L100) is greater in females at 106 cm for males, 94.5 cm. Females were more numerous in the length classes between 63.0 cm to 81.0 cm, males in length classes from 58.0 cm to 78.0 cm. The sex ratio is presented as follows: between the months of october 2007 to march 2008, the ratio was 1 male to female and three months from november to december 2008 was the first male to 17 females. The estimated averages of condition factor (K) depending on the water regime, were higher among males in the full flood of 2008 and 2009, the female values were balanced, the condition presented by individuals during the study period did not vary significantly depending on the water regime. Among abiotic factors analyzed, rainfall indirectly contributing to reproduction of P. punctinfer. The seasonality, characterized by the phases of water regime in the region, influenced the greater supply of items to the diet, especially the full. Despite the great contribution of fish in the diet of P. punctifer, diversity of food items indicates a carnivorous diet generalist, because it presents no selectivity of prey including several families of fish and other food groups. The presence of terrestrial vertebrates in this study may indicate an opportunistic habit of the species.
Competitividade da cadeia produtiva de carne de frango em Mato Grosso: avaliação dos segmentos de avicultura e processamento
(Universidade Federal de São Carlos, 2010-04-07)
Melz, Laercio Juarez
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Souza Filho, Hildo Meirelles de
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https://lattes.cnpq.br/5556853714789339
Brazil is the second largest producer of chicken meat and the largest exporter. Thanks to an efficient system of coordination chain through contracts, mainly in southern Brazil. Competitiveness is the ability to maintain or enhance participation in markets, internal and external, in a sustained way. Mato Grosso has emerged in poultry production due to its large production capacity of grain, corn and soybeans. The research aimed to identify the determinants of competitiveness of chicken meat from Mato Grosso, with a focus on links in livestock production and slaughter/processing. The methodology uses drivers of competitiveness and assigns evaluations ranging from very unfavorable to very favorable for a number of factors internal to the drivers. The drivers selected were: institutional environment, technology, market structures, governance structures and coordination of the chain, firm management, inputs, storage and transport. A rapid appraisal methodology was used in order to provide information from interviews with selected key players, as well as data from secondary sources. In Mato Grosso, between 2005 and 2008, it was observed an increase of 69.94% in the number of poultry slaughtered in slaughterhouses registered at the Federal Inspection System. The slaughterhouses are located at Várzea Grande and Lucas do Rio Verde, Sadia, at Tangará da Serra and Sorriso, Anhambi, at Nova Mutum, Perdigão, at Mirassol D'Oeste, Frango Bom. The technology used in Lucas do Rio Verde, air-conditioned poultry houses, makes this county the best in terms of feed conversion of the state, between 1.6 and 1.5 kg / kg of chicken. In this county, the scale of production is far superior to the others. Contracts terms used in MT follows the integration model used in southern Brazil. In Nova Mutum, there is an organization representing the class of producers and MT is an association representing the industry, AMAVI. It was concluded that the determinants of competitiveness, to slaughter/processing link are the institutional environment, firm management and storage and transportation; to livestock production link are the institutional environment and market structure. The costs of inputs, especially maize, are cheaper in MT. However, due to the distances of the ports and the lack of other modes, shipping becomes expensive and the flow of production to international markets is impaired.
Comportamento das variáveis ventilatórias, cardiocirculatórias e metabólicas de homens saudáveis e com disfunções cardiorrespiratórias crônicas em repouso e durante o exercício físico dinâmico
(Universidade Federal de São Carlos, 2010-04-07)
Reis, Michel Silva
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Silva, Audrey Borghi
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https://lattes.cnpq.br/4855616925791895
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https://lattes.cnpq.br/1889922526777364
Patients with chronic heart failure (CHF) and chronic obstructive pulmonary disease (COPD) present significant exertional dyspnea. The peripheral muscle dysfunction appears to be the greatest impact on the inability to perform physical exercise. Additionally, there is respiratory muscle weakness caused by a limited supply of O2 and alteration of mechanical ventilation. In this context, in order to better understand the manifestations of these disorders and to establish management strategies, we have proposed the development of three studies. The first study was entitled Deep breathing heart rate variability is associated with respiratory muscle weakness in patients with chronic obstructive pulmonary disease . The purpose of the present investigation was to evaluate the influence of respiratory muscle strength on autonomic control of heart rate variability (HRV) in these patients. Ten COPD patients (69±9 years; forced expiratory volume in the first second (FEV1)/forced vital capacity (FVC) 59±12% and FEV1 41±11% predicted) and nine age-matched healthy male volunteers (64±5 years) participated in this study. The maximal inspiratory pressure was obtained in the sitting position. Then, electrocardiography signal was obtained in three conditions: 1) lying position for 15 min; 2) lying position during the respiratory sinusal arrhythmia maneuver (RSA-M) for 4 min; and 3) sitting position for 15 min. Data was analyzed by the time (RMSSD and SDNN indexes) and the frequency domains, in total power, low frequency (LF), high frequency (HF) absolute (ab) and normalized (nu) units and LF/HF ratio. Regarding the RSA-M indexes, the expiratory/inspiratory ratio (E/I) and the inspiratory/expiratory difference (ΔIE) were calculated. The patients with COPD demonstrated significantly impaired cardiac autonomic modulation at rest and during RSA-M when compared with healthy subjects (ratio E/I: 1.1±0.06 vs. 1.2±0.1 e ΔIE: 7.0±3.5 vs 12.7±4.2, respectively). Moreover, significant and positive correlations between maximal inspiratory pressure (MIP) and the inspiratory-expiratory difference (ΔIE) (r = 0.60, p<0.01) were found. In conclusion, patients with COPD presented impaired sympathetic-vagal balance at rest and during RSA-M. In addition, cardiac autonomic control of heart rate was associated with inspiratory muscle weakness in chronic obstructive pulmonary disease. Based on this evidence, future research applications of respiratory muscle training may bring to light a potentially valuable target for rehabilitation. The second study was entitled to Deep breathing heart rate variability xviii is able to reflect the respiratory muscle weakness in chronic heart failure . The purpose of the present investigation was to evaluate the influence of respiratory muscle strength on autonomic control in these patients. Ten CHF (62 ± 7 years left ventricle eject fraction of 40 ± 5% and NYHA class I-III) and nine matched-age healthy volunteers (64±5 years) participated in this study. Heart rate variability (HRV) was obtained at rest and during RSA-M by electrocardiograph (as previously described). CHF patients demonstrated impaired cardiac autonomic modulation at rest and during RSA-M when compared with healthy subjects (p<0.05). Moreover, significant and positive correlations between MIP and IE-differences (r: 0.79), E/I ratio (r: 0.83), RMSSD (r: 0.77), SDNN (r: 0.77), LFab (r: 0.77), HFab (r: 0.70) were found during RSA-M. At rest, significant correlations were also found. Patients with CHF presented impaired sympathetic-vagal balance at rest. In addition, cardiac autonomic control of heart rate was associated with inspiratory muscle weakness in CHF. Based on this evidence, recommendations for future research applications of respiratory muscle training can bring to light a potentially valuable target for rehabilitation. Finally, the third study: "Behavior of heart rate on determination of anaerobic threshold in healthy men: comparison with cardiopulmonary exercise testing and near-infrared spectroscopy" aimed to identify the anaerobic threshold (AT) obtained from the V-slope method , visual method on oxihemoglobin (O2Hb) and deoxihemoglobin (HHb) and compare the method with heteroscedastic (HS) applied to VCO2, HR and HHb data. Secondly, to assess the degree of agreement between the methods for determination of AT. Fourteen healthy men were subjected to incremental cardiopulmonary test (CPT) in the electromagnetic cycle-ergometer until physical exhaustion. At the same time they obtained the following biological signals: (i) ventilatory and metabolic variables - a breath to breath - measured by the Cardio2 System (Medical Graphics Corporation, St. Paul, MO, USAI), (ii) spectroscopy, quasiinfrared rays - NIRS (NIRO 300 - Hamamatsu Photonics, Japan), and (iii) heart rate through cardiofrequencymeter (Polar S810i). We observed temporal equivalence and similar values of power (W), absolute O2 consumption (mL/min) and relative O2 consumption (mL/kg/min) and HR (bpm) on determination of AT by the methods performed. In addition, by the Bland-Altman plot, HR (bpm) confirmed the good agreement between the methods with biases between -1.3 and 3.5. In conclusion: (i) all methods were sensitive in identifying the AT1, including the HS applied to FC, and (ii) the methods showed a good correlation in the identification of AT1. Thus the xix results support the FC, a methodology that is simple and economically feasible, seems to be a valid parameter in determining the AT of the individuals in our study. Therefore it remains to be clarified if these results can be replicated in patients with chronic cardiopulmonary disorders, contributing in safe, individualized and adequate prescribing physical exercise in rehabilitation programs.
Expansão urbana em Áreas de Preservação Permanente - APP: o caso de São Carlos-SP
(Universidade Federal de São Carlos, 2010-04-07)
Delcol, Rafaela Fabiana Ribeiro
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Francisco, José
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https://lattes.cnpq.br/0330065027402518
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https://lattes.cnpq.br/9187905255102435
The goal of the current research is to elaborate a study about the urban expansion in Permanently Preserved Areas (PPA) located on the banks of water bodies. The work aims to comprehend historical relationships that exist between cities and their hydro resources. We also analyzed ways humanity is interacting with its environment and how the consequences of this relationship deteriorate the quality of the urban ambient. Tijuco Preto, Gregório and Monjolinho streams located in São Carlos-SP were selected in our studies for the purpose of diagnosing problems endangering APPs, that despite the current regulatory apparatus have a critical and degradation situation, underestimating the treatment by public power and local society for these places.
A existência ética e religiosa em Kierkegaard: continuidade ou ruptura?
(Universidade Federal de São Carlos, 2010-04-07)
Sampaio, Laura Cristina Ferreira
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Marques, Silene Torres
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https://lattes.cnpq.br/4822141288006918
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https://lattes.cnpq.br/8635373522695785
The present study, based on the Kierkegaard s existential dialectics, intends to deal with ethical and religious existence in Kierkegaard, critically assessing the demands of religion and the limits of ethics. Upon establishing the relationship between the ethical and the religious, Kierkegaard using pseudonyms presents varied conceptions. In Fear and Trembling(1843) under the pseudonym Johannes de Silentio, he highlights the rupture between the ethical and the religious, showing that Abraham s story (Gn.22) holds a suspension of ethics; and under the pseudonym Vigilius Haufniensis, in the introduction to Concept of Anxiety (1844), he inserts, into his understanding of ethics, another distinction: between a first ethics , which encompasses Greek ethics as well as Hegel's speculative thinking, and a second ethics , established upon the Christian message, the concept of love to one s neighbor, demanded by a divine commandment, and the principle of ethical life. This second ethics is described a work titled Works of love , authored by way of his own name. In other words, it was attempted to clarify if there was a thorough exclusion or if it would be possible to think of an intrinsic reconciliation, due to some essential relationship between religious existence and ethical existence.
Trigonometria: a mudança da prática docente mediante novos conhecimentos
(Universidade Federal de São Carlos, 2010-04-07)
Oliveira, Thaís de
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Sampaio, João Carlos Vieira
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https://lattes.cnpq.br/8286887389013685
The aim of this work was to investigate an approach to the teaching of Trigonometry from the right triangle to its analytical form in the Unit Circle. In the work, it was intended to formulate activities with different methodologies, which related the necessity of the study of Trigonometry of the right triangle, as well as its relation with the trigonometric unit circle, generating the trigonometric functions. It was also intended to contextualize the different applications of these functions. The hypothesis of this work is that a significant learning for the students can be constructed by means of a new knowledge of the teacher. Such knowledge allows the teacher to exceed the limits of the blackboard and chalk, and to work with dynamism and movement involving the elements of Trigonometry. For such, four activities that explore Trigonometry were elaborated, and a sequence of applets was constructed, about the Unit Circle and the Trigonometric Functions, based on the free software of dynamic geometry GeoGebra. The majority of these activities has been applied in high schools where the author is a teacher.
GeoGebra e moodle no ensino de geometria analítica
(Universidade Federal de São Carlos, 2010-04-08)
Lucas, Rodrigo Dantas de
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Caetano, Paulo Antônio Silvani
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https://lattes.cnpq.br/0370219014539994
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https://lattes.cnpq.br/0034326475410715
This work involves the construction of a virtual learning environment (AVA) on fundamental concepts of Analytical Geometry (GA) using GeoGebra resources to be applied in a room of the 1st year of a Bachelor's Degree in Mathematics from a private college. Throughout its history the teacher develops ways of presenting the ideas you want to convey and that is the essence of pedagogical reasoning. As a teacher of this subject, I note in my career and the exchange of experiences with other professionals, a common sense about the mechanization of techniques and lack of connection between algebra and geometry, as in this discipline. Reflecting, experiencing and telling me about this issue, I think much of this problem in a limited way that we present these ideas in our classes. The advent of information technology, especially software for dynamic geometry, can provide greater ease in viewing this connection. Motivated by the possibility of using dynamic geometry software in the teaching of GA, the use of Moodle to create an AVA and inspired by the discipline of Information Technology for Teaching Science and Mathematics, the curriculum component of the Masters in Teaching Professional Exact Sciences, idealized this work from the construction of the 3D viewer in GeoGebra and the creation of an AVA in Moodle. The AVA has been divided into four modules with the following basics of GA: points, vectors, lines and planes. These grounds were presented through Moodle resources in the form of theory, lesson and evaluation. The activities were conducted as semi-distance (in the computer lab school) and totally distance (in their students). We hope with this work is expanding the size that most students have to GA and the fundamental connection between algebra and geometry existing in this discipline, and encourage the use of technological resources as teaching tools.
Estudo e desenvolvimento de blendas ternárias biodegradáveis a partir de poli(ácido lático), poli(álcool vinílico) e quitosana
(Universidade Federal de São Carlos, 2010-04-08)
Grande, Rafael
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Pessan, Luiz Antonio
;
https://lattes.cnpq.br/8276650236213537
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https://lattes.cnpq.br/2232805898804829
The present study examined the use of poly(vinyl alcohol) as a compatibilizing agent between chitosan and PLA and as a diluent for chitosan in an approach where a dispersion chitosan in PVA produced by solution blending these materials are added to PLA in an melting procedure. We investigate ternary mixtures of PLA / PVA / chitosan system both the PVA / chitosan and the blends of PLA / PVA / Chitosan studied here were plasticized with glycerol to reduce the melting point of PVA and chitosan. The ternary blends were processed in a Haake rheometer at 140 °C with rotation of 80rpm. Measurements of FTIR, DSC, DMA were performed to verify the degree of mixing and characterize these compounds. It was observed that the presence of the blend PVA / Chitosan PLA results in changes in the crystallization upon heating and the presence of two valleys fusion indicating immiscibility of the system. The morphology of the blends was evaluated by scanning electron microscopy. The positive results of this processing method is innovative and represents a major advance in the study of polymer blends from natural polymers processed by melt processing. However, the biggest loss in mechanical properties observed in the ternary blends as well as the darkening of the dispersed phase during drying, suggest that the presence of solvent waste are sufficient to promote matrix degradation during processing.
Um ambiente virtual de aprendizagem para o ensino médio sobre tópicos de geometria analítica plana
(Universidade Federal de São Carlos, 2010-04-08)
Cunha, Mário César
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Caetano, Paulo Antônio Silvani
;
https://lattes.cnpq.br/0370219014539994
;
https://lattes.cnpq.br/5039860041865580
This study presents the construction of a virtual learning environment on topics of plane analytic geometry and its application in classrooms of public high schools in the city of Barra Bonita, São Paulo, Brazil. The environment, implemented in Moodle platform of Distance Education is supported by dynamic geometric viewers idealized by GeoGebra. It approaches points in the Cartesian plane, the distance between two points, midpoint, barycentric, angular coefficient, alignment condition of three points, equation of a line, forms of equation of straight lines, relative positions of two straight lines and perpendicular straight lines. This virtual learning environment contains activities in two units implemented using the tools of Moodle, including WEB page, Lesson, Forum and Questionnaire, always founded in the learning theories of Piaget, Vygotsky and Ausubel. All of this seeks a construction of knowledge through the interactivity with the approached topics, in an autonomous way and respecting the self-paced learner. It also aims the understanding of the concepts in a practical and dynamic way, not limited to the dissemination of the information in a pre-defined static way. In the dynamic of such application, the virtual theoretical activities are followed by practical issues incorporating the content studied, with frequent assessments in the form of discussion forums, quizzes and tests with questions randomly selected from a database of the virtual environment. Despite the difficulties, the first unit can be successfully completed verifying a significant learning of the use of dynamic geometry simulators, with the students showing greater interest and focus on the approached issues.
Desenvolvimento da habilidade sentado para de pé em crianças
(Universidade Federal de São Carlos, 2010-04-08)
Costa, Carolina Souza Neves da
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Rocha, Nelci Adriana Cicuto Ferreira
;
https://lattes.cnpq.br/2035754554780009
;
https://lattes.cnpq.br/1279365864279654
Análise dos perfis de atuação profissional e de competências relativas à inteligência competitiva
(Universidade Federal de São Carlos, 2010-04-09)
Amaral, Roniberto Morato do
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Alliprandini, Dário Henrique
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https://lattes.cnpq.br/6958372164719600
With the aim of contributing to the improvement of efficiency and effectiveness of units of Competitive Intelligence (CI) in the area of people management, the goal of this study was to characterize the profile of Brazilian CI professional approach based on competencies, with a view to establishing the process of People management for competence-based (GPPC). Survey was the research method adopted and applied in the community of professionals involved in CI in Brazil. The results were: a) characterization of the professionals involved with CI b) indicators on the performance of CI in Brazil, c) identification of the attributes of competence of greatest need in carrying out intelligence activities d) identification of the modes of action as dedication to the functions of CI coordinator, analyst, collector, e) display the influence of experience in CI performance on the stages of intelligence, the abilities of the professional and the functions of CI and f) consolidation of a glossary of attributes competence (knowledge, abilities and attitudes) for CI. From the results obtained and the discussion arose around the issue of competence in CI, it was concluded that CI professionals have different profiles of competence according to their performance and professional experience, identified the professional profile and abilities on the CI, its real value to the area of CI will be achieved through the use and application potential in developing a comprehensive model of GPPC applied to teams of CI.
Função excêntrica dos músculos abdutores e rotadores laterais do quadril no controle dos movimentos do membro inferior e no rendimento funcional
(Universidade Federal de São Carlos, 2010-04-09)
Baldon, Rodrigo de Marche
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Serrão, Fábio Viadanna
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https://lattes.cnpq.br/8137335642635433
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https://lattes.cnpq.br/9854034655055173
Baile do Carmo: festa, movimento negro e política das identidades negras em Araraquara-SP
(Universidade Federal de São Carlos, 2010-04-09)
Tenório, Valquíria Pereira
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Monsma, Karl Martin
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https://lattes.cnpq.br/5133375697266421
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https://lattes.cnpq.br/6991656036901108
This PhD research examines the construction of identity in an annual celebration, a playful event known as Baile do Carmo, carried out by the black population of Araraquara for over 70 years. It is possible by means of a specific event to discuss the invisibility of this population in local history, including the dynamic process of construction affirmation of black identity. To do this, I analyze how this event took shape over various historical periods and its relations with the Brazilian black movement, showing the changes in the Baile and the nature of its presence in the collective memory of the black population. I also try to understand how the tradition of the Baile do Carmo was (re) created and its role in the fight against discrimination and racism. This party provides a way to discuss relations between black and white people in Araraquara. The examination of these relations was only possible through the collection of oral interviews with participants and non-participants, both black and white, as well as extensive bibliographic study of ethnic and racial themes.
Desenvolvimento cultural da criança na Educação Infantil: contribuições da Teoria Histórico-Cultural
(Universidade Federal de São Carlos, 2010-04-09)
Assis, Muriane Sirlene Silva de
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Mello, Maria Aparecida
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https://lattes.cnpq.br/8338726751746542
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https://lattes.cnpq.br/3283708100330653
The main issue in this dissertation is the process of child s cultural development in primary school (from 0 to 5 years old). We aimed at identifying whether the school and family contribute to children s cultural development, and how this process occurs, through the analysis of concepts from the children themselves, the teachers, the school director, the educational staff, school officials and students parents. The methodological procedures used were based on a qualitative approach; we collected data through semi-structured interviews and questionnaires. Cultural-Historical Theory served as the theoretical foundation for our work; therefore, we believe that cultural development results from appropriations and objectifications made by individuals from their social relations throughout life. Cultural development is a condition for individuals humanization. The data analyzed stated that the school and the family contribute to children s cultural development; however, this contribution was not so intentional or systematic. The social function of Primary School expressed by different participants in the survey was very similar and emphasized the role of school in children s preparation for Intermediate school (6-13 years old), and in the development of values and rules for living together. We realized that playing was appreciated both by children and adults, but children valued this activity by itself while adults often considered playing as a resource for learning school subjects, or simply as a way of occupying child s free time. Children s and adult s access to culture was restricted and limited, particularly to television, and that impoverished their possibilities of cultural development. Artistic and cultural activities were interpreted as didactical and pedagogical resources, and were rarely associated with leisure, fun, broadening of worldview, and thus, with cultural development. We hope, with the analysis undertaken in this research, to contribute to the thinking on the democratic and revolutionary dimension of the school in what concerns its role as an institution that should offer opportunities of access to increasingly sophisticated knowledge and experience, so that all children perform appropriations and objectifications that could result in their growing and continuous cultural development aimed at building a fairer and more equitable society.