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Mecanismos de controle da hidratação da magnésia visando sua utilização em concretos refratários
(Universidade Federal de São Carlos, 2009-06-30)
Amaral, Léa Fantin
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Pandolfelli, Victor Carlos
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https://lattes.cnpq.br/7369376873984839
;
https://lattes.cnpq.br/4269397952023027
The increasing demand in the last years enhanced significantly the steel industry production As a consequence, most of the aspects regarding its production had to be reviewed aiming an optimum output. Concerning this goal, the reducing in equipments idle time on refractory lining maintenance or replacement can be seen as an interesting technological advantages. Achieve better refractory is an accord named gain-gain for both: steel and refractory industry. For steel industry because the more refractory last, the more steel is produced and in the refractory industry because they can increase the aggregate value of their products. In this context, the development of MgO based monolithic refractory has widespread aiming to achieve a matching of advantages, such as absence of joins, facility of installation and repair, high basic slag corrosion resistance and high refractoriness. However, due to the hydration reaction of magnesia forming Mg(OH)2, its application in refractory area is limited. If this problem would be solved, superior properties for the refractories can be achieved. This work aimed to:1) Analyze the aspects that could affect the MgO hydration reaction and 2) Highlight additives that could minimize its drawbacks and,, at the same time, being viable concerning the real applications.
Caracterização de imagens em livros didáticos e suas contribuições para o processo de significação do conceito de equilíbrio químico
(Universidade Federal de São Carlos, 2009-06-30)
Kiill, Keila Bossolani
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Ferreira, Luiz Henrique
;
https://lattes.cnpq.br/4819009378941531
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https://lattes.cnpq.br/3094025825865221
This work studies images contained in Chemistry textbooks approved by the PNLEM/2007. The goals of this research were: a) to characterize these images, discriminating those that compose Chemical Equilibrium Chapters, according to the chemical knowledge dimensions (macroscopic, submicroscopic and symbolic); and b) to evaluate the contributions brought by these images to the significance trial of that content. The methodology for data collection was the double-blind one, in which each researcher, independently, proposes a classification, that is later validated by means of statistical instruments. It was elaborated a taxonomy for data collection, wherein the categories of analysis were discriminated. To analysis of the images, is necessary consider the interrelations between them, therefore, in a same visual representation, is possible have the knowledge represented in two more dimensions. The theoretical referential substantiates itself in the meaning learning, proposed by Ausubel and collaborators, and also in the signs conceptions developed by Pierce. The analysis results showed that, in the total, the best part of the images represents the chemical knowledge considering only the macroscopic aspect or not classified. For the chemical equilibrium chapter, in general, proposed representations for helping the understanding of that content are also of macroscopic nature or not classified. Regarding to the trial of significance of chemical equilibrium content, contributions of others contents such as chemical reaction, kinetic chemical and stoichiometry were also considered for images analysis. Thus, it was possible to conclude that representations found in textbooks are of macroscopic nature and typify chemical systems properties. Moreover, an expressive amount of images merely presents illustrative character and other few correlates dimensional aspects. Therefore, images contained in general textbooks poorly collaborate to the significance trial of chemical equilibrium content.
PAIGC : A face do monopartidarismo na Guiné-Bissau (1974 a 1990)
(Universidade Federal de São Carlos, 2009-06-30)
Semedo, Rui Jorge da Conceição Gomes
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Braga, Maria do Socorro Sousa
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https://lattes.cnpq.br/2311094074614215
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https://lattes.cnpq.br/7911343393159655
This research investigates the political dynamics of PAIGC (African Party for the Independence of Guinea and Cape-Verde), that during and after the process of getting the independence from the portuguese, wich was done through a long liberation war, has a tremendous help from the mass. PAIGC officially conquered the political power in 1974 and ruled for a period or 16 year, as a sole political party. During this period, it showed a lot of dificulties to realize its program of governance. This fact leads to a fundamental question: how come that a party that counted with a strong base of help from the mass and acted as a sole political force that controlled the machinery oh the state was not able to implement its proposals of governance?
Variações no gene yolk em moscas das frutas do grupo fraterculus
(Universidade Federal de São Carlos, 2009-06-30)
Oliveira, Gustavo Castro de
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Brito, Reinaldo Alves de
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https://lattes.cnpq.br/8253066295947754
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https://lattes.cnpq.br/0816557348697162
Species of the fraterculus group are associated to the biggest damages to fruit crops due to the fact that they attack indiscriminately green and ripe fruits, making them pests of great economic importance. These species are hard to tell apart, even showing some potential criptic species. The understanding of the populational structure and biology of this species group is of paramount importance to strategies of management and control of these pests. Here, we investigate variation on the gene yolk em 37 individuals sampled throughout the species distribution in Brazil seeking to better understand the populational structure of this species group in Brazil. Our data indicated existence of recombination, which lead us to analyze three different regions in the gene, 5 , mid, and 3 . These regions show high levels of nucleotide diversity intra and interspecifically for all three gene regions investigated. The use of Nested Clade Phylogenetic Analysis independently used on these regions indicate two main results that occurred more than one throughout our analyses. The first is a range expansion from north-NE populations towards the south, mostly related to specimens of Anastrepha fraterculus. The second common event, detected eight times, is restricted gene flow with isolation by distance (IBD). Dating of such events indicated that they are temporarily congruent which might indicate that the lack of IBD in other levels of the analysis might be caused either by sampling limitations or an excess of local gene flow that tampers out as we move farther in space. Our results of the gene yolk have provided us with a better understanding of the levels of local variation of this marker of for the species that may help us determine the evolutionary processes that shaped the species group current distribution.
Mecanismos adrenérgicos do núcleo parabraquial lateral e da área Kölliker Fuse/A7 no controle da ingestão de água e sódio
(Universidade Federal de São Carlos, 2009-06-30)
Gasparini, Silvia
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Menani, José Vanderlei
;
https://lattes.cnpq.br/1284209984441589
The blockade of serotonergic receptors with methysergide or the activation of α2-adrenoceptors with moxonidine into the lateral parabrachial nucleus (LPBN) increases water and 0.3 M NaCl intake in rats treated with furosemide (FURO) combined with captopril (CAP). Besides LPBN, also the Kölliker-Fuse nucleus/A7 area (KF/A7 area) located at the rostral and lateral end of the LPBN is important for water intake. In the present study we investigated the effects of bilateral injections of noradrenaline (the endogenous neurotransmitter for α-adrenoceptors) alone or combined with the α2-adrenoceptor antagonist RX 821002 into the KF/A7 area or into LPBN. The effects of moxonidine, methysergide or proglumide on FURO + CAPinduced water and 0.3 M NaCl intake were also investigated. In addition, we tested simultaneously water and sodium intake and renal excretion in rats treated with FURO + CAP that received noradrenaline into the KF/A7 area to investigate the effects of this treatment on water and sodium balance. The effects of noradrenaline into KF/A7 area in rats treated with FURO + CAP on cardiovascular responses were also investigated. Male Holtzman rats with bilateral stainless steel guide-cannulas implanted into KF/A7 area or LPBN were used. FURO + CAP-induced 0.3 M NaCl intake strongly increased after bilateral injections of noradrenaline (80 or 160 nmol) into LPBN (26.5 ± 5.9 and 20.7 ± 2.0 ml/2 h, vs. salina: 4.4 ± 0.9 ml/2 h) or into the KF/A7 area (31.5 ± 6.1 and 25.9 ± 4.7 ml/2 h, vs. salina: 7.2 ± 1.6 ml/2 h). However, increases in water intake caused by noradrenaline injected in KFA7 area are not consistent. Bilateral injections of RX 821002 into LPBN or KF/A7 area abolished the effects of noradrenaline in the same areas on 0.3 M NaCl intake (7.5 ± 2.5 and 9.8 ± 4.4 ml/2 h, respectively). Moxonidine (0.5 nmol) injected bilaterally into the KF/A7 area increased 0.3 M NaCl intake (39.5 ± 6.3 ml/3 h v.s. vehicle: 5.7 ± 1.5 ml/3 h) and water intake (26.8 ± 4.2 ml/3 h v.s. vehicle: 11.6 ± 1.3 ml/3 h), while methysergide (4 μg) or proglumide (50 μg) into the KF/A7 area did not alter 0.3 M NaCl or water intake. Injections of noradrenaline (80 or 160 nmol/0.2 μl) into the KF/A7 did not alter urinary volume, potassium excretion or sodium excretion. However, noradrenaline into the KF/A7 induced a positive cumulative sodium balance (5179 ± 1045 μEq/3 h v.s saline: 2 ± 545 μEq/3 h) and a cumulative water balance (25.2 ± 4.5 ml/3 h v.s. saline: 2.5 ± 4.1 ml/3 h). In rats with a polyethylene tubing (PE-10 connected to a PE-50) inserted into abdominal aorta through femoral artery, injections of noradrenaline (80 or 160 nmol/0.2 μl) into KF/A7 area promoted a powerful increased in blood pressure (69 ± 12 and 61 ± 10 mmHg, respectively). The results of the present study suggest that α2-adrenoceptor activation is a common mechanism in the KF/A7 area and LPBN to facilitate sodium intake. In addition, injections of noradrenaline into the KF/A7 area induce renal responses to reduce sodium excretion. However, the serotonergic or cholecystokinergic mechanisms that control sodium intake are present in LPBN, not in the KF/A7 area.
Análise das topografias de controle de estímulos envolvidas em escolhas de acordo com o modelo em indivíduos com Síndrome de Down
(Universidade Federal de São Carlos, 2009-06-30)
Vasconcellos, Mariliz
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Rose, Julio Cesar Coelho de
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https://lattes.cnpq.br/3386857761295187
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https://lattes.cnpq.br/2628411501148247
The formation of equivalent stimuli classes is a psychological phenomenon that has important characteristics for the experimentation of processes involving symbolic behavior acquisition. This kind of behavior has been the target of a wide variety of contemporary studies which have also demonstrated the possibility of such approach to generate symbolic behavioral repertoires based only on the teaching of some relations between stimuli. It is vital to investigate the parameters that optimize the establishment of equivalent stimuli classes desired by the researcher when defining the behavior to be installed through the procedure of matching-to-sample (MTS). Studies in the area have widely shown that after training A1B1 and B1C1, there is an emergency of some relations, such as B1A1, C1B1, A1C1 and C1A1, which demonstrate, respectively, the properties of reflexivity, symmetry, transitivity and equivalence. One of the parameters that determine the effectiveness of a procedure on class formation is the type of control relation exercised by the comparison stimuli in MTS attempts. Therefore, the present study aimed to identify the role of specific types of training of conditional discriminations in the establishment of relations of control for selection and rejection. Study participants were two teenagers with Down syndrome. The training consisted on MTS sessions with and without mask in two training types: non-nodular and nodular. The former occurred by presenting stimuli which function was either model or comparison only, and the latter was characterized by presenting stimuli with dual function, i.e. model and comparison simultaneously. Verification testing of the control relations established at baseline was made after non-nodular training and after nodular training, and only then verification testing of behavioral emergency was made. Two stimuli sets involved attempts with mask, while other two consisted of attempts without a mask. The experiment was specifically designed in a way that the training of a stimuli set with mask has occurred almost simultaneously with the training of a stimuli set without mask. Thus, the influence of historical undesirable variables was avoided on deductions made from performance comparison of the two different attempts (with or without mask). Results demonstrated, generally, that the training procedure used was very effective in teaching and formation of classes, what made difficult even to compare the greater effectiveness of the procedures with or without use of mask in the training of conditional relations. It is suggested the replication of this study, with a larger number of participants of this same population, so that it is possible to evaluate the data generality.
Subjetividade, o si-mesmo e o narcisismo: uma leitura freudiana
(Universidade Federal de São Carlos, 2009-06-30)
Silva, Américo Soares da
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Monzani, Luiz Roberto
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https://lattes.cnpq.br/2036732603638197
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https://lattes.cnpq.br/1157214452728090
This work has like finality carries out an inquiry boarding that problem of self from the Freudian theory. To carry out this proposal, we use principally that concept of narcissism; we establish an articulation so much with different aspects of that Freudian psychoanalysis, as also we did use of some literary works that allowed to us to build a parallel between that psychoanalytic approach and the philosophical one. In this form we believe to be possible a relevant discussion to outline the questions wrapping, in a more general way, the subjectivity and, in individual, the problem around the formation of self.
O público e a compreensão da informação nos rótulos de alimentos: o caso dos transgênicos
(Universidade Federal de São Carlos, 2009-07)
Furnival, Ariadne Chloe Mary
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Pinheiro, Sonia Maria
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https://lattes.cnpq.br/1291482506649810
A rotulagem constitui uma importante interface da informação técno-científica com o público em geral. Apresentam-se resultados de um estudo cujo objetivo foi o exame dos hábitos de leitura dos rótulos dos alimentos por parte dos consumidores, e a sua compreensão das informações neles contidas. A pesquisa foi realizada por meio de grupos focais e a aplicação de um questionário. A pouca leitura de rótulos constatada aponta implicações relevantes no contexto da importância atribuída à rotulagem dos alimentos transgênicos.
O padrão de dispersão é sexo-assimétrico nos Euglossíneos (Hymenoptera: Apidae: Euglossini)? Um estudo de caso: Euglossa cordata
(Universidade Federal de São Carlos, 2009-07-01)
Cerântola, Natália de Campos Muradas
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Del Lama, Marco Antonio
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https://lattes.cnpq.br/7198095288825585
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https://lattes.cnpq.br/5020640711648642
The Tribe Euglossini consists of relatively large bees, with metallic skin and bright color. Their extremely long tong enables them to use nectar resources that are inaccessible to other bees. Equipped with high capacity of dispersal, they are able to survive in disturbed environments, and compose even 25% of bees diversity in some forests. As important pollinators of many Angiosperms, especially Orchidaceae, they are fundamental to maintaining the stability of plant communities. Some species of the tribe are abundant in cities, in particular, Euglossa cordata. The genetic variability of five urban populations of this species was estimated by López-Uribe (2006) in adults caught while they were collecting nectar in flowers of Thevetia peruviana. The lack of structure found from nuclear loci (allozymes) and significant population structure for the 16S mitochondrial region are evidences that males and females showed different patterns of dispersion, where females are philopatrics while males are dispersers. To corroborate this hypothesis, this study aimed to determine the genetic structure of populations of E. cordata collected in flowers of T. peruviana in cities along a north/south transect of the State of São Paulo using mitochondrial and nuclear genetic data. The genetic differentiation found in the examined 12 populations was significant for the data sequence of mitochondrial cytb region (Fst=0.15; P<0.05), unlike observed for nine microsatellite loci (Fst=0.008; P>0.05). Allozymes loci were analyzed with the primary purpose of checking the individuals species; most polymorphisms showed that the populations are homogeneous, similar to the microsatellite data. Thus, our data from nuclear genes strongly suggest that there is no evidence of population structure in E. cordata, whereas mitochondrial data suggest structured population and that geographical proximity influence the events of colonization. Our results indicate that dispersal and colonization in E. cordata are characteristic attributes of males and females, respectively.
Caracterização da logística de distribuição de hortaliças orgânicas na cidade de São Paulo
(Universidade Federal de São Carlos, 2009-07-02)
Terrazzan, Priscila
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Valarini, Pedro José
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https://lattes.cnpq.br/9101386053957180
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https://lattes.cnpq.br/0072562165481454
Organic production plays a key role in agro-social development, and in commercialization, distributors are of essential importance for the supply to the sale points of organic products. In that way, this dissertation investigates the key factors of the logistics of distribution of organic horticultural products in the city of São Paulo. The research was developed between April and October 2008, when were interviewed the representatives of supermarkets and of the distribution companies of organic products. Qualitatively, the work was done through the theoretical review, construction of forms and inferences on the information given by interviewees. The quantitative stage was the application form and the analysis and relations of data, to identify particularly: main actors representative of the distribution chain and their characteristics, how the management of logistics activity is done, the level of performance of distribution system. The result showed that these distribution systems, satisfy, in part, to technological and operational requirements for the supply to the supermarket. Three major groups represent the supermarket sector and their supply is basically made by eleven distribution companies, eight of which participated in the survey and provide an average of 1,187,000 units of fruit and vegetables per month. Supermarkets absorb 89% of the total sold by distributors. The performance of the distribution system is a little short of satisfying the supermarket, requiring better techniques for handling and transport. The distributors are going professional on the corporate planning and to work with the integration of the sectors of the company, which will require an optimization of its processes of operation and management. In this sense, they search for work with the development of the supply chain. Logistics activities are little measured and there is a low efficiency in carrying capacity of vehicles (the overall average is 77.5%). The availability of load return is less than 50%, and the cost of transport represents an average of 11.88% of sales of these distributors. The logistical successful arrangements may serve as a reference to the benchmarking of agents of the organic sector to the improvement of its logistics distribution.
APQP: caracterização da aplicação da metodologia de gestão de desenvolvimento de produtos em fornecedores dos setores de linha branca e automotivo
(Universidade Federal de São Carlos, 2009-07-02)
Pimenta, Laura Cunha Neto
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Pereira, Neocles Alves
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https://lattes.cnpq.br/3744216524256924
The exchange of knowledge and optimization of resources optimism are increasingly needed necessaries for companies´ Product Delevopment Process (PDP). The Product Quality Advanced Planning (APQP) is a structured method, contained in Norm ISO/TS 16:949:2002, which aims to define and execute the actions required for a PDP in order to ensure that the product satisfies the customer. It´s greatest contribution is to facilitate communication among all people and activities. Although the APQP has been used primarily by the automotive industry, the possibility to apply this method for the white goods industry is considered, mainly due to this industry has been precursor of many methods, such as lean production. Furthermore, the search for a developing standardized products method could facilitate the work of automotive and white goods suppliers. The lean production has also contributed to the optimization of resources and administrative proceedings in these industries. Thus, this standardized method could include the use of some lean production tools. The aim of this work is to characterize the use of APQP in white goods and automotive industries suppliers and more specifically, to evaluate the possible failures in these suppliers product development process, and to discuss the importance of tools in each step of APQP and the application of these to white goods industry. The hypotheses were made concerning the possible simplification of this standard method, the integration of areas, the knowledge obtained in the implementation of APQP and facilities of lean production and six sigma for the implementation of APQP. The chosen method for this work was the description of five case studies made in companies of the electro electronic and chemical fields, which are suppliers of both industries cited. In these companies a representative of the automotive and one of white goods industry were interviewed. The research finds that it´s possible to use the APQP method in the white goods as well as it shows white goods companies which have already requested it to suppliers. It also describes the PDPs of each company, highlights the major failures in the methods used and describes an overview of the automotive and white goods industries PDPs. A proposal to APQP application with some lean production tools is presented in the final chapters.
UbiComSPL: desenvolvimento baseado em MDA, de linha de produto de software no domínio de aplicações ubíquas
(Universidade Federal de São Carlos, 2009-07-03)
Oliveira, Raphael Pereira de
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Prado, Antonio Francisco do
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https://lattes.cnpq.br/2668568143800755
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https://lattes.cnpq.br/1900481113982922
This thesis presents an approach to Development based on Model-Driven Architecture, of Ubiquitous Applications Domain Software Product Lines. The approach uses Model-Driven Architecture to facilitate the modeling reuse of the same application in different architectures of the Ubiquitous Computing. With focus in the problem domain, the Software Product Lines core is developed and it is reused in the products construction. One of the assets that composed the Software Product Lines is the Ubiquitous Computing Framework, developed to attend the non functional requirements of Ubiquitous Computing. The CASE tool, called MVCASE, makes automatic part of the activities in the proposed approach.
Análise do processo de apropriação dos gêneros discursivos em práticas letradas socialmente valorizadas: redações de alunos do cursinho pré-vestibular da UFSCar
(Universidade Federal de São Carlos, 2009-07-03)
Modro, Marcos Vinícius
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Martins, Maria Sílvia Cintra
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https://lattes.cnpq.br/9241992645160356
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https://lattes.cnpq.br/7433211898884174
This work investigates the process of appropriation of secondary discourse genres (Bakhtin, 1992) in institutional contexts as a part of processes of social participation. Our main objective was to describe and to understand how students of the Vestibular preparatory Course (Cidade Aracy II neighborhood, in São Carlos) appropriate themselves of discursive and textual mechanisms that imply the meaning manners in the argumentative discourse genres, and as these mechanisms interconnect with the social and discursive structures, as ways of participation in the institutional literacy practices. We consider three theoretical assumptions: discourse genres studies into process of teaching/ learning of Portuguese language; the three-dimensional concept of the language of the English linguist Norman Fairclough (2001); and, the Literacy Studies. The work focuses on the access and students participation in different literacy practices and on the textual elements that they integrate into the textual production of those social contexts. The data collected through semi-structured questionnaire and the textual production of the subject of research demonstrate that the students are involved in an initial process of appropriation of the genres of the institutional sphere. We are referring to the knowledge of certain social rules and specific linguistic and discursive of the social sphere (i.e. the Vestibular exam, the University). The results of this research point to the fact that the teacher, as literacy agent, needs to focus on social activities to provide an enlargement of the students previous knowledge, besides creating opportunities so the students to participate in social reading and writing practices of the different social spheres. Thus, through the qualitative research, we intend to offer subsidies for: a) a responsive reflection concerning the school practices and the processes that involve the production of argumentative texts for the Vestibular exam; b) the understanding in the dialectic relationship among social and linguistic elements in the teaching and learning process of Portuguese language; c) the understanding of the inherent subject to the social mobility, to the social identity construction and to the practices of sense production in the speech and in the writing concerning specific social contexts.
Análises filogeográficas de Exaerete smaragdina (Guérin-Méneville, 1845) (Hymenoptera, Apidae, Euglossini) e sua hospedeira Eulaema nigrita (Lepeletier, 1841) (Hymenoptera, Apidae, Euglossini) e o status de Exaerete lepeletieri (Oliveira & Nemésio, 2003)
(Universidade Federal de São Carlos, 2009-07-07)
Silva, Otávio Lino e
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Del Lama, Marco Antonio
;
https://lattes.cnpq.br/7198095288825585
;
https://lattes.cnpq.br/6399955564656749
Rede overlay de suporte a ambientes virtuais colaborativos em redes veiculares
(Universidade Federal de São Carlos, 2009-07-13)
Meneguette, Rodolfo Ipolito
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Araujo, Regina Borges de
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https://lattes.cnpq.br/8964123297688432
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https://lattes.cnpq.br/4981889689994770
Collaborative Virtual Environments (CVEs) are synthetic 3D environments shared by multiple remotely located users with a common goal: the access to the environment through avatars (graphical representations of the user). CVEs are becoming popular on mobile devices such as handheld devices and cell phones, through games and simulations for users entertainment and comfort. These virtual environments require low latency and high scalability so that a large number of participants can interact in a consistent way without losing the immersion feeling. Therefore it entails a major concern on participants s connection strategies, especially when these environments are implemented on moving vehicles, because the unique characteristics of a vehicular ad hoc network (VANETs) like high mobility of nodes, high speed transmission and a highly dynamic topology demand a complex structure to overcome these limitations. These characteristics lead us to communication challenges among participants and to the dissemination of actions results of their avatars in the CVE and / or the state change of an object for all participants. The communication support network should be able to cope with the entrance of an increasing number of participants in the CVE without affecting these users feeling of presence. In order to overcoming the challenges of scalability and ensuring a uniform view of the virtual world for all users in VANETs networks, this paper presents a design and evaluation of an overlay network, specifically a peer-to-peer (p2p) network, which aims at providing connectivity between users of a CVE, in addition to updating the status of avatars and objects in the CVE for all participants, ensuring that information is delivered in the shortest time possible.
Mapeamento de QTL nos cromossomos 24 e 29 para medidas de peso, resistência a carrapato e estresse térmico em uma população F2 (Gir X Holandês)
(Universidade Federal de São Carlos, 2009-07-13)
Cervini, Marcelo
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Regitano, Luciana Correia de Almeida
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https://lattes.cnpq.br/6385352144935008
In the latest years, Brazil became one of the most important countries regarding the production and exportation of animal-based food. Improvements on the sanitary conditions and animal research applied to animal production were some of the elements which have placed Brazil in this highlight position. However, difficulties on controlling the tick Rhipicephalus (Boophilus) microplus and herd management limitations concerning heat stress situations hamper a greater development on the national production. A significant part of the variation on these traits is controlled by many genes (Quantitative Trait Loci - QTL). The identification of loci influencing these traits is important for genetic improvement programs. The objective of this study was to identify and map QTL for tick resistance and heat stress tolerance in the chromosomes 24 and 29, as well as QTL related to growth traits in a F2 population (Gir x Holstein) by using the microsatellites scan methodology. No QTL was identified for the tick number found. However, on chromosome 24, an indicative QTL (P<0.10) for birth weight was identified. On chromosome 29, significant QTL for sweating rate (P<0.01) and respiration frequency (P<0.05) were also recognized. In addition, a suggestive QTL (P<0.05) for standardized weaning weight was found in chromosome 29 in one of the families. These results could help to improve the knowledge about the general factors affecting the evaluated traits, making possible the development of more efficient selection strategies for the environment conditions in the Brazilian production systems.
Ordenamento ferromagnético em poli(3-hexiltiofeno) à temperatura ambiente
(Universidade Federal de São Carlos, 2009-07-14)
Paula, Fernando Rogério de
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Oliveira, Adilson Jesus Aparecido de
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https://lattes.cnpq.br/4640148190073166
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https://lattes.cnpq.br/3477304897380535
In this work we present, for the first time, a systematic study of magnetic properties of an alkyl derivative of thiophene: the poly(3-hexylthiophene) prepared in acetonitrile. This polymer was investigated in different preparation conditions, i.e., water concentration of the electrolyte solution, applied pressure in the pellets, growth and reduced potentials. The goal was the comprehension of magnetic phases in poly(3-hexylthiophene) and the development of a protocol for sample preparation. This procedure aims the control the magnetic properties. Magnetic measurements as a function of temperature and applied magnetic field performed in SQUID magnetometer show that the poly(3-hexylthiophene) exhibits a ferromagnetic phase at room temperature. Our results show that the ferromagnetic phase appears due to the exchange interaction between polaron in interchains. Experiments performed with samples stored in air and exposed at high temperature (400 K), show that the nice ferromagnetic behavior is reduced. These results discard the possibility of contamination by magnetic particles.
Uma solução baseada em agentes para redes sensores sem fios
(Universidade Federal de São Carlos, 2009-07-14)
Spadoni, Igor Marçal Botamede
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Araujo, Regina Borges de
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https://lattes.cnpq.br/8964123297688432
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https://lattes.cnpq.br/2474232792086091
Typically the current monitoring systems for physical environments subject to situations of emergency, such as industrial plants, petroliferous platforms, nuclear plants, etc., do not have the accuracy required to observe emergency events due to lack of information and/or accuracy about what is occurring in the physical environment during the event. Therefore, there is no way to know exactly where, how, and why some situations of emergency have occurred. On the other hand wireless sensor networks (WSN) are being used more and more to monitor systems of critical safety. In these systems the level of data reliability is critical, mainly when situations of emergency (events) that involve risks to life and assets occur. Therefore, it is essential to monitor incidents in an accurate way all through the event. Clearly in these environments the sensors flow of information must feed a system of continuous monitoring during the event. Besides, following up all phases of the incident may be used for future investigation and prevention by revealing the source of the problem. It may also help the rescue team, regarding managing and making decisions. The WSN present limited resources, such as communication, processing, and memory, which generate great challenges for designers of solutions for networks, such as protocols of routing and applications. In this Dissertation a routing protocol, which uses the mobile agents paradigm to perform data collecting and forwarding was designed, implemented, and evaluated. With the mobile agents there is no need for sensors to send its reading to a centralized node (sink) every time an abnormality is detected in the environment being monitored. The mobile agent designed as part of this work is personalized according to the needs of the application (for example, lower latency, higher delivery rate, etc). The agent is responsible for visiting the nodes of the WSN that have identified problems, collecting the data read and performing the fusion of the data of that region. The highlight of this work relies on the flexibility of the agent for changes of behavior that grant the service quality during the collecting and delivery of data even in diverse conditions.
Impactos da estratégia de produto no canal de distribuição : estudo multicaso sobre o relacionamento entre a indústria avícola e o varejo
(Universidade Federal de São Carlos, 2009-07-15)
Pêgo, Luíza Santos
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Silva, Andrea Lago da
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https://lattes.cnpq.br/2053931131632647
The strategy of the marketing channel can not be formulated as there was no other itens to be explored in the marketing strategy of the companies. The variable product was chosen among the other three from the marketing mix, as it is considered the activity essence of any industry. Three large areas can be highlighted as the ones more related to the marketing channel management: new product planning and development, product life-cycle and strategies related to the product management. The proposal of this work was to analyze how the interrelation between the product questions, previously quoted, and the domestic marketing channels management of the poultry industry affect their relationship with the retail link of the channel. This industry was chosen due to its importance to the national agribusiness, as a currency generator as well as to the internal market supplying. This research restricted to study the direct relationship between large companies and large retail trade operative in Brazil, not considering the wholesalers. As a research method, it was adopted the multiple case study in the poultry industry and the retail. In loco interviews were conducted with the directors of the product and marketing areas of the poultry industry and the commercial managers of the retailers. The interviews were conducted with the use of a semistructured questionnaire, validated by researchers of different areas. This research has identified that the relationship level between the poultry industry and the retail, in the three areas studied, is unsatisfactory for the involved parts. It was veriried that the new products planning an developing areas are the ones more affected by the lack of communication between the industry and the retail. In this way, the enterprises claim to more collaborative actions of their partners, in different areas, in order to begin a cooperation process between the parts. Although they pointed out this wish, both industry and retail have not shown being motivated to take any initiative in this way. This can be explained by, mainly, the market power of both actors exhibited during the final product negotiation.
Administração de cloreto de mercúrio a ratas em desenvolvimento : efeitos sobre o tecido ósseo de ratas adultas de diferentes idades
(Universidade Federal de São Carlos, 2009-07-16)
Bezerra, Juciléia Barbosa
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Nonaka, Keico Okino
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https://lattes.cnpq.br/4551036775738296
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https://lattes.cnpq.br/2275161611270650
The bone tissue is influenced by internal and external factors and heavy metals, as mercury, are examples of external or environmental factors. The mercury chloride (HgCl2) when absorbed by human body, deposits in the bone and fat tissue and dislocates bones and muscles minerals to circulation, being able to provoke illnesses. In this study, Wistar rats were divided in 4 groups: 3m, 6m, 9m and 12 months (12m) days of life. The animals were treated with HgCl2 or saline through gavage. The treatment began at 30 days of age, 5 times per week, during 60 days. The daily dose was of 0,3mg/Kg of body weight (BW) of HgCl2 and 0,1ml of saline/100g BW. After this period, the group 3m was sacrificed immediately afterwards by decapitation whereas the other groups had remained without treatment until they completed the desired age. The right femurs and vertebrae (L5) were removed for biometrics, physical and biomechanics analysis. The treatment with mercury chloride induced higher values of physical and biometric parameters in the 6m group and lower values in the 12m group and no odifications in the 3 and 9 m groups, when compared with saline treatment. Moreover, the treatment with CM promoted rats vaginal opening with 51 days of life in treated group whereas in the controls this opening occurred in 44,4 days of life.We concluded that the treatment with HgCl2, in the dose of 0,3mg/Kg BW retarded the age at the speed change of the growth of the animals, especially in 6m and 12m groups. Moreover, the HgCl2 promoted bone fragility in animals from 12m group, as can be observed by the analysis of the biometrics, physicals and biomechanics properties, in both femur and vertebrae. The treatment with CM still delayed the sexual maturity of rats.