Multi-resolução com fóvea móvel para redução e abstração de dados em tempo real

We propose a new approach to reduction and abstraction of visual information for robotics vision applications. Basically, we propose to use a multi-resolution representation in combination with a moving fovea for reducing the amount of information from an image. We introduce the mathematical formalization of the moving fovea approach and mapping functions that help to use this model. Two indexes (resolution and cost) are proposed that can be useful to choose the proposed model variables. With this new theoretical approach, it is possible to apply several filters, to calculate disparity and to obtain motion analysis in real time (less than 33ms to process an image pair at a notebook AMD Turion Dual Core 2GHz). As the main result, most of time, the moving fovea allows the robot not to perform physical motion of its robotics devices to keep a possible region of interest visible in both images. We validate the proposed model with experimental results

Uma metodologia para redução de incertezas em sistema de medição de vazão de óleo e gás

The objective of this research is to discuss about the need for implementation of new alternatives for the implementation on the metrological control: on the findings of initial and subsequent measurements, the control procedures of measurement uncertainty applied in assessing the loss or remains found in handling operations of bulk liquids, when used turbine meters used in measuring the tax on the business of Petrobras, due to the current environment of legal metrology and scientific, both domestic and international. We aim, with these alternatives: standardizing the minimization of random and systematic errors, the estimate of the remaining errors, as well as the management control of metrological calibration procedures, control of measurement uncertainty, and contribute to the change in the form of performance of legal metrology and scientific disseminating new information to change management of metrological control, objectively focused on aspects of supervision in implementing these activities in the control of the uncertainties of measurement used in our processes in the fiscal measurement system Petrobras. Results are presented, information and comments on the influence of measurement uncertainty in the current results of the fiscal and transfer of custody. This will emphasize the need, among other things, improvement and expansion of metrological control monitored by setting a better meet demand, calibration equipment and measuring instruments for Petrobras. Finally, we intend to establish the need for improving the method of evaluation of the data meter applied to the current management control of measurement uncertainty by proposing a methodology for addressing the problem, as well as highlighting the expected results.

Obtenção de pós de Nb a partir da redução aluminotérmica com ignição por plasma

The aluminothermic reduction consists in an exothermic reaction between a metallic oxide and aluminum to produce the metal and the scum. The extracted melted metal of that reaction usually comes mixed with particles of Al2O3 resulting of the reduction, needing of subsequent refine to eliminate the residual impure as well as to eliminate porosities. Seeking to obtain a product in powder form with nanometric size or even submicrometric, the conventional heat source of the reaction aluminothermic , where a resistor is used (ignitor) as ignition source was substituted, for the plasma, that acts more efficient way in each particle of the sample. In that work it was used as metallic oxide the niobium pentoxide (Nb2O5) for the exothermal reaction Nb2O5 + Al. Amounts stoichiometric, substoichiometric and superestoichiometric of aluminum were used. The Nb2O5 powder was mixed with aluminum powder and milled in planetarium of high energy for a period of 6 hours. Those powders were immerged in plasm that acts in a punctual way in each particle, transfering heat, so that the reaction can be initiate and spread integrally for the whole volume of the particle. The mixture of Nb2O5 + Al was characterized through the particle size analysis by laser and X-ray diffraction (DRX) and the obtained product of reaction was characterized using the electronic microscopy of sweeping (MEV) and the formed phases were analyzed by DRX. Niobium powders with inferior sizes to 1 mm were obtained by that method. It is noticed, through the analysis of the obtained results, that is possible to accomplish the aluminothermic reduction process by plasma ignition with final particles with inferior sizes to the original oxide

Redução carbotérmica de TiO2 por descarga em cátodo oco

In this study we used the plasma as a source of energy in the process of carbothermic reduction of rutile ore (TiO2). The rutile and graphite powders were milled for 15 h and placed in a hollow cathode discharge produced by in order to obtain titanium carbonitride directly from the reaction, was verified the influence of processing parameters of plasma temperature and time in the synthesis of TiCN. The reaction was carried out at 600, 700 and 800˚C for 3 to 4 hours in an atmosphere of nitrogen and argon. During all reactions was monitored by plasma technique of optical emission spectroscopy (EEO) to check the active species present in the process of carbothermal reduction of TiO2. The powder obtained after the reactions were characterized by the techniques of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The technique of EEO were detected in all reactions the spectra CO and NO, and these gas-phase resulting from the reduction of TiO2. The results of X-ray diffraction confirmed the reduction, where for all conditions studied there was evidence of early reduction of TiO2 through the emergence of intermediate oxides. In the samples reduced at 600 and 700˚C, there was only the phase Ti6O11, those reduced to 800˚C appeared Ti5O9 phases, and Ti6O11 Ti7O13, confirming that the carbothermal reduction in plasma, a reduction of the ore rutile (TiO2) in a series of intermediate titanium oxide (TinO2n-1) where n varies between 5 and 10

Integração dos processos de flotação e foto-fenton para redução de óleos e graxas de água produzida em campos de petróleo

During production of oil and gas, there is also the production of an aqueous effluent called produced water. This byproduct has in its composition salts, organic compounds, gases and heavy metals. This research aimed to evaluate the integration of processes Induced Air Flotation (IAF) and photo-Fenton for reducing the Total Oils and Greases (TOG) present in produced water. Experiments were performed with synthetic wastewater prepared from the dispersion of crude oil in saline solution. The system was stirred for 25 min at 33,000 rpm and then allowed to stand for 50 min to allow free oil separation. The initial oil concentration in synthetic wastewater was 300 ppm and 35 ppm for the flotation and the photo-Fenton steps, respectively. These values of initial oil concentration were established based on average values of primary processing units in Potiguar Basin. The processes were studied individually and then the integration was performed considering the best experimental conditions found in each individual step. The separation by flotation showed high removal rate of oil with first-order kinetic behavior. The flotation kinetics was dependent on both the concentration and the hydrophilic-lipophilic balance (HLB) of the surfactant. The best result was obtained for the concentration of 4.06.10-3 mM (k = 0.7719 min-1) of surfactant EO 2, which represents 86% of reduction in TOG after 4 min. For series of surfactants evaluated, the separation efficiency was found to be improved by the use of surfactants with low HLB. Regarding the TOG reduction step by photo-Fenton, the largest oil removal reached was 84% after 45 min of reaction, using 0.44 mM and 10 mM of ferrous ions and hydrogen peroxide, respectively. The best experimental conditions encountered in the integrated process was 10 min of flotation followed by 45 min of photo-Fenton with overall TOG reduction of 99%, which represents 5 ppm of TOG in the treated effluent. The integration of processes flotation and photo-Fenton proved to be highly effective in reducing TOG of produced water in oilfields

Essa marca de suor numa canção: o processo de redução estrutural na poesia de Zila Mamede

Die Beziehung zwischen Literatur und Gesellschaft wurden, im Laufe der Jahrhunderte, aus unterschiedlichen Perspektiven analysiert. Die Wissenschaftler analysieren manchmal die Aspekten der sozialen Realität, sie betonen manchmal die Natur der literarischen Werk. Wir glauben, dass Antonio Candido einen Gleichgewichtszustand erreicht, als er das Konzept der strukturellen Reduktion oder Formalisierung entwickelt. Nämlich, der Prozess, bei dem die menschliche und soziale Leben zu einem Bestandteil der literarischen Struktur wird. Der Autor tritt eine Einbahnstraße und er kann Daten aus der sozialen Ordnung aufholen, ohne dabei die Materialität des Textes den Augen verlieren. Und das sind die theoretische Annahmen, die die Entwicklung dieser Arbeit leiten. Wir wollen zu zeigen, dass die Struktur der mamediana Lyrik aufdeckt, signifikante Daten der Gesellschaft, in der der Autore eingefügt wurde enthüllt. Folglich, wir analysieren soziale Thema, das sein Werk durchzieht. Zuerst, wir untersuchen, wie Zila Mamede den Alltag der Gesellschaft vertreten. Von der strukturellen Organisation der Gedichte, wir erkennen, das die Episode aus kleiner Städte ein Akt des Widerstands gegen die fragmentierte Profil der kapitalistischen Gesellschaf sind. Das ist, warum sie doch eng mit der Idee der Tradition erscheinen. Die dichotome Beziehung zwischen den regionalen Daten und der Element der Modernisierung etabliert, sie wird durch die Organisation des Raumes verstärkt. Während die Stadt bei konkrete gesellschaftliche Ordnung Spitzenbeträge verweist, hat die Landschaft eine harmonische und warme Form. Allgemeinen, die moderne Stadt von Zila Mamede geformt, ist eine Abbild der Industriegesellschaft. Die Bilder die Landschaft sind ein Gegenmittel gegen die Feindseligkeiten Merkmale der neuen urbanen Zustand. So, die Landschaft hat die Funktion von Umstrukturierung der Persönlichkeit des Einzelnen durch die Erfahrung der großen Städte betroffen verdinglichenden. Der Konflikt, der durch das lyrische mamediana läuft, sind Reflexionen des Prozesses der Modernisierung der Stadt Natal, ihres eigenen Landes die politische Instabilität, sie durch verschiedene staatliche Programme ging, während Der Autor seine literarische Tätigkeit verfolgt

Padrões cariotípicos em tetraodontiformes (Osteichthypes) :redução genômica e mecanismos de diversificação

The Tetraodontiformes order is composed for about 400 species of fish, distributed in ten families, with circuntropical distribution. The morphologic diversity of each family reflects in, part, the different levels of specialization. This group represents an ancestry after-Perciformes and constitutes the last branch of the diffusion of the Teleósteos, occupying a position of prominence. The phylogenetics relationships of the Tetraodontiformes exist diverse works examining and, in all, these families are recognized as groups brothers, being Diodontidae next to Tetraodontidae and Balistidae next to Monacanthidae. Although it possesss a representative number of species, the works involving of the families Balistidae and Monacanthidae are few exemplary, especially species of oceanic islands. In this work cytogenetic studies in five species had been analyzed Cantherhines macrocerus, Cantherhines pullus (Monacanthidae), Melichthys niger (Balistidae), Sphoeroides testudíneus (Tetraodontidae) and Chilomycterus antennatus (Diodontidae); through conventional coloration, Ag-NORs and C banding. Ahead of the different karyological trends of evolution presented by the Tetraodontiformes, the present work also searched to verify the relation existence enters the total size of the chromosomes with the amount of DNA in these groups of Tetraodontiformes. For such, they had been correlated the total size of the chromosomes of these species, with values of content of available DNA in literature. The cytogenetics analyses for the species C.macrocerusJ C.pullus (Monacanthidae) and M.niger (Balistidae), had disclosed 40 chromosomes, all acrocentrics. All possess only one pair of NORs and pericentromeric heterochromatin. For S.testudíneus the found dyploid number was equal 2n=46, with NF=78 (16m+18sm+8st+4a), while that for C.antennatus it possesss 2n=50, with NF=76 (4m+22st+24a). Both species possess simple NORs and pericentromeric heterochromatin blocks. In M.niger, the presence of positive marking (heterochromatin and NOR) in the secondary constriction in the second chromosomic pair suggesting the occurrence of a rearrangement, possibly a fusing involving these homologous ones, indicating that these events had been important for the establishment of the karyological history of this group. A maintenance of the chromosomic constancy found in the populations of C.macrocerus (Monacanthidae) and S.testudineus (Tetraodontidae) perhaps if must for the aiding of the gene flow through oceanic chains. These data contrast with the differentiated kinds of chromosomes of C.antennatus between the Northeast coast and Southeastern, suggesting that the ecological standards of each species, added to the conditions of the marine environment, can be responsible for the karyological delineation of each species. The found characteristics for the species C.macrocerus, C.pullus, M.niger, S.testudineus and C.antennatus add it the available data for other species of Tetraodontiformes. From the data gotten in the present study, it can be inferred that the DNA content possesss direct relation with the total length of the chromosomes

A redução de danos no atendimento especializado em álcool e outras drogas

The harm reduction HR is the official policy of Ministry of Public Health to deal with problem derived from alcohol consumption and other drugs AD. The HR refers to policies and support programs whose purpose is to reduce the risks related to the use of AD, without necessarily decrease individual consumption. This research aim was to analyze the HR conceptions and practices at two specialized institutions for AD users: 1) Psychosocial Care Center Alcohol and Drugs III (CAPSad III); 2) Therapeutic Community Fazenda da Esperança (FE) Dom Bosco. This is a qualitative research that used the following methodological tools: semi-structured interview with 21 professionals; socio demographic file and rounds of conversation with 63 participants users; participant observation and field journal. The interviews with professionals have characterized HR as a less complex and cheap treatment. At FE the HR proposal does not make part of their actions, being considered ―against the human being dignity‖. At CAPSad III is understood as an ―inevitable‖ guideline to service, once users do not remain abstinent. The users understand RD as an improvement in healthy conditions, social relations and work that occurs with the decreasing consumption of AD. They use the HR when they avoid situations that facilitate AD consumption, share relapse prevention strategies and, exclusively at CAPSad III, decrease psychotropic consumption. Stands out as an analyzer the HR comprehension as a less efficient treatment that opposes to the objective of both institutions, which is abstinence. The HR is not operationalize in daily routine by professionals and users as a healthy promotion strategy, however, the users are more affected to HR and produce strategies to face the difficulties arising from the AD consumption

Escuta clínica e atitude fenomenológica no atendimento à pessoa surda: reflexões sobre um processo psicoterápico

Psychology uses listening as a work resource. When it comes to psychotherapy, listening establishes communication and makes psychologist-client dialogue easier. This qualitative research aims to discuss the clinic listening in phenomenological attitude in existential-phenomenological psychotherapy with deaf people. This perspective is based on the thinking of German philosopher Martin Heidegger, who considers humane a being-with and being-in-the-world, always unveiling meanings. Regarding the deaf people, Libras is currently the natural language of Brazilian deaf people. In this new language configuration, communication occurs in a visual-spatial modality. Thus, listening and speech gain new dimensions, demanding different ways of understanding in the field of psychotherapy. To the development of this research, we present excerpts from therapeutic sessions narratives with a deaf client, interpreted in the light of Heidegger s hermeneutics. We consider that it is possible for the psychotherapist to listen to deaf people in phenomenological attitude. Such position, which does not naturalize and limit the humane, helps so that the clients do not feel responsible for their existence and can hermeneutically converse in their language. In this context, the psychologist must be qualified to conduct the treatment in Libras. We hope that this research can, somehow, fill the existing gap of the scientific production about such theme in the field of Psychology and, mainly, instigate discussion in the context of Psychology courses on the importance and need to qualify psychologists for the management of clinical practice with deaf people

Uma máquina de redução de grafos para serviços web

Web services are software accessible via the Internet that provide functionality to be used by applications. Today, it is natural to reuse third-party services to compose new services. This process of composition can occur in two styles, called orchestration and choreography. A choreography represents a collaboration between services which know their partners in the composition, to achieve the service s desired functionality. On the other hand, an orchestration have a central process (the orchestrator) that coordinates all application operations. Our work is placed in this latter context, by proposing an abstract model for running service orchestrations. For this purpose, a graph reduction machine will be defined for the implementation of service orchestrations specified in a variant of the PEWS composition language. Moreover, a prototype of this machine (in Java) is built as a proof of concept

Detecção e recuperação de falhas para a máquina de redução de grafos PEWS-AM

Web services are software units that allow access to one or more resources, supporting the deployment of business processes in the Web. They use well-defined interfaces, using web standard protocols, making possible the communication between entities implemented on different platforms. Due to these features, Web services can be integrated as services compositions to form more robust loose coupling applications. Web services are subject to failures, unwanted situations that may compromise the business process partially or completely. Failures can occur both in the design of compositions as in the execution of compositions. As a result, it is essential to create mechanisms to make the implementation of service compositions more robust and to treat failures. Specifically, we propose the support for fault recovery in service compositions described in PEWS language and executed on PEWS-AM, an graph reduction machine. To support recovery failure on PEWS-AM, we extend the PEWS language specification and adapted the rules of translation and reduction of graphs for this machine. These contributions were made both in the model of abstract machine as at the implementation level

Esporte como experiência estética e educativa: uma abordagem fenomenológica

O presente texto constitui-se de um recorte de uma pesquisa de doutorado realizada no programa de pós-graduação em educação da UFRN. Tem como objetivo discutir o esporte a partir da dimensão do vivido, buscando compreender os significados conferidos à prática esportiva e à experiência estética do atleta como educação. Parte de uma abordagem metodológica centrada na fenomenologia como campo de reflexão e interpretação da experiência vivida. Esse entendimento aponta caminhos para uma reflexão sobre o esporte centrada no corpo do atleta, cujos debates teóricos e as intervenções na Educação Física podem transpor qualquer concepção determinista, por uma educação móvel, sensível e inscrita no corpo em movimento