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Search Results: 1 - 10 of 6690 matches for " Edson Figueiredo "
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Controle linear de máximo torque de um motor síncrono de ím?s permanentes interiores
Figueiredo, Daniel;Bim, Edson;
Sba: Controle & Automa??o Sociedade Brasileira de Automatica , 2010, DOI: 10.1590/S0103-17592010000300004
Abstract: in this article is presented the linear torque control of an interior permanent magnet synchronous motor operating in the constant torque and field weakening ranges. the constant torque control is implemented by using the maximum torque per ampère curve of the motor. the terminal stator voltage remains constant along the field weakening range by controlling the armature reaction control. in order to obtain a better dynamic response, the maximum torque per ampère control is extended up to the field weakening range, called partial field weakening region. experimental and simulation results are presented in order to validate the proposed torque control methods.
A topological pinching for the injectivity radius of a compact surface in S^3 and in H^3
Edson S. Figueiredo,Jaime Ripoll
Mathematics , 2008,
Abstract: It is given a topological pinching for the injectivity radius of a compact embedded surface either in the sphere or in the hyperbolic space
Brand equity evolution: a system dynamics model
Crescitelli, Edson;Figueiredo, Júlio Bastos;
BAR. Brazilian Administration Review , 2009, DOI: 10.1590/S1807-76922009000200003
Abstract: one of the greatest challenges in brand management lies in monitoring brand equity over time. this paper aims to present a simulation model able to represent this evolution. the model was drawn on brand equity concepts developed by aaker and joachimsthaler (2000), using the system dynamics methodology. the use of computational dynamic models aims to create new sources of information able to sensitize academics and managers alike to the dynamic implications of their brand management. as a result, an easily implementable model was generated, capable of executing continuous scenario simulations by surveying casual relations among the variables that explain brand equity. moreover, the existence of a number of system modeling tools will allow extensive application of the concepts used in this study in practical situations, both in professional and educational settings.
Brand Equity Evolution: a System Dynamics Model
Edson Crescitelli,Júlio Bastos Figueiredo
BAR. Brazilian Administration Review , 2009,
Abstract: One of the greatest challenges in brand management lies in monitoring brand equity over time. This paper aimsto present a simulation model able to represent this evolution. The model was drawn on brand equity concepts developed by Aaker and Joachimsthaler (2000), using the system dynamics methodology. The use ofcomputational dynamic models aims to create new sources of information able to sensitize academics and managers alike to the dynamic implications of their brand management. As a result, an easily implementable model was generated, capable of executing continuous scenario simulations by surveying casual relations among the variables that explain brand equity. Moreover, the existence of a number of system modeling tools will allow extensive application of the concepts used in this study in practical situations, both in professional and educational settings
Efecto Inhibidor del Extracto Acuoso de las Teliosporas Telióides del Hongo Puccinia pampeana Speg., sobre Agentes Causales de Royas
Passador, Martha Maria;Barreto Figueiredo, Mário;Furtado, Edson Luiz;
Revista mexicana de fitopatología , 2008,
Abstract: green pepper rust is caused by the fungus puccinia pampeana. since this fungus has two distinct telial forms, it is classified as a biteliomorphic rust. the first form occurs at the beginning of symptom appearance, with aecidioid, golden-yellow, catenulate teliospores surrounded by a peridium. the second one occurs at the end of the fungus cycle in the host, with dark brown, pulvinate, bicellular, pedicellate telioid teliospores, which contain germination self-inhibiting substances in their walls, that can be removed by washing. aqueous extracts were prepared with 20 mg of puccinia pampeana telioid teliospores, and tested on germination inhibition of aecidioid teliospores of the same rust and of urediniospores of coleosporium plumierae and hemileia vastratrix. the inhibiting effect was demonstrated by measuring metabasidial length (aecidioid teliospores of p. pampeana) and germ tube length of c. plumierae and h. vastratrix. the inhibiting effect was verified after 4 and 6 h of contact of spores with the extracts.
Caracteriza??o morfofisiológica de isolados do gênero Cylindrocladium
Aparecido, Christiane Ceriani;Furtado, Edson Luiz;Figueiredo, Mário Barreto;
Summa Phytopathologica , 2008, DOI: 10.1590/S0100-54052008000100008
Abstract: in order to characterize the anamorphic genus cylindrocladium eighteen isolates of this funguswere cultivated in different culture media, kept under different temperatures, besides having conidia and terminal vesicles morphologically analyzed for correct identification of the isolates. inoculations on different hosts were carried out to evaluate of pathogenic behavior of the studied isolates. concerning the morphologic characters studied, it was observed that alterations occurred in the conidial dimensions and morphology of the terminal vesicles, but was not important considering that is due to substratum changes. however, the natural variability in the general characteristics of these structures indicated that it is difficult to obtain a correct identification of the isolates. in the same culture it was observed terminal vesicles with different morphologies. pathogenic and physiological differences among the isolates could be observed. this brings the idea of distinct population groups when such characteristics are considered in this study. these differences probably indicate a distinct genetic constitution among the isolates used in this study.
Especificidade de Puccinia pampeana a cultivares de Capsicum spp. e outras solanáceas
Passador, Martha Maria;Furtado, Edson Luiz;Figueiredo, Mário Barreto;
Summa Phytopathologica , 2009, DOI: 10.1590/S0100-54052009000100012
Abstract: the capsicum spp. (pepper and green pepper) rust is caused by the fungus puccinia pampeana. this is an important disease in these crops which may cause complete losses in crops of several species of capsicum. although specific to the genus capsicum, and despite the fact that many species within this genus are susceptible to rust, some of them have shown a hypersensitivity reaction. that was the case with capsicum annuum (cayenne pepper) and c. chinense (datil pepper), which, after spermogonia formation (11 days), showed necrotic spots in the peripheral region of the spermogonia 15 days after inoculation, without evolution of the infection. a milder hypersensitivity reaction was also observed only in leaves of c. annuum (chili pepper) and c. baccatum ("chapéu-de-frade"). with regard to other solanaceous plants inoculated ("jiló" and eggplant), no symptoms or signs of infection were observed.
Vigotski e Bakhtin: a a??o educacional como projeto dialógico de produ??o de sentido
Fernandes, Júlio Flávio de Figueiredo;Carvalho, Mauro Giffoni;Campos, Edson Nascimento;
Bakhtiniana: Revista de Estudos do Discurso , 2012, DOI: 10.1590/S2176-45732012000200007
Abstract: this paper aims at establishing a dialogue between vygotsky and bakhtin, using vygotsky's concepts associated with the zone of immediate development and bakhtin's concepts related to dialogism as theoretical parameters. by using these parameters, it proposes to reflect upon the educational process through the theoretical principles or aphorisms which claim the specificity of the mediation that establishes the educator/educatee relation.
Varia??o sazonal de algumas características nutricionais e bioquímicas relacionadas com a produ??o de látex em clones de seringueira [Hevea brasiliensis (Wild.) Muell. Arg.)], em Lavras-MG
Melo, Renato Figueiredo;Oliveira, Luiz Edson Mota de;Mesquita, Alessandro Carlos;Delú Filho, Nelson;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000600015
Abstract: the objective of this work was to evaluate the effects of seasoned climatic variations on latex production, from parameters related to flux and regeneration of latex and biochemical characterization of source and sink tissues, based on the activities of neutral invertase and sucrose synthase (susy). central leaflet of mature leaves of rubber plant clones (rrim 600, fx 2261 and gt 1) collected in december 2001 and july 2002, from plants cultivated at the federal university of lavras (ufla) plant physiology section were used. production data were obtained from the same months, using the s1/2 (d2/d3) tapping system, as well as stove-dried rubber for mineral analyses. the results of production demonstrated a superiority of the rrim 600 clone, and a similar behavior of the other clones, presenting highest values in december. both enzyme activities were supain in december in all clones, and higher in baflets of the at rrim 600 clone. all clones presented superior values of total reducing and soluble sugars in december. aminoacid levels of the rrim 600 clone were statiscally superior in july and no difference was found for the other clones. total protein concentrations were higher in december in the clones rrim 600 and gt 1, and july for the clones fx 2261. dried rubber mineral analyses (n, pi, ca and mg) demonstrated reduced values in july for all evaluated characteristics. the gt 1 clone presented higher values of total nitrogen and the levels of pi, ca, and mg were superior at the drie rubber of fx 2261 clone.
Assessment of silver-stained AFLP markers for studying DNA polymorphism in proso millet (Panicum miliaceum L.)
Karam, Décio;Westra, Philip;Niessen, Scott J.;Ward, Sarah M.;Figueiredo, José Edson Fontes;
Brazilian Journal of Botany , 2006, DOI: 10.1590/S0100-84042006000400011
Abstract: proso millet (panicum miliaceum l.) is a serious weed in north america. a high number of wild proso millet biotypes are known but the genetic basis of its phenotypic variation is poorly understood. in the present study, a non-radioactive silver staining method for pcr-amplified fragment length polymorphism (aflp) was evaluated for studying genetic polymorphism in american proso millet biotypes. twelve biotypes and eight primer combinations with two/three and three/three selective nucleotides were used. pair of primers with two/three selective nucleotides produced the highest number of amplified dna fragments, while pair of primers with three/three selective nucleotides were more effective for revealing more polymorphic dna fragments. the two better primer combinations were ecor-aac/mse-ctt and ecor-act/mse-caa with seven and eleven polymorphic dna fragments, respectively. in a total of 450 amplified fragments, at least 339 appeared well separated in a silver stained acrylamide gel and 39 polymorphic dna bands were scored. the level of polymorphic dna (11.5%) using only eight pairs of primers were effective for grouping proso millet biotypes in two clusters but insufficient for separating hybrid biotypes from wild and crop. nevertheless, the present result indicates that silver stained aflp markers could be a cheap and important tool for studying genetic relationships in proso millet.
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