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Search Results: 1 - 10 of 192987 matches for " Ricardo de Camargos Lopes "
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Análise da evolu o de culturas neurais
Suélen Moreira Marques,Mauro Guilherme Guzo,Ricardo de Camargos Lopes,Ariadne de Almeida Branco Oliveira
Exacta , 2012,
Abstract: This paper analyses the electrical activity recorded in an experiment involving the maturation of dissociated embryonic hippocampal cultures, using Multielectrode Array (MEA) devices, starting from the moment of the culture's placement in the device until its death, a period of 0 to 88 days in vitro (DIV). Classical "spike" analysis is applied to three different cultures, showing the progression of spikes and "bursts". Particular attention is devoted to the last step associated with cellular death, as an unexpected rise in electrical activity amplitude is observed.
Simula o do campo elétrico e magnético de um canal i nico utilizando o software FEMM
Ricardo de Camargos Lopes,Rafael Leal Lima,Vanessa Pereira Gomes,Jo?o Batista Destro Filho
Exacta , 2010,
Abstract: This work presents a simulation study of the behavior of electric and magnetic fields on calcium ion channels through a simple model. The study considers a situation of resting potential at the ion channel, involving computer simulations, using the software Finite Element Method Magnetics (FEMM), which calculates these fields by finite element technique. On these simulations we can see how these fields behave along the channels, and from that understand better its normal and pathological behavior in the future. From these simulations it was concluded that the electric field is approximately constant along the channel, with a magnitude of at about 107[volts/meter], while the electrical potential varied linearly with the height. In terms of the magnetic field, it grows exponentially in the radial direction until the end of the pore, reaching its maximum (about 4.10-9[tesla]), and decreases rapidly from this point.
Conception of language and literature: approaches
Moacir Lopes de Camargos
Via Litterae , 2009,
Abstract: The aim of this paper is to provide a discussion about the relationship between literature and language. In order to discuss this relationship, I argue that we need to consider a language and literature conception that integrates subject and language. If we separate these objects, a very common fact in schools nowadays, the use of literary language as a mere pretext to continue teaching the classical dichotomy between standard language (considered a correct model to follow) and a popular language (considered full of mistakes and needs to be constantly re-elaborated) won’t offer us an opportunity to think those objects. If we teachers continue to act this way in our own practice, we may lose the best thing literature offers to us through language: its human force (Antonio Candido, 1995).
Formation of the external jugular vein in the brown brocket deer (Mazama gouazoubira)
Gregório Corrêa Guimar?es,Matheus Camargos de Britto Rosa,Gabriela Castro Lopes,Thiago Páscoa Narciso
Biotemas , 2012,
Abstract: The brown brocket deer (Mazama gouazoubira) is a brown-greyish short-haired wild ruminant living in Central and South Americas. This paper aimed at describing the formation of the external jugular vein in a male specimen which died due to run-over. The facial and cervical regions were dissected so as to allow the visualization of the external jugular vein and its tributaries. This vein was formed by the union of the maxillary and linguofacial veins. The first originated from the superficial and transverse facial temporal veins, and it received along its length the angular vein of the eye, as well as the dorsal and lateral veins of the nose and upper lip. The second was formed after the anastomosis of the lingual and facial veins. The facial vein was originated by the union of the lower lip and deep facial veins, in the middle third of the face, rostral to the masseter muscle. This vascular arrangement differs from that usually observed in domestic ruminants, in which the transverse facial vein is underdeveloped and the facial vein receives the angular vein of the eye, the dorsal and lateral veins of the nose, besides the upper lip vein. The external jugular vein in the brown brocket deer presented the same tributaries than domestic ruminants, however, with a different vessel arrangement of the facial and facial transverse veins.
Validade discriminante do Teste de Aprendizagem Auditivo-Verbal de Rey: compara??o entre idosos normais e idosos na fase inicial da doen?a de Alzheimer
Cotta, Mariana Fonseca;Malloy-Diniz, Leandro Fernandes;Rocha, Fábio Lopes;Bicalho, Maria Aparecida Camargos;Nicolato, Rodrigo;Moraes, Edgar Nunes de;Paula, Jonas Jardim de;
Jornal Brasileiro de Psiquiatria , 2011, DOI: 10.1590/S0047-20852011000400004
Abstract: objective: this transversal study aims to evaluate the discriminant validity of the rey auditory verbal learning test (ravlt) by comparing a sample of normal elderly with a patient at the initial stage of alzheimer’s disease. methods: age and educational attainment matched patients at the initial stages of alzheimer’s disease (n = 35) and normal elderly (n = 35) were submitted to the rey auditory verbal learning test, mini mental state examination and the geriatric depression scale. the performance of the two groups was compared using the mann-whitney test at each stage of the ravlt and by roc analysis the discriminant validity of the test in both populations was evaluated. results: the group at the initial stages of alzheimer’s disease had significantly worse performance in all steps of the ravlt compared to the control group, and the steps showed good diagnostic power, with areas under the curve ranging between 0.806 and 0.989 (a1 = 0,806; a2 = 0,869; a3 = 0,958; a4 = 0,947; a5 = 0,989; a6 = 0,962; a7 = 0,985; total = 0,975; lot = 0,895; rec = 0,915). conclusion: the results suggest that the rey auditory verbal learning test is effective for discriminating normal elderly seniors from the ones in early stages of alzheimer’s disease.
Estratifica??o vertical em floresta ombrófila densa de terra firme n?o explorada, Amaz?nia Oriental
Souza, Deoclides Ricardo de;Souza, Agostinho Lopes de;
Revista árvore , 2004, DOI: 10.1590/S0100-67622004000500008
Abstract: this study was carried out at the forest management unit (fmu) in tracajás farm (02o35'53" s and 47o47'10"w), owned by nova era agroflorestal, in paragominas, pará, brazil. the objective was to accomplish the vertical stratification of an unexplored terra firme dense ombrophylous forest using cluster and discriminant analysis. the forest was stratified in homogeneous areas, denominated classes of volumetric stock i, ii and iii. in each class, five 100 x 100 m plots were randomly set up, where the total heights of the individual trees (dbh > 15.0 cm) were used for vertical forest stratification. the trees were organized in increasing order of total height and classified in 1 m amplitude classes, from the minimum to the maximum total height. a total height xmatrix was elaborated, with each variable xij representing the total height of the i-th tree classified into j-th class of total height. this x-matrix was the input for the cluster and discriminant analysis. the application of cluster analysis resulted into hierarchical and sequential clusters of height classes into total height strata (inferior, medium, and superior). discriminant analysis demonstrated a 100% correct classification. the vertical structure subdivision of forest into total height strata, by multivariate statistics proved the method efficient for uneven-aged forest vertical stratification.
Emprego do método BDq de sele??o após a explora??o florestal em Floresta Ombrófila Densa de Terra Firme, Amaz?nia oriental
Souza, Deoclides Ricardo de;Souza, Agostinho Lopes de;
Revista árvore , 2005, DOI: 10.1590/S0100-67622005000400014
Abstract: the objectives of this study were to analyze the diameter structure of a terra firme dense rain forest after selective logging, to apply the bdq method in the silvicultural treatment activities and to manage the forest aiming at a balanced diameter structure. the research was carried out at the forest management unit (fmu) in tracajás farm (02o35'53" s and 47o47'10"w), owned by nova era agroflorestal, in paragominas, pará, brazil. the forest was stratified into homogeneous areas, called classes of volume stock i, ii, and iii. in each of the stock classes, five plots of 100 x 100 m (1 ha) were randomly set up for measurement of the individuals with dbh > 15cm. in the center of each 100 x 100 m plot, a subplot of 10 x 100 m (0,1 ha) was established for measurement of the individuals with 5cm < dbh < 15 cm. the bdq selection method was used taking into account the remaining basal area (b), maximum diameter (d) and the de liocourt constant (q). in the stock class i, the proposed management method allowed the removal of 56.4 trees/ha, 3.33 m2/ha and 67.64 m3/ha, with a 13.1% reduction of the basal area. in the stock class ii, 53.7 trees/ha, 3.88 m2/ha and 65.96 m3/ha were removed, with a 16.2 % reduction of the basal area. in the stock class iii, 63.3 trees/ha, 3.13 m2/ha and 46.76 m3/ha were removed, with a 14.0% reduction of the basal area. few trees or a deficit was observed in the higher diameter classes due to the selective logging. the periodical removal of trees should occur in the lower diameter classes, aiming at a balanced diameter distribution and the conduction of the forest to a balanced structure during the cutting cycle, leading to a continuous use of the forest woody products.
Análise multivariada para estratifica??o volumétrica de uma floresta ombrófila densa de terra firme, Amaz?nia Oriental
Souza, Agostinho Lopes de;Souza, Deoclides Ricardo de;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000100007
Abstract: the objective of this study was to propose a method for stratification of an unexplored terra firme dense ombrophylous forest into classes of volumetric stocks, by using the techniques of cluster and discriminant analysis. the research was carried out at the forest management unit (fmu) in tracajás farm (02o 35'53" s and 47o 47'10"w), owned by nova era agroflorestal, in paragominas, pará, brazil. an census (100%) was accomplished in which the volumes of commercial whole-tree with dbh > 45 cm were estimated for 55 commercial species in 49 stands 10 ha each. the estimated volumes of individual commercial whole-trees were organized in a increasing order. a x-matrix was built, in which each variable xij represented the i-th volume classified in the j-th stand. this x-matrix was the input for the cluster and discriminant analysis. the application of the cluster analysis resulted in hierarchical clusters of the stands in stock classes. the analysis of the dendrogram allowed the stratification of the forest in three homogeneous and distinct groups, denominated classes of volumetric stock i, ii and iii. the discriminant analysis pointed out that 100% of the stands were correctly classified. the multivariate classification of the forest into homogeneous classes of volumetric stocks showed to be an efficient method for stratification of uneven-aged forests, which can be constituted by extracts, compartments, site classes and annual production units.
Análise multivariada para estratifica o volumétrica de uma floresta ombrófila densa de terra firme, Amaz nia Oriental
Souza Agostinho Lopes de,Souza Deoclides Ricardo de
Revista árvore , 2006,
Abstract: O objetivo deste estudo foi propor um método de estratifica o em classes homogêneas de estoque volumétrico da floresta ombrófila densa de terra firme n o explorada, empregando-se as técnicas de análises de agrupamento e discriminante. A pesquisa foi conduzida na Unidade de Manejo Florestal (UMF) da Fazenda Tracajás (02o35'53"S e 47o47'10"W), pertencente à empresa Nova Era Agroflorestal, de propriedade do Grupo Rosa Madeireira, Município de Paragominas, Estado do Pará. Foi realizado um censo (100%), no qual se estimaram os volumes do fuste comercial das árvores com dap > 45 cm de 55 espécies comerciais em 49 talh es de explora o com 10 ha cada um. Reuniram-se os volumes estimados do fuste comercial das árvores individuais por talh o em ordem crescente. Elaborou-se uma matriz X de dados desses volumes, em que cada variável x ij representou o i-ésimo volume classificado no j-ésimo talh o. A matriz X foi utilizada como input nas análises de agrupamento e discriminante. A aplica o da análise de agrupamento, método de Ward, resultou em agrupamentos hierárquicos dos talh es em classes de estoques. A análise do dendrograma permitiu estratificar o povoamento em três grupos homogêneos e distintos, denominados classes I, II e III de estoques volumétricos. A análise discriminante, método de Fisher, indicou que 100% dos talh es foram corretamente classificados. A classifica o multivariada da floresta em classes de estoques volumétricos mostrou-se um método eficiente na estratifica o de áreas homogêneas de florestas ineqüianeas, as quais podem se constituir em estratos, compartimentos, classes de sítio e unidades de produ o anual.
Dr. Marcos Pedro Canassa - *29/06/1950 ? 29/06/2005
Roso Nilson de Camargos
Revista Brasileira de Anestesiologia , 2006,
Abstract:
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