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Search Results: 1 - 10 of 18782 matches for " Bruno Franco Medeiros "
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Leituras do passado colonial e narrativas sobre o Brasil nas primeiras décadas do século XIX: a contribui o francesa
Bruno Franco Medeiros
História da Historiografia , 2010,
Abstract: Este artigo trata de alguns apontamentos sobre a tradi o historiográfica francesa nas primeiras décadas do século XIX e sua compreens o acerca dos problemas históricos originados a partir da reorganiza o do Impér io Por tuguês com a vinda da Cor te para o Brasil e poster iormente pela independência do Império do Brasil. A partir da análise de conceitos como coloniza o, revolu o e outros relacionados à experiência do tempo, pretendemos mostrar como nas primeiras décadas do século XIX esses conceitos ainda eram mobilizados em torno das características pré-modernas do conceito de história, os quais só sofreriam uma altera o significativa, no sentido de compreender a história de um ponto de vista de ruptura com uma realidade anterior, a partir da década de 1830.
Diterpenoids from Roots and Aerial Parts of the Genus Stachys
Franco Piozzi,Maurizio Bruno
Records of Natural Products , 2011,
Abstract: The occurrence of diterpenoids from roots and aerial parts of the species of the genus Stachys (Lamiaceae, Labiatae) is reviewed. The presence of these diterpenoids in other taxa and their biological properties have been also reviewed.
Diterpenoids in the Essential Oils from the Genus Stachys
Franco Piozzi,Maurizio Bruno
Records of Natural Products , 2009,
Abstract: The occurrence of diterpenoids in the essential oils of the species of the genus Stachys (Lamiaceae, Labiatae) is reviewed.
Uso de língua bovina na prática de técnicas de sutura
Franco, Diogo;Medeiros, Jo?o;Grossi, Alessandro;Franco, Talita;
Revista do Colégio Brasileiro de Cirurgi?es , 2008, DOI: 10.1590/S0100-69912008000600015
Abstract: the authors present a method of teaching of suture techniques being used instrumental surgical and bovine tongue used in the evaluation of the graduation students' learning. the evaluation of the technique, used since january 2000, considering students' motivation, learning curve, practical applicability, quality of the biological material used and similarity to the human tegument. the acceptance for the students was very good and the bovine tongue was shown material of easy acquisition and extremely useful in the teaching of suture techniques. the presented method is simple, easily reproductible and interesting. the bovine tongue is similar to the skin and the subcutaneous tissue, providing more enlightening and stimulants practical lessons.
Religiosidade e qualidade de vida em pessoas com HIV
Medeiros, Bruno;Saldanha, Ana Alayde Werba;
Estudos de Psicologia (Campinas) , 2012, DOI: 10.1590/S0103-166X2012000100006
Abstract: religiousness has been cited as an important factor in the context of living with the human immune deficiency virus/acquired immune deficiency syndrome. the aim of this study was to investigate the relationship between religiousness and quality of life in people living with human immune deficiency virus/acquired immune deficiency syndrome. so 90 patients living with hiv from a reference hospital in jo?o pessoa, in the brazilian state of paraiba, participated in this study, 56% of them being males. the world health organization quality of life assessment questionnaire-bref, four questions about religiousness from the world health organization quality of life assessment questionnaire-100 and the religious attitudes questionnaire were used. bivariate and descriptive analyses were performed as well as a multiple linear regression analysis (stepwise), that verifies which variables would best explain the quality of life in this sample. the relationship between religiousness and quality of life among the patients was demonstrated, highlighting that religiousness was related to the psychological, social and environmental domains of quality of life, which also manifested itself in similar fashion amongst symptomatic patients. the importance of religiousness in the context of health and coping with illness could be observed.
Synaptic Symmetry Increases Coherence in a Pair of Excitable Electronic Neurons
Bruno N. S. Medeiros, Mauro Copelli
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0082051
Abstract: We study how the synaptic connections in a pair of excitable electronic neurons affect the coherence of their spike trains when the neurons are submitted to noise from independent sources. The coupling is provided by electronic circuits which mimic the dynamics of chemical AMPA synapses. In particular, we show that increasing the strength of an unidirectional synapse leads to a decrease of coherence in the post-synaptic neuron. More interestingly, we show that the decrease of coherence can be reverted if we add a synapse of sufficient strength in the reverse direction. Synaptic symmetry plays an important role in this process and, under the right choice of parameters, increases the network coherence beyond the value achieved at the resonance due to noise alone in uncoupled neurons. We also show that synapses with a longer time scale sharpen the dependency of the coherence on the synaptic symmetry. The results were reproduced by numerical simulations of a pair of synaptically coupled FitzHugh-Nagumo models.
Non-Markovian effects on the dynamics of entanglement
Bruno Bellomo,Rosario Lo Franco,Giuseppe Compagno
Physics , 2008, DOI: 10.1103/PhysRevLett.99.160502
Abstract: A procedure that allows to obtain the dynamics of $N$ independent bodies each locally interacting with its own reservoir is presented. It relies on the knowledge of single body dynamics and it is valid for any form of environment noise. It is then applied to the study of non-Markovian dynamics of two independent qubits, each locally interacting with a zero temperature reservoir. It is shown that, although no interaction is present or mediated between the qubits, there is a revival of their entanglement, after a finite period of time of its complete disappearance.
Long-time Protection of Nonlocal Entanglement
Bruno Bellomo,Rosario Lo Franco,Giuseppe Compagno
Physics , 2008, DOI: 10.1166/asl.2009.1054
Abstract: We investigate how nonlocal entanglement, as identified by violations of a Bell inequality, may be protected during the evolution. Our system consists of two qubits each embedded in a bosonic reservoir evolving independently and initially in an entangled mixed state. We show that the violation of the Bell inequality can be related to the single-qubit population of excited state in such a way that, by appropriately choosing structured environments that give rise to sufficiently high values of population trapping, long-time protection of nonlocal entanglement can be correspondingly achieved.
Dynamics of Non Classically Reproducible Entanglement
Bruno Bellomo,Rosario Lo Franco,Giuseppe Compagno
Physics , 2008, DOI: 10.1103/PhysRevA.78.062309
Abstract: We investigate when the quantum correlations of a bipartite system, under the influence of environments with memory, are not reproducible with certainty by a classical local hidden variable model. To this purpose, we compare the dynamics of a Bell inequality with that of entanglement, as measured by concurrence. We find time regions when Bell inequality is not violated even in correspondence to high values of concurrence (up to $\approx 0.8$). We also suggest that these results may be observed by adopting a modification of a recent experimental optical setup. These findings indicate that even highly entangled systems cannot be exploited with certainty in contexts where the non classical reproducibility of quantum correlations is required.
Optimized experimental settings for the best detection of quantum nonlocality
Bruno Bellomo,Rosario Lo Franco,Giuseppe Compagno
Physics , 2009, DOI: 10.1016/j.physleta.2010.05.035
Abstract: Nonlocality lies at the core of quantum mechanics from both a fundamental and applicative point of view. It is typically revealed by a Bell test, that is by violation of a Bell inequality, whose success depends both on the state of the system and on parameters linked to experimental settings. This leads to find, given the state, optimized parameters for a successful test. Here we provide, for a quite general class of quantum states, the explicit expressions of these optimized parameters and point out that, for a continuous change of the state, the corresponding suitable experimental settings may unexpectedly vary discontinuously. We finally show in a paradigmatic open quantum system that this abrupt "jump" of the experimental settings may even occur during the time evolution of the system. These jumps must be taken into account in order not to compromise the correct detection of nonlocality in the system.
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