Signal Conditioning
Mostrando 25-36 de 50 artigos, teses e dissertações.
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25. Identificação e monitoramento de regime fluidodinamico em leitos fluidizados gas-solido
Power spectra obtained through Fast Fourier Transform (FTT) from time series of pressure fluctuation, showed to be an effective technique for on line monitoring of typical fluidization regimes of gas-solid bubbling columns. It was experimentally verified that the methodology permitted the identification and distinction of different contact regimes. This meth
Publicado em: 2004
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26. Sensor Hall de GaAs por implantação de ions
In this work we designed, fabricated and characterized Hall-effect magnetic sensors. We studied the involved physical principies and figures of merit of sensors (Hali voltage, Sensitivity, Offset voltage, Linearity, Noise and Temperature coefficient) and, then, we designed Hall sensors of different shapes, obtaining devices with different sensitivities. We f
Publicado em: 2000
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27. Comportamento mecanico de laranja-pera (Citrus Sinensis Osbeck)
Biological materiaIs exhibit elastic and viscoelastic properties. The knowledge of these properties is important for the design and development of equipment applied in the harvesting, processing, transportation, conditioning and selection of fruits. This work made possible the development of a device capable of measuring espherical bodies mechanical properti
Publicado em: 1993
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28. PKA Has a Critical Role in Synaptic Delivery of GluR1- and GluR4-Containing AMPARs During Initial Stages of Acquisition of In Vitro Classical Conditioning
The cyclic AMP-dependent protein kinase (PKA) signaling pathway has been shown to be important in mechanisms of synaptic plasticity, although its direct and downstream signaling effects are not well understood. Using an in vitro model of eyeblink classical conditioning, we report that PKA has a critical role in initiating a signaling cascade that results in
American Physiological Society.
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29. Calcium transients in frog skeletal muscle fibres following conditioning stimuli
1. Intracellular Ca2+ transients were recorded from frog twitch muscle fibres, using arsenazo III as a Ca2+ monitor. When fibres were stimulated by two action potentials, the arsenazo signal to the second stimulus was smaller than the first, for stimulus intervals of up to several seconds.
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30. Pavlovian Pattern Learning by Nonlinear Neural Networks
This note describes laws for the anatomy, potentials, spiking rules, and transmitters of some networks of formal neurons that enable them to learn spatial patterns by Pavlovian conditioning. Applications to spacetime pattern learning and operant conditioning are then possible, if the conditioning is viewed as multi-channel Pavlovian conditioning in a highly
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31. Olfactory fear conditioning induces field potential potentiation in rat olfactory cortex and amygdala
The widely used Pavlovian fear-conditioning paradigms used for studying the neurobiology of learning and memory have mainly used auditory cues as conditioned stimuli (CS). The present work assessed the neural network involved in olfactory fear conditioning, using olfactory bulb stimulation-induced field potential signal (EFP) as a marker of plasticity in the
Cold Spring Harbor Laboratory Press.
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32. Identification of Genes Expressed in the Amygdala During the Formation of Fear Memory
In this study we describe changes of gene expression that occur in the basolateral complex of the mouse amygdala (BLA) during the formation of fear memory. Through the combination of a behavioral training scheme with polymerase chain reaction-based expression analysis (subtractive hybridization and virtual Northern analysis) we were able to identify various
Cold Spring Harbor Laboratory Press.
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33. Interactions of cervico-ocular and vestibulo-ocular fast-phase signals in the control of eye position in rabbits.
1. Eye movements in unanaesthetized rabbits were studied during horizontal neck-proprioceptive stimulation (movement of the body with respect to the fixed head), when this stimulation was given alone and when it was given simultaneously with vestibular stimulation (rotation of the head-body). The effect of neck-proprioceptive stimulation on modifying the ant
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34. Conditioning of Parsley (Petroselinum crispum L.) Suspension Cells Increases Elicitor-Induced Incorporation of Cell Wall Phenolics.
The elicitor-induced incorporation of phenylpropanoid derivatives into the cell wall and the secretion of soluble coumarin derivatives (phytoalexins) by parsley (Petroselinum crispum L.) suspension cultures can be potentiated by pretreatment of the cultures with 2,6-dichloroisonicotinic acid or derivatives of salicylic acid. To investigate this phenomenon fu
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35. Conditional deletion of STAT5 in adult mouse hematopoietic stem cells causes loss of quiescence and permits efficient nonablative stem cell replacement
Currently, there is a major need in hematopoietic stem cell (HSC) transplantation to develop reduced-intensity regimens that do not cause DNA damage and associated toxicities and that allow a wider range of patients to receive therapy. Cytokine receptor signals through c-Kit and c-Mpl can modulate HSC quiescence and engraftment, but the intracellular signals
American Society of Hematology.
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36. Three-dimensional, Bayesian image reconstruction from sparse and noisy data sets: Near-infrared fluorescence tomography
A method for inverting measurements made on the surfaces of tissues for recovery of interior optical property maps is demonstrated for sparse near-infrared (NIR) fluorescence measurement sets on large tissue-simulating volumes with highly variable signal-to-noise ratio. A Bayesian minimum-variance reconstruction algorithm compensates for the spatial variabil
The National Academy of Sciences.