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Search Results: 1 - 10 of 189872 matches for " G. Fiorillo "
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Claro Enigma:o discurso da Obscuridade
Marilia Fiorillo
Galáxia , 2012,
Abstract: Contrariando o molde clssico, o intenso poder comunicativo da primeira retrica crist repousa no paradoxo, no exagero e na ambivalncia. A retrica crist nasceu no da simplicidade dos lrios dos campos, mas de uma exortao ao assombro e ao enigma como pathos das boas-novas. Neste ensaio, analisamos em mincia esta caracterstica, numa passagem (perikope) do mais antigo evangelho de que se tem conhecimento, o Evangelho de Tom.
Apontamentos sobre o Enigma Gnóstico
Marilia Fiorillo
REVER : Revista de Estudos da Religi?o , 2008,
Abstract: Since the publication of The Nag Hammadi Library (NHL) in the late 1970s, there has been an increased interest in academic studies on Gnosticism, especially the Christian variant. This article, based on the theoretical approaches of Hans Jonas and E. R. Dodds, addresses the Gnostic vision of Creation, as well as the unique and exaggerated rhetoric to which the Gnostic imagination must resort in order to shape its excessive syncretism.
Comment on "Compositional and Microchemical Evidence of Piezonuclear Fission Reactions in Rock Specimens Subjected to Compression Tests" [Strain 47 (Suppl. 2), 282 (2011)]
G. Amato,G. Bertotti,O. Bottauscio,G. Crotti,F. Fiorillo,G. Mana,M. L. Rastello,P. Tavella,F. Vinai
Physics , 2012,
Abstract: It is shown that the chemical composition data published by Carpinteri et al. in the article "Compositional and Microchemical Evidence of Piezonuclear Fission Reactions in Rock Specimens Subjected to Compression Tests" [Strain 47 (Suppl. 2), 282 (2011)] cannot be the result of independent measurements as claimed by the authors. Therefore, no conclusion can be drawn from them about compositional modifications induced in the stone by hypothetical piezonuclear reactions taking place during catastrophic failure of the material at fracture.
Performance of a SensL-30035-16P Silicon Photomultiplier array at liquid argon temperature
S. Catalanotti,A. G. Cocco,G. Covone,M. D Incecco,G. Fiorillo,G. Korga,B. Rossi,S. Walker
Physics , 2015,
Abstract: Next generation multi-ton scale noble liquid experiments have the unique opportunity to discover dark matter particles at the TeV scale, reaching the sensitivity of 10^-48 cm2 in the WIMP nucleon scattering cross-section. A prerequisite will be the reduction of radiogenic background sources to negligible levels. This is only possible if ultra pure high efficiency photosensors are available for the scintillation light readout. Current experiments (e.g. Xenon, LUX, Darkside, ArDM) use cryogenic PMTs as photosensors. An attractive alternative is represented by silicon photomultiplier arrays (SiPM arrays), which show unrivalled performances in single photon detection. This paper reports on the performance of the SensL-30035-16P SiPM array and a custom made cryogenic front-end board at the liquid argon temperature.
Towards a General Theory of Neural Computation Based on Prediction by Single Neurons
Christopher D. Fiorillo
PLOS ONE , 2008, DOI: 10.1371/journal.pone.0003298
Abstract: Although there has been tremendous progress in understanding the mechanics of the nervous system, there has not been a general theory of its computational function. Here I present a theory that relates the established biophysical properties of single generic neurons to principles of Bayesian probability theory, reinforcement learning and efficient coding. I suggest that this theory addresses the general computational problem facing the nervous system. Each neuron is proposed to mirror the function of the whole system in learning to predict aspects of the world related to future reward. According to the model, a typical neuron receives current information about the state of the world from a subset of its excitatory synaptic inputs, and prior information from its other inputs. Prior information would be contributed by synaptic inputs representing distinct regions of space, and by different types of non-synaptic, voltage-regulated channels representing distinct periods of the past. The neuron's membrane voltage is proposed to signal the difference between current and prior information (“prediction error” or “surprise”). A neuron would apply a Hebbian plasticity rule to select those excitatory inputs that are the most closely correlated with reward but are the least predictable, since unpredictable inputs provide the neuron with the most “new” information about future reward. To minimize the error in its predictions and to respond only when excitation is “new and surprising,” the neuron selects amongst its prior information sources through an anti-Hebbian rule. The unique inputs of a mature neuron would therefore result from learning about spatial and temporal patterns in its local environment, and by extension, the external world. Thus the theory describes how the structure of the mature nervous system could reflect the structure of the external world, and how the complexity and intelligence of the system might develop from a population of undifferentiated neurons, each implementing similar learning algorithms.
Beyond Bayes: On the Need for a Unified and Jaynesian Definition of Probability and Information within Neuroscience
Christopher D. Fiorillo
Information , 2012, DOI: 10.3390/info3020175
Abstract: It has been proposed that the general function of the brain is inference, which corresponds quantitatively to the minimization of uncertainty (or the maximization of information). However, there has been a lack of clarity about exactly what this means. Efforts to quantify information have been in agreement that it depends on probabilities (through Shannon entropy), but there has long been a dispute about the definition of probabilities themselves. The “frequentist” view is that probabilities are (or can be) essentially equivalent to frequencies, and that they are therefore properties of a physical system, independent of any observer of the system. E.T. Jaynes developed the alternate “Bayesian” definition, in which probabilities are always conditional on a state of knowledge through the rules of logic, as expressed in the maximum entropy principle. In doing so, Jaynes and others provided the objective means for deriving probabilities, as well as a unified account of information and logic (knowledge and reason). However, neuroscience literature virtually never specifies any definition of probability, nor does it acknowledge any dispute concerning the definition. Although there has recently been tremendous interest in Bayesian approaches to the brain, even in the Bayesian literature it is common to find probabilities that are purported to come directly and unconditionally from frequencies. As a result, scientists have mistakenly attributed their own information to the neural systems they study. Here I argue that the adoption of a strictly Jaynesian approach will prevent such errors and will provide us with the philosophical and mathematical framework that is needed to understand the general function of the brain. Accordingly, our challenge becomes the identification of the biophysical basis of Jaynesian information and logic. I begin to address this issue by suggesting how we might identify a probability distribution over states of one physical system (an “object”) conditional only on the biophysical state of another physical system (an “observer”). The primary purpose in doing so is not to characterize information and inference in exquisite, quantitative detail, but to be as clear and precise as possible about what it means to perform inference and how the biophysics of the brain could achieve this goal.
Mulheres que foram reis
Marilia Pacheco Fiorillo
Pro-Posi??es , 2008, DOI: 10.1590/s0103-73072008000100009
Structural social capital and health in Italy
Damiano Fiorillo,Fabio Sabatini
Quantitative Finance , 2014,
Abstract: This paper presents the first empirical assessment of the causal relationship between social capital and health in Italy. The analysis draws on the 2000 wave of the Multipurpose Survey on Household conducted by the Italian Institute of Statistics on a representative sample of the population (n = 46,868). Our measure of social capital is the frequency of meetings with friends. Based on IV and bivariate probit estimates, we find that individuals who meet friends every day or at least two times a week are approximately 11% to 16% more likely to report good health.
A new generation photodetector for astroparticle physics: the VSiPMT
G. Barbarino,F. C. T. Barbato,L. Campajola,F. Canfora,R. de Asmundis,G. De Rosa,G. Fiorillo,P. Migliozzi,C. M. Mollo,B. Rossi,D. Vivolo
Physics , 2014, DOI: 10.1016/j.astropartphys.2015.01.003
Abstract: The VSiPMT (Vacuum Silicon PhotoMultiplier Tube) is an innovative design we proposed for a revolutionary photon detector. The main idea is to replace the classical dynode chain of a PMT with a SiPM (G-APD), the latter acting as an electron detector and amplifier. The aim is to match the large sensitive area of a photocathode with the performance of the SiPM technology. The VSiPMT has many attractive features. In particular, a low power consumption and an excellent photon counting capability. To prove the feasibility of the idea we first tested the performance of a special non-windowed SiPM by Hamamatsu (MPPC) as electron detector and current amplifier. Thanks to this result Hamamatsu realized two VSiPMT industrial prototypes. In this work, we present the results of a full characterization of the VSiPMT prototype.
Retrospective and observational study to assess the efficacy of citicoline in elderly patients suffering from stupor related to complex geriatric syndrome
Putignano S, Gareri P, Castagna A, Cerqua G, Cervera P, Cotroneo AM, Fiorillo F, Grella R, Lacava R, Maddonni A, Marino S, Pluderi A, Putignano D, Rocca F
Clinical Interventions in Aging , 2012, DOI: http://dx.doi.org/10.2147/CIA.S29366
Abstract: rospective and observational study to assess the efficacy of citicoline in elderly patients suffering from stupor related to complex geriatric syndrome Original Research (3195) Total Article Views Authors: Putignano S, Gareri P, Castagna A, Cerqua G, Cervera P, Cotroneo AM, Fiorillo F, Grella R, Lacava R, Maddonni A, Marino S, Pluderi A, Putignano D, Rocca F Published Date May 2012 Volume 2012:7 Pages 113 - 118 DOI: http://dx.doi.org/10.2147/CIA.S29366 Received: 21 December 2011 Accepted: 06 February 2012 Published: 23 May 2012 Salvatore Putignano, Pietro Gareri, Alberto Castagna, Giuliano Cerqua, Pasquale Cervera, Antonino Maria Cotroneo, Francesco Fiorillo, Roberto Grella, Roberto Lacava, Antonio Maddonni, Saverio Marino, Alice Pluderi, Daria Putignano, Filomena Rocca Associazione Geriatri Extraospedalieri – Geriatria Italiana Territoriale, Tenore 17, Naples, Italy Abstract: A significant percentage of elderly subjects (50%–80%) suffering from sub-acute ischemic cerebrovascular disease, with or without moderate or severe cognitive memory decline and with or without associated behavioral and psychological symptoms, shows a complex syndrome. This syndrome is related to the progressive impairment of health conditions and/or stressing events (ie, hospitalization), characterized by confusion and/or stupor, which are consequently difficult to manage and require a great deal of care. Geriatric patients often suffer from multiple chronic illnesses, may take numerous medications daily, exhibit clinical instability, and may experience worsening of medical conditions following cerebral ischemic events and thus have an increased risk of disability and mortality. There are several studies in literature which demonstrate the efficacy of citicoline, thanks to its neuroprotective function, for the recovery and in postischemic cerebral rehabilitation. It has been shown that, even soon after an ischemic stroke, administration of oral citicoline (500–4000 mg/day) improves the general conditions evaluated with the Rankin scale and the National Institute of Health Stroke Scale 12. In particular, it has been shown that the CDP-choline improves the cognitive and mental performance in Alzheimer's dementia and vascular dementia. We have evaluated the administration of citicoline in geriatric patients following a protocol of intravenous study on improvement of individual performances.
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