Nonextensive Quantum H-Theorem (2009)
A proof of the quantum $H$-theorem taking into account nonextensive effects on the quantum entropy $S^Q_q$ is shown. The positiveness of the time variation of $S^Q_q$ combined with a duality...
Nonextensive effects on the phase structure of QHD (2009)
Pereira, F. I. M., Silva, R., Alcaniz, J. S.
We investigate nonextensive effects on phase transition in nuclear matter in the context Walecka many-body field theory. Changes in the general behavior are observed when the results calculated for...
A generalized equation of state for dark energy (2009)
Barboza Jr, E. M., Alcaniz, J. S., Zhu, Zong-Hong, Silva, R.
A generalized parameterization $w_\beta(z)$ for the dark energy equation of state (EoS) is proposed and some of its cosmological consequences are investigated. We show that in the limit of the...
Power-law statistics and stellar rotational velocities in the Pleiades (2009)
Carvalho, J. C., Silva, R., Nascimento, J. D. Jr. Do, De Medeiros, J. R.
In this paper we will show that, the non-gaussian statistics framework based on the Kaniadakis statistics is more appropriate to fit the observed distributions of projected rotational velocity...
Non-gaussian statistics and stellar rotational velocities of main sequence field stars (2009)
Carvalho, J. C., Nascimento, J. D. Jr. Do, Silva, R., De Medeiros, J. R.
In this letter we study the observed distributions of rotational velocity in a sample of more than 16,000 nearby F and G dwarf stars, magnitude complete and presenting high precision $Vsin i$...
Non-gaussian statistics and the relativistic nuclear equation of state (2009)
Pereira, F. I. M., Silva, R., Alcaniz, J. S.
We investigate possible effects of quantum power-law statistical mechanics on the relativistic nuclear equation of state in the context of the Walecka quantum hadrodynamics theory. By considering the...
The amyloidogenic potential and behavioral correlates of stress (2009)
Catania, C., Sotiropoulos, I., Silva, R., Onofri, C., Breen, K. C., Sousa, N., ...
Statistical post-editing of a rule-based machine translation system (2009)
Lagarda, A. L., Alabau, V., Casacuberta, Francisco, Silva, R.
Automatic post-editing (APE) systems aim at correcting the output of machine translation systems to produce better quality translations, i.e. produce translations can be manually post-edited with an...
A METHOD TO PREDICT WAVE CONDITIONS IN ISLAND ENVIRONMENT (2008)
E. Rusu, J. P. Pinto, R. Silva, C. Ventura Soares
In many ocean regions the archipelagoes or even isolated islands provide shelter and this effect has an influence
Conservative Force Fields in Non-Gaussian Statistics (2008)
Silva, J. M., Silva, R., Lima, J. A. S.
In this letter, we determine the $\kappa$-distribution function for a gas in the presence of an external field of force described by a potential U(${\bf r}$). In the case of a dilute gas, we show...
Alcaniz, J. S., Silva, R., Carvalho, F. C., Zhu, Zong-Hong
Extending previous results [Phys. Rev. Lett. 97, 081301 (2006)], we explore the cosmological implications of a new quintessence scenario driven by a slow rolling homogeneous scalar field whose...
Enhancing Microscope Biological Images with DIP Techniques (2008)
Arnaldo De, A. Araújo, Helton J. Reis, Marco Aurélio, R. Silva
Abstract. This work reports and illustrates the application of enhancement techniques to images of nervous system from a confocal microscope. These images are processed to enhance regions of...
ABSTRACT Decentralized Intrusion Detection in Wireless Sensor Networks (2008)
Ana Paula, R. Silva, Marcelo H. T, Martins Bruno, P. S. Rocha, Antonio A. F, ...
Wireless sensor networks (WSNs) have many potential applications. Furthermore, in many scenarios WSNs are of interest to adversaries and they become susceptible to some types of attacks since they...
Stress in the life of a neuron (2008)
Almeida, O. F., Yu, S., Bessa, J., Silva, R., Holsboer, F., Sousa, N.
Methodology for studying the behavior of calves in confinementduring the post-weaning phase (2007)
Silva, R., Da Silva, F., Prado, I., Carvalho, G., Franco, I., Mendes, F., ...
Twelve 60-day old, 120 kg mean initial age and weight, post-weaning Holstein calves were randomly distributed between two treatments (concentrates in meal or pellet form). The diet consisted of hay...
Nonextensive effects on the relativistic nuclear equation of state (2007)
Pereira, F. I. M., SIlva, R., Alcaniz, J. S.
The Walecka many-body field theory is investigated in the context of quantum nonextensive statistical mechanics, characterized by a dimensionless parameter $q$. We consider nuclear matter described...
CMB and LSS constraints on a single-field model of inflation (2007)
Carvalho, F. C., Alcaniz, J. S., Lima, J. A. S., Silva, R.
A new inflationary scenario whose exponential potential $V(\Phi)$ has a quadratic dependence on the field $\Phi$ in addition to the standard linear term is confronted with the tree-year observations...
Use of Computational Intelligence in Illumination Systems Searching Energetic Efficiency (2007)
Silva, I., Tostes, M. E., Silva, R.
To foment the study of methodologies to project and control efficient illumination systems, aiming at the reduction of energy consumption and optimal performance of illumination systems. Applying...
Programming effects of antenatal dexamethasone in the developing mesolimbic pathways (2007)
Leao, P., Sousa, J. C., Olieveira, M., Silva, R., Almeida, O. F. X., Sousa, N.
Lithium prevents stress-induced reduction of vascular endothelium growth factor levels (2007)
Silva, R., Martins, L., Longatto-Filho, A., Almeida, O. F. X., Sousa, N.
Use of Computational Intelligence in Illumination Systems Searching Energetic Efficiency (2007)
Silva, I., Tostes, M. E., Silva, R.
To foment the study of methodologies to project and control efficient illumination systems, aiming at the reduction of energy consumption and optimal performance of illumination systems. Applying...
We have investigated the proof of the $H$ theorem within a manifestly covariant approach by considering the relativistic statistical theory developed in [G. Kaniadakis, Phy. Rev. E {\bf 66}, 056125,...
Novel roles for integrins in tumour angiogenesis (2006)
Germain, M, Silva, R, Reynolds, L, Robinson, S, DiPersio, M, Kreidberg, J, ...
No abstract available.
Scalar-field-dominated cosmology with a transient accelerating phase (2006)
Carvalho, F. C., Alcaniz, J. S., Lima, J. A. S., Silva, R.
A new cosmological scenario driven by a slow rolling homogeneous scalar field whose exponential potential $V(\Phi)$ has a quadratic dependence on the field $\Phi$ in addition to the standard linear...
Nonextensivity in Geological Faults? (2006)
França, G. S., Vilar, C. S., Silva, R., Alcaniz, J. S.
Geological fault systems, as the San Andreas fault (SAF) in USA, constitute typical examples of self-organizing systems in nature. In this paper, we have considered some geophysical properties of the...
Sousa, L, Silva, R, Dias, C, Azevedo, L, Granja, C
No abstract available.
Constraining nonextensive statistics with plasma oscillation data (2006)
Silva, R., Alcaniz, J. S., Lima, J. A. S.
We discuss experimental constraints on the free parameter of the nonextensive kinetic theory from measurements of the thermal dispersion relation in a collisionless plasma. For electrostatic...
Relativistic statistical theory and generalized stosszahlansatz (2006)
We have investigated the proof of the $H$ theorem within a manifestly covariant approach by considering the relativistic statistical theory developed in [Phy. Rev. E {\bf 66}, 056125, 2002; {\it...
Parise,E., Cheinquer,H., Crespo,D., Meirelles,A., Martinelli,A., Sette,H., ...
Peginterferon alfa plus ribavirin is currently the treatment of choice for chronic hepatitis C. Peginterferon alfa-2a (40KD) plus ribavirin has given an overall sustained virological response of 18%...
Loh, K., Low, L., Wong, W., Zhou, S., Huang, S., Silva, R., ...
It has been well documented that oxidative stress is involved in stroke. Currently, many neuroprotective strategies have been targeted at molecules that are able to act as an oxidant to intervene...
Loh, K., Low, L., Wong, W., Zhou, S., Huang, S., Silva, R., ...
It has been well documented that oxidative stress is involved in stroke. Currently, many neuroprotective strategies have been targeted at molecules that are able to act as an oxidant to intervene...
Nonextensive models for earthquakes (2005)
Silva, R., Franca, G. S., Vilar, C. S., Alcaniz, J. S.
We have revisited the fragment-asperity interaction model recently introduced by Sotolongo-Costa and Posadas (Physical Review Letters 92, 048501, 2004) by considering a different definition for mean...
The $H$-theorem in $\kappa$-statistics: influence on the molecular chaos hypothesis (2005)
We rediscuss recent derivations of kinetic equations based on the Kaniadakis' entropy concept. Our primary objective here is to derive a kinetical version of the second law of thermodynamycs in such...
Relativity, nonextensivity, and extended power law distributions (2005)
A proof of the relativistic $H$-theorem by including nonextensive effects is given. As it happens in the nonrelativistic limit, the molecular chaos hypothesis advanced by Boltzmann does not remain...
Non-extensive statistics and the stellar polytrope index (2004)
We use physical constrains imposed from the H-Theorem and from the negative nature of the heat capacity of self-gravitating thermodynamically isolated systems to investigate some possible limits on...
Graziano, F., Arduini, F., Ruzzo, A., Mandolesi, A., Bearzi, I., Silva, R., ...
Background: Hypermethylation is studied as a new, relevant mechanism for silencing tumor suppressor genes. It is a potentially reversible epigenetic change and it is the target of novel anticancer...
Reply to ``Comment on Conservative Force Fields in Nonextensive Kinetic Theory" (2003)
Lima, J. A. S., Bezerra, J. R., Silva, R.
It is shown that the comment by Costa and Meneses [1] did not point any technical or conceptual flaw in our paper titled ``Conservative Force Fields in Nonextensive Kinetic Theory" (Physica A 316,...
Negative heat capacity and non-extensive kinetic theory (2003)
The negative nature of the heat capacity $C_V$ of thermodynamically isolated self-gravitating systems is rediscussed in the framework of a non-extensive kinetic theory. It is found that the...
Measurement of the mass difference m(D-s(+))-m(D+) at CDF II (2003)
Acosta, D., Affolder, T., Ahn, M. H., Akimoto, T., Albrow, M. G., Alcorn, B., ...
We present a measurement of the mass difference m(D-s(+))-m(D+), where both the D-s(+) and D+ are reconstructed in the phipi(+) decay channel. This measurement uses 11.6 pb(-1) of data collected by...
Measurement of the mass difference m(D-s(+))-m(D+) at CDF II (2003)
CDF Collaboration, Acosta, D, Affolder, T, Ahn, MH, Akimoto, T, Albrow, MG, ...
Conservative Force Fields in Nonextensive Kinetic Theory (2002)
Lima, J. A. S., Bezerra, J. R., Silva, R.
We investigate the nonextensive $q$-distribution function for a gas in the presence of an external field of force possessing a potential $U({\bf r})$. In the case of a dilute gas, we show that the...
Transport coefficients and nonextensive statistics (2002)
Bezerra, J. R., Silva, R., Lima, J. A. S.
We discuss the basic transport phenomena in gases and plasmas obeying the $q$-nonextensive velocity distribution (power-law). Analytical expressions for the thermal conductivity ($K_q$) and viscosity...
A Maxwellian Path to the q-Nonextensive Velocity Distribution Function (2002)
Silva, R., Plastino, A. R., Lima, J. A. S.
Maxwell's first derivation of the equilibrium distribution function for a dilute gas is generalized in the spirit of the nonextensive q-statistics proposed by Tsallis. As an application, the...
Temperature Evolution Law of Imperfect Relativistic Fluids (2002)
Silva, R., Lima, J. A. S., Calvão, M. O.
The first-order general relativistic theory of a generic dissipative (heat-conducting, viscous, particle-creating) fluid is rediscussed from a unified covariant frame-independent point of view. By...
Jeans' gravitational instability and nonextensive kinetic theory (2001)
Lima, J. A. S., Silva, R., Santos, J.
The concept of Jeans gravitational instability is rediscussed in the framework of nonextensive statistics and its associated kinetic theory. A simple analytical formula generalizing the Jeans...
Nonextensive Thermostatistics and the H-Theorem (2001)
Lima, J. A. S., Silva, R., Plastino, A. R.
The kinetic foundations of Tsallis' nonextensive thermostatistics are investigated through Boltzmann's transport equation approach. Our analysis follows from a nonextensive generalization of the...
LHCb online system technical design report: Data acquisition and experiment control (2001)
LHCb Collaboration, Barbosa-Marinho, PR, Bediaga, I, Barbosa, AF, Cernicchiaro, G, De Oliveira, EC, ...
LHCb Online system Data acquisition and experiment control : Technical design report (2001)
Bediaga, I., F. Barbosa, A., Cernicchiaro, G., Magnin, J., ...
LHCb outer tracker: Technical design report (2001)
Barbosa Marinho, P.R., Bediaga, I., Barbosa, A.F., Magnin, J., Massafferi, A., ...
LHCb muon system: Technical Design Report (2001)
Barbosa Marinho, P R., Bediaga, I., Cernicchiaro, G., Franca Barbosa, A., Magnin, J., ...
LHCb VELO (Vertex Locator): Technical Design Report (2001)
Barbosa Marinho, P R., Bediaga, I., Franca Barbosa, A., Magnin, J., Massafferri, A., ...
LHCb Online system Data acquisition and experiment control : Technical design report (2001)
Bediaga, I., F. Barbosa, A., Cernicchiaro, G., Magnin, J., ...
LHCb outer tracker: Technical design report (2001)
Barbosa Marinho, P.R., Bediaga, I., Barbosa, A.F., Magnin, J., Massafferi, A., ...
LHCb muon system: Technical Design Report (2001)
Barbosa Marinho, P R., Bediaga, I., Cernicchiaro, G., Franca Barbosa, A., Magnin, J., ...
LHCb VELO (Vertex Locator): Technical Design Report (2001)
Barbosa Marinho, P R., Bediaga, I., Franca Barbosa, A., Magnin, J., Massafferri, A., ...
Administration Managing Director: (2001)
Teknologisentret Kjoelnes Ring, Prof Sunil, R. Silva, Yngve Stentun, ...
POSTEC Newsletters are published annually and distributed free of charge to anyone who indicates an interest in receiving them. Please fill in the appropriate form on the last page of this issue if...
LHCb calorimeters : Technical Design Report (2000)
Barbosa Marinho, P R., Bediaga, I., Cernicchiaro, G., Franca Barbosa, A., Magnin, J., ...
LHCb calorimeters : Technical Design Report (2000)
Barbosa Marinho, P R., Bediaga, I., Cernicchiaro, G., Franca Barbosa, A., Magnin, J., ...
Jordan, L., Kahn, D., Morin, S., Silva, R.
The Transportation Systems Center electromagnetic scattering model was used to predict the course deviation indication (CDI) at the Dallas/Fort Worth Airport in the presence of several derogating...
A Comparison of GPS Performance in a Scintillation Environment at Ascension Island (1998)
Groves, K. M., Basu, S., Quinn, J. M., Pedersen, T. R., Falinski, K., Brown, A., ...
Post-sunset disturbances in the equatorial ionosphere routinely cause rapid phase and amplitude fluctuations (i.e., scintillation) of radio waves propagating through the disturbed regions. The...
Silva, R., Barbosa, M. A., Rondot, B., Cunha Belo, M.
Impedance and photoelectrochemical measurements were carried out with AISI 316L stainless steel and Ti-6Al-4V alloy immersed in simulated extracellular fluid with and without lactic acid additions...
Corrosion of TiN, (TiAl)N and CrN hard coatings produced by magnetron sputtering (1998)
Cunha, L., Andritschky, M., Rebouta, L., Silva, R.
Metallic components like moulds, dies and machinery can be subjected to intensive degradation during plastic transformation processes, namely when working with fibre filler materials and plastics...
Adjuvant modulation of immune responses to tuberculosis subunit vaccines.
Lindblad, E B, Elhay, M J, Silva, R, Appelberg, R, Andersen, P
Mice were immunized with experimental subunit vaccines based on secreted antigens from Mycobacterium tuberculosis in a series of adjuvants, comprising incomplete Freund's adjuvant (IFA), dimethyl...
Silva, R, Fischer, A H, Burch, J B
The major chicken vitellogenin gene (VTGII) has previously been cloned and sequenced. We now report the isolation of genomic clones that encompass a minor chicken vitellogenin gene (VTGIII) which is...
Evidence that chicken CR1 elements represent a novel family of retroposons.
We report the first precise delineation of a chicken CR1 element and show that it is flanked by a 6-base-pair target site duplication that occurred when this repetitive element transposed. The 3' end...
Adjuvant modulation of immune responses to tuberculosis subunit vaccines.
Lindblad, E B, Elhay, M J, Silva, R, Appelberg, R, Andersen, P
Mice were immunized with experimental subunit vaccines based on secreted antigens from Mycobacterium tuberculosis in a series of adjuvants, comprising incomplete Freund's adjuvant (IFA), dimethyl...
Silva, R, Fischer, A H, Burch, J B
The major chicken vitellogenin gene (VTGII) has previously been cloned and sequenced. We now report the isolation of genomic clones that encompass a minor chicken vitellogenin gene (VTGIII) which is...
Evidence that chicken CR1 elements represent a novel family of retroposons.
We report the first precise delineation of a chicken CR1 element and show that it is flanked by a 6-base-pair target site duplication that occurred when this repetitive element transposed. The 3' end...
A follow up model for patients with atrophic chronic gastritis and intestinal metaplasia
Dinis-Ribeiro, M, Lopes, C, Guilherme, M, Barbosa, J, Lomba-Viana, H, ...
Aim: To devise a follow up model for patients with gastric cancer associated lesions, such as atrophic chronic gastritis (ACG) and intestinal metaplasia (IM).
Rodrigues, C. M., Solá, S., Silva, R., Brites, D.
BACKGROUND: The pathogenesis of bilirubin encephalopathy and Alzheimer's disease appears to result from accumulation of unconjugated bilirubin (UCB) and amyloid-beta (Abeta) peptide, respectively,...
X/XYq - mosaicism and mixed gonadal dysgenesis.
Yunis, E, Silva, R, Ramirez, E, Nossa, M A
A non-fluorescent Y chromosome was observed in a phenotypic male with 45,X/46,XYq-mosaicism and mixed gonadal dysgenesis. Q-banding of the father's chromosomes showed a normally fluorescent Y....
Oyanguren, H., Silva, R., Rosenkranz, A., Isa, J.
The serum proteins and glycoproteins in 73 males were investigated with the object of deciding which tests differentiated most clearly between “pure” silicosis and silico-tuberculosis. None of...
High frequency of novel germline mutations in the VHL gene in the heterogeneous population of Brazil
Rocha, J, Silva, R, Mendonca, B, Marui, S, Simpson, A, Camargo, A
A Tcl/Tk based graphical interface to medical and administrative information.
Webster, C., Pople, A., Silva, R., Wang, X., McLinden, S.
FELIX is an front-end application processor, with an open systems back-end, that provides a uniform and intuitive interface to clinical and administrative information. It consists of an information...
H elimination and metastable lifetimes in the UV photoexcitation of diacetylene
Silva, R., Gichuhi, W. K., Huang, C., Doyle, M. B., Kislov, V. V., Mebel, A. M., ...
We present an experimental investigation of the UV photochemistry of diacetylene under collisionless conditions. The H loss channel is studied using DC slice ion imaging with two-color...
Subarachnoid haemorrhage in patients ⩾75 years: clinical course, treatment and outcome
Nieuwkamp, D J, Rinkel, G J E, Silva, R, Greebe, P, Schokking, D A, Ferro, J M
Graziano, F, Bisonni, R, Catalano, V, Silva, R, Rovidati, S, Mencarini, E, ...
Ifosfamide and cisplatin cause urinary loss of carnitine, which is a fundamental molecule for energy production in mammalian cells. We investigated whether restoration of the carnitine pool might...