Ruivo, M. C., Costa, Pedro, De Sousa, C. A., Hansen, H., Alberico, W. M.
The effects of the Polyakov loop and of a regularization procedure that allows the presence of high momentum quark states at finite temperature is investigated within the Polyakov-loop extended...
Ruivo, M. C., Costa, Pedro, Hansen, H., De Sousa, C. A.
The equation of state and the critical behavior around the critical end point are studied in the context of the Polyakov--Nambu--Jona--Lasinio model. We prove that a convenient choice of the model...
Costa, Pedro, Hansen, H., Ruivo, M. C., De Sousa, C. A.
We explore the phase diagram and the critical behavior of QCD thermodynamic quantities in the context of the so-called Polyakov--Nambu--Jona-Lasinio model. We show that this improved field...
Planning of UMTS Cellular Networks for Data Services Based on HSDPA (2009)
Diana Ladeira, Pedro Costa, Luís M. Correia, Luís Santo
Abstract — This paper addresses the planning of UMTS cellular radio networks, for data services when implementing HSDPA, enabling the evaluation of the network performance in different scenarios....
Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model (2008)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A., Hansen, H., Alberico, W. M.
The modification of mesonic observables in a hot medium is analyzed as a tool to investigate the restoration of chiral and axial symmetries in the context of the Polyakov-loop extended...
RoboCup-99 Team Descriptions Middle Robots League, Team 5dpo, pages 217–220 (2008)
This paper describes the 5dpo-2000 team. The paper will be divided into three main sections, corresponding to three main blocks: the Global Level, the Local Level and the Interface Level. These...
The QCD critical end point in the PNJL model (2008)
Costa, Pedro, De Sousa, C. A., Ruivo, M. C., Hansen, H.
We investigate the role played by the Polyakov loop in the dynamics of the chiral phase transition in the framework of the so-called PNJL model in the SU(2) sector. The results are compared with...
Thermodynamics and critical behavior in the Nambu-Jona-Lasinio model of QCD (2008)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A.
We investigate the phase diagram of strongly interacting matter as a function of temperature and baryonic density/chemical potential, within Nambu--Jona-Lasinio type models. We perform a systematic...
Phase structure, critical points and susceptibilities in Nambu-Jona-Lasinio type models (2008)
De Sousa, C. A, Costa, Pedro, Ruivo, M. C.
We investigate the chiral phase transition at finite temperature and chemical potential within SU(2) and SU(3) Nambu-Jona-Lasinio type models. The behavior of the baryon number susceptibility and the...
5dpo Team description- v2000 (2007)
Paulo Costa, António Moreira, O Sousa, Paulo Marques, Pedro Costa, Team Leader
Abstract- This paper describes the 5dpo team as it is being prepared for the competitions to be held in 2000. The main systems, vision, decision and control, and some implementation details will be...
António Moreira, Paulo Costa, Paulo Marques, Pedro Costa, Team Leader
(2) PhD. Sutdent at the FEUP, (3) Assistant Professor at the FEUP Abstract- This paper describes the 5dpo-2000 team. The paper will be divided into three main sections, corresponding to three main...
5dpo-2000 Team description (2007)
Paulo Costa, António Moreira, O Sousa, Paulo Marques, Pedro Costa, Aníbal Matos, ...
Abstract- This paper describes the 5dpo-2000 team. The paper will be divided into three main sections, corresponding to three main blocks: the Global Level, the Local Level and the Interface Level....
NetTrouble: A TTS for Network Management (2007)
Luís Santos, Pedro Costa, Paulo Simões
Abstract- Present information systems need tools that are able to register the variety of problems that occur in the system, co-ordinating the efforts of resolution and keeping the experience gained...
Effects of the Regularization on the Restoration of Chiral and Axial Symmetries (2007)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A.
The effects of a type of regularization for finite temperatures on the estoration of chiral and axial symmetries are investigated within the SU(3) Nambu-Jona-Lasinio model. The regularization...
Costa, Pedro, De Sousa, C. A., Ruivo, M. C., Kalinovsky, Yu. L.
We study the chiral phase transition at finite $T$ and $\mu_B$ within the framework of the SU(3) Nambu-Jona-Lasinio (NJL) model. The QCD critical end point (CEP) and the critical line at finite...
Behavior of physical observables in the vicinity of the QCD critical end point (2007)
Using the SU(3) Nambu-Jona-Lasinio (NJL) model, we study the chiral phase transition at finite $T$ and $\mu_B$. Special attention is given to the QCD critical end point (CEP): the study of physical...
The QCD critical end point in the SU(3) Nambu--Jona-Lasinio model (2007)
Costa, Pedro, De Sousa, C. A., Ruivo, M. C., Kalinovsky, Yu. L.
We study the chiral phase transition at finite temperature $T$ and baryonic chemical potential $\mu_B$ within the framework of the SU(3) Nambu-Jona-Lasinio (NJL) model. The QCD critical end point...
Ruivo, M. C., Costa, Pedro, De Sousa, C. A.
We investigate the possible restoration of chiral and axial symmetries across the phase transition at finite temperature and chemical potential, by analyzing the behavior of several physics...
MAID - Multi Agent for the Integration of Data. (2006)
Pedro Marques, Ricardo Correia, Pedro Costa, Ernesto Palhares, Ana Ferreira, Altamiro Da Costa Pereira
Reflexão e fundamento: sobre a relação entre gosto e conhecimento na estética de Kant (2005)
Rego, Pedro Costa
A Crítica da Faculdade do Juízo, de Kant, é primordialmente uma investigação crítica acerca de uma certa classe de juízos chamados reflexionantes, que se subdivide em dois grupos, estéticos e...
Effects of the restoration of U$_A$(1) symmetry on pseudoscalar meson observables (2005)
Ruivo, M. C., Costa, Pedro, De Sousa, C. A., Kalinovsky, Yu. L.
We investigate the restoration of chiral SU$(3)\otimes$SU$(3)$ and axial U$_A$(1) symmetries, at finite temperature and density, in the framework of the three flavor Nambu-Jona-Lasinio model with...
Durazzo,Marcelo D., Araujo,Carlos Eugenio Nabuco De, Brandão Neto,José De Souza, Potenza,André De Souza, Costa,Pedro, Takeda,Flávio, ...
PURPOSE: Description of clinical and epidemiological characteristics of patients who underwent surgery for oral cancer in a Medical School Teaching Hospital, and determination of differences with...
Costa, Pedro, Ruivo, M. C., De Sousa, C. A., Kalinovsky, Yu. L.
We explore patterns of effective restoration of the chiral U$_A$(1) symmetry using an extended three-flavor Nambu-Jona-Lasinio model that incorporates explicitly the axial anomaly through the 't...
Restoration of U$_A$(1) symmetry and meson spectrum in hot or dense matter (2005)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A., Kalinovsky, Yu. L.
We explore the effects of breaking and restoration of chiral and axial symmetries using an extended three-flavor Nambu-Jona-Lasinio model that incorporates explicitly the axial anomaly through the 't...
Phase transitions and behavior of kaons in hot and dense matter (2004)
De Sousa, C. A., Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
We study phase transitions and the behavior of kaons in hot and dense matter, giving special attention to the role of strange quarks. At T=0, it is found that the fraction of the strange valence...
Is the U$_A$(1) symmetry restored at finite temperature or density? (2004)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A., Kalinovsky, Yu. L.
We investigate the full U(3)$\otimes$U(3) chiral symmetry restoration, at finite temperature and density, on the basis of the three flavor Nambu-Jona-Lasinio model with the anomaly term given by the...
Effective restoration of chiral and axial symmetries at finite temperature and density (2004)
Ruivo, M. C., Costa, Pedro, De Sousa, C. A., Kalinovsky, Yu. L.
The effective restoration of chiral and axial symmetries is investigated within the framework of the SU(3) Nambu-Jona-Lasinio model. The topological susceptibility, modeled from lattice data at...
Two photon decay of $\pi^0$ and $\eta$ at finite temperature and density (2004)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
A comparative study of the anomalous decays $\pi^0, \eta \to\gamma\gamma$, at finite temperature and at finite density, is performed in the framework of the three--flavor Nambu--Jona-Lasinio. The...
Effective restoration of the U_A(1) symmetry with temperature and density (2004)
Costa, Pedro, Ruivo, M. C., De Sousa, C. A., Kalinovsky, Yu. L.
We investigate the full U(3)$\otimes$U(3) chiral symmetry restoration, at finite temperature and density, on the basis of a quark model which incorporates the most relevant properties of QCD in this...
Anomalous decay of pion and eta at finite temperature (2004)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
We study the anomalous decays $\pi^0, \eta \to\gamma\gamma$ in the framework of the three--flavor Nambu--Jona-Lasinio [NJL] model at finite temperature. The similarities and differences between these...
Charged pions and kaons weak leptonic decays at finite density (2004)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
The weak leptonic decays $\pi^\pm\to\mu^\pm\nu_{\mu}(\bar{\nu}_{\mu}), \pi^\pm\to e^\pm\nu_e(\bar{\nu}_{e}), K^\pm\to\mu^\pm\nu_{\mu}(\bar{\nu}_{\mu})$ and $K^\pm\to e^\pm \nu_e(\bar{\nu}_{e})$ are...
G9 - Impacto ambiental das grandes obras- Venda Nova II (2004)
Araújo, Catarina, Silva, Erick, Silva, Fernando, Branco, Katharina, Nogueira, Luís, Fernandes, Nilton, ...
Relatório de uma visita de estudo efectuada em 30 de Outubro de 2004 pelos alunos do 1º ano de Eng. Civil da U.M.
Anomalous decay of pion and eta at finite density (2003)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
We study the anomalous decays $\pi^0, \eta \to\gamma\gamma$ in the framework of the three--flavor Nambu--Jona-Lasinio [NJL] model, in the vacuum and in quark matter in $\beta$ --equilibrium. It is...
$\eta - \eta'$ in a hot and dense medium (2003)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
The behavior of $\eta$ and $\eta'$ in hot strange quark matter in weak equilibrium with temperature, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] model. Possible manifestations of...
Pseudoscalars Mesons in Hot, Dense Matter (2003)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L., De Sousa, C. A.
Phase transitions in hot and dense matter and the in--medium behavior of pseudoscalar mesons ($\pi^{\pm}, \pi^0, K^{\pm}, K^0 ,\bar K^0,\eta {and} \eta' $) are investigated, in the framework of the...
Pseudoscalar neutral mesons in hot and dense matter (2002)
Costa, Pedro, Ruivo, M. C., Kalinovsky, Yu. L.
The behavior of neutral pseudoscalar mesons $\pi^0, \eta$ and $\eta'$ in hot and dense matter is investigated, in the framework of the three flavor Nambu-Jona-Lasinio model. Three different scenarios...
The cultural activities cluster in Portugal: trends and perspectives (2002)
Este artigo pretende avaliar de forma muito sintética a importância das actividades culturais na economia portuguesa, identificando as principais tendências e oportunidades para este cluster na...
Kaons and pions in strange quark matter (2001)
The behavior of kaons and pions in strange quark matter in weak equilibrium, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] model. This work focuses a region of high densities where the...
Efeito de "meio" e desenvolvimento urbano: o caso da fileira da cultura (1999)
Efectua-se neste texto uma breve análise do papel do "ambiente" urbano-metropolitano no surgimento e desenvolvimento das actividades da fileira da cultura, as quais assumem actualmente uma...
Paulo Costa, António Moreira, O Sousa, Paulo Marques, Pedro Costa, Aníbal Matos, ...
Abstract- This paper describes the 5dpo team. The paper will be divided into three main sections, corresponding to three main blocks: the Global Level, the Local Level and the Interface Level. These...
Paulo Costa, Antonio Moreira, O Sousa, Paulo Marques, Pedro Costa, Anibal Matos
Abstract. This paper describes the 5dpo team. The paper will be divided into three main sections, corresponding to three main blocks: the Global Level, the Local Level and the Interface Level. These...
De cómo los turcos descubrierón América : novela corta / Jorge Amado (1994)
Amado, Jorge, 1912-, Costa, Pedro
Traducción de: A descoberta da América pelos Turcos