Navegação Ciências Exatas e da Terra por Título

Resultados 5909-5928 de 5972

    • W±-boson production in p–Pb collisions at √sNN = 8.16 TeV and Pb–Pb collisions at √sNN = 5.02 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; ALICE Collaboration (2023) [Artigo de periódico]
      The production of the W± bosons measured in p–Pb collisions at a centre of-mass energy per nucleon–nucleon collision √sNN = 8.16 TeV and Pb–Pb collisions at √sNN = 5.02 TeV with ALICE at the LHC is presented. The W± bosons ...

    • Weak and strong coupling theories for polarizable colloids and nanoparticles 

      Bakhshandeh, Amin; Santos, Alexandre Pereira dos; Levin, Yan (2011) [Artigo de periódico]
      A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nanoparticles. In the case of monovalent ions, we derive ...

    • Weak instability of frustated fermionic models 

      Theumann, Alba Graciela Rivas de (1997) [Artigo de periódico]
      We study the Almeida-Thouless instability of two fermionic models analogous to spin glasses that exhibit frustration and that were solved some time ago with a replica symmetric ansatz. In the first model (I) we consider ...

    • Weak lensing and spectroscopic analysis of the nearby dissociative merging galaxy cluster Abell 3376 

      Oliveira, Rogério Monteiro de; Lima Neto, Gastão Cesar Bierrenbach; Cypriano, Eduardo Serra; Machado, Rubens Eduardo Garcia; Capelato, Hugo Vicente; Laganá, Tatiana Ferraz; Durret, Florence; Bagchi, Joydeep (2017) [Artigo de periódico]
      The galaxy cluster Abell 3376 is a nearby (¯z = 0.046) dissociative merging cluster surrounded by two prominent radio relics and showing an X-ray comet-like morphology. The merger system is comprised of the subclusters ...

    • Weakly nonlinear ion-acoustic excitationsin a relativistic modelfor dense quantum plasma 

      Behery, Ebraheem Ebraheem; Haas, Fernando; Kourakis, Ioannis (2016) [Artigo de periódico]
      The dynamics of linear and nonlinear ionic-scale electrostatic excitations propagating in a magnetized relativistic quantum plasma is studied. A quantum-hydrodynamic model is adopted and degenerate statistics for the ...

    • Weakly turbulent plasma processes in the presence of inverse power-law velocity tail population 

      Ferrão, Sabrina Tigik; Petruzzellis, Larissa Teixeira; Ziebell, Luiz Fernando; Yoon, Peter H.; Gaelzer, Rudi (2017) [Artigo de periódico]
      Observations show that plasma particles in the solar wind frequently display power-law velocity distributions, which can be isotropic or anisotropic. Particularly, the velocity distribution functions of solar wind electrons ...

    • Weak solutions for the electrophoretic motion of charged particles 

      Bedin, Luciano; Thompson, Mark (2006) [Artigo de periódico]
      We introduce a weak formulation for a system of electrostatic and hydrodynamic equations modelling the electrophoretic motion of charged particles in ionized fluids. We obtain a local in time existence theorem, using the ...

    • Weak turbulence in dusty plasmas with collisional dust charging : quasilinear wave-particle interaction 

      Galvão, Renato Andrade; Ziebell, Luiz Fernando (2015) [Artigo de periódico]
      Starting from the exact microscopic equations for an unmagnetized dusty plasma, where the dust charge is regarded as a new degree of freedom of the system, we present a self-consistent set of equations that is suitable for ...

    • Weak turbulence theory for collisional plasmas 

      Yoon, Peter H.; Ziebell, Luiz Fernando; Kontar, Eduard; Schlickeiser, Reinhard (2016) [Artigo de periódico]
      Plasma is an ionized gas inwhich the collective behavior dominates over the individual particle interactions. For this reason, plasma is often treated as collisionless or collision-free. However, the discrete nature of the ...

    • Wear resistance of plasma electrolytic oxidation coatings on Ti-6Al-4V ELI alloy processed by additive manufacturing 

      Santos, Pedro Bell; Castro, Victor Velho de; Baldin, Estela Knopp Kerstner; Aguzzoli, Cesar; Longhitano, Guilherme Arthur; Munhoz, André Luiz Jardini; Lopes, Éder Sócrates Najar; Andrade, Antonio Marcos Helgueira de; Malfatti, Célia de Fraga (2022) [Artigo de periódico]
      The additive manufacturing (AM) technique can produce Ti-6Al-4V ELI (extra low interstitial) alloy for personalized biomedical devices. However, the Ti-6Al-4V ELI alloy presents poor tribological behavior. Regarding this, ...

    • Weight-balanced measures and free energy for one-dimensional dynamics 

      Lopes, Artur Oscar; Whiters, W. Douglas (1993) [Artigo de periódico]
      In this paper we consider Thermodynamic Formalism propcrties o fone dimensional maps. Wc consider the existence ofweight-balanced measures and large dcviation propcrtics o f the Frcc-Encrgy of the Jacobian of measures. We ...

    • What determines sclerobiont colonization on marine mollusk shells? 

      Agostini, Vanessa Ochi; Ritter, Matias do Nascimento; Macedo, Alexandre José; Muxagata, Erik; Erthal, Fernando (2017) [Artigo de periódico]
      Empty mollusk shells may act as colonization surfaces for sclerobionts depending on the physical, chemical, and biological attributes of the shells. However, the main factors that can affect the establishment of an organism ...

    • What drives the velocity dispersion of ionized gas in star-forming galaxies? 

      Yu, Xiaoling; Shi, Yong; Chen, Yanmei; Law, David R.; Bizyaev, D.; Bing, Longji; Li, Songlin; Zhou, Luwenjia; Chen, Jianhang; Riffel, Rogemar André; Riffel, Rogério; Zhang, Kai; Chen, Yongyun; Pan, K. (2019) [Artigo de periódico]
      We analyse the intrinsic velocity dispersion properties of 648 star-forming galaxies observed by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, to explore the relation of intrinsic gas velocity ...

    • What happened to the gas-liquid transition in the system of dipolar hard spheres? 

      Levin, Yan (1999) [Artigo de periódico]
      We explore the equilibrium properties of a system composed of dipolar hard spheres. A new theory based on the ideas derived from the work of Debye and Hückel, Bjerrum, and Onsager is proposed to explain the absence of the ...

    • White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14 

      Kepler, Souza Oliveira; Pelisoli, Ingrid Domingos; Koester, Detlev; Reindl, Nicole; Geier, Stephan; Romero, Alejandra Daniela; Ourique, Gustavo; Oliveira, Cristiane de Paula; Amaral, Larissa Antunes (2019) [Artigo de periódico]
      White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of ...

    • White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 16 

      Kepler, Souza Oliveira; Koester, Detlev; Pelisoli, Ingrid Domingos; Romero, Alejandra Daniela; Ourique, Gustavo (2021) [Artigo de periódico]
      White dwarfs are the end state of the evolution of more than 97 per cent of all stars, and therefore carry information on the structure and evolution of the Galaxy through their luminosity function and initial-to-final ...

    • White dwarf luminosity and mass functions from sloan digital sky survey spectra 

      DeGennaro, Steven; Hippel, Ted von; Winget, Donald Earl; Kepler, Souza Oliveira; Nitta, Atsuko (2008) [Artigo de periódico]
      We present the first phase in our ongoing work to use Sloan Digital Sky Survey (SDSS) data to create separate white dwarf (WD) luminosity functions (LFs) for two or more different mass ranges. In this paper, we determine ...

    • White dwarf mass distribution in the SDSS 

      Kepler, Souza Oliveira; Kleinman, Scot James; Nitta, Atsuko; Koester, Detlev; Castanheira, Bárbara Garcia; Giovannini Junior, Odilon; Costa, Alex Fabiano Murillo da; Althaus, Leandro Gabriel (2007) [Artigo de periódico]
      We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in Data Release 4 of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the ...

    • White dwarf variability with gPhoton : pulsators 

      Tucker, Michael A.; Fleming, S.W.; Pelisoli, Ingrid Domingos; Romero, Alejandra Daniela; Bell, Keaton; Kepler, Souza Oliveira; Caton, Daniel B.; Debes, John; Montgomery, Michael Houston; Thompson, S. E.; Koester, Detlev; Million, Chase; Shiao, Bernie (2018) [Artigo de periódico]
      We present results from a search for short time-scale white dwarf variability using gPhoton, a time-tagged data base of GALEX photon events and associated software package. We conducted a survey of 320 white dwarf stars ...

    • White paper on forward physics, BFKL, saturation physics and diffraction 

      Hentschinski, Martin; Silveira, Gustavo Gil da; Wallon, Samuel (2023) [Artigo de periódico]
      The goal of this white paper is to give a comprehensive overview of the rich field of forward physics. We discuss the occurrences of BFKL re-summation effects in special final states, such as Mueller–Navelet jets, jet–gap–jets, ...