Results 91 to 100 of about 99,456 (251)
InorganicsVolumetric ceramic receivers can be regarded as a promising technology to heat air above 1000 °C for solar thermal electricity production. In this study, the thermal shock behavior of commercial 10 ppi (A) and 20 ppi (B) oxide-bonded silicon carbide (ob ...
Fernando de Almeida Costa Oliveira +4 more
doaj +1 more source
Estabelecimento do Conceito de Temperatura como uma grandeza derivada da Energia e da Entropia [PDF]
arXiv, 2002 Temperature is introduced as a derived concept from energy and entropy. We consider two sub-systems in equilibrium for several configurations. The equality of temperature of the sub-systems is obtained from the equilibrium condition. The isothermal transformation is defined for several configurations and from this definition we obtain the Clausius ...
arxiv
Energia solar no tratamento de corante têxtil
Revista Verde de Agroecologia e Desenvolvimento Sustentável, 2014 As indústrias utilizam a água em todo o seu processo, desperdiçando enormes volumes de água gerando efluentes com altos índices de produtos químicos, precisando de tratamento para ser reutilizado ou lançado no meio ambiente. Nesse contexto, o presente trabalho foi realizado no Laboratório de Engenharia Ambiental e de Qualidade na Universidade Federal ...
Silva, Viviane Farias +4 more
openaire +3 more sources
Engenharia Agrícola, 2010 A conscientização da importância do meio ambiente tem incentivado o estudo de novas fontes energéticas renováveis e menos poluentes. Dentre essas fontes, a energia solar destaca-se por ser perene e limpa.
Luiz H. Basso +4 more
doaj +1 more source
The end of the Galactic spectrum [PDF]
arXiv, 2007 We use a diffusion galactic model to analyze the end of the Galactic cosmic ray spectrum and its mixing with the extragalactic cosmic ray flux. We analyze the transition between Galactic and extragalactic components using two different extragalactic models.
arxiv
Galactic neutrino background from cosmic ray interaction with the ISM content [PDF]
arXiv, 2007 We use a diffusive model for the propagation of Galactic cosmic rays to estimate the charged pion production in interactions with protons of the interstellar medium. Cosmic ray nuclei from proton to iron are considered and the corresponding contribution to the neutrino secondary flux produced as a result of spallation is also estimated.
arxiv
A software for learning Information Theory basics with emphasis on Entropy of Spanish [PDF]
Revista Energia y Computacion, Vol. 16, No.1, June 2008, pp.58-64, 2007 In this paper, a tutorial software to learn Information Theory basics in a practical way is reported. The software, called IT-tutor-UV, makes use of a modern existing Spanish corpus for the modeling of the source. Both the source and the channel coding are also included in this educational tool as part of the learning experience.
arxiv
TRIBUTAÇÃO E BENEFÍCIOS FISCAIS DECORRENTES DA GERAÇÃO DISTRIBUÍDA DE ENERGIA SOLAR
Revista do Direito PúblicoNos dias atuais, há um enorme esforço global de incentivo às fontes alternativas de produção de energia elétrica mais sustentáveis e de menor emissão de poluentes e gases de efeito estufa, sendo, entre elas, a geração de energia solar.
Paulo Roberto dos Santos Corval +2 more
doaj +1 more source
arXiv, 2014 Quantum Chromodynamics is the most successful theory in particle physics. The understanding of all different signals at hadron colliders have been achieved due to the correct interpretation of the theory. In this paper we review some basic features of the theory of strong interactions and how it could be used in order to provide phenomenological ...
arxiv
Quark Yukawa pattern from spontaneous breaking of flavour $SU(3)^3$ [PDF]
arXiv, 2015 A $SU(3)_Q \times SU(3)_u \times SU(3)_d$ invariant scalar potential breaking spontaneously the quark flavour symmetry can explain the standard model flavour puzzle. The approximate alignment in flavour space of the vacuum expectation values of the up and down `Yukawa fields' results as a dynamical effect.
arxiv