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- Instituto Superior TécnicoPT34 papers
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8 papers · 1 filter
TiN Films Deposited by Laser CVD: A Growth Kinetics Study
A. J. Silvestre, O. Conde
Results on the chemical composition, structure and growth kinetics of titanium nitride (TiN) films deposited on mild steel substrates by pyrolytic laser-induced chemical vapour dep…
Influence of Carbon Content on the Crystallographic Structure of Boron Carbide Films
O. Conde, A. J. Silvestre, J. C. Oliveira
Boron carbide thin films were synthesised by laser-assisted chemical vapour deposition (LCVD), using a CO2 laser beam and boron trichloride and methane as precursors. Boron and car…
Laser-Assisted Deposition of r-B4C Coatings Using Ethylene as Carbon Precursor
M. J. Santos, A. J. Silvestre, O. Conde
Rhombohedral B4C coatings were synthesised on fused silica substrates by CO2 laser-assisted chemical vapour deposition (LCVD), using a dynamic reactive atmosphere of BCl3, C2H4 and…
Sally modules and associated graded rings
Alberto Corso, Claudia Polini, Maria Vaz Pinto
We study the depth properties of the associated graded ring of an m-primary ideal I in terms of numerical data attached to the ideal I. We also find bounds on the Hilbert coefficie…
Integrability of Poisson brackets
Marius Crainic, Rui Loja Fernandes
We show that various notions of integrability for Poisson brackets are all equivalent, and we give the precise obstructions to integrating Poisson manifolds. We describe the integr…
Leptogenesis in a prompt decay scenario
Luis Bento
Leptogenesis is studied within the seesaw neutrino mass model in a regime where all sterile neutrinos have prompt rather than delayed decays. It is shown that during neutrino therm…