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Estudo da estrutura de custos e da economia de escala do setor de telecomunicações móveis do Brasil pós-privatizações
(Universidade do Vale do Rio do Sinos, 2007-03-30)
The telecommunication sector has been through significant structural transformations, technological innovations and changes in the regulatory processes, worldwide over the last decades. In Brazil, the mobile telephony, ...
Volumetric properties of binary mixtures of (water + organic solvents) at temperatures between T = 288.15 K and T = 303.15 K at p = 0.1 MPa
(2006)
In this work, densities of binary mixtures of {water + formamide (FM), or + N,N-dimethylformamide (DMF), or + dimethylsulfoxide (DMSO), or + N,N-dimethylacetamide (DMA), or + 1,4-dioxane}, have been determined under ...
Thermodynamic and spectroscopic study of binary mixtures containing {dimethyl carbonate (DMC) + alcohols} at T = (288.15–308.15) K and p = (0.1–40) MPa: Experimental study and modelling
(2019)
© 2019 Elsevier LtdThe current paper presents experimental measurements of density, ρ, for binary liquid mixtures containing {dimethyl carbonate (DMC) + methanol, or + ethanol, or + 1-propanol)} over the whole composition ...
Thermodynamic properties of binary mixtures of n-butylammonium-based ionic liquids with ethanol at T = (293.15–313.15) K
(2019)
© 2018, Akadémiai Kiadó, Budapest, Hungary. In this study, density, speed of sound and viscosity of binary mixtures of ionic liquids + ethanol have been measured as a function of composition at T = (293.15–313.15) K and ...
Probing negative-dimensional integration: Two-loop covariant vertex and one-loop light-cone integrals
(1999-01-04)
The negative-dimensional integration method (NDIM) seems to be a very promising technique for evaluating massless and/or massive Feynman diagrams. It is unique in the sense that the method gives solutions in different ...
Análogos del décimo problema de Hilbert = Analogues of hilbert's tenth problem.
(Universidad de Concepción, Facultad de Ciencias Físicas y Matemáticas, Departamento de Matemática., 2010)
The tenth problem in D. Hilbert's famous list asked the following :
Devise an algorithm to decide whether a polynomial equation
with integer coe cients has an integer solution.
(These equations are called Diophantine ...
Desarrollo de una interfaz gráfica de usuario para el cálculo de parámetros micro-mecánicos en materiales compuestos reforzados con fibra corta
(2019-03)
This project present the development of a graphical interface composed by: Mathematical model of the interfacial shear strength in short-fibre composites, polynomial regression for stress-strain values and image processing. ...
A more general theory of static approximations for conjunctive queries
(Schloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing, 2018)
Conjunctive query (CQ) evaluation is NP-complete, but becomes tractable for fragments of bounded hypertreewidth. Approximating a hard CQ by a query from such a fragment can thus allow for an efficient approximate evaluation. ...
A Metric Index for Approximate String Matching
(Elsevier, 2006)
We present a radically new indexing approach for approximate string matching.
The scheme uses the metric properties of the edit distance and can be applied to
any other metric between strings. We build a metric space ...
Efficient approximations of conjunctive queries
(Society for Industrial and Applied Mathematics, 2014)
When finding exact answers to a query over a large database is infeasible, it is natural
to approximate the query by a more efficient one that comes from a class with good bounds on the
complexity of query evaluation. ...