Double-slit and electromagnetic models to complete quantum mechanics

We analyze a realistic microscopic model for electronic scattering with the neutral differential delay equations of motion of point charges of the Wheeler-Feynman electrodynamics. We propose a microscopic model according to the electrodynamics of point charges, complex enough to describe the essential physics. Our microscopic model reaches a simple qualitative agreement with the experimental results as regards interference in double-slit scattering and in electronic scattering by crystals. We discuss our model in the light of existing experimental results, including a qualitative disagreement found for the double-slit experiment. We discuss an approximation for the complex neutral differential delay equations of our model using piecewise-defined (discontinuous) velocities for all charges and piecewise-constant-velocities for the scattered charge. Our approximation predicts the De Broglie wavelength as an inverse function of the incoming velocity and in the correct order of magnitude. We explain the scattering by crystals in the light of the same simplified modeling with Einstein-local interactions. We include a discussion of the qualitative properties of the neutral-delay-equations of electrodynamics to stimulate future experimental tests on the possibility to complete quantum mechanics with electromagnetic models.Comment: 4 figures, the same post-publication typos over the published version of Journal of Computational and Theoretical Nanoscience, only that these correction are not marked in red as in V7, this one is for a recollectio

Balance-of-payments constrained economic growth in Brazil

This paper applies Thirlwall’s basic balance-of-payments constraint model to Brazilian economic growth in the period 1955-98, using cointegration technique. According to Thirlwall (1979) and MacCombie and Thirlwall (1994) the dynamic Harrod foreign multiplier, that is, demand-induced economic growth, determines long-term economic growth. The results show that there is a positive cointegration between growth in exports and long-term economic growth in Brazil which conclusion supports Thirlwall’s model.Thirlwall’s model; Brazil; balance-of-payments

External debt sustainability: empirical evidence in Brazil

The purpose of this paper is to investigate the sustainability of the external debt in Brazil, or, in other words, to analyze if Brazilian economy in consideration of its external debt repayments keeps solvent. Tests show that, for different periods and using different models and variables, external debt and current account deficits are not sustainable in the long run, confirming other studies that tested sustainability of the current account and external debt in Brazil.debt sustainability; Brazil; external debt