DEBT, FINANCIAL FRAGILITY AND ECONOMIC GROWTH: A POST-KEYNESIAN MACROMODEL

It is developed a mathematical post-keynesian macromodel of capacity utilization and growth in which the supply of credit-money is endogenous and firms' debt position - and thus the financial fragility of the economy - is explicitly modeled. Both the influence of interest rate and indebtedness on capacity utilization and the rates of profit and growth, on the one hand, and the effect of the parameters of the saving and investment functions on financial fragility, on the other hand, are carefully analyzed.

A MACRODYNAMICS OF DEBT REGIMES, FINANCIAL INSTABILITY AND GROWTH

It is developed a dynamic macromodel of utilization and growth of productive capacity, in which the supply of credit-money is endogenous and firms' debt position - and thus the financial fragility of the economy à la Hyman Minsky - is explicitly modeled. The rate of interest is set as a markup over the base rate, which is exogenously determined by the monetary authority. Banking markup varies with changes in economic activity, which is measured by capacity utilization, while firms' debt position varies with the rates of interest, profit and capital accumulation. Regarding dynamics, it is shown the possibility of relating the stability properties of a system with the interest rate and the debt ratio as state variables to the type of minskyan regime - hedge, speculative, Ponzi - which prevails.

Response of clamped structural slabs subjected to a dynamic point load via BEM

This work computes the response of clamped slabs when subjected to spatially sinusoidal harmonic line loads via the Boundary Element Method (BEM). The formulation uses 2.5D Green's functions for the steady state response of a homogeneous three-dimensional free solid layer formation of infinite extent, proposed earlier by the authors. The inclusion of these Green's functions in the BEM formulation avoids the discretization of free horizontal surfaces, which contributes to the efficiency of the BEM model. Frequency and time responses have been computed for slabs with and without lateral confinements, for different thickness and varying spatially sinusoidal harmonic line loads.http://www.sciencedirect.com/science/article/B6V2Y-478B3WC-2/1/858485466df347cb0aab610316d65e7

Conduction and convection phenomena through a slab with thermal heterogeneities

This paper addresses the computation of the three-dimensional transient heat transfer through a layered solid and/or fluid formation containing irregular inclusions. The use of appropriate Green's functions for a flat layer formation in a boundary element method formulation avoids the discretization of the layer interface boundaries.http://www.sciencedirect.com/science/article/B6TYC-4K9C6V7-2/1/96b8b86fbaedc32af474f6ac79ac67c

ACOUSTIC INSULATION PROVIDED BY A SINGLE WALL SEPARATING TWO CONTIGUOUS TUNNELS VIA BEM

This paper describes the computation of the acoustic insulation provided by a single simple wall separating two contiguous tunnels when a steady state, spatially sinusoidal, harmonic line load pressure excites one of the tunnels. The Boundary Element Method (BEM), formulated in the frequency domain, is used to compute the acoustic pressure in the two tunnels. The insulation conferred by the wall is characterized, identifying the location of insulation dips in the frequency domain with those dips related to its own natural dynamic vibration modes and those related to the natural vibration modes of the tunnels. This model is also used to assess how the dimension of the rooms, and the rigidity and thickness of the wall affect acoustic insulation. The transmission loss results obtained via the BEM are then compared with those provided by simplified analytical models such as the mass law.http://www.sciencedirect.com/science/article/B6WM3-473FKD4-8/1/a0726723e8ba80d8c8bd662f2cddf8e