This article examines the determinants of private investment in Brazil from sectorial industry data for the period of 1996 to 2010. The series of gross fixed capital formation, commonly used in empirical studies of aggregate investment, eliminates irregular adjustments of individual production units due to the aggregation process. Using the industry’s sectorial data it is possible to avoid smoo...

We consider a signal restoration from observations corrupted by random noise. The local maximum likelihood technique allows to deal with quite general statistical models of signal dependent observations, relaxes the standard parametric modelling of the standard maximum likelihood, and results in ßexible nonparametric regression estimation of the signal. We deal with the anisotropy of the signal...

We develop a very general operator-valued functional calculus for operators with an H∞−calculus.We then apply this to the joint functional calculus of two sectorial operators when one has an H∞calculus. Using this we prove theorem of Dore-Venni type on sums of sectorial operators and apply our results to the problem of Lp−maximal regularity. Our main assumption is the R-boundedness of certain s...

We report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. The face angle between these interfaces has a strong impact on the threshold of soliton excitation as well as on the light energy drift and diffraction spreading.

Capacity utilization rate is one of the most important indicators of the efficiency of the manufacturing industry, and therefore of the return of the investments made. Estimation of these rates accurately renders it possible to make important economic decisions such as taking sectorial investment decisions, defining the optimal distribution of sectorial credits, determining noncompetitive secto...

Phased array ultrasonic testing technology is of flexible, reliable, efficient and suitable for special equipment welds non-destructive testing. Sectorial scan angle range was investigated in this paper for phased array ultrasonic oblique incident pulse shear wave testing of special equipment welds made in low carbon steel. The theoretical calculation of ultrasound wave energy transmission coef...