J Appl Polym Sci 112:1587-1594, 2009″
“We consider an experimental microwave imaging system in which the targets are illuminated under various angles of incidence and the scattered field is measured on a sphere surrounding them. We estimate the map of relative permittivity of the objects from the scattered field with an iterative inversion procedure based on a conjugate gradient technique. We derive several formulations of the inversion Belinostat in vitro algorithm and analyze their efficiency on three different targets. We observe that including a priori information on the lower and upper bounds of the permittivity of

the sample leads to a spectacular improvement of the resolution of the image.”
“Polyethylene foams with different antistatic additives (Atmer 7325, Atmer 7105, and Atmer 190) were prepared by extrusion and stored during 6 months of time span in a real life environment. The antistatic performance was evaluated by measuring the surface resistivity and throughout decay-time experiments. Mechanical properties and migration tests were also performed. It was found that the migration of antistatic agents is in general low enough, which

allows to maintain the antistatic performance for periods of time larger than 6 months. The tests revealed that the desired low surface resistance and required low static decay time could be achieved with all the antistatic agents under test. Moreover, BI-2536 the additives with amina (Atmer 7105 and 7325) as an active agent showed slightly better antistatic performance than the one with the ionic agent (Atmer 190). The addition AZD2014 research buy of an antistatic agent does not significantly affect the mechanical behavior of the foam indicating a desired feature concerning industrial applications. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112:1595-1600, 2009″
“The temperature dependence of both polarization and electric-field induced strain was investigated for (1-x)Bi(Mg1/2Ti1/2)O-3-xPbTiO(3) (x=0.36, 0.37, and 0.38), with the morphotropic phase boundary located at x=0.37. Remanent

polarization (P-r) and maximum polarization (P-max) of all compositions are enhanced with increasing temperature up to 175 degrees C, which is rationalized as improved domain switching due to reduced tetragonality (c/a). The hysteresis during unipolar electric cycling tends to decrease with increase in the fraction of tetragonal phase. Temperature dependent x-ray diffraction demonstrates that switched non-180 degrees domains are stable against thermal depoling above 200 degrees C, which indicates that the currently investigated materials are suitable for high temperature applications. This promising high-T-C piezoelectric is further discussed with reference to oxygen octahedron of the tilted R3c and untilted R3m space groups and the tolerance factor (t).