Optical-constant calculation over an extended spectral region: application to titanium dioxide film

An iterative algorithm has been developed that takes starting values derived by an envelope method but then minimizes the influence of the envelopes and emphasizes the actual measured data. This combination avoids the difficulties inherent in the accurate drawing of the envelopes and makes it possible to extract the thickness and the optical constants of semiconducting and dielectric films over a wide spectral region, including regions of high absorption.     

Grouping error and interpersonal affect: a correction.

The writer acknowledges his in using an inflated in N in the statistical analysis of a previous study published (see 26: 3912). A reanalysis shows that the original finding that interaction induces positive feeling among group members is confirmed, although at a much lower level of significance than previously reported. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Contrôle optique du dépôt de couches multidiélectriques quart d’onde : techniques hybrides de traitement du signal utilisées pour améliorer les caractéristiques

An apparatus allowing an optical control of the deposition of quarterwave dielectric thin layers is described. This device utilizes a rapid scanning multichannel spectrometer coupled with a minicomputer; it gives, in real time, two signals respectively proportional to the two partial derivatives of the transmission factor with respect of thickness and of wavelength. By combining the effect of an analogic filtering and that of a numerical data processing, we obtain signals with extremely low noise, which permits a high precision control of quaterwave optical thickness layers by using the location of the zeros of one of the two derivatives. This allows layer stacks with a very critical control such as multicavity filters used in optical multi-demultiplexers required in telecommunications to be realized.     

A simple method for decellularizing a cell-derived matrix for bone cell cultivation and differentiation

Journal of Materials Science: Materials in Medicine - Surface modification of superparamagnetic Fe3O4 nanoparticles using polymers (polyaniline/polypyrrole) was done by radio frequency (r.f.)...     

Repeatability of the composition of titanium oxide films produced by evaporation of ti 2 o 3

Congruent vaporization is a process that yields constant vapor species. Ti(2)O(3) was continuously electron-beam evaporated to produce titanium oxide thin films. Rutherford backscattering spectrometry was employed to study the evolution of the composition of these films. It seems that congruent vaporization can be established in a coating plant. TiO(2) films produced by conventional reactive deposition tend to contain mixtures of titanium oxides. Increasing the transmission of TiO(2) films becomes an issue of increasing the TiO(2) component in the films by adequate reactive evaporation.