Low‐density polyethylene films doped with europium(III) complex: their properties and applications

Light‐converting polyethylene film containing europium(III) complex with phenanthroline was manufactured under an extrusion process. The film was characterized first by means of time‐of‐flight secondary‐ion‐mass spectrometry (TOF‐SIMS), ultraviolet‐visible‐infrared (UV‐vis‐IR) spectroscopy, then a study of excitation and luminescence spectra, quantum yield and lifetime of luminescence. The quantum yield of luminescence was measured as 5±2%, and the lifetime of luminescence was determined about 470 μsec. TOF‐SIMS surface mapping showed the uniform distribution of europium(III) over the film. Visualization of strong picosecond UV laser beams through the use of the developed film has been demonstrated. Copyright © 2004 John Wiley & Sons, Ltd.     

Correlation between electron spin resonance and superconductivity in GdxB1−xRu2 (B=Th,Ce, La)

Correlation between EPR and superconductivity in Gd_xB_1?xRu₂ (B=Th, Ce, La) enables us to interpret the behavior of the superconducting transition temperature as a function of Gd concentration in these cubic intermetallic compounds.     

Resolved ESR spectra of Gd in cubic intermetallic compounds

Resolved ESR spectra of Gd in single crystals of LaSb intermetallic compounds have been observed. A cubic crystalline field parameter, b₄ = 30 G, was extracted. The data is discussed in terms of Barnes theory for dilute alloys.     

Re-entrant critical field behavior in GdxTh1−xRu2: Correlation with EPR

The correlation between re-entrant critical field behavior and the EPR g shift enables us to estimate the conduction electron spin orbit scattering for the system Gd_xTh_1?xRu₂     

Multivariate Stochastic Orders Induced by Case-Control Sampling

It is shown that retrospective sampling induces stochastic order relations in case-control studies. More specifically if the regression function is increasing and the covariates are positively dependent, then the covariates for cases are larger, with respect to some multivariate stochastic order, than the covariates of the controls. Strong dependence concepts yield strong multivariate stochastic orders. Conversely, different multivariate stochastic orders imply different monotonicity properties on the regression function. The results carry over to marginal models, transformed models and to problems involving confounders. The results set forth a new theoretical foundation for the analysis of case-control studies.