Size quantization effects in thin film Casimir interaction

We investigate the role of size quantization in the vacuum force between metallic films of nanometric thickness. The force is calculated by the Lifshitz formula with the film dielectric tensor derived from the one-electron energies and wavefunctions under the assumption of a constant potential inside the film and a uniform distribution of the positive ion charge. The results show that quantization effects tend to reduce the force with respect to the continuum plasma model. The reduction is more significant at low electron densities and for film size of the order of few nanometers and persists for separation distances up to 10 nm. Comparison with previous work indicates that the softening of the boundary potential is important in determining the amount of the reduction. The calculations are extended to treat Drude intraband absorption. It is shown that the inclusion of relaxation time enhances the size quantization effects in the force calculations

Feasibility, Interrater Reliability and Internal Consistency of the German Environmental Audit Tool (G-EAT)

Dementia-specific environmental design has the potential to positively influence capabilities for daily living and quality of life in people with dementia living in nursing homes. To date, no reliable instrument exists for systematically assessing the adequacy of these built environments in Germany. This study aimed to test the adapted version of the Environmental Audit Tool—High Care (EAT-HC)—the German Environmental Audit Tool (G-EAT)—with regard to its feasibility, interrater reliability and internal consistency. The G-EAT was applied as a paper-pencil version in the German setting; intraclass correlation coefficients at the subscale level ranged from 0.662 (III) to 0.869 (IV), and 42% of the items showed at least substantial agreement (Cohen’s kappa ≥ 0.60). The results indicate the need to develop supplementary material in a manual that illustrates the meaning of the items and practical implications regarding dementia-specific environmental design. Furthermore, the intersectionality of built and physical environments must be considered when interpreting G-EAT results in future research and applications to residential long-term care practice

Coupling of solvent semimicroextraction with capillary electrophoresis using ethyl acetate as sample matrix

10.1002/(SICI)1522-2683(20000201)21:3<573Electrophoresis213573-578ELCT