University of Amsterdam

About: University of Amsterdam is a education organization based out in Amsterdam, Noord-Holland, Netherlands. It is known for research contribution in the topics: Population & Context (language use). The organization has 59309 authors who have published 140894 publications receiving 5984137 citations. The organization is also known as: UvA & Universiteit van Amsterdam.

The emission spectrum and the radiative lifetime of Eu3+ in luminescent lanthanide complexes

Abstract: Although luminescent complexes of lanthanide ions and organic ligands have been studied intensively, relatively little attention has been paid to the natural (or ‘radiative’) lifetime of the lanthanide centered luminescent state in these systems. Here, the applicability of the well-known Judd–Ofelt theory to the emissive properties of Eu3+ complexes is investigated. Moreover, it is demonstrated experimentally that the radiative lifetime of the 5D0 excited state of Eu3+ can be calculated directly from its corrected emission spectrum, without using Judd–Ofelt theory. We also discuss briefly the possibility of finding the natural lifetimes of lanthanide ions other than Eu3+.

RASPA: molecular simulation software for adsorption and diffusion in flexible nanoporous materials

Abstract: A new software package, RASPA, for simulating adsorption and diffusion of molecules in flexible nanoporous materials is presented. The code implements the latest state-of-the-art algorithms for molecular dynamics and Monte Carlo (MC) in various ensembles including symplectic/measure-preserving integrators, Ewald summation, configurational-bias MC, continuous fractional component MC, reactive MC and Baker's minimisation. We show example applications of RASPA in computing coexistence properties, adsorption isotherms for single and multiple components, self- and collective diffusivities, reaction systems and visualisation. The software is released under the GNU General Public License.

Linking Theory and Practice: Changing the Pedagogy of Teacher Education

Abstract: The pressure towards more school-based teacher education programs, visible in many countries, creates a need to rethink the relationship between theory and practice. The traditional application-of-theory model appears to be rather ineffective and is currently being replaced by other, more reflective approaches. However, until now the variety of different notions and assumptions underlying these new approaches have not provided a sound basis for further development. Two related theoretical bases are presented for a new paradigm in teacher education. The first uses the concepts of episteme and phronesis to introduce a new way of framing relevant knowledge. The second is a more holistic way of describing the relationship between teacher cognition and teacher behavior, leading to a model of three levels in learning about teaching, the Gestalt level, the schema level and the theory level, which are illustrated by interview data. Building on these two theoretical, frameworks, a so-called “realistic approach” to...

Systema Porifera. A Guide to the Classification of Sponges

Abstract: Why write a book on sponge taxonomy; who would read such a book; what is the relevance of sponges; and what are sponges anyway?