Inelastic X-Ray Scattering as a Probe of the Transition Between the Hydrodynamic and the Single Particle Regimes in Simple Fluids

In the last few decades, the study of the spectrum of density fluctuations in fluids at the transition from the continuous to the single particle regimes has attracted an increasing interest. Although the shape of the spectrum is well known in these two extreme limits, no theory firmly predicts its evolution in the broad crossover region. However, the development of inelastic X-ray scattering (IXS) has substantially expanded the potentialities of modern spectroscopy, thus, providing an unprecedented detailed mapping of such a crossover. A better understanding of the line-shape evolution in this intermediate regime is deemed to improve our knowledge of all dynamical processes occurring in a fluid from macroscopic to microscopic scales. The aim of this chapter is to review some relevant experimental contributions brought about by IXS in this field since its development toward the end of past millennium

Using X-ray as a Probe of the Terahertz Dynamics of Disordered Systems – Complementarity with Inelastic Neutron Scattering and Future Perspectivess

This Chapter is devoted to a general introduction of the high resolution (meV) inelastic x-ray scattering (IXS) technique. This starts from a theoretical derivation of the IXS cross section and the demostration of its link with the spectrum of density fluctuations. The complementarity of this technique with the other mesocopic spectrocopy method, inelastic neutron scattering (INS) is discussed in detail by emphasizing differences and similarities both from the practical and the teorethical points of view. Along with this general discussion, examples are given of both an existing IXS spectrometer and a new-concept one to be soon in operation. Finally, the result of a recent joint INS and IXS experiment on water, taking advantage of the complementarity of these two techniques, are described in the last paragraphs

Calculation of the shape of a two-dimensional supersonic nozzle in closed form

The idea is advanced of making a supersonic nozzle by producing one, two, or three successive turns of the whole flow; with the result that the wall contour can be calculated exactly by means of the Prandtl-Meyer "Lost Solution.

(Re)Considering the Scholarship of Learning: Inviting the Elephant in the Room to Tea

This essay argues that the SoT(L) field has mistakenly equated learning solely to teaching and the teaching classroom, and has systematically ignored the other moments and opportunities within higher education institutes where learning and scholarly learning occurs—particularly within academic support and development programming. Therefore, we endeavour to discuss what we see as the elephant in the SoT(L) living room—learning, scholarly learning, and the Scholarship of Learning—and examine the ways in which learning and the Scholarship of Learning can be brought back into the SoT(L) discussion through an examination of academic support and development programming. Through the creation of a new theoretical and diagrammatic SoTL framework, this essay presents a more integrated, enhanced, and expanded understanding of the Scholarship of Teaching and Learning, and does so to further dialogue and to recognize the Scholarship of Learning as a strong and important contribution to the SoTL literature