We consider a continuous path of bounded symmetric Fredholm bilinear forms with arbitrary endpoints on a real Hilbert space, and we prove a formula that gives the spectral flow of the path in terms of the spectral flow of ...

We prove (under the condition of A. G. Kushnirenko) that all time changes of the horocycle flow have purely absolutely continuous spectrum in the orthocomplement of the constant functions. This provides an answer to a ...

We propose an algorithm that combines proper orthogonal decomposition with a spectral method to analyze and extract reduced ordermodels of flows from time data series of velocity fields. The flows considered in this study ...

A subgrid-scale spectral model of rotating turbulent flows is tested against direct numerical simulations (DNSs). The case of Taylor-Green forcing is considered, a configuration that mimics the flow between two counter-rotating ...

Peak frequency is a spectral seismic attribute widely used for reservoir thickness estimation and hydrocarbon detection. In this work we apply this attribute in the context of the geological storage of carbon dioxide (CO2) ...

Los autores realizaron un estudio de las posiciones más adecuadas para estudiar los flujos transmitral y transtricuspídeo por medio de Doppler espectral pulsado en caninos normales y determinar los valores medios de los ...