We analyze the advantages of using ultra-cold coherent sources of atoms for matter-wave interferometry in space. We present a proof-of-principle experiment that is based on an analysis of the results previously published in [1] from which we extract the ratio h/m for 87 Rb. This measurement shows that a limitation in accuracy arises due to atomic interactions within the Bose-Einstein condensate...

This work deals with the evaluation of thin layers by a technique called ultrasound interferometry, which is based on the resonance and antiresonance of ultrasound waves verified in the presence of some interfaces having different acoustical impedances. A Graphical User Interface (GUI), developed in matlab was used to simulate the calculation of several coating thicknesses over different substr...

Metasurfaces are a family of novel wavefront-shaping devices with planar profile and subwavelength thickness. Acoustic metasurfaces with ultralow profile yet extraordinary wave manipulating properties would be highly desirable for improving the performance of many acoustic wave-based applications. However, designing acoustic metasurfaces with similar functionality to their electromagnetic count...

Gap-acoustic solitons (GASs), which make use of the nearly universal electrostrictive light-sound interaction, offer promising new avenues for slowing light. Optical gap solitons exist inside the frequency region of the band gap created by a Bragg grating. The Bragg grating, which may be considered as a distributed mirror for wavelengths in phase with it, keeps low-intensity light out of the ga...

Coda waves are sensitive to changes in the subsurface because the strong scattering that generates these waves causes coda waves to repeatedly sample a limited region of space. Coda wave interferometry is a technique that exploits this sensitivity to estimate weak changes in the medium from a comparison of the coda waves before and after the perturbation. Here I present the general theory of co...

Earthen dams and levees are prone to progressive failure through internal erosion of their structure. Internal erosion is often invisible to current methods of inspection until it manifests itself at the exterior surface. This study focuses on the novel use of passive seismic interferometry to monitor temporal changes in earthen embankments caused by internal erosion. This technique uses the am...

The field of surface wind blowing over the vast ocean areas is an important parameter for numerical models used for weather forecasts. Surface wind is currently measured from satellites. This provides necessary global coverage; however, measurements of high winds meet some difficulties due to weak dependency of the radarand radiometric signals on the wind velocity at high winds. In [1] a new me...

Co-application of acoustoelasticity and optical interferometry to residual stress analysis is discussed. The underlying idea is to combine the advantages of both methods. Acoustoelasticity is capable of evaluating a residual stress absolutely but it is a single point measurement. Optical interferometry is able to measure deformation yielding two-dimensional, full-field data, but it is not suita...