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"Piloti" sculptural installation by Marc Fomes/THEVERYMANY studio, Bellevue Downtown Park, Bellevue, WA.
Mon, Oct 1 6:00pm
Fluid filled porous materials are widely spread in nature and technology. Rocks, marine sediments, bones and sponges represent only a small portion of substances, which can be named porous materials. For many applications such as marine and geophysical or medical acoustics, clear understanding of the propagation of waves in such materials is of great interest. We present the basics of the theory based on the Lagrangian approach to the mechanics of penetrable porous materials. This theory is universal in sense that by construction it works for perturbation of arbitrary amplitude for isotropic, anisotropic, homogeneous or non-homogeneous materials. In frame of developed approach, the theory of propagation of acoustic (infinitely small-amplitude) waves naturally appears as approximation of the general theory in the small neighborhood of a stationary state of the material, which can itself be found in frame of static case of the theory. Also, we demonstrate critical importance of the waves of the second types for understanding of the propagation and attenuation of low frequency acoustic (seismic) waves in randomly non-homogeneous penetrable materials. At last, we discuss new alternative classifications of small amplitude wave modes based on classic representation of dispersion equations of propagating waves.
“Make your ego porous. Will is of little importance, complaining is nothing, fame is nothing. Openness, patience, receptivity, solitude is everything.”
― Rainer Maria Rilke
Sticker, oil pen, and collage elements on found paper
5.25"x7.5"
Marc-Anthony Macon, 2024
$55
This is a cross section of an oak (Quercus) stem. Note the production of vessel tubes in the spring to produce a ring-porous growth pattern.
Common deficiencies include porous foundations, broken main drain pipes, substandard renovations, leaning brick walls, and old roofs.
A home inspector is there to help purchasers make a sound decision while in a pressurized and emotionally charged environment. Learn more: Meredith Home Inspection
David a complété le Programme d’inspection en bâtiment résidentiel du Collège Vanier parmi les premiers de sa classe. Il est entièrement assuré et membre candidat en règle de l’AIBQ. Il est bilingue et offre ses rapports d’inspection en anglais. Plus d'info: Meredith Inspection de Maisons