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Showing posts from September, 2023

An Analytical Solution for Horizontal Infiltration in Highly Selected Porous Media: Anchoring in Sorptivity and Van Genuchten-Mualem Parameter

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This is an updated version of a previously posted article that had been published on June 17, 2025 on this blog. Celso Luiz Prevedello Abstract This work proposes an analytical model specifically for highly selected porous media (n>10), using a continuous sigmoidal moisture profile to describe the transition zone during horizontal infiltration. The parameter n represents an adjustment factor of the van Genuchten (1980) model for the soil water retention curve, and is related to the uniformity of pore distribution. The parameter n>10 of van Genuchten suggests a very uniform pore distribution. The specialization for n>10 addresses the growing demand of modern engineering for synthetic and designed materials with very uniform pore distribution, widely used in industrial filtration, draining pavement, technical substrates and advanced geotechnical systems. The model was developed specifically for materials with characteristics similar to very well selected sands, such as the porou...
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WOODEN BLOCK INLAY VASE: DO IT YOURSELF

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By Celso Luiz Prevedello I made this vase myself, and I've crafted several similar ones purely for the joy of it, either as gifts for family and friends or even for sale. If you're someone like me, who admires crafts, loves working with wood, or even already has a workshop for DIY or hobbies, take note: REQUIRED MATERIALS Band saw Clamp or wood glue clamps Wood glue Slats of varying colors and a standard length of 350 or 400mm, for instance Flat drill bit with a hex shank (7/8” or 1”) Electric drill Manual or electric sander Medium and fine-grit sandpaper Personal protective equipment MAKING PROCESS 1. On the band saw table, square and fix a guide to direct the cutting of the slats to form sticks of the desired width (for instance, 15mm). Keep this guide fixed on the table. 2. The slats may have different widths. It doesn’t matter! Perform the longitudinal cuts to create the sticks so that each one has the same standard width previously set between the guide and the saw blade (...
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