Tootfinder

More #FreeCADFriday now in Friday in my own time zone. I have a fan that I want to make a table stand for to use outside while operating #HamRadio. First I modeled the fan in a silly amount of detail, including the grill, which took some learning, and I'm still pretty sure I d…

Iron microbialites from an acidic Martian analog (Río Tinto, Spain)—Implications for finding life on Mars: #Mars: https://www.uni-goettingen.de/en/3240.html?id=8237

For as long as you can remember, time has always slowed down for you during moments of danger.
This power is automatic and time returns to normal once you are out of peril.
One day, however, the world stops, and you can't figure out why.
#MicroFiction #TootFic

Hooray for science, y'all!
✅ Supplement that binds to microplastics may remove them from our body | New Scientist
https://www.newscientist.com/article/2580139-supplement-that-binds-to-microplastics-may-remove-them-fr…

Supplement that binds to microplastics may remove them from our body | New Scientist
A supplement comprised of dead bacteria seems to remove microplastics, and prevent their absorption into cells, by attracting them to the bacteria's rough surfaces

What the heck? Mozilla launches an AI product called #Thunderbolt like the cable standard and similar in name to their #Thunderbird e-mail client?
Must be all those ex Meta managers they hired.

Designing single-layer PDMS devices for micron to millimeter-scale deformations
Leon Valentin Gebhard, Alexandre S. Avaro, Gabriel Amselem, Charles N. Baroud
https://arxiv.org/abs/2605.17402 https://arxiv.org/pdf/2605.17402 https://arxiv.org/html/2605.17402
arXiv:2605.17402v1 Announce Type: new
Abstract: The elasticity of PDMS has played a central role in advancing important microfluidic technologies, ranging from early valves to sophisticated organ-on-a-chip systems. However, most deformable microfluidic devices are based on geometries that require complex multi-layer PDMS architectures and include thin membranes, leading to difficult microfabrication and poor stability. Recently, Jain, Belkadi et al. (Biofabrication 16.3 (2024): 035010) introduced a single-layer device in which a wide and long microfluidic channel was deformed by controlling the pressure in two independent and adjacent air chambers. While they demonstrated the ability to deform the channel ceiling to compress biological materials, the design parameters remain unexplored. Here, we perform a numerical study on 14,336 variants of this device and identify the height of the PDMS layer, the width of the microchannel and the width of the air chamber as the main features that determine the ceiling deformation. Three deformation modes are observed as the geometrical parameters are varied: A U shape with a central minimum, a W shape with two minima and a central maximum, or an inverse U shape with an upward-bulging single maximum. The numerical results are validated in experiments that reproduce the three shapes for the predicted geometries and demonstrate vertical ceiling deformations ranging from a few microns to the millimeter scale. The generality of this approach is demonstrated for two example applications: A fully closing single-layer microfluidic valve and an optical lens of controllable anisotropy. This work leverages the rapid prototyping enabled by 3D printing or micro-milling to open new perspectives in microfluidic actuation.
toXiv_bot_toot

Gebrauchsgegenstände aus #Plastik in der #Küche können #Mikroplastik ins Essen abgeben.
Das ist ein

Kochen und Küchenzubehör ohne Silikon und Plastik: So geht's
Plastikfrei kochen: So vermeidest du Kunststoffabrieb im Essen mit einfachen Alternativen aus Holz, Glas und Edelstahl.

"This political chameleon will not tear up the Westminster consensus from conviction. Everything rests on pressure from the left for change overcoming pressure from the ruling class to keep everything the same."
Makerfield: a chance to change politics, but only a chance | Morning Star
https://

It's #FreeCADFriday UTC, even if it's still Thursday evening where I am.
I am getting a screened pop-up gazebo/cabana for ham radio purposes (Field Day) and wanted to compare footprints of three different options. One has a 10' x 10' square footprint, and two have hexagonal footprints specified by their longest internal measurement, because bigger numbers sell, but I didn't h…

I remember looking at the model and thinking, "wait, that pocket looks way too big, I should verify that dimension" and then I forgot.
I'll make a captive insert and it will be fine.
#3DPrinting