Turning Mobile Phones into 3D Scanners
Demonstration from the Computer Vision and Geometry Lab (part of ETH Zurich) of an unreleased app which can capture 3D data with a mobile phone camera without the aid of a depth sensor. Video embedded below:
There is no documentation currently available online, but it appears that data generation occurs both in-phone and with the assistance of data-connection, as well as being exportable.
19th century cane gun. Pulling the head from the shaft reveals a six shot percussion pepperbox revolver with a 6 3/4” dagger.
Honeycombs end up hexagonal just from a bit of physics
According to research published in the Journal of the Royal Society Interface, bees initially make circular cells and use their body heat to turn the wax into a viscous liquid. Then the surface tension at the 3-point junctions pulls the wax into a hexagonal shape. Apparently Charles Darwin had come up with this idea before but didn’t have enough evidence to prove it.
Cubes fall through “Flatland”. On the left is a view of the cube in perspective; on the right is a view from directly above which represents what a two-dimensional person viewing the cube from within the plane would be able to perceive.
The top animation shows a square falling through flatland on its face. The slices are always squares. So our two-dimensional person would see “a square existing for a while”.
The second animation shows a square falling through flatland on one of its edges. The slice begins as an edge, then becomes a rectangle; the rectangle grows, becomes a square for a moment, and then gets wider than it is tall. At its widest, it is as wide as the diagonal of one of the square faces of the cube. The rectangle then shrinks back to an edge at the top of the cube.
The third animation is the coolest one! The cube passes through Flatland on one of its corners. In this case, the initial contact is a point, which then becomes a small equilateral triangle. This triangle grows until it touches three of the corners of the cube. At this point, the corners of the triangles begin to be cut off by the other three faces of the cube. For a short moment, the triangle turns into a regular polygon. As the cube progresses through the plane, the slice turns again into a cut-off triangle (but inverted with respect to the original one) and finally becomes an equilateral triangle once again as three more vertices pass through the plane. This triangle shrinks down to a point and disappears.
In the third animation, what regular polygon does the triangle turn into halfway through its fall? If you can’t figure out, maybe this artwork by Robert Fathauer will help. (Scroll to the bottom.)
If a 4D cube entered our dimension, what would we see? If you can’t figure this out, check out this awesome page. (Click the GIF links.)
My spatial intelligence is TERRIBLE! This is magic!
THE ART OF MICROFLUIDICS
Research in fluid dynamics at the micro level produces amazing images. Colored dyes are used to track liquid flow, and the result can produce beautiful photographs. Even the lab setups are beautiful!
The underlying science is that fluids in micro-channels cannot present turbulence: they exemplify laminar flow. The friction of the walls of the channels becomes very important causing fluids to behave much like honey in a coffee cup.
Albert Folch’s lab at the University of Washington has created their own microfluidic art gallery using images from their research. You can even order photocanvases of their work (all proceeds go back to the lab to fund more art). The group has exhibited their art in Seattle and in Barcelona.
Tarantula tootsies appreciation post <3
yes good yes
I love spider foot designs. so much fluff, tiny little hooksies
oh god toes
I JUST SCREAMED LOUDLY AW THIS IS THE MOST ADORABLE THING EVER
fun fact: the reason that the plural of goose is geese but the plural of moose is not meese is because goose derives from an ancient germanic word undergoing strong declension, in the pattern of foot/feet and tooth/teeth, wherein oo is mutated to ee. however ‘moose’ is a native american word added to the english lexicon only ~400 years ago, and lacks the etymological reason to be pluralized in that way.
Oh baby. Keep talking dirty to me.