The humpback whale has pronounced bumps or tubercles along the leading edge of its pectoral flippers (above left). A idealized model of the flipper (above upper right), which was tested in a wind tunnel, demonstrated that the tubercles enhanced hydrodynamic performance…
airblade, turbine, windmill
Continue reading walefin for optimized turbines
At first, we strenuously observed crystals of tap water, river water, and lake water. From the tap water we could not get any beautiful crystals. We could not get any beautiful ones from rivers and lakes near big cities, either.
memory storage, health care applications
Continue reading Use water as a memory storage for computers?
Many morpho butterflies are colored in metallic, shimmering shades of blues and greens. These colors are not a result of pigmentation but are an example of iridescence through structural coloration: the microscopic scales covering the Morpho’s wings reflect incident light repeatedly at successive layers, leading to interference effects that depend on both wavelength and angle of incidence/observance.
“painting” without pigments, thermal sensors
Continue reading Morpho butterfly; color without pigments
For example, an abalone shell is stronger than high-tech ceramics because of its internal structure. Diatom shells are made of silica (glass), but they are extremely strong because of their stress-distributing pattern of holes.
Like nature, 3-D printers can excel at building complex structures from simple materials, said Benyus. Both use an additive process, meaning larger pieces are built up from smaller ones.
unexpected high! Continue reading Seashells are harder than ceramics and can be printed by your desktop 3D printer?
Honeycomb structures are natural or man-made structures that have the geometry of a honeycomb to allow the minimization of the amount of used material to reach minimal weight and minimal material cost.
composit materials, low weight constructions
Continue reading Honeycomb for stiff constructions
Insects have a wide field of view and are acutely sensitive to motion, as anyone who has tried chasing a housefly knows. Researchers have now created a digital camera that mimics the curved, compound structure of an insect eye. These cameras could be used where wide viewing angles are important and space is at a premium — in advanced surveillance systems, for example, or in unmanned flying vehicles and endoscopes.
theater, giga-pix camera
Continue reading Insect´s eye for gigapixel cameras
Arboform acts a lot like any other petroleum-based plastic to a manufacturer. It can be injection-molded as a heated liquid to form any shape. But Arboform is not made of petroleum. Instead, it is made of “Lignin, combined with resins, flax and other natural fibers” as described in this article:
Continue reading Fluid wood instead of plastic for incredible structures