This Paint Actively Cools Things Down

As artists and toddlers have long known, paints can provide lots of entertainment. But, not every part of the process is fun: Watching paint dry is synonymous with boredom, like watching the grass grow. It’s almost too bad, because there’s where the magic happens. The (usually) liquid paint drying, and becoming solid, is what gives the art (or school project, or bedroom wall) its longevity, its permanence. You can erase pencil and even some inks, but dried paint is there to stay. That

Water droplets dance across a surface using electricity

Cool things happen when you control water with a computer.

Holding tight on feathers – structural specializations and attachment properties of the avian ectoparasite Crataerina pallida (Diptera, Hippoboscidae) [RESEARCH ARTICLE]

Dennis S. Petersen, Nils Kreuter, Lars Heepe, Sebastian Büsse, Arndt H. J. Wellbrock, Klaudia Witte, and Stanislav N. Gorb

The louse fly Crataerina pallida is an obligate blood-sucking ecto-parasite of the common swift Apus apus. Due to reduction of the wings, C. pallida is unable to fly, thus an effective and reliable attachment to their host's plumage is of outmost importance. Its attachment system shows several modifications in comparison to other calyptrate flies. The most prominent ones are the large tridentate claws and the dichotomously shaped setae located on the pulvilli. Based on data from morphological analysis, confocal laser scanning microscopy, cryo-scanning electron microscopy and traction force experiments, performed on native (feathers) as well as artificial substrates (glass, epoxy-resin and silicone rubber), we showed that the entire attachment system is highly adapted to the fly's lifestyle as an ectoparasite. The claws in particular are the main contributor to strong attachment to the host. Resulting attachment forces on feathers make it impossible to detach C. pallida without damage of feathers or legs of the fly itself. Well-developed pulvilli are responsible for the attachment to smooth surfaces. Both dichotomously shaped setae and high setal density explain high safety factors observed on smooth substrates. For the first time, we demonstrated a material gradient within the setae with soft, resilin dominated apical tips and stiff, more sclerotized bases in Diptera. The empodium seems not to be directly involved in the attachment process, but it might operate as a cleaning device and may be essential to maintain the functionality of the entire attachment system.

Bernese Mars camera CaSSIS sends first colour images from Mars

Bern, Switzerland (SPX) Apr 27, 2018
The Mars camera CaSSIS on the ExoMars Trace Gas Orbiter has returned its first colour images of the red planet. The camera system, which was developed at the University of Bern, is now ready for the start of its prime mission on April 28, 2018. The Colour and Stereo Surface Imaging System (CaSSIS) has been designed by an international team under guidance of the University of Bern. The Mars

Porous Organic Salts To Stabilize Fuel Cells

Scientists in China have developed a new class of porous organic salts with high proton conductivity to power fuel cells.
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