of Jet (N) ...5Flat Plate moves at a Velocity of 2 m/s:...5Curved Plate moves at
作者: A Führböter 摘要: A special impact generator was constructed in order to produce water impacts with velocities which are not available in scale models with waves. The water impact was generated by a jet suddenly striking upon a measuring area. Even under same conditions of impact, ...
a single line, and is more or less impossible to maneuver. But a sport kite—a needle-nosed, fighter-jet-like wing of nylon or polyester—has two lines, which an operator can use to induce acrobatic turns. Moore was skilled with a yo-yo and had watched riders do tricks on their ...
The idea of sentient, lab-created “organoids” raises ethical questions that ripple through science. Tests could include physical scans, mathematical models, and more. Scientists say there are reasons it could be necessary to create consciousness … and destroy it. A thought-provoking new article...
So then we set up a whole, again, not only supply chain from the companies, but we had a whole from the student side, where they were, that had 3D printers and other grad students, like, took the 3D printers out of the lab, right before they closed everything down. So they ...
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The impact and splash of liquid drops on solid substrates are ubiquitous in many important fields. However, previous studies have mainly focused on spherical drops while the non-spherical situations, such as raindrops, charged drops, oscillating drops, a
On flat surfaces, the resulting hydrodynamic singularity causes ejection of a narrow high-speed jet38. For impact on superhydrophobic sieves, the pore limits the lateral extent of the collapsing cavity. It also sets the lateral boundary for the interface motion resulting from the cavity collapse. ...
While the regional distribution of non-native species is increasingly well documented for some taxa, global analyses of non-native species in local assemblages are still missing. Here, we use a worldwide collection of assemblages from five taxa - ants, b
There is increasing awareness of invasion in microbial communities worldwide, but the mechanisms behind microbial invasions remain poorly understood. Specifically, we know little about how the evolutionary and ecological differences between invaders and