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"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.
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The Alva ST has a refined design that made me want to keep it out in my living room longer than many of the models on this list. The controls are limited on the top to power and individual options for 33 and 45 RPM speeds. Everything else is on the back panel, including Bluetooth pairing and preamp buttons. To complete the look, Cambridge Audio opted for a 1mm aluminium top plate, which sits on an MDF plinth with a layer of EVA to absorb vibrations in between.
Подростки распылили перцовый баллончик на пассажиров электрички под Петербургом20:54
Воронежский гарнизонный военный суд постановил конфисковать у бывшего замкомандующего Ленинградским военным округом генерала Валерия Муминджанова 17 миллионов 950 тысяч рублей в доход государства. Об этом сообщает РИА Новости.