Abstract: The hardness of the coal seam significantly influences the relationship between feeding speed and resistance at the drill bit. Due to the compressive deformation of the drill string, ...
Add Yahoo as a preferred source to see more of our stories on Google. The U.S. Navy has shown no signs of reversing course on major changes to its pipeline for new Naval Aviators in its latest draft ...
The future USS John F. Kennedy (CVN-79) left Jan. 28, 2026, from HII’s Newport News Shipbuilding division for builder’s trials. HII photo The future USS John F. Kennedy (CVN-79), the Navy’s second ...
If you’ve ever found yourself scrolling through a particularly infuriating thread of comments online, you might have come across someone interjecting with some version of the words “touch grass.” This ...
With much of the country in the grip of extreme cold, most folks are walking the line between feeling comfortable and managing their heating budget. There are plenty of things to do to prep your home ...
Canada is lowering tariffs to allow Chinese EVs in the country, a move many say will supplant the U.S. auto industry there. Michiganders will likely start to see Chinese EVs for the first time and ...
Abstract: Phase-corrected proportional resonant (PCPR) current controllers are mainly studied under high carrier ratio conditions. When applied to high-power converters with low carrier ratios, the ...
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