Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...
Abstract: In this letter, we propose ContactSDF, a method that uses signed distance functions (SDFs) to approximate multi-contact models, including both collision detection and time-stepping routines.
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Don't trust Excel's COUNTA function to count non-blank cells—here's a better method
In most counting scenarios in Excel, COUNTBLANK reliably counts blank cells, and COUNTA reliably counts populated cells.
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