Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

A guide with examples for learning this key idea in options trading Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive ...

We enable experimental activities that challenge the status quo. Radical creativity is one of the three cross-cutting approaches in our living strategy. We integrate solutions for sustainability, ...

Radical nephrectomy removes an entire kidney and surrounding structures. A unilateral nephrectomy leaves one kidney and does not require dialysis. Laparoscopic nephrectomy has a shorter recovery time ...

Quaternary ammonium compounds (QACs), a large class of chemicals that includes high production volume substances, have been used for decades as antimicrobials, preservatives, and antistatic agents and ...