Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Debt ratio shows a company's ability to handle debt and invest wisely. Trend in a company's debt ratio indicates its ongoing fiscal health and investment quality. Different industries justify varying ...

Have you ever heard of the Fibonacci sequence? Or the Golden Ratio? Or the Golden Spiral? These mysterious numbers and shapes are all connected to each other. If you look closely, they can be found in ...

A pulse oximeter measures blood oxygen levels at home and in healthcare settings. Abnormally low readings on a pulse oximeter might require medical care, especially if they are below 92%. Skin color ...

Unlock the power of the Golden Ratio in design. Learn practical tips, debunk myths, and create stunning visuals—no complex maths required. Look, I get it. You're probably thinking, “Great, another ...

Your cholesterol/HDL ratio is your total cholesterol divided by your HDL level. A cholesterol/HDL ratio of below 3.5 is optimal and indicates a very low risk for heart disease. Ratios above 5 to 1 are ...

Abstract: In this work, a detection and classification method for sleep apnea and hypopnea, using photopletysmography (PPG) and peripheral oxygen saturation (SpO 2) signals, is proposed. The detector ...

Conclusions: SpO2 and PR measurements may be inaccurate across all skin pigmentation groups, breaching U.S. Food and Drug Administration guidance and industry standard thresholds. Pulse oximeters ...