Abstract: The issue of constructing piecewise linear Lyapunov functions (PLLFs) for the stability analysis of polytopic uncertain linear systems is considered. PLLF candidates are parametrized by ...

NEW YORK and HOUSTON, Nov. 7, 2025 /PRNewswire/ -- A mismatch between two common tests for kidney function may indicate a higher risk for kidney failure, heart disease, and death, a new study shows.

Many people with multiple sclerosis (MS) expect to cope with physical challenges like problems with walking or seeing, but the disease's central nervous system damage often causes mental health ...

Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American Lung Association’s annual State of the Air report, released Wednesday.

DEAR DR. ROACH: I’m 65 years old, and for the past year, I have not been able to maintain an erection while making love with my wife. I can still ejaculate, just not inside her. With cuddling and ...

In the late 19th century, Karl Weierstrass invented a fractal-like function that was decried as nothing less than a “deplorable evil.” In time, it would transform the foundations of mathematics.

Adam Guastella receives funding from the National Health and Medical Research Council and Australian Research Council for research into neurodevelopmental conditions. He is director of the Clinic for ...

You may have heard of the scapula before, though it is more commonly called the shoulder blade. Scapulas play a very important role in the way your arms, shoulders, and back move. The scapula is a ...

The COUNTIFS function in Excel is a powerful and versatile tool for counting cells based on multiple criteria. It offers a significant advantage over the COUNTIF function, which is limited to handling ...