Abstract: Inverse scattering problems (ISPs) with a limited aperture have higher nonlinearity owing to the fewer measurement data, which brings more challenges in the application of full-wave ...

Carla Tardi is a technical editor and digital content producer with 25+ years of experience at top-tier investment banks and money-management firms. Robert Kelly is managing director of XTS Energy LLC ...

Abstract: In this article, we propose a new approach to design globally convergent reduced-order observers for nonlinear control systems via contraction analysis and convex optimization. Despite the ...

Sometimes we contract groups of words to make them shorter and to make the sentence more efficient. For example 'I am' becomes 'I'm'. They can help us speak a bit faster and more fluently. Conditional ...

Economic activity in the US manufacturing sector continued to contract in May as imports tumbled to their lowest level since 2009. The Institute for Supply Management's (ISM) manufacturing PMI ...

At the beginning of 2025, the U.S. economy faltered, experiencing its first contraction in three years. Faster-than-expected price increases and a dramatic increase in imports caused GDP to fall into ...

Sometime during your second or third trimester, you might start to feel mild, sporadic contractions, especially when you are tired or dehydrated, or after sex. These normal contractions, called ...

Some women who have complications during their pregnancy need a CST, although the test is much less common than it once was. More often, you would get a nonstress test or a biophysical profile. If ...

As pregnancy progresses, many women experience contractions that can leave them wondering if labour has begun. Braxton Hicks contractions, often referred to as ‘false labour, are a common occurrence ...