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 ...
Lower back spasms are involuntary contractions or tensing of the muscles in the lower back, and they may affect movement. Doctors may recommend medications, lifestyle changes, and complementary ...
Vaginismus makes vaginal penetration painful or impossible due to pelvic floor muscles involuntarily contracting. Primary vaginismus is lifelong, while secondary vaginismus develops after previously ...
Labor contractions can feel like intense cramps or pressure. Braxton-Hicks contractions do not follow a pattern and may stop with activity. Early labor contractions become more regular and stronger ...
Abstract: We introduce the concept of a control contraction metric, extending contraction analysis to constructive nonlinear control design. We derive sufficient conditions for exponential ...
Abstract: In this article, we examine the role of differential positivity in the contraction analysis of discrete-time nonlinear systems with parameters that follow stochastic processes. We ...
Premature atrial contractions (PACs) are usually harmless and not a cause for concern. People with PACs may feel skipped or extra heartbeats, but often there are no symptoms. PACs are common and can ...
a Medizinische Klinik, Klinikum Innenstadt, University of Munich, Munich, Germany, b Department of Internal Medicine, Park-Klinik Weissensee, Berlin, Germany Dr W A Voderholzer, Medizinische Klinik, ...
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