At each sampling time instant, one observes system output and action to form discrete-time rewards. The sampled input-output data are collected along the trajectory of the dynamical system in ...

Time crystals break time-translational symmetry rather than spatial symmetry, as ordinary crystals do. Peter Hannaford and Krzysztof Sacha look at how this exotic state could have similar applications ...

Abel is an associate professor of law at UC Law, San Francisco. His academic research focuses on informational asymmetries in the criminal justice system and the structural injustices these ...

The concept of time in the context of a real time operating system was introduced in an earlier article, along with an idea of the facilities associated with time that likely to be available with an ...

Correspondence to Dr John E Kuhn, Chief of Shoulder Surgery, Vanderbilt University Medical Center, Vanderbilt Sports Medicine, 3200 MCE South Tower, 1215 21st Avenue South, Nashville, TN 37232, USA; j ...