Amanda Smith is a freelance journalist and writer. She reports on culture, society, human interest and technology. Her stories hold a mirror to society, reflecting both its malaise and its beauty.

Abstract: This article addresses the challenge of designing robust controllers for uncertain systems subject to multiple input and state constraints. A nonlinear ...

Abstract: In this paper, observer-based output feedback control is developed for discrete-time systems with multiple state delays and input delays. In order to estimate the system state, two types of ...

Converts word bank challenges to text input fields Supports various challenge types (translation, tap-to-complete) Maintains Duolingo's original styling Automatic focus management for seamless typing ...