Researchers discovered that pollution from North America's largest oil field has created multiple feedback loops accelerating Arctic warming and sea-ice loss, per a new study. Penn State scientists ...

Climate tipping points are thresholds within Earth’s climate system beyond which change becomes self-reinforcing and, in some cases, irreversible on human timescales. Rather than unfolding gradually, ...

The Arctic is changing rapidly, and scientists have uncovered a powerful mix of natural and human-driven processes fueling that change. Cracks in sea ice release heat and pollutants that form clouds ...

Abstract: Feedback control is ubiquitous in diverse fields. Most of existing control methods in general have a single feedback loop for each control objective. This paper proposes a new controller ...

This image, taken from the aircraft King Air — the left wing is visible at the bottom right, shows an open lead and the overlying nascent clouds commonly referred to as sea smoke. Sea smoke forms when ...

The climate is changing and nowhere is it changing faster than at Earth's poles. Researchers at Penn State have painted a comprehensive picture of the chemical processes taking place in the Arctic and ...

1 Department of Neurology, The First Hospital of Hebei Medical University, Shijiazhuang, China 2 Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, China ...

Abstract: In this letter we consider the high-affinity nitrate acquisition in plant roots. This process is governed by a mechanism including two loops of opposite signs we call Incoherent FeedBack ...

Engineers use feedback loops — typically negative feedback is more useful, but positive feedback is needed for oscillators. Negative feedback in an amplifier circuit, which has a negative loop gain, ...

The oceans absorb 90% of the heat from greenhouse gasses, causing evermore ice to melt. Kansas mayor hit with criminal charges for allegedly voting as noncitizen in several elections 10 Divorced Men ...