This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...
Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...
Abstract: The traditional heat-load generation pattern of combined heat and power generators has become a problem leading to renewable energy source (RES) power curtailment in cold regions, motivating ...
Background: Ventricular assist devices (VADs) are an effective treatment for end-stage heart failure and can significantly improve patients' quality of life. However, when the rotational speed of the ...
Abstract: Based on density function theory and density function perturbation theory, the thermal expansion coefficient and molar specific heat at constant pressure with temperature of wurtzite AlN are ...
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