Computer Sciences
In a recent study, researchers at the ARC Centre of Excellence for Mathematical and Statistical Frontiers (ACEMS) in Adelaide have tried to use ecology-related concepts to model effective cast sizes for movies, focusing on ...
Jul 5, 2019 feature
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Energy & Green Tech
Hydrogen is a promising future fuel—especially if produced from water—but the necessary noble metal catalysts are rare, expensive, and have insufficient reserves. But now, in a study recently published in Advanced Materials, ...
Nov 11, 2022
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Computer Sciences
High-entropy alloys (HEAs) have desirable physical and chemical properties such as a high tensile strength, and corrosion and oxidation resistance, which make them suitable for a wide range of applications. HEAs are a recent ...
Aug 5, 2021
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Computer Sciences
(Tech Xplore)—Lava lamps are well known for mood-enhancing functions in living rooms, after-hours cubicles, or anywhere else where humans prefer to dream while wide awake. For a security company with headquarters in San ...
Nov 14, 2017 weblog
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Computer Sciences
We've all seen art made from data, but what about data from art?
Nov 4, 2022
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Engineering
Additive manufacturing techniques used to produce metal alloys have gained popularity due to their ability to be fabricated in complex shapes for use in various engineering applications. Yet the majority of studies conducted ...
Oct 3, 2022
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53
Engineering
Gas turbines are widely used for power generation and aircraft propulsion. According to the laws of thermodynamics, the higher the temperature of an engine, the higher the efficiency. Because of these laws, there is an emerging ...
Aug 25, 2022
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Computer Sciences
When you hear the words "time crystal" you could be forgiven for imagining something fantastic like a magic crystal ball or a device for time travel. But time crystals are very real, although they are a bit like magic.
Mar 3, 2022
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Security
We are, in the pandemic world, even more dependent on online services than we ever have been before, whether as remote workers, those learning from home, or in healthcare. As such, there is an increasing need to ensure those ...
Jan 14, 2022
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Entropy is a concept applied across physics, information theory, mathematics and other branches of science and engineering. The following definition is shared across all these fields:
where S is the conventional symbol for entropy. The sum runs over all microstates consistent with the given macrostate and is the probability of the ith microstate. The constant of proportionality k depends on what units are chosen to measure S. When SI units are chosen, we have k = kB = Boltzmann's constant = 1.38066×10−23 J K−1. If units of bits are chosen, then k = 1/ln(2) so that .
Entropy is central to the second law of thermodynamics. The second law in conjunction with the fundamental thermodynamic relation places limits on a system's ability to do useful work.
The second law can also be used to predict whether a physical process will proceed spontaneously. Spontaneous changes in isolated systems occur with an increase in entropy.
The word "entropy" is derived from the Greek εντροπία "a turning towards" (εν- "in" + τροπή "a turning").
This text uses material from Wikipedia, licensed under CC BY-SA
