Computer Sciences
According to computational complexity theory, mathematical problems have different levels of difficulty in the context of their solvability. While a classical computer can solve some problems (P) in polynomial time—i.e., ...
Apr 28, 2023
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86
Engineering
An international team of researchers, including nanoengineers at the University of California San Diego, has uncovered nanoscale changes inside solid-state batteries that could offer new insights into improving battery performance.
Apr 28, 2023
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85
Computer Sciences
Many real-world systems, from climate systems to the physical mechanisms of robots, are governed by the invariant quantities that arise from their underlying geometric structures. Modeling these systems using computer simulations ...
Apr 27, 2023
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17
Energy & Green Tech
The world needs cheap and powerful batteries that can store sustainably produced electricity from wind or sunlight so that we can use it whenever we need it, even when it's dark outside or there's no wind blowing. Most common ...
Apr 24, 2023
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5116
Energy & Green Tech
Solid-state batteries are considered as beacon of hope in battery research because, among other things, they can store higher amounts of energy and are faster to charge than conventional liquid electrolytes.
Apr 13, 2023
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7
Engineering
Chemists and engineers find innovative ways to access water—including by pulling it out of thin air. Now, University of Chicago researchers found a way to extract even more water.
Mar 30, 2023
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338
Hardware
Ultrathin phosphorus semiconductors that become metallic when stacked can tackle resistance issues and boost transistor performance.
Mar 13, 2023
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225
Software
Alternatives to carbon-producing energy sources are becoming ever more imperative as climate change shows its effects on the Earth and in our daily lives. Although fossil fuels still generate much of the electricity in the ...
Feb 21, 2023
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4
Energy & Green Tech
On a cold winter day, the warmth of the sun is welcome. Yet as humanity emits more greenhouse gases, the Earth's atmosphere traps more and more of the sun's energy, which steadily increases the Earth's temperature. One strategy ...
Feb 8, 2023
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49
Engineering
Combined ballistic impacts pose a major challenge for engineers who build structures that must withstand extreme stresses. The combination of blast pressure and impact at high speed increases the chances of greater damage. ...
Feb 2, 2023
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12
A computer simulation, a computer model or a computational model is a computer program, or network of computers, that attempts to simulate an abstract model of a particular system. Computer simulations have become a useful part of mathematical modeling of many natural systems in physics (computational physics), chemistry and biology, human systems in economics, psychology, and social science and in the process of engineering new technology, to gain insight into the operation of those systems, or to observe their behavior.
Computer simulations vary from computer programs that run a few minutes, to network-based groups of computers running for hours, to ongoing simulations that run for days. The scale of events being simulated by computer simulations has far exceeded anything possible (or perhaps even imaginable) using the traditional paper-and-pencil mathematical modeling: over 10 years ago, a desert-battle simulation, of one force invading another, involved the modeling of 66,239 tanks, trucks and other vehicles on simulated terrain around Kuwait, using multiple supercomputers in the DoD High Performance Computer Modernization Program; a 1-billion-atom model of material deformation (2002); a 2.64-million-atom model of the complex maker of protein in all organisms, a ribosome, in 2005; and the Blue Brain project at EPFL (Switzerland), began in May 2005, to create the first computer simulation of the entire human brain, right down to the molecular level.
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