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Classical molecular dynamics simulations have been the preferred method to cope with the characteristic sizes and time scales of complex life-science systems. However, while classical methods have well known limitations, such as that their accuracy strongly depends on empirical tuning, the practical use of far more accurate methods that rely on quantum Hamiltonians, has been limited by the current...
One of the emerging candidates to bridge the gap between fast but volatile DRAM and non-volatile but slow storage devices is tetrahedral amorphous carbon (ta-C) based memory [1]-[3]. This offers a very good scalability, data retention and sub-5ns switching [2], [3]. Amorphous carbon memory devices can be electrically and optically switched from a high resistance state (HRS) to a low resistance state...
Carbon-based nonvolatile resistive memories are an emerging technology. Switching endurance remains a challenge in carbon memories based on tetrahedral amorphous carbon (ta-C). One way to counter this is by oxygenation to increase the repeatability of reversible switching. Here, we overview the current status of carbon memories. We then present a comparative study of oxygen-free and oxygenated carbon-based...
The end of Dennard scaling (i.e., the ability to shrink the feature size of integrated circuits while maintaining a constant power density) has now placed energy as a primary design principle in par with performance, all the way from the hardware to the application software. Along this line, optimizing the performance-energy balance of the 7/13 "dwarfs", introduced by UC Berkeley in 2006,...
Xe sealed under pressure of 50 bar inside a titanium cylinder closed with glass windows was tested as a scintillator for γ-ray detection. Taking advantage of Xe high atomic number of 54, high pressure Xe was used for γ-ray spectrometry in the range between 50 keV and 1.5 MeV. Compton electron response was also measured down to 7 keV by means of a Compton coincidence technique. The non-proportionality...
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