3,486 research outputs found
Evidences of World`s Technical Revolution 4.0
Over last three centuries industry as it is now has dramatically changed and
developed from global urbanization and steam machines to invention of PC with
variety of digital devices and spreading of the Internet. The Fourth Industrial
Revolution marked by emerging technology breakthroughs in a number of fields,
including robotics, artificial intelligence, nanotechnology, biotechnology, the Internet
of Things (IoT), 3D printing and autonomous vehicles. The Fourth Industrial
Revolution was declared in Davos on “World Economic Forum” in 2016. This
statement was built on the Digital Revolution, representing new ways in which
technology becomes embedded within societies and even the human body
Formal completions of N\'eron models for algebraic tori
We calculate the formal group law which represents the completion of the
N\'eron model of an algebraic torus over the rationals that splits in a tamely
ramified abelian extension. As a tools in the proof, we define and give
criterions to compute the Weil restriction of a formal group law and the analog
of the fixed part of a formal group law with respect to the action of a
(finite) group.Comment: 35 pages. New version with new functoriality results. Final version
in the Proceedings of the London Mathematical Society, link:
http://plms.oxfordjournals.org/cgi/content/abstract/pdp039?ijkey=NVyJlz51HbzrzxM&keytype=re
Localized Electron States Near a Metal-Semiconductor Nanocontact
The electronic structure of nanowires in contact with metallic electrodes of
experimentally relevant sizes is calculated by incorporating the electrostatic
polarization potential into the atomistic single particle Schr\"odinger
equation. We show that the presence of an electrode produces localized
electron/hole states near the electrode, a phenomenon only exhibited in
nanostructures and overlooked in the past. This phenomenon will have profound
implications on electron transport in such nanosystems. We calculate several
electrode/nanowire geometries, with varying contact depths and nanowire radii.
We demonstrate the change in the band gap of up to 0.5 eV in 3 nm diameter CdSe
nanowires and calculate the magnitude of the applied electric field necessary
to overcome the localization.Comment: 11 pages 4 figure
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