The world is an intricate web of interrelations, such that objects no longer have their own individual existence independent from other objects — like an endless game of quantum mirrors.
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Posted in engineering, transportation | Leave a Comment on On December 17, 1903, Wilbur and Orville Wright made four brief flights four miles south of Kitty Hawk, North Carolina with their first powered aircraft
The Wright brothers had designed the world’s first successful, heavier-than-air, powered airplane.
Find U.S. Department of Energy (DOE)-funded research about the Wright brothers’ innovative approach to development on OSTI.GOV:
• Accelerating Learning with Set-Based Concurrent Engineering: https://www.osti.gov/biblio/1605517
• Control Co-Design: An engineering game changer: https://www.osti.gov/biblio/1615248
• Engineering a Better Future: Interplay between Engineering Social Sciences and Innovation: https://www.osti.gov/biblio/1530161
Abstract: A central goal of condensed-matter physics is to understand how the diverse electronic and optical properties of crystalline materials emerge from the wavelike motion of electrons through periodically arranged atoms. However, more than 90 years after Bloch derived the functional forms of electronic waves in crystals [1] (now known as Bloch wavefunctions), rapid scattering processes have so far prevented their direct experimental reconstruction. In high-order sideband generation [2–9], electrons and holes generated in semiconductors by a near-infrared laser are accelerated to a high kinetic energy by a strong terahertz field, and recollide to emit near-infrared sidebands before they are scattered. Here we reconstruct the Bloch wavefunctions of two types of hole in gallium arsenide at wavelengths much longer than the spacing between atoms by experimentally measuring sideband polarizations and introducing an elegant theory that ties those polarizations to quantum interference between different recollision pathways. These Bloch wavefunctions are compactly visualized on the surface of a sphere. High-order sideband generation can, in principle, be observed from any direct-gap semiconductor or insulator. We thus expect that the method introduced here can be used to reconstruct low-energy Bloch wavefunctions in many of these materials, enabling important insights into the origin and engineering of the electronic and optical properties of condensed matter.
From: Joseph Costello [view email].
Posted in engineering, sustainability, transportation | Leave a Comment on World’s Fastest Aircraft: British Engineering Firm ‘Smashed’ All Records Of Environment Friendly Electric Planes
Rolls-Royce, the 115-year-old iconic British Engineering firm, has now achieved a new feat. After manufacturing world-class jet engines, it has left its mark in the electric aviation world.
Spirit of Innovation, a single-seat, electric-powered propeller plane built by Rolls-Royce, obliterated the zero-emission speed record, reaching over 556 kilometers per hour (345 mph) over a three-kilometer distance—and even maxing out at 623 kilometers per hour. This flight successfully smashed all previous records of electric planes which are environment friendly.
With a clarion call given by the COP26 on the need to cut emissions, Rolls-Royce has presented itself as a company that could earnestly provide that solution. With the aviation industry registering a record number of flights after a year of lockdowns, the emissions are set to grow further.
Infection during pregnancy with elevated levels of the cytokine IL-17a may yield microbiome alterations that prime offspring for aberrant immune responses, mouse study suggests.
Though many people with autism spectrum disorders also experience unusual gastrointestinal inflammation, scientists have not established how those conditions might be linked. Now MIT
MIT is an acronym for the Massachusetts Institute of Technology. It is a prestigious private research university in Cambridge, Massachusetts that was founded in 1861. It is organized into five Schools: architecture and planning; engineering; humanities, arts, and social sciences; management; and science. MIT’s impact includes many scientific breakthroughs and technological advances.
Atom ’s electrons are arranged in energy shells. Like concertgoers in an arena, each electron occupies a single chair and cannot drop to a lower tier if all its chairs are occupied. This fundamental property of atomic physics is known as the Pauli exclusion principle, and it explains the shell structure of atoms, the diversity of the periodic table of elements, and the stability of the material universe.
Now, MIT
MIT is an acronym for the Massachusetts Institute of Technology. It is a prestigious private research university in Cambridge, Massachusetts that was founded in 1861. It is organized into five Schools: architecture and planning; engineering; humanities, arts, and social sciences; management; and science. MIT’s impact includes many scientific breakthroughs and technological advances.
The solar module manufacturer Solitek (Lithuania), Avesta Battery & Energy Engineering (Abee) (Belgium) and Imecar Elektronik (Turkey) have signed a joint venture agreement for the set up of a new battery pack production in Lithuania (Vilnius).
