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Einstein's light box. At the Sixth Solvay International Conference on Magnetism (1930), Einstein came armed with a new thought experiment. This involved a box with a shutter that operated so quickly, it would allow only one photon to escape at a time. The box would first be weighed exactly.
Light table at Tito's bunker Draftsman using light table. A light table [1] is a viewing device that is used to review photographic film or artwork placed on top of it. A horizontal form of a self-standing lightbox, it provides even illumination of the subject from below through a translucent cover and fluorescent lights that emit little heat.
The Alcubierre drive ([alkuˈβjere]) is a speculative warp drive idea according to which a spacecraft could achieve apparent faster-than-light travel by contracting space in front of it and expanding space behind it, under the assumption that a configurable energy-density field lower than that of vacuum (that is, negative mass) could be created.
Energy neutral design can also refer to environmentally powered electronics, where devices absorb or harvest energy from their immediate surroundings (ex. light, heat, radio waves, motion) and transform it to the electricity they require for their operation. One example of this is the batteryless radio.
Regenerative design uses systems thinking and other approaches to create resilient and equitable systems that integrate the needs of society and the well-being of nature. Regenerative design is an active topic of discussion in engineering, economics, medicine, landscape design, food systems, and urban design & community development generally.
Switching to these energy sources requires that end uses, such as transport and heating, be electrified for the world's energy systems to be sustainable. In the U.S. and Canada the use of heat pumps (HP) is economic if powered with solar photovoltaic (PV) devices to offset propane heating in rural areas [ 24 ] and natural gas heating in cities ...
In addition to the electricity sector, energy system models include the heat, gas, mobility, and other sectors as appropriate. [26] Energy system models are often national in scope, but may be municipal or international. So-called top-down models are broadly economic in nature and based on either partial equilibrium or general equilibrium.
[41] (see end of report for contract details) The Clean and Affordable Energy Act of 2008 (D.C. Code §8-1773.01 et seq.) created the DC SEU as a private entity tasked to "administer sustainable energy programs in the District, including the development, coordination, and provision of programs for the purpose of promoting the sustainable use of ...