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0E (other)
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0E (zero E) or 0-E may refer to: *0E, or zero East, longitude for the Prime Meridian *0e, or On30 European notation for 0 scale using 16.5mm track *0 emission, or Zero emission **Zero Emissions Research and Initiatives **Zero-emissions vehicle *0 energy or Zero energy **zero energy building (ZEB), a building's use with zero net energy consumption and zero carbon emissions **Zero-energy Universe concept that the Universe's total amount of energy is exactly zero *0 element, or Zero element, one of several generalizations of the number zero to other algebraic structures See also * OE (other) *E0 (other) E0 or E00 can refer to: * ε0, in mathematics, the smallest member of the epsilon numbers (mathematics), epsilon numbers, a type of ordinal number * ε0, in physics, vacuum permittivity, the absolute dielectric permittivity of classical vacuum * E0 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Meridian
A prime meridian is an arbitrarily chosen meridian (geography), meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. On a spheroid, a prime meridian and its anti-meridian (the 180th meridian in a degree (angle), 360°-system) form a great ellipse. This divides the body (e.g. Earth) into hemispheres of Earth, two hemispheres: the Eastern Hemisphere and the Western Hemisphere (for an east-west notational system). For Earth's prime meridian, various conventions have been used or advocated in different regions throughout history. Earth's current international standard prime meridian is the IERS Reference Meridian. It is derived, but differs slightly, from the Prime meridian (Greenwich), Greenwich Meridian, the previous standard. Longitudes for the Earth and Moon are measured from their prime meridian (at 0°) to 180° east and west. For all other Solar System bodies, longitude is measured from 0° (their prime meridian) to 360 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
On30
On30 (also called On2, O16.5 and Oe) gauge is the modelling of narrow gauge railways in O scale on HO () gauge track in 1:48 scale ratio by American and Australian model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental European model railroaders (excluding France). Definitions On30 On30 uses the American O scale of inch to the foot, (ratio 1:48) to operate trains on HO gauge () track. The 30 indicates the scale/gauge combination is used to model narrow gauge prototypes, although it is often used to model and gauge prototypes as well. This scale/gauge combination is sometimes referred to as On2. O16.5 O16.5 (sometimes O-16.5) in the United Kingdom is a model railway scale/gauge combination of 7 mm to the foot. This is the same scale as British O scale (1:43.5 ratio) running on gauge track, which is also used by OO gauge model railways. It thus represents the prototype gauge of just over (e.g. the Snailbeach D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero Emission
A zero emission engine, electric motor, motor, process, or other energy source emits no waste products that pollute the environment or disrupt the climate. Zero emission engines Vehicles and other mobile machinery used for transport (over land, sea, air, rail) and for other uses (agricultural, mobile power generation, etc.) contribute heavily to climate change and pollution, so zero emission engines are an area of active research. These technologies almost in all cases include an electric motor powered by an energy source compact enough to be installed in the vehicle. These sources include hydrogen fuel cells, Traction battery, batteries, supercapacitors, and flywheel energy storage devices. In some cases, such as Air engine, compressed air engines, the engine may be mechanical rather than electrical. This mechanical engine is then powered by a passive energy source like compressed air, or a combustible non-polluting gas like hydrogen. The above engines can be used in all vehicles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero Emissions Research And Initiatives
Zero Emissions Research and Initiatives (ZERI) is a decentralized global network founded by Gunter Pauli in 1994 at the UNU after receiving support from the Japanese government. Initially headquartered at the UNDP in Geneva, and later at IUCN in Gland, ZERI operates as a decentralized network with 34 project offices worldwide. History ZERI participated in the World Expo in 2000 at Hanover, Germany. It was reported that the network constructed a pavilion almost entirely from Guadua. In 2009, the Specialty Coffee Association of America recognized ZERI for a 15-year project in Colombia. This project collaborated with coffee farms to utilize unharvested coffee plant material and trimmings to grow Shiitake mushrooms and was estimated to have created approximately 10,000 jobs. The Zero Emissions Commitment (ZEC) is a concept in climate science that explores how Earth's system processes may evolve after achieving net zero carbon dioxide Carbon dioxide is a chemical compound wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero-emissions Vehicle
A zero-emission vehicle (ZEV) is a vehicle that does not emit exhaust gas or other pollutants from the onboard source of power. The California definition also adds that this includes under any and all possible operational modes and conditions. This is because under cold-start conditions for example, internal combustion engines tend to produce the maximum amount of pollutants. In a number of countries and states, transport is cited as the main source of greenhouse gases (GHG) and other pollutants. The desire to reduce this is thus politically strong. Terminology Harmful pollutants to the health and the environment include particulates ( soot), hydrocarbons, carbon monoxide, ozone, lead, and various oxides of nitrogen. Although not considered emission pollutants by the original California Air Resources Board (CARB) or U.S. Environmental Protection Agency (EPA) definitions, the most recent common use of the term also includes volatile organic compounds, several toxic airborne com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero Energy Building
A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows and insulation, and solar panels. The goal is that these buildings contribute less overall greenhouse gas to the atmosphere during operation than similar non-ZNE buildings. They do at times consume non-renewable energy and produce greenhouse gases, but at other times reduce energy consumption and greenhouse gas production elsewhere by the same amount. The development of zero-energy buildings is encouraged by the desire to have less of an impact on the environment, and their expansion is encouraged by tax breaks and savings on energy costs which make zero-energy buildings financially viable. Terminol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero-energy Universe
The zero-energy universe hypothesis proposes that the total amount of energy in the universe is exactly zero: its amount of positive energy in the form of matter is exactly canceled out by its negative energy in the form of gravity. Some physicists, such as Lawrence Krauss, Stephen Hawking or Alexander Vilenkin, call or called this state "a universe from nothingness", although the zero-energy universe model requires both a matter field with positive energy and a gravitational field with negative energy to exist. The hypothesis is broadly discussed in popular sources. Edward P. Tryon, "Is the Universe a Vacuum Fluctuation?", ''Nature'', vol. 246, p. 396–397, 1973. Other cancellation examples include the expected symmetric prevalence of right- and left-handed angular momenta of objects ("spin" in the common sense), the observed flatness of the universe, the equal prevalence of positive and negative charges, opposing particle spin in quantum mechanics, as well as the crests and trou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero Element
In mathematics, a zero element is one of several generalizations of the number zero to other algebraic structures. These alternate meanings may or may not reduce to the same thing, depending on the context. Additive identities An ''additive identity'' is the identity element in an additive group or monoid. It corresponds to the element 0 such that for all x in the group, . Some examples of additive identity include: * The zero vector under vector addition: the vector whose components are all 0; in a normed vector space its norm (length) is also 0. Often denoted as \mathbf or \vec. * The zero function or zero map defined by , under pointwise addition * The ''empty set'' under set union * An '' empty sum'' or ''empty coproduct'' * An ''initial object'' in a category (an empty coproduct, and so an identity under coproducts) Absorbing elements An '' absorbing element'' in a multiplicative semigroup or semiring generalises the property . Examples include: *The ''empty set'', whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
