Mnemonics in antiquity were most often considered in the context of what is today known as the Art of memory.

Mnemonics is the debut album released by Australian classical guitarist Alan Banks.

Mnemonics rely on associations between easy-to-remember constructs which can be related back to the data that is to be remembered.

Two of the most popular are " OIL RIG " ( Oxidation Is Loss, Reduction Is Gain ) and " LEO " the lion says " GER " ( Lose Electrons: Oxidization, Gain Electrons: Reduction ).

* " LEO the lion says GER " — Loss of Electrons is Oxidation, Gain of Electrons is Reduction.

* BBC Science-Electronic Brains BBC Radio 4 Series about early computers, Programme 1 is about LEO

Nowadays resistojet propulsion is used for orbit insertion, attitude control, and deorbit of LEO satellites, including satellites in the Iridium satellite constellation.

The 40 megajoules per kilogram or less kinetic energy of projectiles launched at up to 9000 m / s velocity ( if including extra for drag losses ) towards Low Earth Orbit is a few kilowatt-hours per kilogram if efficiencies are relatively high, which accordingly has been hypothesized to be under $ 1 of electrical energy cost per kilogram shipped to LEO, though total costs would be far more than electricity alone.

Batteries are typically connected to the bus via a battery charge regulator, and the batteries are used to provide electrical power during periods when primary power is not available, for example when a Low Earth Orbit ( LEO ) spacecraft is eclipsed by the Earth.

A geostationary transfer orbit is used to move a satellite from low Earth orbit ( LEO ) into a geostationary orbit.

A Low Earth Orbit ( LEO ) typically is a circular orbit about above the earth ’ s surface and, correspondingly, a period ( time to revolve around the earth ) of about 90 minutes.

A low Earth orbit ( LEO ) is generally defined as an orbit below an altitude of approximately.

Given the rapid orbital decay of objects below approximately, the commonly accepted definition for LEO is between and above the Earth's surface.

LEO is an orbit around Earth between the atmosphere and below the inner Van Allen radiation belt.

The International Space Station is in a LEO that varies from to above the Earth's surface.

Since it requires less energy to place a satellite into a LEO and the LEO satellite needs less powerful amplifiers for successful transmission, LEO is still used for many communication applications.

Because these LEO orbits are not geostationary, a network ( or " constellation ") of satellites is required to provide continuous coverage.

" Behind the Curtain at LEO: A Personal Reminiscence ".

Extract from Peter Bird's LEO — The First Business Computer ( 2002 ); at David Lawrence's Lyons website

While a majority of artificial satellites are placed in LEO, making one complete revolution around the Earth in about 90 minutes, many communication satellites require geostationary orbits, and move at the same angular velocity as the Earth.

Remote sensing satellites can also take advantage of sun-synchronous LEO orbits at an altitude of about and near polar inclination.

Low Earth orbiting satellites ( LEOs ) are often deployed in satellite constellations, because the coverage area provided by a single LEO satellite only covers a small area that moves as the satellite travels at the high angular velocity needed to maintain its orbit.

The Yohkoh spacecraft at LEO observed the Sun from 1991 to 2001 in the X-ray portion of the solar spectrum and was useful for both research and space weather prediction.

Applying a delta-v at the LEO of only 0. 78 km / s more ( 3. 20-2. 42 ) would give the rocket the escape speed, while at the geostationary orbit a delta-v of 1. 46 km / s is needed for reaching the escape speed of this circular orbit.

Glass eel on the online in situ microscope at the Longterm Ecological Observatory | LEO project.

Glass Eel on the online in situ microscope at the LEO project

Image: rostrataluk. jpg | Glasseel on the online in situ microscope at the LEO project.

Computer controlled motorized parabolic dish antenna for tracking Low Earth orbit | LEO weather satellites. Polar orbiting weather satellites circle the Earth at a typical altitude of 850 km ( 530 miles ) in a north to south ( or vice versa ) path, passing over the poles in their continuous flight.

This means that the debris field from such a collision is not the same as a LEO collision and does not pose the same sort of risks, at least over the short term.

:: Geosynchronous transfer orbit-A geocentric-elliptic orbit where the perigee is at the altitude of a Low Earth Orbit ( LEO ) and the apogee at the altitude of a geosynchronous orbit.

LEO satellites orbit the earth in high speed, low altitude orbits with an orbital time of 70 – 100 minutes, an altitude of 640 to 1120 kilometers ( 400 to 700 miles ), and provide coverage cells of about ( at a 100-minute orbital period ) 2800 km in radius ( about 1740 mi ).

Thus for example the delta-v for a Hohmann transfer from Earth's orbital radius to Mars ' orbital radius ( to overcome the Sun's gravity ) is many kilometres per second, but the incremental burn from LEO over and above the burn to overcome the Earth's gravity is far less if the burn is done close to the Earth than if the burn to reach a Mars transfer orbit is performed at Earth's orbit, but far away from Earth.

SpaceDev built and conducted early orbit operations of the Low Earth Orbit ( LEO ) microsat, the first to use only the Internet for its communications, for University of California at Berkeley under NASA's University Explorer Program ( UNEX ).

G & L ( GEORGE AND LEO ) was started at CLF behind Music Man's back and coincidence or other CLF made 2, 500 Music man bass necks with straight truss rods.

As early as 2006, ULA's predecessor company Lockheed Martin was looking at a human-rated version of the Atlas V. An agreement between Lockheed and Bigelow Aerospace that year was reported that could lead to commercial private trips to low-Earth orbit ( LEO ).

The test-flight phase is expected to culminate with a crewed mission at the end of 2015, carrying two Boeing test-pilot astronauts into LEO and returning them safely.

Mass to LEO numbers are at an inclination of 28. 5 degrees.

A NASA multi-center Technology Applications Assessment Team led from the Johnson Spaceflight Center, has as of January 2011 described " Nautilus-X ", a concept study for a multi-mission space exploration vehicle useful for missions beyond low earth orbit ( LEO ), of up to 24 months duration for a crew of up to six.

Users of LEO computers programmed in two coding languages: Intercode, a low-level assembler type language ; and CLEO ( acronym: Clear Language for Expressing Orders ), the COBOL equivalent.

The Obama Administration proposed a revision of Constellation in 2010 to focus on the development of the capability for crewed missions beyond low earth orbit ( LEO ), envisioning extending the operation of the ISS beyond 2020, transferring the development of launch vehicles for human crews from NASA to the private sector, and developing technology to enable missions to beyond LEO, such as Earth / Moon L1, the Moon, Earth / Sun L2, near-earth asteroids, and Phobos or Mars orbit.

There were disputes between U-M's administration and labor unions, notably with the Lecturers ' Employees Organization ( LEO ) and the Graduate Employees Organization ( GEO ), the union representing graduate student employees.

Objects in LEO encounter atmospheric drag in the form of gases in the thermosphere ( approximately 80 – 500 km up ) or exosphere ( approximately 500 km and up ), depending on orbit height.

The Joint Space Operations Center, part of United States Strategic Command ( formerly the United States Space Command ), currently tracks more than 8, 500 objects larger than 10 cm in LEO, however a limited Arecibo Observatory study suggested there could be approximately one million objects larger than 2 millimeters, which are too small to be visible from Earth.

Examples of satellite constellations include the Global Positioning System ( GPS ), Galileo and GLONASS constellations for navigation and geodesy, the Iridium and Globalstar satellite telephony services, the Disaster Monitoring Constellation and RapidEye for remote sensing, the Orbcomm messaging service, Russian elliptic orbit Molniya and Tundra constellations, the large-scale Teledesic and Skybridge broadband constellation proposals of the 1990s, and the proposed LEO global backhaul constellation named COMMStellation ™.

For launches above low Earth orbit ( LEO ), the actual launch time can be somewhat flexible if a parking orbit is used, because the inclination and time the spacecraft initially spends in the parking orbit can be varied.

These clubs include but are not limited to Wine Appreciation Club, LSD ( Lincoln Snowboarding Department ), Alpine Club, LEO ( Lincoln Environmental Organisation ), Food Appreciation Club, The Lincoln University Campus Choir, Bunch Rides ( cycling ), Lincoln University Rugby Club, Lincoln Malaysian Students Society ( LMSS ), International Rugby Club, UniQ ( lesbian, gay and transgender students on campus ), Boxing Club, Young Farmers Club, and Lincoln Christian Fellowship.

EE tried to take over one of the other major British electrical companies, the General Electric Company ( GEC ), in 1960 and, in 1963, EE and J. Lyons and Co. formed a jointly-owned company – English Electric LEO Company – to manufacture the LEO Computer developed by Lyons.

She lost to Democratic challenger John Yarmuth, former publisher and editorialist of the Louisville Eccentric Observer ( LEO ), an alternative newsweekly.