Dust is a general name for minute solid particles of diameters less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. On Earth, dust occurs in the atmosphere from various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. In addition, if composed of a flammable substance (suc ...

Including:

• Dust - House dust
• Dust - Dust in outer space
• Dust - Reference

Read more here: » Dust: Encyclopedia - Dust

See also:

Dust, Dust - House dust, Dust - Dust in outer space, Dust - Reference

Read more here: » Dust: Encyclopedia II - Dust - House dust

Dust is also widely present in outer space, where gas and dust clouds are primary precursors for planetary systems. The zodiacal light, seen in the sky at night, is produced by sunlight reflecting off particles of dust in orbit around the Sun. The tails of comets are produced by emissions of dust and ionized gas from the body of the comet. Dust also covers planetary bodies, and great dust storms are produced on Mars that can cover nearly the entire planet. Interstellar dust is found between the stars, pro ...

See also:

Dust, Dust - House dust, Dust - Dust in outer space, Dust - Reference

Read more here: » Dust: Encyclopedia II - Dust - Dust in outer space

A dust devil or whirlwind is either a large rotating updraft, anywhere from 1000 meters high or more and tens of meters in diameter, to a small vortex a few meters high. In Australia, they are commonly known as willy willies, from an Aboriginal word. Dust devil - Larger dust devils. The larger dust devils are often observed in times of atmospheric turbulence, especially common in the San Luis Valley of Colorado. Depending on the classification system used they may be considered weak tornados o ...

Including:

• Dust devil - Larger dust devils
• Dust devil - Smaller dust devils
• Dust devil - Electrical activities
• Dust devil - Martian dust devils

Read more here: » Dust devil: Encyclopedia - Dust devil

Cosmic dust - Introductory Material. Cosmic Dust refers to particles in space which are assemblages of a few molecules to tenth-millimeter-sized grains. Cosmic dust can be further distinguished by its astronomical location; for example: interplanetary dust, interstellar dust, comet dust, circumplanetary dust. This article covers bulk and radiative properties of cosmic dust, the dust particles' origins, end-fates, and specific locations in space. Historically, cosmic dust used to be an annoyanc ...

Including:

• Cosmic dust - Introductory Material
• Cosmic dust - Some bulk properties of cosmic dust
• Cosmic dust - Radiative properties of cosmic dust
• Cosmic dust - Dust grain formation
• Cosmic dust - Dust grain destruction
• Cosmic dust - Some dusty clouds in the universe

Read more here: » Cosmic dust: Encyclopedia - Cosmic dust

Coal dust is a fine powder form of coal. Because of the brittle nature of coal, coal dust may occur during mining or transportation, or whenever coal is handled mechanically. Coal dust - Risks. Coal dust suspended in air is explosive. Coal dust has far more surface area per unit weight than chunks of coal, and is more susceptible to spontaneous combustion. Note this may mean that a nearly empty coal store is a greater explosion risk than a full one. Coal workers' Pneumoconiosis, or bl ...

Including:

• Coal dust - Risks
• Coal dust - Coal dust in energy generation

Read more here: » Coal dust: Encyclopedia - Coal dust

An agricultural aircraft is an aircraft that has been built or converted for agricultural use -- usually aerial application of pesticides (crop dusting) or fertiliser (aerial topdressing); in this role they are referred to as "top dressers" or "crop dusters." Agricultural aircraft are also used for hydroseeding. The most common agricultural aircraft are fixed-wing, such as the Grumman Ag Cat, PAC Fletcher, or Rockwell Thrush Commander but helicopters are also used ...

Read more here: » Agricultural aircraft: Encyclopedia - Agricultural aircraft

55 Cancri (abbreviated 55 Cnc; Bayer designation ρ1 Cancri, Rho-1 Cancri) is a nearby 6th magnitude star in the constellation Cancer. The star is a binary system. The primary component is, like our Sun, a yellow dwarf, but slightly less massive and luminous. Secondary is a distant dim red dwarf. Distance to the system is 41 light years. The brighter component is visible through binoc ...

Including:

• 55 Cancri - The planets
• 55 Cancri - 55 Cancri e
• 55 Cancri - 55 Cancri b
• 55 Cancri - 55 Cancri c
• 55 Cancri - 55 Cancri d
• 55 Cancri - 55 Cancri dust disk
• 55 Cancri - 55 Cancri B

Read more here: » 55 Cancri: Encyclopedia - 55 Cancri

User Friendly is an online daily comic strip about the staff of a small, fictional internet service provider, Columbia Internet. The strip's humor tends to be centered around technology jokes and geek humor. It is drawn and authored by J.D. Frazer, a.k.a. "Illiad". It is considered to be one of the first major webcomics, and has been running since November 17, 1997. Although the drawings were shaky to start with, the jokes have been popular and t ...

Including:

• User Friendly - Main characters
• User Friendly - A.J. Garrett
• User Friendly - The Chief
• User Friendly - Dust Puppy
• User Friendly - Erwin
• User Friendly - Greg Flemming
• User Friendly - Mike Floyd
• User Friendly - Miranda Cornielle
• User Friendly - Pitr Dubovich
• User Friendly - Sid Dabster
• User Friendly - Smiling Man
• User Friendly - Stef Murky
• User Friendly - User Friendly community and the comment board
• User Friendly - Link of the day LOTD
• User Friendly - Bibliography
• User Friendly - Copyright

Read more here: » User Friendly: Encyclopedia - User Friendly

User Friendly characters are the characters that feature on the webcomic User Friendly. User Friendly characters - Main characters. User Friendly characters - A.J. Garrett. First Appearance: November 17, 1997 A.J. is the creative guy for the company, maintaining and designing their websites. As a web designer, he's uncomfortably crammed in that tiny crevasse between the techies and the marketing people. This means he's not disliked by anyone, but they ...

Including:

• User Friendly characters - Main characters
• User Friendly characters - A.J. Garrett
• User Friendly characters - The Chief
• User Friendly characters - Dust Puppy
• User Friendly characters - Erwin
• User Friendly characters - Greg Flemming
• User Friendly characters - Mike Floyd
• User Friendly characters - Miranda Cornielle
• User Friendly characters - Pitr Dubovich
• User Friendly characters - Sid Dabster
• User Friendly characters - Smiling Man
• User Friendly characters - Stef Murky
• User Friendly characters - Regular Characters
• User Friendly characters - Artur
• User Friendly characters - BSD Daemon
• User Friendly characters - Clippy
• User Friendly characters - Cobb
• User Friendly characters - Mr. Cola
• User Friendly characters - Crud Puppy
• User Friendly characters - Cthulhu
• User Friendly characters - Hillary
• User Friendly characters - Matt the Sea Urchin
• User Friendly characters - Pearl
• User Friendly characters - Tanya
• User Friendly characters - Tux
• User Friendly characters - Occasional Characters
• User Friendly characters - Guest Characters
• User Friendly characters - Copyright

Read more here: » User Friendly characters: Encyclopedia - User Friendly characters

Aerial topdressing is the spreading of fertilisers such as superphosphate over farm land. Aerial Topdressing was developed in New Zealand in the 1940s and was rapidly adopted elsewhere in the 1950s. For spraying of insecticides and fungicides, by air, see crop dusting, for more general information about agricultural aircraft see aerial application. History of aerial topdressing in New Zealand - Origins. History of aerial topdressing in New Zealand - Other Aerial Applications. Th ...

Including:

• History of aerial topdressing in New Zealand - Origins
• History of aerial topdressing in New Zealand - Other Aerial Applications
• History of aerial topdressing in New Zealand - Early Suggestions
• History of aerial topdressing in New Zealand - Alan Pritchard
• History of aerial topdressing in New Zealand - Doug Campbell
• History of aerial topdressing in New Zealand - The Royal New Zealand Air Force trials
• History of aerial topdressing in New Zealand - Reaserch in Other Nations
• History of aerial topdressing in New Zealand - Australia
• History of aerial topdressing in New Zealand - Great Britian
• History of aerial topdressing in New Zealand - The Supermen - private operators
• History of aerial topdressing in New Zealand - AirworkNZ
• History of aerial topdressing in New Zealand - Fieldair
• History of aerial topdressing in New Zealand - Wanganui Aero Work
• History of aerial topdressing in New Zealand - James Aviation
• History of aerial topdressing in New Zealand - The Aircraft
• History of aerial topdressing in New Zealand - War Surplus
• History of aerial topdressing in New Zealand - Existing designs
• History of aerial topdressing in New Zealand - Developing Specialist machines
• History of aerial topdressing in New Zealand - Pacific Aerospace
• History of aerial topdressing in New Zealand - The Mature Industry
• History of aerial topdressing in New Zealand - Environmental Impact
• History of aerial topdressing in New Zealand - Print media
• History of aerial topdressing in New Zealand - Web sites

Read more here: » History of aerial topdressing in New Zealand: Encyclopedia - History of aerial topdressing in New Zealand

A waterspout is a vortex that occurs over water. Classification systems vary. The United States National Weather Service considers all vortexes over water to be tornados regardless if they are associated with a thunderstorm. Waterspout - Types of Waterspouts. Waterspouts not associated with a thunderstorm may be called "fair weather waterspouts" and those from thunderstorms called "tornadic waterspouts". Fair weather waterspouts occur in coastal waters and are associated with weak developing storm sy ...

Including:

• Waterspout - Types of Waterspouts
• Waterspout - Nautical Threat

Read more here: » Waterspout: Encyclopedia - Waterspout

de_dust was amongst the first three defusion maps, released in Counter-Strike BETA 4 (11th May 1999) alongside de_prodigy and de_nuke. By the middle of 2000, de_dust had become the most-played CS map and later the most played map of any FPS, due to its style and simplicity, which appealed to new players. de_dust is quickly fading in competitive play for newer balanced and varied maps, but remains a he ...

See also:

De dust, De dust - de_dust, De dust - de_dust2, De dust - de_dust_pcg

Read more here: » De dust: Encyclopedia II - De dust - de_dust

How are the interstellar grains destroyed? There are some ultraviolet processes which lead to grain "explosions" (d'Hendecourt et al., 1985; Greenberg, 1976). Evans (1994) also describes evaporation, sputtering (when an atom or ion strikes the surface of a solid with enough momentum to eject atoms from it), and grain-grain collisions, which have a major influence on the grain size distribution, as well. These destructive processes happen in a variety of places. Some grains are destroyed in the supernovae/novae explosion (and then some ...

See also:

Cosmic dust, Cosmic dust - Introductory Material, Cosmic dust - Some bulk properties of cosmic dust, Cosmic dust - Radiative properties of cosmic dust, Cosmic dust - Dust grain formation, Cosmic dust - Dust grain destruction, Cosmic dust - Some dusty clouds in the universe

Read more here: » Cosmic dust: Encyclopedia II - Cosmic dust - Dust grain destruction

The dust that is collected is taken to a clean room. This room has filters to decrease the number of dust particles in the air. The room must have very few particles to avoid contaminating the samples. Space dust is then scanned by an electron microscope, after which the sample is sent to the NASA space dust library for storage. Currently, NASA can only catalog 300 particles a year. The difference between dust from Earth and dust from space is easily observed. Dust from Earth almost never has Iridium or Osmium, and dust from space has ...

See also:

Space dust, Space dust - Types, Space dust - Collection methods, Space dust - Airplanes, Space dust - Spacecraft, Space dust - Terrestrial collection, Space dust - Deep-sea collection, Space dust - Analysis, Space dust - Images

Read more here: » Space dust: Encyclopedia II - Space dust - Analysis

The large grains start with the silicate particles forming in the atmospheres of cool stars, and carbon grains in the atmospheres of cool carbon stars. Stars, which have evolved off the main sequence, and which have entered the giant phase of their evolution, are a major source of dust grains in galaxies. How do astronomers know that that dust is formed in the envelopes of late-evolved stars? They know from their observations. An observed (infrared) 9.7 micrometre emission silicate signature for cool evolved (oxygen-rich giant) stars. ...

See also:

Cosmic dust, Cosmic dust - Introductory Material, Cosmic dust - Some bulk properties of cosmic dust, Cosmic dust - Radiative properties of cosmic dust, Cosmic dust - Dust grain formation, Cosmic dust - Dust grain destruction, Cosmic dust - Some dusty clouds in the universe

Read more here: » Cosmic dust: Encyclopedia II - Cosmic dust - Dust grain formation

Dusts (Worldly Dusts)

A metaphor for all the mundane things that can cloud our bright Self-Nature.

These include form, sound, scent, taste, touch, dharmas (external opinions and views). These dusts correspond to the five senses and the discriminating, everyday mind (the sixth sense, in Buddhism).

 (See also: Dusts (Worldly Dusts, Buddhism, Body Mind and Soul)

The show is based on regular returning characters, along with one-time sketches. Monkey Dust - Season one. A consultancy company which is very morally dubious opens each show. The company charges large amounts of money to rebrand companies and other things, e. g. renaming cancer as "Closure" and advertising it as an attractive end-of-life option. The man who invents their new brand names is an international adventurer who looks like Lord Byron. The company's offices are in the shape of their logo, just like th ...

See also:

Monkey Dust, Monkey Dust - Characters, Monkey Dust - Season one, Monkey Dust - Season Two, Monkey Dust - Season three, Monkey Dust - Awards, Monkey Dust - Quotations

Read more here: » Monkey Dust: Encyclopedia II - Monkey Dust - Characters

Cosmic dust is dust grains and agreggates of dust grains. These particles are irregularly-shaped with porosity ranging from fluffy to compact. The composition, size, and other properties depends on where the dust is found. General diffuse interstellar medium dust should be distinguished from dust grains in dense clouds, which should be distinguished from planetary rings dust, which should be distinguished from circumstellar dust, and so on. For example, grains in dense clouds have acquired a mantle of ice and the average dimens ...

See also:

Cosmic dust, Cosmic dust - Introductory Material, Cosmic dust - Some bulk properties of cosmic dust, Cosmic dust - Radiative properties of cosmic dust, Cosmic dust - Dust grain formation, Cosmic dust - Dust grain destruction, Cosmic dust - Some dusty clouds in the universe

Read more here: » Cosmic dust: Encyclopedia II - Cosmic dust - Some bulk properties of cosmic dust

Cosmic Dust refers to particles in space which are assemblages of a few molecules to tenth-millimeter-sized grains. Cosmic dust can be further distinguished by its astronomical location; for example: interplanetary dust, interstellar dust, comet dust, circumplanetary dust. This article covers bulk and radiative properties of cosmic dust, the dust particles' origins, end-fates, and specific locations in space. Historically, cosmic dust used to be an annoyance to astronomers because of the way that the dust obscures the object th ...

See also:

Cosmic dust, Cosmic dust - Introductory Material, Cosmic dust - Some bulk properties of cosmic dust, Cosmic dust - Radiative properties of cosmic dust, Cosmic dust - Dust grain formation, Cosmic dust - Dust grain destruction, Cosmic dust - Some dusty clouds in the universe

Read more here: » Cosmic dust: Encyclopedia II - Cosmic dust - Introductory Material