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Topic: Fog


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 Fog - Wikipedia, the free encyclopedia
Fog is particularly hazardous at airports, where some attempts have been made to develop methods (such as using heating or spraying salt particles) to aid fog dispersal.
Salt fog (or salt-fog) is characteristic of coastal atmospheres; the water droplets of this form of fog, formed by evaporated seawater, carry in solution microscopic particles of salt.
Artificial fog is artificially generated fog that is usually created by vaporizing a water and glycol-based or glycerine-based fluid.
en.wikipedia.org /wiki/Fog   (950 words)

  
 BBC - Weather Centre - Features - Understanding Weather - Fog
Fog is a common problem here in the UK as we have four different types: radiation fog, advection fog, hill fog and coastal fog.
After dawn, fog tends to disperse because it is 'burnt off' by the incoming solar radiation, some of which penetrates the fog and reaches the ground.
Hill fog or upslope fog, as its name implies, is formed as mild moist air is forced to ascend a hill or mountain range.
www.bbc.co.uk /weather/features/understanding/fog.shtml   (809 words)

  
 Ned Kahn: Portfolio: Fog
Fog emerges from the armature and from under a circular bench, creating a cool oasis and revealing the ebb and flow of the wind.
The vortex was made visible by fog pumped thro ‚ugh the floor and illuminated by a combination of natural light and electronically controlled lights that slowly cycled through various colors.
Dense fog swirls down into a large funnel-shaped chamber set into the floor of the new planetarium and forms a vortex suggestive of a spiral galaxy.
www.nedkahn.com /fog.html   (567 words)

  
 advection fog - Hutchinson encyclopedia article about advection fog   (Site not responding. Last check: 2007-10-22)
Advection fog occurs when two currents of air, one cooler than the other meet, or by warm air flowing over a cold surface.
Radiation fog forms through rapid heat loss from the land, causing condensation to take place and a mist to appear.
Fog formed by warm moist air meeting a cold ocean current or flowing over a cold land surface.
encyclopedia.farlex.com /advection+fog   (146 words)

  
 USATODAY.com   (Site not responding. Last check: 2007-10-22)
Advection fog forms when humid air flows over cold ground or water.
Steam fog forms over water, often in the fall.
Often, the winter sun is not strong enough to evaporate the fog during the day.
www.usatoday.com /weather/wfog.htm   (432 words)

  
 BoatUS.com: Trailering Club Plus!
Fog is a three-letter word for trouble and history proves this point all too well.
One way to predict fog is by watching the temperature and the dew point (both are given in weather segments on the radio and TV.
Fog is most prominent along the Pacific coastline (Los Angeles and south from September through February and north of L.A. from July through October).
www.boatus.com /trailerclub/upkeep/fog.asp   (1154 words)

  
 Gamasutra - Features - "Volumetric Rendering in Realtime" [10.03.01]
Fog is a cloud of water vapor consisting of millions of tiny particles floating in space.
An alternative way to create fog is to model a polygonal hull that represents the fog, and to compute the area of fog for each pixel rendered on the scene.
However, the shaft of fog along a ray can be closely approximated subtracting the w depth a ray enters a fog volume from the w depth of the point it leaves the volume, and multiplying by some constant.
www.gamasutra.com /features/20011003/boyd_01.htm   (723 words)

  
 Maui Fog Research
Despite the extremely high rainfall in the area, evidence from previous studies (Juvik and Ekern, 1978; Scholl et al., 2002) indicates that fog may be a substantial part of the water budget of these forests, especially at altitudes between 600 and 2000 meters.
Fog is the major source of moisture during much of the year, as rainfall occurs mostly during large winter storms.
Samples of fog, rain, soil water, tree sap, (and stream water at the windward site) were collected for stable isotopes, and amounts of fog and rain precipitation and throughfall were measured.
water.usgs.gov /nrp/proj.bib/hawaii/maui_fog.htm   (1119 words)

  
 Rosco UK : Technotes : Fog : Workings
The use of a fog fluid that was composed of water and glycols was heralded by the industry with an award in technical achievement from the Academy of Motion Picture Arts and Sciences.
Fog fluids used in these processes are made from a series of glycols mixed with water.
When fog is constricted, it tends to recondense into fluid reducing the output and creating an unwanted residue.
www.rosco.com /uk/technotes/fog/how_mach_work.asp   (1938 words)

  
 1.3 Fog harvesting
Fog harvesting efficiencies were found to be highest during the spring and summer months, and lowest during the winter months.
Thus, a minimum fog season duration of half a year might serve as a guideline when considering the feasibility of using this technology for water supply purposes; however, a detailed economic analysis to determine the minimum duration of the fog season that would make this technology cost-effective should be made.
Caution is required to minimize impacts on the landscape and the flora and fauna of the region during the construction of the fog harvesting equipment and the storage and distribution facilities.
www.oas.org /osde/publications/Unit/oea59e/ch12.htm   (3838 words)

  
 BBC - Weather Centre - Features - Weather Basics - Fog
Fog forms in many different ways, but generally the air near the ground can hold its moisture for longer, so water droplets condense to form fog.
Fog usually clears soon after dawn as the sun heats up the air again, allowing it to hold more moisture.
This 'Advection' fog often forms by the coast, especially in spring and summer when there is a greater difference between the temperatures of the sea and land.
www.bbc.co.uk /weather/features/weatherbasics/fog.shtml   (442 words)

  
 FOG
Fog is so common along the Northeast coast that we all learn to handle it or else we are forced to spend many days in harbor.
Fog is a common cause of restricted visibility.
If you are near an area of restricted visibility, such as a fog bank, the Rules require the proper fogsigs to be sounded.
seacanoe.org /fog.htm   (1277 words)

  
 Natural Hazards.org: Investigate: Fog
Fog is responsible for an average of over $1 million in property damage, dozens of injuries, and several deaths every year in the United States.
Fog is classified based on how it forms, which is often related to where it forms.
This type of fog is common in harbors and bays in the summer, such as the San Francisco Bay in California.
www.naturalhazards.org /investigate/fog   (848 words)

  
 The Gnomon Workshop - Simple Fog
In the case of simple fog attributes, the clipping distance can be adjusted as well as the height, saturation point and color.
When examining the fog layout in the Hypershade notice that the envFogMaterial is connected as a Volume Material.
Additionally, a Fog Near/Far value clips the start of the fog to be a few units from the camera with the Saturation Distance also a few units from camera.
www.thegnomonworkshop.com /tutorials/simple_fog/simple_fog.html   (718 words)

  
 VClassics Interactive - Archive
Fog is defined as a thick cloud of water droplets, 0.00039 to 0.00156 inches in diameter, suspended in the atmosphere at or near the earth's surface and reducing visibility to below half a mile.
And if fog lights are mounted in an air dam and you drive across the desert a lot, they get essentially sand blasted and all the little pits affect the flow of light and the light pattern.
Another important consideration when mounting fog lights is that they be mounted rigidly, so the beam stays pointed the way it's aimed, as opposed to dancing over tar strips on the road and the like.
www.vclassics.com /archive/lightprn.htm   (2179 words)

  
 Carl Sandburg | Comments about "Fog" | poetry archive | plagiarist.com
Fog moves on, just like life does, i think that he was comparing the poem to life.
I also feel that the poet isn't referring to the fog when he writes "It sits looking over harbour and city on silent haunches and then moves on" I beleive that he is referring to the cat watching the city.
For one thing, no cat is mentioned in the poem, only the fog which is being compared to a cat and which is the subject of the poem.
plagiarist.com /poetry/4679/comments   (644 words)

  
 Fog Rugby | Home of the San Francisco Fog R.F.C.
The San Francisco Fog R.F.C. is the first rugby club in the western United States established to invite members from traditionally under-represented groups, particularly men of color and gay men, to engage in the world's third most popular team sport.
The Fog will be sponsoring a Beer Bust at 440 Castro, from 5pm to 9pm.
The Fog wanted their B side players to get more game time; the whole club is preparing for the Bingham Cup in New York in May.
sffog.org   (846 words)

  
 Fog   (Site not responding. Last check: 2007-10-22)
Fog occurs when the air near the ground is saturated and condensation occurs on tiny particles suspended in the air.
Fog is classified by the dominant formation process and exists as long as processes continue to maintain saturated conditions.
Radiational fog, or ground fog, occurs at night or in the morning when radiational cooling has cooled the air down to the dew-point temperature, or simply, the dew point.
www.cimms.ou.edu /~cortinas/1014/l12_3.html   (342 words)

  
 Fog   (Site not responding. Last check: 2007-10-22)
In a hilly area, the cool air settles into the valleys and therefore fog forms in the valleys while hilltops may be clear.
Although you could argue that if there are light winds over both a flat and hilly area, the winds could prevent fog formation in the flat area, but fog could still form in one of the valleys of the hilly area that are sheltered from the wind.
This type of fog forms exclusively in areas of sharp upslopes, such as the area around Los Angeles, or the eastern slope of the Rockies.
www.newton.dep.anl.gov /newton/askasci/1993/general/GEN022.HTM   (409 words)

  
 Franklin's Forecast - Fog   (Site not responding. Last check: 2007-10-22)
Fog is a cloud based on the ground, rather than in the atmosphere.
Fog forms when there is a lot of moisture near the ground, or when the air near the ground cools to the dew point.
The temperature to which air must be cooled in order for the water vapor in the air to condense into liquid water is known as the dew point.
www.fi.edu /weather/events/fog.html   (103 words)

  
 Fog
According to Earth & Sky, a fog is a cloud that touches the ground.
Advection fog forms when the wind blows moist air over cool ground or warm air passes over a snowpack.
Fog harvesting has the potential of providing an alternative source of freshwater in otherwise dry regions.
www.suite101.com /article.cfm/science_surfing/116259   (302 words)

  
 dryiceInfo.com Fog
There will be far less fog for the next 5 to 10 minutes as the water cools down and the volume of Dry Ice diminishes.
A theater fog machine is generally a 30 to 55-gallon metal or plastic water barrel with a 110-volt or a 220-volt hot water heater to keep the water hot.
The resulting water vapor fog is gently blown by a fan and directed to the desired area by an air duct tube.
www.dryiceinfo.com /fog.htm   (1810 words)

  
 Amazon.com: Fog (1979) : Video   (Site not responding. Last check: 2007-10-22)
It is a fog that enshrouds of the ghosts of those whose ship was lured to the rocky coast, only to find itself dashed to bits on the rocks, causing all aboard to plummet to the nether regions of Davy Jones' locker.
I originally saw this film in the theatre when it was first released and still remember the effectiveness of the fog rolling across the huge silver screen and the pulse pounding, musical score, which was such an excellent accompaniment to the film.
Needless to say, Carpenter is a master -- and "The Fog" takes this basic idea of fear in the shadows and spins an intelligent, well-crafted story of betrayal, revenge, and some of the creepiest ghosts to be found onscreen in recent memory.
www.amazon.com /exec/obidos/tg/detail/-/6305074194?v=glance   (897 words)

  
 Atmosphere - Clouds - Instructor
Fog is defined as a visible moisture that begins at a height lower than 50 feet.
Fog forms and is carried by the westerly over the land.
The opposite of fog, in terms of altitude, are cirrus clouds.
wings.avkids.com /Book/Atmosphere/instructor/clouds-01.html   (988 words)

  
 The Gnomon Workshop - Controlling Fog Density
In nature, fog consists of water vapor yet in Maya you may use 'fog' to also represent dust, smoke, air, smog, plasma, nebulae or even magical glows and spells.
To be able to yield such a variety of effects from fog, one must have a clear understanding of the volume shader associated with it.
The 'fog' exists as a volume rendering of the interior of this spherical or conical shape.
www.thegnomonworkshop.com /tutorials/fog_density/fog_density.html   (1430 words)

  
 Cultural r/k Selection
The preferred music style of a culture has been found to be highly correlated with the social structure (Lomax [17]), and this correlation is particularly striking when we look at the regal/kalyptic characteristics of a society.
I have observed that many aspects of culture are connected to this cultural r/k-scale (Fog [14]), although no large scale statistics have been made yet.
The reader is referred to (Fog [14]) for a more detailed discussion of how the r/k-dimension is reflected in different areas of culture.
jom-emit.cfpm.org /1997/vol1/fog_a.html   (6671 words)

  
 OpinionJournal - Leisure & Arts
And yet if any city were to ban fake fog, it would likely be the one by the Bay.
Fog is actually a fairly old issue in opera.
I know serious-minded singers who say that fake fog is a real problem; I know others who roll their eyes at the idea.
www.opinionjournal.com /la/?id=110002758   (902 words)

  
 FOG - Flexible Object Generator
FOG offers preprocessing facilities using meta-object concepts that integrate with the C++ language.
FOG renders the C preprocessor obsolete, eliminates substantial lexical redundancy from C++ and generalises C++ so that patterns can be realised by using meta-functions.
This descibes the superset grammar approach adopted by FOG version 2, which is now available in experimental form and superseded the multi-pass approach which was made available in 1999.
www.computing.surrey.ac.uk /research/dsrg/fog   (518 words)

  
 FOG HEAVEN / The sun will come out tomorrow. Or maybe not. It's summer in the city, and that means gray skies.
The fog is such a part of the area that it has become part of the literature of San Francisco.
As every schoolchild knows, the summer fog is caused when the sun heats the Sacramento and San Joaquin valleys, which draws in the cool marine air from the Pacific Ocean.
The most famous spot for fog in sporting history is the ballpark at Candlestick Point, where the fog and wind nearly drove the San Francisco Giants out of town.
sfgate.com /cgi-bin/article.cgi?file=/c/a/2005/08/19/MNGOBEA9JI1.DTL   (1388 words)

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