[permalink] [id link]
* Sisyphus cooling, a cooling technique named after the Sisyphus myth
from
Wikipedia
Some Related Sentences
Sisyphus and cooling
* Sisyphus cooling
Temperatures well below the Doppler limit have been achieved with various laser cooling methods, including Sisyphus cooling, which allows to approach the lower so-called recoil limit.
An example of a process where the recoil temperature can be reached is Sisyphus cooling.
Sisyphus and after
Sisyphus was forcefully dragged back to Tartarus by Hermes when he refused to go back to the Underworld after that.
Soon after, Tyro married Sisyphus and had two children.
Aegina's father Asopus chased after them ; his search took him to Corinth, where Sisyphus was king.
Sisyphus and myth
The 1st-century BC Epicurean philosopher Lucretius interprets the myth of Sisyphus as personifying politicians aspiring for political office who are constantly defeated, with the quest for power, in itself an " empty thing ", being likened to rolling the boulder up the hill.
" The philosopher Richard Taylor uses the myth of Sisyphus as a representation of a life made meaningless because it consists of bare repetition.
" Painting the Forth Bridge " is a colloquial term for a never-ending task ( a modern rendering of the myth of Sisyphus ), coined on the erroneous belief that, at one time in the history of the bridge, repainting was required and commenced immediately upon completion of the previous repaint.
The folklore is very similar to Greek myth of Sisyphus
cooling and technique
One technique used to reach very low temperatures ( thousandths and even millionths of a degree above absolute zero ) is adiabatic demagnetisation, where the change in magnetic field on a magnetic material is used to provide adiabatic cooling.
This technique involved molten zirconia being contained within a thin shell of still-solid zirconia, with crystal growth from the melt: The process was named cold crucible, an allusion to the system of water cooling used.
In exertional heat stroke, studies have shown that although there are practical limitations, cool water immersion is the most effective cooling technique and the biggest predictor of outcome is degree and duration of hyperthermia.
It is also possible to use ablative materials in place of the active cooling systems, thereby reducing the complexity, but it appears this relatively modern technique has not been applied to the expanding nozzle technology in known systems.
The name and inspiration come from annealing in metallurgy, a technique involving heating and controlled cooling of a material to increase the size of its crystals and reduce their defects.
This technique allows cooling of ions and atoms that cannot be laser cooled directly.
Magnetic evaporative cooling is a technique for lowering the temperature of a group of atoms.
This technique has been used for many years in cryogenic systems for producing further cooling in systems already cooled to temperatures of 4 K and lower.
The process of supercooling requires that water be pure and free of nucleus such as having undergone reverse osmosis, however the cooling itself does not require any specialised technique.
Peltier elements are a common component in thermal cyclers, used for the synthesis of DNA by polymerase chain reaction ( PCR ), a common molecular biological technique which requires the rapid heating and cooling of the reaction mixture for denaturation, primer annealing and enzymatic synthesis cycles.
His technique relied less on the heating and cooling, and more on the quenching process of rapidly cooling the molten steel when the right crystal structure had formed within.
Analysis of copper found during excavations showed that it had been annealed, a technique involving repeatedly heating and cooling the metal as it is worked, such as blacksmiths do with iron.
In 1997 he won the Nobel Prize in Physics ( together with Claude Cohen-Tannoudji and Steven Chu ) for his contributions to laser cooling ( and especially for his invention of the Zeeman slower ), a technique to slow the movement of gaseous atoms in order to better study them, at the National Institute of Standards and Technology.
Van der Meer invented the technique of stochastic cooling of particle beams.
Another local chip cooling technique is jet impingement cooling.
His apparatus for the liquefaction of air combined the cooling effect achieved by allowing a compressed gas to expand ( the Joule-Thomson effect first observed by James Prescott Joule and Lord Kelvin ) with a counter-current heat exchange technique that used the cold air produced by expansion to chill ambient air entering the apparatus.
Magnetic evaporative cooling is a technique for lowering the temperature of a group of atoms.
Resolved sideband cooling is a laser cooling technique that can be used to cool strongly trapped atoms to the quantum ground state of their motion.
These discoveries and a new technique for cooling particles led to a Nobel Prize for Carlo Rubbia and Simon van der Meer in 1984.
This technique is known as evaporative cooling.
cooling and named
On September 27, 1993 the cryogenic cooling system of the Tevatron Accelerator was named an International Historic Landmark by the American Society of Mechanical Engineers.
Heat lightning was named because it often occurs on hot summer nights and to distinguish it from lightning accompanied by audible thunder and cooling rainfall at the point of observation.
The 2. 3 L engine, named Dura-built 140, received improved cooling and durability refinements, and a five years / 60, 000 mile warranty.
Another New Jersey-based band named The Number Twelve Looks Like You mentions Quick Chek coffee in their song " The Garden's All Nighters " from the album Worse Than Alone with the line of lyrics ; " Quick Chek coffee is cooling down.
In Australia, it is still known as the main ingredient of an old-fashioned but cooling summer drink named ' hock, lime and lemon '.
* Thomson effect, named for William Thomson, 1st Baron Kelvin, which is the heating or cooling of a current-carrying conductor when a temperature gradient is present
cooling and after
From 1944 to 1971, pump systems drew cooling water from the river and, after treating this water for use by the reactors, returned it to the river.
Instruments on Galileo detected a fireball which reached a peak temperature of about 24, 000 K, compared to the typical Jovian cloudtop temperature of about 130 K, before expanding and cooling rapidly to about 1500 K after 40 s. The plume from the fireball quickly reached a height of over 3, 000 km.
Eventually, after cooling her anger, she too seeks the help of Enki, as spokesperson of the " assembly of the gods ", the Igigi and the Anunnaki.
Ice core records show that before the Holocene there was global warming after the end of the last ice age and cooling periods, but climate changes became more regional at the start of the Younger Dryas.
This may result in drowning or hypothermia, but the rapid cooling can also create a state in which someone can be revived up to hours after having fallen in the water.
Quenching is the process of cooling a high-carbon steel very quickly after you have heated it, thus " freezing " the steel's molecules in the very hard martensite form, which makes the metal harder.
Pasteurization ( or pasteurisation, see spelling differences ) is a process of heating a food, which is usually a liquid, to a specific temperature for a predefined length of time and then immediately cooling it after it is removed from the heat.
The cumulative cooling and warming that result from the tilt of the planet become most pronounced after the solstices, leading to the more recent custom of using them to mark the beginning of summer and winter in most countries of Central and Northern Europe, as well as in Canada, the USA and New Zealand.
It proved to be a complex design, with liquid cooling and oil cooling, and multiple lubrication and carburetor systems, these last gave problems, solved after the first series units.
Later, Guenter Wendt, pad leader for the early American manned space launches, wrote that he believed a small cover over the external release actuator was accidentally lost sometime during the flight or splashdown and the T-handle may have been tugged by a stray parachute shroud line, or was perhaps damaged by the heat of re-entry and after cooling upon splashdown, contracted and fired.
The Little Ice Age ( LIA ) was a period of cooling that occurred after the Medieval Warm Period ( Medieval Climate Optimum ).
A small amount is boiled with the wort, attracting proteins and other solids, which is then removed from the mixture after cooling.
They wrote open letters acknowledging their mistakes and were readmitted to the Communist Party after a six month cooling off period.
They wrote open letters acknowledging their mistakes and were readmitted to the Communist Party after a six-month cooling off period.
Dissolution of the cloud can occur when the process of adiabatic cooling ceases after the passage of a weather disturbance or following the loss of daytime heating of the lower troposphere.
Because of the very short period in which Big Bang nucleosynthesis occurred before being stopped by expansion and cooling ( about 20 minutes after the Big Bang ), no elements heavier than beryllium ( or possibly boron ) could be formed.
Temperature sensitivity varies, but when a magnet is heated to a temperature known as the Curie point, it loses all of its magnetism, even after cooling below that temperature.
Usually, boiled soybean pods are served after cooling or freezing, but they also may be served hot.
Although the sun is at the same altitude 6-weeks before and after the solstice, the heating and cooling requirements before and after the solstice are significantly different.
To prepare the tea, chrysanthemum flowers ( usually dried ) are steeped in hot water ( usually 90 to 95 ° C after cooling from a boil ) in either a teapot, cup, or glass.
This confusion was a key contributor to the initial failure to recognize the accident as a loss-of-coolant accident, and led operators to turn off the emergency core cooling pumps, which had automatically started after the PORV stuck and core coolant loss began, due to fears the system was being overfilled.
1.221 seconds.