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Author Topic: A-Z of AVIONICS  (Read 448575 times)

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #150 on: 14/11/2006 07:19:11 »
Kirkwood gaps; Regions in the belt of Asteroids between mars and Jupiter in which almost no asteroids move.
 

Offline lgic

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Re: A-Z of AVIONICS
« Reply #151 on: 14/11/2006 15:54:53 »
L
Ligand gated ion channel

Proteins that span the extracellular membranes of cells, especially neurons and muscle. The protein contains a pore that is opened when it binds ligand (usually a neurotransmitter). When the pore opens, it makes a channel connecting the inside of the of cell with whatever is outside the cell. Ions can cross into or out of the cell, depending on their concentration gradients, the voltage, and the ionic selectivity of the pore, and the result is chemical communication. Examples are nicotinic acetylcholine receptors, GABA receptors, glycine receptors and some serotonin receptors.
 

Offline science_guy

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Re: A-Z of AVIONICS
« Reply #152 on: 14/11/2006 16:08:02 »
mars
 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #153 on: 14/11/2006 16:23:24 »
Nanotechnology- Technology on the molecular scale.
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #154 on: 14/11/2006 16:43:35 »
Oscilloscope


An oscilloscope (sometimes abbreviated CRO, for cathode-ray oscilloscope, or commonly just scope or O-scope) is a piece of electronic test equipment that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis)



A Tektronix model 475A portable analogue oscilloscope, a very typical instrument of the late 1970s. This dual-trace, dual-sweep instrument had a horizontal bandwidth of 250 MHz, a maximum vertical sensitivity of 5 mV per division, and maximum (unmagnified) horizontal sweep speed of 10 ns per division. The vertical controls are on the left with Channel 1 above and Channel 2 below. The horizontal sweep controls are on the right with the Main Trigger above and the Delayed Trigger below. The CRT controls are below the screen. The metal loop to the lower right of the screen provided a calibration signal for voltage and current probes.



 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #155 on: 14/11/2006 17:24:24 »
Prokaryote-A single-celled organism with no distinct nucleus.
 

Offline iko

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Re: A-Z of AVIONICS
« Reply #156 on: 14/11/2006 21:06:48 »
Quasar...
...don't ask ME!

ikod most of the time
« Last Edit: 23/06/2007 21:33:08 by iko »
 

Offline Mjhavok

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Re: A-Z of AVIONICS
« Reply #157 on: 14/11/2006 22:36:34 »
Ribonucleic Acid
 

Offline iko

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Re: A-Z of AVIONICS
« Reply #158 on: 14/11/2006 23:08:19 »
von Szent-gyorgy Albert
Nobel Prize in Physiology or Medicine 1937
"For his discoveries in connection with
the biological combustion processes,
with special reference to vitamin C
and the catalysis of fumaric acid"

ikod
 
« Last Edit: 23/06/2007 21:33:46 by iko »
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #159 on: 15/11/2006 00:04:47 »
Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. Usually, they are used for feeding, feeling and grasping. Anatomically, they work like other muscular hydrostats.



Cuttlefish with 2 tentacles and 8 arms





Leaf and tentacle movement on D. capensis
 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #160 on: 15/11/2006 05:34:57 »
NICE PHOTO!

UMBRA: (1) The dark inner portion of a sunspot. (2) The maincone of a shadow cast by a planet or the moon.
 

Offline iko

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« Last Edit: 23/06/2007 21:34:21 by iko »
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #162 on: 15/11/2006 15:32:45 »
Wikipedia is a multi-lingual, Web-based free content encyclopedia project. The name Wikipedia is a portmanteau of the words wiki and encyclopedia. Wikipedia is written collaboratively by volunteers, allowing most articles to be changed by almost anyone with access to the Web site. Wikipedia's main servers are in Tampa, Florida, with additional servers in Amsterdam and Seoul.

Wikipedia was launched as an English language project on January 15, 2001, as a complement to the expert-written and now defunct Nupedia, and now is operated by the non-profit Wikimedia Foundation. It was created by Larry Sanger and Jimmy Wales; Sanger resigned from both Nupedia and Wikipedia on March 1, 2002. Wales has described Wikipedia as "an effort to create and distribute a multi-lingual free encyclopedia of the highest possible quality to every single person on the planet in their own language".[1]



 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #163 on: 15/11/2006 15:34:20 »
X-band

A band of radio frequencies extending from 5200 to 10 900 MHz
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #164 on: 15/11/2006 15:37:52 »
The Y chromosome is the sex-determining chromosomes in humans and most other mammals. In mammals, it contains the gene SRY, which triggers testis development, thus determining maleness.




 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #165 on: 15/11/2006 15:58:34 »
Zodiacal constellations:The 12 constellations used in astrology.
 

Offline Mjhavok

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Re: A-Z of AVIONICS
« Reply #166 on: 15/11/2006 16:45:15 »
Alpha Helix



 

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Re: A-Z of AVIONICS
« Reply #167 on: 15/11/2006 17:16:27 »
Cool!

Big Crunch-A possible future reversal of the big bang.
 

Offline iko

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« Last Edit: 23/06/2007 21:34:59 by iko »
 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #169 on: 16/11/2006 03:34:47 »
Doppler shift-The "police siren" effect,when waves propagated by a moving body have their wavelength stretched as the body moves away.
 

Offline Mjhavok

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Re: A-Z of AVIONICS
« Reply #170 on: 16/11/2006 11:33:21 »
Endotoxin or Exotoxin
 

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Re: A-Z of AVIONICS
« Reply #171 on: 16/11/2006 16:27:53 »
Flocculi: Patches on the suns surface based on the principal of the spectrascope. Bright Flocculi are composed of calcium, dark flocculi are made up of hydrogen.
 

Offline iko

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Re: A-Z of AVIONICS
« Reply #172 on: 16/11/2006 19:13:42 »
GVHD - Graft Versus Host Disease 

acute and chronic reactions of donor's
T-lymphocytes against recipient's cells:
skin, gut, liver, CNS, eyes...

It could be easily prevented by removing
T-lymphocytes from the stem cell graft...
but if you do that, the probability of
either recurrence of leukemia or graft failure
increases significantly.

A new debilitating disease seems to keep
stalling the previous ailment.


ikod
« Last Edit: 23/06/2007 21:35:48 by iko »
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #173 on: 16/11/2006 19:51:01 »
Helioseismology

The study of the Sun's interior by measuring oscillations (ripples) as they appear at the surface. The oscillations are caused by sound waves that originate at different depths inside the Sun. By measuring their travel times and the distance they travel, scientists can study conditions in the Sun's interior.
 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #174 on: 17/11/2006 06:32:14 »
Ionosphere: The region above the stratasphere,from about 65 miles up to about 800 kilometres. Ionization  of the atoms in this region produces layers which reflect radio waves , making long-range communication over the earth possible. Solar events have effects upon the ionosphere, and produce ioospheric storms;on occasion, radio communication is interrupted.(Phiips Atlas Of The Universe Sir Patrick Moore )
 

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Re: A-Z of AVIONICS
« Reply #174 on: 17/11/2006 06:32:14 »

 

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