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General Science
General Science
A-Z of AVIONICS
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A-Z of AVIONICS
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Karen W.
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Re: A-Z of AVIONICS
«
Reply #740 on:
16/06/2007 07:13:04 »
Hydrocarbons =
A compound such as methane that contains only hydrogen and carbon atoms.
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Re: A-Z of AVIONICS
«
Reply #741 on:
16/06/2007 07:18:20 »
I
am a
J
olly beaver
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Reply #742 on:
16/06/2007 08:02:30 »
(
KNOWLEDGE
is a
WEALTH
all of it's
OWN
)
KINETIC =To do with Movement as in "kenetic sculpture race"(from my home town)
Kinetic Sculpture Race
The Osgood File (CBS Radio Network): 11/27/03
The Osgood File (CBS Radio Network): 6/25/03
Human powered works of mobile art compete in a race each spring.
The sculptures that competed in the April 2003 Kinetic Sculpture Race are designed to travel on land, through mud and over deep harbor waters, and they are constructed of any imaginable material, including used bicycles, gears, feathers, tin foil and paper mache. Some of the machines are simple crafts piloted by only one brave soul, while others might be as large as 50-foot long, highly sophisticated and well-engineered vehicles powered by a team of pilots. This year 32 entries, including a 14-foot green frog, a 14-foot powder blue elephant and a mobile volcano will compete for prizes in "Art" and "Engineering" categories, as well as the coveted "Mediocre" and "Next to Last" awards.
Art meets engineering at the Kinetic Sculpture Race, which provides an opportunity for anyone to build and race an imaginative work of art. The race started inauspiciously when Hobart Brown, an art dealer and sculptor, was repairing his son's tricycle in 1969. "It was an accident. I didn't know the world was hungry for this kind of thing. I was repairing my son’s tricycle, and I kept building stuff on it and pretty soon it was seven feet tall. And it got in the newspaper and my friend built one (another kinetic sculpture) and we had a race and it (the competition) grew and grew. And I thought, oh my God, now we need to do it right." The race grew into an annual three-day event in Northern California, from Arcata to Ferndale during Memorial Day weekend each year, over a 38-mile route of road, water, sand and mud. Since then, Hobart, known as the "Glorious Founder," has taken his "festival of art and madness" to Baltimore, as well as Boulder, Colorado, Portland Oregon, Port Townsend, Washington and even Poland and Australia.
CONTACTS
Humboldt Kinetic Association
PO Box 4227
Arcata, CA 95518
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Last Edit: 16/06/2007 08:10:57 by Karen W.
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Re: A-Z of AVIONICS
«
Reply #743 on:
16/06/2007 08:08:26 »
Bloody
L
Karen! [:0]
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Re: A-Z of AVIONICS
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Reply #744 on:
16/06/2007 08:13:59 »
MULTIPLE PERSONALITY DISORDER
[
]
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«
Reply #745 on:
16/06/2007 08:20:43 »
Olivia
N
eutron-bomb [
]
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Re: A-Z of AVIONICS
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Reply #746 on:
16/06/2007 08:28:24 »
ORGANIC CHEMISTRY
Organic chemistry
From Wikipedia, the free encyclopedia
Jump to: navigation, search
http://en.wikipedia.org/wiki/Organic_chemistry
Organic chemistry is a specific discipline within chemistry which involves the scientific study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of chemical compounds consisting primarily of carbon and hydrogen, which may contain any number of other elements, including nitrogen, oxygen, halogens as well as phosphorus, silicon and sulfur.[1][2]
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Last Edit: 16/06/2007 10:32:56 by Karen W.
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Re: A-Z of AVIONICS
«
Reply #747 on:
16/06/2007 18:25:04 »
P
soralens
http://www.planet-science.com/about_sy/news/ps_151-175/175/parsnips.jpg
http://www.itmonline.org/image/vitiligo1.gif
“Psoralens are part of a group of plant compounds referred to as furocoumarins. These are predominantly found the umbelliferae family, which includes celery, parsnips, fennel and parsley. Psoralens form part of the plants’ natural defence system and although they’re safe at low levels, their concentrations increase when the plants are damaged, attacked by fungi (mould), or when exposed to extreme temperatures."
The compounds are absorbed into the skin on contact, and they also end up in the skin after being ingested. Not that you would notice… until you went out into the sun, that is. Psoralens are partial to UV-A radiation, and have the
amazing ability to absorb three times as much light energy compared to their ground state
– and when they release this energy again, the trouble starts. Photochemical reactions take place which damage to the
body’s cell membranes and DNA
, causing inflammation and blisters, a condition medically referred to as “phytophotodermatitis”. In other words, victims end up with the equivalent of
pretty bad sunburn
. And because of the DNA damage, there is also an increased cancer risk (as there is with sunburn).
Don’t let this put you off your veg though – you’d have to eat large amounts of mouldy celery to run any serious risk of blistering up while out on the football pitch. The people most at risk from phytophotodermatitis are agricultural workers and food handlers who are exposed to these compounds on a near-daily basis.
Dangerous though they can be, psoralens can also be put to very positive use, by means of a
therapeutic application called ‘PUVA’. Psoralen + UV-A therapy
can help certain difficult-to-treat skin conditions, such as psoriasis, eczema and vitiligo. The psoralens are applied topically to the affected skin areas or, in more severe cases affecting large areas of the body, they are given orally. The patients are then exposed to UV-A light, and this can help to clear up the condition. The medical team take care not to burn the patients, of course. In vitiligo, the condition Michael Jackson has claimed to suffer from, where the skin’s natural pigment (melanin) is lost, PUVA therapy can help re-pigment the skin. The word of warning though is that during PUVA therapy, patients are advised not to consume psoralen-containing foods in excess.
more from:
http://www.scienceyear.com/about_sy/news/ps_151-175/ps_issue175.html
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Last Edit: 16/06/2007 18:30:25 by iko
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Re: A-Z of AVIONICS
«
Reply #748 on:
16/06/2007 19:33:41 »
QUANTUM ELECTRODYNAMICS =
A theory that describes both wave and particle behavior of electromagnetic radiation.
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Re: A-Z of AVIONICS
«
Reply #749 on:
19/06/2007 06:11:32 »
Recombination =
The shuffling of genetic information during the creation of reproductive cells that make offspring different from their parents.
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Re: A-Z of AVIONICS
«
Reply #750 on:
25/06/2007 10:13:26 »
SPREADING CENTER =
A SITE WHERE OCEANIC CRUST IS BEING FORMED!
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Re: A-Z of AVIONICS
«
Reply #751 on:
28/06/2007 23:19:20 »
TOPOLOGY =
Branch of mathematics that is concerned with surface properties that do not change under distortion.
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Re: A-Z of AVIONICS
«
Reply #752 on:
12/07/2007 22:45:07 »
Uncostate =
having only one main rib: said of a leaf.
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Re: A-Z of AVIONICS
«
Reply #753 on:
18/07/2007 22:01:27 »
V
ein
Cross section of a vein showing a valve which prevents backflow
In the circulatory system, a vein is a blood vessel that carries blood toward the heart. The majority of veins in the body carry low-oxygen blood from the tissues back to the heart; the exceptions being the pulmonary and umbilical veins which both carry oxygenated blood.
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Re: A-Z of AVIONICS
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Reply #754 on:
18/07/2007 22:13:09 »
White dwarf =
any of a class of small, extremely dense stars of low luminosity, often no larger then the earth but weighing as much as the sun.
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Re: A-Z of AVIONICS
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Reply #755 on:
18/07/2007 22:32:09 »
Z
ebu
, common name for several breeds of domesticated humped cattle native to southern Asia. A large, muscular hump on the back above the shoulders is its most conspicuous characteristic. Most zebus have short horns, pendulous ears, and huge dewlaps. The animals are used extensively in Africa and Asia as beasts of burden, and for their milk and flesh. White bulls are regarded as sacred by certain sects of Hindus; hence the entire species is known in some parts of the world as Brahman cattle.
Because the zebu is highly resistant to heat and tropical diseases, it has been introduced into the United States and South America for cross-breeding with native cattle to develop strains with similar qualities.
A Zebu doing what Zebus do best..............being a Zebu !!
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Re: A-Z of AVIONICS
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Reply #756 on:
18/07/2007 22:33:39 »
ooops...i missed out
'X'
and
' Y '
............oh well..I'm forgiven..I'm out of practice !! [
]
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Re: A-Z of AVIONICS
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Reply #757 on:
18/07/2007 22:43:19 »
Yes you Are Forgiven.. Definitely out of Practice! LOL
Lets start over!
ARTERIAL SCLEROSIS:
arteriosclerosis, arterial sclerosis, hardening of the arteries, induration of the arteries, coronary-artery disease
sclerosis of the arterial walls
«
Last Edit: 18/07/2007 22:55:01 by Karen W.
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Re: A-Z of AVIONICS
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Reply #758 on:
18/07/2007 23:31:24 »
B
rain
In animals, the brain or encephalon (Greek for "in the head"), is the control center of the central nervous system, responsible for behaviour. In most animals, the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, equilibrioception (balance), sense of acceleration, taste, and olfaction. While all vertebrates have a brain, most invertebrates have either a centralized brain or collections of individual ganglia. Primitive animals such as sponges do not have a brain at all. Brains can be extremely complex. For example, the human brain contains more than 100 billion neurons, each linked to as many as 10,000 other neurons.
Animation showing the human brain with the lobes highlighte
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Re: A-Z of AVIONICS
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Reply #759 on:
19/07/2007 02:29:52 »
Cerebral Cortex
From Wikipedia, the free encyclopedia
The cerebral cortex is a structure within the vertebrate brain with distinct structural and functional properties. In non-living, preserved brains, the outermost layers of the cerebrum has a grey color, hence the name "grey matter". Grey matter is formed by neurons and their unmyelinated fibers while the white matter below the grey matter of the cortex is formed predominantly by myelinated axons interconnecting different regions of the central nervous system. The human cerebral cortex is 2-4 mm (0.08-0.16 inches) thick and plays a central role in many complex brain functions including memory, attention, perceptual awareness, "thinking", language and consciousness.
The surface of the cerebral cortex is folded in large mammals where more than two thirds of the cortical surface is buried in the grooves, called "sulci". The phylogenetically more ancient part of the cerebral cortex, the hippocampus, is differentiated in five layers of neurons, while the more recent neo-cortex is differentiated in six basic layers. Relative variations in thickness or cell type (among other parameters) allows us to distinguish among different neocortical architectonic fields. The geometry of these fields seems to be related to the anatomy of the cortical folds and, for example, layers in the upper part of the cortical grooves (called gyri) are more clearly differentiated than in its deeper parts (called sulcal "fundi").
Location of the cerebral cortex
Slice of the cerebral cortex, ca. 10.5mm wide
Golgi-stained neurons in the somatosensory cortex of the macaque monkey.
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Last Edit: 19/07/2007 02:33:21 by Karen W.
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