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Author Topic: A-Z of AVIONICS  (Read 448925 times)

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #775 on: 30/07/2007 13:17:57 »
Sagitta

Abbreviation:
    Sge
English name:
    Arrow
Coordinates
    see Stellar data

Particulars:

    * Double star zeta Sge
    * Recurrent Nova WZ Sge
    * Globular cluster M 71

General:

A very small constellation lying south of the Fox, Vulpecula, and north of the Eagle, Aquila. As a matter of fact Sagitta is the third smallest constellation in the sky. It shows clearly the shape of an arrow flying towards the Swan, Cygnus.

Stars and other objects

The A3 main sequence star zeta Sge (5.00 mag) has a 9th mag companion. Small telescopes can resolve this pair.
WZ Sge is a nova which lightens up from time to time from 15th mag to 7th mag. It has been observed twice in this century: in 1913 and in 1946. Further outbursts may occur at any time.
In binoculares and small telescopes the globular cluster M71 appears as a misty patch of a sperical shape. Although it is nowadays classified as a globular cluster some authorities still refer to it as open star cluster. See the Messier database for details.

Mythological Background:

Sagitta is thought to be the arrow shot by Hercules as he is hunting the two birds, Aquila and Cygnus. But it seems that the had luck and escaped.

 

Offline Simulated

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Re: A-Z of AVIONICS
« Reply #776 on: 30/07/2007 15:27:21 »
Tyrannosaurus Rex! Everyone knows that's the worlds most known dinosaur!
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #777 on: 30/07/2007 16:36:25 »
Unicode


.............is an industry standard allowing computers to consistently represent and manipulate text expressed in any of the world's writing systems. Developed in tandem with the Universal Character Set standard and published in book form as The Unicode Standard, Unicode consists of a repertoire of about 100,000 characters, a set of code charts for visual reference, an encoding methodology and set of standard character encodings, an enumeration of character properties such as upper and lower case, a set of reference data computer files, and rules for normalization, decomposition, collation and rendering.[1]
 

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Re: A-Z of AVIONICS
« Reply #778 on: 30/07/2007 17:00:51 »
Vortex



From Wikipedia, the free encyclopedia
Jump to: navigation, search
For other uses, see Vortex (disambiguation).
Vortex created by the passage of an aircraft wing, revealed by coloured smoke
Vortex created by the passage of an aircraft wing, revealed by coloured smoke

A vortex (pl. vortices) is a spinning, often turbulent, flow (or any spiral motion) with closed streamlines. The shape of media or mass swirling rapidly around a center forms a vortex. It flows in a circular motion.
Contents
[hide]

    * 1 Dynamics
    * 2 Two types of vortex
          o 2.1 Free (irrotational) vortex
          o 2.2 Forced (rotational) vortex
    * 3 Observations
          o 3.1 Instances
    * 4 See also
    * 5 References and further reading
    * 6 External links

[edit] Dynamics

A vortex can be any circular or rotary flow that possesses vorticity. Vorticity is a mathematical concept used in fluid dynamics. It can be related to the amount of "circulation" or "rotation" in a fluid. In fluid dynamics, vorticity is the circulation per unit area at a point in the flow field. It is a vector quantity, whose direction is (roughly speaking) along the axis of the swirl. Also in fluid dynamics, the movement of a fluid can be said to be vortical if the fluid moves around in a circle, or in a helix, or if it tends to spin around some axis. Such motion can also be called solenoidal. In the atmospheric sciences, vorticity is a property that characterizes large-scale rotation of air masses. Since the atmospheric circulation is nearly horizontal, the (3 dimensional) vorticity is nearly vertical, and it is common to use the vertical component as a scalar vorticity.

Mathematically, it is defined as,

        \vec \omega = \nabla \times \vec \mathit{u}

where \vec \mathit{u} is the fluid velocity.

The properties of vorticity in 2 and 3 dimensions are treated in some depth in George Batchelor's famous textbook (ch 5 & ch 7 et seq.). Of particular importance in practical situations is the intensification of vorticity which takes place in three dimensions when a vortex-line is extended (p270 et seq).
 

Offline Simulated

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Re: A-Z of AVIONICS
« Reply #779 on: 01/08/2007 21:37:43 »
Watermelon!
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #780 on: 12/08/2007 18:59:23 »
XANTHIUM (Cocklebur)


The Cockleburs (Xanthium) are a genus of flowering plants in the family Asteraceae, native to the Americas and eastern Asia.

They are coarse, herbaceous annual plants growing to 50-120 cm tall. The leaves are spirally arranged, with a deeply toothed margin. Some species, notably X. spinosum, are also very thorny with long, slender spines at the leaf bases.

The flowers are of two types; One, in short terminal branches, produces only pollen. The other, in clusters in the axils of the leaves, produces seed.

Unlike many other members of the family Asteraceae, whose seeds are airborne with a plume of silky hairs resembling miniature parachutes, cocklebur seeds are produced in a hard, spiny, globose or oval double-chambered, single-seeded bur 8-20 mm long. It is covered with stiff, hooked spines, which sticks to fur and clothing and can be quite difficult to extract. These remarkable burred seeds have allowed this plant to be carried all over the world by unsuspecting travelers. This plant reproduces only by means of its seed.

Cockleburs are short-day plants, meaning they only initiate flowering when the days are getting shorter in the late summer and fall, typically from July to October in the northern hemisphere. They can also flower in the tropics where the daylength is constant.

 

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Re: A-Z of AVIONICS
« Reply #781 on: 12/08/2007 19:22:21 »
Yodeling

http://en.wikipedia.org/wiki/Yodeling

Yodeling (or yodelling, jodeling) is a form of singing that involves singing an extended note which rapidly and repeatedly changes in pitch from the vocal chest register (or "chest voice") to the head register (or "head voice"), making a high-low-high-low sound. This vocal technique is used in many cultures throughout the world.

In Swiss folk music, it was probably developed in the Swiss and Austrian Alps as a method of communication between mountain peaks, and it later became a part of the traditional music of the region. In Persian and Azeri classical music, singers frequently use tahrir, a yodeling technique that oscillates on neighbor tones. In Georgian traditional music, yodelling takes the form of krimanchuli technique. In Central Africa, Pygmy singers use yodels within their elaborate polyphonic singing. Yodeling is often used in American bluegrass and country music.

Technique

All human voices are considered to have at least two distinct vocal registers, called the "head" and "chest" voices, which result from different ways that the tone is produced. Most people can sing tones within a certain range of relatively lower pitch in their chest voices, and then a certain range of relatively higher pitch in their head voices. There is often a gap between these ranges, especially in inexperienced or untrained singers. Experienced singers, who can control their voices to the point where these ranges overlap, can easily switch between them to produce high-quality tones in either. Yodelling is a particular application of this technique, wherein a singer might switch between these registers several times in but a few seconds, at a high volume. Going back and forth over this "voice break" repeatedly produces a very distinctive type of sound.

For example, in the famous example syllable "Yodl - Ay - EEE - Ooooo", the "EEE" is sung in the head voice, while all other syllables are in the chest voice.

 For examples please see Wiki Links!


 

Offline iko

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Re: A-Z of AVIONICS
« Reply #782 on: 15/08/2007 12:10:30 »
Zulu

...Last 'word' in our International Radio Operator Alphabet!

http://www.thenakedscientists.com/forum/index.php?topic=5250.msg48296




Alpha
Bravo
Charlie
Delta
Echo
Fox
Golf
Hotel
India
Juliet
Kilo
Lima
Mike
November
Oscar
Papa
Quebec
Romeo
Sierra
Tango
Uniform
Victor
Whiskey
X-Ray
Yankee
Zulu

http://www.electronicaviation.com/articles/General/281


Zand zow, zear zrendos zI zink zis zud ze zhe zend zof zit!!!  ;D
« Last Edit: 15/08/2007 12:31:21 by iko »
 

Offline iko

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Re: A-Z of AVIONICS
« Reply #783 on: 15/08/2007 18:19:44 »
 

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Re: A-Z of AVIONICS
« Reply #784 on: 15/08/2007 19:01:02 »
WONDERFUL TO SEE IKO HERE....Friendus Wonderfulus !

Antimony (IPA: 'æntəməʊni) is a chemical element in the periodic table that has the symbol Sb (Latin: stibium, meaning "mark") and atomic number 51. A metalloid, antimony has four allotropic forms. The stable form of antimony is a blue-white metalloid. Yellow and black antimony are unstable non-metals. Antimony is used in flame-proofing, paints, ceramics, enamels, a wide variety of alloys, electronics, and rubber.

 


Offline neilep

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Re: A-Z of AVIONICS
« Reply #786 on: 17/08/2007 16:59:55 »
Coldest temperature recorded on Earth

Cold in nature


Antarctica is the coldest place on Earth, with the lowest natural temperature ever recorded on Earth of -89 °C (-129°F) having been recorded there in 1983 at the Russian Vostok Station.
 

Offline Karen W.

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Re: A-Z of AVIONICS
« Reply #787 on: 18/08/2007 06:16:38 »
  Dreams
 

Offline JimBob

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Re: A-Z of AVIONICS
« Reply #788 on: 19/08/2007 22:14:08 »
Epigallocatechin gallate

An antioxidant found in tea (or chi)
« Last Edit: 19/08/2007 22:53:22 by neilep »
 

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Re: A-Z of AVIONICS
« Reply #789 on: 19/08/2007 22:33:35 »
HUH?
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #790 on: 19/08/2007 22:56:44 »
Karen..Jimbob somehow had the size of the font set to 1.  I corrected it.


follicle,Hair


A hair follicle is part of the skin that grows hair by packing old cells together. Attached to the follicle is a sebaceous gland, a tiny sebum-producing gland found everywhere except on the palms, lips and soles of the feet. The thicker density of hair, the more sebaceous glands are found.

At the base of the follicle is a large structure that is called the papilla. The papilla is made up mainly of connective tissue and a capillary loop. Cell division in the papilla is either rare or non-existent. Around the papilla is the hair matrix, a collection of epithelial cells often interspersed with melanocytes. Cell division in the hair matrix is responsible for the cells that will form the major structures of the hair fibre and the inner root sheath. The hair matrix epithelium is one of the fastest growing cell populations in the human body, which is why some forms of chemotherapy that kill dividing cells or radiotherapy may lead to temporary hair loss, by their action on this rapidly dividing cell population. The papilla is usually ovoid or pear shaped with the matrix wrapped completely around it except for a short stalk-like connection to the surrounding connective tissue that provides access for the capillary.

Also attached to the follicle is a tiny bundle of muscle fiber called the arrector pili that is responsible for causing the follicle and hair to become more perpendicular to the surface of the skin, and causing the follicle to protrude slightly above the surrounding skin. This process results in goose bumps (or goose flesh). Stem cells are located at the junction of the arrector and the follicle, and are principally responsible for the ongoing hair production during a process known as the Anagen stage.

The average growth rate of hair follicles on the scalp is .04 cm per day.


 

Offline iko

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Re: A-Z of AVIONICS
« Reply #791 on: 20/08/2007 20:14:41 »
Griseofulvin





Griseofulvin (also known as Grisovin) is an antifungal drug. It is used both in animals and in humans, to treat ringworm infections of the skin and nails. It is derived from the mold Penicillium griseofulvum.

It is administered orally.


...more from:  http://en.wikipedia.org/wiki/Griseofulvin
« Last Edit: 20/08/2007 20:17:41 by iko »
 

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Re: A-Z of AVIONICS
« Reply #792 on: 22/08/2007 19:54:42 »
Hallucination

A hallucination is a sensory perception experienced in the absence of an external stimulus, as distinct from an illusion, which is a misperception of an external stimulus. Hallucinations may occur in any sensory modality—visual, auditory, olfactory, gustatory, tactile, proprioceptive, equilibrioceptive, nociceptive, thermoceptive.
Prevalence and types of hallucinatory experience

Studies have now shown hallucinatory experiences take place across the population world wide. Previous studies, one as early as 1894[1], have reported that approximately 10% of the population experience hallucinations. A recent survey of over 9,000 people[2] reported a much higher figure with almost 39% of people reported hallucinatory experiences, 27% of which reported daytime hallucinations, mostly outside the context of illness or drug use. From this survey, olfactory (smell) and gustatory (taste) hallucinations seem the most common in the general population.

Hypnagogic hallucinations and hypnopompic hallucinations are considered normal phenomena. Hypnagogic hallucinations can occur as one is falling asleep and hypnopompic hallucinations occur when one is waking up.

Auditory hallucinations, particularly of one or more talking voices, are particularly associated with psychotic disorders such as schizophrenia, and hold special significance in diagnosing these conditions, although many people not suffering from diagnosable mental illness may sometimes hear voices as well.[3] The Hearing Voices Movement is a response to the Psychiatric interpretation of auditory hallucination. Other types of auditory hallucinations include musical hallucinations, where people will hear music playing in their mind, usually songs they are familiar with. This can be caused by lesions on the brain stem, occurring most often from strokes, but also tumors, sencephalitis, or abscesses.[4] Recent reports have also mentioned that it is possible to get musical hallucinations from listening to music for long periods of time.[1] Florid hallucinations are usually associated with drug use (particularly hallucinogenic drugs), sleep deprivation, psychosis or neurological illness.
 

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Re: A-Z of AVIONICS
« Reply #793 on: 24/08/2007 14:01:30 »
id·i·o·blast

 a plant cell (as a sclereid) that differs markedly from neighboring cells

a botanical term for an individual cell which is distinguished by its shape, size or contents, such as the stone-cells in the soft tissue of a pear.
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #794 on: 24/08/2007 14:05:28 »
Jute is a long, soft, shiny vegetable fibre that can be spun into coarse, strong threads. It is produced from plants in the genus Corchorus, family Malvaceae.

Jute is one of the cheapest natural fibres and is second only to cotton in amount produced and variety of uses. Jute fibres are composed primarily of the plant materials cellulose (major component of plant fibre) and lignin (major components wood fibre). It is thus a ligno-cellulosic fibre that is partially a textile fibre and partially wood. It falls into the bast fibre category (fibre collected from bast or skin of the plant) along with kenaf, industrial hemp, flax (linen), ramie, etc. The industrial term for jute fibre is raw jute. The fibres are off-white to brown, and 1–4 meters (3–12 feet) long.


Jute fibre is often called hessian; jute fabrics are also called hessian cloth and jute sacks are called gunny bags in some European countries. The fabric made from jute is popularly known as burlap in North America.


 

Offline iko

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« Last Edit: 26/08/2007 16:34:40 by iko »
 

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Re: A-Z of AVIONICS
« Reply #796 on: 31/08/2007 17:28:14 »
Lake


A lake (from Latin lacus) is a body of water or other liquid of considerable size contained on a body of land. A vast majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher latitudes. In ecology the environment of a lake is referred to as lacustrine. Large lakes are occasionally referred to as "inland seas" and small seas are occasionally referred to as lakes. Smaller lakes tend to put the word "lake" after the name, as in Green Lake, while larger lakes often invert the word order, as in Lake Ontario, at least in North America. In some places, the word "lake" does not correctly appear in the name at all (eg Windermere in Cumbria).

Most lakes have a natural outflow in the form of a river or stream, but some do not, and lose water solely by evaporation and/or underground seepage. They are termed endorheic lakes (see below).

The term lake is also used to describe a feature such as Lake Eyre, which is a dry basin most of the time but may become filled under seasonal conditions of heavy rainfall.

Many lakes are artificial and are constructed for hydro-electric power supply, recreational purposes, industrial use, agricultural use, or domestic water supply.

Evidence of extra-terrestrial lakes exists; "definitive evidence of lakes filled with methane" was announced by NASA as returned by the Cassini Probe observing the moon Titan, which orbits the planet Saturn.


A Lake !!


 

Offline iko

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Re: A-Z of AVIONICS
« Reply #797 on: 31/08/2007 21:17:30 »
Lake


A lake (from Latin lacus) is a body of water or other liquid of considerable size contained on a body of land. A vast majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher latitudes. In ecology the environment of a lake is referred to as lacustrine. Large lakes are occasionally referred to as "inland seas" and small seas are occasionally referred to as lakes. Smaller lakes tend to put the word "lake" after the name, as in Green Lake, while larger lakes often invert the word order, as in Lake Ontario, at least in North America. In some places, the word "lake" does not correctly appear in the name at all (eg Windermere in Cumbria).

Most lakes have a natural outflow in the form of a river or stream, but some do not, and lose water solely by evaporation and/or underground seepage. They are termed endorheic lakes (see below).

The term lake is also used to describe a feature such as Lake Eyre, which is a dry basin most of the time but may become filled under seasonal conditions of heavy rainfall.

Many lakes are artificial and are constructed for hydro-electric power supply, recreational purposes, industrial use, agricultural use, or domestic water supply.

Evidence of extra-terrestrial lakes exists; "definitive evidence of lakes filled with methane" was announced by NASA as returned by the Cassini Probe observing the moon Titan, which orbits the planet Saturn.


A Lake !!


Your 'lake' looks much more like a Pond to me...  ;D

« Last Edit: 31/08/2007 21:22:27 by iko »
 

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Re: A-Z of AVIONICS
« Reply #798 on: 04/09/2007 22:14:28 »
Lake


A lake (from Latin lacus) is a body of water or other liquid of considerable size contained on a body of land. A vast majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher latitudes. In ecology the environment of a lake is referred to as lacustrine. Large lakes are occasionally referred to as "inland seas" and small seas are occasionally referred to as lakes. Smaller lakes tend to put the word "lake" after the name, as in Green Lake, while larger lakes often invert the word order, as in Lake Ontario, at least in North America. In some places, the word "lake" does not correctly appear in the name at all (eg Windermere in Cumbria).

Most lakes have a natural outflow in the form of a river or stream, but some do not, and lose water solely by evaporation and/or underground seepage. They are termed endorheic lakes (see below).

The term lake is also used to describe a feature such as Lake Eyre, which is a dry basin most of the time but may become filled under seasonal conditions of heavy rainfall.

Many lakes are artificial and are constructed for hydro-electric power supply, recreational purposes, industrial use, agricultural use, or domestic water supply.

Evidence of extra-terrestrial lakes exists; "definitive evidence of lakes filled with methane" was announced by NASA as returned by the Cassini Probe observing the moon Titan, which orbits the planet Saturn.


A Lake !!




Now this is a lake.. Crater Lake.. See the intensity of the deep blue water so blue you think it had to be the sky or a dream!!


"mountains" Volcanic
 

Offline neilep

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Re: A-Z of AVIONICS
« Reply #799 on: 10/09/2007 22:02:44 »
I am ' C ' for confused about what letter we're on !

gonna go with 'M'

Mitosis is the process in which a cell duplicates its chromosomes to generate two identical cells. It is generally followed by cytokinesis which divides the cytoplasm and cell membrane. This results in two identical cells with an equal distribution of organelles and other cellular components. Mitosis and cytokinesis jointly define the mitotic (M) phase of the cell cycle, the division of the mother cell into two sister cells, each with the genetic equivalent of the parent cell. Mitosis occurs most often in eukaryotic cells.

In multicellular organisms, the somatic cells undergo mitosis, while germ cells — cells destined to become sperm in males or ova in females — divide by a related process called meiosis. Prokaryotic cells, which lack a nucleus, divide by a process called binary fission.


Mitosis divides genetic information during cell division.
 

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Re: A-Z of AVIONICS
« Reply #799 on: 10/09/2007 22:02:44 »

 

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