dedispersion
dedispersion A technique used in radio astronomy to compensate for the smearing effect of interstellar
dispersion (2). The radio band being observed is divided into many narrow channels, each of which is measured separately. Provided the dispersion measure of the source is known, appropriate time delays can be introduced between the channels to remove the dispersive delay across the band. The signals from the channels are then recombined to form a dedispersed signal. Dedispersion is widely used for the observation of pulsars, whose narrow pulses are readily smeared out by interstellar dispersion.
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110 reasons to celebrate.(periodic table)
Magazine article from: Canadian Chemical News; 5/1/2004; 700+ words
; The periodic table never looked so good. The Centennial Periodic Table project was designed...artwork features each element in the periodic table as interpreted...like the rare element Yttrium depicted by Superman...
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Analysis: Periodic table of elements
Transcript from: NPR Talk of the Nation Science Friday; 7/19/2002; ; 700+ words
; ...0000 Analysis: Periodic table of elements Host...might remember the periodic table--you ought...seemingly obscure elements are more important...radioactive decay of the element thorium? Joining...thorium. There's yttrium, ytterbium, actinium...gathering dust on the ...
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 "The Economist (US)")
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The good element guide. (satire on Mendeleyev's periodic table of elements)
Magazine article from: The Economist (US); 9/8/1990; 700+ words
; WHEN the periodic table of the elements...implications, not even the elements. The past decade...arrow down] of the periodic table, with their...commonest of the elements used to be a baddie...Rarely has an element lost favour faster...married to gallium). Yttrium ...
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CanAlaska stakes new rare earth project: 2008 drilling update.
PR Newswire; 3/11/2008; 700+ words
; ...rare earth element assay results...drilling. Table 1. First...rare earth elements (or "rare...series of the Periodic Table of the Elements, plus yttrium and scandium. Rare earth elements are used...for multi-element geochemistry...
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CHAT LIVE in the only dedicated CHAT ROOM for CanAlaska Uranium Ltd. (OTCBB: CVVUF) shareholders!
M2 Presswire; 3/13/2008; 700+ words
; ...report rare earth element assay results...The rare earth elements (or "rare earths...series of the Periodic Table of the Elements, plus yttrium and scandium. Rare earth elements are used in a...analysed for multi-element geochemistry...
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Arianne Resources Inc./Havre Nord Project: A Pegmatite Returns Up to 0.43% U3O8
Newspaper article from: CCNMatthews Newswire; 10/24/2007; 700+ words
; ...grades as shown in the table below (from #263809...potential of the REM. A table is available on Marketwire...Materials are a group of 17 elements of which yttrium, scandium and the lanthanides series of the periodic table of elements. With their...
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Hoidas Lake Rare Earth Project Advances to Prefeasibility.
PR Newswire Europe; 7/31/2006; 700+ words
; ...significantly. The rare earth elements (REE) are a group of 17 elements comprised of yttrium, scandium and the lanthanide series of elements in the Periodic Table. The lanthanides include...depending on the particular element and the purity level...
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Hoidas lake rare earth project advances to prefeasibility.
PR Newswire; 7/31/2006; 700+ words
; ...significantly. The rare earth elements (REE) are a group of 17 elements comprised of yttrium, scandium and the lanthanide series of elements in the Periodic Table. The lanthanides include...depending on the particular element and the purity level...
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Sci-triv game.
Magazine article from: Current Science, a Weekly Reader publication; 11/19/2004; 700+ words
; ...addition of four new elements to the Periodic Table: erbium, terbium, ytterbium, and yttrium. 2. A. Pencils...POINTS The elements Whooping cough...and originally yttrium are named crossed...kilometers = POINTS the element a Persian doctor...
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 "Star Tribune (Minneapolis, MN)")
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Scientists' `millennium molecule' made out of the elements of humor, chemistry; The theoretical concoction dreamed up during a boring speech doesn't exist, but it could, its creator says, and there are other possibilities.(NEWS)
Newspaper article from: Star Tribune (Minneapolis, MN); 12/17/1999; ; 700+ words
; ...and two atoms of yttrium with one of potassium...for two atoms of yttrium (Y), a silvery...silvery metallic element, is "Y2K" - just...was looking at a periodic table, making words out...said, because its elements are both metals...consist of a blend of yttrium, nitrogen, ...
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Periodic Table of the Elements: Yttrium
Book article from: The Columbia Encyclopedia, Sixth Edition
Periodic Table of the Elements: Yttrium Periodic Table of the Elements: Yttrium Atomic Number: 39 Atomic Symbol: Y Yttrium Atomic Weight: 88.9059 Electron Configuration: 2 · 8 ·&thinsp...
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Yttrium (revised)
Book article from: Chemical Elements: From Carbon to Krypton
...elements in Groups 3 through 12 of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The element above yttrium in the periodic table is scandium. The space below...
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Yttrium
Encyclopedia entry from: The Gale Encyclopedia of Science
Yttrium Yttrium — an element...in Group 3 of the periodic table, one of the transition metals. Yttrium is not itself a rare...was the first new element to be identified...contain nine other elements in addition to yttrium...
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yttrium
Book article from: The Columbia Encyclopedia, Sixth Edition
yttrium [for Ytterby, a town in Sweden], metallic chemical element; symbol Y; at. no...4.45; valence +3. Yttrium is a highly crystalline...lanthanum in Group 3 of the periodic table . Yttrium is fairly stable in air...
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trace elements
Book article from: The Oxford Companion to the Earth
...environments. Trace elements have gained...groups of trace elements. The first...position of an element in the periodic table. Because...properties of an element are largely...configuration, elements with similar...lanthanides and yttrium; (2) actinides...
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