- QPO
QPO may stand for Qualified Petty Officer , a ranking in the Royal Canadian Sea Cadets Quasi periodic oscillations , a phenomenon exhibited by certain astronomical sources disambig fr QPO ... more details
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- Quasi-periodic oscillation
refimprove date October 2009 In X ray astronomy , quasi periodic oscillation QPO is the manner in which the X ray light from an astronomical object flickers about certain frequencies. In these situations, the X rays are emitted near the inner edge of an accretion disk in which gas swirls onto a compact object such as a white dwarf , neutron star , or black hole . The QPO phenomenon promises to help astronomers understand the innermost regions of accretion disks and the masses, radii, and spin periods of white dwarfs, neutron stars, and black holes. QPOs could help test Albert Einstein s theory of general relativity which makes predictions that differ most from those of Newtonian gravity when the gravitational force is strongest or when rotation is fastest when a phenomenon called the Lense Thirring effect comes into play. However, the various explanations of QPOs remain controversial and the conclusions reached from their study remain provisional. A QPO is identified by performing a power spectrum of the time series of the X rays. A constant level of white noise is expected from the random variation of sampling the object s light. Systems that show QPOs sometimes also show nonperiodic ... observation . A QPO, on the other hand, appears as a broader peak, sometimes with a Lorentzian shape. What sort of variation with time could cause a QPO? For example, the power spectrum of an oscillating shot appears as a continuum of noise together with a QPO. An oscillating shot is a sinusoidal ... from several time intervals and then added together before the QPO can be seen to be statistically ... in the QPOs. Typical QPO frequencies were found to be between about 1 and 60 hertz . The fastest ... over a nearly regular interval. This signal is the QPO. Astronomers have long suspected that a QPO ..., so the QPO clock ticks quickly. As black holes increase in mass, the congestion zone is pushed farther out, so the QPO clock ticks slower and slower. References reflist See also Broad iron K line ... more details
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- Graciela Agudela
CENTURY IN MEXICO. Mar a Teresa Frenk. ntolog a Piano. Quindecim FONCA 38 QPO Meditations on Abya Yala , for flute. CD Jade night. Alejandro Escuer. Quindecim FOUNDATION BANCOMER 71 QPO Arabesque , for two recorders. CD HORACIO FRANCO Reissue . INBA CENIDIM CONACULTA Quindecim 55 QPO Lullaby , for voice ... more details
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- WQPO
States Category Radio stations in Virginia QPO Virginia radio station stub ... more details
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- Vicor Corporation
price. In 2003, Picor introduced two new families of products, the QPO QuietPower Output Ripple Attenuation SiP and QPI QuietPower 12 Amp Active EMI Filter for DC DC Converters . The QPO performs a similar function to the ?RAM in a smaller, lower cost surface mount package. Different QPO models allow ... more details
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- Submarine Warfare insignia
he has the requisite knowledge for the system he will ask a designated Qualification Petty Officer QPO &mdash an expert on the system in question for a checkout . The QPO will ask prepared questions concerning ... states and configurations. If the QPO feels the sailor has met his expectations, he will sign the sailor s qual card and those points will be included in the sailor s weekly point count. If the QPO ... more details
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- Vehicle registration plates of Oregon
The U.S. state of Oregon first required its residents to register their motor vehicle s and display license plate s in 1911. Passenger baseplates 1956 to present Refimprovesect date January 2011 All plates from 1956 until present are still valid, provided they are displayed on the vehicle to which they originally were issued. class wikitable Image First issued Design Slogan Serial format Serials issued Notes 1956 gold on blue none Coded by month of expiration 1 A 2345 Letters A through M indicate January through December expirations. 1960 gold on blue Pacific Wonderland Coded by month of expiration 1 A 2345 Letters N through Z indicate January through December expirations. 1964 gold on blue none Coded by month of expiration A BC 123 1973 blue on gold none Coded by month of expiration A BC 123 July 1988 Douglas Fir none ABC 123 PDN 000 to QPO 999 Awarded Plate of the Year for best new license plate of 1988 by the Automobile License Plate Collectors Association , the first time Oregon was so honored. Nov. 1989 rowspan 2 Douglas Fir rowspan 2 none ABC 123 QPZ 000 to ZZZ 999 Same design as previous, but with the colors changed in response to public criticism of the original colors. Tree changed from pale green to dark green, sky from light khaki to light blue and mountains made a deeper shade of lavendar. ref Goetze, Janet October 11, 1989 . Oregon plates are getting brighter 89 Legislature agreed to alter color scheme . The Oregonian , p. B6. ref Deleted image removed Image Oregon08pass.jpg 150px 2004 123 ABC 000 BAA to present No change to design or colors. Optional types class wikitable Image Type First issued Last issued Design Serial format Serials issued Notes Oregon Trail 1993 2000 Black on blue, yellow and green background. Embossed serials. 123 AAA 123 AAA to 999 AZZ Featured a Covered Wagon print. Printing of plates to this design ceased in 1998, ref Boone, Jerry January 5, 1998 . New traffic rules for 98 multiply . The Oregonian , p. B4. r ... more details
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- Super League play-offs
the Grand Final. Qualifying Semi Final One Highest ranked QPO Winner v Club Call selected PSF winner Qualifying Semi Final Two Second ranked QPO Winner v Club Call Non Selected PSF Winner Week ... more details
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- Super League III
St Helens EPO score1 46 EPO team2 leagueicon Bradford 12px Bradford Bulls EPO score2 24 QPO details 4 October 1998 QPO team1 leagueicon Leeds 12px Leeds Rhinos QPO score1 13 QPO team2 leagueicon Halifax 12px Halifax RLFC Halifax Blue Sox QPO score2 6 QSF details 11 October 1998 QSF team1 leagueicon ... more details
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- Unity Party of America
. ref http www.summitdaily.com article 20080630 NEWS 529915240 ref As a QPO, the Unity Party is designated ... more details
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- Cygnus X-2
Cygnus X 2 Cyg X 2 is the designation for an astronomical X ray source discovered and considered to be Cygnus XR 2. ref name Giacconi An Aerobee 150 sounding rocket was launched from White Sands Missile Range on October 11, 1966, to localize and identify X ray sources in the Cygnus region. ref name Giacconi cite journal author Giacconi R, Gorenstein P, Gursky H, Waters JR title An X Ray Survey of the Cygnus Region journal Ap J. month Jun year 1967 volume 148 issue 6 pages L119 doi 10.1086 180028 bibcode 1967ApJ...148L.119G ref During the effort to detect Cygnus XR 2 , Cyg X 2 was found. Extrasolar X ray source astrometry main Extrasolar X ray source astrometry The initial position of Cygnus X 2 Cyg X 2 in equatorial coordinates for the year 1950 J1950 is at right ascension RA RA 21 43 declination Dec Dec 38.8 . In J2000, according to SIMBAD , it is at RA RA 21 44 41.15 Dec Dec 38 19 17.1 . A refinement on the location of Cyg X 2 placed it at J1950 RA RA 21 42 48 Dec Dec 38 11 . ref name Giacconi Astronomical ultraviolet source main Astronomical ultraviolet source Cyg X 2 in the ultraviolet UV is one of the few quasi periodic oscillation QPO sources that is not so heavily reddened as to render it unobservable from the International Ultraviolet Explorer IUE . ref name Vrtilek Cyg X 2 UV observations are from June 11 14, 1988, and October 4 8, 1988. ref name Vrtilek These observations are in the short wavelength 120.0 200.0 nm and long wavelength 200.0 320.0 nm . ref name Vrtilek The UV flux is not directly correlated with the X ray flux observed by Ginga satellite Ginga over the same observation period. ref name Vrtilek The UV continuum strength and line strength both increase monotonically along the Z shaped curve. ref name Vrtilek Emission lines include He II, C IV, N III, N IV, N V, Si IV, and Mg II. ref name Vrtilek Astronomical visual source main Astronomical visual source The visual counterpart V1341 Cygni of Cygnus X 2 is not the X ray source. It is a donor sta ... more details
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- Super League IV
12px Castleford Tigers EPO score2 14 QPO details QPO team1 leagueicon St Helens 12px St Helens RLFC St Helens QPO score1 38 QPO team2 leagueicon Leeds 12px Leeds Rhinos QPO score2 14 QSF details QSF ... more details
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- Super League V
12px Castleford Tigers EPO score2 14 QPO details QPO team1 leagueicon St Helens 12px St Helens RLFC St Helens QPO score1 16 QPO team2 leagueicon Bradford Bulls 12px Bradford Bulls QPO score2 11 QSF details ... more details
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- Playoffs
out Elimination Play Off 2 6th vs 7th loser goes out Week Two Preliminary Semi Final 1 QPO 1 Loser vs EPO 1 Winner Preliminary Semi Final 2 QPO 2 Loser vs EPO 2 Winner Week Three Qualifying Semi Final 1 QPO 1 Winner vs PSF 1 or PSF 2 Winner Qualifying Semi Final 2 QPO 2 Winner vs PSF 1 or PSF 2 ... by the QPO winner in Week 1 that finished higher in the regular season Other leagues The two tiers ... more details
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- Astrosat
QPO s, flickering. Flaring and other variations in X ray binaries, e short and long term intensity ... more details
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- 2010 Leeds Rhinos season
Offs QPO Image Wigancolours.svg 12px Wigan Warriors 26 27 Image Rhinoscolours.svg 12px Leeds Rhinos ... more details
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- Accretion disc
discs thin discs, ADAFs unsolved physics Accretion disc QPO s Quasi periodic oscillation Quasi Periodic ... more details
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- Super League
Final One Highest ranked QPO Winner v Club Call selected PSF winner Qualifying Semi Final Two Second ranked QPO Winner v Club Call Non Selected PSF Winner Week 4 Super League Grand Final Cleanup date ... more details
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- Cygnus X-1
repetitive pattern called quasi periodic oscillations QPO . The mass of the compact object appears ... more details
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- List of astronomy acronyms
This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general public or by amateur astronomy amateur astronomers . id toc class toc summary Contents MediaWiki Toc style text align center 0 9 0 9 A A B B C C D D E E F F G G H H I I J J K K L L M M N N O O P P Q Q R R S S T T U U V V W W X X Y Y Z Z NOTOC top Top of page See also See also References References The acronyms listed below were placed into one or more of these categories Astrophysics terminology a general category for physics related acronyms Astronomical catalog Catalog a category for collections of tabulated scientific data Communications network a category that includes any network that functions primarily to communicate with spacecraft rather than performing astronomy Data a general category for astrophysical data not associated with any single catalog or observing program Astronomical object Celestial object a category that contains acronyms for natural objects in space and for adjectives applied to objects in space Instrumentation a category for telescope and other spacecraft equipment, particularly detectors such as imagers and spectrometer s Meeting a category for acronyms used to describe meetings that are not named after organizations Observing program an astronomical program, often a survey, performed by one or more individuals may also refer to the group that performs the survey Organization a category for any large private organization, government organization, or company Person a category form terms that refer to individual people Publication a category for acronyms used for magazines, scientific journals, and similar astronomy related publications Software a category for all software except catalogued data which is listed under catalog and scientific images Spacecraft a category that includes all spacecraft e ... more details
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