A Symplectic Integration Scheme that Allows Close Encounters between Massive Bodies J. E. Chambers, Armagh Observatory Mixed­variable symplectic integrators provide a fast, moderately accu­ rate way to study the long­term evolution of a wide variety of N­body sys­ tems (Wisdom & Holman 1991). ... A symplectic integrator works by splitting the Hamiltonian, H , for an N­body system, into two or more parts H = H 0 + H 1 + \Delta \Delta \Delta, where ffl i = H i =H 0 Ь 1 for i = 1; 2 : : :. ...

The sections <Directory> , <Location> and <Files> can contain directives which only apply to specified directories, URLs or files respectively. Also htaccess files can be used inside a directory to apply directives to that directory. ... The order of merging is: . ... If multiple <Directory> sections apply to the same directory they are processed in the configuration file order. ... Using the options in question is only possible inside a <Directory> section (or a .htaccess file). ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

... FOR IMMEDIATE RELEASE: NEWS MEDIA CONTACT: October 12, 2006 Bruce Romano (202) 418­2470 FCC TAKES STEPS TO ALLOW NEW LOW POWER DEVICES ON VACANT TV CHANNELS Washington, D.C. -- The Commission today adopted a First Report and Order and Further Notice of Proposed Rulemaking taking the first important steps toward allowing new low power devices to operate in the broadcast television spectrum at locations where channels in that spectrum are not in use by television stations or other authorized services....

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

Title: A Dark-Matter Spike at the Galactic Center? Authors: Piero Ullio , HongSheng Zhao , Marc Kamionkowski . ... Title: The Galaxy Environment of Quasars in the Clowes-Campusano Large Quasar Group at z~1.3 . ... Title: The Galaxy Environment of a Quasar at z=1.226: A Possible Cluster Merger . ... 16 matches for the search pattern galaxy environment . The URL for this page is: http://xxx.itep.ru/find/astro-ph/1/galaxy+environment/0/1/0/past,all/0/0 www-admin@xxx.lanl.gov ...

. Russian Version [ MS-Win ] . [ News ] . [ Satellite data ] . [ SMIS ] . [ ] . The program is intended for spectral and correlation analysis of satellite images. It contains an large set of spectral and spatial filters. It may be applied for interpolation and data analysis in areas with incomplete information. It allows for approximation of spectrum and correlation functions. Price . Back to SMIS Home Page .

User catalogs allow you enter positions for your objects into a file, to save time during an observing run. ... Before diving into the details, here is an example: # default coordinate system and object # (these are the standard defaults, so if you like them you can omit this line) CSys=FK5; Date =2000; RotType= Object ; RotAng=0 # some random objects # Name Pos1 (e.g. RA) Pos2 (e.g. Dec) Options in keyword-value format NGC6543 rot 90 ... Object Data . Defaults . Catalog Options . ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... Samara region . SSAU History . ... An alignment meeting on data mining, storage and processing of very large data amounts on the basis of hardware and software complex Big Data took place in Samara State Aerospace University. ... The laboratory for processing of very large data amounts on the basis of the hardware and software complex was made in the University and the necessary equipment was purchased. ... Data processing requires powerful processors and advanced computer programs. ... Big Data. ...

... The Amateur Telescope Makers of Boston, Inc. ATMoB) is an amateur astronomy club devoted to telescope making, observing, and studying the heavens. ... In 1973, the Bond Astronomical Society, another long-standing club, merged with the ATMoB making the club one of the oldest and largest general interest astronomy clubs in the country. ... The Amateur Telescope Makers of Boston, Inc. is an IRS designated 501(c)3 public charity organization. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Comment on J0513-2159 . Our image shows an extension to about 5 mas SE from the brightest feature. The EVN 8 GHz image by Dallacasa et al. (1998), with about five times larger resolution, shows an extension from the brightest feature roughly opposite to our direction. As noted by Dallacasa et al. (1998), the structure detected has a highly inverted spectrum, which, together with the reported variability in the source, could explain the structural disagreement. ...

Permitted Context: %text . ... The <IMG> tag is used to incorporate in-line graphics (typically icons or small graphics) into an HTML document. This element is NOT intended for embedding other HTML text. ... Browsers that cannot display in-line images ignore the IMG element unless it contains the ALT attribute. ... Take values TOP or MIDDLE or BOTTOM, defining whether the top or middle or bottom of the graphic should be aligned with the baseline for the text line in which the IMG element appears. ...

XXVIII General Assembly of the IAU, SPS15 Beijing, August 31, 2012 . N.N. Samus, S.V. Antipin "Variable Stars and Data-Intensive Astronomy" . During the 26th IAU General Assembly in Prague, the IAU Division V (Commissions 27 and 42) considered the future of variable-star catalogues. ... To discuss these problems and to look for their solutions, the IAU Commission 27, on behalf of the IAU Division V, created an informal working group, chaired by the GCVS editor, Dr. Nikolai Samus. ...

It is a matter of common knowledge that in processes of genesis and evolution of many solar phenomena participate magnetic fields of sunspots. ... As a basis for formation of the database we take data on magnetic fields, collected by set of observatories during many years of observations. ... Section "Magnetic field data" contains data of magnetic field observation for separate sunspots, presented in standard text format (ASCII). ... Description of structure of these files is presented here . ...

... High-pressures experiments are mostly aimed at studying phase transformations in solids, synthesising new phases and studying their composition, crystal and magnetic structure, physical and thermodynamical properties. ... The specific feature of investigations at LHPP that distinguishes it from most other high-pressure laboratories is combining in situ measurements with studies at ambient pressure of new high-pressure phases fixed by quenching to liquid nitrogen temperature. ...

Growth of Epitaxial (001) YBa2Cu3O7 Superconducting Thin Films on (001) Diamond Substrate. ... In order to reach higher frequencies and lower losses, it is necessary to use substrate material with lower dielectric constants and low losses in far infrared region. ... In the present work, as a first step in this direction, we present results of successful growth of epitaxial (001)YBa2Cu3O7 thin film on (100) diamond substrate by pulse laser deposition method. ...

... Фитнес-браслет Jawbone UP24 Large, Розовый . Jawbone . ... Артикул: CALLAS_PEACOCK_BLUE PETROL Цвет: сине-зеленый Состав: 65% полиэстер, 35% хлопок Особенности: стильный пуловер с длинным рукавом свободного кроя. ... Тип: подвесная, . ... Тип лампы: накаливания, . ... Цвет арматуры: матовый никель, . ... Цвет плафонов и подвесок: белый с рисунком, золото, неокрашенный . Цвет арматуры: золото . Тип поверхности плафонов и подвесок: матовый . Тип поверхности арматуры: глянцевый . ...

image collection >> physical phenomena >> river plumes . Image env0606160745VV . ... Gulf of Taganrog . ... The image was taken under northeast wind of 3-5 m/s. Large dark patches at the mouth of river Don and near the city of Taganrog (2) mark the river plume and coastal rainwash containing surfactants of mixed origin. The long fork-shaped outflow from Miussky Liman (1) and a dark patch near the Yeysk Spit (3) are of similar origin. Image . ... image size: 680pxl*656pxl . ...