An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . ... d) The Age of the Chemical Elements . ... Some isotopes (forms of the element with different numbers of neutrons in the nucleus) of these elements are radioactive; they change into other isotopes at a rate that can be measured accurately in the laboratory. ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

Microsymposium 40, abstract 88, 2004 (A4 format) GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: EXPERIMENT AND SIMULATION FOR PLANETARY GAMMA-RAY SPECTROSCOPY. ... Then the calculation can be restarted by producing gamma rays and let them trans- GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: N. Yamashita et al. port and react, with initial energies determined the outside multiplication and initial locations wh neutron capture reaction took place. ...

... Empirical and theoretical modeling of 3-D structures in the solar corona is confronted by the tremendous amount of data needed to represent phenomena with a large dynamic range both in size and magnitude, and with a rapid temporal evolution. Octree representation of the 3-D coronal electron distribution offers the right compromise between resolution and size, allowing computation of synthetic images of the solar corona. ... The time interval between images is one day. ...

... Delivery Procedures . ... File Structure . Reference Files . ... The procedure compares two FITS reference files tables. ... The compared elements are limited to those specified in the COLUMNS parameter (which is necessary for this program to run). ... The parameter COLUMNS is an n-element array of strings with the names of the columns to compare within the table. ... When a combination is missing (in the new_file ;or in the old_file) the procedure will flag it in the standard output. ...

... Archives . ... Discontinuation of weekly [arXiv] series . ... For a discipline that relies so heavily on images, it is rather surprising how little use astronomy makes of the vast body of work on image analysis carried out by mathematicians and computer scientists. ... images. ... Images may be Opened and Closed with different structure elements. ... Tags: close , dilate , EotW , Equation , Equation of the Week , erode , Morphological operator , open , set theory . Category: Imaging , Jargon | ...

. Computer Ephemeris. Elements of osculating planetary orbits. Explanations. Each row contains at 0h of Time Dynamical Terrestrial of specified date in system of mean equator and ecliptic J2000.0 the ecliptic osculating elements of heliocentric orbit: inclination of orbital plane (degrees), longitude of ascending node (degrees), argument of perigelion (degrees), semimajor axis (astronomical units), mean motion (degrees per day), eccentricity (dimensionless), mean anomaly (degrees).

... PmWiki / . visitors (intermediate) Web feeds are a convenient mechanism to let visitors be notified of changes to a site. ... Web feeds are commonly recognized by terms such as RSS , Atom , and web syndication . ... Using a feed action such as ?action=rss or ?action=atom on a trail generates a web feed (often called a "channel") where each page on the trail is an item in the feed. ... The feed url will be the name of a trail page with ?action=rss or ?action=atom added to the end of the url. ...

... A brief description of your research aims: . To construct new AGB evolution models using updated opacity tables and reaction rates and comparing with observations where there has been two distinct populations observed in the halo separated by alpha elements. ... A brief description of the nature of the computations to be performed (resources required, interactive/batch job, i/o requirements, single processor/parallel jobs, scalability): . ... COALA : Universe Galaxy AGN Star Planet ...

... ASSOCIATE/RANK table col1 col2 [action] . ... BIN/TABLE table col1 col2 [bin] [min] [max] [sigma] . creates a table, bin.tbl with averages of col2 in bins of col1 . COMPARE/2SAM table col1 col2 . ... COMPUTE/FIT image[,error] [= function[(refima)]] . ... COMPUTE/FIT table y[,error] [= function[(ind)]] . ... COMPUTE/FUNCTION image = function[(refima)] . compute function values, result as image . COMPUTE/FUNCTION table y = function[(ind)] . ... define user functions for fitting . ...

... The <B> element specifies that the enclosed text should be displayed in a boldface. ... The <I> element specifies that the enclosed text should be displayed, if practical, in an italic font (or slanted). ... The <SMALL> element specifies that the enclosed text should be displayed, if practical, using a small font (compared with normal text). ... The <SUB> element specifies that the enclosed text should be displayed as a subscript, and if practical, using a smaller font (compared with normal text). ...

On this page you can compute thermodynamics, opacity and nuclear reaction rates for conditions which exist inside the Sun. ... Logarithmic partial derivative dlogP/dlogT (hi_t) . Logarithmic partial derivative dlogP/dlogRHO (hi_rho) . Logarithmic partial derivative dlogP/dlogX (hi_x) . Logarithmic partial derivative dlogU/dlogT (ksi_t) . ... Input field size does not limit the amount of data entered; you can type or paste thousands of lines (10,000 lines tested with output size over 5MB). ...

... The package AMPLE (Adaptable Minor Planet Ephemerides) is dedicated to solving a number of problems concerning minor planets with the aid of IBM-type personal computer. ... Obtaining selection of orbital elements and/ or photometric parameters of minor planets in conformity with imposed restrictions. ... The orbital elements of all minor planets used in AMPLE for 2015 have been determined in IAA on the ground of available observations in the catalogue of observations of the Minor Planet Center. ...

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The beam pattern and the polarization characteristics . of the radio telescope RATAN-600 . The Mueller matrix elements was computed via formulas [1]: . ... The BP were computed by the aperture method, proceeding from the fild distribution in the aperture of the primary mirror. The components of the main and cross-polarization components of the electric field in the vertical aperture of the primary mirror was computed in Frenel diffraction approximation. ...

... Определение и простейшие свойства; модули Верма, классификация неприводимых объектов. Категория O для алгебры sl_2. ... Разложение категории O на блоки. Функторы сдвига и приложения: проективные объекты, наклонные объекты, проективные функторы. ... Категория O и многообразие флагов: теоремы Зергеля, многочлены Каждана-Люстига и характеры неприводимых модулей. Пространство флагов. Модули Вейля и классификация неприводимых модулей. ...

The computed band passes. ... The interim correlator input is filtered by 8 analog filters (50 Mhz wide at the 260 Mhz IF... one for each sub correlator). ... For bandwidths of 25 Mhz and below the real data stream is digitally down converted to complex samples I, Q streams. ... The Top figure is the halfband filter bandpass computed from the filter coefficients. ... The computed filter has aliased power, extra IQ filtering, and two applications of the filter on the resulting real bandpass. ...

Next: Ground calibration Up: RGS_EFFAREACORR Previous: Purpose Contents . Effective-area correction factors and rectification factors are tabulated against energy in the EFFAREACORR and RECTIFICATION extensions, repsectively. The relatively small number of elements in the tabulation compared with the number of RGS spectra elements has been determined by the smoothness of the functions concerned. ... Michael Smith 2011-09-20 ...

Chair of solid state physics . ... The most important concepts of the modern crystallography, crystal symmetry and methods of crystal structure determination are considered. ... The main experimental aims of X-ray diffraction study of classic crystal structure and real structure are analyzed. ... Crystal lattice. ... The main diffraction schemes in representation of a reciprocal lattice: Laue method, powder diffraction method, oscillation method, X-ray diffraction on powder sample and single crystal. ...

Underdetermined sets is a new type of data structures (terms) developed in Actor Prolog . ... The point is that an underdetermined set can include some indefinite rest (a tail) like a list in usual Prolog . At the same time, the order of elements of an underdetermined set can be arbitrary one and it does not affect results of unification of underdetermined sets. Moreover, Actor Prolog guarantees that a rest of an underdetermined set never contains elements that are explicitly given in the set. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium is leading the way in the digital theatre world with the installation of our brand new Digistar 4 Theatre System .€а This marks the first installation of the worldтАЩs most advanced star theatre system in the UK, enabling audiences to see the Cosmos like never before. ... Armagh Planetarium was the first in the world to use video projectors to show moving images on the dome. ... тАЬDigistar 4 Planetarium Projection System in Action | ...