... A model for the chemical evolution of a disk galaxy is presented. The model reproduces all the basic . ... investigations of the star formation history. ... the galaxyЫand incorporating a delay in the onset of star formation make it possible to model different scenar- . ios for the evolution of a galaxy's luminosity. ... evolution of massive galaxies. ... of reconstructing the star-formation history and galactic luminosity from observations of galaxies at different . ...

. A file system is a logical method for organising and storing large amounts of information in a way which makes it easy manage. The file is the smallest unit in which information is stored. The UNIX file system has several important features. Different types of file . Structure of the file system . Your home directory . Your current directory . Pathnames . Access permissions .

... Because of the low conductivity, the magnetic coupling is weak and depends critically on density, temperature, ionisation rate and charged species. ... Implications When the Hall regime dominates near the midplane and ambipolar diffusion is dominant closer to the surface, a thicker layer of the disc is unstable to MRI perturbations and modes grow faster than under the ambipolar diffusion approximation. ... Right panel: For weak coupling, Hall limit perturbations grow until vA/cs ~ 2.9. ...

God Science Forum Message . ... The Destropic Principle . ... Abstract: The “Destropic Principle” is an argument that establishes that every universe is equiprobable, and the possibility of life is not a more special feature than any other. This opposes to the “anthropic principle” when it is used to argue that there is a necessity for a divinity, or multiple universes, in order to explain the configuration of our universe, particularly, the capability of harboring life. ... www.astronomy.net . ...

... Does the time it takes different methods to create all the elements coincide with the universeт??s accepted age? ... Illinois Urbana-Champaign) Different kinds of stars create elements at different rates, all of which are consistent with the age of the universe. Get instant access to subscriber content on Astronomy.com! ... Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below. ...

Preliminary results of astroclimate parameters measurements at the Sternberg 2.5m telescope installation site V.Kornilov, N.Shatsky, S.Potanin, O.Voziakova, B.Safonov Moscow, 2008 Acknowledgements A.Belinskiy M.Kornilov A.Tokovinin M.Kuznetsov P.Kortunov E.Gorbovskoy SAI administration some SAI students Pulkovo solar station (KHSS) staff RFBR support MAVEG Gmbh Why to study optical turbulence and some other relevant ... Mean seeing by DIMM data for this night is 1''5. ...

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . Support of activities at the Radio telescope General information Main characteristics of the Radio telescope Observing programs General view of the antenna array Main research areas Principle of generation of radio images Radio telescope 's beam Receiving systems Main characteristics of the base receiving-recording complex Calibrations Data archive and databases Publication of ... 9.4 GHz band. ...

... Space flight . ... Zero Gravity . ... Characteristics of a Complex Flight: . ... Characteristics of the Reduced Gravity (Lunar Gravitation): . ... Characteristics of the Reduced Gravity (Martian Gravitation): . ... Services / Zero Gravity: General description Technical description Flight parameters Photo gallery Price . ...

... public class CurveFitter . ... static int . ... Field Detail public static final int STRAIGHT_LINE . ... public static final int POLY2 . ... public static final int POLY3 . ... public static final int POLY4 . ... public static final int EXPONENTIAL . ... public static final int POWER . ... public static final int LOG . ... public static final int RODBARD . ... public static final int GAMMA_VARIATE . ... public static final int LOG2 . ... public static double f (int fit, double[] p, double x) . ...

... RC0302+0455 . RC0308+0454 . ... RC0355+0449 . Radio source parameters . ... R.A.(B1950) Dec.( B1950) Freq. ... Parameters of optical candidates for identification . R.A.(J2000) Dec.( J2000) R.A.(B1950) Dec.( B1950) Magn. ... J2000) angle fwhm (X:Y) 03:08:33.98 +04:54:10.5 . ...

. To the IUM main page . Semi-infinite variations of Hodge structures arise naturally over parameter spaces of non-commutative objects like associative algebras or A-infinity deformations of algebraic manifolds. In this talk I'll discuss relations of semi-infinite variations of Hodge structures with integrable hierarchies of KdV type.

... Астронет | ... The formation of chemical peculiarities in stellar atmospheres . ... Asymmetry in the variability of radio sources towards the centre and anti-centre of the galaxy . ... Mathematical methods in studying the structure and dynamics of gravitating systems . ... Mathematical methods in studying the structure and dynamics of gravitating systems: Preface . ... On the astronomical applications of the dynamics of hierarchical systems . ... Dynamics of gaseous disks of spiral galaxies . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Steering by Different Stars? Astronomers and the Dark-Sky Movement . ... Photo courtesy of the International Dark-Sky Association. by Susan McGowan . ... According to Arthur Upgren, senior research scientist at Yale University and emeritus professor of astronomy at Wesleyan University, only 17% of ASP members were also members of the International Dark-Sky Association in 2001. ...

This module supports ISAPI Extensions within Apache for Windows. ... This module implements the Internet Server extension API. It allows Internet Server extensions ( e.g. ISAPI .dll modules) to be served by Apache for Windows, subject to the noted restrictions. ISAPI extension modules (.dll files) are written by third parties. ... Review the Additional Notes and the Programmer's Journal for additional details and clarification of the specific ISAPI support offered by mod_isapi. ...

... arXiv.org . ... Although great progress has been made in modelling the disk with radiative transfer models able to reproduce the spectral energy distribution (SED) of Herbig Ae stars, the constraints brought by images have not been yet fully exploited. Here, we are interested in checking if these new observational imaging constraints can be accounted for by predictions based on existing models of passive centrally irradiated hydrostatic disks made to fit the SEDs of the Herbig Ae stars. ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

... part 2 | ... Part 1 . The new concept of formation and development of the Solar system. ... Thus, the initial pulse of the rotation of a protosolar cloud of the solar system was determined as a result of the diversion of a part of the moment of the rotational pulse of the Galaxy. ... Besides this new approach to the pre-solar system as a system of the destroyed vortex structure, we can understand now a number of other peculiarities of the Solar system's structure. ...

About V I spectral lines with overlay of Zeeman and hyperfine structure splitting in spectra of sunspot umbra S.G. Mozharovsky Ussuriysk Astrophysical Observatory of FEB RAS, Ussuriysk, Russia sw@newmail.ru Abstract. ... Overlay of components of the different types can allow obtain the parameters of the magnetic field by the ratio of the component intensities. ... The structure of Zeeman splitting which follows from the parameters of the line atomic levels can be seen in Figure 1. [pic] Figure 1. ...

... In electron-positron colliders, effect of the lattice modification by opposing bunch focusing on the equilibrium radiation emittance is important at high values of the space charge parameter, so one should correctly evaluate this dynamic radiation emittance of the weak beam, which may differ a lot from the nominal emittance, already in the linear beam-beam force model. ... The linearized beam-beam force is equivalent to focusing insertion in linear lattice of the collider. ...

... Hierarchy and stability 3. Stability criteria for triple systems 4. ... The results for selected systems with weak hierarchy (physical properties of components) System HD 40887 AB+CD HD 76644 AB+CD HD 217675 AB+CD HD 222326 A?+BC HD 284419 A+BC Spectral types K5V, M0V, K4V, ?? ... More accurate results for selected systems HD 217675/6 ( And) Quadruple system More accurate results for selected systems HD 217675/6 Pair B1B 2 More accurate results for selected systems HD 217675/6 (Zhuchkov et al. ...