... In our numerical experiments we have mainly considered two test objects provided by R. Hanisch and characterized by different types of brightness distribution; one of the objects simulates an elliptical galaxy and the other one a star cluster with size 512 512 and 256 256 pixels, respectively. ... The best performances in the restoration of the star cluster image are provided by the R-L algorithm and the LWPOS one; they give accuracies of 6%and 5%, respectively (see Table 1). ...

Atmospheric influence on the different radio-engineering system functioning . ESTIMATION OF ATMOSPHERIC OPTICAL CHARACTERISTICS AND REMOTELY SANSED IMAGE CORRECTION . ... Direct transmittance estimation results for 12 channels of the spectrometer CHRIS. ... We have managed to develop a direct method of estimating the discrete Normalized Atmospheric Point Spread Function (NAPSF) from available images alone, not using any external sources of information about the atmosphere. ... IRE RAS 1996-20 11 ...

Next: Related Table Commands Up: Multivariate Analysis Methods Previous: Discriminant Analysis . Correspondence Analysis may be described as a PCA in a different metric (the metric replaces the usual Euclidean metric). ... While PCA is particularly suitable for quantitative data, CA is recommendable for the following types of input data, which will subsequently be looked at more closely: frequencies, contingency tables, probabilities, categorical data, and mixed qualitative/categorical data. ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

... Archives . ... If you do not mind the time predictor, it is hard to believe that this is a light curve, time dependent data. ... It?s hard to say this data set is designed for time series analysis apart from the complication in statistical inference due to measurement errors. How to design the statistical study with measurement errors, huge gaps in time, and unequal time intervals is complex and unexplored. ... The following is R output without measurement errors. ... Chandra Blog . ...

Next: Jodrell Virgo Survey Up: Minutes of the 1st Previous: Survey Simulations . ... Drift mode: 12s/beam . ... Slow" OTF 6s/beam . ... Fast" OTF, RA-Dec, 3s/beam (drive in RA, step in Dec) . ... Fast" OTF, Dec-RA, 3s/beam (scan in DEC, step in RA) Setup and preliminary analysis: . ... Also look at power spectrum to look for harmonics in baselines: nothing apparent . ... baselines flat . ... Map sensitivity and baseline quality independent of mapping technique when you scan faster than the drift rate. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 November 23 . Tornado and Rainbow Over Kansas . ... During 2004 in Kansas , storm chaser Eric Nguyen photographed this budding twister in a different light -- the light of a rainbow . Featured here , a white tornado cloud descends from a dark storm cloud. ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... Future seminars . P a s t seminars . Seminar council . Linear and nonlinear vibrations in vortex lattices " . ... Zaburdaev, V.V. Smirnov, K.V. Chukbar (Kurchatov's Institute) . ... Evolution of “long-wave” perturbations in different regular lattices of different (i.e. with different flow functions) 2-d vortices is considered. ...

Chair of solid state physics . ... The Physics of Phonons . ... In the first part of the course “The Physics of Phonons” the dynamics of atoms in one- and three- dimensional crystalline lattices is considered in detail. The quasiparticle conception in solids, taking phonons as an example, is discussed; creation and annihilation operators of phonons, main properties of acoustic and optical phonons dispersion laws, density of phonon states. ... Crystalline state. ... Acoustic and optical phonons. ...

Next: The Stopping Radius in Up: ``Ecology'' of Magnetic Rotators Previous: The Environment of the . Now we consider qualitatively the effect of the electromagnetic field of a magnetic rotator on the accreting plasma. ... What is important is that both relativistic particles and magnetic dipole radiation will transfer their momentum and hence exert pressure on the accreting plasma. ... 2) The pressure of the accreting plasma is high enough to permit the plasma to enter the light cylinder . ...

Next: Spectral Line Processing and Up: Spectral Line Data Reduction Previous: ATCA Spectral Line Correlator . ... The ATCA allows you to observe two frequency setups simultaneously ifsel allows you to load just one of them by setting ifsel=1 or ifsel=2 . ... The RPFITS file does not contain the rest frequency of the spectral line observed, so you need to give this at some stage during data reduction - the earlier the better. The rest frequency can be entered (via restfreq , in GHz) in atlod . ...

... St Petersburg 23, September 2014 1 Motivation · Origin of Martian moons? ... Considered error sources: ­ Phobos a priori ephemerides; ­ Phobos a priori GM value; ­ measurements noise; ­ different strategies; · Methods: ­ real data analysis; ­ simulations. ... St Petersburg 23, September 2014 8 Simulations: sensitivity of the measurements to the a priori GM value Simulations: zero noise+ IMCCE a priori ephemerides +GMPH = 7.16 * 105 m3/sec2. ... St Petersburg 23, September 2014 14 Thank you! ...

... We study ergodic properties of random maps defined as collections of nonsingular maps $f_1,\dots,f_w$ from a compact metric space $(X,\rho)$ into itself taken with probabilities $p_1,\dots,p_w$ ($\sum_i^wp_i=1$) and considered as Markov processes on $X$. ... In the first situation, when the random map is expanding on average, we mainly follow ideas borrowed from the theory of piecewise expanding maps and the corresponding Banach space is a version of the space of functions of bounded variation on $X...

Next: SAS processing Up: Maintenance procedures Previous: Maintenance procedures Contents . Suitable observations should be longer than about 20 ksec, cover all the considered time period, and have different background levels, in particular the highest ones, so the sample should include observations taken at the beginning and end of the science window. It is helpful to consider objects for which no RGS spectrum is expected or to look at the RGS monitor pages. ... Michael Smith 2011-09-20 ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Quasi-stationary electron distributions for the different values of the particle escape time. ... The electron-cyclotron maser instability is widespread in the Universe, producing, e.g., radio emission of the magnetized planets and cool substellar objects. ... The model used takes into account the radiation escape from the source region and the particle flow through this region. ...

... Up: Data Compression . Previous: Cosmic Ray Rejection with NGST . ... The concept of Automatic Programming and Managing of simulations is applied to the compression of the data stream expected from the Low Frequency Instrument (LFI) aboard Planck Surveyor, the next millennium European Space Agency (ESA) satellite for imaging the Cosmic Microwave Background (CMB). ... Mandolesi, N., et al. 1998a, ``Low Frequency Instrument for Planck'', Proposal submitted to ESA . ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

... Russian KOI8 . ... Radio galaxies and cosmology [in Russian]) . ... The book is devoted to investigations of powerful radio galaxies in the different wavelength ranges. ... The history of study for radio galaxies is given and the outlook on radio galaxy exploring is considered. ... The cosmological tests to check the Universe evolution parameters constructed on the observational data of radio galaxies are considered in details. ... List of detected misprints (in Russian). ...

spaceweb@oulu.fi - last update: 5 January 1999, 1500 UT (RR) . Geomagnetic pulsations, i.e., ultra-low-frequency (ULF) waves cover roughly the frequency range from 1 mHz to 1 Hz , i.e., from the lowest the magnetospheric cavity can support up to the various ion gyrofrequencies . ... Pulsation classes . ... Pulsations are studied with in situ observations in space of both magnetic and electric fields, and with ground-based magnetometers . ... correlation with IMF/solar wind parameters . ...

... Apache HTTP Server Version 2.2 . ... Allows the setting of environment variables based on characteristics of the request . ... setenvif_module . ... The mod_setenvif module allows you to set internal environment variables according to whether different aspects of the request match regular expressions you specify. ... Environment Variables in Apache . ... The BrowserMatch is a special cases of the SetEnvIf directive that sets environment variables conditional on the User-Agent HTTP request header. ...