Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

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• Imaging by an Optimizing Method
• ADASS 2003 Conference Proceedings
• ADASS 2002 Conference Proceedings

Next: Initial conditions Up: Old neutron star distribution Previous: Introduction . The problem to be solved is to find stationary space distribution of stars which have had certain initial space and velocity distributions and move in a given potential. ... In principle, the most straightforward way to obtain the solution is to integrate directly the equations of motion for a sufficiently large number of stars with different initial conditions. ... Then space density is given by . ...

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• ADS Abstract Service Results
• No Title
• Introduction

. Comparison of conditionally periodic solutions with the results of numerical integration in the two rigid body problem . N. Yu. Saburova . Arkhangelsk State Technical University, Arkhangelsk, Russia Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, conditionally periodic solutions, numerical integration, two rigid body problem.

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• Keywords_296
• Keywords_22
• Keywords_216

... CURRENT ASPECTS OF REMOTE SENSING OF EARTH FROM SPACE . ... For developing of the scientific concept and the programs of global monitoring of the Earth from space and pursuant to the disposal of Presidium of Russian Academy of Sciences # 10310-717 (August 11, 2004 ) Space Research Institute RAS and Center of Space Observations of the Russian Space Agency during November 16-18, 2004 conduct the Second Opened All-Russia conference ' Current Aspects of Remote ...

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• Space Research Institute (IKI) Seminar

... 1,2]. this article we considered the problem of development of mathematical logic programming of intelligent agents for searching, recognizing, collecting g information in the Internet. ... http://www.cplire.ru/Lab144/index.html) 5. .. : - . ... Moscow, 1999. ­ pp. 54-59. (http://www.cplire.ru/Lab144/internet.pdf) 8. ... Morozov A.A., Obukhov Yu.V. An Approach to Logic Programming of Intelligent Agents for Searching and Recognizing Information on the Internet // Pattern Recognition and Image...

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• http://www.cplire.ru/html/lab234/pubs/2012_14.pdf
• Transmission of Sequences of Chaotic Samples Through RF Channel - Radiotekhnika
• Interesting Sites Related to Chaos - InformChaos Lab.

... Posts tagged ?inverse problem? ... Soon it?ll not be qualified for [MADS] because I saw some abstracts with the phrase, compressed sensing from arxiv.org. ... MADS] compressed sensing? Tags: compressed sensing , ill-posed , image reconstruction , interferometry , inverse problem , MADS , Nyquist-Shannon sampling theorem . ... From arxiv/math.st:0708.0169v1 . Data-Driven Goodness-of-Fit Tests by L. Mikhail . ... ArXiv] Data-Driven Goodness-of-Fit Tests, Aug. ... SAMSI AstroStat Prog. ...

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• Jonathan's ASC/SDS documents
• xterm compatibility problems
• The AstroStat Slog Blog Archive Change Point Problem

Next: Introduction . ... In the general framework of regularization of inverse problems, we define the main contours of the reconstruction algorithm IDEA ( Interactive Deconvolution with Error Analysis ) that is developed in our group, giving only some methodological principles. ... Keywords: inverse problems, deconvolution, supernova SN1987A . Introduction . IDEA: Methodological Principles . Example of Deconvolution: The HST Image of SN1987A . ...

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• Towards HST Restoration with a Space-Variant PSF, Cosmic Rays and Other Missing
• Some Problems of Practical Image Restoration
• WFPC2 ISR Abstract

... Paul J. Francis . ... 3mm] Joint appointment with the Research School of Astronomy and Astrophysics . I present a way of adapting the techniques of Problem Based Learning (PBL) to undergraduate astronomy classes. A fictitious astronomical mystery is invented, and presented to the class. The students, working in small groups, propose observations to crack the mystery. ... Two case studies of this technique are presented and discussed. ... Student Briefing . Running the Exercise . ...

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... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Development of Organizational Structure . Company's History . ... History . Brief History of Rocket and Space Technology . Rocket Systems . Flights Chronology . ... ISS Russian Segment . ... Sea Launch . ... of the Energia-Buran Space System . ... Among problems solved while developing the Energia-Buran Reusable Space System were: . ... Contribution of RSC Energia to the Russian Rocket-Space Technology . ...

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• S.P.Korolev RSC Energia - LAUNCHERS
• INTERNATIONAL SPACE STATION
• OFFICIAL PRESS RELEASE - S.P. KOROLEV ROCKET & SPACE CORPORATION ENERGIA

... Введение . ... ГАЛАКТИКИ С БАРОМ . Рассматриваются различные современные проблемы физики галактик с баром. ... A various modern problems of SB-galaxies physics are considered. The conditions of double bars formation, the shaping mechanisms of asymmetric structures (bar displacement), the conditions of stellar bars destruction, the kinematic features of SB-galaxies are discussed. ... Публикации с ключевыми словами: галактика - бар . Публикации со словами: галактика - бар . ...

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Subject of Celestial Mechanics. ... Differential Absolute Coordinates Equations of the Problem. ... General Integral of Non-Perturbed Motion. ... General Equation of Non-Perturbed Orbit. ... Other Integration Methods of Non-Perturbed Motion Differential Equations; Bine Equation for Case of Non-Perturbed Motion. ... Ellipsical Motion, Kepler Equation. ... Motion Differential Equations in Absolute Coordinates. ... Equation of System of Bodies Motion in Barycentric Coordinates, in Relative Coordinates. ...

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• Theoretical Astrophysics

... A well known problem with EOP prediction is that a prediction strategy proved to be the best for some testing period and prediction length may not remain as such for other period of time. In this paper we consider possible strategies to combine EOP predictions made using different analysis techniques to obtain a final prediction with the best accuracy corresponding to the least prediction error between input predictions. ... C2 ­ best previous prediction for given length. ...

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• The conference " Multi-Wavelength investigations of the Sun and modern problems

... The main research task of the LRS was an investigation of interstellar medium of our Galaxy using its line emission in radio domain with the help of the gratest RATAN-600 Radio Telescope. ... The complex investigation of the Interstellar Clouds structure on the different scales and with the different radio lines for understanding of structure, dynamics and evolution of interstar gas and its interaction with other galactic constituents and the conditions for star formation. ...

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• On the problem of high spectral resolution observations of faint objects
• The conference " Multi-Wavelength investigations of the Sun and modern problems
• [NEdit] FAQ: Diagnosing and reporting problems

... The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the Further Information and Bibliography page. The Building and Installing the Distribution page presents an overview of the procedures for compiling the distribution and installing it on a typical client or server. ...

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• Sysadm
• Abstract Registration Form - INTERNATIONAL SYMPOSIUM "ASTRONOMY - 2005: CURRENT
• SAI Supernova catalog

... Assured of a reliable method of solving the normal equations, we now consider the equations of condition. The observed magnitude m of a star at M air masses with true instrumental magnitude is modelled as ([ 10 ], [ 28 ]) . ... The effective extinction coefficient depends on the effective spectral gradient [ 29 ] of the star, for which we use some color index, affected by half the atmospheric reddening ([ 26 ], [ 10 ]): . ... Thus, for the B band of UBV, we use the (U-V) color. ...

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• The bias problem
• Local Keywords
• HyperLEDA Internal documentation

Recursive solution of light scattering problem for multi-layered axisymmetric particles V.G.Farafonov St.Petersburg University of Aerocosmic Instrumentation St.Petersburg, 190000, Russia and V.B.Il'in Astronomical Institute, St.Petersburg University, St.Petersburg, 198504, Russia ABSTRACT Light scattering by inhomogeneous (layered) particles is the problem that often arises in optics of the atmosphere and ocean, biophysics, astrophysics, etc [1]. ... Farafonov V.G., Il'in V.B. (2000) Opt. ...

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• http://www.astro.spbu.ru/staff/ilin2/INTAS/P3-SPB1/CONF/ABSTR/fli-dd1.txt
• http://www.astro.spbu.ru/staff/ilin2/INTAS/P3-SPB1/CONF/ABSTR/fil-dd1.txt
• http://www.astro.spbu.ru/staff/ilin2/PAPERS/JQSRT99A/abstract

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

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• The XX International Astronomy Olympiad, Problems
• IV International Astronomy Olympiad, Problems to solve
• II International Astronomy Olympiad, Problems to solve

How Do Children Learn? ... Here we propose an innovative approach to children's learning, one that integrates the transmission, constructivism, and social constructivism models by having teachers present some of the fundamental concepts involved in astronomy education at the elementary level. ... learn the story . ... Before presenting sample stories and curricular ideas, we must discuss some of the impediments, pedagogical and professional, to teaching and learning astronomy at the elementary level. ...

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• ASP: A High School Curriculum in Astrobiology

... The RCB carbon abundance remains an enigma ([ Asplund et al. ... The strength of a stellar absorption line represents the ratio of line opacity to continuous opacity in the atmosphere; both are related to the number density of the absorbing atoms and so provide the number ratio of line absorbers to continuum absorbers. ... Since the predominant continuum absorber in RCB atmospheres is neutral carbon, it has not yet proved possible to measure the carbon abundance from carbon absorption lines. ...

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• Unsolved Problems
• Abstract
• Risk and Natural Catastrophes

... Events INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY PROBLEMS AND PROSPECT OF THE PROPULSION ENGINEERING DEVELOPMENT . ... INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY PROBLEMS AND PROSPECT OF THE PROPULSION ENGINEERING DEVELOPMENT . ... Development prospects and use of engines for aviation, space - rocket systems, motor transport mechanical engineering and stationary power supply installations . ... Propulsion engineering, power engineering and space vehicle ecology problems . ...

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• XII National meeting on management problems
• International Scientific Conference "Problems and Perspectives of Engine
• International scientific and technical conference 'Problems and prospects of