VisIVOWeb Theory Group
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VisIVOWeb Theory Group Presentation Transcript

  • 1. VisIVOWeb: a web solution for visualizing cosmological simulations Alessandro Costa INAF Astrophysical Observatory of Catania, Italy Email: alessandro.costa(at)oact.inaf.it
  • 2. Let’s begin from … ITVO !   ITVO: Italian Theoretical Virtual Observatory !   The ITVO is part of a joint collaboration between Italian Insitute for Astrophysics (INAF) and CINECA supercomputing center !   ITVO has a number of different data centers and services groupped under a single point of access: “Theory” link in http://vobs.astro.it/ Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 3. Some interesting datasets in ITVO CT !   ITVO CT http://itvo.oact.inaf.it is an online data centerof cosmological simulations. !   The latest dataset in ITVO CT is the whole sequence of outcomes of a 512.000.000 particle simulation performed through a N-body algorithm , for three- dimensional self-gravitating collisionless systems evolution. !   It has been carried out by the cosmology group at INAF CATANIA using the grid of the COMETA Consortium http://www.consorzio-cometa.it/ Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 4. Data and services in ITVO CT !   Access to the row datasets (512.000.000 Particles -> 12GB ) !   Access to a quick look randomized dataset !   Default: 2.000.000 Particles !   Run time generated by the randomizer service !   Access to a run time generated sub-sample dataset: !   Spherical: run time generated !   Rectangular: run time generated Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 5. AHF results in ITVO CT Adaptive Mesh Investigations of Galaxy Assembly !   Access AHF results: !   Halos list !   Datasets representing particles contained in subunits- halos !   Datasets representing particles contained in field -halos !   Datasets representing particles contained in void-halos Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 6. Visualization services in ITVO CT !   Visualization services offered by VisIVOWeb !   Each dataset both existing or run time generated can be loaded seamlessly into one of the VisIVOWeb portals. Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 7. VisIVO Projects !   VisIVODesktop !   VisIVOServer !   VisIVOWeb
  • 8. VisIVOWeb http://visivoweb.oact.inaf.it !   VisIVOWeb is part of a joint collaboration between Italian Insitute for Astrophysics (INAF), CINECA supercomputing center and University of Portsmouth !   VisIVOWeb aims at providing our community with multidimensional online Visualization tool. !   VisIVOWeb is a network of portals !   INAF CT Italy !   INAF TS Italy !   University of Portsmouth UK Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 9. VisIVOWeb !   The primary goal of VisIVOWeb is: to aid the scientist understanding complex data. Outcomes of simulations become larger keeping up with the constant increase of computational power. (i.e. 12GB each time-step -> 512M Body Simulation). !   Images !   Animations Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 10. VisIVOWeb !   PHP 5 -> Joomla! 1.5 !   Mysql !   VisIVOServer (c++) !   VTK !   Splotch Open Source Projects !   JAVA GPL V2 SourceForge Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 11. VisIVOWeb: Authentication !   You can connect to VisIVOWeb in two ways: !   Registered user !   Anonymous !   Each user, both the authorized one and the anonymous, has its own staging area and he can upload and manage its own data: images, tables and movies without any interference with other user data. !   Anonymous : 4 day since the last access. At the and of this period all data will be removed from the system. Registered user: 2 months since the last access (some warning e-mails will be sent to the user before the end of the account lifetime) Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 12. VisIVOWeb Connect This technology allows a web archive to import a data file in a VisIVOWeb Portal. !   The dataset must to be accessible via its URL Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 13. VisIVOWeb: importing a dataset Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 14. VisIVOWeb Connect !   The service can be invoked using this syntax: !   http://VisIVOWeb Portal?url=URL&data_file=votable !   Accepted data files: votable, fly, fits, ascii, csv, GADGET2 visivoweb.oact.inaf.it/visivoweb/VisIVOWebConnect.php palantir7.oats.inaf.it/visivoweb/VisIVOWebConnect.php visivo.port.ac.uk/visivoweb/VisIVOWebConnect.php Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 15. ITVO&VisIVOWeb: a 10 minutes demo Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 16. Login and select a simulation !   Login into the INAF Catania portal: http://itvo.oact.inaf.it !   Build and submit a query. !   Select a dataset Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 17. AHF results !   When you select a simulation you can can download a tarball containing all the results of an AHF run. AHF (Amiga Halo Finder) Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 18. Access services !   Or you can access to “Level 1” services. Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 19. Access services !   Choose a service. Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 20. Access services !   Randomizer: allows you to randomize a simulation by choosing the percentage of particle to be randomly extracted. Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 21. Access services !   Sub-Volume: allows you to extract a spherical or rectangular sub-volume by choosing its geometry Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 22. Browse AHF halos datasets !   AHF halos: allows you to access two subset of particles representing: !   halos in subunits !   halos in void. Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 23. Overview !   Using the spherical sub-volume extraction on ITVO-CT data center we created a new dataset. !   Using VisIVOWeb Connect we imported this dataset into a VisIVOWeb portal. !   Through VisIVOWeb operation (Point Property) we associated a mass density to each particle using a Cloud-In-Cell (CIC) algorithm !   We visualized the dataset using both VTK and Splotch !   We built a movie of the dataset around some chosen frames
  • 24. Some short VisIVOWeb movies: VTK A spherical cutout from http://itvo.oact.inaf.it VTK visualization ftp://astrct.oact.inaf.it/pub/acosta/VisIVOWeb/Movies/movie7.gif Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 25. A spherical cutout from http://itvo.oact.inaf.it Splotch visualization ftp://astrct.oact.inaf.it/pub/acosta/VisIVOWeb/Movies/movie6.gif Alessandro Costa IVOA Interop. Meeting Nov.2009
  • 26. Particles in subunit-clusters 512.000.000 z=0.1 Cubic-Cutout 40Mpc VTK Visualization ftp://astrct.oact.inaf.it/pub/acosta/VisIVOWeb/Movies/movie9.gif
  • 27. Particles in subunit-clusters 512.000.000 z=0.1 Cubic-Cutout 40Mpc Splotch Visualization ftp://astrct.oact.inaf.it/pub/acosta/VisIVOWeb/Movies/movie10.gif
  • 28. Online tutorial on YouTube ViSIVOWeb online Tutorial !   http://www.youtube.com/view_play_list? p=A7ECAF614EAE7970&search_query=visivoweb VisIVOServer online tutorial !   http://www.youtube.com/view_play_list? p=A7ECAF614EAE7970&search_query=visivoserver Alessandro Costa IVOA Interop. Meeting Nov.2009