View source

== Contact Information ==

  Claudio T. Silva
  50 S. Central Campus Dr. RM 3190
  School of Computing
  University of Utah
  Salt Lake City, UT 84112
  801-587-7588 (office phone)

== General Information == 

I am an Associate Professor of [http://www.cs.utah.edu Computer Science] 
at the University of Utah, and a faculty member of the 
[http://www.sci.utah.edu SCI Institute].

Upon arriving at Utah in October 2003, I started the 
[http://vgc.sci.utah.edu Visualization and Geometric Computing] (VGC) group
that at any given time includes a number of post-doc, graduate, and undergraduate students.
We often also have both short and long-term visitors in our lab. 

I received a B.S. in mathematics from the
Federal University of Ceara (Brazil), M.S. and Ph.D. degrees in 
[http://www.cs.sunysb.edu Computer Science]
from the  State University of New York at Stony Brook. Right after graduation
I was a post-doc in the applied mathematics & statistics department at Stony Brook.

I spent several years in industry before becoming a full-time faculty member. During this time, 
I had the opportunity to be officially or un-officially associated with the following 
institutions: [http://www.research.ibm.com IBM], [http://www.research.att.com AT&T], [http://www.sandia.gov Sandia], 
[http://www.llnl.gov LLNL], [http://www.ams.sunysb.edu Stony Brook], [http://www.cse.ogi.edu OGI], and 
[http://www.cs.princeton.edu Princeton].

== Courses ==

[http://vgc.sci.utah.edu/classes/cs4960/2007/index.php/Main_Page CP SC 4960] (Spring 2007) - Programming Challenges

[http://vgc.sci.utah.edu/classes/cs7940/2007 CP SC 7940] (Spring 2007) - Scientific Visualization and Geometric Computing Seminar

[http://frodo.sci.utah.edu/wiki6962_2006/index.php/Main_Page CP SC 6962] (Fall 2006) - Algorithms

[http://frodo.sci.utah.edu/wiki4960/index.php/Main_Page CP SC 4960] (Spring 2006) - Programming Challenges

[http://frodo.sci.utah.edu/wiki7960/index.php/Main_Page CP SC 7960] (Spring 2006) - Geometry Processing

[http://frodo.sci.utah.edu/wiki6962/index.php/Main_Page CP SC 6962] (Fall 2005) - Algorithms

[http://frodo.sci.utah.edu/wiki7936/index.php/Main_Page CP SC 7936] (Fall 2005) - Graphics Seminar

== Projects ==

* [http://www.vistrails.org VisTrails]

* [http://afront.sourceforge.net afront]

== Research Interests ==

My research focuses on Computer Graphics, Scientific Visualization,
Applied Computational Geometry, and High-Performance Computing. Recent
(and ongoing) projects concentrate in the following topics: 
Point-Based Modeling and Rendering, 
Scalable Displays, 
Large-Scale 3D Scanning, 
Visibility Algorithms
Unstructured Volumetric Grids,
Out-Of-Core Algorithms for Scientific Visualization, 
Surface and Volume Simplification,
Parallel Rendering.

== Current Students and Postdocs == 

[http://www.sci.utah.edu/~eranders Erik Anderson], PhD student

[http://www.sci.utah.edu/~stevec Steve Callahan], PhD candidate (ABD); 
[http://www.sci.utah.edu/~csilva/papers/thesis/steve-callahan-ms-thesis.pdf MS thesis, May 2005]

Linh Ha, PhD student

[http://www.inf.uni-konstanz.de/~ochotta Tilo Ochotta], visiting PhD student

[http://www.sci.utah.edu/~emanuele Emanuele Santos], PhD student

[http://www.sci.utah.edu/~cscheid Carlos Eduardo Scheidegger], PhD student

[http://www.cs.utah.edu/~jmschrei John Schreiner], PhD candidate (ABD)

[http://www.sci.utah.edu/cgi-bin/SCIpersonnel.pl?username=natesmith Nathan Smith], Undergraduate student

[http://www.sci.utah.edu/~hvo Huy T. Vo], PhD student

Hao Wang, Undergraduate student

== Past Students and Postdocs ==

Evan Anderson, Undergraduate student @ Utah (08-12/2004)

[http://www.sci.utah.edu/~bavoil Louis Bavoil], MS student, defended 12/2006 @ Utah; 
[http://www.sci.utah.edu/~bavoil/research/thesis/ MS thesis]; engineer at NVIDIA

[http://www.cs.princeton.edu/~wtcorrea Wagner T. Correa], Ph.D. student, graduated 12/2003 @ Princeton; 
[http://www.sci.utah.edu/~csilva/papers/thesis/wagner-correa-thesis.pdf PhD thesis]; scientist at IBM Research

[http://orion.lcg.ufrj.br/~rfarias Ricardo Farias], Ph.D. student, graduated 06/2001 @ SUNY-Stony Brook;
[http://www.sci.utah.edu/~csilva/papers/thesis/ricardo-farias-thesis.pdf PhD thesis]; professor at UFRJ-Brazil.

[http://www.sci.utah.edu/~shachar Shachar Fleishman], Post-doc @ Utah (03/2004-11/2005), research intern @ AT&T (2000-1)

Walter Herrera-Jimenez, Graduate student @ OGI (2003)

[http://www.mat.puc-rio.br/~sinesio Sinesio Pesco], Post-doc @ OGI/Utah (03/2003-12/2004); professor at PUC-Rio.

Lourena Rocha, Research intern, OGI (03-11/2003)

Dirce Uesu, Post-doc @ OGI/Utah (03/2003-12/2004)

Wayne Tyler, Undergraduate student @ Utah.

<h2>Recent Collaborators</h2>

[http://www.inf.ufrgs.br/~comba Joao Comba], UFRGS-Brazil

[http://www.math.tau.ac.il/~dcor Daniel Cohen-Or], Tel Aviv 

[http://www.cs.sandia.gov/VIS/pat.html Pat Crossno], Sandia 

[http://www.cs.utah.edu/~juliana Juliana Freire], Utah

[http://www.research.ibm.com/people/j/jklosow James T. Klosowski], IBM

[http://www.ams.sunysb.edu/~jsbm Joe Mitchell], SUNY-Stony Brook

[http://www.llnl.gov/CASC/people/laney Dan Laney], LLNL

[http://www.cc.gatech.edu/~lindstro Peter Lindstrom], LLNL

[http://www.pascucci.org Valerio Pascucci], LLNL

[http://www.cs.utah.edu/~shirley Peter Shirley], Utah

== Publications ==

[http://www.sci.utah.edu/~csilva/papers/index.html Nearly complete list] (includes links to pdfs)

[http://www.informatik.uni-trier.de/~ley/db/indices/a-tree/s/Silva:Cl=aacute=udio_T=.html Incomplete list from DBLP]

[http://scholar.google.com/scholar?q=%22Claudio+Silva%22+OR+%22CT+Silva%22+OR+%22c-silva%22&num=30&hl=en&lr=&as_subj=eng&start=0&sa=N Incomplete list on Google Scholar]

== Tutorials ==

[http://www.sci.utah.edu/~csilva/papers/sc2002-m9.pdf High-Performance Visualization of Large and Complex Scientific Datasets]

[http://www.sci.utah.edu/~csilva/papers/vis2002-tutorial4.pdf Out-Of-Core Algorithms for Scientific Visualization and Computer Graphics]

[http://www.sci.utah.edu/~csilva/papers/course30.pdf Visibility, problems, techniques and applications]

[http://www.gris.uni-tuebingen.de/~bartz/tutorials Rendering and Visualization in Affordable Parallel Environments]

== Patents ==

[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=0&f=S&l=50&d=PTXT&RS=%28%28%28IN%2Fsilva+AND+IN%2Fclaudio%29+AND+AN%2FInternational%29+OR+%28%28%28IN%2Fclaudio+AND+IN%2Fsilva%29+AND+IN%2Fcorrea%29+AND+IN%2Fwagner%29%29&Refine=Refine+Search&Refine=Refine+Search&Query=+%28IN%2Fsilva+AND+IN%2Fclaudio+AND+%28AN%2FInternational%29%29+OR+%28in%2Fclaudio+AND+in%2Fsilva+AND+in%2Fcorrea+AND+in%2Fwagner%29+OR+%28in%2Fclaudio+AND+in%2Fsilva+AND+in%2Fbin+AND+in%2Fwei%29 The official USPTO list] (eight patents)

== Software (source code) ==

http://www.vistrails.org

http://afront.sourceforge.net, by Schreiner, Scheidegger, Fleishman and others.

http://havs.sourceforge.net, implementation of the Hardware-Assisted Visibility Sorting (HAVS) algorithm for rendering unstructured grids, by Callahan, Ikits, and others. Note that there is also a version of the HAVS algorithm implemented in VTK: [http://www.vtk.org/doc/nightly/html/classvtkHAVSVolumeMapper.html vtkHAVSVolumeMapper.html].

[http://www.cs.utah.edu/~csilva/software/gpu_volume_ray_casting.zip GPU-based ray caster for Unstructured Meshes], by Bernardon and Comba.

[http://www.sci.utah.edu/~bavoil/research/tetsimp/tmc TetMesh Comparator (tmc)], for measuring errors between two tet meshes, by Louis Bavoil.

[https://sourceforge.net/projects/gtb GTB: Graphics Toolbox], includes implementation of Correa's PhD thesis (in particular, '''iWalk''')

[http://www.cs.utah.edu/~csilva/software/gctin.tar.gz GcTin], Greedy-Cuts terrain triangulation.

[http://www.cs.utah.edu/~csilva/software/zsweep.zip ZSWEEP], implementation by R. Farias of the ZSWEEP algorithm. Note that Kitware has implemented ZSWEEP in the most recent version of [http://www.vtk.org VTK]. Here is a link to the class hierarchy:  [http://www.vtk.org/doc/nightly/html/classvtkUnstructuredGridVolumeZSweepMapper.html vtkUnstructuredGridVolumeZSweepMapper]. I have not tested their implementation against the original one, but this one is certainly easier to use, since it is fully integrated into both VTK and Paraview. I have been told this is the preferred way to generate high-quality images of unstructured grids in VTK.

[http://www.cs.utah.edu/~csilva/software/raytrace.tar.gz Raytrace], Unstructured-grid ray tracer, by Bunyk. This has also been implemented into VTK, see
[http://vtk.org/doc/nightly/html/classvtkUnstructuredGridBunykRayCastFunction.html vtkUnstructuredGridBunykRayCastFunction]

Here is a sample unstructured grid dataset: [http://www.cs.utah.edu/~csilva/data/spx.off spx.off]

[http://www.cs.utah.edu/~csilva/software/wylie-et-al-code.tar.gz Source code] of Wylie et al's vertex program for rendering a tetrahedron. Brian asked me to post this for him, since he did not have a webpage. See their paper at VolVis 2002 for details.

[http://www.cs.utah.edu/~csilva/software/oocsx.m oocsx.m], partial Mathematica implementation of the OoCSx algorithm.

== Links ==

[[GeneralReading]]

[[ScientificVisualization]]

[[ReproducibleScience]]

[[Websites]]

<H2>Sponsors</H2>

Our research is (or has been) funded by the Department of Energy under the SciDAC program ([http://www.scidac.org/compsci/SDM.html SDM] and [http://www.scidac.org/viz/VACET.html VACET] projects), [http://www.sandia.gov Sandia National Laboratories], [http://www.llnl.gov Lawrence Livermore National Laboratory], the [http://www.nsf.gov National Science Foundation] (grants [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0401498 CCF-0401498], [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0323604 EIA-0323604], [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0405402 OISE-0405402], [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0513692 IIS-0513692], [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0528201 CCF-0528201], [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0424602 OCE-0424602]), [http://www.ibm.com IBM] Faculty Awards (2005 and 2006), and a University of Utah Seed Grant.