GeoWall Visualizations
These visualizations are available free of charge for personal and educational uses only. Unless otherwise noted, all materials are copyrighted to the Center for Environmental Kinetics Analysis and The Pennsylvania State University. All rights reserved. Please contact Chuck Anderson with any questions or problems with the files.
 
Water and Oxygen Diffusion around a Pyrite Grain

Animating script for data from a molecular dynamics simulation of water and oxygen molecules diffusing around a sub-microscopic pyrite grain (~ 10 x 10 x 10 atoms in size). The simulation shows molecular vibration (thermal vibration) as well as diffusion around the pyrite grain (in this simulation the pyrite grain atoms are held fixed). Molecular dynamics simulation run by Jim Kubicki, Center for Environmental Kinetics Analysis, Penn State University

Model data visualized using VTK, an open source visualization package available at www.vtk.org. VTK is a powerful yet easy to learn scripting language compatible with any GeoWall capable of running clone mode stereo. This script is authored in Tcl/Tk and can readily be modified to work with other datasets.

Data files and script  (4.3MB)
 

Periclase (MgO) Crystallization Movies

Stereo movie files generated from a molecular dynamics simulation of periclase (MgO) crystallization by Lee and Kubicki (1993). Model spans 10 ps (10 x 10-12 seconds!) of real time and shows the phase transition between a supercooled liquid and crystal at 2500K. The phase transition is marked by a change from tetrahedral to octahedral Mg coordination. In the animation, Mg atoms are red-orange and O atoms are green. Both are set to a radius of .5 Å and the bond distances are ~ 2 Å. Two crystals with different orientations form during the movie which is why only part of the simulation cell has atomic planes aligned with the eye of the viewer.

The stereo movies are 1280x480 resolution AVI files and look reasonable when expanded to full screen in QuickTime Player Pro. Higher image quality and playback performance is possible by downloading the left & right 640x480 MPEG movie pairs and viewing them with the free StereoMovie Maker application available from http://stereo.jpn.org/eng/stvmkr/. StereoMovie maker will play the movies in stereo using either horizontal span or clone mode.

Movies showing bonds                  Movies without bonds
L/R pair (290MB)                              L/R pair (178MB)
Stereo movie (159MB)                     Stereo Movie(143MB)

Lee, W.J. and J.D. Kubicki, Molecular Dynamics Simulation of Periclase Crystallization, Geophysical Research Letters, Vol. 20, No. 19 2103-2106, 1993
 

Silicate Mineral Models
Interactive 3D models of common silicate minerals and the basic SiO structure of silicate mineral classes. Models displayed in web browser using MDL's Chime plug-in (http://www.mdl.com/products/framework/chime/index.jsp). To view in stereo, set browser to full screen on a GeoWall running in horizontal span mode. The file index.html launches the stereo version with a list of models. Clicking "Basic Tetrahedral Structures" on this page leads into a stepwise tour of basic mineral structures with an example mineral of each. The file web-index.html launches a non-stereo version that can be used on desktop computers and non-stereo displays.

Pdb model files used in this package come from The Virtual Museum of Minerals and Molecules (http://virtual-museum.soils.wisc.edu/displays.html) and Mineral Web (http://www.minweb.co.uk/).

Mineral Models (400KB)
 

Antarctic Ice Growth

Antarctic ice growth predicted by a 3-D dynamical ice model, in an idealized simulation of ice growth starting from an ice-free continent and spanning 800 thousand years. The ice-sheet model is driven by surface snowfall and melt calculated by a Global Climate Model, including relatively fast Milankovitch orbital variations (20,000 to 40,000 year periods) and a long-term gradual decline of atmospheric CO2 and ocean temperatures. Modeling by David Pollard, Earth and Environmental Systems Institute.

Model data visualized using VTK, an open source visualization package available at www.vtk.org. VTK is a powerful yet easy to learn scripting language compatible with any GeoWall capable of running clone mode stereo. This script is authored in Tcl/Tk and can readily be modified to work with other x,y, elevation data sets.

Data files and script  (19MB)
 

Lewistown, PA Geologic Map, Topographic Map and Orthophotography Draped on DEM
Interactive 3D model of Lewistown, PA quadrangle topography (DEM) with either the topographic map, geologic map or high-resolution color orthophotography draped on topography. User can also display cutaway view of topography and a cross section view of underlying geologic units. Lewistown is in the heart of the Appalachian Valley and Ride province and provides a good example of the relationship between geology and topography in an old mountain range.

Model data visualized using VTK, an open source visualization package available at www.vtk.org. This script is authored in Tcl/Tk and can readily be modified to work with other DEM data sets and accompanying imagery.

Data files and script (53MB)
 
 
GeoWall Tools
Modified version of alignment image with different colored grid on left and right side

ArcGrid2VTK Script to convert ArcGrid format DEMs to VTK files. Script reoders values to account for VTK starting rasters in lower left instead of upper left corner.
 
GeoWall Hardware
Cart base for mobile GeoWalls

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Disciplines represented in CEKA
 
Biochemistry & Molecular Biology | Chemistry | Civil & Environmental Engineering | Crop & Soil Sciences |
Geosciences | Materials Science & Engineering | Energy & Geo-Environmental Engineering
  
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