Long Abstracts of Papers
in the AVS '94 Proceedings
FYI, these are the long abstracts upon which the
short 1-2 sentence presentation descriptions
in the Advance Program of AVS '94 were based.
DEVELOPING APPLICATIONS WITH AVS INC. PRODUCTS TRACK
AVStool: An Interface to the AVS Command Line Interpreter.
11 - 11:45 a.m. Monday
Bruce S. Duncan and Arthur J. Olson
The Scripps Research Institute, La Jolla, CA
The AVS Command Line Interpreter (CLI) provides a simple
method to control the operation of AVS. The CLI, however, does
not provide many programming features. AVStool is a simple
interface to the CLI that provides additional functionality. AVStool is
written in Perl, an interpreted language that combines features of C,
awk, sh, and csh. AVStool allows users can access the AVS CLI
using the Perl language. AVStool is not an interpreter, it is a simple
interface between the AVS CLI and the Perl interpreter. There are
Perl functions that implement most CLI commands. With AVStool,
users can write Perl functions that can be combined to perform
repetitive or complex tasks.
The Spline Animator: Smooth Camera Motion for AVS Animation. 1 -
1:45 p.m. Monday
Mark Astley and Mitch Roth
Arctic Region Supercomputing Center, Fairbanks, AK
The motivation for developing this AVS module came from a desire
to produce aircraft-like behavior in AVS flyby animation sequences.
That is, we wished to produce
smoothly banked turns, dives and climbs. Although the AVS
Animator module is a powerful tool for generating a variety of
animation sequences, our best attempts always produced jerky or
unpredictable motion in flybys.
The Spline Animator is an AVS module which facilitates the use of
smooth camera motion in AVS animations. In
particular, the module features a highly intuitive interface which
allows the user to define a set of keyframes which determine the
resulting camera path. The module then generates smooth camera
motion by interpolating these keyframes with uniform cubic splines.
The Spline Animator allows the user to create a camera path in one
of three ways: A CLI script, real-time playback, or a geometry
representing the splined flightpath. The primary output of the
module is a CLI script which can be modified as necessary to suit
particular needs. Paths generated by the Spline Animator may also
be played back directly using the Play and Reverse buttons on the
interface. Finally, by selecting the Show Flightpath button the user
may view the camera path as a geometry in the current scene.
Our first output from the Spline Animator produced a
camera path which was far smoother than we were ever
able to achieve with the AVS Animator. Merely by setting a few
keyframes we were able to produce the desired
sequence in minutes. Using the Spline Animator, smooth
AVS camera motion may now be achieved with relatively
little effort. This paper discusses the theory, implementation and
use of the module, along with examples of simple flybys and flight
paths generated by the module.
AVS Interface Routines.
2 - 2:45 p.m. Monday
Jan Kraak, University of Groningen, The Netherlands
AVS Interface Routines (AVSI_routines) AVSI_routines establish an easy
interface between FORTRAN and C application programs and the majority of the
1D, 2D, 3D and 4D visualisation techniques of AVS. The use of these routines
does not require knowledge of AVS fields and networks. For instance, the routine
call AVSI_3D_scalar_real_uniform ('Isosurface', 'iso', dim1, dim2, dim3, s3)
displays 3D data stored in the array s3(dim1, dim2, dim3) as an isosurface, which
can further be manipulated by the usual AVS point-and-click interface. If desired,
the networks and fields generated by the AVSI_Routines form a starting point to
explore the full flexibility of AVS. In the process of designing these routines the
omission of some functionality in AVS became apparent. Some examples of the
interface routines will be presented.
AVSFOOL: A Very Simple Field Operation Oriented Language.
3 - 3:45 p.m. Monday
Krzysztof (Chris) S. Nowinski, Warsaw University
Warsaw, Poland
AVS mechanisms of algebraic manipulations on the fields
are rather clumsy requiring connection of lots of "field
math" modules to perform even simple arithmetic. At the
Institute, we are currently developing a module forming an
environment (editor, interpreter and i/o handler for what we call
AVSFOOL (see title).An example of AVSFOOL
program generating an animation of square plate heated by a
rotating burner is shown:
Developing Interactive Parallel Programs on IBM SP-1 within AVS
Framework.
4 - 4:45 p.m. Monday
Gang Cheng, Northeast Parallel Architectures Center
During the past two years, NPAC(Northeast Parallel Architectures Center) at
Syracuse University has actively engaged in the research of software integration
methodologies and environments on massively parallel computers and
heterogeneous distributed systems. We use AVS as a system integrating tool in
several research and application projects which require interactive data
visualization and high performance computing and communication. We have
successfully developed real-time parallel numerical simulation/modeling
applications in AVS on several parallel systems, including Thinking Machines
Connection Machine 2 and 5, Maspar's DECmpp-12000 and networked
heterogeneous workstation clusters. We use AVS to combine sequential, data
parallel, and message passing modules in a heterogenous environment. Our
latest work is on the SP-1, IBM's newest parallel distributed-memory computer
designed using powerful RISC technology combined with a high-speed switch. In
this paper, we report initial work in developing interactive parallel programs on an
IBM SP-1 within AVS to allow real-time control of modeling system and
dynamically steering of model parameters We use a stock option price modeling
application as a case study, and a portable message passing interface
PVM(Parallel Virtual Machine) as the parallel programming environment on an
Ethernet-connected SP-1. We focus our discussion on programming integration
issues when porting parallel programs to the SP-1 within an AVS data-flow
integration model. We also discuss integration with other non-portable
programming environments on the switch-connected SP-1
My Experiences Writing AVS Modules.
9 - 9:45 a.m. Tuesday
Evelyn L. Wright
U.S. Geological Survey
The ability to write specialized AVS modules has been
invaluable in enabling us to provide visualization support
for a wide variety of scientific projects. The discussion of my experiences
writing modules is intended to encourage and aid novice developers. Topics
discussed include: motivation for writing modules; general principles; design and
development considerations; and strategies for interfacing with existing software.
The development of severalspecific modules is described, including modules with
simple widgets coded for specialized applications and modules with hierarchical
menu systems for generalized applications.
C++ Module Generator For AVS.
10 - 10:45 a.m. Tuesday
T. Ming Jiang
Arctic Region Supercomputing Center
The Application Visualization System, AVS, is an interactive tool for
scientific visualization. The AVS system allows users to dynamically
connect software modules to create data flow networks for scientific
computation and visualization. The object-oriented C++ CPPMod
Generator extends the AVS Module Generator and generates the
object-oriented modules in C++ language for developing new
modules. The CPPMod Generator module is implemented in C
language. It is an AVS module, which generates skeleton code in
C++ language, Makefiles, and documentation templates of object-
oriented modules.
Technical Overview of UAMGUIDES: Urban Airshed Model with a
Graphical User Interface and Decision Support
11 - 11:45 a.m. Tuesday
K. Eng Pua
MCNC, Research Triangle Park, NC
UAMGUIDES was designed to assist in the meticulous task of
running the Urban Airshed Model (UAM) through the use of
advanced graphical user interface and scientific visualization
techniques. The system was built on top of the X-Window/Motif
Toolkits and the Application Visualization System (AVS) in a
distributed UNIX environment consisting of a remote server (Cray
Y-MP) and various local workstations. One of the key functions of
the graphical user interface is to streamline the sometimes daunting
task of preparing the large amount of input data needed to run the
UAM. To achieve this end, a point-and-click menu driven system
was implemented to lead the user through all the necessary steps
to prepare input files to the model, while providing safeguards at
each step.
The user interface is also supported by a database
management system whose function include automatic
creation of index files related to a given study, retrieving the
database from and saving it to a remote secondary storage,
transferring data sets between different users for collaboration
purposes, and other database maintenance facilities.
The scientific visualization techniques were utilized to
create 2D, 3D, and 4D graphic displays for both data quality
assurance and model result analysis. With the help of many
advanced features provided by the AVS, a series of point-and-click
interactive graphics displays were created to help the user gain
new insights in his data sets. In this paper, I will present a technical
overview of UAMGUIDES and summarize the lessons learned in
using AVS to implement the system.
An Intelligent Assistant for Creating Data Flow Visualization
Networks.
1 - 1:45 p.m. Tuesday
Peter Kochevar, San Diego Supercomputer Center
Non-visualization experts, including most scientists, find
visualization systems like AVS too difficult to use. One approach to
assisting these end-users in doing interactive visualization is to
embed the knowledge of visualization experts into an intelligent
system. A prototype of just such a system has been developed as
part of the Sequoia 2000 Project. In this system, a Planner makes
use of expert knowledge stored in a Knowledge Base in order to
create data-flow visualization programs. The Planner takes as input
a description of the data to be visualized and an indication of the
data analysis goals of an end-user. From this information, an AVS
network script is produced that when executed, builds an
appropriate visualization of the indicated data set. The networks so
produced make use of both a restricted set of standard AVS
modules and a collection of custom ones which operate on data
structured as fiber bundles.
Coroutine Synchronization in AVS.
2 - 2:45 p.m. Tuesday
Gudrun J. Klinker, Digital Equipment Corporation
The current AVS flow executive provides only limited mechanisms for coroutines
to synchronize with other coroutines or modules: they can only be run either
synchronously with the entire network or completely asynchronously. In many
real-time applications, responding to user interaction or to real-time sensors (live
camera input), finer-grained synchronization control is needed. This paper
presents a token-based handshaking scheme which can be instantiated at
runtime between any subgroups of modules and coroutines, allowing users to
define control flow in the network, as well as data flow.
An Experiment to build "Wrap Around" GUI for Scientific Models using
AVS.
3 - 3:45 p.m. Tuesday
Jeff Wang, MCNC, Research Triangle Park
Building a graphical interface (GUI) using AVS can be a great
challenge at times. AVS provides a ready to use widget set and a
powerful layout editor to allow easy construction of GUI's, but when
a GUI developer wants to have more controls on the low level I/O,
file management, and memory management or when the developer
wants to create a complex system involving complicated tasks, AVS
becomes a barrier between them and the basic UNIX operating
system. In the NC Air Compliance Program, we have had a chance
to test and stretch AVS's ability to build GUI's wrapping around an
environmental model. In this experiment, an air pollution emission
pre-processing system (EPS) for the Urban Airshed Model (UAM) is
used as a target to build a GUI around. EPS is a modular system
which contains 20 FORTRAN programs, each of which computes
an independent step of emission data processing. For different
emission modeling tasks, a different set of these programs are
evoked. The objective of the experiment is to build a GUI around
each of the programs so that each of them is a separate AVS
module. Then, the related AVS modules are ported together to
form task networks. Finally, front end AVS modules are built to
serve as drivers to activate one of the tasks by a single button click
and everything is built inside the AVS framework. The interface
system is called the Graphical Emission Preprocessing System
(GEPS) and has helped produce gridded emission data for UAM as
well as effective visualization of the data sets. However, during the
development we have had to extend our effort to overcome some of
the inconveniences as a result of AVS serving as a "middle man".
Those some of the original designs proved efficient, others fail due
to over the limit resource consumption. This paper offers to share
our successes and failures during this development.
Developing the Aurora Scientific Visualization Database to work
with AVS.
9 - 9:45 a.m. Wednesday
Mike Achenbach, XIDAK, Inc.
WebWeaver - A Better "Field To Mesh" Module.
10 - 10:45 a.m. Wednesday
Srinivas R. Manapragada, Landmark Graphics Corporation
An Integrated Space and Atmospheric Science System Application of
AVS.
11 - 11:45 a.m. Wednesday
E. P. Szuszczewicz
Science Applications International Corporation (SAIC)
Make your AVS Pictures Look Great.
1 - 1:45 p.m. Wednesday
Michael Pique, The Scripps Research Institute
Many 3-D pictures aren't as informative or as effective as they
could be because the creators are unaware of some simple tricks
and proven-powerful techniques. I will explain and illustrate
the assumptions behind AVS's Gouraud lighting model and show
how to use it to your advantage, demonstrate a standard three-light
environment copied from photography, show how AVS can do
"haloed lines" that dramatically emphasize foreground-background
relationships, and show a simple image-compositing network that
offers superb object-inside-object transparency even using AVS
renderers that themselves do not provide quality transparency.
These tips will be helpful to anyone using AVS for geometric rendering.
AVS AND UNIRAS PRODUCTS AND TECHNOLOGY TRACK
AVS6 - System Overview
11 - 11:45 a.m. Monday
Ham Lord
Advanced Visual Systems Inc., Waltham, MA
AVS6 - Framework Architecture
1 - 1:45 p.m. Monday
Jeff Vroom, Advanced Visual Systems Inc.
Visual Programming with X
2 - 2:45 p.m. Monday
Mikael Jern, AVS/Uniras, Copenhagen, Denmark
AVS5 - Advanced Application Development Techniques
3 - 3:45 p.m. Monday
Ian Curington
Advanced Visual Systems Inc.
Surrey, England
AVS6 - Execution Model and Distributed Architecture
4 - 4:45 p.m. Monday
Jeff Vroom
Advanced Visual Systems Inc.
Waltham, MA
AVS6 - System Overview
9 - 9:45 a.m. Tuesday
Ham Lord
Advanced Visual Systems Inc.
Waltham, MA
2D Data Visualization Using Programmable Components
10 - 10:45 a.m. Tuesday
Using the Toolmaster visual data analysis libraries for 2D data
visualization.
Val Schmidt
AVS/Uniras
Copenhagen, Denmark
AVS6 - Integrated Data Display
11 - 11:45 a.m. Tuesday
Robert Mazaika
Advanced Visual Systems Inc.
Waltham, MA
AVS6 - Designing User Interfaces
1 - 1:45 p.m. Tuesday
Chris Hall, Advanced Visual Systems Inc.
Waltham, MA
AVS5 - Manipulating Geometric Data
2 - 2:45 p.m. Tuesday
John Sheehan
Advanced Visual Systems Inc.
Waltham, MA
Reusable Visualization Components for Application Development 3 -
3:45 p.m. Tuesday
Val Schmidt
AVS/Uniras
Copenhagen, Denmark
Object-Oriented Application Development with AVS6
9 - 9:45 a.m. Wednesday
Dave Kamins
Advanced Visual Systems Inc.
Waltham, MA
AVS6 - Writing and Customizing Visual Data Objects Part 1 -
Importing Existing Code
10 - 10:45 a.m. Wednesday
John Poduska
Advanced Visual Systems Inc.
Waltham, MA
AVS6 - Writing and Customizing Visual Data Objects Part 2 -
Importing AVS Modules and Applications
11 - 11:45 a.m. Wednesday
Larry Gelberg
Advanced Visual Systems Inc.
Waltham, MA
AVS6 - Writing and Customizing Visual Data Objects Part 3 - Using
Field Data and AVS6 Visual Data Objects
1 - 1:45 p.m. Wednesday
Alex Yarmarkovich
Advanced Visual Systems Inc.
Waltham, MA.
USERS EXAMPLES AND CASE STUDIES TRACK
ENVIRONMENTAL/EARTH SCIENCES TRACK
Chemical Flooding in a Virtual Environment - A Survivor's Guide to
VR Development.
3 - 3:45 p.m. Monday
Wes Bethel
Lawrence Berkeley Laboratory
Berkeley, CA
A Climate Simulation Study
11 - 11:45 a.m. Tuesday
Philip C. Chen, Fujitsu America, Inc.
This is a continuation of the climate case study presented in the last
year's AVS user group conference. Since last year, more simulation
data have been obtained. It is possible to visualize time varying
data with animation. In this study, existing and newly constructed
networks containing AVS modules will be used for analyzing basic
and derived meteorological parameters. The basic parameters
include temperature, humidity and velocity. The derived parameters
include momentum exchange, kinetic energy transport and thermal
energy transfer. Visualization of these parameters will elucidate
atmospheric general circulation dynamics.Paper Category:
Environmental Sciences
Displaying and Accessing Environmental Sciences Modeling Data with
AVS. 1 - 1:45 p.m. Tuesday
Kathy Pearson
MCNC
Research Triangle Park, NC
Visualization of Volcanic Ash Clouds.
2 - 2:45 p.m. Tuesday
Mitch Roth
Arctic Region Supercomputing Center
Fairbanks, AK
GENERAL SCIENCE TRACK
Visualization of Electronic Motion in Inorganic Molecules. Specific
examples of applications of new modules to the visualization of
Gibbsite and other soil minerals will be presented.
2 - 2:45 p.m.
Monday
George R. Famini
US AERDEC, Aberdeen Proving Ground, MD,
Susanna Wei, St. Joseph's University
Visualizing Properties of Atomic and Molecular Systems in AVS. 3 -
3:45 p.m. Tuesday
Modules developed to read data from some of the existing electronic
structure programs; DMol, GAUSSIAN and MOPAC.
Ken Flurchick
MCNC
Research Triangle Park, NC
Visualizing Time Dependent Data from Molecular Dynamics
Simulations using AVS.
9 - 9:45 a.m. Wednesday
The module suite addresses factors in the visualization of molecular
dynamics such as data importing, filtering to extract sub-domains,
picking individual atoms for highlighting, selecting atoms for
monitoring dynamic behaviors such as trajectory, and generating
animations for studying the dynamics of the whole system.
Upul Obeysekare
Naval Research Laboratory
Washington, DC
A Visualization Environment for Atomic Arrangement and Materials
Design.
10 - 10:45 a.m. Wednesday
S. A. Khaddai Blackett, Imperial College
The work reported in this paper has been driven by the
motivation of producing high quality materials for high
performance electronic and optical devices. Many types of
scientific visualizations can be best carried out in the form of an
animated image sequence which conveys temporal as well as
spatial or other information. This work is concerned with the use of
AVS for the visualization and animation of large-scale simulations.
We are particularly concerned with the visualization of the surface
morphologies generated from simulation of a material growth
technique known as molecular-beam epitaxy (MBE). The
graphics/animation environment together with our AVS modules are
described and results are presented. Video will also be shown.
Quasicrystal Modeling Using AVS.
11 - 11:45 a.m. Wednesday
Takashi Soma and Yasunari Watanabe
The Institute of Physical and Chemical Research Japan
A 3D quasiperodic tiling as a model of quasicrystals is generated by the projection
of a 10D lattice to 3D space. The 10 by 10 projection matrix is shown in which the
3D column vectors for the first three rows are ten vectors from center to vertices
of a dodecahedron. The 3D tiling is examined by displaying it by a stick model
using AVS geometry viewer.
Visualization of Thermodynamic Properties of Gases.
1 - 1:45 p.m. Wednesday
The results of a simulation of transport properties of a moderately
dense gas.
Mark Reed, MCNC.- North Carolina Supercomputing Center
MEDICAL TRACK
A Graphical Simulator for Design and Verification of Computer
Controlled Treatment Delivery.
11 - 11:45 a.m. Monday
Marc L. Kessler, University of Michigan
To facilitate safe and efficient radiation therapy treatment delivery,
we have developed an AVS5-based graphical simulator for use in
the design and verification of computer- controlled treatments. The
graphical simulator is composed of several components: a three-
dimensional, kinematic model of the treatment gantry, table, and
multileaf collimator, a set of widgets that mimic the machine input
and readout devices, a collision detection algorithm, and an icon-
based treatment script manager. The simulator operates in two
modes; a stand alone mode for treatment delivery design, and an
integrated mode for assisting the implementation and verification of
treatments.
Brachytherapy Visualization using AVS
1 - 1:45 p.m. Monday
K. J. Weeks, Duke University Medical Center
Brachytherapy is the insertion of radioactive sources into a cancer
patient's tumour to achieve localized control of cancer. AVS
supported modules supplemented by a few custom written modules
are used to give the physician new insights into the results of such
therapy. Surface shaded organ and tumour volumes combined with
dose (energy/mass) calculations are displayed quickly for physician
interpretation and decision. AVS is shown capable of providing an
efficient solution to the problem of 3D visualization and is playing a
useful role in this therapy at our institution.
AVS in Medical Treatment Planning.
2 - 2:45 p.m. Monday
E. Loren Buhle, Jr., Univ. of Pennsylvania
This talk will discuss the use of AVS in medical treatment planning
and treatment verification. While concentrating primarily in the
areas of radiation therapy treatment and verification of cancer, the
use of AVS in areas such as plastic surgery and orthopedics will
also be discussed. This talk will focus on the design and
implementation of user-written AVS modules in a medical
environment and makes no assumptions of the audience regarding
medical knowledge.
Use of AVS in a Prototype Ultra-Fast Magnetic Resonance Imaging
System.
3 - 3:45 p.m. Monday
Roddy McColl, UT Southwestern
We are now clinically testing an ultra-fast magnetic
resonance imaging system which incorporates the use of
AVS for data acquisition, pre- and post-processing and
image generation and display. The complete system includes a
commercial MRI scanner, a PC equipped with in-house developed
ADC hardware, and a Kubota Titan workstation running AVS
software. Communications between PC and Titan are via NFS file
transfer, both data and sentinels. The AVS sub-system can be used
for data acquisition and image reconstruction, and subsequent
review and editing of the MR data. Applications include functional
MRI measurements and multislice snapshot cardiac imaging.
Multimodality Image Fusion and Registration Techniques Using the
MEDIAN (TM) Library and AVS.
11 - 11:45 a.m. Wednesday
Using features extracted from the image data, complementary
information from different 3D image datasets is registered and
fused to create a more complete representation of the patient.
Philippe Boulle
Focus Graphics
Foster City, CA
Measurement of Distal Radius Fracture Instability from Computed
Tomography using AVS.
1 - 1:45 p.m. Wednesday
The reduction in interfragmentary motion of distal radius fractures
following external fixation was measured and animated using AVS.
John Hipp
Beth Israel Hospital, Harvard Medical School Boston, MA
CFD TRACK
Visualizing Multidimensional Human Exposure Data Inside a
Residence House Using AVS.
11 - 11:45 a.m. Tuesday
YanChing Q. Zhang
ManTech Environmental Technology, Inc.
Research Triangle Park, NC
In-door air pollution is an emerging field in air quality
study. The visualization tool for this subject is not
available. The objective of our research is to visualize and animate
the multidimensional data inside a residence house from a
mathematical model. Several possible methods for the research are
discussed. The initial efforts in the research have been put on the
development of a user friendly interface to bridge the AVS
visualization capability with time-dependent concentration dataset.
The distribution of the time- dependent concentration in different
rooms of the house are visualized and animated. The visual effects
of the multidimensional data structure are presented.
Flow Visualization for Lagrangian Particle Methods.
1 - 1:45 p.m. Tuesday
Visualizing a numerical simulation of a rising, chaotic bubble where
each particle represents a region with a specified vorticity
distribution. Micheal W. Glass
Sandia National Laboratories
Albuquerque, NM
Experiences with CM-AVS to Visualize and Compute Simulation Data
on the CM-5.
2 - 2:45 p.m. Tuesday
A distributed network of CM-AVS and AVS modules is used to
concurrently visualize the time varying flow field being computed on
the CM-5. Arsi Vaziri
NAS Applied Research Branch, NASA Ames Research Center Moffett
Field, CA
IMAGING: REMOTE SENSING TRACK
AVS for Remote Sensing Applications.
4 - 4:45 p.m. Monday
AJ Rye, CJ Willis, CJ Oddy
GEC-Marconi Research Centre
Chelmsford, UK
The GEC-Marconi Research Centre have been using AVS to
build integrated systems for the analysis and visualisation g
images. This paper will review the
approach taken to construct large systems (50-130
modules) using dynamic network structures, CLI based menu
systems, automated annotation of images and graphics, and the
role of user data structures. Examples from several systems will be
presented, including : - Validation and Visualisation system;
designed for image quality analysis and the visualisation of
geocoded image products. This system has an integrated set of
tools for measuring the radiometric and spatial quality of large
images (8000x8000 pixels) and visualising image composites
consisting of radar, optical, map, terrain and auxiliary data.- IPAP; a
system for sea ice monitoring with ERS-1 radar images. This
system includes image analysis tools for the automatic
interpretation of images including feature detection, segmentation,
classification, and motion analysis.- MPWS; a system for the
synthesis and display of polarimetric radar data. The presentation
will include notes on the MRC solutions to common problems and
comments on the strengths and weaknesses of AVS. The emphasis
will be on the application of AVS tools to remote sensing imaging
applications.
Processing and Visualization of Infrared Images.
9 - 9:45 a.m. Tuesday
Dr Yeng Bun, Quest Integrated, Inc.
Quest Integrated is developing a real-time infared (IR)
imaging system capable of measuring crack length, surface
temperature, and the strain displacement of materials such as
intermetallics, continuous fiber-reinforced ceramics, and metal
matrix composites. A major contribution to the development of this
system is the use of AVS to post process raw digital images
captured by the IR camera. By performing both image processing
and visualization with AVS, we were able to effectively manipulate
and present the resultant images for specific engineering analysis.
The AVS networks constructed for this task contain both the
supported as well as in-house modules.
SIMMAP - A New AVS Module for Generating Temporal Similarity
Maps from Dynamic Images.
10 - 10:45 a.m. Tuesday
A new similarity mapping technique has been developed for dynamic
image analysis and we have built a new SIMMAP module in AVS for
calculating similarity maps.
Jadwiga Rogowska
Massachusetts General Hospital
Boston, MA
ENGINEERING ANALYSIS
Sound Radiation Analysis of Loudspeaker Systems Using Nearfield
Acoustic Holography (NAH) and AVS.
3 - 3:45 p.m. Tuesday
Thomas H. Burns, Pennsylvania State University
Since the introduction of NAH in 1985, the computational
power found in today's workstations and graphic systems
has provided a powerful method of studying the radiated
fields of loudspeaker systems. The NAH technique is based on the
Helmholtz Integral Equation and utilizes a two-dimensional spatial
FFT to predict the acoustic free-field variables at any point in three-
dimensional space from information measured on a two-
dimensional dimensional plane; i.e., the hologram plane. The
complicated algorithms needed for this technique have been
programmed into module form and combined into an AVS network.
This application is useful to study sound propagation in rooms,
diffraction effects from cabinet discontinuities, and time-domain
energy transfer between multiple drivers.
An AVS-based Environment for Visualizing Time-dependent Finite
Element Data.
9 - 9:45 a.m. Wednesday
An environment that is based on a custom application of the Data
Viewer and a robust AVS input module that reads our neutral FE data
files. Larry Schoof
Sandia National Labs
Albuquerque, NM
Trappist - a system for Combined and Collaborative Nondestructive
Testing Evaluation.
10 - 10:45 a.m. Wednesday
The system aims to integrate different NDT methods in a standard
environment and to facilitate the collaboration of experts around
Europe. Andreas Schumm
Federal Institute for Materials Research and Testing Berlin, Germany
AEROSPACE/ASTROPHYSICS
Visualizing Shock Waves in Hypersonic Flow.
11 - 11:45 a.m. Monday
Development of a new algorithm to visualize shock waves in
hypersonic flow which we have implemented in AVS.
Shahid I. Choudhry
DLR German Aerospace Research
Germany
AVS As a Design Simulation Controller for an Airborne Observatory.
1 - 1:45 p.m. Monday
D. Glenn Deardorff, Sterling Software, NASA Ames Research Center
******I'm working on an AVS application right now that I think
might be of interest |enough to talk about at the conference (its about using AVS
to manage and |integrate the different "off-the-shelf" simulation codes used for
designing the |the next generation of airborne infrared telescopes), but at this
point I'm still not quite sure if the AVS approach will be considered the most viable
|approach by the design engineers (comparered to how they doing it presently in
a "more traditional" manner). *******
OIL AND GAS TRACK
AVS Techniques for Well Log Analysis of the Eugene Island Field.
THIS TALK CANCELLED AS OF 4/20/94
4 - 4:45 p.m. Monday
This study demonstrates how various subsurface rock geometries
are defined using well log analysis techniques.
B.S. Eiche
Cornell University
Ithaca, NY
Coupling AVS with Mosart as a Large-Scale X-Window Server. 9 -
9:45 a.m. Tuesday
Mosart provides the ability to drive multiple display devices,
maintaining coherence of the displays and interception of window
events such that very large X-windows can be shown on a mosaic of
multiple display devices. Jan Moorman
Schlumberger Laboratory for Computer Science Austin, TX
To Be Announced.
10 - 10:45 a.m. Tuesday
Shell Development Co.
Houston, TX