[IGSTK-Users] State Machine Validation Failure

[Kevin Gary]

Charles,

Sorry for the issue, and thank you for reporting it.

We have had this issue occur for a few different reasons. While it may be 
delayed via some GC tuning parameters, it could be an issue with how you define 
your XML (possible infinite loop). Is it possible for you to zip your SCXML, 
sendEvent, and config files up and send to me? I can investigate this evening.

Also, we have had an issue where the JVM does not terminate completely on linux, 
and also with the SWT library version. Can you check that there is not an 
already running Java process from the simulator that did not terminate before 
you run again? You can do a "ps -ef | grep java" to check.

KG


charles.garraud at irisa.fr wrote:
> Hi,
> 
> I encounter some memory failure problems when trying to use the 
> run-simulator app.
> 
> The app runs on a 2GB memory laptop.
> The OS is Ubuntu 9.04.
> The problem occurs when running some of the igstk examples (it seems to 
> be linked to the number of events defined in the events files). For 
> example,
>    *igstkDummyTracker.xml with sendEvent files 
> igstkDummyTracker_edgecoverage_test_basispath1.xml and 
> igstkDummyTracker_nodecoverage_test1.xml
>    *igstkLandmark3DRegistration.xml with sendEvent files 
> igstkLandmark3DRegistration_edgecoverage_test_basispath1.xml and 
> igstkLandmark3DRegistration_nodecoverage_test1.xml
> 
> The problem is related to heap memory management (as described here: 
> http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html). 
> The recursive insertion of element
> in igstkvtMergeList.java seems to cause the failure.
> 
> Here is the error returned:
> 
> java.lang.OutOfMemoryError: GC overhead limit exceeded
>     [java]     at 
> org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:194)
>     [java]     at org.apache.tools.ant.taskdefs.Java.run(Java.java:764)
>     [java]     at 
> org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:218)
>     [java]     at 
> org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:132)
>     [java]     at org.apache.tools.ant.taskdefs.Java.execute(Java.java:105)
>     [java]     at 
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
>     [java]     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown 
> Source)
>     [java]     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
> 
>     [java]     at java.lang.reflect.Method.invoke(Method.java:616)
>     [java]     at 
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
>     [java]     at org.apache.tools.ant.Task.perform(Task.java:348)
>     [java]     at org.apache.tools.ant.Target.execute(Target.java:357)
>     [java]     at org.apache.tools.ant.Target.performTasks(Target.java:385)
>     [java]     at 
> org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
>     [java]     at 
> org.apache.tools.ant.Project.executeTarget(Project.java:1306)
>     [java]     at 
> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
> 
>     [java]     at 
> org.apache.tools.ant.Project.executeTargets(Project.java:1189)
>     [java]     at org.apache.tools.ant.Main.runBuild(Main.java:758)
>     [java]     at org.apache.tools.ant.Main.startAnt(Main.java:217)
>     [java]     at 
> org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
>     [java]     at 
> org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
>     [java] Caused by: java.lang.OutOfMemoryError: GC overhead limit 
> exceeded
>     [java]     at java.util.Arrays.copyOf(Arrays.java:2746)
>     [java]     at java.util.ArrayList.ensureCapacity(ArrayList.java:187)
>     [java]     at java.util.ArrayList.addAll(ArrayList.java:499)
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:112) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java] --- Nested Exception ---
>     [java] java.lang.OutOfMemoryError: GC overhead limit exceeded
>     [java]     at java.util.Arrays.copyOf(Arrays.java:2746)
>     [java]     at java.util.ArrayList.ensureCapacity(ArrayList.java:187)
>     [java]     at java.util.ArrayList.addAll(ArrayList.java:499)
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:112) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java] Java Result: -1
> 
> 
> I tried to increase the JVM memory capacity (export ANT_OPTS="-Xms1024m 
> -Xmx1024m"). It didn't work.
> 
> I tried to switch off gc overhead limit (-XX:-UseGCOverheadLimit), but 
> (as I expected) it didn't work but just change the error to a heap space 
> error:
> 
> [java] java.lang.OutOfMemoryError: Java heap space
>     [java]     at 
> org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:194)
>     [java]     at org.apache.tools.ant.taskdefs.Java.run(Java.java:764)
>     [java]     at 
> org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:218)
>     [java]     at 
> org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:132)
>     [java]     at org.apache.tools.ant.taskdefs.Java.execute(Java.java:105)
>     [java]     at 
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
>     [java]     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown 
> Source)
>     [java]     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
> 
>     [java]     at java.lang.reflect.Method.invoke(Method.java:616)
>     [java]     at 
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
>     [java]     at org.apache.tools.ant.Task.perform(Task.java:348)
>     [java]     at org.apache.tools.ant.Target.execute(Target.java:357)
>     [java]     at org.apache.tools.ant.Target.performTasks(Target.java:385)
>     [java]     at 
> org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
>     [java]     at 
> org.apache.tools.ant.Project.executeTarget(Project.java:1306)
>     [java]     at 
> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
> 
>     [java]     at 
> org.apache.tools.ant.Project.executeTargets(Project.java:1189)
>     [java]     at org.apache.tools.ant.Main.runBuild(Main.java:758)
>     [java]     at org.apache.tools.ant.Main.startAnt(Main.java:217)
>     [java]     at 
> org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
>     [java]     at 
> org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
>     [java] Caused by: java.lang.OutOfMemoryError: Java heap space
>     [java]     at java.util.Arrays.copyOf(Arrays.java:2746)
>     [java]     at java.util.ArrayList.ensureCapacity(ArrayList.java:187)
>     [java]     at java.util.ArrayList.add(ArrayList.java:378)
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:122) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java] --- Nested Exception ---
>     [java] java.lang.OutOfMemoryError: Java heap space
>     [java]     at java.util.Arrays.copyOf(Arrays.java:2746)
>     [java]     at java.util.ArrayList.ensureCapacity(ArrayList.java:187)
>     [java]     at java.util.ArrayList.add(ArrayList.java:378)
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:122) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java]     at 
> org.igstk.validation.simulator.rules.IgstkvtMergeList.insert(IgstkvtMergeList.java:131) 
> 
>     [java] Java Result: -1
> 
> 
> If anyone can help, cause I'm stuck here...
> 
> Thanks a lot,
> 
> Best regards,
> 
> Charles
> 
> 
> 
> 
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-- 
Kevin A. Gary, Ph.D.
Assistant Professor
Department of Engineering
College of Technology and Innovation
Arizona State University at the Polytechnic Campus
(480)727-1373
http://dcs.asu.edu/faculty/KevinGary
kgary at asu.edu