Thursday Oct 06, 2011

JavaOne 2011 : Parallel Data for Java Slides

Despite having a bad cold I made it through my JavaOne presentation on the parallel library extensions that are being developed for Java 8. As I said following one coughing bout "DayQuil--unofficial sponsor of this session". Hopefully it was intelligible and coherent for those who had to listen to my coughing and sniffling throughout.

Here's the slides for the presentation 25066 : Bulk Hauling -- Parallel Data for Java. Session audio may be available on the Java Channel in a few days.

Wednesday Oct 05, 2011

JavaOne 2011 : Collections BOF Slides

The annual JavaOne Collections Birds-of-a-Feather gathering was on Monday night. It was extremely well attended and I hope was useful to everyone who participated. Here are the slides for the presentation part of the session. The audio should be up on the JavaOne site in a few days.

2011 Collections Gathering Slides

My other session "Bulk Hauling : Parallel Data for Java" is on Thursday @ 11 in Hilton Yosemite. It will cover the lambda based parallel extensions to Collections we are building for Java 8. See you there!

Update:I've corrected the broken link to my slides. Slides are also up for the Parallel Data talk.

Thursday Sep 09, 2010

Closed Road No Professional Driver

When they eventually make a TV commercial about Shelley I hope that they include the disclaimer "Closed Road No Professional Driver". It sure is odd to see a car driving with nobody in it. Shelley's simplest driving demonstration already exceeds the James Bond autonomous car gimmick from two movies back.

We've now had three full days of testing at Pike's Peak. The testing is going very well and Shelley is performing flawlessly. Most importantly for me the Java systems have been performing flawlessly. If there's one thing I've learned on this trip is that tuning server VM performance is child's play compared to configuring DGPS repeater systems. It's really fun working on a team project like this with automotive , software, mechanical and control systems engineers and uber-mechanics. (OK to most people this probably reminds them of the "Deep Space Homer" episode--"A mathematician, a different kind of mathematician and a statistician"). The discussions around dinner have been really interesting and not all about autonomous cars.

It's rather exhausting working at 2900m (9500ft) and getting up at 0400 to be on the mountain by 0500 so that we can test the car with the road closed to tourists. Hot coffee is your friend. By mid afternoon everyone is starting to look a little dazed and slow. I've only made one trip to the summit so far (didn't get to try the donuts) and I felt a bit winded just standing there.

Photo of the trunk compartment of Shelley with all of the computers and equipment.

The Java system is the black box behind the two red switches. The red switches do not fire up the BBQ even though that's what they look like.

Team members Paul and Mick examining test data after a successful run.

Saturday Sep 04, 2010

Shelley @ Pikes Peak

Next week Shelley, the Java powered autonomous vehicle being developed by Audi and Stanford, will be visiting Pikes Peak for her first "on-the-mountain" trials. This is not the competitive event where Shelley will be trying to race up the entire mountain as fast as possible. There is still almost a year until the official hill climb event. This set of trials will be to evaluate how Shelley is driving so far and how her systems have come together. Most of the driving will be at low speeds, less than 10 km/h. Some higher speed testing is planned for smaller portions of the 11 mile track.

I will post a couple of updates throughout the week with photos of the team and Shelley in action. Right after we return from Pikes Peak, Marcial Hernandez and I will be doing a presentation S312929 : Java in the Real World: Experiences with Real-Time Java for Device Control at JavaOne 2010. We should have some really great stories and exciting video to share.

My recent contributions to the Shelley project have been to create visualizations for the Java safety system. I won't share the actual UI just yet as it's still in progress, but here's a small tease:

Screenshot of a Java Swing application showing two track views.

This shows two views of the same track. The left shows the entire track, in this case a short track used in testing at Santa Clara County Fairgrounds, and the right track is a magnified view showing only two curves of the same track. The black dot on each view is the position of Shelley on the track. The maps used by Shelley are described as a series of curves. The map is a representation of the path Shelley should travel to traverse the road. Each curve consists of four parts, a straight segment, an entry segment, the curve proper and an exit segment. In this visualization the segments are red, green, blue and cyan respectively. On the magnified view there is a line drawn between Shelley's location and the track.

I will explain more about what's shown in the visualizations in future postings.

Wednesday Aug 04, 2010

Shelley @ Salt Flats

Image of 'Shelley', an autonomous Audi TTS at the edge of the Bonneville Salt Flats with a rainbow over the salt flats in the background

Photo credit: Marcial Hernandez

Shelley returned to the Bonneville Salt Flats last weekend for more testing. The Stanford and VW teams were focused on shaking out bugs in the driving algorithms and their map building code. This trip was also the first major trial where the Java Realtime system provided all of the GPS interfacing and data logging. The hoary old C code it replaces has been permanently and officially retired! Two systems down, with lots more to come!

I particularly like Shelley's new look with the Java logo out in front!

To hear more about the Shelley project consider attending the session S312929 : Java in the Real World: Experiences with Real-Time Java for Device Control that Marcial Hernandez of Volkswagen and I will be presenting at JavaOne 2010. We will have recent video of Shelley running on Pike's Peak and lots of details of our experiences developing Shelley and other embedded Java applications.




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