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Justin Uberti
Works at Google
Attended University of Virginia
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Justin Uberti

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Reshared because awesome.
 
Kids, don't try this at home: it's almost certainly not a good idea. But for those of you who are interested in physics, note several important points:

(1) The rocket fires under water: that works because it's a true rocket, carrying both fuel and oxidizer on board and not using air at all. The shape of the nozzle is also important, since water has an amazing ability to absorb heat and thus quench combustion; a caul around the nozzle keeps the water from getting at the ignition point from the sides.

(2) The primary explosion creates a roughly circular set of cracks. Those lead to "big" cracks opening up in the ice, as existing seams and weaknesses get expanded. 

(3) Note that the circular cracks become hexagonal (matching the big cracks) as you move outwards. What's happening is that the inner cracks happen first, and then those start the big cracks, which actually spread faster than the round ones, basically moving at the speed of sound in ice. By the time the last round cracks are forming, they're forming in ice that already has hexagonal cracks in it.

(4) Water is an incompressible fluid, which means that the shock waves are going to hit things under water very, very hard. This is likely to be lethal to anything underwater and nearby, and is how dynamite fishing works. The reasons why that's a terrible idea (and is therefore illegal nearly everywhere) are hopefully obvious.

(5) That said, watching things explode underwater is pretty cool.

h/t +Kee Hinckley 
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Slides from the Introduction to ICE presentation that +Emil Ivov, Brandon Williams, Pal Martinsen, and I gave today.

https://docs.google.com/presentation/d/17mVv6_eKqLkKkG-pwx_p-NOrYl2CK02OAtAtcHKJgHU/edit
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IETF_ICE_intro (Dallas 92)Introductory Session to IETF ICE/TURN/STUN set of RFCs IETF 92
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Part of the SIP problem is that it adopted SDP and SDP's penchant for carrying media addresses around as actual IP addresses and ports.  We knew (1995 time frame) - before SIP was invented - that doing that was not a good idea.  Protocols that didn't do that (such as HTTP/HTTPS) have a much easier time dealing with NAT.
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USB-C. 100W power, 10 Gbps bandwidth, 4K resolution, and USB. Finally, one connector to rule them all.

http://9to5mac.com/2015/03/10/usb-c-cable-gallery-compare-to-lightning-and-micro-usb-specs-and-apples-future/
We've been poring over Apple's change to the 8.4mm by 2.6mm USB Type C standard since we got tipped the design of the new MacBook late last year. It is a big change for Apple and puts the future of...
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20Gbps actually 😉
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Lots of nice #webrtc improvements coming in Chrome 42.
 
Chrome 42 was just cut and is going to beta.

Performance Performance Performance. And lots of bug fixes. 

 https://groups.google.com/forum/#!topic/discuss-webrtc/PwuzgUypYos
M42. Summary. Chrome 42 is a performance-focused build. The WebRTC team, along with many other Chrome component teams, have made performance improvements a priority for this release. For example, https://codereview.chromium.org/759753005 improved GPU performance significantly on Windows, ...
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Cool #AutoAwesome.
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Come join Google and Microsoft WebRTCers at the Seattle WebRTC Meetup on April 14!

http://www.meetup.com/Seattle-WebRTC-Group/events/220789022/?fromJoin=220789022
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Didn't see Microsoft inside the link. Am I missing something?
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A rundown of the many great open source projects that the Chrome team works on (including WebRTC).
 
Today, I'd like to share with you some remarkable open-source projects the chromium team has been contributing to over the years. This non-exhaustive list is divided into chromium-owned projects and those the team has contributed to.

Owners

ANGLE - Almost Native Graphics Layer Engine
https://code.google.com/p/angleproject

Blink - Web rendering engine forked from WebKit
https://chromium.googlesource.com/chromium/blink

BoringSSL - Crypto and SSL stack derived from OpenSSL
https://boringssl.googlesource.com/boringssl

Chrome DevTools - Set of web authoring and debugging tools
http://frontend-src.chrome-dev.tools

Chrome OS BIOS U-Boot replacement - Coreboot payload for booting the system super fast
https://chromium.googlesource.com/chromiumos/platform/depthcharge

Chrome OS BIOS Verified Boot
https://chromium.googlesource.com/chromiumos/platform/vboot_reference

ChromeDriver - WebDriver for Chrome
https://sites.google.com/a/chromium.org/chromedriver

Chromium Embedded Controller
https://chromium.googlesource.com/chromiumos/platform/ec

Chromoting - Remotely control a distant machine
https://code.google.com/p/chromium/wiki/ChromotingBuildInstructions

cld2 - Compact Language Detector 2
https://code.google.com/p/cld2

DOM Distiller - Reader mode on Chrome
https://github.com/chromium/dom-distiller

GN - Meta-build system that generates NinjaBuild files
https://code.google.com/p/chromium/wiki/gn

google-breakpad - Multi-platform crash reporting system
https://code.google.com/p/google-breakpad

grit-i18n - Google Resource and Internationalization Tool
https://code.google.com/p/grit-i18n

GYP - Generate Your Projects
https://chromium.googlesource.com/external/gyp

hterm - Cross browser xterm compatible terminal emulator
https://github.com/chromium/hterm

Native Client - Sandbox for running compiled C and C++ code in the browser
https://chromium.googlesource.com/native_client/src/native_client

open-vdiff - Open Source VCDIFF delta compression implementation
https://code.google.com/p/open-vcdiff

PDFium - PDF rendering engine
https://pdfium.googlesource.com

Platform2 - Group of system services that make up the Chromium OS platform
https://chromium.googlesource.com/chromiumos/platform2

Sanitiser for OpenType - parse and serialize OpenType files
https://code.google.com/p/ots

Servo - Debug board used for Chromium OS test and development
http://www.chromium.org/chromium-os/servo                                       

Skia - 2D graphic library for drawing text, geometries, and images
https://chromium.googlesource.com/skia

Swarming - Distribute tasks fast and efficiently in a heterogeneous fleet of bots
https://code.google.com/p/swarming

Syzygy - Windows binary transformation/optimization/instrumentation toolchain
https://github.com/google/syzygy

Trace-Viewer - Frontend for chrome://tracing and Android systrace
https://github.com/google/trace-viewer

V8 -  JavaScript engine
https://code.google.com/p/v8

Web Page Replay - Record live Web pages and use them for local performance testing
https://github.com/chromium/web-page-replay

WebM - video/audio compression/decompression/container libraries
http://www.webmproject.org

WebRTC - Web-based real-time communication
http://www.webrtc.org


Contributors

Apache Cordova - build native mobile apps using Web technologies
http://cordova.apache.org
                                                      
BlueZ - Official Linux Bluetooth protocol stack
http://www.bluez.org

Buildbot - Continuous Integration Framework
http://buildbot.net

Clang - C/C++ language family compiler based on LLVM
http://clang.org

Coreboot - fast and flexible Open Source firmware
http://www.coreboot.org

Dart -  Web programming language
https://www.dartlang.org

Das U-Boot source code - the Universal Boot Loader
http://www.denx.de/wiki/U-Boot

FFmpeg - multimedia library
http://ffmpeg.org

Gentoo Linux
http://gentoo.org

ICU - International Components for Unicode
http://site.icu-project.org

LLVM - Compiler infrastructure project
http://llvm.org

LevelDB - key-value storage library
https://github.com/google/leveldb

Linux Kernel
https://kernel.org

Mesa 3D - OpenGL graphics library
http://www.mesa3d.org

modemmanager-next - Broadband modem support daemon
http://www.freedesktop.org/wiki/Software/ModemManager

Ninja - Build system with a focus on speed
http://ninja-build.org

NSS - Mozilla's Networking and Cryptography library
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS

Selenium - Tool for automated testing of webapps across many browsers
http://docs.seleniumhq.org
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Pretty amazing WebRTC demo. Scroll your browser just by moving your hand in the air, courtesy of WebRTC/Web Audio.

http://danielrapp.github.io/doppler/
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WebRTC release notes for Chrome 41.
 
Chrome 41 is going to Beta this week. We worked very hard on performance (CPU and RAM) and stability for this one.

Filling issues on crbug.com with
=> complete details,
=> testing if it exists on canary
=> example repro cases
=> chrome://webrtc-internals and AEC dumps
=> wireshark traces

are the best ways to help us help you make it even faster and better.

Read all about the M41 goodness here: https://groups.google.com/forum/#!topic/discuss-webrtc/aGsdjGtjIQA
M41. Main things to pay attention to: Opus FEC is now enabled by default. Several performance improvements in Chrome; much less RAM used per PeerConnection, and video capturing and rendering is more CPU efficient. Improvements to iOS arm64 builds. Features: ...
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The first of what will surely be a long list of WebRTC announcements from network operators. When I talk to operators, it's pretty clear that WebRTC isn't some future consideration - they are all reworking their infrastructure to support WebRTC, and doing it now.

http://www.theverge.com/2015/1/5/7494745/att-first-us-carrier-support-webrtc
During its annual Developer Summit held the day before CES officially begins, AT&T announced it will be the first carrier in the US to support Web Real-Time Communication, known as WebRTC. The...
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For carriers it's more about building gateway that will connect WebRTC-clients to their IMS infrastructure.
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Afternoon walk.
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Tech Lead, Google Real-time Communications
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  • Google
    Tech Lead, 2006 - present
  • AOL
    Chief Architect, 1997 - 2006
  • IFusion Com
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juberti
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Brief work history: Tech Lead for WebRTC, Google+ Hangouts, Gmail Call Phone, Google Video Chat, AOL Instant Messenger
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  • University of Virginia
    Mathematics, 1992 - 1995
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