The JavaScript debugger provides you with a set of tools that aid in the process of inspecting and editing JavaScript code. You can use the debugger to identify errors, or step through execution and explore the state of your application at any given moment.  This demo explores some of the debugger features by examining a project that uses a fisheye widget.

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CSS Sprites have been a hot topic for a long time now. The fact is that each image on a web page is a separate server request and you can dramatically increase the performance of a page by combining images and reducing that number of requests. In this screencast I’m going to show you how to do exactly that, by taking what would be 8 different images and combining them into one. As an added bonus, we then expand the idea with jQuery and build ourselves a little accordion widget.

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In this episode we will take a look at how to use Anonymous objects. We will also learn how we can use Anonymous objects as property bags and turn them into a Dictionary for usage.

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Just as people are beginning to understand the difference between web ops and IT, we are entering a period where clouds promise “Ops-Free” computing. Soltero talks about the emergence of web operations as a discipline, and how cloud computing simply changes, instead of eliminating, the importance of web operations.
Javier Soltero (Hyperic, Inc.)

Created by VelocityConf

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Steve Souders of Google and Jesse Robbins of the O'Reilly Radar welcome participants to the first-ever O'Reilly Velocity conference.

Created by VelocityConf

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Get an early look at KITE – the Keynote Internet Testing Environment. KITE tests and analyzes the performance of web applications from your desktop and locations around the world. KITE allows advanced scripting, detailed network performance and DOM analysis, and the ability to gather data from hundreds of geographic locations worldwide. In this preview the Keynote team demo KITE on some of the world’s most popular web sites and announce its Early Adopter Program for this new free product.
Vik Chaudhary and Abelardo Gonzalez (Keynote Systems)

Created by VelocityConf

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Most tools for measuring web performance come in two flavors: Developer-installed tools (Firebug, Fiddler, etc.) that allow individuals to closely trace single sessions or third-party performance monitoring systems (Gomez, Keynote, etc.) that will hit your site occasionally and report back component-level metrics (for a fee). Neither of these tools give you real-world information on what’s actually happening with your clients—how long are pages really taking to load, what’s the real cost of client-side execution, and what’s the impact of your loading or dependency chain. This talk will provide more information on the problem and the current solutions, and why we rolled our own, provide a technical overview of Jiffy, and show some real-world lessons we’ve had using it in our own production environment.
Scott Ruthfield (WhitePages.com)

Created by VelocityConf

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Summary
In this interview filmed during QCon London 2008, Joe Armstrong, designer of Erlang, speaks on various aspects of the Erlang language, presenting its roots, how it compares with other languages and why it has become popular these days due to its native ability to scale on multi core systems.

Bio
Joe Armstrong is the principle inventor of Erlang and coined the term "Concurrency Oriented Programming". At Ericsson he developed Erlang and was chief architect of the Erlang/OTP system. In 1998 he formed Bluetail, which developed all its products in Erlang. In 2003 he obtain his PhD from the Royal Institute of Technology, Stockholm. He is author of the book "Software for a concurrent world".

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How fast Web pages load and how fast they change dynamically depends on both the Web page and the browser it's running in. Browser makers put significant effort into making their browsers faster, but there are also things that Web page authors can do to make their pages more responsive.

I plan to talk about HTML, CSS, and the DOM in Mozilla, from the DOM tree and CSS style sheets through to displaying pixels on the screen. In particular, what do Mozilla-based browsers spend the time doing when they're displaying a Web page? Which parts of this work are redone when the page is changed by script? And what implications does this have for how authors can make their pages faster, and for how authors can test the performance of their pages?

Speaker: David Baron
David is a software engineer at Mozilla Corporation, where he works on Mozilla's implementations of Cascading Style Sheets (CSS) and layout algorithms (computing the positions of objects), fixing memory leaks, and other things. He has been working on Mozilla since 1998, and is a member of the W3C CSS working group.

Google Tech Talks
November 12, 2008

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Summary
In this presentation from the JVM Languages Summit 2008, Bernd Mathiske discusses the Maxine open source research VM, Java compatibility, swapping out major VM components, Maxine research areas, meta-circular VM design, assembler usage, how Objects are handled, the common Pointer/Object interface, code examples, optimizing compiler features, snippets, bytecode generation, JNI and JIT.

Bio
Bernd Mathiske is a Senior Staff Engineer and the principal investigator of the Maxine project, creating a meta-circular Virtual Machine for the Java platform written in Java 5. Recently, Mathiske was instrumental in transferring the MVM multi-tasking technology from Sun Labs' Barcelona project into the Monty JVM, and in developing J2ME platform enhancements for multi-tasking in mobile phones.

About the conference
The 2008 JVM Language Summit is an open technical collaboration among language designers, compiler writers, tool builders, runtime engineers, and VM architects. The talks inform the audience, in detail, about the state of the art of language design and implementation on the JVM, and the present and future capabilities of the JVM itself.

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How do you use jQuery with Rails? In this episode I redo episode #43 using jQuery instead of Prototype/RJS.

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Who is RockYou and what they do?

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Advertising and Monetization by RockYou in OpenSocial Ecosystem

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What are the Viral Channels BuddyPoke Use on Social Sites?

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Compatibility Issues across Containers and How to Find Help

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With the advent of the Internet, billions of images are now freely available online and constitute a dense sampling of the visual world. Using a variety of non?parametric methods, we explore this world with the aid of a large dataset of 79,302,017 images collected from the Web. Motivated by psychophysical results showing the remarkable tolerance of the human visual system to degradations in image resolution, the images in the dataset are stored as 32x32 color images. Each image is loosely labeled with one of the 75,062 non?abstract nouns in English, as listed in the Wordnet lexical database. Hence the image database gives a comprehensive coverage of all object categories and scenes. The semantic information from Wordnet can be used in conjunction with nearest?neighbor methods to perform object classification over a range of semantic levels minimizing the effects of labeling noise. For certain classes that are particularly prevalent in the dataset, such as people, we are able to demonstrate a recognition performance comparable to class?specific Viola?Jones style detectors.

In the second part of the talk, we present efficient image search and scene matching techniques that are not only fast, but also require very little memory, enabling their use on standard hardware or even on handheld devices. Our approach uses the Semantic Hashing idea of Salakhutdinov and Hinton, based on Restricted Boltzmann Machines to convert the Gist descriptor (a real valued vector that describes orientation energies at different scales and orientations within an image) to a compact binary code, with a few hundred bits per image. Using our scheme, it is possible to perform real?time searches on our Internet image database using a single large PC and obtain recognition results comparable to the full descriptor. Using our codes on high quality labeled images from the LabelMe database gives surprisingly powerful recognition results using simple nearest neighbor techniques.

This talk will be taped

Speaker: Rob Fergus
Rob Fergus is an Assistant Professor of Computer Science at the Courant Institute of Mathematical Sciences, New York University. Originally from the UK, he has a undergraduate degree in Electrical Engineering from the University of Cambridge. He then did a Masters in Electrical Engineering with Prof. Pietro Perona at Caltech, before completing a PhD with Prof. Andrew Zisserman at the University of Oxford. Before coming to NYU, he spent two years as a post-doc in the Computer Science and Artificial Intelligence Lab (CSAIL) at MIT, working with Prof. William Freeman.

Google Tech Talks
May, 8 2008

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The team from MetaBroadcast Ltd describe their work on URIPlay (uriplay.org).

Radio and TV were designed to be simple, to require minimum
involvement. Our grandparents sometimes chose to change channel, but this was strictly optional. Today's technology has brought us more choice, freeing our viewing and listening from set schedules.

However, alongside this choice, we users must deal with complexity. Increasingly, we are asked to decide not only what we would like to watch or listen to, but also via what route we would like to receive it. PVRs, 'on demand' TV platforms, streaming websites and downloads each add to our technology choices.

Broadcasters have traditionally provided a simpler experience for audiences, but their recent technology and commercial choices are adding to the underlying complexity. Together with rights owners, they attempt to control the consumption of content through DRM, geoblocking, etc. Thus, content distribution via broadcasters' websites, hubs like YouTube, search engines and P2P downloads requires serious efforts on the side of the user--not our grandparents' experience.

URIplay aims to restore simplicity to the experience without reducing choice. We compile and publish metadata files listing the URIs at which content can be played. Each URI is described in terms of media data format, revenue model, and restrictions applied. Developers will be able to use this information and our open API to refer precisely to the content and select appropriate URIs for their users. Think of it as DNS for media.

Since the project started in late 2007, we have defined an XML format, built a website and an API, and imported data from the BBC--our first sponsor. During our talk we will describe the system design and related challenges, as well as our aspirations in restoring simplicity to media consumption.

Speaker: Chris Jackson
Speaker: Lee Denison
Speaker: George Wright

Google Tech Talks
April, 3 2008

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A year later, we look back at the OpenSocial developer events held in Nov 2007 to evangelize OpenSocial development for orkut, followed by a 4 day hackathon with select developers in Bangalore to energize high quality application developers.

More info about OpenSocial:

• http://code.google.com/apis/opensocial/
• http://www.opensocial.org/
• http://wiki.opensocial.org/

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Kevin Marks, Developer Advocate at Google, talks about OpenSocial on the first anniversary of OpenSocial's launch. Kevin discusses the history of social applications on the web, the evolution of social networks and where OpenSocial plays a part.

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GTAC 2008: Practicing Testability in the Real World

The Third Annual Google Test Automation Conference (GTAC), Seattle, WA, Oct. 23rd and 24th.

Speaker: Vishal Chowdhary

Google Tech Talks
October 24, 2008

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Clean Code Talks - Unit Testing

Speaker: Misko Hevery

Google Tech Talks
October, 30 2008

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Replay debugging allows developers to debug recordings of programs running in virtual machines. This simple (and old) idea addresses some of the greatest challenges of software development, because a recording containing the manifestation of a bug represents an unambiguous encapsulation of that bug. Whether the bug is non-deterministic, difficult to reproduce, or just difficult to describe, the program containing the bug will behave identically each time it is replayed, allowing the developer to more easily debug it. In addition, replay debugging is non-invasive, because while debugging a replayed program behaves as it did during recording. The developer need not worry about how debugging may change the scheduling of threads, the order in which locks are acquired, or connections with external processes/machines timing out. Finally, an abstraction of reverse execution can easily be built on top of replay debugging, allowing developers to directly move (backward) from the manifestation of a bug to its origin.

VMware Workstation 6.5 includes an experimental form of replay debugging for C/C++ Windows developers using Visual Studio. We hope you will give this feature a try, and we are very interested in feedback concerning the direction it should take in future releases.

This presentation motivates and introduces replay debugging and summarizes our implementation in VMware Workstation 6.5. More information is available at http://www.replaydebugging.com/.

Speaker: E Christopher Lewis
E Lewis has been an engineer in the Advanced Development Group at VMware since 2007 where he explores novel applications of virtualization.
Before joining VMware, E was a professor (University of Pennsylvania), student (Cornell University and the University of Washington), and lay about (growing up in Vermont and North Carolina). To get away from it all, E plays guitar, knits, and teaches empathy to the unsuspecting.

Speaker: Prashant Dhamdhere
Prashant is MTS at VMware, where he is actively working on Replay Debugging technology. Before joining VMware, he worked on various aspects of storage solutions at Veritas that is now part of Symantec. Prashant brings key windows kernel expertise to team. He holds BS in Computer Science from University of Pune, India.

Speaker: Eric Xiaojian Chen
Eric is an engineering manager at VMware. He manages several projects on VM kernel driver development. Before VMware, Eric has worked at Cisco on a high end switch product for eight years. Eric holds a MBA degree from UC Berkeley and a master degree of Computer Science from Fudan University in Shanghai, China.

Google Tech Talks
October 30, 2008

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The C++ language has started the formal approval process with the recent release of its Committee Draft, i.e. Beta.

This talk outlines the process, the new features, some features left out, and the procedures for formal comments.

Speaker: Matt Austern
Matt Austern is a long-time contributor to the C++ standard, as well as a Google engineer.

Speaker: Lawrence Crowl
Lawrence Crowl is a long-time contributor to the C++ standard, as well as a Google engineer.

Google Tech Talks
October 31, 2008

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GTAC 2008: Context-Driven Test Automation - How to Build the System You Really Need

The Third Annual Google Test Automation Conference (GTAC), Seattle, WA, Oct. 23rd and 24th.

Speaker: Pete Schneider

Google Tech Talks
October 24, 2008

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GTAC 2008: Simple Tools to Fight the Bigger Quality Battle: Continuous Integration Using Batch Files and Task Scheduler

The Third Annual Google Test Automation Conference (GTAC), Seattle, WA, Oct. 23rd and 24th.

Speaker: Komal Joshi
Speaker: Patrick Martin

Google Tech Talks
October 24, 2008

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In this episode we will continued our dive into how to use NHibernate.

we’ll discuss some of the types of collections (bag, set, and list), some of the features NHibernate offers for loading, sorting, and pre-filtering collection data, and how cascading and transparent lazy loading works with collections of related objects.

Check out Episode #50 for an Introduction to NHibernate
Check out Episode #51 for an Setting up your mappings
Check out Episode #53 for an Configuring NHibernate
Check out Episode #54 for an CRUD and Basic Transparent Cascading
Check out Episode #57 for an More Basic Usages

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Contemporary society is experiencing a steady stream of new electronic gadgets, software products, and web applications. In this flood of functionality, users have adapted to rely less on manuals (if they are present at all) and shift their learning to trial and error, common paradigms, and experimentation. To accommodate this style of use -- or perhaps driving this behavior - developers have successfully abstracted much of the technological complexity and transformed it into intuitive user interfaces often avoiding the need for reading lengthy manuals and formal training. Is it possible to adopt the same trial-and-error experimentation habit not only for using gadgets, but also for application development? We claim that intuitive aggregation and combination of software gadgets makes this possible.

In this talk, we will show the use of current technology in building a consumer oriented development tool appropriate for individuals not formally trained in programming. We demonstrate that the complexity of existing system and scripting languages i.e.; syntax, semantics, control and data flow, data structures, data types, and programming components can be successfully replaced with analogies intuitively accessible to a much wider consumer population based exclusively on their use and understanding of user interfaces in popular web applications. We present a demo of Geppeto -- a consumer tool for gadget-based application development. Composing gadgets with Geppeto does not require programming experience or reading of convoluted manuals. The presented research is sponsored by Google Inc. and the Croatian Ministry of Science.

Speaker: Sinisa Srbljic
Professor Sinisa Srbljic, Ph.D., is currently a professor at the School of Electrical Engineering and Computing, University of Zagreb, and the project leader of the Geppeto project. His career also spans Silicon Valley where he worked on large-scale distributed systems at AT Labs. He was visiting the University of Toronto, where he worked on the NUMAchine multiprocessor project, and the University of California, Irvine. His research interests include Web computing, gadget composition, and consumer programming. In teaching, he is involved in the theory of computing, programming language translation, service-oriented computing, and network middleware systems.

Speaker: Marin Silic
Marin Silic, B.Sc., is currently a computer science Ph.D. candidate and research assistant at the School of Electrical Engineering and Computing, University of Zagreb. He works on web architectures for composing gadgets as a part of the Geppeto project. As a Google intern in the Spreadsheets group he developed a one-second load application for Google Spreadsheets.

Google Tech Talks
November 10, 2008

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GTAC 2008: JInjector - A Coverage and End-to-End Testing Framework for J2ME and RIM

The Third Annual Google Test Automation Conference (GTAC), Seattle, WA, Oct. 23rd and 24th.

Speaker: Julian Harty
Speaker: Olivier Gaillard
Speaker: Michele Sama

Google Tech Talks
October 24, 2008

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