Jenn Webb

Jenn Webb is a veteran of the newspaper industry turned freelance scribe, editor, and researcher. She is a nerd with a passion for technology and cultural disruption. She currently serves as O'Reilly Radar's managing editor and helps to investigate topics in the Design, IoT+, Data, and Emerging Tech spaces.

HTML 5 Geolocation, SharePoint Tech, Strangeloop, and More

Tech events you don't want to miss.

Each Monday, we round up upcoming event highlights from the programming and technology spaces. Have an event to share? Send us a note.

Intro to Raspberry Pi : Ed Snajder explains what a Raspberry Pi is, how it differs from an Arduino and shows attendees some cool things you can do with a Raspberry Pi. Register for this free webcast.

Date: 10 a.m. PT, June 25 Location: Online webcast

Graphlab Workshop on Large Scale Machine Learning: This workshop is a meeting place for both academia and industry to discuss upcoming challenges of large scale machine learning and solution methods. The main goal for this year’s workshop is to bring together top researchers from academia as well as top data scientists from the industry, with the special focus of large-scale machine learning on sparse graphs. For more information and to register, visit the event page.

Date: 8 a.m. to 7 p.m. PT, July 1 Location: San Francisco, CA

Read more…

Comment

Using Iframes to Address Third-Party Script Issues and Boost Performance

SOASTA chief architect Philip Tellis talks about ways developers and third-party script authors can use iframes.

In the following interview, Philip Tellis, chief architect at SOASTA, talks about how iframes can be used to address performance and security issues with third-party scripts, and how the element can help third-party script owners make use of far-future expires headers. Tellis will address these issues in-depth in his upcoming Velocity session, “Improving 3rd Party Script Performance With IFrames.”

How can iframes be used to boost performance?

PhilipTellis

Philip Tellis

Philip Tellis: Iframes haven’t traditionally been good for performance. Sub-pages loaded in iframes still block the loading of the main page. Too many iframes hurt performance in the same way as too many images or scripts do. The problem is slightly worse with iframes because each page loaded in an iframe may load its own resources, each of which competes with the main page for available bandwidth.

All of this assumes that (1) the iframe is loaded within the page before the onload event fires, and (2) its src attribute points to a resource that needs to be downloaded. If we prevent either of these two conditions from happening, an iframe doesn’t have a performance penalty. We can then take advantage of the fact that the iframe is a complete browser window instance, and you can run pretty much anything you want in there without affecting the main page. This is great if you need to download and cache resources like JavaScript, images and CSS without blocking the page’s onload event or force a cache reload.

The three ways to reduce perceived latency in any system are to cache, parallelise, and predict, and iframes allow us to do all three without impacting the main page.

Read more…

Comment: 1

Intro to Raspberry Pi, Wharton Web Conference, Agile 2013, and More

Tech events you don't want to miss

Each Monday, we round up upcoming event highlights from the programming and technology spaces. Have an event to share? Send us a note.

The Revolution Will Not Be Televised webcast: Jonathan Stark discusses the coming wireless wave and how it will profoundly affect every aspect of society—the iPhone will look like a fax machine compared to what’s coming next. Register for this free webcast.
Date: 10 a.m. PT, June 20 Location: Online webcast

Intro to Raspberry Pi : Ed Snajder explains what a Raspberry Pi is, how it differs from an Arduino and shows attendees some cool things you can do with a Raspberry Pi. Register for this free webcast.
Date: 10 a.m. PT, June 25 Location: Online webcast

Read more…

Comment

Strata Week: Why we should care about what the NSA may or may not be doing

Response to NSA data mining and the troubling lack of technical details, Facebook's Open Compute data center, and local police are growing their own DNA databases.

It’s a question of power, not privacy — and what is the NSA really doing?

PEW graph

Pew Research Center national survey

In the wake of the leaked NSA data-collection programs, the Pew Research Center conducted a national survey to measure American’s response. The survey found that 56% of respondents think NSA’s telephone record tracking program is an acceptable method to investigate terrorism, and 62% said the government’s investigations into possible terrorist threats are more important than personal privacy.

Rebecca J. Rosen at The Atlantic took a look at legal scholar Daniel J. Solove’s argument that we should care about the government’s collection of our data, but not for the reasons one might think — the collection itself, he argues, isn’t as troubling as the fact that they’re holding the data in perpetuity and that we don’t have access to it. Rosen quotes Solove:

“The NSA program involves a massive database of information that individuals cannot access. … This kind of information processing, which forbids people’s knowledge or involvement, resembles in some ways a kind of due process problem. It is a structural problem involving the way people are treated by government institutions. Moreover, it creates a power imbalance between individuals and the government. … This issue is not about whether the information gathered is something people want to hide, but rather about the power and the structure of government.”

Read more…

Comments: 2

Visualization of the Week: NYC Citi Bike use, in real time

Oliver O'Brien has visualized real-time bike share use not only in NYC, but in cities around the world as well.

New York City’s new bike-share program, Citi Bike, has been underway for a couple of weeks now. Its level of success is still up for debate, but the stats are impressive: as of June 10, there had been 173,516 trips traveled over 510,782 miles since the launch. Oliver O’Brien, a researcher and software developer at the Centre for Advanced Spatial Analysis (CASA), and a contributor to OpenStreetMap, has developed a visualization of bike share use in real time.

Read more…

Comment

Ins and Outs of Running MySQL on AWS

Laine Campbell on why AWS is a good platform option for running MySQL at scale

In the following interview, PalominoDB owner and CEO Laine Campbell discusses advantages and disadvantages of using Amazon Web Services (AWS) as a platform for running MySQL. The solution provides a functional environment for young startups who can’t afford a database administrator (DBA), Campbell says, but there are drawbacks to be aware of, such as a lack of access to your database’s file system, and troubleshooting “can get quite hairy.” This interview is a sneak preview to Campbell’s upcoming Velocity session, “Using Amazon Web Services for MySQL at Scale.”

Why is AWS a good platform for scaling MySQL?

Laine Campbell

Laine Campbell

Laine Campbell: The elasticity of Amazon’s cloud service is key to scaling on most tiers in an application’s infrastructure, and this is true with MySQL as well. Concurrency is a recurring pattern with MySQL’s scaling capabilities, and as traffic and concurrent queries grow, one has to introduce some fairly traditional scaling patterns. One such pattern is adding replicas to distribute read I/O and reduce contention and concurrency, which is easy to do with rapid deployment of new instances and Elastic Block Storage (EBS) snapshots.

Additionally, sharding can be done with less impact via EBS snapshots being used to recreate the dataset, and then data that is not part of the new shard is removed. Amazon’s relational database service for MySQL—RDS—is also a new, rather compelling scaling pattern for the early stages of a company’s life, when resources are scarce and administrators have not been hired. RDS is a great pattern for people to emulate in terms of rapid deployment of replicas, ease of master failovers, and the ability to easily redeploy hosts when errors occur, rather than spending extensive time trying to repair or clean up data.

Read more…

Comment

SPTechCon, iPhone Bootcamp, OSCON, and More

Tech events you don't want to miss

Each Monday, we round up upcoming event highlights from the programming and technology spaces. Have an event to share? Send us a note.

HTML5 Application Development Class: This two-day training class offers a small class size and individual attention for developers looking for insights into HTML5 app development. Visit the event page for more information and to register.
Date: June 13–14 Location: San Francisco, CA

The Linux Way: Rebuilding The Unix Way for a New Era webcast: Andy Grover covers ways the Linux platform is shifting away from the Unix philosophy and how hackers and users are defining a new Linux Way, independent from the Unix Way. Register for this free webcast.
Date: 10 a.m. PT, June 14 Location: Online webcast

Read more…

Comment

Strata Week: Wireless body area networks bring humans into the Internet of Things

Humans as nodes, pills and electronic tattoo password authenticators, NSA surveillance leaks, and hiding data in temporal cloaks.

Collaborative sensor networks of humans, and your body may be the next two-factor authenticator

There has been much coverage recently of the Internet of Things, connecting everything from washers and dryers to thermostats to cars to the Internet. Wearable sensors — things like FitBit and health-care-related sensors that can be printed onto fabric or even onto human skin — are also in the spotlight.

Kevin Fitchard reports at GigaOm that researchers at CEA-Leti and three French universities believe these areas are not mutually exclusive and have launched a project around wireless body area networks called CORMORAN. The group believes that one day soon our bodies will be constantly connected to the Internet via sensors and transmitters that “can be used to form cooperative ad hoc networks that could be used for group indoor navigation, crowd-motion capture, health monitoring on a massive scale and especially collaborative communications,” Fitchard writes. He takes a look at some of the benefits and potential applications of such a collaborative network — location-based services would be able to direct users to proper gates or trains in busy airports and train stations, for instance — and some of the pitfalls, such as potential security and privacy issues. You can read his full report at GigaOm.

In related news, wearable sensors — and even our bodies — may not only be used to connect us to a network, but also to identify us as well. Read more…

Comment

Mobile-centric Optimization Requires a Mobile-centric Approach

Appurify co-founders Manish Lachwani and Jay Srinivasan talk about the motivation behind their platform and the solutions it provides.

As our always-on society turns more and more to mobile platforms and devices—a recent Global Mobile Data Traffic Forecast predicted 788 million mobile-only Internet users by 2015—mobile app development is becoming more and more important. Developers, however, are finding mobile measurement and optimization toolsets lacking, which is increasingly becoming an issue as mobile users show low tolerance for buggy apps.

Appurify co-founders Manish Lachwani and Jay Srinivasan experienced these challenges first hand and launched a solution. The duo will demo their Appurify performance-optimization platform during the Lightning Demos at the upcoming Velocity conference. In the following interview, Lachwani and Srinivasan talk about the motivation behind Appurify and offer a sneak peek at what we can expect to see at their demo.

What are some of the key challenges developers face in measuring app performance?

Jay Srinivasan

Jay Srinivasan

Jay Srinivasan: Mobile performance measurement and optimization is broken today. This is a three-fold problem: there are no good tools, the mobile space is complex, and mobile users demand exceptional performance in all conditions.

More specifically, most performance measurement and optimization tools that exist for the web and PC world simply don’t exist for mobile. This is both due to the mobile ecosystem being relatively young as well as the added tech complexity that working with mobile devices offers. Compounding this lack of tools is the complexity of the mobile environment. Mobile is much more fragmented from an operating system, device, and firmware perspective, and optimizations can vary depending on the environment. Mobile users are also more demanding, with the expectation that they can use their smartphones or tablets in an always-on, always-connected environment. Your mobile app needs to load quickly and perform seamlessly in all network and device conditions.

Read more…

Comments: 2

Visualization of the Week: Stravinsky’s “The Rite of Spring”

Stephen Malinowski's latest music visualization celebrates The Rite of Spring's 100th anniversary.

Stephen Malinowski’s hypnotic music visualizations have been quite a hit on YouTube — he has visualized a number of scores, from Debussy’s, Clair de lune to Chopin’s Nocturne in B Major, opus 32 no.1 to his own Fugue in A minor. Anastasia Tsioulcas reports at NPR that Malinowski’s visualizations have garnered more than 100 million page views. And just in time to celebrate the 100th anniversary of Stravinsky’s ballet The Rite of Spring at the end of May, Malinowski created a visualization of the score:

Read more…

Comment