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With so many websites to join, users must decide where to invest significant time in adding their same connections over and over. For developers, this means it is difficult to build successful web applications that hinge upon a critical mass of users for content and interaction. With the Social Graph API, developers can now utilize public connections their users have already created in other web services. It makes information about public connections between people easily available and useful.

NodeXL is a template for Excel 2007 and 2010 that lets you enter a network edge list, click a button, and see the network graph, all in the Excel window. You can easily customize the graph's appearance; zoom, scale and pan the graph; dynamically filter vertices and edges; alter the graph's layout; find clusters of related vertices; and calculate a set of graph metrics. Networks can be imported from and exported to a variety of data formats, and built-in connections for getting networks from Twitter, Flickr, YouTube, and your local email are provided.

Goodhart's law states that once a social or economic indicator or other surrogate measure is made a target for the purpose of conducting social or economic policy, then it will lose the information content that would qualify it to play such a role.

Is Goodhart's law relevant when thinking about Learning Analytics

How to create annotations in a Moodle discussion forum.

Can also probably use Diigo to do something similar (e.g., via public sticky notes). Always wonder if that's rude though...you don't give the Moodling person (who might not be using Diigo or the annotation tool) the oppt to respond.

Infochimps receives thousands of visitors every week hungry for interesting data. Unlock the value of your data by selling it on our open platform. Or put it up for free for public benefit, and get exposure for your work.

My take on this week's readings and webinar

Cloudera is a company that helps developers with big database problems. Here the CEO Mike Olson gives us a tour through the major database changes that are hitting lots of startups now.

Ian Ayres visits Google's Mountain View, CA headquarters to discuss his book, "Super Crunchers: Why Thinking-by-Numbers Is the New Way to Be Smart." This event took place on November 8, 2007 as part of the Authors@Google series.

Stephen Wolfram, creator of Mathematica, talks about his quest to make all knowledge computational -- able to be searched, processed and manipulated. His new search engine, Wolfram Alpha, has no lesser goal than to model and explain the physics underlying the universe.

We've written a series of how-to guides explaining how we collected the data. Most of the techniques are within the ability of the moderately experienced programmer.

But the bigger point is, adding more, independent data usually beats out designing ever-better algorithms to analyze an existing data set. I'm often suprised that many people in the business, and even in academia, don't realize this.

You know your data is big - you found Hadoop. What implications must you consider when working at this scale? This lecture addresses common challenges and general best practices for scaling with your data.

20 years ago, Tim Berners-Lee invented the World Wide Web. For his next project, he's building a web for open, linked data that could do for numbers what the Web did for words, pictures, video: unlock our data and reframe the way we use it together.

This document was an attempt to persuade CERN management that a global hypertext system was in CERN's interests. Note that the only name I had for it at this time was "Mesh" -- I decided on "World Wide Web" when writing the code in 1990.

A documentary by Kate Ray