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Why have a website, why create a blog, why Twitter?

Golden Gate Bridge from the northMy esteemed colleague Beah just started blogging, and opened her blog with a very important question – Why Blog?  I remember people asking a similar question years ago when I registered this domain – why would you want to have a website with your name on it?  Almost the same question has come to my mind recently when playing around with Twitter.

So, why blog?  With all the hundreds of thousands of blogs on the web you might think there’s no need to ask this question.  One of the best things about social science is asking questions about things that everyone takes for granted.  Unfortunately the “science” part of social science is a bit too time-consuming to finish up on a Sunday-evening blog post, so instead we’ll look at a few sites of friends and colleagues and maybe collect some thoughts on what motivates people to blog.

First, why do I blog here?  I try to keep this blog relatively professional, posting mostly on topics that I encounter in my work, in my academic research, and in my side projects (the standard disclaimer, as always, applies).  One of my motivations was sharing some of the research done for classwork – it seemed a shame to write up a report, turn it in to a professor, and then let it gather dust in some corner of my hard drive.  My undergrad degree was in journalism and I do miss writing, so that’s another motive.  Also, having been through some rough patches in my career during the dot-com downturn, I thought blogging might help me establish a bit of a professional brand.  I have my URL on my resume and I would hope that any company looking to hire me would get an idea that I’m knowledgeable and interested in relevant areas.

But I’m not a very random sample, so let’s look at a few other blogs and try to appreciate why they write.  I think I can place them into a few rough categories:

Personal takes on professional / technical interests:

This is largely where my blog falls.  Common post topics will include things like “how to get around an annoying issue with some software/programming language,” “very excited about the new device from Apple,” “report from a conference,” and “very disappointed with the new device from Apple.”

Public journaling to keep in touch with friends and family:

I’ve done this in the past as well – blogs taking the place of those old-fashioned mass emails you used to send out freshman year of college.  If you went to college in the ancient days before blogs and Facebook.  This is a place for both epic travelogues and saved IM conversations filled with inside jokes.

Sharing interests and reviews:

This category runs the gamut from folks who just want to show their friends a funny Youtube video to blogging a season of a TV show to reviewers writing prolifically about a very obscure musical genre.

Artistic or literary expression:

Self-publishing has opened the doors for artists and writers, both amateur and professional, to share their work with whatever audience they find.  This can run from virtual serial galleries shows to community-driven commentary and learning.

Of course these all overlap, and some blogs cover all the bases.  See KooKoo for KokoPuffs for an example

So do we answer our question with a plethora of distinct motives for blogging?  Not necessarily.  There’s one theme that runs throughout all of the above – these are all social activities.  Ultimately blogging is human interaction.

Oh, and that other question – why use Twitter?  No clue.

Got a reason why you use Twitter?  Are you a co-worker angry at me for misconstruing your blog?  Please let me know in the comments below.

Google Earth vs. Reality, Revisited

Last week I compared some real-life photos with the same scene in Google Earth.  Since I’m a bit of a computer/mapping/photography geek, I couldn’t resist doing a few more.  That actually ended up being a pretty popular post, with thousands of pageviews, which just goes to show I’m not the only combination computer/mapping/photography geek out there.

Here’s a view of San Francisco from Coit Tower on Telegraph Hill.  Follow this link to see larger versions in Flickr.  This one is even better than the two from last week – look how well the streets, buildings, and Golden Gate Bridge match with the photo.

Google Earth vs. Reality - San Francisco from Coit Tower

Now I’ll go a little more international.  Here’s a photo from the site of ancient Mycenae in Greece.  This is above the famous Lion Gate looking out tat the hills surrounding the Argolid plain.  See larger versions in Flickr.  The aerial photograph that Google Earth maps to the topography isn’t as detailed as the real life photo, but even the borders of the olive groves line up.

Google Earth vs. Reality - Mycenae, Greece

These next two are not as identical as the San Francisco cityscapes, but are still impressive because of how well they evoke the real life scenes without 3-d buildings.

The first is from the Acropolis in Athens, looking out over the surrounding neighborhood.  Larger versions in Flickr.

Google Earth vs. Reality - Athens from the Acropolis

Here’s another shot from the Acropolis showing the new Acropolis Museum.  Larger versions in Flickr.

Google Earth vs. Reality - Athens and the new Acropolis Museum

If you feel like making some comparisons of your own, please let me know in the comments below – I’d love to see what other people could come up with.

Scientific proof that Reddit should add a tagging system

First, a disclaimer: the title of this post is obviously exaggerated. Proof is an awfully big word to throw around, and although I employed pretty good experiment design practices and statistical checks, I can’t really prove that Reddit should do this or that. But I can show that what they are doing now is not working, at least when it comes to search.

So, I got an email the other day letting me know that my article, Tagging and Searching: Search Retrieval Effectiveness of Folkonsomies on the World Wide Web, is being published in the July 2008 issue of Information Processing and Management (here’s the official DOI link to the article). In the study I compared search performance between traditional search engines (like Google), subject directories (like Open Directory), and social bookmarking systems (like Reddit) and their folksonomies.

What’s a folksonomy? The word is a play on the term taxonomy – a taxonomy is a system of organizing and categorizing things, like the Dewey Decimal System. Taxonomies usually follow very strict rules and are controlled by experts. A folksonomy is a system of organization built by large numbers of regular users, who add things to the collection, evaluate them, and usually tag them with keywords.

IR-system-precision-1-20

In my study, the social bookmarking systems with tagging systems did surprisingly well – Del.icio.us was more precise than Open Directory, and at a cut off of 20 results it’s precision was fairly close to that of the search engines.

Reddit, however, did not fare so well. It consistently had the lowest precision, meaning that searches returned very few relevant results. There could be many reasons for this, but the biggest difference between Reddit and the others is the lack of tags.

Now, it’s possible that the folks at Reddit have no interest in search, or information retrieval in general. I think Reddit is very effective at bringing out new and interesting links on a daily basis and encouraging commentary (just my opinion, no stats to back that up). But I think it’s a big missed opportunity not to add tagging and see where it leads.

(One last disclaimer: this post is my personal opinion as someone who enjoys using Reddit and does not reflect on my employer. This post refers to research done independently as a grad student.)