Detecting ISPs that violate network neutrality

By Noah | August 21, 2011

Dan Kaminsky has a really interesting talk at Chaos Communication Camp 2011 showing how to quite reliably detect ISPs that artificially delay traffic to particular sites (video of Dan’s talk).

Note that the first 2/3 of the talk is a very interesting exploration of the security characteristics of Bitcoin, also showing how the Bitcoin database can be used as a peristent shared store. The latter third of the talk introduces Dan’s tools for detecting artificial delays introduced by ISPs.

Topics: Web, Internet, Computing | No Comments »

Four Rock City Band appearances in May

By Noah | May 3, 2011

I have gotten out of the habit of announcing all of our Rock City Band appearances here on the blog, in part because I’m now keeping a mailing list for those who are interested. May is a particularly busy month for us, with four appearances coming up, so I thought I’d make an exception and post again here. We’ll be appearing:

May 7 (this Sat): Princeton Station, in Chelmsford, MA (on Route 4, just east of Route 3)
May 13 & 14: The Haluwa Lounge, in Nashua, NH (in the Nashua Mall, exit 6 off Route 3)
May 28: Back at Princeton Station one more time

All shows start at 9 PM, and there’s no cover at either Princeton or the Haluwa. I expect to be playing bass all four nights.

If you’d like to be on the mailing list to get announcements of all our gigs, please e-mail me at “blogmaster AT arcanedomain DOT com”, making the obvious substitutions for AT and DOT.

Noah

Topics: Music, Non-technical | No Comments »

Why the New York Times paywall is not like public radio

By Noah | March 29, 2011

One of the excuses that’s been trotted out by several commentators in defense of the New York Times paywall is that it’s “just like public radio”. Well, no. When I contribute to public radio, which I do, my contribution helps make all of that content freely available to everyone. If I “contribute” to the New York Times paywall, I’m buying myself access, and supporting a model in which valuable Web content is only available to those who can afford it.

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Topics: Non-technical | No Comments »

Documents in applications

By Noah | March 8, 2011

It has become fashionable to divide Web resources into two broad categories: each resource is either a document, rendered primarily in HTML, or an AJAX-style  Web application that uses Javascript to facilitate very dynamic interaction, navigation and information retrieval.  My purpose here is to argue that we need to be more careful, that many AJAX applications in fact provide access to documents after all, and that the Web would be much more robust if we took some care to identify and access those documents using the same sorts of URIs that we use for other Web documents.

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Topics: Web, Internet, Computing | No Comments »

Rock City Band March 2011 Appearances

By Noah | March 7, 2011

Rock City Band is appearing for two nights, March 18 & 19th, at Princeton Station in Chelmsford, MA.  We’re on from 9PM to 1AM both nights. We’ve got three more gigs in early April too.

Topics: Boston area, Music, Non-technical | No Comments »

Jeni Tennison appointed to the TAG

By Noah | March 7, 2011

When I said all those nice things about Jeni Tennison yesterday I was not yet aware that she had been appointed to join our W3C Technical Architecture Group. Well, now she has been. Terrific news for us and for the Web!

Topics: Web, Internet, Computing | No Comments »

Jeni’s terrific post on #!

By Noah | March 7, 2011

There are excellent introductions to the !# controversy available from Tim Bray (Broken links) and Mike Davies (Breaking the Web with hasb-bangs), but Jeni Tennison last night posted a truly remarkable, detailed and insightful analysis. Very, very highly recommended. I confess that I’m not entirely comfortable with her conclusion that “hash-bang URIs are an important pattern that will be around for several years because they offer many benefits compared to their alternatives”. My own opinion is closer to: avoid these wherever possible, particularly for document-oriented content. Still, Jeni’s analysis is terrific, and she’s got good links to many other postings.

Topics: Web, Internet, Computing | No Comments »

Updated post: what’s that AF-ON button for anyway?

By Noah | February 13, 2011

I’ve added a brief new section titled “Exposure and AF-ON” to the entry DSLR hint: what’s that AF-ON button for anyway?

Topics: Photography | No Comments »

Four Rock City Band gigs in the next 3 weeks

By Noah | January 30, 2011

I’ll be playing bass for Rock City Band four times in the next few weeks:

Come on out and join us! The Princeton and Haluwa shows start at 9PM and go until about  1AM. I think at Bentley we play two sets, starting at 9:40 PM and ending at 12:30 AM. We play covers ranging from the 60’s (Blues Brothers, Sam & Dave, Beatles) to the present (Lady Gaga, P!nk, Black Eyed Peas, Kings of Leon). If you need directions or more information, let me know (contact information can be found on the About this blog page).

Topics: Boston area, Music, Non-technical | No Comments »

Some interesting readings in Computer Science

By Noah | January 21, 2011

I’ve just posted on the  main Arcane Domain Web site a short bibliography of Computer Science papers that I have found to be particularly worthwhile.  There’s no attempt here to be comprehensive or balanced. Rather, it’s a list of papers that I think are interesting, well written, of unusual historical significance, or just under-appreciated. A few are quite obvious or well known, but I’ve tried to emphasize some that may be less familiar, especially to those who started their work in CS more recently.

By the way, Alan Kay used to have some wonderful online lists of recommended readings, and I haven’t been able to find them lately.  Anyone know whether they’re still posted?

Topics: History of computing, Web, Internet, Computing | 2 Comments »

Joining the band

By Noah | January 3, 2011

After several years as the backup, I’ve just joined Rock City Band as their full time bass player — first gig is this Friday, January 7th, at Princeton Station in Chelmsford, MA, 9 PM to 1 AM.  We’ll also be welcoming back the terrific Brenda White as our lead vocalist.  Schedules, song lists, and other information are always available on the band’s Web site. If you’re north of Boston, come on up and see us!

Topics: Music, Non-technical | 2 Comments »

The Web is 20 Years Old Today

By Noah | December 25, 2010

Twenty years ago today, on December 25th, 1990, Tim Berners-Lee and Robert Cailliau first successfully connected a browser to a Web server — the Web as an operational system is 20 years old today.

Topics: History of computing, Web, Internet, Computing | 2 Comments »

Guitar builder & picker Wayne Hendersion interviewed on NPR

By Noah | November 27, 2010

NPR’s On Point recently broadcast an interview with guitar builder and world class picker Wayne Henderson.  If you love guitar, do check it out.  Among other things, Henderson plays a very nice version of Doc Watson’s Nothing to It.  Indeed, Henderson has built instruments for Doc Watson and Eric Clapton, etc.  Highly recommended.

Topics: Music | No Comments »

Norm Walsh on XML and JSON

By Noah | November 17, 2010

There’s been a lot of fuss lately about the widespread adoption of JSON for Web APIs, and a sense in some quarters that this represents a failure for XML.  Norm Walsh has a new post summarizing the pros and cons of JSON vs. XML,  and as usual, Norm has it exactly right:

(somewhat rearranging Norm’s text):

In short, if all you need are bundles of atomic values and especially if you expect to exchange data with JavaScript, JSON is the obvious choice. I don’t lose any sleep over that.  […] XML wasn’t designed to solve the problem of transmitting structured bundles of atomic values. XML was designed to solve the problem of unstructured data. In a word or two: mixed content. […]   I’ve seen attempts to represent mixed content in JSON and simple they aren’t. 

XML deals remarkably well with the full richness of unstructured data. I’m not worried about the future of XML at all even if its death is gleefully celebrated by a cadre of web API designers. […] I look forward to seeing what the JSON folks do when they are asked to develop richer APIs. When they want to exchange less well strucured [sic] data, will they shoehorn it into JSON?

That is indeed the tradeoff.  If you want to send along a list of job applicants and their recent salaries, JSON does fine;  if you want to send their resumes, well JSON isn’t quite as helpful.   A surprising amount of the world’s important information is in just such semi-structured documents.  Think insurance policies, shop manuals, and even Web pages themselves.  XML is designed to provide a standard means for encoding and interchanging such information, with good enough pure data facilities that if you then want a unified framework to also handle the applicant list, you can.  When you prefer a simpler, more Javascript-compatible means of exchanging simple data, by all means use JSON.

Topics: Web, Internet, Computing | 8 Comments »

DSLR hint: what’s that AF-ON button for anyway?

By Noah | October 6, 2010

Somewhat to my surprise, the photography postings in this blog continue to be by far the most popular.  So, here’s another.  This time I want to share some thoughts about careful focusing, and in particular, how and why to use the AF-ON button that’s on some advanced DSLR cameras.  If the camera is capable of focusing automatically as you release the shutter, why would you set set it to use a separate focus button?  It took me awhile to figure that out, but now AF-ON is one of my favorite features.

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Topics: Photography | 9 Comments »

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