Quick note to self, having stumbled on the Wikipedia page on transitive reduction. Given a graph like this: the transitive reduction is: Note that the original graph has an edge a -> d, but this is absent after the reduction because we can get from a to d via b (or c). What's the point?

Paulo Nuin recently interviewed me for his Blind.Scientist blog. The interview is part of his SciView series.

One side effect of the trend towards digitising everything is that stuff one forgot about (or, perhaps, would like to forget about) comes back to haunt you. My alma mater , the University of Auckland is digitising theses, and my PhD thesis "Panbiogeography: a cladistic approach" is now online (hdl:2292/1999). Here's the abstract: Ah, happy days...

Slides from the recent Phyloinformatics workshop in Edinburgh are now online at the e-Science Institute. In case the e-Science Institute site disappears I've posted the slides on slideshare. | View | Upload your own Heiko Schmidt has also posted some photos of the proceedings, demonstrating how distraught the particpants were that I couldn't make it.

Interesting paper in PLoS ONE (doi:10.1371/journal.pone.0001124) on the quality of data housed in GBIF. The study looked at 630,871 georeferenced legume records in GBIF, and concluded that 84% of these records are valid.

Really just a shameless attempt to get one over David Shorthouse, but there has been some buzz about Very High Resolution X-Ray Computed Tomography (VHR-CT) of a fossil of Cenotextricella simon . The paper describing the work is in Zootaxa (link here). Zootaxa is doing great things for taxonomic publishing, but they really need to get some sort of stable identifier set up. Linking to ZooTaxa articles is not

Following on from the discussion of BHL and DOIs, I stumbled across some remarkable work by Robert Cameron at SFU. Cameron has developed Universal Serial Item Names (USIN). The approach is spelled out in detail in Towards Universal Serial Item Names (also on Scribd). This lengthy document deals with how to develop user-friendly identifiers for journal articles, books, and other documents.

No, not taxonomy the discipline (although I've given a talk asking this question), but taxonomy.zoology.gla.ac.uk, my long-running web server hosting such venerable software projects as TreeView, NDE, and GeneTree, along with my home page.

In a series of emails Chris Freeland, David Shorthouse, and I have been discussing DOIs in the context of the Biodiversity Heritage Library (BHL). I thought it worthwhile to capture some thoughts here. In an email Chris wrote: I think the perception that there are two "camps" is unfortunate.

Argh!!! The phyloinformatics workshop at Edinburgh's eScience Centre is underway (program of talks available here as an iCalendar file), and I'm stranded in Germany for personal reasons I won't bore readers with. The best and brightest gather less than an hour from my home town to talk about one of my favourite subjects, and I can't be there. Talk about frustration!

The kind people at Nature have taken pity on my rapidly fading research career, and have highlighted my note "Towards a Taxonomically Intelligent Phylogenetic Database" in Nature Precedings (doi:10.1038/npre.2007.1028.1) on the Nature web site. Frankly this is probably the only way I'll be getting into Nature ...