Category Archives: Uncategorized

Book review: The Artist’s Guide to GIMP

I just reviewed The Artist’s Guide to GIMP over at my open source blog. Overall, it’s a nice introduction to the free image editing powerhouse that is the GIMP – the book is packed full of interesting projects that seem pretty easy to follow, written in a refreshingly waffle-free manner. It would make a good read for web developers, computer artists, and Photoshop whizzes interested in moving over to the right side of the proprietary software divide alike (although the bits on photography have some rough edges).

See here for the full review.


Collective Marvelling

Shaun Hotchkiss has rounded up a few young upstart science bloggers, including myself, and proposed that we form a research blogging network. Check us out over at Collective Marvelling!

Colours in the Mac OS X terminal

My snobbish conviction that Mac OS X is somehow an inferior operating system has been growing of late. I long to install Ubuntu 12.04 on my Power Mac at work (centrally managed by Oxford Physics IT services), just so that I don’t have to recompile every bloody component of my toolchain every time I start a new project.

Anyway, for evidence that Mac OS X isn’t a “proper” operating system, note the lack of colours in the default terminal profile. Microsoft Windows (vehemently not a proper operating system) also lacks colours on the command line by default. You do the maths.

To get colours in the terminal on a Mac, add the following to your ~/.bashrc:

export CLICOLOR = 1


I like to think that, 18 months (and three papers) into my PhD, I’ve learned a lot about how science works. The naive beliefs of my undergrad days have all but vanished, replaced with (presumably) slightly less naive ones. Science is messier than I thought, less “clean”. Things go wrong, mistakes are made, guesswork reigns, and absolute rigour is never attained. People, personalities and politics play a big role; egos and reputations are involved, and disagreements are common. Motivations are varied; not everyone is committed to some uniform ideal of “discovery” or “openness”. Science is a career like any other; success is not guaranteed, hard choices and sacrifices must be made, and some form of work/life balance attained. (By now, you might be thinking that I’ve been reading a little too much of PhD Comics, or that my supervisor has had the “getting a job” talk with me. Correcto.)

But while it’s easy to find expositions on the hidden flaws of academia all over the web, there have been plenty of pleasant aspects that I wasn’t expecting either. One thing that I’ve been getting a kick out of recently is exposure, or “recognition”, of my work. Although still decidedly a newcomer to the rarefied cosmological subfields in which I work, I’ve now put out enough papers and shown my face at enough conferences that some people know who I am and what I’ve been doing. So, when a scrap of evidence that someone cares about my work appears, it’s a great feeling. The novelty will wear off, I’m sure, and it’s hardly the reason I get up in the morning, but it is nice.

Some of the exposure that I’m talking about could be reasonably well expected, since my seniors in the department talk about it often enough. Citations? Check. Emails from other researchers? Yep. Cranks emailing me? Of course. But a couple of recent events were particularly pleasant, and wholly unexpected.

The first was having our kSZ+voids paper mentioned in Ellis, Maartens and MacCallum’s new textbook on relativistic cosmology (which looks excellent, by the way). Although I don’t believe that textbooks have any special claim to authority over other media, the fact that the paper is mentioned in one amplifies the feeling of having contributed something to the state of human knowledge, however minor. Maybe it’s my perception of books as being relatively permanent entities that does it? I should carve the damn thing in stone if that’s the case.

The second was being approached by a journalist and interviewed, by email, about some of my research. Some of this appears in a story about alternatives to dark energy on the PBS NOVA physics blog. That was an interesting experience too, and I like the idea that members of the general public will gain some insight into what I’m working on. Of course, I was exposed to some of the harsh realities of science/media interaction in the process – the story paints a very simplified picture of a complicated area of study, fails to credit lots of people who made important contributions, etc. (although for what it’s worth, I think the author, Charles, did a pretty good job). But it was still a good feeling to see my stuff mentioned in print (as it were).

I don’t anticipate changing my stance of “doing science because it’s interesting” and becoming a publicity whore off the back of these, but they put a smile on my face nevertheless.

It all started with a…

Bang! I’ve been blogging about open source software and the like over at LiveJournal for the best part of a decade now, but that only represents one of my many and varied (ahem) interests. I’m also a postgrad at the University of Oxford, working on problems in theoretical cosmology in the astrophysics department, and thought that now might be a good time to… well, blog about physics for a bit. I reckon this will end up as a “research blog”, a place to bang on about my latest paper, and moan about how under-appreciated my particular narrow field of study is within the cosmology community as a whole. Sounds fun, right?