One of the enduring myths of cycle racing concerns the relative merits of tubular tyres relative to clinchers. Convention has it that nothing can compare to the performance of a quality tubular. However, lot of anecdotal evidence is bandied around supporting high quality clinchers as superior to tubulars. I was recently sent a link to test data regarding the characteristics of tyres versus tubulars - this gives clear data to support this contention.', '

Clinchers and tubulars

A couple of images to show the differences between a tubular and a clincher (links to external website images)

Seems to be a week for obituaries. Gary Gygax, who with Dave Arneson wrote the groud breaking tabletop role playing game Dungeons & Dragons, has died. The Register has an obituary, as does the New York Times. I spent a lot of time as a youngster playing a variety of role playing games, beginning with D&D. While I eventually moved on to other games (notably Call of Cthulhu) and eventually gave up gaming, I retain a soft spot for D&D, and particularly the original edition of a boxed set of three slim booklets (pictured left, and see the Wikipedia article).

D&D was derived from earlier miniatures war game rules, and was published by Tactical Studies Rules, later known as TSR. The company grew astonishingly rapidly (probably too fast), before being absorbed by Wizards of the Coast, a company that rose on the back of a craze for trading card games.

Riding the Port Talbot Wheelers 2-up 25 mile event in south Wales has become something of a Team Grumpy tradition in recent years. In the past, the event has been held on the fast R23/3 (or variant) course, which features the improbably fast descent of the Neath bank, a hill that you don' have to go up again! Due to roadworks, last year the event was run on the R25/24, an altogether more realistic course - this course was used again this year. In 2007, the weather was astoundingly vile, torrential rain coupled with strong winds.

Team Grumpy entered the event this year with particular enthusiasm, as we plan to ride the Duo Normand again this year, after missing last year's event. Both Gerry and I always look to this event for a glimpse of our form; this year we were particularly keen as Gerry's had a bad neck, and after a winter of diligent training (well, as diligent as my work life allows), I came down with something that resembled winter vomiting virus exactly two weeks before this event.

This year, I received a series of increasingly gloomy emails with dire weather forecasts from Gerry - on the day, however, we drove over to the HQ in quite pleasant though rather windy conditions. We'd requested an early start as we had a lunch reservation at Y Polyn, a rather excellent restaurant we usually go to after the event, so we were the second team to start. The R25/24 course begins by heading down the Neath valley on a dual carriageway (A465). On the day, this made pretty hard riding, as it was into the teeth of the wind. Fortunately, Team Grumpy were working well, taking spells of about 30sec each. While I felt at the time we were riding rather cautiously, in retrospect I'm glad we kept something back for the hilly second half. After the southern turn, we roared back up the dual carriageway to the halfway point, mostly clocking 30mph or more, before heading south again on the B road that runs alongside the main road. This road's considerably more challenging, with many short steep climbs that throw you off your rhythm. Added to which, there were considerable numbers of road-kill toads! Fortunately the overnight rain had mostly drained away, and other than the aforementioned flattened amphibia, there were no pools of standing water (as there were last year).

I was saddened to read on www.timetriallingforum.co.uk that Sheldon Brown had died (see this obituary). Sheldon Brown's website is a fabulous source of bike information, particularly related to fixed wheel and tandems. He'll be missed worldwide.

I've just received a FrogPad portable keyboard, to use with the OQO UMPC I bought recently. It's Bluetooth enabled. The manufacturers claim one can reach 40wpm quite quickly, even for those who aren't already touch typers. I'm most definitely a "hunt and peck typist", so it'll be interesting to see how this gets on. Besides using the keyboard with the UMPC, I plan to use it with my (hopefully soon to be resurrected) iPaq hx4700 Pocket PC.

This is what a Righty FrogPad looks like (if you click on the image, you should see a life-size version). I bought the Lefty version, in white, with the intention that this would leave my right hand free for mouse or stylus use.

Physically, the unit seems pretty robust, with a slide on cover. It comes with a CD with a typing tutor (for Windows and Mac, but the Windows version seems to work OK on Linux under Wine), a retractable USB power cord and mains adaptor, and several leaflets and manuals.

Groklaw has a story linking the current MSOOXML deliberations to a Microsoft strategy document that's in the public domain thanks to at least one anti-trust case. (Note that it's a big pdf file, and that the groklaw story has it as text). The Groklaw story has many comments, and is worth reading. Is this normal behaviour for a company, or am I just naive?

Having looked at that document, this news story (Gates to tap young minds) sent shivers down my spine.

Well, actually, a bunch of American Baptists burnt an effigy of Richard Dawkins. It is pretty impressive that standing up for your views on life and religion can provoke such a response. On the other hand, they also burnt an effigy of Hillary Clinton (reportedly described by the fruitcakes as "a Hitler named Hillary Clinton – the anti-God baby killer who plans to turn the United States into Sodom and Gomorrah").

Wild stuff in the realms of a "god" who's believers claim is kind and benificent. Me, I rather like Dawkins' portrayal of the Old Testament god in The God Delusion. I notice the amazon.co.uk listing has garnered 700 reader reviews, which seem on first glance to be very polarised...

My friend and colleague Lynne Cox is chairing the organising committee of a meeting to be held at Oriel College, Oxford, in July 2008. This meeting promises to be an excellent opportunity for networking and establishing collaborations in this field. Lynne asked me to join the committee and design a website.

Click on the meeting logo to visit the conference website.

 

I have occasionally linked to news items relating to Microsoft's dubious tactics aimed at getting ISO ratification of its 6000 page OOXML file format as an international standard. Now the European Union has waded in with an investigation into Microsoft's actions. Reports from CNN and The Wall Street Journal. See also Groklaw's chronology page on office file formats, which provides a huge set of links to provide background to the situation

 

After buying a Squeezebox music player, I have recently been considering various formats I have music in, their relative merits (both sonically and aesthetically), and their convenience. Over the years, I've acquired a fair sized collection of vinyl records. To be honest, I rather like them - there's a sense of having to look after them, and the artwork of the sleeves has the capacity to be far superior in most cases to that of CD covers. Currently I use a Rega Planar 3 turntable for playback through a Naim Nait 3 integrated amplifier. They sound pretty damned good, too.

Of course convenience leads us all to CD. I have a good number of these now, and a Naim CD3 CD player.

What's prompted this discourse has been my purchase of a Squeezebox. This is a smart device, that runs an embedded Linux and hooks up through the wireless network to a fileserver holding audio files. The Squeezebox is in turn connected to the amplifier. It can play a wide variety of file formats, including mp3, ogg and flac. So. I've been ripping CDs to disk, and using the Squeezebox for playback. Is the quality good? Well, I guess not as good as CD, but that's countered by the sheer convenience!

XO Laptop: It's the Software, Stupid! - A nice post about how the OLPC empowers kids creatively. A riposte to a number of rather scurrilously negative posts circulating on the web.

Timetriallists spend rather an undue amount of time worrying about the aerodynamics of their bikes and of their body position on said bikes. I guess at least it's easier than training! Wheel aerodynamics are a frequent topic on discussion fora, but often the data are either non-existent or are derived from wheel manufacturers and are therefore unlikely to be impartial. As part of an ongoing review of bicycle wheels, www.rouesartisanales.com have put a detailed study of the aerodynamics of a variety of bicycle wheels online. The study has previously been published by the magazines Tour and L'Acheteur Cycliste.

The test setup

As with most such tests, the basis here is that the wheels are placed in a wind tunnel (the web page has some detailed images of various elements of the setup). The wheel under test appears to be fixed to an inverted fork, on which there are electrical strain gauges - effectively, these are what assesses the aerodynamic drag. The wheels are said to spin in air air flowing along the wind tunnel: it's not clear whether the wheels are driven, whether they spin due to the air flow, or whether this refers to a pivot that allows the wheel to experience air flow at different angles of attack. Drag was measured at wind angles 0 to 35 degrees. Because the more extreme win angles are infrequently experienced on the road, it seems that an average drag value is computed by giving less weight to the more extreme angles, and greater weight to smaller angles. This is indicated by the Gaussian curve in the graph.

My Pocket PC (an HP iPaq) broke recently, and while I was scanning various online emporia for a replacement, came across the OQO O+ UMPC, which was a clearance item at Expansys. Since one of the main reasons for using the Pocket PC was as a means of tracking my cycle training, I thought a miniature PC running WinXP might be useful. The other significant use would be for delivering presentations. So, how does the device stack up? And given this is the old model, now replaced by a slightly more powerful device running Vista, are these comments valuable?

Hardware specs:

I don't read a lot of fiction, but this novel was quite appealing in its subject matter. Written by "Anonymous" (the author would appear to be auniversity academic), the novel is an accurately targeted satire on modern university politics and life. It was lent to me by a colleague, who'd bought it for holiday reading over Christmas.

The principal character is a well to do Professor of Christian Ethics. He's married to lower aristocracy and is successful in academic, if not in modern RAE terms. He is a few years short of retirement, and clearly doesn't fit the bill in terms of academic style. In response to an accusation of sexual harassment, he's hauled over the coals by university officials, many with unhelpful (to the main character) relationships with each other - accusations of bullying and libel fly.

It was a quick and quite entertaining read, though I found the writing style rather unexceptional. nd finally, how does it work as holiday reading? Unfortunately, it is so close to the truth of University politics and devious machinations that at times it really isn't pleasant to read! This hasn't stopped me from borrowing the sequel "Degrees'r'Us".

The GNU General Public Licence (GPL) is one of the most (if not the most) widely used licence under which open source software is released. There's a Wikipedia page on the GPL (but be cautious as with all Wikipedia pages on contentious topics). Recently the author of two software packages (atscap and pchdtvr) has announced that he has revoked their licensing under the GPL. This has predictably released a storm of comment on the internet. As usual, the best coverage is over at Groklaw, where PJ has provided a clear analysis of whether the software author can indeed take such an act, and many of the regular contributors add observations.

It's not clear whether the author of the software and the author of the announcement are indeed one and the same, and on the basis of PJ's article it doesn't look as though he can actually revoke the GPL. It is possible that some attempt to challenge the GPL is being made (but this has been tried before in several jurisdictions, without success).

It isn't clear why the software author is taking this step. A change of heart regarding FOSS? Patent infringement (in which case the problems lie only in those jurisdictions where software patents are permitted)? Perhaps over the next few days, these issues will be clarified.

Envisioning Information by Edward R. Tufte

I got a copy of this book over the Christmas period (I now have all four of Tufte's books). This follows the pattern of the other three - beautiful production values, and an authoritative view (some might say didactic!) of design as applied to the graphical display of information. The book was originally published in 1990; the copy I have is the 10th printing from 2005.

The book has six chapters: Escaping Flatland, Micro/Macro Readings, Layering and Separation, Small Multiples, Color and Information, Narratives of Space and Time, and finally a brief Epilogue.

A neat spoof of the (ab)use of physics terminology for explaining homeopathic effects.

Picked this one up from this week's Swift (18/1/08).

P.J., who runs the famous blog site Groklaw, has received her OLPC (those lucky enough to live in , or have an address in, North America can order one on a "buy one, give one" arrangement), under the most exciting circumstances, as she relates in Groklaw today. The pictures of the kids with their OLPCs are great!

Also worth reading is this item from linux.com. It gives a nice overview of how the device operates. Incidentally, I have an earlier version of the OLPC's OS, Sugar, running in the emulator qemu on a Linux laptop. From the two articles that form the basis of this item, I would judge that kids have no issues with using Sugar, and that posts such as this one are misguided. The standard conventions of the typical PC desktop environment are not actually intuitive, as anyone who has tried to get someone who genuinely has no computer experience up and running with a relatively modern computer will know.

David Colquhoun's blog "DC's Improbable Science" often takes issue with quack medicine. I noticed this article on the spread of quack medicine quangos - it's well worth a read, as is the article over at quackometer.', '

Two quango-style organisations are discussed: the Natural Healthcare Council and Skills for Health. The NHC (a nice authoritative sort of abbreviation, no?) has been set up by the Prince of Wales Foundation for Integrated Healthcare through funding from the Department of Health to regulate 12 alternative therapies, such as aromatherapy, reflexology and homeopathy. The problem here is that none of these mumbo-jumbo therapies work (other than via a placebo effect, I guess). Isn't this just money down the drain? And worse than that, should we encourage the public to genuinely believe these "therapies" offer any kind of real health benefit?

Skills For Health appears to be a real ticky-box mentality run riot. It offers competency descriptors for dubious alternative medicine practices, and is also informed in this endeavour by Prince Charles' Foundation for Integrative Health. How about this description of a homeopathy "skill competence":

Presentations, software and design

Over the last few months, I've read several books and articles that concern the graphical presentation of data and information using presentation software, such as PowerPoint and OpenOffice.org Impress (both of which I have used a lot) and Keynote (which I have never used. I am approaching the problem of presentation from the angle of making scientific presentations, often with considerable quantities of complex data.

Edward Tufte on the cognitive style of PowerPoint