OS X Lion available for download

Ars Technica has a detailed 19-part review of Mac OS X 10.7 Lion

My take: this new version is a big deal and changes some pretty fundamental things both under the hood and in terms of how you actually use your computer. It will break some old software. Don’t upgrade lightly before checking whether the change will break something really important to you.

Also, you may never really have control of your files in the same way again. With the pervasive new autosave system, OS X will have a mysterious new relationship with them.

Chess in Ottawa

Previously, I mentioned the idea of free informal chess in Centretown.

Tomorrow – July 19th – I will be at the Bridgehead at Bank and Gilmour at 5:30pm. I will bring along one chess set and my chess clock.

Anyone who is interested is encouraged to stop by, bringing gear if possible. I will be around until just before eight.

[Update: 30 July 2011]

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Don’t kill the Webb!

With the last Space Shuttle mission ongoing, people are naturally asking what the future of space exploration is going to be. It seems clear that ambitious plans like a manned mission to Mars are a non-starter in the current fiscal climate. That being said, one of the major reasons why such missions are basically off the table is because they are not very useful. It would be very difficult to get human beings to Mars and then return them alive to Earth, but it wouldn’t teach us much about the universe.

By contrast, the James Webb Space Telescope is designed to be the successor to Hubble: one of the most successful scientific instruments of all time. Much of what we know about the universe has been established, confirmed, or refined using data from that instrument. As such, it is saddening to hear rumours that the Webb telescope may be scrapped fur budgetary reasons, if NASA experiences funding cuts of a certain magnitude.

It seems to me that would be a great shame. While the Webb will cost billions of dollars, it will also actively push forward the boundary of human knowledge and give us a better sense of what the universe is like. Launching it is something that humanity ought to do, even if we are experiencing economically difficult times. Basic science is something that builds upon itself, as new data is collected and new experiments are carried out. It is impossible to know in advance what the consequences of some seemingly obscure bit of cosmology or astronomy or physics will be. For instance, who would have predicted that special relativity would one day permit the precise geographic location of inexpensive receivers, using coordinated time signals from satellites (GPS).

For the sake of the important human undertaking of understanding our universe, we should find the money for the Webb.

A Venomous Life: The Autobiography of Straun Sutherland

One of the more entertaining segments in Douglas Adams’ extremely entertaining book Last Chance to See concerns Straun Sutherland, an Australian doctor who counselled Adams on the dangers associated with venomous wildlife in the region Adams was visiting. While definitely entertaining overall, Sutherland’s autobiography could have used more aggressive editing, particularly when it comes to deciding which accounts will be of interest to readers.

In particular, Sutherland devotes far, far too much time to giving his account of various bureaucratic disagreements at the laboratories where he mostly worked. About half the book consists of this. It may have been satisfying for him to lay out his version of events and settle some scores, but aside from the people directly involved in the incidents described, I doubt anyone in the world cared. If I ever write an autobiography, please insist on me removing all such material.

While he speaks at enormous length about bureaucratic squabbles, Sutherland generally only alludes to the more important personal aspects of his life. Dissolving marriages get brushed upon for one sentence, before he moves back to discussing bureaucratic politics at length. Similarly, his references toward the end of the book to his own neurological condition are somewhat unclear.

One frustrating thing about this book is Sutherland’s sometimes-playful-sometimes-maddening fondness for making improbable but possible claims. It may be harmless enough to claim that as a child he made one cinderblock bomb powerful enough to send another cinderblock bomb high enough to be “a little black dot high in the sky” (I suspect any explosion that powerful would have seriously injured or killed the child who initiated it). Similarly, to tell a story about a fellow sailor buying a watch that turned out to be powered by a cockroach attached to the machinery (surely more difficult and costly for a watch counterfeiter than just using a spring or motor). When he talks nonchalantly about a man about an aircraft carrier getting sucked into a jet engine, it isn’t clear if he is giving an honest account in a spectacularly understated way or whether he is telling a very dark sort of joke. In many parts of the book, it is hard to assess the reliability of the narrator, even about serious matters.

That story does connect to one of the more interesting things about the book – the accounts of deaths. It’s not something that happens to anywhere near the same extent in your ordinary autobiography. Characters are introduced and promptly die. Of course, doctors witness the deaths of many more people than members of the population at large. Venom doctors particularly, I expect. The descriptions of death did give me a better sense of what a life as a doctor might be like, and what kind of temperament is suited to it. While the subject matter is often morbid, Sutherland maintains a jovial tone. That is also what made the account of him so entertaining in Adams’ book.

One last quibble is that some of the science and medicine in the book could stand to be a bit more clearly and elaborately explained. Sometimes specialist terms are used as though the reader should already be familiar – which is a bit of a stretch, when the subject matter is venom chemistry or obscure aspects of human or animal anatomy.

The things I enjoyed most about the book are Sutherland’s account of his time in the navy, as well as his descriptions of menial jobs he took while in medical school. There are also some entertaining and enlightening accounts of the practice of medicine in various contexts, from a navy ship to a small community to a research laboratory. Sutherland is quite a character and an entertaining writer. It would have been nice if he had been a touch clearer about when he was being completely serious, and less focused on writing an account of the bureaucratic structure and history of the labs where he worked.

Free casual chess in Centretown

I have tried the chess club that meets on Sundays near Billings Bridge, but I have some objections. They only seem to play bullet chess, with five minutes of time per side. I don’t think that allows enough thinking time. Also, they wanted money almost immediately.

It is appealing to arrange a situation where people in central Ottawa can meet to play informal chess for free, using whatever time controls they like.

One idea would be to meet on Tuesday nights between about five and about eight. People could bring their own boards and clocks and play against like-minded amateurs. Any takers?

[Update: 30 July 2011]

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Recent lessons from the NPR Planet Money podcast

Arguments and ideas featured in recent Planet Money podcasts:

It’s a good podcast.

Macs are also vulnerable

If you think your computer is secure because it is a Mac, you are dead wrong. The latest patch for OS X – 10.6.8 – contains 29 patches for security holes that allow arbitrary code execution. Any of those holes could be used to totally own your computer, circumventing any antivirus or encryption software you may be running. These 29 have been patched, but you can be sure there are others in the OS and in popular software like Flash and Adobe’s PDF reader.

If you want to keep a system safe, keep it physically disconnected from the internet.

Fischer Random Chess

Those who are looking to become decent chess players seem to need to learn a repertoire of openings, tactical skills, and endgame patterns.

With standard chess, that seems to involve a lot of memorization, especially insofar as openings are concerned. They have largely been analyzed with computers, and people know what the strongest lines and responses are (though there are novelties in top-level play).

Fischer Random Chess is a bit encouraging in that it reduces the usefulness of memorization and forces a bit of creativity into every game. By randomizing the position of the back-row pieces like knights and bishops, it creates a wide variety of different starting positions. It is not feasible for human beings to memorize ideal lines in all of them, though computers will surely be able to do so eventually.

For the moment, however, during games between human beings, Fischer Random Chess seems to have good potential as a way of make the game more about realizing the implications of positions that are new to you, and less about remembering ideal responses calculated elsewhere.

Take rainbow tables out of chess! (at least some of the time)

P.S. The Chronos GX chess clock can produce randomized positions for ‘Shuffle Chess’, but it does not follow the Fischer Random Chess rule about having the king between the rooks. I wish it did, since I think Fischer Random Chess is likely to produce more balanced results than completely random shuffle chess, in terms of reducing the number of positions in which white has an overwhelming first-mover advantage and making castling reasonably fair and simple.

P.P.S. The Fischer Random rules are also probably better than shuffle chess insofar as they produce a game more similar in character to chess. It’s like chess, but with less focus on memorization. It’s not a totally different game.