Normally, grocery shopping is not a highlight of my week. Occasionally, however, I stumble upon a bargain that makes it altogether more pleasurable. Today I found some button mushrooms going for about a third of their usual price, as they were approaching there sell-by date (but still looked in pretty good condition). Needless to say, these came home with me and were cooked up for my tea with garlic, olive oil, butter and a bit of salt and pepper. Very tasty and a great way to show I can write short blog posts if I put my mind to it.
Posted by Magnus on 2016/03/23
For quite a long time now, I’ve had at least a theoretical grasp of the importance of correct torque settings for bike mechanics. Recently, though, I had practical confirmation of this — and of why my recent purchase of a torque wrench was money well spent. In the process I also discovered a handy alternative to my previously limited repertoire of ways of dealing with a stripped screw head.
Torque is essentially a measure of turning force and in this context it amounts to how tightly you do up your nuts (stop sniggering at the back there!). If you want to know more about the gory details, Google can furnish you with many happy hours of reading material.
The reason that torque is important for bike mechanics (and I’m sure also for many other engineering-related disciplines but I’ll try to stay focused here) is that if you don’t tighten up nuts and bolts sufficiently, parts tend to drop off the bike at inopportune moments, while if you overtighten them you not only make them harder than necessary to remove when the time comes for maintenance but run the risk of doing damage to various components. Unfortunately, while it’s generally fairly obvious which bits need to be tightened a lot and which bits can and should be left looser (though there may be a few surprises in store), it is pretty difficult – even with quite a lot of experience – to correctly judge torque settings by feel alone. As a rule of thumb, which seems to be borne out by my own experience, the tendency is to overtighten parts which shouldn’t be too tight and to insufficiently tighten ones which should be good and tight.
Having had a few bad experiences in both directions, I finally got round to getting myself a torque wrench about 3 years ago. I went for a traditional beam-type one since they are relatively cheap and robust. I already had a socket set (probably one of the single most useful tool purchases I’ve ever made, especially for non-specific bike tools) so this, along with a handy chart of torque settings found in the back of my bike repair handbook, enabled me to get at least into the right ballpark with my torque settings. The downside of the beam-type wrench is that it can be quite difficult to accurately read the scale as you need to be able to look at it head on to avoid parallax errors; this is sometimes virtually impossible to achieve while you’re actually using it (or maybe it’s just my poor technique?). Even if you do manage to get it at a good angle, this particular wrench doesn’t have a particularly finely grained scale so the results are necessarily fairly approximate.
I therefore decided a few weeks ago to invest a little bit more in a click-type wrench. This is basically a ratchet driver which is set up so you can set it to a desired torque setting and it will “click out” when you reach that level of torque. They are somewhat more delicate than the beam-type, and may need occasional recalibration, but as long as it’s well looked after a click-type wrench should work well for a good long time. It certainly makes it much easier to achieve a specific torque setting as you can feel rather than having to see when you get there.
The main disadvantage of click-type wrenches is that they tend to have a relatively limited operating range of possible torque settings, and it’s just about impossible to find a single wrench that will cover all the settings needed on a typical bike. I decided to start by getting one that would do the low-torque settings (mine goes up to 24Nm) since I’ve usually found I’m more likely to overtighten than undertighten things and my beam wrench also seems to work a bit better for giving it quite a bit of welly (to use the technical term). At some point I may also get a click-type wrench to cover the higher torque range, but it’s not a very high priority at the moment.
When my new torque wrench arrived the other day, I was enthusiastic to start straight away on checking that all the various fittings on my bike (or at least the low-torque ones) were tightened to appropriate levels. This went well until I got to one of the bolts holding the brake arms on to the frame. The bolts for these particular brakes (which I put on as replacements for the original front brakes a couple of years ago) appear to be made of aluminium and I discovered that last time I took them off for maintenance I overtightened one of them to the point that the recess had started to deform and the hex key would no longer grip sufficiently to be able to undo it. Looking on the bright side, it’s better to discover the problem now rather than waiting until the brake had seized up and needed imminent maintenance while I was stranded on a roadside miles away from home.
My usual trick when faced with a screw or bolt with a damaged head that will no longer take its usual driver is to use a hacksaw to cut a slot so that I can attempt to use a flathead screwdriver on it instead. Sometimes this works and often it doesn’t (not to mention being a non-starter when the entire bolt head is recessed and you can’t get in to cut it. On this occasion I tried my usual trick and it failed.
Since the brake is a pretty important component to be able to keep in good working order, I didn’t really have the option of giving up on it. I didn’t fancy trying to drill the bolt out in the hope that I could somehow cut a new thread and save the frame to be able attach the brake again. Nor was I quite ready to admit defeat and take the wretched thing to the bike shop, so I used the time-honoured research method known as Google to explore alternative ways of fixing the problem.
This turned up two possible solutions I’d previously been unaware of. One is a little gizmo known as a screw extractor — basically a drill bit that you use to drill into the stuck screw in such a way that it basically unscrews itself. The other is a little bottle of stuff which isn’t quite glue but seems to have the effect of providing a better grip so that your tool can get enough purchase on the damaged screw to be able to turn it. There appear to be several brands, pretty much all of them of American origin, which may or may not be the same stuff under the different labels (it seemed to be pretty vague about what’s actually in it); the cheapest I could find was one called Screw Medic (costing about £3 for a small bottle, but it’s supposed to have a pretty unlimited shelf-life and only require a couple of drops per application, so it should last a fair while). This latter option seems a bit more straightforward to use than the screw extractor but only work on screws with fairly light damage, while the extractor should get pretty much any screw out.
Undecided as to which option to go for, impatient to wait and try one before ordering the other if the first didn’t work, and figuring that knackered screwheads seem to crop up fairly often (perhaps due to my previous lack of care and attention to appropriate torque levels — or making sure I’m not using a Pozidriv screwdriver with Phillips screws or vice versa), I decided to order both. The Screw Medic was the first to arrive and was awaiting me when I got home from work this evening. I’m delighted to say that it worked wonderfully and I was easily able to unscrew the damaged bolt and replace it with the one that I’d saved from the old brake (evidently a steel bolt and much sturdier than the other, though I still took care to tighten it carefully to only the required 6Nm with my new torque wrench).
So when the screw extractor set (there are actually 4 or 5 different bits for different sizes of screw) arrives, hopefully in the next few days, it may be a while before I need to use it. And if I make good use of my torque wrench (and my Philips and Pozidriv screwdrivers) I may never need to use it. Which would be fine by me.
Posted by Magnus on 2016/03/21
It is sometimes said that the devil is in the detail, usually when something that seems on the face of it to be simple turns out to contain some hidden complexity.
According to Wikipedia this actually derives from an earlier saying – God is in the detail – which indicates that details are important and whatever you do should be done thoroughly.
Sometimes, however, I think that it is delight that awaits in the details, especially if it’s in a work of art (in the broadest sense of the term) that you are contemplating.
This is one of his albums that I got relatively recently and I am therefore less familiar with it than with his first two albums, which I’ve had for somewhat longer. Still, I have listened to it at least half a dozen times in the last couple of years. Tonight, though, I heard (or at least noticed) for the first time a particular line in the song Summertime (nothing to do with the Gershwin classic of that name) that rather tickled my fancy:
“All the young people on their field telephones, updating their stati so they don’t feel alone”
The thing that I found delightful about this was the use of stati instead of the generally accepted statuses as the plural of status, clearly and deliberately playing on the Latin origin of the word (as stati is the nominative plural form in Latin, while in English it gets the standard plural treatment). Not, I admit, a particularly earth-shattering detail but quite amusing to me and a nice example of how you can pick up on little details of things long after you become basically familiar with them.
I wonder what other delights await me on further acquaintance with the works of Mr. B. (As a partial answer, while I was finishing this post, another delightful phrase cropped up in one of the songs on the same album: “Butter my muffin” — an expression of surprise that I think will have to adopt into my own idiolect.)
Posted by Magnus on 2016/01/14
Over the last few years I’ve been greatly blessed to have a more or less regular annual bulk supply of apples.
At first, it was because I lived in a house with two apple trees in the garden. The landlords were very happy for my housemates and I to avail ourselves of the crops and since I seemed to be the only one to do so I had more than enough apples for my culinary needs each autumn.
I moved out of that house quite a few years ago now (about 8, I think) but since then I’ve had a couple of friends with apple trees and each year one or both of them give me a nice lot of apples to use.
Originally I mostly used these apples for cider but in more recent years I’ve tended to use more of them for cooking than brewing. In the past this has usually amounted to lots of apple crumbles supplemented by occasional batches of stewed apple (and in one case when I was feeling adventurous, apple butter) or zapped apples (a microwaved treat that is both deliciously simple and simply delicious), with one or two apples lobbed into stews now and then.
A few days ago I received this year’s (or technically last year’s) batch of apples from one of my friends and I’ve decided to expand my repertoire a bit. Doubtless there will be a few apple crumbles and zapped apples to come (not to mention apples in stews, and perhaps a batch of cider) but I want to do a few other things as well.
As it happens, I’ve just been getting into another bout of slavophilia, prompted by finally getting round to listening to the CD of Eugene Onegin that I bought several months ago and aided by the fact that the Russian lessons on Duolingo have finally gone live, which gives me a good chance to revive my rather rusty Russian language skills. One result of this is that I’ve had my Russian cookery books out (the one by Kira Petrovskaya that I blogged about shortly after getting it several years ago and one called The Food and Cooking of Russia by Lesley Chamberlain that I got shortly afterwards. Both of these contain several recipes involving apples quite prominently.
This evening I have been trying my first couple of Russian apple recipes, one from each book.
Chamberlain supplied an intriguing recipe for Carrot and apple vzvar. She didn’t seem to explain what a vzvar (or взвар as it would appear in Cyrillic) is, but this one amounted to gently simmering carrots and apple in a minimal amount of water (after lightly sautéeing them in butter). Interestingly, all the Google hits I’ve been able to find for vzvar seem to indicate a kind of beverage, which is certainly not how this recipe turned out or, as far as I can see, how it was intended. Perhaps because of the limited amount of water used, I accidentally burned the carrots a bit but it actually gave quite a nice caramelised effect; there was no mention of this in the recipe, so I assume it’s not how it’s supposed to turn out but it certainly wasn’t the major culinary disaster I first feared.
Petrovskaya’s book furnished a recipe for an apple soup. The idea of cold fruit soups is not new to me, as I came across them on a visit to Hungary and I’m sure I’ve previously seen this recipe (and an equally delicious looking one for cherry soup – all I need now is a friend with a cherry tree) on reading this book, but I’ve never tried to make one. Again, it’s a pretty simple recipe. Basically you chop up a load of apples, simmer them with a bit of sugar and a few cloves in plenty of water until they are nice and soft, then mix in a bit of vanilla extract, leave to go cold and serve. At the moment I’m still waiting for it to go cold, but the taste I’ve had of the still-warm soup is promising.
I’ll probably be returning to Chamberlain’s book this weekend to try a dish of stewed cabbage and apples and there are plenty more apple-based recipes in both books to check out.
Of course, I’m not restricting my Russian cookery explorations to things involving apples (any more than I’m intending to restrict my apple cookery to recipes from Russia). Indeed, one of the other things I’ve been doing in the kitchen this evening is to get another batch of перцовка (pertsovka – (chilli) pepper vodka) going. In case you’re wondering what that’s all about, I wrote about pertsovka in my previous post about Petrovskaya’s book (linked above), although she doesn’t mention it (Chamberlain does, but I didn’t get her book until after that). I wrote that post shortly after my first and, up to now, only previous – and rather successful, if I say so myself – attempt to make pertsovka and I look forward in a few days time to finding out whether my second batch is as good as the first.
Perhaps I should next have a go at making apple vodka!
Posted by Magnus on 2016/01/13
Happy New Year!
I don’t usually bother making new year’s resolutions but I do sometimes like to set myself a few informal goals for the coming year. Last year, I had a few opera-related goals. One was to see a live opera, which I didn’t manage to achieve, although I’m more likely to manage it now that our local theatre has reopened (as of December) and is promising occasional operas amongst its programme. Another was to start exploring the Russian opera repertoire (the source of my first two encounters with live opera back in the early 1990s) — I succeeded in revisiting both of the Russian operas I’d seen live: Tchaikovsky’s Queen of Spades and Prokofiev’s Love of Three Oranges; I also listened to Eugene Onegin (another Tchaikovsky work and possibly the most popular Russian opera in the world) and I look forward to watching it on DVD soon (along with Mussorgsky’s Boris Godunov, another of the “great” Russian operas).
My big goal, though, was to properly acquaint myself with Richard Wagner’s Ring cycle. This is a story (based on Teutonic mythology) spread out over four operas, lasting a grand total of about 15 hours, so it’s not for the faint-hearted. Indeed, Wagner’s music, and the Ring cycle in particular, seems to be one of those love-it-or-hate-it kind of things, sort of the Marmite of the music world (apologies to any non-British readers who quite possibly have no idea what I mean by that reference, though the Wikipedia link should help you).
Previously, I had been familiar with the Ride of the Valkyries, which is probably known to just about everybody in the Western world although most (myself included, until very recently) would likely not be able to tell you that it is the music which opens Act 3 of Die Walküre (the second opera in the cycle – the English translation of the name is “The Valkyries”, so it’s probably not too surprising that it’s in this one) or that the main theme from it crops up again quite a few other times within the cycle (in fact, as far as I could spot, it first appeared at the start of Act 2 of the same opera, though in a less developed form) and a couple of years ago (before I started to get properly into opera) I got a CD of orchestral music by Wagner which turned out to consist of preludes and other instrumental sections from his operas (apparently he composed very little else).
When I started to explore opera, I got a couple of compilation albums (one with a book attached). One of these included the Immolation Scene from the end of Götterdämerung (the final opera in the cycle; actually, this scene is the very last one of the whole cycle). I enjoyed this (and the instrumental stuff from my earlier CD) enough to want to listen to more.
Round about November 2014, I got a DVD of highlights of the Ring, purporting to tell the essential story through extracts from the operas, leaving out much of the padding (of which there is a lot in the Ring cycle – albeit largely set to wonderful music) and bringing the runtime down from about 15 hours to a much more manageable 100 minutes. These extracts were taken from a cycle staged by a Spanish group called La Fura dels Baus, with lots of exciting stage lighting and acrobatics to complement the music. I rather enjoyed watching this and it led to my decision, when considering operatic goals for 2015, to aim to see or hear the whole cycle.
I acquired my first (and so far only) complete Ring cycle on DVD last January, as I managed to find a well-acclaimed one (the Barenboim-Kupfer one from Bayreuth, c. 1992) going for a very reasonable price (about £15, which works out at £1/hour). Before plunging into this, though, I picked up a couple of CDs of highlights, one conducted by Herbert von Karajan and the other by George Solti (both, I gather, did multiple Ring cycle recordings and I don’t recall which ones I’ve got – basically whichever had highlight albums available nice and cheap). I also had a look at a couple of Wagner’s other operas – Der Fliegende Holländer (aka the Flying Dutchman, suitable for my growing interest in sailing and things maritime last year, not to mention a fairly manageable 2 hours or so; I have watched a DVD version and listened to an audio one) and Tristan und Isolde (a 4+ hour mammoth, but at least there’s only one opera to sit through; this one I’ve only listened to so far, though at least one Wagner-specialist music critic describes this as “the ideal gramophone opera” in any case).
Though I was now feeling ready to tackle the full Ring cycle, I decided that I wanted to watch the operas, at least for the first time, together in one block rather than spread out across several weekends. The first opportunity to do so didn’t come until this week, when I was able to make use of a few days off work between Christmas and the new year to watch the operas on consecutive days, starting on Tuesday 29th December. In fact, I ended up starting Götterdämerung a bit later than intended last night and, as it’s quite long and I was falling asleep (because I’d been out late at a New Year’s party the previous night, not because the music’s boring) I decided to postpone the final scene (the aforementioned Immolation Scene) until this morning so that I could better appreciate it.
Watching the Ring cycle was, in some ways, quite different from most other operas, but I found it a very enjoyable experience and one I’d like to repeat (though next time I probably won’t be so concerned about watching all the operas so close together). If I get a chance to snap up any other versions of the Ring at sensible prices I may well do so (e.g. a more traditionally staged one, or perhaps the complete version of the Fura dels Baus one I mentioned earlier, which is even less traditional than the Kupfer-Barenboim one), though I’ll also be happy to enjoy this version again (and perhaps one or two audio recordings too). And I’d love to experience a live performance of the Ring cycle, in the unlikely event that I ever get a chance to do so.
I mentioned that the Ring is a bit like operatic Marmite. In a sense I think this is quite an appropriate simile, not least because both are supposed to be things you either love or hate but in both cases I find myself somewhat towards the love end of the spectrum but not absolutely wild about it. There will be times when Wagner is just the thing I want to listen to, and other times when I’m more in a mood for, say, Rossini, just like there are times when I want marmite on my toast and other times when I want marmalade (perhaps made with Seville oranges).
Posted by Magnus on 2016/01/02
However, a post that appeared there the other day is such a peach of a short story that I couldn’t refrain from bringing it to your attention. It is, as befits the nature of that blog, quite mathematical in character (and, more specifically, about differential calculus – though it doesn’t really go into the gory details) so if that sort of thing scares you too much, feel free to run away and hide behind the sofa until my next post (which almost certainly will be about something completely different).
Assuming you’re still here, the story is called The Differentiation: A Survivor’s Tale and is, uniquely among all the mathematical fiction I have ever read (which is a fair amount, over the years), told from the perspective of the exponential function. The whole thing is firmly based on the behaviour of different classes of functions under the operation of differentiation and I suspect it would be fairly incomprehensible to anyone without a reasonable grounding in calculus, though it could be quite a useful way of helping to remember the general principles, without getting bogged down in the technical details, for somebody who is just learning the subject. Given the pedagogical nature of the blog as a whole, I suspect that may have been at least partially the author’s intent.
The story also has a nice twist in the tail that makes it almost work as a social commentary on something or other (though I can’t say more without spoiling the punchline for anyone with sufficient mathematical background to follow the story in the first place).
Perhaps the best categorisation of it is as a mathematical horror story, which is one of the ways it’s been tagged on the original blog. That works on at least two levels as for the mathematically inclined it is quite a chilling tale and for anyone else the very fact that it is mathematical is probably sufficient to induce a cold sweat.
Anyway, I should probably refrain from further analysis and let the story speak for itself, to those who have ears to hear.
(And, yes, there was a stealth pun in that last sentence, since differential calculus is one of the major subdivisions of the branch of mathematics known as real analysis.)
Posted by Magnus on 2015/10/31
Since my visit to Catalonia last August, I have been working quite a bit, if not entirely steadily, on my Spanish, and also having a go at learning some Catalan.
I will shortly be going out there again for another visit, so it will be a good opportunity to assess how much I’ve learned in the past 14 months. My feeling is that it will turn out to be quite a lot, though there’s still much more to learn of both languages.
When I first started trying to learn Spanish, just over 20 years ago, it was from a book entitled (rather optimistically) Spanish in Three Months. Suffice it to say that it took me somewhat more than 3 months to get through the book – in fact, I didn’t get round to systematically working through all the chapters until some time after my last visit to Spain. I don’t suppose many people would buy a book called Spanish in Twenty Years and, to be fair, I don’t think the author or publishers can be blamed for the amount of time it took me to finish the book. In fact, I’ve used quite a few different resources in my quest to learn Spanish and in many respects this book is probably one of my favourites (though I think that any study of something as complex as a language really needs to make use of multiple sources of information).
After getting back from Catalonia last year, I initially decided that I would concentrate on improving my Spanish for several months, if not years, before taking more than a cursory look at Catalan, but I quickly acquired several Catalan books so that I’d be prepared when the time came. One of these was Catalan in Three Months, a sister to my first Spanish book. Several times over the last year I have dipped into this book but about a month ago I decided to systematically work through it (tackling the exercises and writing down vocabulary, etc.) and this time I was able to reach the end within about a fortnight. Admittedly, it’s a slightly shorter book than the other one (or at least breaks its material into fewer chapters) and I was going at a slightly too fast pace in order to get a broad overview of the language, so I haven’t fully assimilated a lot of the grammar or vocabulary (though the same can be said of Spanish, which I’ve been working at for a lot longer).
The fact that I already knew a reasonable amount of Spanish also helped me to work through the Catalan book much more quickly as, while there are many significant differences between the two languages, there is also a lot of overlap so I had a big headstart in terms of getting to grips with the basic nuts and bolts of the language. Having a reasonable, if rather rusty, command of French helped quite a bit too, since Catalan falls somewhere between French and Spanish linguistically as well as geographically.
As I was approaching the end of Catalan in Three Months, I had a look round to see what other Catalan resources were available and I came across one in the Dummies series of books that I’ve previously found useful for getting a handle on things ranging from knitting to quantum mechanics. The twist here was that the book was written in Spanish, and there doesn’t seem to be an English version available. Still, I reasoned that this might be quite a good way of consolidating my grasp on Spanish as well as learning a bit more Catalan (and, significantly, some more about the culture, which was rather lacking in the other book), so I purchased myself an e-book version of Catalán Para Dummies and have gradually been working my way through it.
Amongst the things I’ve learned from studying this book are the following two gems that I wanted to make a note of:
Firstly, the Catalan word for a pestle (as in pestle & mortar) is, apparently, la mà de morter, which means “the hand of the mortar”. Apart from being quite poetic, I find this useful because I’ve always had trouble remembering which one is the pestle and which one is the mortar. Somehow I find the idea of thinking of the pestle as the hand of the mortar seems to make it easier to remember that it is the one shaped roughly like a small club (or perhaps an arm with a fist on the end of it), while the mortar is the bowl shaped bit. Incidentally, I gather that the Spanish is similar (el mortero for mortar and la mano for pestle, although both Spanish and Catalan seem to have at least one other word – el pilón / el piló respectively – for the latter).
Secondly, there is a lovely Catalan idiom – fer dissabte (literally, “to make/do Saturday”) – which essentially refers to pottering round the house, doing cleaning and such other tasks as are often done on Saturdays but may equally be done at other times when you’re at home rather than out at work. Another source I found (also in Spanish – I’ve not yet managed to track down any in English) to explain this phrase seems to suggest that it’s more about an intensive cleaning session rather than pottering around. In either case, it’s based around the home and not necessarily confined to Saturday. A literal translation into Spanish would be hacer sábado but this would, apparently, make as much sense as “to do Saturday” in English, so it is a Catalan-only idiom (but it joins the likes of the German word ausschlafen – literally “to sleep out” but meaning to sleep until you wake up naturally, rather than using an alarm – on my list of words or phrases that we really ought to adopt into English).
Posted by Magnus on 2015/10/28