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Author: lievenlb

squeezebox


This week I finished the first phase of my home-network plans : from
every computer one can stream iTunes-music files to be played in
the living room, and from every computer one can stream iPhoto or
iMovie-files to the TV-set. Both solutions involve new hardware
and as it usually is with hardware : there are elegant or clumsy
solutions. The photo-video solution is rather clumsy so I’ll postpone
it until later. The audio-solution on the other hand is extremely
elegant : I bought a squeezebox from slimdevices.
It is extremely small (22cmx5cmx12cm) so you can place it virtually
everywhere, it can be connected to your network either wireless or by
ethernet and it has several alternatives to connect to your speakers or
hifi-set : a headphone mini-jack (which is at the moment what I use to
connect it to a pair of powered speakers) but I can always upgrade my
listening experience using : analog audio RCA, digital optical or
digital coax. The service it provides is excellent, all information is
available from their website (they do not ship a CD but you can download
the latest version of slimserver from the website (available for all
platforms)) and they have several forums among which a rather enthusiastic
users-forum (no surprise to me). You get it running in no time. First
download slimserver and install it on the machine(s) containing music
you want to stream over the network. What it does is to add one extra
item to your SystemPreferences and clicking it you can start the
SlimServer. Then, power up the squeezebox and
follow the messages on the display. I choose to connect to a wireless
network, it then detects the names of the possible networks and asks you
to choose one, asks what type of encryption it uses (for Airport b take
64 bit, for g take 128 bit encryption). The most difficult part is to
type in the wireless password as it wants the hexadecimal
equivalent of your pass phrase. To find it, open up Airport Admin
Utility
, log in to the network you want and on the screen you get
look for the password icon, clicking it will give you the
hexadecimal WEP-key. If you are familiar with SMS you’ll find it easier
than me to type this in to the squeezebox
(use the number keys to simulate a keyboard). After this it will connect
to your network and get the IP-address of the SlimServer (the computer
on which you started the server) and you have access to its
iTunes-library. Two caveats : make sure you use the MP3-option to
get CD’s into iTunes (the default setting of Preferences/import
is AAC not MP3 (btw. slimdevices now claim that you may also use
AAC-files, I didn’t check this out yet but have no doubts it will
work). The second is that the display screen is rather small to browse
the library if you are used to iTunes’ window. A neat way around it is
to use a webbrowser on ANY computer in your network (for example the
iBook on your lap). Just fire up Safari and go to the
Rendezvous-window (it took me some time to figure out what they
meant by it : in Safari go to the Bookmarks pulldown menu, then
choose Show all bookmarks and on this page you will find a
Rendezvous-tab, click it and one of the bookmarks will be
SlimServer and by clicking on it you have web-access to control
your squeezebox. Very neat, this Rendezvous
awareness and a sharp contrast to the clumsy photo-video solution. So,
if you want to free your music and hear it via hifi-standards rather
than via computer-soundcards go and buy as many squeezebox sets as you will need to fill your house with
music!

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writing

A long
time ago Don Passman
told me the simple “secret” for writing books : “Get up and,
before you do anything else, try to write 2 or 3 pages. If you do this
every day, by the end of the year you’ll have a pretty thick book.”

Probably the best advice ever for those who need to get a thesis or book
finished. I’ve managed to live by this rule for several months in a
row (the first half of 2000 leading to version 2 and the winter of 2001-2002
resulting in version 3) and I can recommend it to
anyone in need for some (self)dicipline. It feels just like training,
hard in the beginning but after a couple of weeks you’re addicted.
Also the pitfalls are similar. On certain days you have so much energy
that it is easy to write 10 or more pages (or in the revision process,
to revise 30 or more pages). Don’t do it! Tomorrow you will be
exhausted and you will not be able to do a single page but you will
convince yourself that it is not needed as you did more than enough the
day before. And you’ll feel and say the same thing the day after, and
the next day! and before you realize it you’ll be way behind
schedule. So, rule 1 : do 2 pages mimimun, 3 or 4 if possible but never
more than 5!

Another useful bit of advice comes from
Lewis Caroll’s ‘Through the looking glass’
in which the Red
King says

Start at the beginning, then continue until
you reach the end. Then stop.

Too many bookprojects
never get past the planning stages. It is much more fun to dream up the
perfect book than it is to write the first paragraph. Also, when the
writing on chapter X goes slow, it is tempting to begin with chapter X+1
or any other chapter that seems like more fun, and before you know
you’ll end up with a complete mess (and believe me, I know what I’m
talking about here).

Armed with these two guiding rules I began
the new year writing version pi of my book. (Oh, a marginal note : some
people seem to think that I set up ‘NeverEndingBooks’ to get my
book published. It may surely be the case that I’ll get _a_
book published there, but _the_ book I promised already a long
time ago to the EMS-publishing
house
! So, if you have an interesting bookproject for
‘NeverEndingBooks’ please contact us.) Anyway, the writing goes
slow! I’m already far behind schedule. So far I produced just over 20
pages! Part of the problem is that I want the book to be self-contained
and from past experiences with our ‘masterclass non-commutative
geometry’ I know that this means including a lot of elementary
material (it seems that sudents are eager on entering a masterclass on
non-commutative geometry without knowing the basics of either
non-commutative algebra or algebraic geometry). So. I started out with
believe it or not the definition of matrix-multiplication! But the book
has a pretty steap learning curve, by page 3 I’m already using
Grassmannians to classify left ideals in matrix-algebras! But I was
surprised how long it took me to come up with my own proofs of all this
‘trivial’ material. But the main problem is : lack of motivation.
I’m no longer convinced that one has to write technical books to aid
the younger generation. They are already far too technical!Perhaps it
would be far better to write books helping to develop creativity? But
how? And why are there so few of such books around. In fact, I know of
only one book trying to achieve this : An Invitation to General
Algebra and Universal Constructions
By George Bergman. His chapter 0
‘about the course and these notes’ comes very close to how I would
like to teach masterclass courses or how I’d love to write books if
only I’d know how. Perhaps, over the next couple of weeks, I’ll use
this weblog again to write up a micro-course on noncommutative geometry,
some people tell me they begin to miss the mathematics on this
site.

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design contest 2

The first entries for the desing contest are in. The one above I
dubbed mirror1. The original deadline has been extended
to february 14th. Afterwards readers of this site will be able to vote
online for the winning concept. More details can be found in this post.
Here is another one, tile1.

I will replace the old header image by new entries to test how they
fit in.

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