Sunday, November 22, 2009

a fox !!

i was randomly watching though the window on this rainy day of november when i saw this...

I would be happy to feel as confortable walking on the edge of the wall like the fox does :) but unlike the animal, i would put my family jewels in danger ... :S

bye bye

Friday, November 20, 2009

crystallography resolution (in Angstroems)

Some rules of thumb for 'outsiders'

Resolution Meaning:
>4.0 Coordinates meaningless
3.0 - 4.0 Fold possibly correct, but errors are
very likely. Many sidechains placed
with wrong rotamer.
2.5 - 3.0 Fold likely correct except that some surface
loops might be mismodelled. Several long, thin
sidechains (lys, glu, gln, etc) and small
sidechains (ser, val, thr, etc) likely to
have wrong rotamers.
2.0 - 2.5 As 2.5 - 3.0, but number of sidechains in
wrong rotamer is considerably less. Many
small errors can normally be detected.
Fold normally correct and number of errors
in surface loops is small.
1.5 - 2.0 Few residues have wrong rotamer. Many
small errors can normally be detected.
Fold always correct, also in surface loops.
0.5 - 1.5 One must be a determined idiot to screw
things up at this resolution, but don't
be fooled, even at this resolution can
we find threonines with the wrong chrirality
on the C-beta. But in general, structures
have only some small errors at this

i can see that my 0.9A structure contrains me to be as awaken as possible to avoid to get the "determined idiot"
nickname ....

Tuesday, November 17, 2009

Elmo's seat - or the torture seat of elmo aaaaahhhhh

Test of the sinusoidal signal generated with LABVIEW for the K8055 and servo adapter (see older post). the motions of both the servo follows the signal to 7-8 sinus cycles by second, beyond that frequency, the servos are attenuating the amplitude of the signal because it is not fast enough. (HITEC cheap servos tested here). the card actually follows the computer signal +/- untill approx. 20-25Hz as observed by the flashes of the output leds.

for later:
control of the k8055 card and of the seat by simulator game ( xsim ).

Sunday, November 01, 2009

another of these things that should never break: the cover of the car's fuel tank pipe

all cracked and broken cover:

shiny & fixed cover! amazing what you can fix with a warm iron!

Note i would not be too worried about it unless it would not have been a problem in case it closes badly and forbids the proper locking of the muscle car :D