Dear All,
The other day, while developing a pulse program I had a
problem, solved it (after some head scratching), and then
began to wonder if Murphy also does NMR.
I set a homospoil gradient pulse to clean up unwanted
transverse magnetization, and it re-focused magnetization
previously dephased by an excitation-sculpting selective
combo!
Just as programmers may blame 'bugs' for their software
errors, so others blame Murphy for their design lapses.
Blaming Murphy may just be more reasonable :-) (see below)
For those not familiar with Murphy, he is supposed to be
responsible for various sets of "Laws" which may be
summarized in one over-arching Law.
"If anything can happen, it will, and at the most inconvenient
time and in the most system compromising manner"
>From this follows (by Murphy) that if toast falls from a table it
lands butter-side down. Interestingly Mad Labs (National
Geographic Channel from the UK) recently did some statistical
research using quite a large number of slices of toast, and
found this law to be substantially valid. Most of the toast (over
80 %) flipped while falling. They doubled the height of a
standard table, repeated their experiment, and the majority
(over 80 %) of the toast-slices landed butter-side up.
One of his Electrical Engineering classics is that:
You add a fuse to protect a circuit. The circuit then blows and
protects the fuse.
Ignore Murphy at your peril!
Sincerely,
Andy Soper
Rhodes University
NMR Facility
South Africa.
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Sed ex amante alio accenditur alius. St Augustine.
One loving spirit sets another on fire.
Andy Soper (*NEW* Contact Details) Email: a.soper_at_ru.ac.za
Telephone: National +27: Area (0)46
Office: 603 8717: Fax: 622 5109: Home 622 6315
Mobile: (0)82 56 27037 Amateur Radio: ZS2 VJZ
Received on Wed Apr 02 2008 - 00:17:55 MST