def KLfamily(nm, lnom, lsym, lm, lme, lrate,
mnom, mm, mme, pnom, pm, pme,
mev=mega*eV.mass, Hz=Hertz):
"""Deciphering Kaye&Laby p449.
Positional arguments are as follows:
neutrino mass -- upper bound, measured in MeV
lepton name -- string
lepton symbol -- string
lepton mass -- in MeV
lepton mass error -- half-width of error bar on previous
lepton decay rate -- fraction of the given lepton species which decay per second
-ve quark name -- name of the quark with -ve charge e/3
-ve quark mass -- mass estimate, in GeV, for the -ve quark
-ve quark mass error -- half-width of error-bar on previous
+ve quark name -- name of the quark with +ve charge 2*e/3
+ve quark mass -- mass estimate, in GeV, for the +ve quark
+ve quark mass error -- half-width of error bar on previous\n"""
return Family(Neutrino(lnom, mass=Quantity.below(nm, mev)),
Lepton(lnom, mass=Quantity.within(lm, lme, mev), symbol=lsym,
decay=lrate * Hz),
dQuark(mnom, mass=Quantity.within(mm, mme, kilo*mev)),
uQuark(pnom, mass=Quantity.within(pm, pme, kilo*mev)))
def KLfamily(nm,
lnom,
lsym,
lm,
lme,
lrate,
mnom,
mm,
mme,
pnom,
pm,
pme,
mev=mega * eV.mass,
Hz=Hertz):
"""Deciphering Kaye&Laby p449.
Positional arguments are as follows:
neutrino mass -- upper bound, measured in MeV
lepton name -- string
lepton symbol -- string
lepton mass -- in MeV
lepton mass error -- half-width of error bar on previous
lepton decay rate -- fraction of the given lepton species which decay per second
-ve quark name -- name of the quark with -ve charge e/3
-ve quark mass -- mass estimate, in GeV, for the -ve quark
-ve quark mass error -- half-width of error-bar on previous
+ve quark name -- name of the quark with +ve charge 2*e/3
+ve quark mass -- mass estimate, in GeV, for the +ve quark
+ve quark mass error -- half-width of error bar on previous\n"""
return Family(
Neutrino(lnom, mass=Quantity.below(nm, mev)),
Lepton(lnom,
mass=Quantity.within(lm, lme, mev),
symbol=lsym,
decay=lrate * Hz),
dQuark(mnom, mass=Quantity.within(mm, mme, kilo * mev)),
uQuark(pnom, mass=Quantity.within(pm, pme, kilo * mev)))
See study.LICENSE for copyright and license information.
"""
from study.value.quantity import Quantity
quid = Quantity.base_unit(
'£', 'Pound Sterling', """The base unit of British currency.
Used to be 20 shillings (21 shillings made a Guinea); each shilling was 12
pence, each penny was four farthings. A florin was two shillings; a crown was
five. Apparently a pound was also called a sovereign. HTML supports character
entity &sterling; for the Pound Sterling.
To properly handle money within a system of units, I need support for variation
in time and space (conversion factors between different currencies vary with
time; and you'll get different exchange rates from different trading partners).
Then again, conversion factors between systems of units also show similar
variation - contrast the different nations' archaic units of length, and notice
how units of volume got re-defined by assorted legislative acts over the years.
""")
# It's clearly inadequate to treat money units as approximate multiples of one
# another: each is an exact unit in its place, it's only the conversion between
# them that's approximate.
krone = quid / Quantity.within(10, 2)
del Quantity
from debt import Debt, Mortgage
from job import Job
from study.value.quantity import Quantity
quid = Quantity.base_unit(
"£",
"Pound Sterling",
"""The base unit of British currency.
Used to be 20 shillings (21 shillings made a Guinea); each shilling was 12
pence, each penny was four farthings. A florin was two shillings; a crown was
five. Apparently a pound was also called a sovereign. HTML supports character
entity &sterling; for the Pound Sterling.
To properly handle money within a system of units, I need support for variation
in time and space (conversion factors between different currencies vary with
time; and you'll get different exchange rates from different trading partners).
Then again, conversion factors between systems of units also show similar
variation - contrast the different nations' archaic units of length, and notice
how units of volume got re-defined by assorted legislative acts over the years.
""",
)
# It's clearly inadequate to treat money units as approximate multiples of one
# another: each is an exact unit in its place, it's only the conversion between
# them that's approximate.
krone = quid / Quantity.within(10, 2)
del Quantity
from debt import Debt, Mortgage
from job import Job
violet=photon(380, 420, 'violet')) # purple
del photon
visible.also(spectrum=(visible.red, visible.orange, visible.yellow,
visible.green, visible.cyan, visible.blue,
visible.indigo, visible.violet),
rainbow=Quantity.within(
138.7, .7, arc.degree,
"""The angle through which a rainbow turns visible light.
This varies with the colour of the light, red being turned least and blue most.
Since the angle exceeds a quarter turn, the arc of a (pure water) rainbow
appears centred on the direction opposite to the light source (generally the
sun), at an angle ranging from 40.6 (violet) to 42 (red) degrees from that
direction. The spray-bow resulting from sea-spray is tighter - sea water
droplets turn light through a larger angle than pure water droplets.
""",
secondary=between(
127, 130, arc.degree,
"""The angle through which a secondary rainbow turns visible light.
Compare visible.rainbow, the primary angle: for the secondary rainbow, red (130
degrees) is turned more than violet (127 degrees); since this range is less than
that of the primary rainbow (but still more than a quarter turn), the secondary
bow appears outside the primary.
""")))
radio = Photon(name="radio", frequency = Quantity.below(3, giga * Hertz))
microwave = Photon(name="microwave",
wavelength = between(1, 100, milli * metre),
frequency = between(1, 100, 3 * giga * Hertz))
infrared = Photon(name="infra-red",
del photon
visible.also(
spectrum=(visible.red, visible.orange, visible.yellow, visible.green,
visible.cyan, visible.blue, visible.indigo, visible.violet),
rainbow=Quantity.within(
138.7,
.7,
arc.degree,
"""The angle through which a rainbow turns visible light.
This varies with the colour of the light, red being turned least and blue most.
Since the angle exceeds a quarter turn, the arc of a (pure water) rainbow
appears centred on the direction opposite to the light source (generally the
sun), at an angle ranging from 40.6 (violet) to 42 (red) degrees from that
direction. The spray-bow resulting from sea-spray is tighter - sea water
droplets turn light through a larger angle than pure water droplets.
""",
secondary=between(
127, 130, arc.degree,
"""The angle through which a secondary rainbow turns visible light.
Compare visible.rainbow, the primary angle: for the secondary rainbow, red (130
degrees) is turned more than violet (127 degrees); since this range is less than
that of the primary rainbow (but still more than a quarter turn), the secondary
bow appears outside the primary.
""")))
radio = Photon(name="radio", frequency=Quantity.below(3, giga * Hertz))
microwave = Photon(name="microwave",
wavelength=between(1, 100, milli * metre),
frequency=between(1, 100, 3 * giga * Hertz))
