def between(lo, hi, units, *args, **what):
return Quantity.flat(lo, hi, None, units, *args, **what)
This isn't the right way to wrap it, but if any wrapping's to be done, it
should be done here, not by bodging Radiator's __init__ method !\n"""
try:
if temperature > 0: T = temperature * Kelvin
else: T = Centigrade(temperature)
except TypeError: # temperature has units, so > 0 check bombed.
if temperature / Kelvin > 0: T = temperature # TypeError if wrong units
else: T = temperature + Centigrade(0)
if T / Kelvin < 0:
raise ValueError, 'Negative temperature, even after Centigrade coercion'
return Radiator(T, *args, **what)
from study.value.quantity import Quantity
Human = Radiator(Quantity.fromDecimal(309.5, 1, None, Kelvin),
oral=Centigrade(Quantity.gaussian(36.8, .5)),
axillary=Centigrade(Quantity.flat(36, 36.9, 36.6)),
__doc__="""Human body as a radiator.
The human body maintains a roughly constant temperature, so naturally radiates
as a body of that temperature, in so far as it's exposed. Skin temperature is
doubtless less than one would measure in an arm-pit (an 'axillary' measurement,
commonly used in Russia and Poland), which is about .2 K lower than oral
measurement (common in the anglophone world); which, in turn, is about .5 K
below anal measurements; while core temperatures are presumed to be higher yet
than this.
""")
del Quantity, Centigrade
IcePoint = water.temperature.freeze
milk = Substance(density=10.5 * pound / gallon)
air = Gas(
RMM=1.6 * Nitrogen.A + .4 * Oxygen.A, # close enough ...
sound=Object(speed=Quantity(mach)))
air.sound.speed.observe(331.36 * metre /
second) # duno where I got this one ...
methanol = Substance(density=.7918 * kilogramme / litre)
kerosene = Substance(density=.81715 * kilogramme / litre) # at Fahrenheith(60)
alcohol = ethanol = Substance(density=.789 * kilogramme / litre)
petrol = Substance(density=.73722 * kilogramme / litre)
# liquid hydrogen, at 20K: 70.99 gram / litre
granite = Substance(density=Quantity.flat(2.6, 2.7, units=kilogramme / litre),
strength=Object(compressive=175e6 * Newton / metre**2))
gneiss = Substance(density=Quantity.flat(2.6, 2.9, units=kilogramme / litre),
strength=Object(compressive=125e6 * Newton / metre**2))
quartz = Substance(density=2.65 * kilogramme / litre,
melt=1883 * Kelvin,
boil=2503 * Kelvin)
mixture_doc = """Modeling chemical mixtures.
The underlying model is the `atomist' model of molecular-scale thermodynamics.
A body of space (of volume V) contains a population of little objects; these
move about, may fall apart, especially when bouncing off one another, at which
moments they may likewise stick to one another.
def between(lo, hi, units, *args, **what):
return Quantity.flat(lo, hi, None, units, *args, **what)