<DOC>
<DOCNO>
586
</DOCNO>
<TITLE>
an approximate treatment of unsteady heat conduction
in semi-infinite solids with variable thermal properties .
</TITLE>
<AUTHOR>
yang,k.t. and szewczyk,a.
</AUTHOR>
<BIBLIO>
j. heat trans. asme trans. 81, 1959, 251.
</BIBLIO>
<TEXT>
  this very short paper presents an approximate procedure for the
calculation of unsteady heat conduction in semi-infinite solids
with variable thermal properties .  it is claimed to be an improvement
over previous efforts in this area since it yields physically
sensible results for cases where thermal properties have a large
dependence on temperature .  instead of using polynomials to represent
an unsteady temperature profile an exponential form is used .
good agreement is shown for several cases where the method of
the paper is compared with exact solutions .
</TEXT>
</DOC>
