New recurrence formulae for spherical Bessel's functions
New upper bounds on sphere packings. II.
Note on certain results in Bessel function
Notiz über die Dirichlet'schen Integralausdrücke für die Kugelfunction. Pn (cos ....) und über eine analoge Integralform für die Cylinderfunction J (x)
Numerical aspects of the identification of thermal characteristics using the hot-wire method
The hot-wire method, based on the recording of the temperature development in time in a testing sample, supplied by a probe with its own thermal source, is useful to evaluate the thermal conductivity of materials under extremal loads, in particular in refractory brickworks. The formulae in the technical standards come from the analytical solution of the non-stationary equation of heat conduction in cylindric (finally only polar) coordinates for a simplified formulation of boundary conditions, neglecting...