On the designing of effective calculation algorithm for shielded multiconductor transmission lines
For the purpouse of designing of effective and universal calculation algorithm of the shielded multiconductor transmission lines parameters existing now rigorous methods of boundary value problems solutions are considered. At low frequencies the most preferred is the method of discrete singularities. A calculation algorithm of electromagnetic fields and dispersion characteristics of shielded multiconductor transmission lines based on mode matching method and recalculation formulas is suggested.
Calculation algorithm for shielded microstrip-, slot-, and micro-coplanar strip lines with finite strip thickness
A common algorithm for the three types of transmission lines is based upon the modified Fourier method (re-expansion). To convert the summation equation system to algebraic form, the direct and inverse calculation formulas are used in contrast to the Galerkin method.
UV-B radiometry and dosimetry for solar measurements.
Biologically effective irradiance or dose of solar UV radiation was determined using a spectroradiometer, two broadband radiometers and two types of passive UV-dosimeters. The absolute erythema irradiance and the actinic irradiance were calculated from the solar spectrum measured with the spectroradiometer. It was demonstrated that the erythema irradiance is proportional to the actinic irradiance of solar radiation. The erythema irradiance was also determined using the two broadband radiometers which utilize a filter transmitting erythema spectra. Personal UV-dosimeters such as polysulphone and CR-39 were used to determine the erythema dose for a selected period of time. These results were used to estimate the accuracy of the broadband radiometers and UV-dosimeters. It was found that the results obtained from the broadband radiometers deviate from the absolute erythema irradiance by less than 20% during clear days between the hours of 11:00 and 13:00 Eastern Standard Time (EST) in Australia. The assessment of the erythema dose using passive dosimeters such as polysulphone and CR-39 could introduce an error as high as 40% if the calibration was not performed before undertaking experimental measurements.