Electronically tunable RC-active ladder filter transfer fun& tions ore realized by employing the four quadrant analogue multiplier os the basic nonlinear network element. All the frequency dependent branches of a conventional RC-active ladder structure realizations ore simulated by means of impedance scaling networks. The scaling of these impedances allows the cutoff frequency of an elliptic lo...

A widely electronically tunable picosecond Ti:sapphire laser is demonstrated without any mechanical rotation or movement for the first time. With the second harmonics of the Nd:YAG laser as a pump source, the laser produces 10 ps pulses with a maximum output power of 350 mW. The wavelength of the self-starting ultrashort laser pulses can be rapidly and arbitrarily accessed in the region from 76...

The e-commerce growth, the increasing role of social networks in promoting image and products enterprises, automation technological processes spread remote work around world lead to digitalization economic entities. purpose article is study peculiarities tourism enterprise creation an electronic way while minimizing founding organizational actions carried out person, traditional way. based on a...