By measuring magnetoresistance and Hall effect in classically moderate perpendicular magnetic field in Si-MOSFET-type macroscopic antidot array we found a novel effect: nonlinear with field, temperature-and density-dependent Hall resistivity. We discuss qualitative explanation of the phenomenon and suggest that it might originate from strong temperature dependence of the resistivity and mobility in the shells of the antidots.

Autonomous wireless sensors for the temperature and humidity in the premises for storing vegetables allow you to create automatic systems to maintain the storage conditions of these products, which is necessary for their proper long-term preservation. This article proposes a system for wireless monitoring of temperature and humidity, which reduces the costs of laying and operating cable sensors in the infrastructure of fruit and vegetable stores, and monitors temperature and humidity at different levels of the embankment of fruits or containers. A feature of the proposed automation technology is the ability to measure temperature / humidity in hard-to-reach places, for example, in ducts or, which is especially important, in the depths of a mound of potatoes, where it is almost impossible to monitor the processes of formation of rotting foci.

Experimental results are presented on via-hole etching in a thick (100 pm) film of polyethylene terephthalate (PET) with the help of a copper vapour laser (wavelength A=510 nm, pulse duration 10 ns, repetition rate 8 kHz). The rate of via-hole formation is as high as 100 pms-'. The effective coupling of the polymer film to the laser radiation is due to the formation of highly absorbing graphitised regions in the bulk of the film, which is initially transparent at the laser wavelength. The side walls of the hole can be metallised by simultaneous decomposition of a Pd(acac), spun-on layer as a precursor for subsequent electroless Ni deposition. The activation of the inner surface of the hole is achieved as a result of the precursor vapour entering the hole during laser etching. The metallised via-hole provides a good electrical interconnection of the two sides of the PET film.