Abstract: The optical memory has nanocrystals embedded in a matrix constituting memory elements to carry bits of information. Changes have been induced in the material with light to constitute information bits in the memory. These changes are changes in the vibrational modes of the nanocrystals and they are optically readable by spectroscopic devices as a result of one or more shifted phonon bands. The method of the invention for preparing such an optical memory is performed by changing the vibration mode of the embedded nanocrystals by light in order to shift one or more phonon bands. The changes constitute information bits which are readable by spectroscopy.

Abstract: A non-invasive portable apparatus for analyzing the performance of gas-filled window glazing units is disclosed. The operation of the apparatus is based on discharging the spacing between the panels (2a, 2b) of the window glazing unit (1) by applying rapidly alternating electrical field to the spacing between the panels of the window glazing unit, on collecting and analyzing the emitted discharge light in different structural intervals. The discharge is created by a needle-like electrode (5), and the inner conducting layer (2a) of the glazing unit serves as another electrode. The localization of the discharge in the vicinity of the end of the needle-like electrode (5) makes it possible to collect the emitted light without routine adjustment of the optical system.

Abstract: Traffic load in a congested cell in a mobile communication system is controlled by handovers into nearby cells which are less congested. Parametrisation and signalling are reduced based on integration of the functionality in one network element.