Abstract: The invention concerns a cognitive training system (1) for providing a cognitive exercise. The cognitive training system comprises a head-mounted display (2) for providing a stereoscopic image (23) to a user (9). The system further comprises a controller (4) configured to control said head-mounted display (2) to provide the cognitive exercise by displaying virtual objects moving in a three-dimensional environment according to predetermined rules of motion, and by acquiring inputs provided by the user by means of an input unit (3). The cognitive training system (1) further comprises a perturbation unit (5) configured to control the head-mounted display (2) and/or the controller (4) to activate a virtual perturbation altering the appearance of the virtual objects. The perturbation unit determines the virtual perturbation based on a random or pseudorandom quantity.

Abstract: The invention concerns a cognitive training system (1) for providing a cognitive exercise. The cognitive training system comprises a head-mounted display (2) for providing a stereoscopic image (23) to a user (9). The system further comprises a controller (4) configured to control said head-mounted display (2) to provide the cognitive exercise by displaying virtual objects moving in a three-dimensional environment according to predetermined rules of motion, and by acquiring inputs provided by the user by means of an input unit (3).The cognitive training system (1) further comprises a perturbation unit (5) configured to control the head-mounted display (2) and/or the controller (4) to activate a virtual perturbation altering the appearance of the virtual objects. The perturbation unit determines the virtual perturbation based on a random or pseudorandom quantity.

Abstract: The present invention relates to a compound of the general formula (I) wherein R1 represents a group selected from the list consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, linear or branched, saturated or mono- or polyunsaturated aliphatic carbon chain containing from two to ten carbon atoms, phenyl, and phenylacetylen, and wherein R2 and R3 independently of each other represent a group selected from the list consisting of Cl, I, methyl, phenyl, or phenylacetylene.