Abstract: The present invention relates to a method for determining a physiological condition of a person, comprising sampling a plurality of heart beats of the person, extracting a series of cardiac R-R intervals from the heart beat samples, and providing a two-dimensional representation of subsequent R-R intervals, wherein two subsequent R-R interval forms an entry in the two-dimensional representation, wherein the method further comprises the steps of determining a centroid, an average radius and an average rotation frequency for the plurality of entries in the two-dimensional representation, determining a plurality of distances between the radius and each of the entries in the two-dimensional representation, and determining the physiological condition of the person using the radius in combination with the plurality of distances.

Abstract: A method and system for reducing stress in a working environment. In a conditioning phase a positive association of a sensory stimulus, such as a scent, image and/or sound with a relaxed feeling is created. Following the creation of this positive association the “relaxing” stimulus will be used as a de-stressor in the usage phase. That is, when it is detected that the user is stressed (80,90), the “relaxing” stimulus is released (100) to reduce stress.

Abstract: According to the method and system described the usage of keyboard and mouse by a computer user is analyzed (20). Based thereon, it may be proposed to the user to take a break and to do a small mental game, puzzle, or brain exercise (50). This may help reduce stress, to relax, to increase concentration, to reduce mental fatigue, and to make the user's memory and brains function better.

Abstract: Computer program product for processing GSR (galvanic skin response) signals, which when run on a computer controls the computer to estimate a level of arousal, or at least a change in the level of arousal, of a user, provided with an algorithm that is configured to control a computer to calculate a third or higher central moment of a recorded GSR signal and to derive an estimation of the level of arousal from said third or higher central moment.