Abstract: The invention relates to a method for operating a gas heater, in particular a gas heater for providing central heating and/or for providing domestic hot water, in particular a gas boiler, in particular a condensing boiler, wherein the method comprises the following steps: supplying a gas and a fuel gas into a mixing chamber of the gas heater and supplying a mixed gas from the mixing chamber to a burner of the gas heater, measure the differential pressure per unit time and/or provide a sensor signal to the control unit for determining a gas quantity, defined by a volume per unit time or a mass per unit time, before the gas is supplied to the mixing chamber, measure the differential pressure per unit time and/or provide a sensor signal to the control unit for determining a fuel gas quantity, defined by a volume per unit time or a mass per unit time, before the fuel gas is supplied to the mixing chamber and determining whether at least one operation condition of the gas heater is fulfilled based on the determine

Abstract: A method, device, and computer-readable medium are configured for guiding a person (21) to a destination. The method comprises the steps of storing an association between a person (21) and a content item, wherein the content item comprises audio and/or at least one image, determining a destination for the person (21), determining a current position of the person (21), identifying at least one reproduction device (22, 23, 24, 25) between the current position and the destination, and reproducing the content item on the identified at least one reproduction device (22, 23, 24, 25).

Abstract: The method of guiding a person (21) to a destination comprises the steps of storing an association between a person (21) and a content item, the content item comprising audio and/or at least one image, determining a destination for the person (21), determining a current position of the person (21), identifying at least one reproduction device (22, 23, 24, 25) between the current position and the destination, and reproducing the content item on the identified at least one reproduction device (22, 23, 24, 25). The device for guiding a person to a destination comprises electronic circuitry operative to perform the method of the invention. The computer program product enables a programmable device to perform the method of the invention.

Abstract: A lighting system and method for providing a particular lighting pattern from a predetermined set of lighting patterns are disclosed. The system comprises a presence detector for detecting a presence of a person in an area, a timer for measuring a duration of the presence, a pattern selector for selecting the particular lighting pattern from the predetermined set of lighting patterns based on the presence and the duration, and a plurality of adjustable light sources for applying the particular lighting pattern.

Abstract: A lighting system is provided for providing a particular lighting pattern from a predetermined set of lighting patterns. The system comprises a presence detector for detecting a presence of a person in an area, a timer for measuring a duration of the presence, a pattern selector for selecting the particular lighting pattern from the predetermined set of lighting patterns based on the presence and the duration, and a lighting means for applying the particular lighting pattern.

Abstract: In order to characterize video content, key frames are identified in that content. The key frames are collapsed into histograms. The histograms are grouped into families. The families are each represented by a family histogram. The family histograms characterize the video content. The family histograms can be used to determine program boundaries or index the video content.

Abstract: A multi-user interactive virtual environment system wherein each user is provided with data to generate a respective image of the virtual environment and characters therein, including an assigned character particular to that individual user, from a respective virtual camera viewpoint determined at least partially by the user-directed motion of their assigned character. Each character has an interaction zone of predetermined size and shape maintained about its current virtual environment location. When the respective interaction zones of two or more user-assigned characters overlap, their respective virtual cameras are controlled to move from first- to third-person viewpoints for as long as the overlap remains. In a refinement, at least one further interaction zone at a given location within the virtual environment, and independent of any particular character within the virtual environment, takes control of all character virtual cameras as those characters enter the zone.