Abstract: A node for detecting local anomalies in an overhead power grid having at least one power line. The node includes a processing unit and a memory, wherein the node further includes: an electric field sensor configured to measure a first parameter related to an electric field around the at least one power line, and a magnetic field sensor configured to measure at least second parameter related to a magnetic field around the at least one power line. The processing unit is configured to: compare the measured first parameter and at least second parameter with historic data stored in the memory to identify local anomalies, and forward data related to the identified local anomalies to a system controller via a communication interface.

Abstract: A node for detecting local anomalies in an overhead power grid having at least one power line. The node includes a processing unit and a memory, wherein the node further includes: an electric field sensor configured to measure a first parameter related to an electric field around the at least one power line, and a magnetic field sensor configured to measure at least second parameter related to a magnetic field around the at least one power line. The processing unit is configured to: compare the measured first parameter and at least second parameter with historic data stored in the memory to identify local anomalies, and forward data related to the identified local anomalies to a system controller via a communication interface.

Abstract: Electric power is produced in a fuel cell array based on chemical fuel provided from a fuel source. The electric power is held available via an output terminal. A sensor cell registers a sensor signal reflecting a degree of consumption of chemical fuel in the fuel cell array relative to an amount of chemical fuel received in the fuel cell array. The production of electric power in the fuel cell array is monitored by measuring at least one voltage in the fuel cell array. A fraction of the electric power produced by the fuel cell array is controlled to be fed into a dynamic electric load connected to the output terminal. The fraction fed into the dynamic electric load is controlled in response to the sensor signal such that a difference is minimized between the amount of chemical fuel received in the fuel cell array and an amount of chemical fuel consumed in the fuel cell array when producing the electric power.

Abstract: A control device is used in a method for controlling the pen based on an analog measuring signal from the force sensor by a processor comparing the analog measuring signal with a fixed reference signal and, based on the comparison, selectively initiating conversion of the analog measuring signal into a sequence of digital force values.

Abstract: Interactive digital content for printed materials is provided using applications executing in a smart pen computing system. The applications and the printed materials may be developed by separate entities but appear well integrated from the perspective of a user of the smart pen computing system. Printed content produced by a first entity is obtained. The printed content is associated with a dot pattern. An application associated with the printed content and linked to the dot pattern is produced by a separate second entity. The application includes computer program instructions for, responsive to a selection within the dot pattern, invoking a function related to the printed content. The selection within the dot pattern may be made using a smart pen device, and the function may include presenting output to a user through an output device (e.g., a display or speaker) of the smart pen device.

Abstract: Interactive digital content for printed materials is provided using applications executing in a smart pen computing system. The applications and the printed materials may be developed by separate entities but appear well integrated from the perspective of a user of the smart pen computing system. Printed content produced by a first entity is obtained. The printed content is associated with a dot pattern. An application associated with the printed content and linked to the dot pattern is produced by a separate second entity. The application includes computer program instructions for, responsive to a selection within the dot pattern, invoking a function related to the printed content. The selection within the dot pattern may be made using a smart pen device, and the function may include presenting output to a user through an output device (e.g., a display or speaker) of the smart pen device.

Abstract: Interactive digital content for printed materials is provided using applications executing in a smart pen computing system. The applications and the printed materials may be developed by separate entities but appear well integrated from the perspective of a user of the smart pen computing system. Printed content produced by a first entity is obtained. The printed content is associated with a dot pattern. An application associated with the printed content and linked to the dot pattern is produced by a separate second entity. The application includes computer program instructions for, responsive to a selection within the dot pattern, invoking a function related to the printed content. The selection within the dot pattern may be made using a smart pen device, and the function may include presenting output to a user through an output device (e.g., a display or speaker) of the smart pen device.

Abstract: A computer-implemented method is designed for printing on regular digital printers of a coding pattern consisting of regularly spaced code symbols. In the method, a page-describing code (e.g. in PostScript programming language) is generated for the printer. The generation of the page-describing code is based a character definition set which assigns a set of characters to represent a set of mutually unique groups of the code symbols. By mapping the set of mutually unique groups against the coding pattern, the location of corresponding groups within the coding pattern can be identified. Each of the corresponding groups is then represented by its assigned character in the page-describing code. The resulting page-describing code is small in size and has a reduced set of printer instructions that can be processed efficiently by the receiving printer.

Abstract: Interactive digital content for printed materials is provided using applications executing in a smart pen computing system. The applications and the printed materials may be developed by separate entities but appear well integrated from the perspective of a user of the smart pen computing system. Printed content produced by a first entity is obtained. The printed content is associated with a dot pattern. An application associated with the printed content and linked to the dot pattern is produced by a separate second entity. The application includes computer program instructions for, responsive to a selection within the dot pattern, invoking a function related to the printed content. The selection within the dot pattern may be made using a smart pen device, and the function may include presenting output to a user through an output device (e.g., a display or speaker) of the smart pen device.

Abstract: A versatile electronic pen (100) includes a system for interacting with position data representing the pen's movement on a product (110) provided with a position-coding pattern (P). The system comprises an audio module which is operable to correlate the position data with audio data and to provide the audio data for output on a speaker device (104). The system also comprises at least one of a position storage module which is operable to store the position data in a persistent-storage memory (102), and a position streaming module which is operable to provide the position data as a bit stream for real-time output on an interface (105) for external communication. The operation of the modules is selectively activated as a function of the position data, and the modules suitably operate independently of each other.

Abstract: The invention relates to a method, a computer program product and a device for arranging a first and a second coordinate area relative to each other, which first and second coordinate areas are coded on a first and a second surface by a position-coding pattern. The method comprises the steps of receiving an electronic representation of a continuous line that has been drawn over the surfaces while the position-coding pattern on these was recorded, and creating an association between the first and second coordinate areas, based on a direction in which the line was drawn over a discontinuity in the Position-coding pattern, a first association being created if the line was drawn in a first direction and a second association being created if the line was drawn in a second direction.

Abstract: A system and method for achieving an electronic information service (also called an online graphical message service) hosted by a computer system (e.g., a server) connected to a network. Remote users can write information into and read information from the information service over the network. In response to a request from a first user, the service may create a first information object that comprises a partial area of a virtual pixel area. The virtual pixel area may include information written by the remote users. Then, the service may transmit the first information object via the network to the first user. Later, the service may receive a second information object from the first user corresponding to at least part of the partial area of the virtual pixel area. The second information object may include modifications the first user made to the partial area of the virtual pixel area. The service may then update the virtual pixel area utilizing the received second information object.

Abstract: A control device is used in a method for controlling the pen based on an analog measuring signal from the force sensor by a processor comparing the analog measuring signal with a fixed reference signal and, based on the comparison, selectively initiating conversion of the analog measuring signal into a sequence of digital force values.

Abstract: An electronic pen has a force sensor whose electrical resistance varies in accordance with the amount of force applied to the pen stem of the pen. The force sensor is a modular unit with an electrode and a closure, which are mutually arranged in an essentially electrically insulated initial position. The closure, which conveniently is cantilevered on the electrode, is adapted to receive axial forces from the pen stem and thereby to be urged to an activated position in electrical contact with the electrode. The closure is also arranged, on relaxation of the axial forces, to automatically spring from the activated position back to the initial position.

Abstract: An electronic pen has a body, a cap and an actuation device. The actuation device comprises a sensor arrangement for sensing presence or absence of the cap on the body. The actuation device is operable to activate the electronic pen in response to removal of the cap from the body or in response to placement of the cap on a portion separated from a front end portion of the body. The actuation device is further operable to deactivate the electronic pen in response to placement of said cap on said body. Methods for activating and deactivating an electronic pen are also described.

Abstract: A computer-implemented method is designed for printing on regular digital printers of a coding pattern consisting of regularly spaced code symbols. In the method, a page-describing code (e.g. in PostScript programming language) is generated for the printer. The generation of the page-describing code is based a character definition set which assigns a set of characters to represent a set of mutually unique groups of the code symbols. By mapping the set of mutually unique groups against the coding pattern, the location of corresponding groups within the coding pattern can be identified. Each of the corresponding groups is then represented by its assigned character in the page-describing code. The resulting page-describing code is small in size and has a reduced set of printer instructions that can be processed efficiently by the receiving printer.

Abstract: Method and system for information association based on an absolute position coding pattern comprising dots or markings which codes coordinates for a position on an imaginary surface. The imaginary surface comprises several regions which are divided in areas, each defined by said coordinates. Handwritten information is digitized by a handheld device which is moved over a surface provided with said pattern and acts like a pen to make notes on the surface. At the same time, the pattern is sensed and coordinates for the pen is calculated regularly. By passing the handheld device over the borderline between areas having different coordinates, a hyperline is generated having a discontinuity. Such a hyperline is easily recognized by the computer system and is used for connecting information at different areas, giving information some properties, like color, or performing an action on the information, such as encryption, or transferring the information to a recipient.

Abstract: A power management unit (40) for a portable electronic apparatus is disclosed. The apparatus is powered by at least a battery (42), and the power management unit is implemented as an integrated circuit.

Abstract: Systems and methods consistent with the present invention include a printer for printing graphical information on a surface. The printer includes a print head for printing indicia on the surface and an image sensor for recording an image of the surface. The recorded image contains a position-coding pattern that identifies a position on the surface. A processor converts the recorded image into a recorded position, and the print head then prints indicia on the surface based on a comparison of the recorded position with the graphical information to be printed.

Abstract: An electronic pen (10) has a force sensor (16) whose electrical resistance varies in accordance with the amount of force applied to the pen stem (14) of the pen. The force sensor (16) is a modular unit with an electrode and a closure, which are mutually arranged in an essentially electrically insulated initial position. The closure, which conveniently is cantilevered on the electrode, is adapted to receive axial forces from the pen stem (14) and thereby to be urged to an activated position in electrical contact with the electrode. The closure is also arranged, on relaxation of the axial forces, to automatically spring from the activated position back to the initial position.