摘要:
A mass is levitated with respect to a base, at least one of which is comprised of a diamagnetic material, with the levitated mass also having a permanent magnetic property. A second permanent magnet is optionally configured such that it attracts the levitation mass away from the base to overcome gravitational force on the mass, thereby suspending the mass over the surface of the base. The mass is contained in a nonmagnetic, non-shielding and optionally optically-transparent housing so as to limit its excursion within a range of levitation positions. A position measurement means such as a laser interferometer, capacitance detector, or pickup coil is configured to measure positional deviations of the mass in response to incident pressure wave, the output of which being an electronic signal representing the pressure wave.
摘要:
A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. it is programmed. Over time, the charge storage element then loses the charge through its insulating medium. Given the reduction of the electric potential of the programmed charge storage element at a substantially known discharge rate, and by observing the potential of the programmed charge storage element at a given point in time, an elapsed time period can be determined. Thus, the time cell measures an elapsed time period without a continuous power source. One type of time cell is an analog time cell that may have a form similar to a non-volatile memory cell, particularly a floating gate field effect transistor (FGFET). The time cell may have an expanded floating gate for storing an electrostatic charge. At a given point in time after programming the analog time cell, a sensing operation indirectly observes the retained charge in the floating gate by directly or indirectly observing the threshold voltage of the FGFET. By knowing the operational characteristics of the time cell and its initial programming condition, the observation can be converted into an elapsed time value. A time cell can be designed and/or programmed to select the range of time to be measured.
摘要:
A data processing system and method are provided for using URLs to access files located on the Internet in a similar manner used to access local files.
摘要:
A method and apparatus provides a central dictionary and glossary server. An application executing on a client is able to access a local copy of a dictionary or glossary. A master dictionary or glossary is updated at a server, and the update to the master dictionary or glossary is served to the application on the client to update the local copy of the dictionary or glossary. A datastream may also be processed by automatically scanning a datastream and automatically detecting, in the datastream, a word that cannot be matched to a word in a dictionary or glossary. The unmatched word is identified as an acronym, and in response, data associated with the acronym, selected from a hierarchical set of glossaries, is inserted into the datastream in close proximity to the acronym. In another aspect of processing a datastream, in response to an indication that the unmatched word is a properly spelled new term, a dictionary or glossary may be updated with the new term, and the dictionary or glossary is a member of a hierarchically ordered set of dictionaries and/or glossaries. The system may also contain an organizational database comprising information for organizational units associated with a data processing system, and each glossary in the hierarchical set of glossaries is associated with an organizational unit.
摘要:
A method and system of certifying that a copy of a Web page was made at a particular time by a user of a Web client. A client piece preferably includes a one-way hashing function that, when applied to a Web page copy, generates a unique string. The string is concatenated with a URL for the Web page, a timestamp and other identifying information, to generate a signature. Using a public key cryptosystem, the signature is provided to a certification server. Upon receipt, the server first determines whether the signature represents the Web page copy. If so, a confirmation is sent to the client, and the signature is stored in a database. Preferably, the Web page copy itself is not stored in the database. Signatures from other Web page copies received during a given period (e.g., the same day) are then summed and the sum is published. Later, when the user desires to verify that the Web page copy is authentic, a determination is made regarding whether application of the given function to the page generates a signature previously stored in the database and/or a value equal to the published sum for the given day. If so, the Web page copy is accepted as authentic.
摘要:
A handheld, pen-like colorimeter for measuring the color of an object is provided. The invention includes three light sensors, each of which detects a separate primary color. A microprocessor in the colorimeter calculates a single composite color value from the three separate color measurements from the light sensors and then compares the composite color value with a list of color values, wherein each value corresponds to a unique color name. The colorimeter selects the color name that matches the composite color value of the object presents the color name to a user, using a liquid crystal display (LCD) or an audio speaker. Another embodiment of the present invention uses lasers emitting primary colors, rather than passive light sensors. The lasers shine on an object one at a time, and the reflected laser light from the three lasers is detected by a special light sensor. The three color measurements are then combined to produce a composite value, similar to the first embodiment.
摘要:
A navigation device includes accelerometers for measuring movement. Given a beginning location and orientation, the device determines current location and orientation based on the information from the accelerometers. A user enters a list of items, such as a shopping list, into the device and the device determines a path to the items. The device then generates and presents directions for navigation. The path may be calculated to avoid hazards; such as shelves being stocked, congested checkout lines, and spilled items. The item list may be loaded into the device, using the bar code reader, optical character recognition, or through a store computer or the Internet. Planes of infrared beams are arranged within the environment such that a navigation device is likely to or must pass through a plane. A path may be computed to ensure that the navigation device passes through an IR plane. The navigation device has a plurality of IR sensors arranged in a tetrahedron. As the device passes through an IR plane, the device receives signals from the sensors. Given the order and timing of the signals and a location of the IR plane, the device performs a calibration. The device is calibrated without requiring the user to place the device in a cradle.
摘要:
A calling service is provided within a conventional Internet operating environment wherein client machines connect to the Internet via an Internet service provider (ISP). The ISP provides Internet access to the users for a time-based or usage-based service fee. According to the invention, a client machine user is provided an option to make a telephone call to a Web site operator during a browsing session. The charges for the telephone call preferably are invoiced by the ISP (or some third party on the ISP's behalf). Thus, when a user elects to make a “one-click” telephone call to the Web site, the charge for the call preferably shows up on the user's ISP billing statement.
摘要:
A multi-user system, method, and computer-usable medium facilitate time-shifting of television program viewing for users. Each user is identified by an associated user profile, and a program schedule, including a list of desired programs to be recorded, is maintained for each user. The television programs are recorded and stored on a hard disk, or other nonvolatile storage, for later viewing by the users. The television programs are preferably stored in a compressed format. Each user can log into the system, at his convenience, and view any of the television programs that have been recorded for him. There is no shuffling through numerous videocassette tapes or skipping over other users' recorded programs to find a desired television program. An option may be used to specify how long to save a recorded television program before it can be erased and overwritten with another program. A master user or users, such as a parent or parents, can add a new user to the system by setting up a new user profile. The master user may set options or restrictions for the new user. If a permanent copy of a television program is desired, it can be written to another medium, such as a compact disk, a DVD, or a videocassette tape.
摘要:
A system and method for expediting service to a user by automatically defaulting to the typical preferences of the user for a remote point of purchase action at a facility which permits such actions is described. In one version, the user utilizes a credit or debit card to make a purchase at the facility. After the card is authorized, the user's profile of his or her routine selections at such facilities is retrieved. After the user's profile is obtained, the user is allowed to immediately complete the transaction rather than proceed through the option selection process. The system utilizes the user profile to automatically default the prompts and inquiries of the interface terminal to the typical selections chosen by the user. This feature expedites service to users by allowing them to bypass the interactive option selection process with the terminal. The user may deviate from his or her typical selections by entering alternate selections in a conventional manner at any time.