Abstract: An adaptive beamforming system for broadband sonar with a convergence time on the order of the pulse duration and effective interference nulling capabilities which enhance desirable echoes. The method uses an element based time implementation algorithm in which beam data that is formed in the direction of each interferer is successively subtracted from the element data using an adaptive FIR filter. The system can be applied to impulsive source sonar data and passive sonar data.

Abstract: A system optimally assigns pseudo-noise (PN) offsets in a cellular network that includes several sectors. The system sets parameters for the cellular network, determines potential interference between each of the sectors and mobile units in the cellular network based on the set parameters, and identifies constraints for each of the sectors based on the determined potential interference. The system then approximates a highest co-offset protection value for successful PN offset assignments based on the determined potential interference and the identified constraints, and selectively adjusts a sector co-offset protection value using the approximated highest co-offset protection value as a starting point to obtain optimum PN offset assignments.

Abstract: A computer assisted method for recognizing and labeling instances of name classes in textual environments is described. The invention receives training text having instances of named-entity classes labeled, from which it generates a database of bigram and unigram occurrences. The invention uses the database of bigram and unigram occurrences to form a two level Hidden Markov Model with single output states at the lower level. The invention also receives a series of input text to be processed and labeled with respect to the name classes, and the invention uses the two level Hidden Markov Model to recognize and label instances of named-entity classes in the input text.

Abstract: A method for reducing the time, cost and apparatus required for monitoring the geometry of the oil/water, oil/gas, or gas/water interface in an underground reservoir. By strategically placing sources and sensors, and by fixing the sensors to the solid earth surface beneath the water, and by knowing the velocity fields in the overburden, the changing edges and geometry of the oil may be determined with significantly reduced data gathering. The strategic positions of the sources and receivers is determined by referencing to the known geometry from past surveys. In addition the velocity of the overburden is known by these prior surveys. In addition, higher resolution of reflectivity areas is achieved by use of sound sources capable of generating higher frequencies compensated for the earth's attenuation and by utilizing long integration times to improve signal to noise ratio. These sound sources can be smaller than prior art sources since they provide directed beams of narrower widths.

Abstract: Web pages retrieved by a browser core are translated into user interface component definitions and page information. The definitions and page information are transmitted to a user device which recomposes the definitions and page information into a format for presentation to a user on a user device. Transmitting the definitions and page information includes translation of the definitions and page information into a format appropriate for both the particular communications media on which the information is transmitted, and the device to which the information is transmitted. The device includes a browser client which performs the recomposition. The browser client also receives user input, and may respond by altering the information locally at the user device, and sending information related to the user selection back to the browser core for further processing.

Abstract: A churn amelioration system (20) supports data feeds from mobile switching centers (32), billing systems (34), and customer service systems (36). The system (20) maintains an extensive database (42) of customer/unit data and of rules which indicate how to interpret the data. A churn history process (68) establishes rules for predicting the likelihood of churn. An administration process (86) establishes action-related and offer-related rules and assigns identified customer/units to selected organization representative user (ORU) in-boxes so that the identified customers may be proactively contacted by the ORUs. The ORUs interactively operate a churn amelioration process (126). The churn amelioration process (126) proactively or reactively identifies a specific customer/unit (128), then calculates churn vulnerability (140) and customer worth (150). The system (20) prompts ORUs with pre-approved potential offers (192) which may be extended to customers. These offers are configured in response to customer worth.

Abstract: An apparatus and method for reducing vibrational noise generated by the operation of a machine. The machine includes an electric motor that is driven by a drive current generated by a power source. The vibrational noise generated by the operation of the machine induces a waveform in the drive current. An input device monitors the waveform of the drive current and quantifies the induced waveform. A signal processor translates the quantified waveform into a control waveform. A control device adds the control waveform to the drive current, thereby reducing the vibrational noise generated by the machine.

Abstract: An emergency call originates from a cellular radiotelephone (20) and communicates through one of A-side and B-side cellular systems. Upon receipt of the call, the cellular radiotelephone (20) is assigned a temporary substitute Mobile Identification Number (MIN) (100) by the receiving A-side or B-side cellular system MTSO (33). Upon termination of the emergency call, a call-back to the cellular radiotelephone (20) is routed to both of the A-side and B-side MTSOs (100), using the substitute MIN (100), by the Public Switched Telecommunications Network (36). Both A-side and B-side MTSOs (100) issue a page order message to cellular radiotelephone (20) by transmitting to the MIN (74). Paging order confirmation messages (78), conveying the MIN (74), are evaluated for a match with a unique Electronic Serial Number (76).

Abstract: This invention relates to the fast reconfiguration of tree switches. In particular, on-chip parallel control signals are time staggered so that they track the propagation of data or information bits. As a result, it is unnecessary to stop the flow of data bits from the data inputs to the data outputs during the reconfiguration of the tree switch.

Abstract: A method and system for creating and administering certificates digitally signed by a trusted entity (certificate authority) to ensure that certificated transactions are authenticated as that of a particular entity. Requests for a certificate, along with verification information, are directed to the certificate authority, where they are held and accessed by an entity having verification responsibilities (registration authority) and approved or disapproved.

Abstract: A communication system that provides call connections and voice mail service to telephone devices. With this system, a called party has the ability to monitor and control an incoming voice mail message, made by a calling party, which is to be recorded onto a voice mail system. The system includes a switch that connects the incoming calls to the called party and the voice mail system. A voice mail intercept service terminal receives a message to be recorded on the voice mail system and also selectively connects the incoming call to the called party for a two-way communication.

Abstract: In the stereo radiographic system, an electronic x-ray image detector is exposed, through a three dimensional object to be viewed, with x-rays successively from two points separated by a preselected angle. The respective signals generated by the x-ray image detector during the successive exposures are digitized and stored. A video display is driven to generate, on successive frames, alternating images based on respective ones of the stored signals and the eyes of a user viewing the display are alternately occluded in synchronism with the alternation of the images thereby to provide to the user a stereoscopic densitometric view of the three dimensional object.

Abstract: A cellular radiotelephone (24) engages in a call over a bidirectional channel (32) involving a cellsite base station (68) within a cellular network (22). Upon receipt of a notice (46), a geographical location computer (20) is activated and transmits a call locate instruction identifying the bidirectional channel (32) to a plurality of dual channel receivers (56, 58, 60, and 61). The dual channel receivers (56, 58, 60, and 61) are then tuned to the bidirectional channel (32) and receive the forward (78) and reverse (82) location signals over forward and reverse directions of the bidirectional channel (32). A probable location of the cellular radiotelephone (24) is determined by measuring phase differences of the forward (78) and reverse (82) location signals at each of the dual channel receivers (56, 58, 60, and 61).

Abstract: The present invention involves a combination of active and passive optical or opto-electronic device alignment techniques. Passive alignment is used for two axial lateral directions and all three axial rotational directions (yaw, pitch and roll). In such passive alignment, only the substrate is micromachined with passive alignment structures. One-dimensional active alignment is then used for the remaining axial lateral direction.

Abstract: A method and system for distributing subscriber services to a number of user locations in a broadband cellular network. A bidirectional antenna array located at a number of cell centers provides coverage over a wide service area by using wireless distribution loops. The cell centers broadcast subscriber services over designated channels and a user at the subscriber site location commands a centralized mechanism to switch to the channel broadcasting the requested service. The duplication of service channels is minimized and the number of subscribers is maximized by allowing channel selection to occur at various points in the distribution network. Each antenna in the array is configured to provide the subscriber service to a particular service segment. These segments include subscriber location sites with processing equipment to request and receive the services in the form of information programs, data, signaling, etc.

Abstract: A voice activated system for retrieving information from relation files in a database incorporating a "help" mechanism that leads the user to relevant information. The apparatus and method provides the user with a message that the spoken queries are understood or not. If understood the system outputs the desired information. If not understood the system asks for key words from the user. The system will respond with phrases using such key words that were built into the system vocabulary. The user may input the phrases into the recognition part of the apparatus or may voice new queries based on the phrase/sentences. The system responds with the desired information.

Abstract: A radiotelephone (10) simulates the call origination process performed by land-line telephones. Dial tone is generated (78) in response to an off-hook condition and removed when a first digit (54) is dialed. A timer process (84, 110) and a number analysis process (100) simultaneously evaluate dialed digits to detect the completion of dialing. The number analysis process (100) identifies seven, ten, and eleven digit, and indeterminate length phone number formats (64, 66, 52, 68). The ten digit format is recognized in response to remotely programmed (42) connected NPA codes. For most calls, the number analysis process (100) instantly detects a phone number's final digit (62). In a few cases the timer process (84, 110) detects the final digit through the absence of dialing activity for a predetermined duration. When the final digit (62) is detected, an origination message is transmitted to a cellular network.

Abstract: A method for processing speech recognition including a system for generating a first probability of the word or sequence that words in a speech utterance is rejectable and a second probability that the word or sequence of words in the utterance is acceptable. A new Selected Phoneme Rejection Grammar is constructed of phonemes and/or merged phonemes. The highest first probability is calculated by comparing the utterance to sequence of the Rejection Grammar phonemes and/or merged phonemes. A Main Grammar is implemented in which the highest second probability is calculated that the utterance is composed of words in the Main Grammar. The two highest probabilities are compared and the utterance is accepted or rejected depending on the higher of the two highest probabilities. If accepted a sensible response may be made as determined by the specific application.

Abstract: A sound generating device for generating a sound wave in a body of water is provided. The device includes a pair of axially aligned pistons. An electromagnet is mounted on at least one of the pistons. Activation of the electromagnet causes the pistons to move towards each other. A spring is positioned between the pistons and biases the pistons away from each other. Provision is made for changing the spring rate during operation so that the device will operate at mechanical resonance throughout the intended frequency range. A control device controls the current flowing through the electromagnets. The current is controlled to induce a predetermined variance of axial displacement between the pistons and thereby generate a sound wave.

Abstract: A method and computerized apparatus for assigning frequencies to a plurality of cells in a cellular network. Each cell requires a predetermined number of frequencies. The method includes generating a difficulty factor for each cell, wherein each cell's difficulty factor is based on an adjustment factor for that cell, and wherein, following a first unsuccessful assignment attempt, each cell's adjustment factor is indicative of a relative level of difficulty in selecting frequencies for that cell during the first unsuccessful assignment attempt.