Abstract: A scanning method for receiving a signal in a frequency hopped communication system that transmits a packet having N segments that are encoded with an error correction code that allows recovery of a packet even if e segments are erasures. A receiving station continuously scans the first p (1.ltoreq.p.ltoreq.e+1) channels, testing each channel for the existence of a transmission. If detected, a segment is received, and then the receiving station sequences through the remaining channels, receiving the segments if possible, and then applying error correction to the complete transmission. This technique of scanning the first several channels, receiving the first unimpaired segment, and thereby gaining the ability to recover all unimpaired segments enables the full theoretical power of a coded, slow frequency hopped system to be realized.

Abstract: A method of interdicting a guided missile equipped with an active radar-controlled guidance system is shown to include generating decoy signals in a transponder on an decoy launched from a ship being attacked, such decoy signals being formed by amplifying echo signals from the ship to cause the apparent position of the ship (as measured by the active radar-controlled guidance system) to differ from the actual position of the ship so that the guided missile ultimately is caused to miss the ship.

Abstract: A method of interdicting a guided missile equipped with an active radar-controlled guidance system is shown to include generating decoy signals in a transponder on an armed decoy launched from a ship being attacked toward such missile, such decoy signals initially obscuring echo signals from the ship to cause the apparent position of the ship (as measured by the active radar-controlled guidance system) to differ from the actual position of the ship, and, when the decoy and guided missile are in proximity with one another, exploding a warhead on the decoy to destroy the guided missile.

Abstract: An intelligent security device (10) is disclosed for protecting computer software from unauthorized use. The security device (10) is a hardware device having within a microprocessor (36) for interacting with a host computer (32) such that protected software may not be operated unless the security device (10) is in place. Physical duplication of the security device (10) will not result in a workable copy, due to the nature of the microprocessor (36), which is such that information is encoded therein and further such that encryption codes are also stored therein and cannot be discovered after the microprocessor (36) is locked by any known means. A system clock (21) within the microprocessor (36) is adaptable to the purpose of permitting use of the protected software only within limited time parameters.

Abstract: A file security system of such a constitution that after plaintext has been enciphered by data encryption key means the encryption key means per se is stored or made freely transmissible in the state further enciphered by the encrytion key maintained in secret and the information thus processed can be deciphered into plaintext information only by making good use of said encryption key means.

Abstract: A noise signal is obtained from a data processor output, such as a data line, an address line, or a control line, and used to control the frequency modulation of an oscillator. The modulated output is used to clock the data processor.

Abstract: A continuously variable transmission on a motor vehicle is controlled by establishing a target terminal acceleration GO to be reached according to an indication of the driver's intention for acceleration or deceleration, such as the amount of depression of the accelerator pedal, and also to an indication of the speed of the motor vehicle. A present calculative acceleration G.sub.CAL is calculated on the basis of a marginal power Pa of the engine which drives the continuously variable transmission. A target present acceleration Gon required at the present time to vary the present acceleration up to the target terminal acceleration Go to be reached along a desired characteristic curve is established according to the difference .DELTA.G (=Go-G.sub.CAL) between the target terminal acceleration Go to be reached and the calculative acceleration G.sub.CAL.

Abstract: A method and apparatus for communication in a spread spectrum network are disclosed. Blocks of bits embodying information are assigned to corresponding subsets of binary spreading code sequences and at least one of the subsets of binary spreading code sequences contains more than one binary spreading code sequence. Selected subsets of the binary spreading code sequences are then simultaneously transmitted from a transmitting node to a receiving node.

Abstract: A process and apparatus for providing simulation and modeling and control which permits user feedback for purposes of implementing design and process optimization for composite or powder compact materials. Control is achieved through a dual feedback and feedforward hierarchical control scheme employing an interactive modeling system for providing the feedforward control data and a PID control loop for the feedback control. Modeling is based upon constitutive equations which form the basis of modeling solutions derived from the micromechanical relationships inherent in the consolidated materials. The system is implemented in an FEM software platform such that a graphics based visualization in three dimensional form can be provided to the user.

Abstract: An engine controlling system for a vehicle suitable for use with an automobile. When a running condition change-over means develops a constant speed running designating signal, an aimd torque calculating means calculates an aimed output torque of an engine of the vehicle in accordance with an aimed speed, but when the running condition change-over means develops an accelerated running designating signal, the aimed torque calculating means calculates an aimed output torque of the engine in accordance with an aimed acceleration. Meanwhile, an engine output torque detecting means calculates an output torque of a torque converter in accordance with characteristics of the torque converter and an engine rotational speed detection signal detected by an engine rotational speed detecting means and outputs the output torque as a measured value of the output power of the engine.

Abstract: A system for controlling automatic transmissions equipped with a motor vehicle utilizing fuzzy logic. In the system, fuzzy production rules have been prepared based upon an expert driver's judgments and operation made on a vehicle with a manually shifted transmission. Various operating conditions including opening degree of a throttle valve and road speed of the vehicle are detected and from the detected value, various predictions are made such as an appropriateness of vehicle response to a gearshift intended by the driver and engine output change that would occur should the transmission be shifted to a given gear. These measured or estimated values are put on a common scale named universe of discourse and each membership values degree of the aforesaid rules is successively calculated. Among the rules, one rule is finally selected and according to a gear position indicated in the selected rule, the current gear is shifted up or down or is held at the present position.

Abstract: A parcel processing system provides shipping documents required for a number of shipping carriers and/or classes of service. The system includes a keyboard, a scale, a memory, a printer and a processor. The processor receives carrier/service selection signals from the keyboard and transaction data from the keyboard and/or the scale. The processor determines on the basis of the carrier/service selection signal whether to rate or defer a parcel transaction. Data for a deferred transaction is stored in the memory. The foregoing steps are performed with respect to a number of transactions and a number of deferred transactions are combined into an aggregation. The processor receives a deferred rating signal from the keyboard and performs a rating operation with respect to the aggregation of deferred transactions. The printer prints a manifest reflecting the result of the rating operation.

Abstract: This system concerns essentially an encoding algorithm through a unit of non-revealed key data. The OUTPUT vector of the algorithm DLM is given by the sequence number vector ke*s modulo(2exp(n)-1) of a linear sequence generated by a shift register of n bits, with ke being the number composing the encoding key and s the sequence number of the INPUT vector in this linear sequence in relation to a certain origin. We perform a double application of the algorithm DLM, with the input vector of the second application given by the result of the arithmetic product modulo(2exp(n)-1) of the exit vector of the first application by the encrypting key. By using the conjugated key kd, the same procedure allows to restore the input vector (FIG. 1). The encrypting velocity is equal to a quarter of the clock frequency.

Abstract: In a nuclear electric power generating plant connected to an electric power system, an output of a nuclear reactor of the plant is reduced during a nighttime operation, increased to a predetermined level during a daytime operation and reduced during a lunch time operation in which a poisonous effect of fission products, i.e., X.sub.e.sup.135 produced during a decreased output running during a nighttime operation becomes significant.

Abstract: Cryptographic PIN processing is achieved in an improved manner by associating control vectors with the PIN generating (verification) keys and PIN encrypting keys which provide authorization for the uses of the keys intended by the originator of the keys. The originator may be the local cryptographic facility (CF) and a utility program under the control of a security administrator, or the originator may be another network node which uses the key management methods described in the above-referenced copending patent applications to distribute said keys.Among the uses specified by the control vector are limitations on the authority to use the associated key with certain PIN processing instructions, such as PIN generation, verification, translation and PIN block creation. Furthermore, the control vector may limit the authority of certain instructions to process clear PIN inputs (such as in PIN verification).

Abstract: This disclosure relates to a technique for estimating the characteristics of a propagation channel by processing a cyclostationary signal which has passed through it. The technique extends to the use of this estimate to reduce the impact of the channel distortion on the recovered signal. Unique features of this technique include its ability to function even when strong interference is present with the cyclostationary signal of interest.

Abstract: An information transport system for conveying information between a franking meter machine and a Post Office equipment includes a unit having a non-volatile read/write memory which may consist of an EEPROM which can be transported between the meter and the equipment. When the unit is inserted in the franking machine a transaction code is verified by comparison with a registered code and information transfer is effected. The machine then generates a new code and stores it in a register. Upon return of the unit to the Post Office, the equipment responds to the transaction code stored in the unit to generate a new code corresponding to the new code generated and stored in the meter machine.

Abstract: This invention is directed to various improvements in spread spectrum power line communications. One aspect of the invention relates to collision avoidance between varius "slave" unit transmitters trying to send messages to a single "master" unit receiver by detecting whether the transmission path is in use and refraining from transmitting if it is. Other aspects of the invention relate to controlling the frequencies of spread spectrum data messages transmitted, using gold codes to identify the slave units, and switching frequency bands on the powe line to avoid frequencies where there has been a deterioration of transmission. In each embodiment, the signal modulated over the power line is modulated by a signal which is synchronous with A.C. power flowing through the power line used for communications.

Abstract: An inservice inspection of a surface area or welds of a nuclear reactor pressure vessel is carried out, without the need to remove the core barrel and lower internals therefrom, by providing access to the annular chamber between the core barrel and the pressure vessel wall through an aperture in the upper flange of the core barrel. An inspection means, such as an ultrasonic testing device is inserted into the annular chamber through the access and positioned proximate the weld to be inspected and inspection of the weld effected by the device.