Abstract: A method and an apparatus is disclosed for efficient cross correlation of a plurality of signal vectors. Incoming data is partitioned into several segments and processed according to an algorithm where data rotation is a function of post-correlation memory size.

Abstract: An electronic device, such as a digital camera, includes sensors to acquire subject data, such as an electro-optical image, as well as additional sensors to acquire meta-data such as temperature, humidity, the identification of the subject data, and the data and time. The electronic device further includes an image evaluator, to determine the best steganographic method to use to combine the meta-data and the subject data, and a steganographic engine, to combine the meta-data and the subject data in an undetectable manner. In this way, meta-data can be associated with the subject data when the subject data is acquired and in a manner that attaches the meta-data and the subject data without requiring generating and maintaining two, linked data sets.

Abstract: A local area network (LAN) of tracked mobile assets which are temporarily located in an area having a high density of mobile assets, such as a railway yard, employs a stationary master tracking unit that is responsible for communicating with mobile tracking units affixed to the mobile assets and transmitting information to a central station. The stationary master tracking unit may be mounted at an elevation, as on a pole, and single or multiple stationary master tracking units may exist in the same vicinity. Each stationary master tracking unit has a constant supply of power and communicates with the central station by way of either satellites or dedicated land line connection. A protocol is provided for communicating between the Stationary master tracking unit and the mobile tracking units. The protocol provides a mechanism for acquiring new mobile tracking units entering the railway yard and a mechanism for releasing mobile tracking units leaving the railway yard.

Abstract: A computerized tomography (CT) system includes a stationary frame, an annular rotating frame and apparatus that includes a phase splitter for supplying first and second modulated carrier constituents being 180.degree. out-of-phase between one another while maintaining a uniform amplitude over the bandwidth for the modulated carrier. A transmission line is attached to the rotating frame and is positioned around the annular rotating frame. The transmission line comprises individual segments having first and second conductors respectively coupled to the he phase splitter to receive the first and second modulated carrier constituents. A coupler is attached to the stationary frame and is positioned sufficiently near the transmission line for establishing radio coupling therebetween to receive the first and second modulated carrier constituents being applied to any individual segment.

Abstract: A shock detector for measuring intermittent shock events comprises a mechanical delay line to supply delayed output motion in response to input motion along an input axis. A transducer converts the delayed output motion to an electrical signal representative of the delayed output motion. The transducer is generally in a respective inactive state to reduce the power consumption of the shock detector. A relatively low power motion sensor, such as low power accelerometer or tilt actuated switch, is employed for switching the transducer to a respective active state in response to the input motion thereby allowing the shock detector to measure any intermittent shock event regardless of the generally inactive state of the transducer.

Abstract: A computerized tomography (CT) system includes a stationary frame, an annular rotating frame and apparatus that includes a phase splitter having an input port coupled to receive a modulated carrier having a relatively wide bandwidth. The phase splitter has first and second output ports for supplying, respectively, first and second modulated carrier constituents having a uniform phase angle differential, such as 180.degree., between one another while maintaining a uniform amplitude over the bandwidth for the modulated carrier. A transmission line is attached to the rotating frame and is positioned around the annular rotating frame. The transmission line comprises one or more individual segments having first and second conductors respectively coupled to the output ports of the phase splitter to receive the first and second modulated carrier constituents from the phase splitter.

Abstract: A computerized tomography (CT) system having a stationary frame and an annular rotating frame is provided. The CT system includes a transmission line attached to the rotating frame and positioned around the rotating frame. The transmission line comprises individual segments each having a respective first end and a respective second end and having a respective electrical length chosen so that a modulated signal simultaneously applied at each respective first end has, for example, a substantially similar time-delay upon arrival at each respective second end. The individual segments are arranged so that respective first ends of any two consecutive segments are adjacent to one another and respective second ends of any two consecutive segments are adjacent to one another to avoid time-delay discontinuity in the modulated signal propagating therethrough.

Abstract: A computerized tomography (CT) system includes a stationary frame and an annular rotating frame. The CT system further includes a transmission line made up of individual segments each having a first end and a second end and having a respective electrical length chosen so that a modulated signal simultaneously applied at each respective first end has a predetermined time-delay upon arrival at each respective second end. The individual segments are arranged so that respective first ends of any two consecutive segments are adjacent to one another and respective second ends of any two consecutive segments are adjacent to one another to avoid time-delay discontinuity in the modulated signal propagating therethrough. A shield is affixed to the transmission line for shielding the transmission line from electromagnetic radiation.

Abstract: Apparatus comprising a transmission line and a coupler are provided for high data rate communication between rotating and stationary frames of a computerized tomography system. The transmission line comprises individual segments each having a respective first end and a respective second end and having a respective electrical length chosen so that a modulated signal simultaneously applied at each respective first end has a predetermined time-delay upon arrival at each respective second end. The individual segments are arranged so that respective first ends of any two consecutive segments are substantially adjacent to one another and respective second ends of any two consecutive segments are substantially adjacent to one another to avoid time-delay discontinuity in the modulated signal propagating therethrough.

Abstract: A computerized tomography (CT) system includes a stationary frame and an annular rotating frame. The CT system further includes a differentially driven transmission line attached to the rotating frame and positioned around the rotating frame. The differentially driven transmission line is made up of individual segments each having a respective first end and a respective second end and having a respective electrical length chosen so that a modulated signal simultaneously applied at each respective first end has a predetermined time-delay upon arrival at each respective second end. The individual segments are arranged so that respective first ends of any two consecutive segments are substantially adjacent to one another and respective second ends of any two consecutive segments are substantially adjacent to one another to avoid time-delay discontinuity in the modulated signal propagating therethrough.

Abstract: A method for enhancement of edge detail in fingerprint minutia first illuminates the finger with light passing through a polarizer in a first direction with respect to the polarization plane, for at least a portion of one rotation of the light source/polarizer about an optical axis generally perpendicular to the finger. The light reflected from the finger is converted to video data during at least a selected part of the rotation and the first set of video data is stored in a first storage means register. The illuminating, converting and storing steps are then repeated with light from a second direction, substantially orthogonal the first direction, illuminating the finger, and with a second set of video data, (for at least the same part of another rotation) being stored in a second register.