Abstract: An angular position sensor comprising at least one planar excitation coil and at least two planar sensing coils positioned within an interior of the at least one planar excitation coil, each of the at least two planar sensing coils comprising a clockwise winding portion positioned opposite a counter-clockwise winding portion and a rotatable inductive coupling element comprising a sector aperture, the rotatable inductive coupling element positioned in overlying relation to the at least one planar excitation coil and separated from the at least one planar excitation coil by an air gap.

Abstract: A method for controlling the drive current in a stepper motor includes measuring stepper motor current, computing a load angle of the stepper motor, calculating a torque ratio of the stepper motor, generating a reference current as a function of the torque ratio and a maximum current setting for the stepper motor, and setting the drive current of the stepper motor as a function of the reference current.

Abstract: A method for detecting failure of speed measurement of a multi-phase AC motor includes (1) sensing current drawn by the motor, (2) sensing voltage magnitude supplied to the motor, (3) measuring motor speed, (4) calculating motor speed, (5) determining whether the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, if the difference between the measured motor speed and the calculated motor speed is not greater than a predetermined threshold, repeating (1) through (5), if the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, indicating a fault, if a fault is indicated, performing a predetermined number of restart attempts, if the motor is successfully restarted, repeating (1) through (5), if the motor is not successfully restarted, indicating a restart failure.

Abstract: A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at an output signal frequency, and a phase comparator configured to compare the output signal or a signal derived from the output signal, with a reference signal at a reference signal frequency or a signal derived from the reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator. A frequency error measuring circuit produces a frequency error signal that directly represents a frequency difference between the output signal frequency and the reference signal frequency. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and providing the combined control signals to the digital controlled oscillator.

Abstract: In one example implementation, a system for ranking target dimensions includes a model engine to generate a three-dimensional (3D) model of an object from a scan of the object, an analysis engine to analyze the 3D model of the object and determine target dimensions of the object, a ranking engine to rank the target dimensions based on target dimension characteristics, historical scan information related to the target dimension characteristics, or a combination thereof, and a display engine to display information relating to the ranked target dimensions of the object.

Abstract: Embodiments of a wellhead assembly have a tubular body with a removable bottom cap to house a tubing rotator comprising a multi-enveloping worm gear assembly which provides sufficient torque to rotate tubing strings in deep and/or deviated wellbores. The bottom cap is supported on a wellhead having a dognut for supporting a production string therefrom in a wellbore. The bottom cap rotatably supports a mandrel and multi-enveloping worm wheel thereon, the mandrel being connected to the dognut and tubing string for co-rotation therewith. The tubular body supports a multi-enveloping worm for engagement with the worm wheel when the tubular body is lowered axially onto the bottom cap. When the tubular body and worm are lifted axially from the bottom cap, the worm wheel and mandrel are exposed for repair or replacement without need to pull the production string from the wellbore.

Abstract: An angular position sensor comprising at least one planar excitation coil and at least two planar sensing coils positioned within an interior of the at least one planar excitation coil, each of the at least two planar sensing coils comprising a clockwise winding portion positioned opposite a counter-clockwise winding portion and a rotatable inductive coupling element comprising a sector aperture, the rotatable inductive coupling element positioned in overlying relation to the at least one planar excitation coil and separated from the at least one planar excitation coil by an air gap.

Abstract: A panel associated with maintaining security of mobile devices. The devices such as mobile phones may be registered with user codes at the panel. If a user wants to access the panel, the user may enter a user code corresponding to a number of the device. The device may have a geo-location app in that the panel can track the device. If the user is within the pre-determined range of a protected location, another check about the user may be effected with a face recognition app. A face scan of the user may be compared with a face of an authorized user. If the user is found to be unauthorized anywhere along the above-noted process, then the user may be deemed to be an intruder, and an alert can be sent to a central monitor station, which may take action to remove any threat associated with the intruder.

Abstract: A panel associated with maintaining security of mobile devices. The devices such as mobile phones may be registered with user codes at the panel. If a user wants to access the panel, the user may enter a user code corresponding to a number of the device. The device may have a geo-location app in that the panel can track the device. If the user is within the pre-determined range of a protected location, another check about the user may be effected with a face recognition app. A face scan of the user may be compared with a face of an authorized user. If the user is found to be unauthorized anywhere along the above-noted process, then the user may be deemed to be an intruder, and an alert can be sent to a central monitor station, which may take action to remove any threat associated with the intruder.

Abstract: A method for detecting a stall condition in a stepper motor includes measuring stepper motor current, computing load angle of the motor, and detecting a stall condition if the load angle is more than 90 degrees.

Abstract: Examples disclosed herein relate to a three-dimensional object to be displayed on a browser. Examples include to acquire, from a remote system, a three-dimensional object to be displayed in a browser of a computing device. The computing device to display an active region edit interface on the browser. The computing device to acquire an edit request for an active region of the three-dimensional object in the active region edit interface. The computing device to provide, to the remote system, the edit request for the active region of the three-dimensional object. The computing device to acquire, from the remote system, an edited three-dimensional active region corresponding to the edit request for the active region. The computing device to display the edited three-dimensional active region as part of the three-dimensional object on the browser.

Abstract: CEST imaging technique and MR scanning are used as an MRI method for detecting levels of lactate in vivo by exploiting the exchange of —OH protons on lactate with bulk water. In accordance with this method, one first obtains a lactate CEST MRI map of a slice of the body of a patient. A contrast agent such as pyruvate, glucose or glutamine is administered and a post-administration CEST MRI map is obtained. The difference in the spatial maps indicates the level of expression of lactate in the tissue of interest.

Abstract: A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at an output signal frequency, and a phase comparator configured to compare the output signal or a signal derived from the output signal, with a reference signal at a reference signal frequency or a signal derived from the reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator. A frequency error measuring circuit produces a frequency error signal that directly represents a frequency difference between the output signal frequency and the reference signal frequency. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and providing the combined control signals to the digital controlled oscillator.

Abstract: A method for detecting failure of speed measurement of a multi-phase AC motor includes (1) sensing current drawn by the motor, (2) sensing voltage magnitude supplied to the motor, (3) measuring motor speed, (4) calculating motor speed, (5) determining whether the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, if the difference between the measured motor speed and the calculated motor speed is not greater than a predetermined threshold, repeating (1) through (5), if the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, indicating a fault, if a fault is indicated, performing a predetermined number of restart attempts, if the motor is successfully restarted, repeating (1) through (5), if the motor is not successfully restarted, indicating a restart failure.

Abstract: A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at a frequency. A phase comparator compares the output signal, or a signal derived therefrom, with a reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator from an output of the phase comparator. A frequency error measuring circuit coupled to the output of the phase comparator produces a frequency error signal. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and provides the combined control signals to the digital controlled oscillator.

Abstract: A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at a frequency. A phase comparator compares the output signal, or a signal derived therefrom, with a reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator from an output of the phase comparator. A frequency error measuring circuit coupled to the output of the phase comparator produces a frequency error signal. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and provides the combined control signals to the digital controlled oscillator.

Abstract: Examples disclosed herein relate to a three-dimensional object to be displayed on a browser. Examples include to acquire, from a remote system, a three-dimensional object to be displayed in a browser of a computing device. The computing device to display an active region edit interface on the browser. The computing device to acquire an edit request for an active region of the three-dimensional object in the active region edit interface. The computing device to provide, to the remote system, the edit request for the active region of the three-dimensional object. The computing device to acquire, from the remote system, an edited three-dimensional active region corresponding to the edit request for the active region. The computing device to display the edited three-dimensional active region as part of the three-dimensional object on the browser.

Abstract: According to an example, an operation on a version of an electronic content may be performed and a determination as to whether the operation is an editing operation may be made. In response to the operation being an editing operation, a new version may be created and information pertaining to the performance of the operation on the new version may be recorded. In addition, for each significant version, information pertaining to the significant version may be displayed, in which the information may include an identification of the significant version, available operations on the significant version, and a last operation performed on the significant version, in which a significant version may include a version in which no editing operations have been applied or a version in which an operation that is visible to another user has been performed on the version and the operation is outstanding.

Abstract: A magnetic resonance pulse sequence technique may acquire a water reference spectrum and two water suppressed metabolite spectra and with frequency selective inversion pulse centered at either single frequency, at multiple frequencies, or in a single acquisition. Subtraction of the inverted from non-inverted water suppressed metabolite spectrum results in single or a combination of specific metabolite peak/peaks alone with a flat baseline for easier quantification.

Abstract: A non-invasive imaging approach using CEST and MRS may be used to monitor the cleavage of the poly-L-glutamate (PLG) backbone. The cleavage of PLG by cathespsin B can expose exchangeable —NH2 protons in the PLG that are then monitored non-invasively through CEST. The technique can provide direct information on malignant tissue and tumor aggressiveness, and can also be used to monitor treatment.