Abstract: A transducer for measuring the thickness of ice in a body of water includes a transducer body, at least one ice presence sensor for measuring the presence of ice at a point beyond a boundary layer between the transducer body and the body of water, a flotation element, a controller, and a display assembly. The transducer body includes waterproof membrane sealed orifices positioned on the transducer body for one or more ice presence sensors. A tether point attaches an anchor to keep the transducer at a fixed location in the water body. The ice presence sensor includes a sense probe passing through the waterproof membrane, a sense probe seal, a drive rod, a switch, and an actuator. The display includes one or more visible elements to indicate ice thickness at the transducer location. The ice thickness is inferred by the collective indications at the one or more ice presence sensors.

Abstract: A compliant ground block for a testing system for testing integrated circuit devices is disclosed. The compliant ground block includes a plurality of electrically conductive blade pairs in a side by side generally parallel relationship. Blades in the plurality of blade pairs are configured to be longitudinally slidable with respect to each other. The block also includes at least one elastomer configured to retain the plurality of blade pairs. Each blade pair of the plurality of blade pairs includes a first blade (or a first blade assembly) and a second blade. The first blade (or the first blade assembly) and the second blade are configured to generate scrubbing motions when the device under test is being pressed down on the compliant ground block or is being released from the compliant ground block.

Abstract: In one embodiment, an apparatus includes a bi-directional coupler for coupling an upstream signal and a downstream signal to a termination load. A test point detection mechanism is configured to detect when a test point device is inserted in a test point connector. The test point device is configured to perform a test of the upstream signal or the downstream signal. A switch is configured to switch from being coupled to the termination load to being coupled to the test point device when the test point device is detected as being inserted in the test point connector. The switch is configured to switch from being coupled to being coupled to the test point device to the termination load when the test point device is detected as being removed from being inserted in the test point connector.

Abstract: The inventive concepts provide a magnetic property measurement apparatus capable of quickly measuring a magnetic property of a subject without a decrease in a measurement speed that might occur due to an electromagnet. In addition, the inventive concepts provide a magnetic property measurement apparatus capable of monitoring a magnetization distribution of a memory device as an image and integrating images by using a TDI camera, thereby being capable of performing highly sensitive measurement and not having to capture images for a long time. The magnetic property measurement apparatus includes: a magnetic field generation unit configured to generate a magnetic field which is constant with time and varies with relative position; a mobile unit configured to move a subject to be measured in the magnetic field; and a measurement unit configured to measure a magnetic property of the subject moving in the magnetic field.

Abstract: A current sensor system for measuring an AC electrical current, includes: a busbar having a beam shaped portion having a length and a width; a sensor device comprising two sensor elements spaced apart from each other in the width direction of the beam shaped portion. The sensor device is configured for measuring a magnetic field difference or a magnetic field gradient, and for determining the AC current based on said difference or gradient.

Abstract: The present disclosure provides techniques for using opto-isolator circuitry to control switching circuitry configured to be coupled to a radio-frequency (RF) coil of a magnetic resonance imaging (MRI) system. In some embodiments, opto-isolator circuitry described herein may be configured to galvanically isolate switch controllers of the MRI system from the switching circuitry and/or provide feedback across an isolation barrier. Some embodiments provide an apparatus including switching circuitry configured to be coupled to an RF coil of an MRI system and a drive circuit that includes opto-isolator circuitry configured to control the switching circuitry. Some embodiments provide an MRI system that includes an RF coil configured to, when operated, transmit and/or receive RF signals to and/or from a field of view of the MRI system, switching circuitry coupled to the RF coil, and a drive circuit that includes opto-isolator circuitry configured to control the switching circuitry.

Abstract: Systems, apparatuses, and methods are described for a transformer supporting two or more sets of windings electrically connected to different voltage levels. Use of stress control materials or composite materials (comprising a matrix and filler) may direct electrical fields caused by the different voltage levels to have a lowered electrical field amplitude.

Abstract: A method for monitoring a power line that carries electrical current, using a mobile inspection device, the mobile inspection device has a magnetic sensor and a camera, the method includes the following steps: measuring a magnetic field generated by the current, by the magnetic sensor; and capturing an image of the power line by the camera according to the measured magnetic field. A mobile inspection device, a computer program and a machine-readable storage medium implement the method.

Abstract: A semiconductor die includes: a SiC substrate; power and current sense transistors integrated in the substrate such that the current sense transistor mirrors current flow in the main power transistor; a gate terminal electrically connected to gate electrodes of both transistors; a drain terminal electrically connected to a drain region in the substrate and which is common to both transistors; a source terminal electrically connected to source and body regions of the power transistor; a dual mode sense terminal; and a doped resistor region in the substrate between the transistors. The dual mode sense terminal is electrically connected to source and body regions of the current sense transistor. The doped resistor region has a same conductivity type as the body regions of both transistors and is configured as a temperature sense resistor that electrically connects the source terminal to the dual mode sense terminal.

Abstract: A speed sensor assembly (114) includes a printed circuit board (PCB) (120) having a first main side and a second main side, a magnet (116) directly coupled to the first main side of the PCB (120), a sensor (118) electrically connected to the PCB (120), and a pole piece (125) directly coupled to the magnet (116) and to the sensor (118), wherein the magnet (116) includes a slot partially enclosed by the pole piece (125). The speed sensor assembly (114) including a slotted magnet (116) to reduce magnetic field amplitude for single sensing element hall effect sensor applications. The speed sensor assemblies (114) operate with both minimum and maximum air gaps.

Abstract: A flow cell assembly for use in NMR measurements on a liquid NMR sample in an NMR spectrometer has a cylindrical flow cell for receiving the NMR sample, with a first opening at a first end and a second opening at a second end, and a connecting piece arranged at the first opening for connecting a flow line to the flow cell in a fluid-tight manner. An opening diameter dop of the first opening is smaller than an inner flow cell diameter din, and a sealing head of the connecting piece is arranged in the first opening, with a sealing head diameter dseal larger than dop. For NMR measurements, the flow cell assembly is modified in such a way that the flow lines can be easily exchanged, and high-quality NMR flow measurements can be carried out independently of the orientation of the magnetic field in the NMR spectrometer.

Abstract: A system for detecting the formation of a crack in a metal joint includes an electrochemical electrical current detection device. Carrier material surrounds the metal joint, at least partially, with conductive media having electrolyte therein. An auxiliary electrode is in electrical contact with the carrier material. The placement of the auxiliary electrode in electrical contact with carrier material forms a passive layer on the metal joint. The formation of a crack in the metal joint ruptures the passive layer to generate a current for detection by the electrochemical electrical current detection device.

Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.

Abstract: A system comprises a noise generator circuit and a noise envelope detector circuit. The noise generator circuit comprises a first amplifier including a single transistor pair that is operable to generate 1/f noise, an output amplifier coupled to the first amplifier and configured to generate a 1/f noise signal as a function of the 1/f noise. The noise envelope detector circuit comprises a low pass filter operable to pass low frequency signals of the 1/f noise signal as a filtered 1/f noise signal, and a second amplifier or a comparator coupled to the low pass filter and operable to output a direct current (DC) voltage signal according to an envelope of the filtered 1/f noise signal, where the DC voltage signal is a function of an envelope of the filtered 1/f noise signal.

Abstract: A non-transitory computer-readable medium storing a program that causes a computer to execute a process including, calculating, for each of a plurality of groups each of which is a combination of two power distribution lines selected from a plurality of power distribution lines, an index value that indicates a correlation between time-series data of a sum of line currents that flow through the two power distribution lines included in a group and time-series data of consumed power consumed by at least one consuming subject coupled to a transformer coupled to any one of phases that corresponds to combinations of two of the plurality of power distribution lines or current that corresponds to the power; and determining that a phase that corresponds to the group that corresponds to the index value indicating a highest correlation among the plurality of groups is a connection phase to which the transformer is coupled.

Abstract: A magnetic resonance imaging apparatus includes a T/R switch. The T/R switch includes a double sided microstripline based hybrid couplers with a top side and a bottom side each including two concentric microstripline based hybrid couplers. Each of the two concentric microstripline based hybrid couplers includes an inner microstripline based hybrid coupler and an outer microstripline based hybrid coupler. The inner microstripline based hybrid coupler forms an inner loop of the two concentric microstripline based hybrid couplers and the outer microstripline based hybrid coupler forms an outer loop. In a transmission mode, the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side of the dual-tuned T/R switch are activated. In a receiving mode the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side and at the bottom side of the dual-tuned T/R switch are activated.

Abstract: This disclosure relates to systems and methods for current source temperature compensation for use during cryogenic electronic testing. A temperature compensation circuit can provide a temperature compensation signal to a current source circuit configured to provide an electrical current for testing a cryogenic device under test to compensate for temperature effects on the current source circuit based on a time constant adjustment signal. The time constant adjustment signal can adjust a time constant of the temperature compensation circuit to delay by a given amount of time that the temperature compensation circuit compensates for the temperature effects on the current source circuit. A controller can be configured to execute a temperature compensation method to provide the time constant adjustment signal based on at least one temperature signal characterizing a temperature of an environment that includes the current source circuit or a temperature of the current source circuit.

Abstract: A fan fault detection device includes: a plurality of sub-modules; and a master module to configured to determine faults of a plurality of fans, wherein each of the plurality of sub-modules includes: a first input terminal for receiving a detection signal indicating whether a corresponding fan is defective; a second input terminal; an output terminal; a switching circuit connected between the output terminal and a first power source for supplying a voltage signal corresponding to a state signal and, the switching circuit configured to switch an output of the state signal through the output terminal according to the detection signal; and a first signal transmission circuit connected between the first input terminal and the switching circuit, the first signal transmission circuit configured to transmit the detection signal to the switching circuit according to a signal received by the second input terminal.

Abstract: Embodiments of the present disclosure provide an antenna assembly for a test system. The antenna assembly includes a feedthrough part, two waveguide inputs, a single waveguide output as well as a multiplexing part that is interconnected between the two waveguide inputs and the single waveguide output. The multiplexing part is integrated within the feedthrough part at least partially. Moreover, embodiments of the present disclosure provide a test system and a method of establishing a test system for testing a device under test.

Abstract: A system and method is provided for measuring a voltage drop at a node. In embodiments, a circuit includes an analog-to-digital converter, a current sink, and a controller. The input of the analog-to-digital converter and the input of the current sink is coupled to the node to be measured. A set point for the current sink is determined. The output of the analog-to-digital converter during the voltage drop is sampled. And a relative voltage drop value is computed by subtracting the sampled output of the analog-to-digital converter during the voltage drop from a sampled output of the analog-to-digital converter during a steady-state condition. The current sink operating at the set point during the steady-state condition and during the voltage drop.