Abstract: A number n of Hall elements of a position detecting device output analog detection signals responsive to magnetism from a magnet of a piston. A number n of AD converters carry out analog to digital conversion to convert the analog detection signals into digital detection signals. A ladder circuit receives, as an n-bit digital signal, the digital detection signals output from a number n of magnetic detectors, and performs digital to analog conversion thereof into a single analog output signal. A control IC detects an approximate position of the piston on the basis of the single analog output signal that is input thereto.

Abstract: An electromagnetic impedance sensing device includes a substrate, a first patterned conductive layer, a second patterned conductive layer, a magneto-conductive wire and an encapsulation layer. The substrate has a surface and a trench extending into thereof. The first patterned conductive layer is formed on the surface, as well as a bottom and sidewalls of the trench. The magneto-conductive wire is disposed in the trench. The second patterned conductive layer extending across the trench and electrically in contact with the first patterned conductive layer is formed on the first patterned conductive layer to make the magneto-conductive wire sandwiched between the first and the second patterned conductive layers. The magneto-conductive wire is encapsulated by the encapsulation layer to make the magneto-conductive wire electrically isolated from the first and second patterned conductive layers.

Abstract: A method for in-situ measuring electrical properties of carbon nanotubes includes placing a first electrode in a chamber, wherein the first electrode defines a cavity. A growth substrate is suspend inside of the cavity, and a catalyst layer is located on the growth substrate. A measuring meter having a first terminal and a second terminal opposite to the first terminal is provided. The first terminal is electrically connected to the first electrode, and the second terminal is electrically connected to the growth substrate. A carbon source gas, a protective gas, and hydrogen are supplied to the cavity, to grow the carbon nanotubes on the catalyst layer. The electrical properties of the carbon nanotubes are obtained by the measuring meter.

Abstract: A probe test card for testing semiconductor devices includes a printed circuit board, a pair of electrically conductive probes extending towards one another and protruding away from the printed circuit board with a gap being disposed between ends of the pair of electrically conductive probes, and a coil affixed to and electrically connected to the printed circuit board and disposed directly over the gap. The probe test card is configured to generate a magnetic flux in the gap between the ends of the pair of electrically conductive probes upon the application of a current through the coil.

Abstract: A portable cooling system and apparatus for semiconductor device testing includes a free piston Stirling cooler. This eliminates the need for cumbersome remotely located equipment, such as a chillers, compressors, coolant storage equipment, hoses and hose connections. An electrical power line and an air supply line are routed from a head control unit to a portable system control unit. The head control unit is positioned by an adjustable frame structure to locate the Stirling cooler vertically directly over a semiconductor device under test. The head control unit includes a thermal adapter system, which is configured between the free piston Stirling cooler and the semiconductor device under test.

Abstract: A frequency agile gyrotron for use in combination with an NMR system is disclosed. The frequency agile gyrotron combined with EPR-NMR magic angle spinning resonators and cryogenic sample cooling may increase the sensitivity of solid state NMR with DNP.

Abstract: A voltage probe holster includes a support member disposed on a base. The support member defines a plurality of apertures sized to receive a plurality of single-ended probes having coaxial leads. Each of the apertures have a conductive periphery configured to conduct electricity from one of the coaxial leads such that a common ground loop through the support member and the base is formed and that differences in ground potential are reduced.

Abstract: A multi-capacitor liquid detection device and method(s) of use is described. Embodiments of the multi-capacitor liquid detection device can include at least two capacitors being separated by a predetermined height. The multi-capacitor liquid detection device can be implemented to detect and differentiate between different types of immiscible liquids by measuring and comparing a dielectric constant between two or more capacitors. The multi-capacitor liquid detection device can be implemented to determine if a false detection of a liquid has been made by one of the capacitors.

Abstract: Methods and systems to obtain and apply T2 preparatory radiofrequency (RF) pulse sequences for magnetic resonance imaging (MRI) are provided. The iterative methods may employ propagation of the magnetization state of the object being imaged and a comparison with a target magnetization state. The methods disclosed may be used to obtain MRI pulse sequences that may optimize T2 relaxation contrast. The produced RF pulse sequences may be robust to effects from inhomogeneity of the magnetic fields or other environmental or physiological perturbations.

Abstract: A magnetic resonance method and system are provided for generating real-time motion-corrected perfusion images based on pulsed arterial spin labeling (PASL) with a readout sequence such as a 3D gradient and spin echo (GRASE) image data acquisition block. The real-time motion correction is achieved by using a volumetric 3D EPI navigator that is provided during an intrinsic delay in the PASL sequence, which corrects for motion prospectively and does not extend the image data acquisition time as compared to a similar non-motion-corrected imaging procedure.

Abstract: An example method for downhole surveying and measuring may include positioning a first conformable sensor proximate to a downhole element. The first conformable sensor may include a flexible material, a transmitter coupled to the flexible material, and a receiver coupled to the flexible material. A response of the downhole element to a signal generated by the transmitter may be measured at the receiver. The response may be processed to determine a feature of the downhole element.

Abstract: A magnetic sensor includes a board, a magnetoresistance element group including first and second magnetoresistance elements disposed on the board, and a magnet group including a first magnet corresponding to the first magnetoresistance element and a second magnet corresponding to the second magnetoresistance element. This magnetic sensor can have a small size and high accuracy.

Abstract: A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include magnetic materials and are arranged to sandwich the busbar in a thickness direction of the busbar. The shield plates include a conductive shield plate including a conductive magnetic material and a non-conductive shield plate including a non-conductive magnetic material. The conductive shield plate includes a slit penetrating therethrough. The magnetic sensing element is arranged at a position where the magnetic sensing element overlaps the slits in the thickness direction and does not overlap the conductive shield plate in the thickness direction.

Abstract: In white matter tractography from magnetic resonance imaging, a mathematical representation of diffusion (e.g., fiber orientation distributions) is first estimated from the diffusion MR data. Fiber tracing is performed via deterministic or probabilistic tractography where the tract maps and brain regions from multiple atlases and/or templates can be used for seeding and/or as spatial constraints. Field map correction and/or denoising may improve the diffusion weighted imaging data used in tractography.

Abstract: The present disclosure provides a detection circuit and a method for detecting an abnormal interface coupling. The detection circuit includes: a power circuit; a first USB interface, including a first power wire and a first signal wire, in which a power end of the first power wire is coupled to the power circuit; a second USB interface, including a second power wire and a second signal wire, in which the second USB interface is coupled with the first USB interface, such that the second signal wire is coupled with the first signal wire; and a controller, configured to acquire a voltage difference between a voltage of the first power wire and a voltage of the second power wire, and to determine whether the interface coupling is abnormal according to the voltage difference.

Abstract: Some embodiments relate to power detector including a voltage sensor configured to detect a voltage of a load and a current sensor configured to detect a current of the load. The power detector also includes circuitry configured to introduce a phase delay between the detected voltage of the load and the detected current of the load, thereby producing a voltage measurement and a current measurement. The circuitry is also configured to multiply the voltage measurement and the current measurement.

Abstract: A magnetic resonance imaging (MRI) phantom includes an outer container that includes a first portion comprising a first wall; a second portion opposingly disposed to the first portion and sealingly engaged to the first portion, the second portion including a second wall; and an internal volume bounded by the first wall and the second wall, the internal volume being hollow and configured to receive a fluid; and a sample holder disposed in the internal volume of the outer container, wherein the MRI phantom is configured to maintain a constant temperature of the internal volume. A process for acquiring an MRI image includes providing an MRI; disposing a sample member in the sample holder; disposing a fluid in the MRI phantom; disposing the MRI phantom in an MRI device; achieving thermal equilibrium in the MRI phantom at a selected temperature; and subjecting the MRI phantom to MRI imaging at the selected temperature to acquire the MRI image of the sample.

Abstract: We disclose a circuit board that hosts at least first and second types of resistance sensors. The resistance of each sensor of the first type tends to increase, and the resistance of each sensor of the second type tends to decrease if the sensor is exposed to an aggressive environment. The circuit board also hosts a control circuit that operates to monitor respective resistances of the various resistance sensors and to process the digital values representing the resistances to estimate the working condition of one or more other electrical circuits located on the circuit board and/or in relatively close proximity to the circuit board in the corresponding equipment cabinet. The control circuit further operates to transmit out an appropriate alarm message if the estimated working condition is deemed unsatisfactory.

Abstract: A method for detecting rotor position for a single coil DC motor or 2-coil DC motor with non-parallel windings, with no need of Hall position sensor. The method comprises applying a first respectively second probe pulse for generating a first response pulse having a first direction or polarity and a second response pulse having a second direction or polarity. The probe pulses are adapted so they do not substantially move the rotor with respect to the stator, but affect the magnetic properties of the stator. By comparing the measured effects caused by the probe pulses, the initial position of the rotor with respect to the stator is determined. A method for start-up, a motor driver circuit, and a motor assembly comprising said motor and driver circuit are also provided.

Abstract: A device for sensing the electrical conductivity of a liquid, particularly that of the washing bath in a washing machine, including an electrically insulating supporting casing through which first and second electrodes intended to contact the washing bath extend to the outside, electrical power supply and signal acquisition and processing circuit devices housed at least in part in the supporting casing and coupled to the electrodes, and signal coupling and galvanic isolation devices, interposed between these circuit devices and the electrodes and also housed in the casing, and including at least a first and a second capacitor, each of which is interconnected in series between one of the electrodes and a corresponding terminal of the circuit.