Abstract: According to one embodiment, a radio frequency coil unit includes coil elements, first switching parts and second switching parts. The coil elements are arranged in a first direction and a second direction. Each of the first switching parts and each of the second switching parts are installed in a corresponding coil element of the coil elements and switch the corresponding coil element between an on state and an off state. At least two of the first switching parts are connected in series in the first direction by a first control signal line. At least two of the second switching parts are connected in series in the second direction by a second control signal line.

Abstract: Methods and systems for measuring degradation includes measuring an initial electrical characteristic of a test device in a ring oscillator that includes multiple oscillator stages, each having a delay stage and one or more fan-out devices, and a test stage having a delay stage and the test device. The ring oscillator is operated for a period of time. The electrical characteristic of the test device is measured after operating the ring oscillator. A level of degradation in the test device is determined using a processor based on the measurements of the electrical characteristic of the test device.

Abstract: A method for inspecting a constituent unit cell to be stacked in an all-solid secondary battery of the present disclosure includes (A) measuring an open-circuit voltage between the positive electrode and the negative electrode of a constituent unit cell before a short-circuiting step is performed, (B) temporarily short-circuiting the positive electrode and the negative electrode of the constituent unit cell, (C) measuring an open-circuit voltage between the positive electrode and the negative electrode of the constituent unit cell after a given time has elapsed since the end of step (B), and (D) judging the constituent unit cell to be unusable when the open-circuit voltage measured in step (C) is less than a threshold value. A method for manufacturing an all-solid secondary battery of the present disclosure includes stacking a plurality of constituent unit cells excluding constituent unit cells judged to be unusable by the above inspection method.

Abstract: A microfluidic sensing device comprises a channel and an impedance sensor within the channel. The impedance sensor comprises a local ground and an electrode within the channel. The local ground and the electrode are to form an electric field region that is elongated along the channel.

Abstract: Systems and methods for monitoring microorganisms on a surface are provided. In particular, a flat, patterned sensing electrode can be positioned proximate a surface in non-contact relationship with the surface. The sensing electrode can include a working electrode and a counter electrode. The surface and the sensing electrode can be submerged in an aqueous medium. An alternating current signal can be applied at the working electrode. The signal can propagate through the aqueous medium and can be measured at the counter electrode. The presence of microorganisms on the surface can cause changes in the signal as the signal propagates through the aqueous medium. Such changes in the signal can be used to determine impedance parameters, which can correspond to microbial characteristics associated with the surface. For instance, the microbial characteristics can be associated with a biofilm, corrosion and/or bio-corrosion on the surface.

Abstract: Sensor devices and methods are provided where a test signal is applied to a capacitive sensor. Furthermore, a bias voltage is applied to the capacitive sensor via a high impedance component. A path for applying the test signal excludes the high impedance component. Using this testing signal, in some implementations a capacity imbalance of the capacitive sensor may be detected.

Abstract: While stripping an electrical cable in a stripping device of a cable-processing system, detection by an electrically conductive cutting device with a sensor circuit takes place if contact with a conductor occurs. By connecting the sensor circuit to the cutting device a measuring capacitance is developed. Before incising the electrical cable, a capacitance value of the measurement capacitance is determined during a first measurement cycle in which a charge equalization is carried out between the measurement capacitance and a reference capacitance. A parameter is determined in a further measurement cycle in which a charge equalization is again carried out between the measurement capacitance and the reference capacitance, wherein, relative to the first capacitance, the parameter displays a change in the capacitance after incising into the electrical cable. A signal is produced, if the change is greater than an established threshold value, indicating contact with the conductor.

Abstract: The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processor, and a memory that stores processor-executable instructions. When the instructions are executed by the processor, the instructions cause the processor to give a sample value to at least a part of sampling positions having no sample value in first k-space data so as to create a second k-space data, the first k-space data having a sample value at a part of sampling positions on a k-space. The instructions cause the processor to create a first image from the first k-space data and a second image from the second k-space data. The instructions cause the processor to derive weighting factors for the first image and the second image. The instructions cause the processor to calculate a magnetic resonance image by performing weighted addition using the weighting factors on the first image and the second image.

Abstract: A magnetic resonance imaging (MRI) system includes a plurality of transmitters to generate a parallel transmission radio frequency (RF) pulse, an array of coils coupled to the plurality of transmitters to apply the parallel transmission RF pulse to a subject, and a decoupling system connected to the plurality of transmitters and the array of coils. The decoupling system includes a plurality of hybrid couplers, each hybrid coupler of the plurality of hybrid couplers being coupled to a respective pair of the plurality of transmitters and to a respective pair of the array of coils. The plurality of hybrid couplers are configured to diagonalize an impedance matrix of the plurality of coils.

Abstract: Provided are a measurement apparatus and a measurement method capable of measuring inter-terminal capacitances of a three-terminal device while reproducibility is high and influences of residual inductances are cancelled. The measurement apparatus includes: a route selector including a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal, and a sixth terminal, the fourth to sixth terminals being configured to connect to any of the first to third terminals; an LCR meter; a device under test, which is a three-terminal device; first, second, and third cables for respectively connecting the fourth to sixth terminals of the first route selector and first, second, and third terminals of the device under test to each other; and fourth, fifth, and sixth cables for respectively connecting the first to third terminals of the first route selector and first, second, and third terminals of the LCR meter to each other.

Abstract: A current measuring device is disclosed, comprising: an electrically conductive coil having a first end and a second end; a first screen surrounding the coil and arranged to provide a current path from the second end of the coil to a location proximal to the first end of the coil; and a second screen surrounding the first screen and the coil.

Abstract: A gradient magnetic-field coil according to an embodiment includes multiple units of coil members and a connecting member. In each of the coil members, a coil pattern is formed with a first nonmagnetic metal. The connecting member connects the coil members with each other. Moreover, at least a part of the connecting member is formed with a second nonmagnetic metal that is different from the first nonmagnetic metal.

Abstract: In a method and apparatus for the correction of image data dynamically acquired with a magnetic resonance imaging method, a reliable B0 field map is recorded as a basic reference field map. Image data (VB) with distorted coordinates are also acquired over a predefined recording time. In addition, a set of distorted, dynamically obtained B0 field maps is acquired during the recording time. Incorrect B0 field maps are identified by comparison of the dynamically obtained B0 field maps with the basic reference field map, and the set of distorted, dynamically obtained B0 field maps is corrected accordingly. The acquired image data with distorted coordinates are corrected with the use of the corrected set of distorted, dynamically obtained B0 field maps.

Abstract: A continuous common mode trap assembly includes a central conductor and plural common mode traps. The central conductor has a length, and is configured to transmit a signal between a magnetic resonance imaging (MRI) receive coil and at least one processor of an MRI system. The plural common mode traps extend along at least a portion of the length of the central conductor. The common mode traps are disposed contiguously. The common mode traps are configured to provide an impedance to reduce transmitter driven currents of the MRI system.

Abstract: Methods and systems for sourcing and/or sinking current from power supplies of differing voltage levels. A driving circuit may, for example, receive power from first and second power supplies, where the first power supply provides current to the driving circuit at a first voltage level and the second power supply provides current to the driving circuit at a second voltage level, and where the first voltage is greater than the second voltage. As a result, the first power supply allows the driving circuit to provide current over a wide voltage range, and the second power supply allows the driving circuit to provide current at lower voltages with less power consumption.

Abstract: A monitoring system is applied to an electrical system, which includes a DC power source and an electrical apparatus that is connected to the DC power source by a pair of electric power leads incorporating respective switches. To detect leakage current from the DC power source, a low-frequency AC signal is applied via a large-capacitance capacitor to a specific connection position, between a first terminal of the DC power source and the corresponding switch, and the resultant voltage of that signal is measured. To detect a short-circuit failure of one or both of the switches, a high-frequency AC signal is applied via a low-capacitance capacitor to the specific connection position, and the resultant signal voltage is measured. Judgement as to occurrence of leakage current and/or short-circuit failure is based on the measured signal voltage values.

Abstract: A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.

Abstract: In a circuit board testing apparatus for performing a four-terminal measurement method on a wiring pattern formed of a plurality of wires on a circuit board, a control part connects in series contact probes to be connected to upstream-side voltage detection terminals or downstream-side voltage detection terminals, via connection terminals, allows a power supply part to apply power between the test points with which the contact probes connected in series are in contact, allows a voltage detection part to detect a voltage between the test points, and makes a determination as to conductive contact states of the contact probes with the test points, based on the detected voltage.

Abstract: A method for manufacturing a magnetism measurement device which measures a magnetic field generated from a living body, includes: arranging an ampoule made of borosilicate glass and having a hollow part filled with a solid alkali metal, in a void in a cell section made of quartz glass, and then sealing the cell section; and casting a pulse laser beam on the ampoule through the cell section and thus forming a penetration hole in the ampoule. The pulse laser beam has an energy of 20 ?J/pulse to 200 ?J/pulse. The absorption coefficient of quarts glass for the pulse laser beam is lower than the absorption coefficient of borosilicate glass for the pulse laser beam.