Abstract: Disclosed are a control method for a bidirectional DC converter, a control module for a bidirectional DC converter, a bidirectional DC converter, and a non-transitory computer-readable storage medium. The control method includes: determining an operating mode of the bidirectional DC converter according to an input voltage and an output voltage; respectively determining a duty cycle of a drive signal of the first switch transistor, a duty cycle of a drive signal of the second switch transistor, a duty cycle of a drive signal of the third switch transistor, and a duty cycle of a drive signal of the fourth switch transistor according to the operating mode of the bidirectional DC converter; and providing drive signals to gates of the first switch transistor, the second switch transistor, the third switch transistor and the fourth switch transistor respectively.

Abstract: Provided herein are methods of treating or preventing cancer in a subject in need thereof, the methods comprise administering to the subject in need thereof (a) one or more nucleic acids encoding an elephant p53 protein, an elephant LIF protein, and/or combinations thereof, or (b) one or more elephant p53 proteins, elephant LIF proteins, and/or combinations thereof. Also provided are pharmaceutical compositions comprising a pharmaceutically acceptable carrier and (a) one or more nucleic acids encoding an elephant p53 protein, an elephant LIF protein, and/or combinations thereof, or (b) one or more elephant p53 proteins, elephant LIF proteins, and/or combinations thereof.

Abstract: A ripple detection device and a ripple suppression device. The ripple detection device includes: a ripple sampling unit, at least two DC sampling units, and a digital signal processing unit; the ripple sampling unit outputs a first voltage signal at an output port of a non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit; the DC sampling unit outputs a first DC signal in a second voltage signal at a connected port of the non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit and blocks an AC signal in the second voltage signal to be output to the digital signal processing unit; the digital signal processing unit determines a ripple noise signal at the output port of the non-isolated DC/DC bidirectional energy conversion unit according to the first voltage signal and the first DC signal.

Abstract: Disclosed are a control method for a bidirectional DC converter, a control module for a bidirectional DC converter, a bidirectional DC converter, and a non-transitory computer-readable storage medium. The control method includes: determining an operating mode of the bidirectional DC converter according to an input voltage and an output voltage; respectively determining a duty cycle of a drive signal of the first switch transistor, a duty cycle of a drive signal of the second switch transistor, a duty cycle of a drive signal of the third switch transistor, and a duty cycle of a drive signal of the fourth switch transistor according to the operating mode of the bidirectional DC converter; and providing drive signals to gates of the first switch transistor, the second switch transistor, the third switch transistor and the fourth switch transistor respectively.

Abstract: A ripple detection device and a ripple suppression device. The ripple detection device includes: a ripple sampling unit, at least two DC sampling units, and a digital signal processing unit; the ripple sampling unit outputs a first voltage signal at an output port of a non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit; the DC sampling unit outputs a first DC signal in a second voltage signal at a connected port of the non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit and blocks an AC signal in the second voltage signal to be output to the digital signal processing unit; the digital signal processing unit determines a ripple noise signal at the output port of the non-isolated DC/DC bidirectional energy conversion unit according to the first voltage signal and the first DC signal.

Abstract: The present disclosure relates to multiple stage operations, and more particularly to systems and methods for performing second stage cementing operations with a stage tool. A stage tool comprises: a mandrel; an opening seat; a closing seat; a plurality of ports; a closing sleeve; and a packer element, wherein the opening seat is attached to an interior surface of the mandrel, wherein the closing seat is attached to the interior surface of the mandrel, wherein the plurality of ports is configured to allow fluid communication between the interior surface of the mandrel and an exterior surface of the mandrel, wherein the closing sleeve is disposed on the exterior surface of the mandrel and coupled to the closing seat, wherein the packer element is disposed on the exterior surface of the mandrel.

Abstract: A conductive paste is provided for forming conductive traces on substrates. The conductive paste includes a vehicle and conductive material. The vehicle includes a resin, a plasticizer, and a solvent in which the resin is dissolved. After application to a substrate, the conductive paste is cured at ambient temperature by evaporation of the solvent from the paste, to thereby form a conductive trace on the substrate. The conductive trace does not require a curing agent, and attains low resistivity within minutes of application to the substrate.

Abstract: The present disclosure relates to multiple stage operations, and more particularly to systems and methods for performing second stage cementing operations with a stage tool. A stage tool comprises: a mandrel; an opening seat; a closing seat; a plurality of ports; a closing sleeve; and a packer element, wherein the opening seat is attached to an interior surface of the mandrel, wherein the closing seat is attached to the interior surface of the mandrel, wherein the plurality of ports is configured to allow fluid communication between the interior surface of the mandrel and an exterior surface of the mandrel, wherein the closing sleeve is disposed on the exterior surface of the mandrel and coupled to the closing seat, wherein the packer element is disposed on the exterior surface of the mandrel.

Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.

Abstract: A method of determining thermal properties of a sample using differential scanning calorimetry (DSC), the method comprises injecting a first separation fluid, a sample plug, and a second separation fluid into a sample cell. The first separation fluid and the sample plug have a first separation interface, and the sample plug and the second fluid have a second separation interface. The method further comprises injecting a reference fluid into a reference cell, heating the sample cell and reference cell, and determining thermal properties of the sample using DSC analysis.

Abstract: Techniques are described for collecting sensor data associated with a wheelchair and, based on the sensor data, determining metric(s) for a user of the wheelchair. Sensor(s) attached to, or in proximity to, the wheelchair may collect sensor data describing the wheelchair and/or its component(s), such as location, velocity, acceleration, direction of movement, orientations (e.g., pitch, yaw, roll), angular velocity of wheels, angular acceleration of wheels, and so forth. The sensor data may be analyzed to determine (e.g., fitness) metrics such as a caloric burn rate, a metabolic burn rate, and/or power expenditure of the user while the user is employing the wheelchair to exercise or otherwise move. The metric(s) and/or sensor data may be presented to the user through a user interface on a smartphone, tablet computer, wearable computer, or other device, to enable the user to monitor fitness metric(s) during use of the wheelchair.

Abstract: A conductive paste is provided for forming conductive traces on substrates. The conductive paste includes a vehicle and conductive material. The vehicle includes a resin, a plasticizer, and a solvent in which the resin is dissolved. After application to a substrate, the conductive paste is cured at ambient temperature by evaporation of the solvent from the paste, to thereby form a conductive trace on the substrate. The conductive trace does not require a curing agent, and attains low resistivity within minutes of application to the substrate.

Abstract: A video recording system for a head safety device includes a microcontroller and an accelerometer mounted in the head safety device. The accelerometer is coupled to the microcontroller. A plurality of camera modules are mounted on the head safety device and coupled to the microcontroller. The camera modules are positioned facing outward to obtain images at different angles of an environment surrounding the head safety device. The microcontroller receives data from the accelerometer and automatically initiates video recording with the camera modules when movement of the head safety device, as sensed using the accelerometer, reaches or exceeds a selected movement threshold.

Abstract: A method of determining thermal properties of a sample using differential scanning calorimetry (DSC), the method comprises injecting a first separation fluid, a sample plug, and a second separation fluid into a sample cell. The first separation fluid and the sample plug have a first separation interface, and the sample plug and the second fluid have a second separation interface. The method further comprises injecting a reference fluid into a reference cell, heating the sample cell and reference cell, and determining thermal properties of the sample using DSC analysis.

Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.

Abstract: A dielectric coating material system for use in a single-sided back contact solar cell is disclosed. The material system serves to electrically isolate electrodes of opposite polarity types on the same side of a silicon-based solar call, and includes titanium and phosphorus.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for establishing a communication connection between a biowearable embedded circuit and a computing device associated with a user, wherein the biowearable embedded circuit is mounted to the user; obtaining atmospheric, motion, communication, and/or biometric data associated with the user; and providing the atmospheric, motion, communication, and/or biometric data to the computing device.

Abstract: Provided are spatially-annealed nanoparticle films. The films have one or more discrete regions that exhibit size-dependent properties. Also provided are methods of making the spatially-annealed nanoparticle films. The films can be used in, for example, light emitting applications (e.g., in light emitting diodes).