Abstract: A shock sensor, comprising: a housing, wherein the housing is cylindrical, wherein the housing comprises: a first end; a second end; a central bore that traverses a length of the housing; and an internal cavity; a coil, wherein the coil is disposed about the central bore; at least two magnets, wherein the at least two magnets are disposed about the central bore; a spring, wherein the spring is a compression spring, wherein the spring is disposed within the housing, wherein the spring comprises a first end and a second end; and a metallic member, wherein the metallic member is disposed at the second end of the spring.

Abstract: A shock sensor, comprising: a housing, wherein the housing is cylindrical, wherein the housing comprises: a first end; a second end; a central bore that traverses a length of the housing; and an internal cavity; a coil, wherein the coil is disposed about the central bore; at least two magnets, wherein the at least two magnets are disposed about the central bore; a spring, wherein the spring is a compression spring, wherein the spring is disposed within the housing, wherein the spring comprises a first end and a second end; and a metallic member, wherein the metallic member is disposed at the second end of the spring.

Abstract: An isolation device, a control system, and a method are disclosed. An illustrative system is disclosed to include a first power domain in which a first emitter is disposed. The system further includes a third power domain in which a second emitter is disposed. The system also includes a second power domain in which a detector is disposed, where the second power domain is electrically isolated from both the first power domain and the third power domain, where the detector is configured to receive a first control signal from the first emitter as well as a second control signal from the second emitter and produce an output in response thereto that represents a combination of the first control signal and the second control signal.

Abstract: An isolation device, a control system, and a method are disclosed. An illustrative system is disclosed to include a first power domain in which a first emitter is disposed. The system further includes a third power domain in which a second emitter is disposed. The system also includes a second power domain in which a detector is disposed, where the second power domain is electrically isolated from both the first power domain and the third power domain, where the detector is configured to receive a first control signal from the first emitter as well as a second control signal from the second emitter and produce an output in response thereto that represents a combination of the first control signal and the second control signal.

Abstract: A digital telemetry system can be calibrated to improve data communication. A receiver can receive a modulated signal with a predetermined sequence of transmitted symbols. A processing device can be communicatively coupled to the receiver for jointly performing carrier phase synchronization and symbol-timing recovery on the modulated signal to determine a corrective phase offset and a corrective timing offset. The receiver can be calibrated to use the corrective phase offset and the corrective timing offset for demodulating a subsequently modulated signal. In additional or alternative aspects, a demodulator can demodulate the modulated signal and determine an amount of interference introduced to the modulated signal. A transmitter can transmit data based on the amount of interference to a modem that transmitted the modulated signal for use by the modem to dynamically adjust hit allocation of the subsequently modulated signal.

Abstract: A method and apparatus for generating a low distortion sinusoidal signal with controllable amplitude for use with downhole tools, such as an array laterolog. In preferred embodiment, a signal-generating digital-to-analog converter is provided to produce a sinusoidal or other waveform at full scale. An amplitude-controlling digital-to-analog converter provides a voltage reference for the signal-generating digital-to-analog converter. The tandem combination of two digital-to-analog converters allows the generation of low distortion signals, even at low amplitudes. The amplitude-controlling digital-to-analog converter is provided digital codes by the downhole tool system processor. A high-speed dedicated controller provides digital codes to the signal-generating digital-to-analog converter, which relieves the system processor from the intensive task of providing signal generating codes, thereby freeing processor bandwidth for other system tasks.

Abstract: An example electronics module for a downhole tool includes a power source that provides an operating voltage and a processor communicably coupled to the power source to receive the operating voltage. A timer is communicably coupled to the power source and the processor and includes a real-time clock, a diode, and a capacitor. The real-time clock is powered by a primary power supply provided by the operating voltage and a backup power supply provided by the capacitor as charged through the diode. The real-time clock is powered by the primary power supply during normal operation and powered by the backup power supply when the primary power supply fails.

Abstract: Systems, including methods, apparatus, and algorithms, for spectrally imaging a two-dimensional array of samples.

Abstract: A circuit for actuating a switch includes a conductive liquid switch comprising a conductive liquid droplet and a control processor configured to receive a switching signal and configured to provide at least one actuation pulse to the conductive liquid droplet to initiate movement of the conductive liquid droplet based on a duration of a time period between the switching signal and a preceding switching signal.

Abstract: Systems, including methods, apparatus, and algorithms, for spectrally imaging a two-dimensional array of samples.

Abstract: Systems, including methods, apparatus, and algorithms, for spectrally imaging a two-dimensional array of samples.

Abstract: The present disclosure relates to a method for sampling a fluid, such as air. As fluid flows through a device, a scrubbing liquid is positioned in a pattern to contact the fluid and constituents in the fluid are transferred to in the liquid.

Abstract: Methods of detecting targets in a sample are provided. Methods of quantitating targets in a sample are provided. Methods of determining the specificity of a first molecule for a second molecule are provided. Methods of detecting inhibitors or enhancers of an interaction between a first molecule and a second molecule are provided. Methods of measuring the affinity of two different molecules for a different third molecule are provided.

Abstract: Compositions and methods are provided for performing capillary electrophoresis using a composition comprising in combination in an aqueous buffered medium a coating polymer and a sieving polymer, where the sieving polymer is more hydrophilic than the coating polymer and is present in greater amount. Of particular interest are uncrosslinked acrylamide polymer mixtures for coating plastic channels and providing sieving for performing DNA separations in microfluidic devices. Polyacrylamide or N,N-dimethyl acrylamide is used with a N,N-dialkyl acrylamide copolymer, either separately or together for sieving and coating, serving as the medium in capillary electrophoresis DNA separations.

Abstract: Compositions and methods are provided for performing capillary electrophoresis using a composition comprising in combination in an aqueous buffered medium a coating polymer and a sieving polymer, where the sieving polymer is more hydrophilic than the coating polymer and is present in greater amount. Of particular interest are uncrosslinked acrylamide polymer mixtures for coating plastic channels and providing sieving for performing DNA separations in microfluidic devices. Polyacrylamide or N,N-dimethyl acrylamide is used with a N,N-dialkyl acrylamide copolymer, either separately or together for sieving and coating, serving as the medium in capillary electrophoresis DNA separations.