Abstract: Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.

Abstract: Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.

Abstract: Methods, systems, and apparatus for engaging a wireless communication device assembly to a housing. In one aspect including a wireless communication device assembly adapted to engage a knockout hole in a housing after removal of a knockout blank from the knockout hole, the wireless communication device assembly adapted to connect to the base unit and comprising: a housing engagement portion being of dimensions to at least substantially cover any uncovered portions of the knockout; a remote unit portion positioned outside of the housing when the wireless communication device assembly is engaged with the knockout hole, the remote unit portion having a remote unit surface distal from the housing engagement portion; and at least one of: an antenna device to receive wireless communications and a stimulating device that upon actuation of the stimulating device causes the base unit to perform one or more predefined operations.

Abstract: Methods, systems, and apparatus for engaging a wireless communication device assembly to a housing. In one aspect including a wireless communication device assembly adapted to engage a knockout hole in a housing after removal of a knockout blank from the knockout hole, the wireless communication device assembly adapted to connect to the base unit and comprising: a housing engagement portion being of dimensions to at least substantially cover any uncovered portions of the knockout; a remote unit portion positioned outside of the housing when the wireless communication device assembly is engaged with the knockout hole, the remote unit portion having a remote unit surface distal from the housing engagement portion; and at least one of: an antenna device to receive wireless communications and a stimulating device that upon actuation of the stimulating device causes the base unit to perform one or more predefined operations.

Abstract: The invention relates to fluorescence calibration devices and methods that can mimic skin and other tissues. A calibration device of the invention comprises at least one scattering layer, which is preferably non-fluorescent, and a second layer containing one or more fluorophore. Light passes through the scattering layer and excites the fluorophore. Light emitted from the fluorophore passes back though the scattering layer and into collecting optics, which can be measured and that measurement used to correct for instrument drift.

Abstract: A linkage device for a steam turbine stop valve includes a support member having a pair of transverse sections separated by a substantially vertical portion; a reciprocal stop valve stem fixed to one of the transverse sections, the stop valve stem extending substantially parallel to but laterally offset from the vertical portion; an actuator rod arranged in substantial axial alignment with the stop valve stem along a force line, one end of the actuator rod extending through a hole in the other of the transverse sections; and a multi link assembly extending between the stop valve stem and the actuator rod, including a first link pivotally secured at a first end to the one transverse section, and a second link pivotally secured at a first end to the actuator rod. Second ends of the first and second links are pivotally secured to each other by a pivot pin. A trip cylinder is utilized to move the pivot pin through the force line, causing the multi link assembly to collapse, thus permitting closure of the valve.

Abstract: A process and composition for drilling a well through shale formation in sea water with an aqueous drilling mud comprising a clay -- sea water slurry containing a potassium salt of lignosulfonate. The lignosulfonate is prepared by reaction of potassium hydroxide or a salt of sulfurous acid with spent sulfite liquor at elevated temperatures. A particularly effective drilling composition also contains hydroxy acids and up to 4%, based on total solids content of the lignosulfonate, of an iron complex.