Abstract: An apparatus for controlling a downhole device in an oil, gas or water well includes an outer body, defining a central cavity extending along a longitudinal axis of the outer body; a first piston assembly arranged within the central cavity, the first piston assembly moveable along the longitudinal axis to switch the downhole device between different modes, a first seal arranged to seal between the first piston assembly and an inner wall of the central cavity; a first biasing member arranged to bias the first piston assembly in a first direction along the longitudinal axis; a second piston assembly arranged within the central cavity, spaced from the first piston assembly in a second direction along the longitudinal axis, the second direction opposite the first direction, a second seal arranged to seal between the second piston assembly and the inner wall of the central cavity; and a second biasing member arranged to bias the second piston assembly in the first direction.

Abstract: A torque reduction assembly for a drill string has a mandrel for connecting two sections of drill pipe, the mandrel comprising a first annular shoulder and a plurality of radial retention slots arranged circumferentially around an outer surface of the mandrel, including a first retention slot and a second retention slot; an outer sleeve for rotatably mounting on the mandrel; a retaining ring for retaining the outer sleeve between the retaining ring and the first annular shoulder, the retaining ring comprising a first aperture and a circumferential groove about an inner surface of the retaining ring, the first aperture aligned with the circumferential groove, the retaining ring being rotatable about the mandrel so as to progressively align the first aperture with each retention slot; a first retention element for locating in the first retention slot via the first aperture to axially fix the retaining ring relative to the mandrel such that the retaining ring is still rotatable about the mandrel; and a second re

Abstract: A torque reduction assembly for a drill string has a mandrel for connecting two sections of drill pipe, the mandrel comprising a first annular shoulder and a plurality of radial retention slots arranged circumferentially around an outer surface of the mandrel, including a first retention slot and a second retention slot; an outer sleeve for rotatably mounting on the mandrel; a retaining ring for retaining the outer sleeve between the retaining ring and the first annular shoulder, the retaining ring comprising a first aperture and a circumferential groove about an inner surface of the retaining ring, the first aperture aligned with the circumferential groove, the retaining ring being rotatable about the mandrel so as to progressively align the first aperture with each retention slot; a first retention element for locating in the first retention slot via the first aperture to axially fix the retaining ring relative to the mandrel such that the retaining ring is still rotatable about the mandrel; and a second re

Abstract: Digital predistortion (DPD) arrangements that use coding to differentiate between contributions from individual power amplifiers (PAs) is disclosed. When used with a phased antenna array having N antenna elements and N corresponding PAs, the arrangements may sequentially apply N codes to input signals provided to N PAs. Each code is a vector having N elements, where each element corresponds to a different PA in that the element is a complex gain applied to an input signal for the PA. Together, the N codes may be arranged as N rows or N columns of a matrix P. The disclosed arrangements may generate N feedback signals by applying the matrix P to a signal generated by a probe antenna element sensing wireless RF signals transmitted by the N antenna elements, and to update DPD coefficients based on the N feedback signals. The N codes may be either orthogonal or non-orthogonal.

Abstract: A rotary steerable tool is provided for use with a drilling apparatus. The rotary steerable tool includes at least a first portion that includes an outer housing, a rotary shaft extending through the outer housing, a drive clutch coupled to the rotary shaft, and a sensor coupled to the rotary shaft. The drive clutch is movable between an engaged configuration and a disengaged configuration. The sensor is configured to identify whether the drive clutch is in at least one of the engaged configuration and the disengaged configuration.

Abstract: A rotary steerable tool is provided for use with a drilling apparatus. The rotary steerable tool includes at least a first portion that includes an outer housing, a rotary shaft extending through the outer housing, a drive clutch coupled to the rotary shaft, and a sensor coupled to the rotary shaft. The drive clutch is movable between an engaged configuration and a disengaged configuration. The sensor is configured to identify whether the drive clutch is in at least one of the engaged configuration and the disengaged configuration.

Abstract: An air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator.

Abstract: Components of a CPAP or other patient ventilation apparatus have a remotely-readable identification tag encoded with component identification data. The flow generator controller 40 is programmed to receive data derived from the identification tag from a tag reader, and to adapt functions of the flow controller to coordinate with the component.

Abstract: The invention provides a method for inhibiting hemoprotein- and heme-induced lipid peroxidation, a method for identifying compositions that are effective to inhibit hemoprotein- or heme-induced lipid peroxidation, and methods of therapeutic use for those compounds.

Abstract: A new and distinct Echeveria cultivar named ‘Joey2’ is disclosed, characterized a multiple, self-initiating branching habit, strong, uniform leaf color over a wide temperature range and under low water stress. Additionally, the new variety produces a high number of flower stems, with the peak amount in spring. The new variety is an Echeveria, typically produced as a garden or container plant.

Abstract: A new and distinct Echeveria cultivar named ‘Joey1’ is disclosed, characterized a multiple, self-initiating branching habit, strong, uniform leaf color over a wide temperature range and under low water stress. Additionally, the new variety produces a high number of flower stems, with the peak amount in spring. The new variety is an Echeveria, typically produced as a garden or container plant.

Abstract: A new and distinct Echeveria plant named ‘MOBEc 69’ which is characterized by succulent foliage tightly held in a basal rosette, light blue-green foliage which is lightly margined red, and significantly delayed development of clonal offsets. The new variety has shown to be uniform and stable in the resulting generations from asexual propagation.