Abstract: A system and method for repartitioning data in a distributed network. The method may include executing, by one or more processors, a first pass of a data set from a plurality of first sources to a plurality of first sinks, each first sink collecting data from one or more of the first sources, and executing, by the one or more processors, a second pass of the data set from a plurality of second sources to a plurality of second sinks, each one of the plurality of first sinks corresponding to one of the plurality of second sources, and each second sink collecting data from one or more of the second sources. Executing the first and second passes causes the data set to be repartitioned such that one or more second sinks collect data that originated from two or more of the first sources.

Abstract: A drill burr includes a channel, extending along a longitudinal axis of the drill burr, and fluidically connected to a water reservoir for providing a constant-flow liquid jet. The constant-flow liquid jet has a first pressure directed at the bone along the longitudinal axis of the drill burr. A pressure sensor senses a pressure change in the liquid jet from the first pressure to a second pressure. A signal processing unit is configured to translate the pressure change into information indicating a structural change in the bone along the drilling path, from a first structure to a second structure, corresponding respectively to the first pressure and the second pressure. Optionally, the signal processing unit generates an audio alarm notifying of the structural changes.

Abstract: A drill burr includes a channel, extending along a longitudinal axis of the drill burr, and fluidically connected to a water reservoir for providing a constant-flow liquid jet. The constant-flow liquid jet has a first pressure directed at the bone along the longitudinal axis of the drill burr. A pressure sensor senses a pressure change in the liquid jet from the first pressure to a second pressure. A signal processing unit is configured to translate the pressure change into information indicating a structural change in the bone along the drilling path, from a first structure to a second structure, corresponding respectively to the first pressure and the second pressure. Optionally, the signal processing unit generates an audio alarm notifying of the structural changes.

Abstract: A mechanical ventilator for ventilating a patient employs an air displacement member mounted for oscillating motion in a chamber; preferably the chamber is semi-cylindrical and the air displacement member is a vane mounted for oscillating movement about an axis of rotation such that a free outer edge surface of the vane is maintained in closely spaced apart relationship with the interior wall of the chamber throughout the oscillating; the ventilator permits significant variation in the ventilation flow waveform.