University of Texas System

Admittance Technologies, Inc.

International Business Machines Corporation

Lev Shuhatovich

Erik Steven Larson

Marc D Feldman

Jonathan Walker Valvano

John Anthony Pearce

John Porterfield

Raffaele Cetrulo

Kathryn Loeffler

Charles John Camp

John A Pearce

An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.

Low power apparatus and method to measure complex electrical admittance or impedance

A data storage system includes a controller, a hot spare storage device and a plurality of primary storage devices. The controller utilizes the hot spare storage device to mirror only a subset of each stripe of logical pages written across the data storage array, where the subset includes a logical page determined by a write input/output operation (IOP) policy. In response to receipt of a write IOP, the controller writes a stripe including a plurality of logical data pages and a logical data protection page across the plurality of primary storage devices and mirrors the logical page determined by the write IOP policy on the hot spare storage device. In response to a failure of a storage device among the plurality of primary storage devices, contents of the failed storage device not already mirrored on the hot spare storage device are rebuilt on the hot spare storage device.

Data storage system employing a hot spare to proactively store array data in absence of a failure or pre-failure event

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Houston, TX, United States of America

Lev Shuhatovich