Abstract: Systems for performing computing operations in a power-reduced environment include a processor in communication with two data storage media and a non-grid-based power source, such as a solar, wind, or mechanical source. The first data storage is adapted for communication with a network, rapid receipt and transfer of data, and low power use, such as a flash drive. The second data storage is adapted for actuation to record and retrieve data, and to store data in a stationary state requiring no power, such as an optical disc drive. The first data storage medium can communicate data to and from a network, receive input, and provide output, while the second data storage medium can be used to archive stored data based on the actuation state thereof. To conserve power and improve integrity, signals can be transmitted as a complementary pair of signals, along two non-linear paths having overlapping and misaligned portions.

Abstract: Determining ill conditioning in square linear systems of equations is disclosed. Specifically, a method, system and computer program product for determining ill conditioning in square linear systems of equations is disclosed, the method including sampling condition numbers in the square linear systems of equations, and classifying the condition numbers sampled from the square linear systems of equations.

Abstract: Determining ill conditioning in square linear systems of equations is disclosed. Specifically, a method, system and computer program product for determining ill conditioning in square linear systems of equations is disclosed, the method including sampling condition numbers in the square linear systems of equations, and classifying the condition numbers sampled from the square linear systems of equations.

Abstract: Liquid is caused to circulate in a shallow tank which has an operational depth less than half the effective maximum distance across the tank. One wall 17 defines with another wall a corner 18 and a bubble curtain 19 is provided along the wall 17 adjacent the corner 18 which imparts to the liquid in the tank an upward vertical component of movement which is asymmetrical along the wall 17, causing greater vertical movement of liquid at said corner than at the other end of the wall. Liquid rising up the wall 17 moving away therefrom by reaction therewith will circulate with a horizontal component due to the asymmetrical arrangement of the bubble curtain. The invention can be applied to the separation of materials of different densities e.g. the separation of suspended solids or emulsified oils from waste water.