Prashant B. Thakore - Library PA John L. Coulter - Leechburg PA William D. Monaghan - Dravosburg PA
Assignee:
AEG Westinghouse Transportation Systems, Inc. - Pittsburgh PA
International Classification:
G06F 1100
US Classification:
36455101
Abstract:
A method and apparatus for on-line diagnostics, particularly for use in power circuits of a DC-DC converter is described. Signals are sensed at selected strategic test points in a circuit and compared with stored expected signals for those points under normal operating conditions. Whenever the signals sensed at the selected test points do not correlate with the corresponding expected signals, the sensed signal is compared with abnormal signals stored in the memory associated with known failure conditions for that test point. Whenever the sensed signal matches closely with a signal for a known failure condition, an indication of the particular failure is logged into memory. If the sensed signal does not match a known failure condition, an indication of an unknown failure condition is logged into memory. Failure information can later be retrieved by maintenance personnel at a convenient time or can be displayed on an operator's display during operation.
When "Unbroken" was published in 2010, it was an instant sensation, spending more than 180 weeks on the New York Times Best Seller list. A new script was written by Richard Lagravanese ("The Fisher King"); when he left to make "Beautiful Creatures," William Monaghan ("The Departed") came onboard. St
Dr. G. William Monaghan, senior research scientist with the Indiana Geological Survey, said he and his colleagues working on the investigation do not believe there is a public risk at other dunes in the region.
Date: Aug 15, 2014
Category: Sci/Tech
Source: Google
Decaying trees may be key to mysterious dune holes
Another study is planned at Mount Baldy in August, where G. William Monaghan, a senior research scientist at the Indiana Geological Survey at Indiana University, will use more advanced ground-penetrating radar and take core samples under the dunes surface to see what lies beneath. He also will use