Patents

Thomas E. McEwan
Time-of-Flight Radio Location System
U.S. Patent 5,661,490
August 26, 1997
An apparatus for measuring the time of flight of an electromagnetic pulse. A transmitter transmits a sequence of electromagnetic pulses in response to a transmit timing signal, and a receiver samples the sequence of electromagnetic pulses with controlled timing in response to a receive timing signal and generates a sample signal. A timing circuit supplies the transmit and receive timing signals. The receive timing signal causes the sampling by the receiver to sweep over a range of delays. An envelope detector converts the sample signal to a unipolar signal to eliminate effects of antenna-orientation mismatch. The envelope detector is an absolute-value circuit followed by a low-pass filter. A sample detection circuit indicates time of flight, from which the position of an electromagnetic pulse can be obtained.

Anthony M. McCarthy
Method for Fabricating Transistors Using Crystalline Silicon Devices on Glass
U.S. Patent 5,663,078
September 2, 1997
A method for fabricating transistors on glass that overcomes the potential damage that may be caused during high-voltage bonding. A multilayer structure is formed on a silicon substrate and employs a metal layer that may be incorporated as part of the transistor. When the structure is bonded to a glass substrate, the voltage and current, because of the metal layer, pass through areas where transistors will not be fabricated. After removal of the silicon substrate, more metal may be deposited to form electrical contact or add functionality to the devices. By this method, both single and gate-all-around devices may be formed.


Stephen A. Payne and Joseph S. Hayden
Ultrafast Pulsed Laser Utilizing Broad Bandwidth Laser Glass
U.S. Patent 5,663,972
September 2, 1997
An ultrafast laser that uses a neodymium-doped phosphate laser glass characterized by a particularly broad emission bandwidth to generate the shortest possible output pulses. The laser glass is composed primarily of phosphate (P2O5), alumina (Al2O3), and magnesium oxide (MgO) and possesses physical and thermal properties that are compatible with standard melting and manufacturing methods. The emission bandwidth is greater than 29 nanometers and more, preferably greater than 30.5 nanometers. The broad-bandwidth laser glass can be used in mode-locked oscillators as well as in amplifier modules.


Chuen-Tsai Sun, Jyh-Shing Jang, and Chi-Yung Fu
Intelligent System for Automatic Feature Detection and Selection or Identification
U.S. Patent 5,664,066
September 2, 1997
A neural network that uses a fuzzy membership function, the parameters of which are adaptive during the training process, to parameterize the interconnection weights between layers of the network. As in a conventional neural network, each node in each level, except the input level, produces an output value. In a conventional neural network, all of the connection weights are adjustable and must be "trained." To reduce the number of parameters that need to be adjusted, a fuzzy membership function is used to define the interconnection weights between two of these layers. A tremendous reduction in the number of parameters for training is achieved because the field of connection weights being input to a node has been parameterized.


Daniel M. Makowiecki and Alan F. Jankowski
Boron Containing Multilayer Coatings and Method of Fabrication
U.S. Patent 5,670,252
September 23, 1997
The production of multilayers containing thin boron, cubic boron nitride, or boron carbide films or coatings. The boron-containing multilayers may be deposited as hard coatings on surfaces, such as on tools or engine parts, and contain no morphological growth features. By alternating the formation of boron films or cubic boron nitride and boron carbide films, a multilayer boron/boron carbide, cubic boron nitride/boron carbide, or a boron/cubic boron nitride/boron carbide film or coating may be produced. The various layers of the multilayer may be diffused, blended, or graded to contain from 0 to 100% boron or cubic boron nitride or boron carbide, and the interfaces of the layers may be discrete or diffused.


John M. Gonsalves
Pendulum Detector Testing Device
U.S. Patent 5,672,807
September 30, 1997
A testing device composed of several pieces of polyvinyl chloride tubing or pipe attached to a plastic holder. The test object, such as a weapon encapsulated in a protective cover, is secured in the holder. The holder and enclosed weapon are mounted in and swing through the archway of a walk-through detector system in a pendulum motion for any designated number of passes needed to complete the test. The components of the test device can be easily assembled and positioned in various locations of the detector facility archway, thereby simulating where the contraband might be concealed on a person walking through the detector system. The response of the detector system is observed.


Joseph R. Kimbrough and Nicholas J. Colella
System Level Latchup Mitigation for Single Event and Transient Radiation Effects on Electronics
U.S. Patent 5,672,918
September 30, 1997
A power bus connected to a microelectronic circuit that is radiation susceptible. An ionizing radiation pulse detector detects a pulse of ionizing radiation and provides, at an output terminal, a detection signal indicative of the detection of a pulse or ionizing radiation. A current sensor is coupled to the power bus for determining an occurrence of excess current through the power bus caused by ionizing radiation. The current sensor has an output terminal that provides a control signal indicative of the occurrence of excess current through the power bus caused by a latchup condition in a microelectronic circuit connected to the power bus.





Awards

Two teams of Laboratory employees received Hammer Awards from the National Performance Review in recent ceremonies in Washington, D.C. David Gutierrez, from the Electronics Engineering Department, and colleagues Kris Chubb and Pamela Harris, provided technical support for creating the U.S. Business Adviser Web site, which was designed to make government information relevant to small and large businesses easily accessible. Barbara Davis, former manager of the Information Technology and Security Center, worked with Joel Wong, Bill Silver, and Larry Moon to create a process for collecting and disseminating lessons learned in environmental management, worker safety, and health across the DOE complex. The Hammer Awards were created by Vice President Al Gore to recognize special achievements in the efforts to reinvent government by cutting red tape and making government more efficient.
Don Lesuer has been elected a Fellow of the American Society of Materials (ASM). A Laboratory employee for 20 years, Lesuer is a group leader in the Engineering Directorate's Manufacturing and Materials Engineering Division. He was honored "for outstanding contributions as an inventor and leader in mechanical metallurgy related to advanced metal-matrix composites, metal-laminated composites, hypereutectoid (or high-carbon) steels and superplasticity."
Physicist Seymour Sack is a 1997 recipient of the Fleet Ballistic Missile Achievement Award from the U.S. Navy's Strategic Systems Program. The annual award recognizes significant contributions in science and engineering "which have been pivotal to the success of the Fleet Ballistic Missile Strategic Weapons Systems." Sack, who retired in 1990 and is currently a Laboratory associate, was nominated for the award by Laboratory Associate Director George Miller as "the preeminent designer of nuclear warhead primaries in the history of the U.S. nuclear weapons program." Sack joined the Laboratory in 1955 and, in 1973, won the prestigious E. O. Lawrence Award for his continuing influence at the Laboratory.
Back to January/February 1998