LLNL Home S&TR Home Subscribe to S&TR Send Us Your Comments S&TR Index
Spacer Gif


S&TR Staff

Spacer Gif











Patents

Rapid Process for Producing Transparent, Monolithic Porous Glass
Paul R. Coronado
U.S. Patent 6,998,102 B2
February 14, 2006
A process for making transparent porous glass monoliths from gels. The glass is produced much faster and in much larger sizes than present technology for making porous glass. The process reduces the cost of making large porous glass monoliths because (1) the process does not require solvent exchange nor additives to the gel to increase the drying rates, (2) only moderate temperatures and pressures are used so relatively inexpensive equipment is needed, and (3) net-shape glass monoliths can be used. The process depends on the use of temperature to control the partial pressure of the gel solvent in a closed vessel, resulting in controlled shrinking during drying.

System and Method for Characterizing Voiced Excitations of Speech and Acoustic Signals, Removing Acoustic Noise from Speech, and Synthesizing Speech
Greg C. Burnett, John F. Holzrichter, Lawrence C. Ng
U.S. Patent 6,999,924 B2
February 14, 2006
The present invention is a system and method for characterizing human (or animate) voiced excitation functions and acoustic signals, for removing unwanted acoustic noise that often occurs when a speaker uses a microphone in common environments, and for synthesizing personalized or modified human (or other animate) speech on command from a controller. A low-power electromagnetic (EM) sensor is used to detect the motions of windpipe tissues in the glottal region of the human speech system before, during, and after speech is produced by a user. From these tissue motion measurements, a voiced excitation function can be derived. Furthermore, the excitation function provides speech production information to enhance noise removal from human speech, and it enables accurate transfer functions of speech to be obtained. Previously stored excitation and transfer functions can be used for synthesizing personalized or modified human speech. Configurations of EM sensor and acoustic microphone systems are described to enhance noise cancellation and to enable multiple articulator measurements.

Conductive Inks for Metallization in Integrated Polymer Microsystems
James Courtney Davidson, Peter A. Krulevitch, Mariam N. Maghribi, William J. Benett, Julie K. Hamilton, Armando R. Tovar
U.S. Patent 7,005,179 B2
February 28, 2006
A system of metallization in an integrated polymer microsystem. A flexible polymer substrate is provided, and conductive ink is applied to the substrate. In one embodiment, the flexible polymer substrate is silicone. In another, it is poly(dimethylsiloxane).

Compact Catadioptric Imaging Spectrometer Utilizing Immersed Gratings
Scott A. Lerner
U.S. Patent 7,006,217 B2
February 28, 2006
This imaging spectrometer has an entrance slit for directing light, a lens that receives the light and reflects it, a grating that defracts the light back onto a lens that focuses the light, and a detector array that receives the focused light. In one embodiment, the grating has rulings immersed into a germanium surface.

Parallel Object-Oriented Decision Tree System
Chandrika Kamath, Erick Cantu-Paz
U.S. Patent 7,007,035 B2
February 28, 2006
This data-mining decision tree system uncovers patterns, associations, anomalies, and other statistically significant structures in data by reading and displaying data files and extracting relevant features for each of the objects. The system recognizes patterns among the objects based on object features by using a decision tree that reads the data, sorts the data if necessary, determines the best manner to split the data into subsets according to some criterion, and splits the data.

Boattail Plates with Non-Rectangular Geometries for Reducing Aerodynamic Base Drag of a Bluff Body in Ground Effect
Jason M. Ortega, Kambiz Sabari
U.S. Patent 7,008,004 B2
March 7, 2006
An apparatus for reducing the aerodynamic base drag of a bluff body having a leading end, a trailing end, a top surface, opposing left and right side surfaces, and a base surface at the trailing end substantially normal to a longitudinal centerline of the bluff body. The based surface is joined to (1) the left-side surface at a left trailing edge, (2) the right-side surface at a right trailing edge, and (3) the top surface at a top trailing edge. The apparatus includes left and right vertical boattail plates, which are orthogonally attached to the base surface of the bluff body and inwardly offset from the left and right trailing edges, respectively. This produces left and right vertical channels that generate, in a flow stream substantially parallel to the longitudinal centerline, respective left and right vertically aligned vortical structures. The left and right vertical boattail plates each have a plate width defined by a rear edge of the plate spaced from the base surface. Each plate also has a peak plate width at a location between top and bottom ends of the plate corresponding to a peak vortex of the respective vertically aligned vortical structures.

Optical Probe with Reference Fiber
Luiz B. Da Silva, Charles L. Chase
U.S. Patent 7,013,173 B2
March 14, 2006
This system for characterizing tissue includes steps for generating an emission signal, generating a reference signal, directing the emission signal to and from the tissue, directing the reference signal relative to the emission signal, and using the reference signal to compensate the emission signal. In one embodiment, compensation is provided for fluctuations in light delivery to the tip of the probe due to cable motion.

Imaging Spectrometer Utilizing Immersed Gratings with Accessible Entrance Slit
Michael P. Chrisp, Scott A. Lerner
U.S. Patent 7,016,037 B2
March 21, 2006
This compact imaging spectrometer includes an entrance slit, a catadioptric lens with a mirrored surface, a grating, and a detector array. The entrance slit directs light to the mirrored surface of the catadioptric lens. The mirrored surface then reflects the light back through the lens to the grating. The grating receives the light from the catadioptric lens and diffracts it to the lens away from the mirrored surface. The lens transmits the light and focuses it onto the detector array.

Near-Infrared Spectroscopic Tissue Imaging for Medical Applications
Stavros Demos, Michael C. Staggs
U.S. Patent 7,016,717 B2
March 21, 2006
Near-infrared imaging using elastic light scattering and tissue autofluorescence are explored for medical applications. The approach involves imaging using cross-polarized elastic light scattering and tissue autofluorescence in the near infrared coupled with image processing and interimage operations to differentiate human tissue components.

Speaker Verification System Using Acoustic Data and
Non-Acoustic Data

Todd J. Gable, Lawrence C. Ng, John F. Holzrichter, Greg C. Burnett
U.S. Patent 7,016,833 B2
March 21, 2006
A method and system for speech characterization. One embodiment includes a method for speaker verification that collects data from a speaker, wherein the data comprise acoustic and nonacoustic data. The data are used to generate a template that includes a first set of “template” parameters. The method further includes receiving a real-time identity claim from a claimant and using acoustic and nonacoustic data from the identity claim to generate a second set of parameters. The first set of parameters is compared to the second set to determine whether the claimant is the speaker. The two sets have at least one purely nonacoustic parameter, including a nonacoustic glottal shape parameter derived from averaging multiple glottal cycle waveforms.



Back | S&TR Home | LLNL Home | Help | Phone Book | Comments
Site designed and maintained by TID’s Internet Publishing Team

Lawrence Livermore National Laboratory
7000 East Avenue, Livermore, CA 94550-9234
S&TR Office: (925) 423-3432
Operated by the University of California for the U.S. Department of Energy

UCRL-52000-06-5 | May 10, 2006