| Tech ID |
Title |
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| 23280 |
System And Method For Capturing Vital Vascular Fingerprint
Improved reliability of fingerprint authentication is achieved through a unique vascular fingerprint which increases accuracy and verifies liveness.
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| 22931 |
Automatic Facial Expression Recognition System Using Emotion Avatar
Current facial recognition techniques are limited to analyzing the spatial and temporal information for every single frame of video. The inherent challenge for facial expression recognition and predicting human emotion is the dilemma between rigid motion of the head pose and the non-rigid motion of facial muscles. Current technology has a credible capacity to estimate head pose, however, difficulty arises estimating non-rigid motion of facial muscles with issues such as non-rigid morphing and person specific appearance.
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| 21065 |
Vector Magnetometer Based On Optical-Absorption Detection Of Ensembles Of Nitrogen-Vacancy Centers In Diamond
In the present geopolitical situation, timely and effective identification of security threats is of crucial importance; such identification should be conducted in a variety of environments, including airport and border security checks, unexploded landmine detection, and in-situ analysis of trace-quantity samples for chemical and biological threats. Among the solid-state devices for these purpose , the most sensitive sensors are based on Superconducting Quantum-Interference Devices (SQUID). However, important shortcomings of these devices include the necessity of cryogenic cooling as well as the absence of intrinsic absolute calibration of the field. An alternative to SQUIDs are atomic magnetometers, which, in recent years, have achieved performance comparable to or, in some cases, even exceeding that of the best SQUIDs. Unfortunately, due to spin-altering collisions, the sensitivity of atomic magnetometers tends to deteriorate at spatial scales smaller than a millimeter. To address this challenge, investigators at the University of California at Berkeley have developed a method for the detection of magnetic fields using the electron spin resonances of nitrogen-vacancy (NV) centers in diamond. This innovative magnetometer has the ability to measure all vector components of the magnetic field and can be operated over a wide range of temperatures—from 0 K to well above room temperature. The crux of the UC Berkeley invention is detection of the spin state of ensembles of NV centers using optical absorption at 1042 nm. Sensors based on this technique can achieve a sensitivity approaching 10 fT/rtHz for a 30 x 30 x 500 micron sensor with a bandwidth from DC to 1 MHz.
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| 20985 |
Ringer: A Program To Detect Molecular Motions By Automatic Electron Density Sampling
Ringer distinguishes flexible regions from rigid regions of biomolecules such as drug receptors. To assess the generality and significance of the weak secondary peaks of uniquely modeled residues, we ran Ringer on 402 high-resolution (<=1.5 Å) crystal structures from the Protein Data Bank. Omit electron-density maps were analyzed to reduce the effects of model bias. When applied after refinement is considered complete, Ringer discovers polymorphism at over 3.5 times the frequency that is currently modeled in the PDB. Multiple conformers are found for >18% of unbranched residues in a test set of 402 high-resolution structures, in addition to the 5.1% that are already modeled. More than a method for enhancing crystallographic refinement, however, Ringer is best used as a tool for systematically detecting low-occupancy structural features. The hidden conformational substates identified using Ringer provide clues to the functional roles of protein structural polymorphism and to assess the response of protein side chain distributions to perturbations including ligand binding, temperature changes and mutations. In calmodulin, for example, Ringer identifies side chains that undergo conformational population inversions and side-chain rigidification upon peptide binding, linking the structure to dynamic properties. Similarly, in human proline isomerase, Ringer was used to define the nature of a coupled conformational switch in the free-enzyme that defines motions that occur during turnover. In both cases, the alternate conformations identified by Ringer provided structural insights not available from any other experimental technique. Link to overview of Ringer software
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| 20597 |
A New Method for Automatic, Real-Time Face Detection and Expression Recognition
University researchers have invented a method for automatic, real-time face detection and expression recognition that is robust for unconstrained situations such as free human motion, varied facial expressions, and many other human and machine factors. The main application has been in human-robot and human-computer interactions, though security applications are also well within reach. Other applications include market surveys, psychological assessment, truth quantification, and automatic tutoring systems.
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| 20584 |
A Method for Gold Coating of Rare Earth Nano-Phosphors and Uses Thereof
Researchers at the University of California, Davis have developed novel core-shell architecture nanoparticles that consist of a gold shell and a phosphor core. These particles are developed using a simple, robust one pot water based technique to coat gold on rare-earth fluoride containing nanometer sized phosphors. The uncoated phosphors are white, while the gold coated phosphors have distinct reddish tints that arise from the surface plasmon resonance of the gold shell. The tunable visible color together with the phosphor emission offers numerous possible applications.
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