METHOD AND SYSTEM FOR INFORMATION RETRIEVAL AND AGGREGATION FROM INFERRED USER REASONING
The visual analytic system enables information retrieval within large text collections. Typically, users have to directly and explicitly query information to retrieve it. With this system and process, the reasoning of the user is inferred from the user interaction they perform in a visual analytic tool, and the appropriate information to query, process, and visualize is systematically determined.
Method for Enhancement of Mass Resolution over a Limited Mass Range for Time-of-Fight Spectrometry
Regenerative Feedback Resonant Circuit
A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured.materials.
Device and Method for Enhanced Collection and Assay of Chemicals with High Surface Area Ceramic
An advanced SPME structure has been developed that surpasses the current standard in the capture of trace level vapor phase analytes. The novel SPME device uses a unique binding process to secure a nanoporous thin film of high surface area sorbent materials to a rigid wire support. Further, novel selective and highly affinitive surface chemistries can be installed onto the nanoporous silica for enhanced selectivity and capture of target analytes. This functionalization allowed for increased collection of the signal, specifically demonstrated for DNT 8x better then commercial SPME fibers for DNT. This device has value by lowering the detection limits of trace analytes while providing a far more robust field sampling unit than currently commercially available. By design, the improved SPME device fits into existing sampling and analytical testing equipment thereby reducing additional equipment costs. This invention has advantages over existing SPME samplers including: • Robust, use of metal wire solves the fragile issues associated with fused silica supports • Superior material, NPTF increase surface area and sorbent capacity o 10-5000x (Thickness and formulation dependent) • Can tailor chemistry to target analyte, amendable to full range of silane chemistries for functionalization • Stabilizes otherwise unstable materials used for capture
Method for selective detection of explosives in mass spectrometer or ion mobility spectrometer at parts-per-quadrillion level
A method for selective detection of volatile and non-volatile explosives in a mass spectrometer or ion mobility spectrometer at a parts-per-quadrillion level without preconcentration is disclosed. The method comprises the steps of ionizing a carrier gas with an ionization source to form reactant ions or reactant adduct ions comprising nitrate ions (NO3−); selectively reacting the reactant ions or reactant adduct ions with at least one volatile or non-volatile explosive analyte at a carrier gas pressure of at least about 100 Ton in a reaction region disposed between the ionization source and an ion detector, the reaction region having a length which provides a residence time (tr) for reactant ions therein of at least about 0.10 seconds, wherein the selective reaction yields product ions comprising reactant ions or reactant adduct ions that are selectively bound to the at least one explosive analyte when present therein; and detecting product ions with the ion detector to determine presence or absence of the at least one explosive analyte.
METHODS, SYSTEMS, AND COMPUTER-READABLE STORAGE MEDIA FOR ENHANCED PHASE-CONTRAST X-RAY IMAGING
This invention is a test object for phase contrast x-ray imaging, which is used to test that artifacts which may adversely affect the scatter measurement have been properly removed. The test object consists of three or more materials which are homogeneous, with no large density variations on length scales between 10 nm and 200 microns, and represent a range of atomic numbers. The materials are machined to a thickness suited to the energy of the x-rays used, such that 10-90% of the beam intensity is transmitted through the object. A phase contrast measurement is performed, with corrections for spurious signals due to spectral changes during attenuation, and the resulting scatter image of the test object will be consistent with background if the correction is successful.
Image Generation Systems and Image Generation Methods
The virtual retinal display projects an image of a digital display directly onto the retina of the observer, which is viewed with relaxed accomodation of the eye focused at infinity. Virtual retinal displays are not unknown and are a subject of current research and product development. However, all efforts known to us employ a single raster scanned beam. The invention proposes an alternative scanning method to increase the performance and simplify display design.
METHODS OF RESOLVING ARTIFACTS IN HADAMARD-TRANSFORMED DATA
Applying a Hadamard transform multiplexing scheme to an ion-mobility mass spectrometer improves the signal-to-noise ratio and duty cycle of the instrument. However, minor perturbations in the convolved data that do not perfectly align with the pseudo-random sequence (PRS) used to decode the data will cause periodic “echo” artifacts that lower the signal-to-noise ratio (SNR) and appear as noise in downstream processing of the data. A novel, general deterministic numerical analysis algorithm that discovers and eliminates periodic data artifacts based on knowledge of the deconvolution of the PRS has been developed that boosts the SNR. Any instrument that utilizes simplex matrices and the Hadamard transform can utilize this technique. This study determined that incorrectly decoded data exhibits a type of periodic symmetry about an axis of reflection corresponding to the encoding PRS, which the algorithm can utilize to remove the data artifacts. Knowledge of the true signal peaks that is derived from the encoded data allows for both artifacts and noise to be removed with high confidence, decreasing the likelihood of false identifications in subsequent data processing.