Abstract: A pathogen detection and display system is configured to discover and display the location of substances of interest, particularly pathogens that can spread infection. The detection and display system can be used in healthcare facilities on surfaces, medical equipment and devices, patients, and staff, for example.

Abstract: An air interface plane (AIP) of a radio frequency (RF) aperture includes: a circuit board having a first side and a second side opposite the first side; and a matrix of tapered elements arranged on the first side of the circuit board and secured to the circuit board, the matrix of tapered elements cooperating to at least one of receive or transmit an over-the-air RF signal. Suitably, each tapered element of the matrix has: a central hub extending along a longitudinal axis from a hub base which is proximate to the first side of the circuit board to an apex of the tapered element which is distal from the first side of the first circuit board; and a plurality of arms extending from the central hub at the apex of the tapered element, each of the plurality of arms including a first portion that projects the arm radially away from the longitudinal axis and a second portion that projects the arm longitudinally toward the first side of the circuit board.

Abstract: An air interface plane (AIP) of a radio frequency (RF) aperture includes: a circuit board having a first side and a second side opposite the first side; and a matrix of tapered elements arranged on the first side of the circuit board and secured to the circuit board, the matrix of tapered elements cooperating to at least one of receive or transmit an over-the-air RF signal. Suitably, each tapered element of the matrix has: a central hub extending along a longitudinal axis from a hub base which is proximate to the first side of the circuit board to an apex of the tapered element which is distal from the first side of the first circuit board; and a plurality of arms extending from the central hub at the apex of the tapered element, each of the plurality of arms including a first portion that projects the arm radially away from the longitudinal axis and a second portion that projects the arm longitudinally toward the first side of the circuit board.

Abstract: Resistive heating systems are described that have alternating, concentric positive and negative electric leads coated by a thin resistive heating layer. The resistive heating system, especially when the coating is a CNT coating, exhibits excellent transmittance in the L, S, C, X, and/or Ku bands. The resistive heating system is well-suited for a radome, and the invention includes a transmitter system and/or receiver system, especially for radio or infrared transmissions. The invention also provides a polarizable resistive heating system having a comb-like structure of alternated or interdigitated positive and negative leads.

Abstract: An air interface plane (AIP) of a radio frequency (RF) aperture includes: a circuit board having a first side and a second side opposite the first side; and a matrix of tapered elements arranged on the first side of the circuit board and secured to the circuit board, the matrix of tapered elements cooperating to at least one of receive or transmit an over-the-air RF signal. Suitably, each tapered element of the matrix has: a central hub extending along a longitudinal axis from a hub base which is proximate to the first side of the circuit board to an apex of the tapered element which is distal from the first side of the first circuit board; and a plurality of arms extending from the central hub at the apex of the tapered element, each of the plurality of arms including a first portion that projects the arm radially away from the longitudinal axis and a second portion that projects the arm longitudinally toward the first side of the circuit board.

Abstract: A resistive heater system comprising a braided and flattened electrical lead connected to a heating blanket or coating at one end of the lead. The braided and flattened electrical lead comprises a folded-over section that forms an angle in the lead of 70 to 110°. The invention also includes an aircraft comprising the heater system. Nonlimiting examples of aircraft include helicopter, drone, and airplane.

Abstract: A lookup circuit evaluates hash functions that map keys to addresses in lookup tables. The circuit may include multiple hash function sub-circuits, each of which applies a respective hash function to an input key value, producing a hash value. Each hash function sub-circuit may multiply bit vectors representing key values by a sparse bit matrix and may add a constant bit vector to the results. The hash function sub-circuits may be constructed using odd-parity circuits that accept as inputs subsets of the bits of the bit vectors representing the key values. The sparse bit matrices may be chosen or generated so that there are at least twice as many 0-bits per row as 1-bits or there is an upper bound on the number of 1-bits per row. Using sparse bit matrices in the hash function sub-circuits may allow the lookup circuit to perform lookup operations with very low latency.

Abstract: A lookup circuit evaluates hash functions that map keys to addresses in lookup tables. The circuit includes multiple hash function sub-circuits, each of which applies a respective hash function to an input key, producing a hash value. Candidate pairs of hash functions to be implemented by the hash function sub-circuits may be generated and tested for suitability in hashing a particular collection of keys. The suitability testing may include computing hash value bit vectors by applying each hash function in a candidate pair to a given key, and determining (using a modified union-find type operation that organizes objects in each set as a directed graph whose root points to itself) whether the resulting hash value bit vectors belong to the same set. The union-find type operation may include a limited distance-from-root test, path compression, or exception handling for special cases, but not a rank test.

Abstract: A method for identifying the chemical species of various textural elements in a targeted region of tissue wherein a volume of interest (VOI) is selectively excited and a k-encode gradient pulse is applied to induce phase wrap to create a spatial encode for a specific k-value and orientation. The specific k-value is selected based on anticipated texture within the VOI. Multiple sequential samples of the NMR RF signal encoded with the specific k-value are recorded as signal data. The Fourier Transform of the acquired signal data is then taken, wherein for each k-encode, the signal recorded is indicative of the spatial frequency power density at that point in k-space. Each peak in the NMR spectrum is then evaluated, whereby the relative contribution to the texture of tissue in the VOI at a k-value for each chemical species is determined.

Abstract: A small area electrostatic aerosol collector combines electrostatic collection of aerosol particles and electrohydrodynamic spraying of fluid so that a sample collected electrostatically can have fluid applied thereto. The fluid may assist with disaggregation and/or desalinization of biological material collected onto a sample substrate. A controller associated with the collector may control an electrostatic charge device and a spraying device such that the charge device and spraying device may operate in alternating fashion, or the charge device and spraying device may operate simultaneously. Further, mechanical systems are provided, for the disaggregation of particulate clusters collected onto a sample substrate.

Abstract: A method for identifying the chemical species of various textural elements in a targeted region of tissue wherein a volume of interest (VOI) is selectively excited and a k-encode gradient pulse is applied to induce phase wrap to create a spatial encode for a specific k-value and orientation. The specific k-value is selected based on anticipated texture within the VOI. Multiple sequential samples of the NMR RF signal encoded with the specific k-value are recorded as signal data. The Fourier Transform of the acquired signal data is then taken, wherein for each k-encode, the signal recorded is indicative of the spatial frequency power density at that point in k-space. Each peak in the NMR spectrum is then evaluated, whereby the relative contribution to the texture of tissue in the VOI at a k-value for each chemical species is determined.

Abstract: A method of assessing a spatial frequency distribution within a sample comprising subjecting the sample to magnetic resonance excitation, receiving an echo signal from the sample while the sample is subjected to a magnetic field gradient, applying an invertible linear transform to the echo signal, identifying a region of interest in the transformed echo signal and deriving a corresponding window function, applying the window function (in the signal or transform domain) to the echo signal to remove echo signal coming from regions of the sample outside of the region of interest, and analyzing the one dimensional spatial frequency content in the windowed echo signal in order to access a one dimensional spatial frequency distribution within the region of interest within the sample without creating an image.

Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in-vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of selected values in k-space, with multiple successive acquisitions of individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.

Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in-vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of selected values in k-space, with multiple successive acquisitions of individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.

Abstract: A lookup circuit evaluates hash functions that map keys to addresses in lookup tables. The circuit may include multiple hash function sub-circuits, each of which applies a respective hash function to an input key value, producing a hash value. Each hash function sub-circuit may multiply bit vectors representing key values by a sparse bit matrix and may add a constant bit vector to the results. The hash function sub-circuits may be constructed using odd-parity circuits that accept as inputs subsets of the bits of the bit vectors representing the key values. The sparse bit matrices may be chosen or generated so that there are at least twice as many 0-bits per row as 1-bits or there is an upper bound on the number of 1-bits per row. Using sparse bit matrices in the hash function sub-circuits may allow the lookup circuit to perform lookup operations with very low latency.

Abstract: Hardware circuitry may evaluate minimal perfect hash functions mapping keys to addresses in lookup tables. The circuitry may include primary hash function sub-circuits that apply linear hash functions to input key values (using carry-free arithmetic) to produce primary hash values. Each sub-circuit may multiply bit vectors representing key values by a bit matrix and add a constant bit vector to the result. The circuitry may include a secondary hash function sub-circuit that generates secondary hash values by aggregating values associated with multiple primary hash values using signed, unsigned, or modular integer addition, or bit-wise XOR operations. Secondary hash values may be usable to access data values in the lookup table that are associated with particular input key values. The circuitry may determine the validity of input keys and may alter the configuration or contents of the lookup tables. The hash function sub-circuits may include programmable hash tables.

Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in-vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of selected values in k-space, with multiple successive acquisitions of individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.

Abstract: A lookup circuit evaluates hash functions that map keys to addresses in lookup tables. The circuit may include multiple hash function sub-circuits, each of which applies a respective hash function to an input key value, producing a hash value. Each hash function sub-circuit may multiply bit vectors representing key values by a sparse bit matrix and may add a constant bit vector to the results. The hash function sub-circuits may be constructed using odd-parity circuits that accept as inputs subsets of the bits of the bit vectors representing the key values. The sparse bit matrices may be chosen or generated so that there are at least twice as many 0-bits per row as 1-bits or there is an upper bound on the number of 1-bits per row. Using sparse bit matrices in the hash function sub-circuits may allow the lookup circuit to perform lookup operations with very low latency.

Abstract: The disclosed embodiments provide a method for acquiring MR data at resolutions down to tens of microns for application in in-vivo diagnosis and monitoring of pathology for which changes in fine tissue textures can be used as markers of disease onset and progression. Bone diseases, tumors, neurologic diseases, and diseases involving fibrotic growth and/or destruction are all target pathologies. Further the technique can be used in any biologic or physical system for which very high-resolution characterization of fine scale morphology is needed. The method provides rapid acquisition of selected values in k-space, with multiple successive acquisitions of individual k-values taken on a time scale on the order of microseconds, within a defined tissue volume, and subsequent combination of the multiple measurements in such a way as to maximize SNR.

Abstract: A small area electrostatic aerosol collector combines electrostatic collection of aerosol particles and electrohydrodynamic spraying of fluid so that a sample collected electrostatically can have fluid applied thereto. The fluid may assist with disaggregation and/or desalinization of biological material collected onto a sample substrate. A controller associated with the collector may control an electrostatic charge device and a spraying device such that the charge device and spraying device may operate in alternating fashion, or the charge device and spraying device may operate simultaneously. Further, mechanical systems are provided, for the disaggregation of particulate clusters collected onto a sample substrate.