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Results 326–350 of 1,875

Differential emitter geolocation

Patent • #US9110147B1. An unknown location of a transmitter of interest is determined based on wireless signals transmitted by both the transmitter of interest and a reference transmitter positioned at a known location. The transmitted signals are received at a plurality of non-earthbound platforms each moving in a known manner, and phase...

Differential transimpedance amplifier circuit for correlated differential amplification

Patent • #US7403065B1. A differential transimpedance amplifier circuit for correlated differential amplification. The amplifier circuit increase electronic signal-to-noise ratios in charge detection circuits designed for the detection of very small quantities of electrical charge and/or very weak electromagnetic waves. A differential, integrating capacitive transimpedance amplifier integrated circuit comprising capacitor feedback loops performs...

Diffraction: Enhanced Light Absorption of Solar Cells and Photodetectors

Featured Opportunity • The solar and photovoltaic industry has grown steadily over the last several years.In order to maintain these growth rates, the processes and methods need to be continuously improved.Sandia National Laboratories has created a method for enhanced light absorption of solar cells and photodetectors in a narrowband or wideband spectral absorption....

Digital Communication

Featured Opportunity • Many communication systems employ multi-channels that transmit and receive a common signal. In these systems, the common signal is combined at thereceiver to achieve maximum channel capacity. During the combining of such signals the delay and phase parameters are estimated based on a convolution decoding operation and are removed from...

Digital twin advanced distribution management systems (ADMS) and methods

Patent • #US11881713B1. Advanced Distribution Management Systems not generally optimize over the entire feeder because there are few high-fidelity distribution circuit models and real-time distribution-connected sensors are rare. The limited observability at the distribution level makes it difficult to globally optimize distribution operations and issue control setpoints to power systems equipment or...

Diode and method of making the same

Patent • #US9917149B1. A diode includes a second semiconductor layer over a first semiconductor layer. The diode further includes a third semiconductor layer over the second semiconductor layer, where the third semiconductor layer includes a first semiconductor element over the second semiconductor layer. The third semiconductor layer additionally includes a second semiconductor...

Direct access inter-process shared memory

Patent • #US8566536B1. A technique for directly sharing physical memory between processes executing on processor cores is described. The technique includes loading a plurality of processes into the physical memory for execution on a corresponding plurality of processor cores sharing the physical memory. An address space is mapped to each of the...

Direct contact particle-fluid heat exchanger

Patent • #US11674757B1. The present disclosure is directed to systems and methods that transfer heat directly from hot particles to a cold fluid, such as sCO2, by bringing the hot particles and cold fluid into direct contact at the operating pressure of the cold fluid. These systems and methods can both stand-off...

Direct Detector for Terahertz Radiation

Featured Opportunity • A direct detector that is a depletion mode field-effect transistor built from heterostructures and consisting of electrical contacts and a grating-gate There has been much interest expressed in terahertz technology due to the diverse range of applications that it applies to. However, the terahertz components have been known to perform...

Direct formation of gold nanoparticles using ultrasound

Patent • #US10500643B2. The invention provides a green chemistry, aqueous method to synthesize gold nanoparticles directly from bulk gold sources. The method involves the ultrasonication of bulk gold in water in the presence of an alkythiol species and a quaternary ammonium surfactant. An organic bilayer forms on the surface of the gold...

Direct formation of metal nanoparticles using ultrasound

Patent • #US10518330B2. A method for creating nanoparticles directly from bulk metal by applying ultrasound to the surface in the presence of a two-part surfactant system. Implosive collapse of cavitation bubbles near the bulk metal surface generates powerful microjets, leading to material ejection. This liberated material is captured and stabilized by a...

Direct synthesis of calcium borohydride

Patent • #US7608233B1. A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Ca(BH4)2, from the alkaline earth metal hydride and the alkaline earth metal boride. The borohydride thus prepared is doped with a small portion of a metal chloride catalyst compound, such as RuCl3, TiCl3, or a mixture...

Direct synthesis of magnesium borohydride

Patent • #US8147788B1. A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Mg(BH4)2, from the alkaline earth metal boride MgB2 by hydrogenating the MgB2 at an elevated temperature and pressure. The boride may also be doped with small amounts of a metal chloride catalyst such as TiCl3 and/or...

Direct view zoom scope with single focal plane and adaptable reticle

Patent • #US9494787B1. A direct view telescopic sight includes objective lens, eyepiece, and prism erector assemblies. The objective lens assembly is mounted to receive light of an image from an object direction and direct the light along an optical path. The eyepiece assembly is mounted to receive the light along the optical...

Directional infrasound sensing

Patent • #US11287506B2. A method and apparatus for determining a direction of infrasound. Infrasound is received by a directional infrasound sensor comprising a plurality of channels and a plurality of sensor devices. Each channel in the plurality of channels comprises a single opening at a first end of the channel and a...

Dispersion of stored energy within a battery system at risk of failure

Patent • #US12255296B2. A method and system for dispersing stored energy in an energy storage system to delay or arrest propagation of thermal runaway and thermally-induced cascading failures. The system includes a plurality of battery sub-assemblies and DC-DC converters connected to a shared DC bus through which energy may be exchanged. The...

Dispersion of stored energy within a battery system at risk of failure

Patent • #US11855264B1. A method and system for dispersing stored energy in an energy storage system to delay or arrest propagation of thermal runaway and thermally-induced cascading failures. The system includes a plurality of battery sub-assemblies and DC-DC converters connected to a shared DC bus through which energy may be exchanged. The...

Disposable garment and donning system

Patent • #US11779143B2. A donning system allows a user to don disposable garments without contaminating the exterior of the garment. The disposable garment is part of a garment package, which also includes a cuff by which the garment is loaded into and dispensed from the donning system. The cuff includes elements whereby...

Disposable garment and donning system

Patent • #US10925424B2. A donning system allows a user to don disposable garments without contaminating the exterior of the garment. The disposable garment is part of a garment package, which also includes a cuff by which the garment is loaded into and dispensed from the donning system. The cuff includes elements whereby...

Doped luminescent materials and particle discrimination using same

Patent • #US8853651B2. Doped luminescent materials are provided for converting excited triplet states to radiative hybrid states. The doped materials may be used to conduct pulse shape discrimination (PSD) using luminescence generated by harvested excited triplet states. The doped materials may also be used to detect particles using spectral shape discrimination (SSD).

Doppler-assisted sensor fusion

Patent • #US10267895B1. Various technologies for identifying RF emitters in geolocation datasets are described herein. Doppler signatures of RF emitters and geolocation data of objects in a scene are collected simultaneously, then range-rate profiles of the movement of the RF emitters and the objects in the scene are computed. An RF emitter...

Double charge composite materials for contaminant removal and methods of making the same

Patent • #US11851350B1. A method for removing a contaminant from a fluid is provided. A positively charged layered double hydroxide is combined with a negatively charged clay material to form adsorption material. The adsorption material is contacted with an aqueous solution containing the contaminant to adsorb the contaminant onto the adsorption material.

Downhole to surface communications platform for drilling applications

Patent • #US11808144B1. A drilling assembly for downhole to surface communications is provided. The drilling assembly includes a series of pipe segments coupled in fluid communication between a slip ring assembly and an end pipe portion. The slip ring assembly is coupled in data and fluid communication with the pipe segments. A...

Downhole to surface communications platform for drilling applications

Patent • #US12378876B2. A drilling assembly for downhole to surface communications is provided. The drilling assembly includes a series of pipe segments coupled in fluid communication between a slip ring assembly and an end pipe portion. The slip ring assembly is coupled in data and fluid communication with the pipe segments. A...
Results 326–350 of 1,875