Patent application number | Description | Published |
20110311078 | MICROSCALE IMPLEMENTATION OF A BIO-INSPIRED ACOUSTIC LOCALIZATION DEVICE - An apparatus and method for creating a MEMS directional sensor system capable of determining direction from at least two microphones to a sound source over a wide range of frequencies is disclosed. By utilizing a stiff beam stand-off architecture that relies on a unique manufacturing technique in a MEMS device, such as described herein, a very small set of microphones, on the order of a few micrometers, can be designed with unsurpassed ability to detect a sound source location. | 12-22-2011 |
20120174808 | SILICON-BASED EXPLOSIVE DEVICES AND METHODS OF MANUFACTURE - Silicon-based explosive devices and methods of manufacture are provided. In this regard, a representative method involves: providing a doped silicon substrate; depositing undoped silicon on a first side of the substrate; and infusing an oxidizer into an area bounded at least in part by the undoped silicon; wherein the undoped silicon limits an exothermic reaction of the doped silicon to the bounded area. Another representative method involves: providing a doped silicon substrate; depositing a masking layer of low-pressure chemical vapor deposited (LPCVD) Silicon nitride to the first side of the substrate; patterning the nitride mask and etching the porous silicon, and infusing oxidizer into an area bounded by the LPCVD nitride; wherein the silicon nitride limits an exothermic reaction of the doped silicon to the bounded area. | 07-12-2012 |
20130143330 | Energetic Material Reaction Characteristic Detector - A reaction characteristic detector comprising a ladder assembly including a plurality of rungs, where each rung in the plurality of rungs comprises a reaction passage determiner spaced a distance from a point of an energetic material reaction initiation. Each reaction passage determiner has at least one characteristic that is configured to change in response to the reaction occurring proximate to the reaction passage determiner. | 06-06-2013 |
20130149460 | GALVANIC POROUS SILOCON COMPOSITES FOR NANOENERGETICS AND MONOLITHICALLY INTEGRATED IGNITOR - Porous silicon (PS) films composed of pores with diameters less than 3 nm are fabricated using a galvanic etching approach that does not require an external power supply. A highly reactive, nanoenergetic composite is then created by impregnating the nanoscale pores with the strong oxidizer, sodium perchlorate (NaClO | 06-13-2013 |
20140076696 | THREE-AXIS ACCELERATION SWITCH ARRAY - An acceleration switch array having at least two acceleration switches. Each acceleration switch includes a substrate, an anchor attached to the substrate, an electrically conductive mass disposed around the anchor and secured to the anchor by a spring assembly which permits movement of the mass relative to the anchor, and a plurality of electrical contacts positioned at circumferentially spaced positions around and outwardly from the mass. These electrical contacts are aligned along at least one orthogonal axis. A resistor array is electrically connected between the electric contacts of each acceleration switch for each orthogonal axis so that, upon contact between the mass and any of the electrical contacts, an electrical resistance is presented at an output terminal that is unique for each electrical contact for each acceleration switch. | 03-20-2014 |
Patent application number | Description | Published |
20130044114 | Visual Representation of Data According to an Abstraction Hierarchy - Visual representations having visual nodes that can each show up to two levels of an abstraction hierarchy of data, extracted elements of the data, and/or categories thereof, with the optional ability to explode the data, the extracted elements, and/or the categories into additional visual nodes provide capability for deeper composition exploration. Relationships among the data, the extracted elements, and/or the categories can be represented via lines within and across visual nodes. The visual representation can provide an user with awareness of different attributes of the data, the extracted elements, and/or the categories in context even for large, complex corpora of data. The representations of the data, the extracted elements, and/or the categories in the visual representation can be sorted, can depict relative size or quantity across various attributes, and can provide insight into relationships based on metadata and/or content. | 02-21-2013 |
20140280909 | MULTI-DOMAIN SITUATIONAL AWARENESS FOR INFRASTRUCTURE MONITORING - Apparatus and methods are disclosed for a monitoring system that integrates multi-domain data from weather, power, cyber, and/or social media sources to greatly increase situation awareness and drive more accurate assessments of reliability, sustainability, and efficiency in infrastructure environments, such as power grids. In one example of the disclosed technology, a method includes receiving real-time data from two or more different domains relevant to an infrastructure system, aggregating the real-time data into a unified representation relevant to the infrastructure system, and providing the unified representation to one or more customizable graphical user interfaces. | 09-18-2014 |
20150242759 | METHOD OF GENERATING FEATURES OPTIMAL TO A DATASET AND CLASSIFIER - A method of generating features optimal to a particular dataset and classifier is disclosed. A dataset of messages is inputted and a classifier is selected. An algebra of features is encoded. Computable features that are capable of describing the dataset from the algebra of features are selected. Irredundant features that are optimal for the classifier and the dataset are selected. | 08-27-2015 |
Patent application number | Description | Published |
20090022196 | HIGH EFFICIENCY INTERSUBBAND SEMICONDUCTOR LASERS - An intersubband quantum cascade laser structure includes multiple coupled laser stages, wherein each stage has a multilayer structure including an electron injector, an active region with at least one quantum well, and an electron reflector. Electrons injected from the injector into the active region at a high energy level relax to a lower energy level with the emission of a photon at, for example, mid-infrared wavelengths. The reflector reflects electrons at the higher energy level at which they were injected and transmits electrons from the lower energy level after emission of a photon. Multiple layers of semiconductor are formed on each side of the multistage structure to provide conduction across the device and to provide optical confinement of the photons emitted. | 01-22-2009 |
20120201263 | HIGH-POWER QUANTUM CASCADE LASERS WITH ACTIVE-PHOTONIC-CRYSTAL STRUCTURE - Semiconductor laser array devices capable of emitting mid- to long-wavelength infrared (i.e., 4-12 μm) radiation are provided. The devices include a quantum cascade laser (QCL) structure comprising one or more active cores; an optical confinement structure; a cladding structure; and a plurality of laterally-spaced trench regions extending transversely through the optical confinement and cladding structures, and partially into the QCL structure. The trench regions, each of which comprises a lower trench layer comprising a semi-insulating material and an upper trench layer comprising a material having a refractive index that is higher than that of the semi-insulating material, define a plurality of laterally-spaced interelement regions separated by element regions in the laser array device. | 08-09-2012 |
20130107903 | QUANTUM CASCADE STRUCTURES ON METAMORPHIC BUFFER LAYER STRUCTURES | 05-02-2013 |
20140029634 | SEMICONDUCTOR MICROTUBE LASERS - Disclosed are semiconductor microtube lasers including a semiconductor multilayer heterostructure. The multilayer heterostructure includes a substantially cylindrical optically active structure capable of light emission when under the influence of an applied electromagnetic field and a substantially cylindrical distributed feedback grating structure configured to provide optical feedback for a selected wavelength of light from the optically active region and to produce lasing action from the microtube when under the influence of an applied electromagnetic field. | 01-30-2014 |
20140037258 | FABRICATION OF LOW-LOSS, LIGHT-WAVEGUIDING, ORIENTATION-PATTERNED SEMICONDUCTOR STRUCTURES - Methods for the fabrication of orientation-patterned semiconductor structures are provided. The structures are light-waveguiding structures for nonlinear frequency conversion. The structures are periodically poled semiconductor heterostructures comprising a series of material domains disposed in a periodically alternating arrangement along the optical propagation axis of the waveguide. The methods of fabricating the orientation-patterned structures utilize a series of surface planarization steps at intermediate stages of the heterostructure growth process to provide interlayer interfaces having extremely low roughnesses. | 02-06-2014 |
20140339505 | VIRTUAL SUBSTRATES BY HAVING THICK, HIGHLY RELAXED METAMORPHIC BUFFER LAYER STRUCTURES BY HYDRIDE VAPOR PHASE EPITAXY - Virtual substrates made by hydride vapor phase epitaxy are provided comprising a semiconductor growth substrate and a substantially strain-relaxed metamorphic buffer layer (MBL) structure comprising one or more layers of a semiconductor alloy on the growth substrate. The MBL structure is compositionally graded such that its lattice constant transitions from a lattice constant at the interface with the growth substrate that is substantially the same as the lattice constant of the growth substrate to a lattice constant at a surface opposite the interface that is different from the lattice constant of the growth substrate. The virtual substrates comprise relatively thick MBL structures (e.g., >20 μm) and relatively thick growth substrates (e.g., >0.5 mm) | 11-20-2014 |
20150162724 | SUBSTRATE-EMITTING TRANSVERSE MAGNETIC POLARIZED LASER EMPLOYING A METAL/SEMICONDUCTOR DISTRIBUTED FEEDBACK GRATING FOR SYMMETRIC-MODE OPERATION - Semiconductor lasers comprise a substrate; an active layer configured to generate transverse magnetic (TM) polarized light under an electrical bias; an upper cladding layer; a lower cladding layer; and a distributed feedback (DFB) grating defined by the interface of a layer of metal and a layer of semiconductor under the layer of metal, the interface periodically corrugated in the longitudinal direction of the laser with a periodicity of Λ | 06-11-2015 |
Patent application number | Description | Published |
20080275546 | Inhibitory cell adhesion surfaces - Textured nanostructured surfaces are described which are highly resistant to cell adhesion. Such surfaces on medical implants inhibit fibroblast adhesion particularly on titanium treated silicone. The surfaces can also be engineered so that other cell types, such as endothelial and osteoblast cells, show little if any tendency to attach to the surface in vivo. | 11-06-2008 |
20090287302 | Polymer coated spinulose metal surfaces - Spinulose surfaces such as titanium and zirconium can be coated with a range of polymers used to form thin, adherent polymer surface films. Selected polymer coatings are useful for use as biocompatible surfaces on implants, catheters, guidewires, stents and a variety of medical devices for in vivo applications. The polymer coatings can also be used to protect metal surfaces nanostructured with spinulose titanium or zirconium. | 11-19-2009 |
20110003172 | Spinulose Titanium Nanoparticulate Surfaces - Vapor plasma deposition of titanium (Ti) metal onto a substrate forms a structured surface that exhibits enhanced cell attachment properties. Initially deposited round nanoparticulate surface structures develop tentacles with a spine or thorn-like appearance upon continued deposition under special conditions. The density and size of the formed spinulose particles can be controlled by timing the deposition intervals. A significant increase in osteoblast, fibroblast and endothelial cell attachment is observed on Ti spinulose surfaces compared to attachment on nanoparticulate surfaces lacking spinulous nanostructure. | 01-06-2011 |