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  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan
    Patent Number:
    US 8574470 B2
    Description:

    Method of joining a carbon-carbon composite piece 30 together with a metal insert 20, e.g. in the manufacture of aircraft brake discs 10. The method includes the steps of: providing a carbon-carbon composite piece 30 and a metal insert 20, wherein the metal insert 20 has a surface that is complementary to a surface of said carbon-carbon composite piece 30; providing a layer of a mixture of titanium powder and carbon powder on the first complementary mating surface; arranging the powder layer …

    Date Issued:
    2013-11-05
    Resource Type
    Patent
  • Inventor(s):
    John Simon, Debdeep Jena, Huili (Grace) Xing
    Patent Number:
    US 8835998 B2
    Description:

    A compositionally graded semiconductor device and a method of making same are disclosed that provides an efficient p-type doping for wide bandgap semiconductors by exploiting electronic polarization within the crystalline lattice. The compositional graded semiconductor graded device includes a graded heterojunction interface that exhibits a 3D bound polarization-induced sheet charge that spreads in accordance with .rho..sub..pi.(z)=-.gradient.P(z), where .rho..sub..pi.(z) is a volume charge d…

    Date Issued:
    2014-09-16
    Resource Type
    Patent
  • Inventor(s):
    Shramik Sengupta, Hsueh-Chia Chang
    Patent Number:
    US 8635028 B2
    Description:

    An improved system and method is provided for detecting viable bacteria in a suspension sample. A sample of a suspension in which bacterial presence is suspected is collected from a source and a portion of the sample transferred to a microfluidic unit. A series of analysis signals at different frequencies are applied to the sample portion. An impedance is measured via a signal analyzer for the sample portion for each of the analysis signals to define an impedance data set. An initial bulk cap…

    Date Issued:
    2014-01-21
    Resource Type
    Patent
  • Inventor(s):
    Berardi Sensale-Rodriguez, Huili (Grace) Xing, Rusen Yan, Michelle M. Kelly, Tian Fang, Debdeep Jena, Lei Liu
    Patent Number:
    US 8836446 B2
    Description:

    A wave amplitude modulator for modulating a transmitted electromagnetic wave includes one or multiple self-gated capacitively coupled pair(s) of electron layers such as semiconductor or semimetal layers. Two electrical contacts are placed to each layer of electrons of the self-gated pair(s), and a power source is electrically connected to them. The power source, by varying the voltage applied between layers of electrons, tunes the electron density thereof, thereby adjusting the optical conduc…

    Date Issued:
    2014-09-16
    Resource Type
    Patent
  • Inventor(s):
    Timothy C. Ovaert
    Patent Number:
    US 8919066 B2
    Description:

    An apparatus including an impact surface and a plurality of spaced apart stiffening columns extending from an underside of the flooring plate. The columns remain substantially rigid up to a predetermined critical pressure and then buckle as the pressure increases. The columns are at least partially surrounded by a resilient underlayment. Deflection stops may extend from the flooring plate to prevent over-buckling and/or permanent deformation of the stiffening columns. In some examples, the de…

    Date Issued:
    2014-12-30
    Resource Type
    Patent
  • Inventor(s):
    Zhou Yu, Evgeny Drapkin, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Kai Zeng, Jiang Hsieh, Brian E. Nett, Debashish Pal, Lin Fu, Guangzhi Cao, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 9020230 B2
    Description:

    A method for reconstructing an image of an object that includes a plurality of image elements. The method includes accessing image data associated with a plurality of image elements, and reconstructing an image of the object by optimizing an objective function, where the objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. The algorithm is composed of nested iterative loops, in which an inner loop iteratively optimizes an objective fun…

    Date Issued:
    2015-04-28
    Resource Type
    Patent
  • Inventor(s):
    Jason C. Hicks, Gregory T. Neumann
    Patent Number:
    US 8969599 B2
    Description:

    The invention provides a catalyst system for catalytic fast pyrolysis comprising a cerium-incorporated HZSM-5 zeolite (Catalyst 1), and methods of making and using the same. The invention also provides a process for reducing coke formation during catalytic fast pyrolysis of biomass using HZSM-5, wherein the process can include incorporating cerium into the HZSM-5 zeolite to produce Catalyst 1 prior to the catalytic fast pyrolysis.

    Date Issued:
    2015-03-03
    Resource Type
    Patent
  • Inventor(s):
    Manuel Koucouthakis, Douglas J. Steinke, Alexander Mukasyan, Jeremiah D. E. White
    Patent Number:
    US 9321692 B2
    Description:

    Production of pore-free carbon/carbon-silicon carbide composite materials with mechanical properties making them suitable for use in such applications as the production of aircraft landing system brake components including brake discs. The method includes: providing a porous carbon-carbon composite preform; surrounding the porous carbon-carbon composite preform with silicon powder to form an intermediate construct; applying a uniaxial load to the construct; applying direct electrical current …

    Date Issued:
    2016-04-26
    Resource Type
    Patent
  • Inventor(s):
    Behnam Sedighi, Michael Niemier, Xiaobo Sharon Hu, Joseph J. Nahas
    Patent Number:
    US 9362919 B1
    Description:

    A Boolean gate includes at least one symmetric tunneling field-effect transistor (SymFET) for low-power information processing. SymFETs are ideal for applications that demand low power and have moderate speed requirements, and demonstrate better dynamic energy efficiency than CMOS circuits. Negative differential resistance (NDR) behavior of SymFETs leads to hysteresis in inverters and buffers, and can be used to build simple Schmitt-triggers. Further, pseudo-SymFET loads may be utilized in ci…

    Date Issued:
    2016-06-07
    Resource Type
    Patent
  • Inventor(s):
    Mehul Patel, Thomas C. Corke, Alan B. Cain
    Patent Number:
    US 9541106 B1
    Description:

    The present invention relates to a method of designing or optimizing a control surface for use with plasma actuators for controlling an aircraft, missile, munition or automobile, and more particularly to controlling fluid flow across their surfaces or other surfaces using plasma actuators, which would benefit from such a method. The various embodiments provide the steps to increase the efficiency of aircraft, missiles, munitions and automobiles. The method of flow control also provides a mean…

    Date Issued:
    2017-01-10
    Resource Type
    Patent
  • Inventor(s):
    Ryan K. Roeder, Matthew J. Meagher, Robert J. Kane
    Patent Number:
    US 9550012 B2
    Description:

    The invention provides a novel composite bone graft system utilizing a porous collagen scaffold having a matrix impregnated with calcium phosphate particles and more than one bioactive agent, one of which is conjugated to the matrix. The graft system exhibits increased mechanical strength and osteogenic properties by providing sites for tissue attachment and propagation. The bioactive agents are delivered to the scaffold via different mechanisms to enable sequential and sustained release of t…

    Date Issued:
    2017-01-24
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Xue Rui, Somesh Srivastava, Ken D. Sauer, Lin Fu, Charles A. Bouman
    Patent Number:
    US 9261467 B2
    Description:

    A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and met…

    Date Issued:
    2016-02-16
    Resource Type
    Patent