Patents Assigned to University of Dayton
  • Patent number: 10885429
    Abstract: An analog neuromorphic circuit is disclosed having resistive memories that provide a resistance to an input voltage signal as the input voltage signal propagates through the resistive memories generating a first output voltage signal and to provide a resistance to a first error signal that propagates through the resistive memories generating a second output voltage signal. A comparator generates the first error signal that is representative of a difference between the first output voltage signal and the desired output signal and generates the first error signal so that the first error signal propagates back through the plurality of resistive memories. A resistance adjuster adjusts a resistance value associated with each resistive memory based on the first error signal and the second output voltage signal to decrease the difference between the first output voltage signal and the desired output signal.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: January 5, 2021
    Assignee: University of Dayton
    Inventors: Tarek M. Taha, Raqibul Hasan, Chris Yakopcic
  • Patent number: 10789528
    Abstract: An analog neuromorphic circuit is disclosed having resistive memories that provide a resistance to each corresponding input voltage signal. Input voltages are applied to the analog neuromorphic circuit. Each input voltage represents a vector value that is a non-binary value included in a vector that is incorporated into a dot-product operation with weighted matrix values included in a weighted matrix. A controller pairs each resistive memory with another resistive memory. The controller converts each pair of resistance values to a single non-binary value. Each single non-binary value is mapped to a weighted matrix value included in the weighted matrix that is incorporated into the dot-product operation with the vector values included in the vector. The controller generates dot-product operation values from the dot-product operation with the vector and the weighted matrix where each dot-product operation is a non-binary value.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: September 29, 2020
    Assignee: University of Dayton
    Inventors: Chris Yakopcic, Tarek M. Taha, Md Raqibul Hasan
  • Patent number: 10713332
    Abstract: Systems and methods for finding the solution to a system of linear equations include use of a reconfigurable hardware based real-time computational solver. The solver apparatus solves systems of linear equations by applying Gauss-Jordan Elimination to an augmented matrix in parallel on reconfigurable hardware consisting of parallel data processing modules, reusable memory blocks and flexible control logic units, which can greatly accelerate the solution procedure.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: July 14, 2020
    Assignee: University of Dayton
    Inventors: Zhenhua Jiang, Seyed Ataollah Raziei
  • Patent number: 10693178
    Abstract: Lithium sulfur batteries are described, especially ones that are flexible for wearing about an appendage of a wearer. Such batteries have a lithium metal anode, a sulfur cathode comprising sulfur, a conductive carbon, a lithium supertonic solid-state conductor, and a dendritic or hyperbranched polymer binder, an electrolyte layer between the lithium metal anode and the sulfur cathode, and a current collector positioned on the sulfur cathode opposite the electrolyte layer.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 23, 2020
    Assignee: UNIVERSITY OF DAYTON
    Inventors: Jitendra Kumar, Priyanka Bhattacharya, Guru Subramanyam
  • Patent number: 10671914
    Abstract: An analog neuromorphic circuit is disclosed, having input voltages applied to a plurality of inputs of the analog neuromorphic circuit. The circuit also includes a plurality of resistive memories that provide a resistance to each input voltage applied to each of the inputs so that each input voltage is multiplied in parallel by the corresponding resistance of each corresponding resistive memory to generate a corresponding current for each input voltage and each corresponding current is added in parallel. The circuit also includes at least one output signal that is generated from each of the input voltages multiplied in parallel with each of the corresponding currents for each of the input voltages added in parallel. The multiplying of each input voltage with each corresponding resistance is executed simultaneously with adding each corresponding current for each input voltage.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: June 2, 2020
    Assignee: University of Dayton
    Inventors: Chris Yakopcic, Md Raqibul Hasan, Tarek M. Taha
  • Patent number: 10622064
    Abstract: A crossbar circuit determines a match of N bits of data to at least one of M target words simultaneously. The circuit comprises N inputs (one per data bit) and M outputs (one per target word). For each of the M target words, the circuit comprises N?1 biased bits, where each biased bit includes a first data memristor coupled to a corresponding one of the N inputs; a second data memristor coupled to the corresponding one of the N inputs, where the corresponding one of the N inputs is inverted before reaching the second data memristor; and two biasing memristors. Further, the circuit comprises a general bit comprising a first data memristor coupled to the input that does not correspond to any of the biased bits; and a second data memristor coupled to the input that does not correspond to any of the biased bits and is inverted.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: April 14, 2020
    Assignee: University of Dayton
    Inventors: Tarek M. Taha, Chris Yakopcic
  • Publication number: 20200090933
    Abstract: Methods of making molybdenum sulfide (MoS2) on a stretchable substrate are disclosed. The method includes magnetron sputtering MoS2 onto a stretchable substrate, such as a stretchable polymeric material, at low temperatures to form a film precursor, and illumination annealing the film precursor to form high quality MoS2. The illumination source may be a laser or other source of radiation. Also, two-dimensional nanoelectronic devices made by the methods and/or from the high quality MoS2 are disclosed.
    Type: Application
    Filed: July 31, 2019
    Publication date: March 19, 2020
    Applicant: University of Dayton
    Inventors: Christopher Muratore, Michael E. McConney, Travis E. Shelton, Nicholas R. Glavin, John E. Bultman, Andrey A. Voevodin
  • Patent number: 10570541
    Abstract: Carbon nanotube threads are coated with a coating solution such as dimethylformamide (DMF), ethylene glycol (EG), polyethylene glycol (PEG), PEG200 (PEG with an average molecular weight of approximately 200 grams per mole (g/mol)), PEG400 (PEG with an average molecular weight of approximately 400 g/mol), aminopropyl terminated polydimethylsiloxane (DMS 100 cP),polymide, poly(methylhydrosiloxane), polyalkylene glycol, (3-aminopropyl)trimethoxysilane, hydride functional siloxane O resin, platinum (0) -1,3-divinyl-1,1,3,3-tetramethyl-disiloxane, moisture in air, acetic acid, water, poly(dimethylsiloxane) hydroxy terminated, (3-glycidyloxypropyl)-trimethoxysilane or a combination thereof. The coated carbon nanotubes may be used to stitch in a Z-direction into a composite such as a polymer prepreg to strengthen the composite. The stitching may occur using a sewing machine.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: February 25, 2020
    Assignees: University of Dayton, Nanocomp Technologies, Inc.
    Inventors: Paul Kladitis, Lingchuan Li, Brian Rice, Zongwu Bai, David Gailus
  • Patent number: 10488339
    Abstract: Apparatuses, methods, and computer program products for analyzing target compounds. An excitation signal comprising light having a time-varying intensity is transmitted into a target compound. In response to receiving the excitation signal, the target compound generates an emission signal. To increase the intensity of the emission signal, a fluorophore may be provided to the target compound. The fluorophore may be configured to react with a characteristic of the target compound so that the fluorophore generates the emission signal in response to the presence of both the characteristic and the excitation signal. The emission signal may be compared to the excitation signal in a frequency domain to determine a phase of the emission signal relative to the excitation signal. The phase may be used to determine a luminescence lifetime of the emission signal. If the detected luminescence lifetime matches an expected luminescence lifetime, the target compound likely includes the characteristic.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 26, 2019
    Assignee: University of Dayton
    Inventor: Vamsy Chodavarapu
  • Patent number: 10474948
    Abstract: An analog neuromorphic circuit is disclosed, having input voltages applied to a plurality of inputs of the analog neuromorphic circuit. The circuit also includes a plurality of resistive memories that provide a resistance to each input voltage applied to each of the inputs so that each input voltage is multiplied in parallel by the corresponding resistance of each corresponding resistive memory to generate a corresponding current for each input voltage and each corresponding current is added in parallel. The circuit also includes at least one output signal that is generated from each of the input voltages multiplied in parallel with each of the corresponding currents for each of the input voltages added in parallel. The multiplying of each input voltage with each corresponding resistance is executed simultaneously with adding each corresponding current for each input voltage.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: November 12, 2019
    Assignee: University of Dayton
    Inventors: Chris Yakopcic, Raqibul Hasan, Tarek M. Taha
  • Patent number: 10346738
    Abstract: An analog neuromorphic circuit is disclosed having resistive memories that provide a resistance to each corresponding input voltage signal. Input voltages are applied to the analog neuromorphic circuit. Each input voltage represents a vector value that is a non-binary value included in a vector that is incorporated into a dot-product operation with weighted matrix values included in a weighted matrix. A controller pairs each resistive memory with another resistive memory. The controller converts each pair of resistance values to a single non-binary value. Each single non-binary value is mapped to a weighted matrix value included in the weighted matrix that is incorporated into the dot-product operation with the vector values included in the vector. The controller generates dot-product operation values from the dot-product operation with the vector and the weighted matrix where each dot-product operation is a non-binary value.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: July 9, 2019
    Assignee: University of Dayton
    Inventors: Chris Yakopcic, Tarek M. Taha, Md Raqibul Hasan
  • Patent number: 10176425
    Abstract: An analog neuromorphic circuit is disclosed having resistive memories that provide a resistance to each corresponding input voltage signal. Input voltages are applied to the analog neuromorphic circuit. Each input voltage represents a vector value that is a non-binary value included in a vector that is incorporated into a dot-product operation with weighted matrix values included in a weighted matrix. A controller pairs each resistive memory with another resistive memory. The controller converts each pair of resistance values to a single non-binary value. Each single non-binary value is mapped to a weighted matrix value included in the weighted matrix that is incorporated into the dot-product operation with the vector values included in the vector. The controller generates dot-product operation values from the dot-product operation with the vector and the weighted matrix where each dot-product operation is a non-binary value.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: January 8, 2019
    Assignee: University of Dayton
    Inventors: Chris Yakopcic, Tarek M. Taha, Md Raqibul Hasan
  • Publication number: 20180319508
    Abstract: A system is provided for interfacing a Full Authority Digital Engine Control (FADEC) system with engine sensors and actuators using miniaturized Low Temperature Co-fired Ceramic (LTCC) substrates operating as smart notes that communicate digitally over a data bus to a miniaturized LTCC operating as a data concentrator. The use of smart nodes and/or data concentrators assembled on LTCC substrates provides enhanced thermal and vibration performance along with resistance to hydration, improved reliability and reduced overall size of the circuitry unit.
    Type: Application
    Filed: May 3, 2018
    Publication date: November 8, 2018
    Applicant: University of Dayton
    Inventors: Vamsy Chodavarapu, Guru Subramanyam
  • Publication number: 20180308692
    Abstract: Methods of making molybdenum sulfide (MoS2) on a stretchable substrate are disclosed. The method includes magnetron sputtering MoS2 onto a stretchable substrate, such as a stretchable polymeric material, at low temperatures to form a film precursor, and illumination annealing the film precursor to form high quality MoS2. The illumination source may be a laser or other source of radiation. Also, two-dimensional nanoelectronic devices made by the methods and/or from the high quality MoS2 are disclosed.
    Type: Application
    Filed: April 25, 2018
    Publication date: October 25, 2018
    Applicant: University of Dayton
    Inventors: Christopher Muratore, Michael E. McConney, Travis E. Shelton, Nicholas R. Glavin, John E. Bultman, Andrey A. Voevodin
  • Publication number: 20180301741
    Abstract: Lithium sulfur batteries are described, especially ones that are flexible for wearing about an appendage of a wearer. Such batteries have a lithium metal anode, a sulfur cathode comprising sulfur, a conductive carbon, a lithium supertonic solid-state conductor, and a dendritic or hyperbranched polymer binder, an electrolyte layer between the lithium metal anode and the sulfur cathode, and a current collector positioned on the sulfur cathode opposite the electrolyte layer.
    Type: Application
    Filed: April 18, 2018
    Publication date: October 18, 2018
    Applicant: University of Dayton
    Inventors: Jitendra Kumar, Priyanka Bhattacharya, Guru Subramanyam
  • Patent number: 9983089
    Abstract: A persistent color change liquid indicator includes a backing layer, a penetration layer, and a reaction layer. The backing layer has an indication color. The penetration layer includes a liquid structure to allow a liquid to travel through the penetration layer to the reaction layer. The penetration layer is opaque when dry and translucent when exposed to the liquid is to allow the indication color to be visible. The reaction layer reacts to the presence of the liquid such that the visibility of the indication color persists after exposure to the liquid ceases.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: May 29, 2018
    Assignee: University of Dayton
    Inventor: Robert E. Kauffman
  • Patent number: 9676627
    Abstract: Methods of growing boron nitride nanotubes and silicon nanowires on carbon substrates formed from carbon fibers. The methods include applying a catalyst solution to the carbon substrate and heating the catalyst coated carbon substrate in a furnace in the presence of chemical vapor deposition reactive species to form the boron nitride nanotubes and silicon nanowires. A mixture of a first vapor deposition precursor formed from boric acid and urea and a second vapor deposition precursor formed from iron nitrate, magnesium nitrate, and D-sorbitol are provided to the furnace to form boron nitride nanotubes. A silicon source including SiH4 is provided to the furnace at atmospheric pressure to form silicon nanowires.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: June 13, 2017
    Assignee: University of Dayton
    Inventor: Lingchuan Li
  • Patent number: 9545675
    Abstract: Nonmetallic tools such as rotary bits, circular blades, and scything tools are described that may be suitable for removing cured flexibilized epoxy gap-filler materials from gaps between soft composite materials. The nonmetallic tools may be formed from various plastic or composite materials that are sufficiently hard to cut through the gap-filler material while being sufficiently soft to avoid damaging adjacent areas of soft composite materials. Methods for using the nonmetallic tools may include attaching the nonmetallic tools to a suitable machine-driven tool and contacting the nonmetallic tools to a material to be cut, shaped, or drilled.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: January 17, 2017
    Assignee: University of Dayton
    Inventors: Paul K. Childers, Jr., Ryan P. Osysko
  • Patent number: 9474143
    Abstract: A vectorial optical field generator includes a radiation source a modulator surface, a first quarter wave plate, a second quarter wave plate, and an output plane. The radiation source emits an input radiation along a path and the modulator surface is positioned along the path and configured to modulate a phase, an amplitude, a polarization ratio, and a retardation of the input radiation along a fourth area of the modulator surface. The output plane is positioned along the path and receives output radiation resulting from modulating the input radiation with the modulator surface, the first quarter wave plate, and the second quarter wave plate.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: October 18, 2016
    Assignee: University of Dayton
    Inventors: Qiwen Zhan, Wei Han, Wen Cheng
  • Patent number: 9451339
    Abstract: A sensor transmitter for communicating wirelessly a presence of a condition within a metal enclosure includes a power supply, at least one sensor where each sensor senses a presence of a condition, and a low frequency generator positioned within a metal enclosure and electrically coupled to the power supply and the at least one sensor. The low frequency generator transmits a low frequency wireless signal indicative of the presence of the condition within the metal enclosure when the condition is present at one sensor.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: September 20, 2016
    Assignee: University of Dayton
    Inventors: Robert E. Kauffman, J. Douglas Wolf