Patents Assigned to Drexel University
  • Publication number: 20230090772
    Abstract: A proposed technique allows for the security of the logic cone through logic locking and secures the outputs of the circuit from the scan chain without modifications to the structure of the scan chain. Since the oracle responses in test mode do not correspond to the functional key, satisfiability (SAT) attacks are not able to leverage the responses from the scan chain. In addition, a charge accumulation circuit is developed to prevent and detect any attempt to enter the partitioned test mode while the correct circuit responses are still stored within the registers.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 23, 2023
    Applicant: Drexel University
    Inventors: Kyle Joseph Juretus, Ioannis Savidis
  • Publication number: 20230084483
    Abstract: The growing research interest in passive RFID (Radio Frequency Identification)-based devices and sensors in a diverse group of applications calls for flexibility in reader antenna performance. A low-cost, easy-to-fabricate, and pattern reconfigurable UHF (Ultra High Frequency) RFID reader antenna in the RFID ISM band (902-928 MHz in the US) may offer a 54 MHz bandwidth (890 944 MHz) and 8.9 dBi maximum gain. The reconfigurable antenna can radiate four electronically switchable radiation beams in the azimuth plane. The antenna may be LHCP (Left Hand Circularly Polarized) with axial ratio (AR) in the ranging from 0.45 dB to 7 dB in the RFID ISM band.
    Type: Application
    Filed: September 1, 2022
    Publication date: March 16, 2023
    Applicant: Drexel University
    Inventors: Md Abu Saleh Tajin, Kapil R. Dandekar
  • Publication number: 20230050974
    Abstract: A method for evaluating reading comprehension is provided. The method includes the steps of providing at least one printed passage of text; providing a test subject, the test subject wearing a device for measuring brain frontal lobe usage; requiring the test subject to read the printed passage; providing a question based on the printed passage for the test subject to answer; and determining whether the device measures brain frontal lobe usage. A system for performing the method is also provided.
    Type: Application
    Filed: November 3, 2022
    Publication date: February 16, 2023
    Applicant: Drexel University
    Inventors: Lori Severino, Mary Jane Tecce DeCarlo, Meltem Izzetoglu
  • Publication number: 20230044615
    Abstract: One aspect of the invention provides a method for freeze-drying surfactant-stabilized microbubbles. The method includes: preparing vials comprising a mixture comprising microbubbles; partially submerging the vials in a chilled water bath, wherein the water bath has a sub-freezing temperature; placing the vials on a cooled shelf of a lyophilizer; freeze-drying the vials in the lyophilizer; and capping the freeze-dried vials. Another aspect of the invention provides a method for annealing surfactant-stabilized microbubbles. The method includes: preparing vials comprising a mixture comprising microbubbles; passing the vials in and out of liquid nitrogen (LN2) until the mixture is frozen; holding the vials at ?20° C.; placing the vials on a cooled shelf of a lyophilizer; freeze-drying the vials in the lyophilizer; and capping the freeze-dried vials.
    Type: Application
    Filed: June 30, 2022
    Publication date: February 9, 2023
    Applicants: Thomas Jefferson University, Drexel University
    Inventors: Brian Edward Oeffinger, Margaret A. Wheatley, Rawan Shraim, Purva Vaidya, John Robert Eisenbrey
  • Publication number: 20230040397
    Abstract: A backside thermography technique was developed based on the temperature sensitivity of laser-induced fluorescence in flowing two-dye solutions. The approach utilizes visible light and optically transparent packaging materials to obtain spatially resolved transient thermal measurements. This technique is compatible with optically transparent water-cooled packaging, which will allow for the characterization of processes where heat is added as well as removed. A setup was designed, constructed, and used to study the performance of seven two-dye Rhodamine B (RhB)-Rhodamine 110 (Rh110) fluorescent solutions. The effect of dye concentration ratio on sensitivity, maximum frame rate, and excitation area was characterized. The system was used to demonstrate in-situ temperature measurements showing the importance of two-dye light compensation, as well as backside thermography using a simple droplet contact method to investigate temporal response.
    Type: Application
    Filed: August 4, 2022
    Publication date: February 9, 2023
    Applicant: Drexel University
    Inventors: Matthew McCarthy, Deborah Kapilow
  • Patent number: 11571249
    Abstract: Disclosed is a method for treating actinic keratosis of tissue of a patient, the method including contacting non-thermal, atmospheric pressure plasma over areas of the tissue having actinic keratosis for a time and at treatment conditions effective to give rise to an at least partial amelioration of the keratosis.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 7, 2023
    Assignee: Drexel University
    Inventors: Peter C. Friedman, Vandana Miller, Gregory Fridman, Abraham Lin, Alexander Fridman
  • Patent number: 11559944
    Abstract: A system and method for three-dimensionally printing high viscosity materials using electrohydrodynamics is provided. The system uses a relatively low voltage electric field to draw high viscosity polymers (not in solution) from a nozzle to form three-dimensional objects with lines less than 10 microns in width. Pressurized gas at the nozzle outlet can be used to print large size/dimension parts, instead of or in addition to the electric field to draw the polymers from the nozzle.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: January 24, 2023
    Assignee: Drexel University
    Inventors: Gongyao Zhou, Dajing Gao
  • Patent number: 11554961
    Abstract: The present disclosure describes a crumpled form of MXene materials, and methods of making and using these novel compositions.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: January 17, 2023
    Assignee: Drexel University
    Inventors: Michel W. Barsoum, Di Zhao, Varun Natu
  • Publication number: 20230003669
    Abstract: A passive UHF (Ultra High Frequency, 902-928 MHz) RFID-based fabric (such as a diaper) moisture sensor is low-cost, user-friendly, reusable, washable, environment-friendly and comes with an extended on-body read range of 3.6 meters with baby diapers and 4.4 meters with adult diapers. The external reader unit is connected to the internet or a local network, and may automatically notify the parents or caregivers as soon as the presence of moisture is detected.
    Type: Application
    Filed: September 1, 2022
    Publication date: January 5, 2023
    Applicant: Drexel University
    Inventors: Md Abu Saleh Tajin, Kapil R. Dandekar
  • Patent number: 11540120
    Abstract: A key-based interleaver for enhancement the security of wireless communication includes a physical layer communication channel key to provide security even when the software encryption key is compromised. A method of creating a secure communication link using a physical layer interleaving system includes implementing a key policy implementation that utilizes temporal dependency and interleaving bits using a flexible inter and intra-block data interleaver.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: December 27, 2022
    Assignee: Drexel University
    Inventors: Kapil R. Dandekar, James J. Chacko, Kyle Joseph Juretus, Marko Jacovic, Cem Sahin, Nagarajan Kandasamy, Ioannis Savidis
  • Publication number: 20220372201
    Abstract: This invention relates to a method for synthesizing polyoxymethylene on a substrate. The method includes depositing monomer capable of forming polyoxymethylene by an initiated polymerization reaction and an initiator, via initiated chemical vapor deposition (iCVD) onto a surface of a substrate in an initiated chemical vapor deposition reactor.
    Type: Application
    Filed: February 9, 2021
    Publication date: November 24, 2022
    Applicant: Drexel University
    Inventors: Kenneth K.S. LAU, Zhengtao CHEN
  • Patent number: 11504524
    Abstract: A multi-site probe for interfacing with the central nervous system includes one more structures disposed perpendicularly on a backing layer, where each structure includes a braided sleeve over a flexible or rigid core, and a delivery-vehicle. The structures may include optrodes and electrodes. The location of the probe may be determined through the application of combinatorics.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: November 22, 2022
    Assignee: Drexel University
    Inventor: Simon Francis Giszter
  • Patent number: 11482307
    Abstract: An incremental author disambiguation framework may create new clusters to accommodate new data based on the existing cluster results and newly added data. The proposed system may provide frequent update of taxonomic classification, name disambiguation and many other applications because it takes less time to generate new results. In addition, the proposed methods may reduce the time needed for updating the model and help improve the performance with the limited computational resource.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: October 25, 2022
    Assignee: Drexel University
    Inventors: Zhengqiao Zhao, Gail Rosen
  • Patent number: 11470424
    Abstract: The present disclosure is directed to electroacoustical devices comprising patterned MXene compositions on biaxially oriented polymer substrates and methods of making and using the same.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: October 11, 2022
    Assignee: Drexel University
    Inventors: Devon J. Spinelli, Thomas Heng, Asia Sarycheva, Pavel S. Lelyukh, Yury Gogotsi
  • Patent number: 11469423
    Abstract: The present invention is directed to methods of making a nanofiber-nanoparticle network to be used as electrodes of fuel cells. The method comprises electrospinning a polymer-containing material on a substrate to form nanofibers and electrospraying a catalyst-containing material on the nanofibers on the same substrate. The nanofiber-nanoparticle network made by the methods is suitable for use as electrodes in fuel cells.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: October 11, 2022
    Assignee: Drexel University
    Inventors: Yossef A. Elabd, Francis W. Richey, Kevin H. Wujcik
  • Patent number: 11457845
    Abstract: A system, device and methods for quantitatively monitoring and evaluating changes in water and hemoglobin content in the brain in a non-invasive manner are provided. The system may be used for real-time detection and monitoring of brain edema and/or for an assessment of cerebral autoregulation.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: October 4, 2022
    Assignee: Drexel University
    Inventors: Meltem Izzetoglu, Juan Du, Baruch Ben Dor, Shadi Malaeb
  • Patent number: 11456527
    Abstract: The present disclosure is directed to antennas for transmitting and/or receiving electrical signals comprising a MXene composition, devices comprising these antennas, and methods of transmitting and receiving signals using these antennas.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: September 27, 2022
    Assignee: Drexel University
    Inventors: Yury Gogotsi, Babak Anasori
  • Publication number: 20220297350
    Abstract: The present invention relates to a method for assembling particles having a long axis, a short axis and an average aspect ratio of 10-10,000. The method includes agitating a combination of a first solution, a second solution and the particles in any order to form a mixture wherein one of the first solution and the second solution is in the form of droplets dispersed in the other of the first solution and the second solution and the long axis of the particles is longer than a diameter of the droplets in the mixture, and continuing the agitation until the particles assemble into aggregates of particles with at least 30% of the particles aligned in parallel along the long axis. Aggregate or aggregate composites form by the method are also described.
    Type: Application
    Filed: August 28, 2020
    Publication date: September 22, 2022
    Applicant: Drexel University
    Inventors: Joy Rene BAXTER, Nicolas Javier ALVAREZ, Giuseppe Rafaello PALMESE
  • Patent number: 11444210
    Abstract: The increasing power density and, therefore, current consumption of high performance integrated circuits (ICs) results in increased challenges in the design of a reliable and efficient on-chip power delivery network. In particular, meeting the stringent on-chip impedance of the IC requires circuit and system techniques to mitigate high frequency noise that results due to resonance between the package inductance and the onchip capacitance. In this paper, a novel circuit technique is proposed to suppress high frequency noise through the use of a hyperabrupt junction tuning varactor diode as a decoupling capacitor for noise critical functional blocks. With the proposed circuit technique, the voltage droops and overshoots on the onchip power distribution network are suppressed by up to 60% as compared to MIM or deep trench decoupling capacitors of the same capacitance.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: September 13, 2022
    Assignee: Drexel University
    Inventors: Divya Pathak, Ioannis Savidis
  • Patent number: 11435802
    Abstract: A real-time workload scheduling heuristic assigns tasks to the cores such that the total load current consumption of the cores is always less than the total current capability of the under-provisioned on-chip voltage regulators. In addition, the energy-efficient scheduling of the tasks on to the cores ensures that the reconfiguration of the power delivery network is minimized. The heuristic includes DVFS management based on the unique constraints of the under provisioned voltage regulators.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: September 6, 2022
    Assignee: Drexel University
    Inventors: Ioannis Savidis, Divya Pathak, Houman Homayoun