Abstract: An energy-efficient method of controlling the composite microstructure and resulting thermoelectric (TE) properties of TE composite films. The TE composite films, which include a small amount of naturally occurring chitosan binder that is sufficient to hold TE particles together, are modified by applying uniaxial mechanical pressure at low temperatures for a short duration. The TE composite films have high electrical conductivity and low thermal conductivity, making them ideal for use into high-performance energy harvesting thermoelectric devices.
Type:
Grant
Filed:
March 29, 2022
Date of Patent:
July 16, 2024
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: The present invention is directed to compounds, methods and compositions for treating or preventing viral infections using nucleosides analogs. Specifically, the present invention provides for the design and synthesis of acyclic fleximer nucleoside analogues having increased flexibility and ability to alter their conformation structures to provide increased antiviral activity potential with the result of inhibiting flaviviruses, filoviruses and/or coronaviruses.
Type:
Grant
Filed:
January 6, 2022
Date of Patent:
May 14, 2024
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: A one-dimensional (1D) and two-dimensional (2D) scan scheme for a tracking continuously scanning laser Doppler vibrometer (CSLDV) system to scan the whole surface of a rotating structure excited by a random force. A tracking CSLDV system tracks a rotating structure and sweep its laser spot on its surface. The measured response of the structure using the scan scheme of the tracking CSLDV system is considered as the response of the whole surface of the structure subject to random excitation. The measured response can be processed by operational modal analysis (OMA) methods (e.g., an improved lifting method, an improved demodulation method, an improved 2D demodulation method). Damped natural frequencies of the rotating structure are estimated from the fast Fourier transform of the measured response. Undamped full-field mode shapes are estimated by multiplying the measured response using sinusoids whose frequencies are estimated damped natural frequencies.
Type:
Grant
Filed:
October 21, 2022
Date of Patent:
March 5, 2024
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: The present invention provides for excitable molecules positioned near metallic structures, wherein the metallic structures have a particles size from about 1 nm to 1000 nm and wherein the excitable molecules have fluorescence, phosphorescence or alpha-fluorescence emissions that are altered due to positioning near the metal structures. The emission spectra are distorted on either the blue or red edges in a range from 1 to 10 nm thereby changing the color of emissions. Further, the width of the emission spectrum is modified either by narrowing or broadening depending on the material of the metallic structures and type of excitable molecule.
Type:
Grant
Filed:
July 16, 2019
Date of Patent:
March 5, 2024
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: Zinc electrolytic manganese dioxide (EMD) batteries including a high performing flexible chitosan-based gel electrolyte with poly-vinyl alcohol (PVA) and potassium hydroxide (KOH) additives were prepared. The Zn-EMD batteries were constructed using an optimized assembly technique employed to achieve good interfacial contact between the layers. Attaining energy densities between 150-250 Wh/kg (w.r.t cathode mass) is possible for these batteries, encouraging their use in wearable or flexible electronics. Using the chitosan-based gel electrolyte and limited voltage window testing, the prepared Zn-EMD alkaline batteries are among the best reported polymer-based alkaline electrolyte Zn rechargeable batteries.
Type:
Grant
Filed:
October 22, 2021
Date of Patent:
January 9, 2024
Assignee:
University of Maryland, Baltimore County
Abstract: Energy harvesters (EH) which can effectively harvest wasted vibrational/kinematic energy and convert it into electrical energy for battery-free sensor operation are described herein. The target application of the energy harvesters includes powering wireless sensors used for wind turbine blade structural monitoring.
Type:
Grant
Filed:
December 17, 2020
Date of Patent:
January 9, 2024
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: A tidal current energy converter including an infinitely variable transmission (IVT) control system and a hybrid vertical axis wind (or water) turbine (VAWTs) apparatus. The hybrid VAWT apparatus includes a modified-Savonius (MS) rotor in the central region and a straight bladed H-type Darrieus rotor in the surrounding annular region. The IVT control system includes a nonlinear closed-loop control combined with an integral time-delay feedback control to adjust a speed ratio of the IVT. A speed ratio control for an IVT system involves a forward speed controller and/or a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
Type:
Grant
Filed:
April 19, 2022
Date of Patent:
January 2, 2024
Assignee:
University of Maryland, Baltimore County
Inventors:
Weidong Zhu, Gang Li, Meilin Yu, Xuefeng Wang
Abstract: The present disclosure relates to electrochemical biosensing systems and methods that can be adapted to accurately and rapidly detect a target gene in clinical samples, using anti-sense oligonucleotides for selective detection of biological pathogens.
Type:
Application
Filed:
October 5, 2021
Publication date:
December 28, 2023
Applicants:
University of Maryland, Baltimore, University of Maryland, Baltimore County
Inventors:
Dipanjan PAN, Maha Mohammad Shehadeh ALAFEEF, Ketan DIGHE, Parikshit MOITRA
Abstract: Disclosed is an electromagnetic coil system for use during transcranial or transdermal stimulation procedures, in which an electrically conductive coil wraps around a magnetic core at an oblique wrapping angle to provide a more directed focal spot size at a given depth inside of, for example, a patient's body. In certain configurations, the electrically conductive coil may be adjustable with respect to the magnetic core, such that the wrapping angle of the electrically conductive coil may be modified to, in turn, adjust the focal spot size of the induced electric field generated by the system as may desired to concentrate the field at a particularly desired location.
Type:
Grant
Filed:
January 10, 2020
Date of Patent:
December 26, 2023
Assignees:
University of Maryland, Baltimore, University of Maryland, Baltimore County
Inventors:
L. Elliot Hong, Fow-Sen Choa, Qinglei Meng
Abstract: A process of simply, cheaply, and reproducibly creating complex tissue models using screen printing and the tissue model prepared using the screen printing process. These models are amenable to high throughput screening. They will allow the study of components of disease progression and can be used for screening therapies.
Type:
Grant
Filed:
February 23, 2021
Date of Patent:
November 21, 2023
Assignees:
University of Maryland, Baltimore County, University of Maryland, Baltimore
Inventors:
Erin Lavik, Steve Bernstein, Adam Day, Bryan Ibarra
Abstract: A device and method for detecting the presence of bacteria in a sample are provided. A multi-step process for sample preparation is utilized and a microfluidic device is disclosed. The detection is performed using microfluidics and physical changes in multiple samples in differential mode.
Type:
Grant
Filed:
January 25, 2021
Date of Patent:
October 17, 2023
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Inventors:
Govind Rao, Yordan Kostov, Mustafa Al-Adhami, Chandrasekhar Gurramkonda
Abstract: Energy harvesters (EH) which can effectively harvest wasted vibrational/kinematic energy and convert it into electrical energy for battery-free sensor operation are described herein. The energy harvesters can be integrated with a power management circuit and a wireless sensor for monitoring wind turbine blades. The target application of the energy harvesters includes powering the wireless sensors used for wind turbine blade structural monitoring.
Type:
Grant
Filed:
August 22, 2018
Date of Patent:
August 15, 2023
Assignee:
University of Maryland, Baltimore County
Abstract: The present invention provides for a fully integrated microfluidic system capable of producing single-dose amounts of biotherapeutics at the point-of-care wherein protein production, purification and product harvest are all integrated as a single microfluidic device which is portable and capable of continuous-flow production of biotherapeutics at the microscale using a cell-free reaction system.
Type:
Grant
Filed:
June 7, 2018
Date of Patent:
July 25, 2023
Assignee:
University of Maryland, Baltimore County
Inventors:
Govind Rao, Yordan Kostov, Abhay Andar, Mustafa Al-Adhami, Sevda Deldari, Douglas D. Frey
Abstract: A portable and mobile bioprocessing system and method for protein manufacturing that is compact, integrated and suited for on-demand production of any type of proteins and for delivery of the produced proteins to patients or for assay purposes. The portable system and method can also be used for efficient on-demand production of any type of protein with point-of-care delivery.
Type:
Grant
Filed:
July 15, 2021
Date of Patent:
July 18, 2023
Assignee:
University of Maryland, Baltimore County
Abstract: The present invention provides for nutrient extraction and recovery devices that use the Donnan Membrane Principle (DMP) to cause spontaneous separation of dissolved ions along electrochemical potential gradients, wherein anions and cations such as H2PO4?, HPO42?, PO43?, Mg2+, Ca2+, NH4+, and K+ are moved from manure containing waste streams through cation and anion exchange membranes into a recovery stream thereby precipitating target compounds including but not limited to struvite, potassium struvite and hydroxyapatite.
Type:
Grant
Filed:
May 22, 2019
Date of Patent:
July 11, 2023
Assignee:
University of Maryland, Baltimore County
Abstract: The present invention relates to cell free protein manufacturing, and more particularly, for integrating machine learning into a portable cell-free bioprocessing system for producing proteins with increased and consistent purity, potency and quality wherein such proteins are prepared on-demand and for point-of-care delivery.
Type:
Grant
Filed:
May 15, 2019
Date of Patent:
June 27, 2023
Assignee:
University of Maryland, Baltimore County
Inventors:
Govind Rao, Yordan Kostov, Benjamin Punshon-Smith, Rajani Adiga
Abstract: A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
Type:
Grant
Filed:
March 2, 2022
Date of Patent:
June 27, 2023
Assignee:
University of Maryland, Baltimore County
Abstract: This invention is a computer-implemented method and system of using a secondary classification algorithm after using a primary source code vulnerability scanning tool to more accurately label true and false vulnerabilities in source code. The method and system use machine learning within a 10% dataset to develop a classifier model algorithm. A selection process identifies the most important features utilized in the algorithm to detect and distinguish the true and false positive findings of the static code analysis results. A personal identifier is used as a critical feature for the classification. The model is validated by experimentation and comparison against thirteen existing classifiers.
Type:
Grant
Filed:
June 24, 2020
Date of Patent:
April 4, 2023
Assignee:
UNIVERSITY OF MARYLAND BALTIMORE COUNTY
Inventors:
George Karabatis, Foteini Cheirdari-Argiropoulos
Abstract: The present invention provides for metallic structures comprising a sulfhydryl or amino-terminated hydrophilic coating to provide a layer of hydrophilic character on the surface of the metallic structures thereby allowing the use of low volumes of aqueous solvents of fluorophores that have the ability to “spread out” across the surfaces of the metallic structures and to provide for a more uniform surface coating of fluorophores attached to or near the metallic structures.
Type:
Grant
Filed:
July 22, 2016
Date of Patent:
January 24, 2023
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Abstract: The invention described herein is directed to methods and systems for protecting network trace data. Network traces are used for network management, packet classification, traffic engineering, tracking user behavior, identifying user behavior, analyzing network hierarchy, maintaining network security, and classifying packet flows. In some embodiments, network trace data is protected by subjecting network trace data to data anonymization using an anonymization algorithm that simultaneously provides sufficient privacy to accommodate the organization need of the network trace data owner, provides acceptable data utility to accommodate management and/or network investigative needs, and provides efficient data analysis, at the same time.
Type:
Grant
Filed:
October 28, 2020
Date of Patent:
October 25, 2022
Assignee:
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
Inventors:
George Karabatis, Zhiyuan Chen, Ahmed Aleroud, Fan Yang