Patents by Inventor Sonali Das

Sonali Das has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11844228
    Abstract: A leaf inspired biomimetic light trapping scheme for ultrathin flexible graphene silicon Schottky junction solar cell. An all-dielectric approach comprising of lossless silica and titania nanoparticles is used for mimicking the two essential light trapping mechanisms of a leaf: (1) focusing and waveguiding and (2) scattering. The light trapping scheme uses two optically tuned layers and does not require any nano-structuring of the active silicon substrate, thereby ensuring that the optical gain is not offset due to recombination losses.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: December 12, 2023
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Tania Roy, Sonali Das
  • Patent number: 11574177
    Abstract: A phototransistor device to act as an artificial photonic synapse includes a substrate and a graphene source-drain channel patterned on the substrate. A perovskite quantum dot layer is formed on the graphene source-drain channel. The perovskite quantum dot layer is methylammonium lead bromide material. A method of operating the phototransistor device as an artificial photonic synapse includes applying a first fixed voltage to a gate of the phototransistor and a second fixed voltage across the graphene source-drain channel. A presynaptic signal is applied as stimuli across the graphene source-drain channel. The presynaptic signal includes one or more pulses of light or electrical voltage. A current across the graphene source-drain channel is measured to represent a postsynaptic signal.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: February 7, 2023
    Inventors: Jayan Thomas, Tania Roy, Sonali Das, Basudev Pradhan, Jinxin Li
  • Publication number: 20200144526
    Abstract: A leaf inspired biomimetic light trapping scheme for ultrathin flexible graphene silicon Schottky junction solar cell. An all-dielectric approach comprising of lossless silica and titania nanoparticles is used for mimicking the two essential light trapping mechanisms of a leaf: (1) focusing and waveguiding and (2) scattering. The light trapping scheme uses two optically tuned layers and does not require any nano-structuring of the active silicon substrate, thereby ensuring that the optical gain is not offset due to recombination losses.
    Type: Application
    Filed: October 10, 2019
    Publication date: May 7, 2020
    Inventors: Tania Roy, Sonali Das
  • Patent number: 8645075
    Abstract: The attached disclosure provides a systems approach based on mathematical modelling of the kinetics of essential biochemical pathways involved in organ homeostasis. When this in silico model is coupled with in-vitro and/or in-vivo measurements to quantify drug-induced perturbations, a powerful platform that allows accurate and mechanistic-level prediction of drug-induced organ injury can be generated. The method described in this disclosure demonstrates that several physiological situations can also be accurately modelled in addition to the effect of perturbations induced by drugs. It can also be used along with high-throughput “omics” data to generate testable hypotheses leading to informed decision-making in drug development.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: February 4, 2014
    Assignee: Strand Life Sciences PVT Ltd.
    Inventors: Kalyanasundaram Subramanian, Sowmya Raghavan, Anupama Rajan Bhat, Sonali Das, Jyoti Bajpai Dikshit, Rajeev Kumar, Narasimha Mandyam Krishnakumar, Nalini Rajeshwara, Rajesh Radhakrishnan, Srivatsan Raghunathan
  • Publication number: 20130323767
    Abstract: The present disclosure relates to a methodology that identifies the underlying mechanisms that lead to hepatotoxicity. This is done by using the alterations in cellular metabolite profiles obtained before and after therapy/drug treatment in combination with a model of liver metabolism. Subsequently, by using a covariance matrix adaptation followed by evolutionary selection, it compares the drug-induced metabolite profiles obtained experimentally with those generated using the in silico model, automatically shortlists potential parameters whose alterations could have produced the drug-treated metabolite profile. Values of these parameters are estimated by formulating an optimal control problem to minimize the differences between the model-generated metabolite values and experimentally observed data. The estimated parameters are given as an input to the homeostatic liver model and simulations are carried out, thereby the results providing a mechanistic explanation for the development of toxicity.
    Type: Application
    Filed: March 5, 2012
    Publication date: December 5, 2013
    Applicant: STRAND LIFE SCIENCES PRIVATE LIMITED
    Inventors: Kalyanasundaram Subramanian, Sonali Das, Rajeev Kumar, Sowmya Raghavan, Osman Shahi Shaik, Partha Pratim Chakrabarti, Narasimha Mandyam Krishnakumar, Nalini Rajeswara, Anupama Rajan Bhat
  • Publication number: 20100179798
    Abstract: The attached disclosure provides a systems approach based on mathematical modelling of the kinetics of essential biochemical pathways involved in organ homeostasis. When this in silico model is coupled with in-vitro and/or in-vivo measurements to quantify drug-induced perturbations, a powerful platform that allows accurate and mechanistic-level prediction of drug-induced organ injury can be generated. The method described in this disclosure demonstrates that several physiological situations can also be accurately modelled in addition to the effect of perturbations induced by drugs. It can also be used along with high-throughput “omics” data to generate testable hypotheses leading to informed decision-making in drug development.
    Type: Application
    Filed: December 9, 2009
    Publication date: July 15, 2010
    Applicant: STRAND LIFE SCIENCES PVT LTD.
    Inventors: Kalyanasundaram Subramanian, Sowmya Raghavan, Anupama Rajan Bhat, Sonali Das, Jyoti Bajpai Dikshit, Rajeev Kumar, Narasimha Mandyam Krishnakumar, Nalini Rajeshwara, Rajesh Radhakrishnan, Srivatsan Raghunathan