Patents by Inventor VASILIS EFTHYMIOU

VASILIS EFTHYMIOU 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).

  • Publication number: 20220277031
    Abstract: A computing device and computer-implemented method to provide access to business intelligence data via a conversational interface is described. The method begins with receiving prior user interactions based on corresponding pairs of user queries and computing device responses, with the conversational interface. Received also is a business intelligence ontology and access to a conversational space structure for the conversational interface. The computing device executes a machine learning model based upon the prior user interactions, business intelligence ontology, and the conversational space structure to predict possible next queries. The possible next queries are sent to a user. In one example, the computing device receives a user query, which is in addition to the prior user interactions with the conversational interface. A response to the query is generated. The response to the query is sent to the user prior to sending the possible next queries, which have been predicted.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 1, 2022
    Inventors: Abdul QUAMAR, Fatma OZCAN, Chuan LEI, Vasilis EFTHYMIOU, Venkata Vamsikrishna MEDURI
  • Publication number: 20220237447
    Abstract: An embodiment includes extracting, responsive to an update request from a remote requesting system, technical descriptor data from a data source. The embodiment also includes forming a new graph data structure using the technical descriptor data extracted from the data source. The embodiment also includes augmenting the new graph data structure to include a concept based on a value from instance data from the data source. The embodiment also includes identifying a first pair of concepts that are connected in a pre-existing ontology that correspond with a second pair of concepts that lack a connection therebetween in the new graph structure. The embodiment also includes augmenting the new graph data structure to include a connection between the second pair of concepts. The embodiment also includes outputting the new graph data structure as part of a response to the update request from the requesting system.
    Type: Application
    Filed: January 28, 2021
    Publication date: July 28, 2022
    Applicant: International Business Machines Corporation
    Inventors: Chuan Lei, Junheng Hao, Vasilis Efthymiou, Fatma Ozcan, Abdul Quamar
  • Publication number: 20220237446
    Abstract: An embodiment includes generating a first concept representation based on a first portion of a knowledge base using a first processing path of a neural network that includes a hyperbolic graph convolution layer. The embodiment also includes generating a second concept representation based on a second portion of the knowledge base using a second processing path of the neural network, the second processing path comprising a heterogenous graph convolution layer. The embodiment also includes generating a unified concept representation including concatenating the first concept representation with the second concept representation. The embodiment also includes generating a prediction score using a using a predictive matching module, where the predictive score is indicative of an extent of a match between the unified concept representation and a concept representation from a second knowledge base.
    Type: Application
    Filed: January 28, 2021
    Publication date: July 28, 2022
    Applicant: International Business Machines Corporation
    Inventors: Chuan Lei, Junheng Hao, Vasilis Efthymiou, Fatma Ozcan, Abdul Quamar
  • Publication number: 20220207343
    Abstract: Computer-implemented techniques for entity disambiguation using graph neural networks (GNNs) are provided. According to an embodiment, computer implemented method can comprise receiving, by a system operatively coupled to a processor, an unstructured text snippet comprising an unknown term. The method further comprises employing, by the system, a heterogeneous GNN trained on a knowledge graph associated with a domain of the unstructured text snippet to facilitate identifying one or more similar terms included within the knowledge graph for the unknown term.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 30, 2022
    Inventors: Chuan Lei, Alina Vretinaris, Vasilis Efthymiou, Fatma Ozcan
  • Patent number: 11157467
    Abstract: According to one or more embodiments of the present invention, a computer-implemented method for providing a query response includes receiving, by a computing device, a domain-specific knowledge graph. The method further includes generating a first property graph schema, a property graph schema includes vertices, edges, and properties of the domain-specific knowledge graph, wherein the first property graph schema is generated based on an ontology of the domain-specific knowledge graph. The method further includes generating a second property graph schema from a copy of the first property graph schema that is optimized by applying one or more types of relationships in the first property graph schema. The method further includes instantiating a property graph using the second property graph schema. The method further includes receiving a query to obtain particular data from the domain-specific knowledge graph. The method further includes responding to the query using the property graph.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: October 26, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chuan Lei, Abdul Quamar, Vasilis Efthymiou, Fatma Ozcan, Rana Alotaibi
  • Publication number: 20210263898
    Abstract: According to one or more embodiments of the present invention, a computer-implemented method for providing a query response includes receiving, by a computing device, a domain-specific knowledge graph. The method further includes generating a first property graph schema, a property graph schema includes vertices, edges, and properties of the domain-specific knowledge graph, wherein the first property graph schema is generated based on an ontology of the domain-specific knowledge graph. The method further includes generating a second property graph schema from a copy of the first property graph schema that is optimized by applying one or more types of relationships in the first property graph schema. The method further includes instantiating a property graph using the second property graph schema. The method further includes receiving a query to obtain particular data from the domain-specific knowledge graph. The method further includes responding to the query using the property graph.
    Type: Application
    Filed: February 25, 2020
    Publication date: August 26, 2021
    Inventors: CHUAN LEI, ABDUL QUAMAR, VASILIS EFTHYMIOU, FATMA OZCAN, RANA ALOTAIBI