Venkat Rangan

San Jose, California, United States Contact Info
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Software executive and technologist with over 40 years experience (26 years of executive…

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Publications

  • Information Retrieval for E-Discovery

    Foundations and Trendsin Information Retrieval

    E-discovery refers generally to the process by which one party (for
    example, the plaintiff) is entitled to “discover” evidence in the form
    of “electronically stored information” that is held by another party
    (for example, the defendant), and that is relevant to some matter that
    is the subject of civil litigation (that is, what is commonly called a
    “lawsuit”). This survey describes the emergence of the field, identifies
    the information retrieval issues that arise, reviews the…

    E-discovery refers generally to the process by which one party (for
    example, the plaintiff) is entitled to “discover” evidence in the form
    of “electronically stored information” that is held by another party
    (for example, the defendant), and that is relevant to some matter that
    is the subject of civil litigation (that is, what is commonly called a
    “lawsuit”). This survey describes the emergence of the field, identifies
    the information retrieval issues that arise, reviews the work to date on
    this topic, and summarizes major open issues.

    See publication
  • Discovery of Related Terms in a corpus using Reflective Random Indexing

    University of Maryland Land-grant university in College Park, Maryland

    A significant challenge in electronic discovery is the ability to
    retrieve relevant documents from a corpus of unstructured text
    containing emails and other written forms of human-to-human
    communications. For such tasks, recall suffers greatly since it is
    difficult to anticipate all variations of a traditional keyword search
    that an individual may employ to describe an event, entity or item
    of interest. In these situations, being able to automatically identify
    conceptually…

    A significant challenge in electronic discovery is the ability to
    retrieve relevant documents from a corpus of unstructured text
    containing emails and other written forms of human-to-human
    communications. For such tasks, recall suffers greatly since it is
    difficult to anticipate all variations of a traditional keyword search
    that an individual may employ to describe an event, entity or item
    of interest. In these situations, being able to automatically identify
    conceptually related terms, with the goal of augmenting an initial
    search, has significant value. We describe a methodology that
    identifies related terms using a novel approach that utilizes
    Reflective Random Indexing and present parameters that impact
    its effectiveness in addressing information retrieval needs for the
    TREC 2010 Enron corpus.

    See publication
  • EDRM Search Guide

    EDRM

    Editor and contributor. This document provides guidelines and suggestions to be considered by legal practitioners in developing appropriate and effective search methods.

    Other authors
    See publication
  • Securing Block Storage Protocols

    IETF

    Secure block storage and storage discovery protocols running over IP (Internet Protocol) using IPsec and IKE (Internet Key Exchange). Threat models and security protocols are developed for iSCSI (Internet Protocol Small Computer System Interface), iFCP (Internet Fibre Channel Storage Networking) and FCIP (Fibre Channel over TCP/IP), as well as the iSNS (Internet Storage Name Server) and SLPv2 (Service Location Protocol v2) discovery protocols.

    See publication
  • NFS V4 Protocol Management Information Base (MIB)

    IETF

    This memo defines an experimental portion of the Management Information Base (MIB) for use with network management protocols in the Internet Community. In particular, it defines objects used for the management of NFS version 4 Protocol (NFSv4) implementations.

    See publication

Patents

  • System and method for generating scores for predicting probabilities of task completion

    Issued 11651212

    According to various embodiments, described herein are systems and methods for training machine learning (ML) models to generate real-time scores to predict the probabilities of task completion.

    See patent
  • METHOD AND SYSTEM FOR PREDICTING TASK COMPLETION OF A TIME PERIOD BASED ON TASK COMPLETION RATES AND DATA TREND OF PRIOR TIME PERIODS IN VIEW OF ATTRIBUTES OF TASKS USING MACHINE LEARNING MODELS

    Issued US 10,846,643

  • AUTOMATIC RANKING AND SCORING OF MEETINGS AND ITS ATTENDEES WITHIN AN ORGANIZATION

    Issued US 10 ,438 ,172

    Systems and methods are provided for analyzing a history of meetings , the attendees , date of occurrence , and other content to determine the value of the meetings and the attendees . The importance of people and the meetings they attend can be derived based on patterns of attendees . In one embodiment , the meta - data of meetings and the attendees can be used to determine value without requiring time - consuming manual steps or manual evaluation of people and their titles . A graph of…

    Systems and methods are provided for analyzing a history of meetings , the attendees , date of occurrence , and other content to determine the value of the meetings and the attendees . The importance of people and the meetings they attend can be derived based on patterns of attendees . In one embodiment , the meta - data of meetings and the attendees can be used to determine value without requiring time - consuming manual steps or manual evaluation of people and their titles . A graph of meetings and its attendees can be generated and used by one or more automated software agents to place value to the content of the meeting , its agenda , and other meeting collateral such as meeting briefs / attachments of meetings . Accordingly , embodiments dramatically reduce the need for human examination of meeting history .

    See patent
  • Method and system for information retrieval effectiveness estimation in e-discovery

    Issued US 9,613,319

    A server computing system determines a plurality of statistics for a plurality of test documents, determines a number of false negatives for a corpus of documents based on one or more of the plurality of statistics for the plurality of test documents. The classification of a document of the corpus of documents is a false negative if classification of the document by a classification model is negative and classification of the document by a user is positive. The server computing system…

    A server computing system determines a plurality of statistics for a plurality of test documents, determines a number of false negatives for a corpus of documents based on one or more of the plurality of statistics for the plurality of test documents. The classification of a document of the corpus of documents is a false negative if classification of the document by a classification model is negative and classification of the document by a user is positive. The server computing system calculates an effectiveness of an information retrieval system on a corpus of documents based on the number of false negatives for the corpus of documents.

    See patent
  • System and method for training data generation in predictive coding

    Issued US 9607272

    A predictive coding system updates a plurality of training documents for an untrained classification model based on a plurality of additional documents. The plurality of additional documents are selected from a plurality of unlabeled documents based on a decision hyperplane associated with a first trained classification model. The predictive coding system provides the updated plurality of training documents to the untrained classification model to cause the untrained classification model to be…

    A predictive coding system updates a plurality of training documents for an untrained classification model based on a plurality of additional documents. The plurality of additional documents are selected from a plurality of unlabeled documents based on a decision hyperplane associated with a first trained classification model. The predictive coding system provides the updated plurality of training documents to the untrained classification model to cause the untrained classification model to be retrained and to cause a second trained classification model to be generated.

    See patent
  • Methods and systems for automatic evaluation of electronic discovery review and productions

    Issued US 9600568

    Techniques are provided for automatic sampling evaluation. An automatic sampling evaluation system enables users to evaluate convergence of one or more search processes. For example, given a set of searches that were validated by human review, a system can implement a retrieval process that samples one or more non-retrieved collections. Each individual document's similarity in the one or more non-retrieved collections is automatically evaluated to other documents in any retrieved sets. Given a…

    Techniques are provided for automatic sampling evaluation. An automatic sampling evaluation system enables users to evaluate convergence of one or more search processes. For example, given a set of searches that were validated by human review, a system can implement a retrieval process that samples one or more non-retrieved collections. Each individual document's similarity in the one or more non-retrieved collections is automatically evaluated to other documents in any retrieved sets. Given a goal of achieving a high recall, documents with high similarity can then be analyzed for additional noun phrases that may be used for a next iteration of a search. Convergence can be expected if the information gain in the new feedback loop is less than previous iterations, and if the additional documents identified are below a certain threshold document count.

    See patent
  • Enhancing training of predictive coding systems through user selected text

    Issued US 9058327

  • Systems and methods for scalable distributed storage processing

    Issued US 8200871

  • Methods and systems of electronic message threading and ranking

    Issued US US8032598

  • Methods and systems for e-mail topic classification

    Issued US US7899871

  • Methods and systems for automatically generating semantic/concept searches

    Issued US 8719257

    In various embodiments, a semantic space associated with a corpus of electronically stored information (ESI) may be created and used for concept searches. Documents (and any other objects in the ESI, in general) may be represented as vectors in the semantic space. Vectors may correspond to identifiers, such as, for example, indexed terms. The semantic space for a corpus of ESI can be used in information filtering, information retrieval, indexing, and relevancy rankings.

    See patent
  • Apparatus and method for data migration in a storage processing device

    Issued US 7752361

  • Methods, systems, and user interface for e-mail search and retrieval

    Issued US 7743051

  • Methods and systems of electronic message derivation

    Issued US 7657603

  • Methods and systems of electronic message threading and ranking

    Issued US US7593995

  • APPARATUS AND METHOD FOR STORAGE PROCESSING WITH SPLIT DATA AND CONTROL PATHS

    Issued US US7376765

  • Method and apparatus for estimating a percentile for a value

    Issued US 6434570

  • Method and apparatus providing for automatically restarting a client-server connection in a distributed network

    Issued US 6216163

  • Method and apparatus determining the load on a server in a network

    Issued US US5987493

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