Sep 2020 – Aug 2025 · 4 yrs 11 mos

Apr 2020 – Oct 2020 · 6 mos

Jan 2018 – Apr 2020 · 2 yrs 3 mos

Sep 2015 – Dec 2017 · 2 yrs 3 mos

Jun 2014 – Aug 2014 · 2 mos · Princeton, New Jersey

• During this internship I worked on improving a patent based search system. The tasks involved included applying various text mining approaches (TF-IDF and its variants) to improve keyword extraction and the expansion process for the system. I evaluated the outcome of the extraction and expansion processes using these approaches and designed a combination of techniques to obtain the best results for the extracting keywords from Patents. For keyphrase expansion, I devised an algorithm that would make use of collocation based word similarity and provide expansions for phrases.
• Technologies involved: Java, Lucene, Apache SOLR

Jun 2013 – Aug 2013 · 2 mos · Walldorf, Germany

• Developed the first version of R2RML (RDB2RDF) mapping editor for fluid Operations. The editor is first of its kind user interface that enables users to create/manage R2RML mappings. It supports most of the R2RML language features. This work led to a poster and demo presentation at ISWC 2013 with me as the first author.
• Technologies involved: Semantic Web, Java, Mysql, Sesame api.

Jan 2011 – Aug 2015 · 4 yrs 7 mos · Wright State University

• As a research assistant I have worked on various research projects. Below are some of the key topics.
• Grounded Circumscription for OWL
• Introduced a new way of combining open world and closed world ontology modelling for the semantic web. This work is particularly interesting for applications having a domain ontology with data stored in a relational database where certain parts of the knowledge could be assumed to be complete. As a result intuitive facts could be inferred which would otherwise not be the case or may require more convoluted form of modelling when using only open world semantics. As a part of this research work we have also designed and developed an algorithm to perform ontology reasoning based on this semantics.
• A Defeasible Ontology Mapping Language
• Working towards a robust ontology mapping language to relate concepts from different ontologies. This language is intended to handle the heterogeneity between ontologies by cleverly managing the differences yet retaining the similarities among the concepts that syntactically appear to be the same thing but may have certain subtle semantic differences. To give a simple example consider the concept of marriage it may have small differences in the meaning based on the governing laws of the land where the concept is defined. Existing mapping languages are not equipped to handle such differences and may lead to inconsistent or incomplete knowledge. Initial results of this research has been published in JIST 2014. Current work involves improving the current results and working towards an efficient algorithmization.
• Ontology Reasoner implementation (In progress)
• Developing an efficient reasoner with the capabilities to inference under the semantics of grounded circumscription (theoretical tableau calculus is published in ISWC2011).

Mar 2008 – Dec 2010 · 2 yrs 9 mos · Pune Area, India

• Saba Software is a product company which provides LMS software to manage Learning, Talent, and Performance of an organization. My responsibilities included developing new functionalities, resolve issues and provide patches related to the area of Application Platform. Application Platform covers services that are used by other functionalities in the product. The services that I have maintained and improved are Caching Framework, Data Import, Security, Report Subscription. This involved working on JBOSS Application Server and coding using J2EE Technology and supporting multiple database vendors. During my work at Saba I fixed many cross-site scripting vulnerabilities in the system.

May 2006 – Mar 2008 · 1 yr 10 mos · Pune Area, India

• Infosys Technologies is one of the largest software services company in India. I was part of development team for a loan origination system for the client CapitalOne Auto Finance.
• My responsibilities included developing various functionalities for the loan origination system, from front end to back end that included writing java code, pl/sql procedures and functions for oracle and using the Savvion BPM system. I also developed framework features like access control, database logging and webservices for the application. For this project I used technologies like J2EE, weblogic, oracle, Savvion BPM.