Sudarshan S. Chawathe

• Research Interests:
  diverse topics in data management, especially big data, data mining and machine learning, scientific data, semi-structured data and XML, information integration, streaming query processing, data mining, differencing, change management, intelligent transportation systems, peer-to-peer systems, service-oriented and Web architectures, and mobile applications.
  [Consult publications for more.]
• Contact Information:
  • Updates: (None, but please watch this space.)
  • Office: Boardman Hall, Room 329.
  • Office hours for Spring 2025 semester: Please check for changes.
    
    • Mondays, Wednesdays, Fridays (in Boardman 329):
      • 09:30 a.m. — 09:50 a.m.
      • 11:00 a.m. — 11:30 a.m.
  • Jitsi: Use meeting ID Taxi Taxi followed by the famous number of a taxicab (or create your own meeting and send me the information by email).
  • Zoom: If you cannot part with your zooming ways, you may use my last name as meeting ID. A better option is Jitsi.
  • Phone: +1-207-581-3930. Email is much preferred.
  • Fax: +1-207-581-4977. Avoid; check with me before use.
  • Email: sudarshan.chawathe@maine.edu.
    I do not accept email attachments in proprietary formats.
  • GPG(GnuPG)/PGP public key (ASCII armored, updated 2023-09-20).
    Key fingerprint = 5C8C 2445 1671 0241 607D 53C9 FBEB AB5A 33B5 BB17
    Or check the OpenPGP or MIT keyservers.
  • Send Bitcoin to: 1chaw1Ro86rtyj6Ew8kT5codUFCqYUm4j
  • Mailing address:

    	      School of Computing and Information Science
    	      5711 Boardman Hall, Room 348
    	      University of Maine
    	      Orono, ME 04469-5711, USA
    	    

  • Biographical sketch.
• Classes:
  • Spring 2025 semester:
    • Programming Languages (COS 301).
    • Advanced Topics in Computer Science (COS 598-0002).
  • Archive:
    • Introduction to C++ Programming (COS 220): Spring 2023.
    • Data Structures in C++ (COS 221): Fall 2020.
    • Introduction to Data Structures (COS 226): Fall 2018; Fall 2017; Fall 2016; Fall 2015; Fall 2014; Fall 2013; Fall 2012; Fall 2011; Fall 2010; Fall 2009; Fall 2008; Fall 2007.
    • Computer Architecture (COS 235): Fall 2024.
    • Programming Languages (COS 301): Spring 2024. Fall 2023. Spring 2023.
    • Data Structures and Algorithms (COS 454, COS 350): Fall 2023; Fall 2022; Fall 2021; Spring 2021; Spring 2019; Spring 2018; Spring 2017; Spring 2016.
    • Automata, Computability, and Languages (COS 451). Fall 2024; Spring 2022; Spring 2021; Fall 2019; Spring 2018; Spring 2014; Spring 2013.
    • Database Management Systems (COS 480): Fall 2021; Fall 2019; Spring 2016; Fall 2013; Fall 2012; Fall 2011; Fall 2010; Fall 2009; Fall 2008; Fall 2007; Fall 2006; Fall 2005; Spring 2005. Fall 2004: Fall 2003; Fall 2002; Fall 2001; Fall 2000; Fall 1999; Spring 1999.
    • Advanced Topics in Database Systems: Spring 2007; Spring 2006; Spring 2004; Spring 2003; Spring 2002; Spring 2001; Spring 2000.
    • Capstone 1 (COS 397): Fall 2016; Fall 2014; Fall 2013; Spring 2013; Spring 2012; Spring 2011; Spring 2010; Spring 2009; Spring 2008.
    • Capstone 2 (COS 497): Spring 2015; Spring 2014; Fall 2013; Spring 2013; Fall 2012; Spring 2012; Fall 2011; Spring 2011; Fall 2010; Spring 2010; Spring 2009; Spring 2008.
    • Theoretical Computer Science I (COS 550): Fall 2024. Spring 2018.
    • Data Mining in Earth Sciences (ERS 602).
    • Topics in Computer Science: Quantum Computation (Fall 2010 COS 498-0001).
    • Cyberinfrastructure for Climate Change Research (COS 598, special topics) Spring 2010.
    • An Honors Tutorial on Literate Programming and Programming Fundamentals (HON 313).
    • Database Module for Computational Methods in Genomics (MAT 500)
    • Webology/XML (CMSC 828C); Fall 1999.
• Projects:
  • National Research Traineeship (NRT): Ecosystem science in the face of rapid ocean change: a convergence approach. Applicants welcome; see linked site for information.
  • Project 301: Cyberinfrastructure for Climate-Change Research.
    NSF EAR-1027960.
  • Older: XSQ; SEuS. VQBD. Cextor; NSF: IIS-0081860; IIS-9984296.
• Publications:
  A list with links to abstracts, papers, and citations.
• Miscellany:
  • An updated version of the NewsPortal program for reading NNTP news (USENET) using a Web browser. on Codeberg (preferred) and GitLab.
  • square-limit pictures from SICP in Kawa Scheme on Codeberg (preferred) and GitLab.
  • stdiff: a simple tree comparison program.
  • A modified htmlslide program for generating HTML- and CSS- based slideshows for pictures.
  • Capstone material: Capstone Guide; Capstone Proposals.
  • A simple implementation of Shellsort in Ruby.
  • Maine driving directions.