Calhoun: The NPS Institutional Archive - Dudley Knox Library

Nested Applications
Calhoun: The NPS Archive

Calhoun: The NPS Archive

Calhoun logo

Calhoun is the Naval Postgraduate School's archive for research materials and institutional publications created by the NPS community. 

Calhoun makes NPS-created scholarly content visible, searchable and freely available.  Contact us to get your NPS work into Calhoun.


Calhoun - Three Reasons

Three reasons your NPS research should be in Calhoun

  1. Broad exposure. Calhoun promotes visibility for your work. Content in Calhoun is indexed by Google Scholar and harvested by other repositories around the world.
  2. Stable links. Calhoun uses persistent "Handle" URLs, so links don't break. This includes search-based links that can show sets of records.
  3. Documentation you can use. It's easy to point to what you've worked on, advised, and published in one location.

One more reason . . . . The library does all the work! We can do everything from locating to digitizing to cataloging your NPS work for preservation and visibility.  Contact us to get your NPS work into Calhoun.


Learn More About Calhoun - Policies


What kind of documents are collected in the Institutional Archive?

Repository type

1. NPS Archive: Calhoun is an Institutional Archive (or Repository) for the Naval Postgraduate School.  It is based on DSpace open source software, and is for the purpose of making NPS-created scholarly content visible, searchable and freely available.

Collection policy

2. Some examples of items the NPS Institutional Archive may collect:

  • Bibliographies by NPS Librarians
  • Biographies of NPS faculty
  • Course syllabi, classroom lectures, presentations and support materials for teaching at NPS
  • Datasets related to NPS Research
  • Faculty Governance documents
  • Historical articles, publications and documents related to the establishment of NPS
  • Institutional Publications such as Annual Reports, Fact Book publications and promotional magazines
  • Journal articles by NPS Faculty and Researchers
  • Journal articles that resulted from NPS-funded projects
  • Masters Theses, Doctoral Dissertations and other degree-earning works from NPS and the Civilian Institutions (CIVINS) program.
  • Multimedia and audio-visual materials, including images, sound files and videos
  • NPS Course Catalogs
  • NPS Technical Reports/NPS Reports
  • Research materials including records of exhibitions, conferences and workshops
  • Conference Papers, Presentations and slidesets by NPS Faculty and Researchers
  • Unpublished reports and working papers

3. The Institutional Archive does not contain:

  • Institutional records
  • Items not cleared for unlimited distribution
  • Items not intended for public distribution
  • Items without a direct connection to NPS, except those items selected for inclusion in the collection, "Others Look at NPS"

4.  NPS Institutional Archive Content is added by:

  • The Archive manager
  • Dudley Knox Library staff from Metadata Services
  • Other trusted agents selected from Dudley Knox Library staff.

5. Principal Language:

  • English

Metadata Policy

For information describing items in the Institutional Archive

Access to metadata

1. Anyone may access the metadata free of charge

2. Metadata for documents in Calhoun is described in the Calhoun Application Profile

Re-use of metadata

2. The metadata may be re-used in any medium without prior permission.

Preservation Policy

For matters pertaining to addition, retention and preservation of items in the Institutional Archive

Retention policy

1. No retention period has been defined. It is the intention to retain all relevant items unless functional preservation becomes impracticable.

Functional preservation

2. The repository will try to ensure continued readability and accessibility.

File preservation

3. Calhoun content is backed up regularly according to current best practices.

Submission Policy

Concerning submission of items to the Institutional Archive, and for quality control of those items.

Documents and other items archived in the Calhoun Institutional Archive are placed in compliance with U.S. Copyright Law.   Because Calhoun is primarily an archive of NPS-created scholarly content, this means that much of its content, such as  NPS Theses and NPS Reports are works of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.

Eligible depositors

1.  Repository Content is added by:

  • The Institutional Archive manager
  • Dudley Knox Library staff from Metadata Services
  • Other trusted agents


2. The Calhoun administrators will vet items for valid metadata format and, where necessary, to enhance or correct metadata records.

Content Quality Control

3. The validity and authenticity of the content of submissions is not vetted or validated.


4. Items can be deposited at any time, but if an embargo is requested, will not be made publicly visible until the embargo period has expired.

Version control

5. Errata lists may be included with the original record if required.

6. If necessary, an updated version may be deposited. If this occurs, there will be links between earlier and later versions, with the most recent version clearly identified.  The reason for reissue will be marked clearly on the document's first page.

7. Items are allocated a checksum to facilitate the detection of alterations. 

8. Metadata in records is subject to update, correction and enhancement at any time.

Filetype Policy

For acceptable filetypes for inclusion in the Institutional Archive.

Calhoun can accept many filetypes for inclusion.  

Partial List of Acceptable Filetypes supported by DSpace

1. Adobe PDF; Image files such as WAV, GIF, JPEG, PNG, TIFF; HTML; Microsoft Excel,  Powerpoint, Word; Quicktime; Sound files such as MPEG Audio; video files such as MPEG Video, ZIP, Matlab.

Comprehensive List of Acceptable Filetypes supported by DSpace

2. DSpace filetypes list, by MIME type, documented by the DSpace community. (The actual list is much longer.  See the list of filetypes now in Calhoun.)

Copyright Policy

For copyright protection of items archived in Calhoun

Calhoun includes materials that are copyrighted as well as materials that are not subject to copyright in the US.

Calhoun is primarily an archive of NPS-created scholarly content, and some of its content, such as  NPS Theses and NPS Reports are works of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.  Other content, such as some NPS faculty publications, are subject to copyright protection under current U.S. Law.  Learn more about 17 USC 105: Subject matter of copyright: United States Government works.

For more information about Copyright and issues affecting the U.S. Government, see CENDI's Copyright and Intellectual Property workgroup's web page

Withdrawal / Takedown Policy


For matters pertaining to the subtraction of items in the Library's publicly accessible collections.

This policy addresses the potential removal of materials from any of the Dudley Knox Library’s publicly accessible collections. 

Under certain circumstances, public access to materials may be terminated. Reasons for doing so include but are not limited to:

  • Distribution is a clear violation of U.S. law (e.g., copyright law)
  • Continued public distribution would constitute harm to national security
  • Document contains information that has been deemed classified
  • Document is barred, or contains information that is barred, from public distribution by the Naval Postgraduate School, the Department of Defense or another Government organization
  • Document is published by the Naval Postgraduate School and does not meet the School’s guidelines for plagiarism, research methodology or integrity of research
  • Document contains Personally Identifiable Information (PII) or other Privacy Act data, as determined by the NPS Director of Cybersecurity and Privacy/DON-CIO Privacy Team
  • Document no longer supports the research or educational mission of the Naval Postgraduate School
  • Document is an exact duplicate of another item already in Calhoun

Materials falling into any of these categories may be brought to our attention to be considered for removal from public access. Contact us.

Additional note about  the subtraction of items in the Institutional Archive:

In order to preserve the historical record for items in Calhoun, the NPS Institutional Archive, withdrawals will be noted in the publicly viewable record. The content of this note reads this way:

You have reached the record for an item that has been removed.
This item was removed from view at the discretion of the Naval Postgraduate School.

Because any item in Calhoun that has existed at some time may have been cited, this "tombstone" record will stand for the removed item. 

Learn More About Calhoun - FAQs


How can I get my NPS work into Calhoun?

Contact us at the Dudley Knox Library!  We work fast, and can usually get permanent links to your work on the same day we hear from you. 

I found an NPS Thesis for sale online.  Is this legal?

It depends. If you are a US government employee, yes. Entities such as vendors using or other platforms may reformat it and sell it -- as long as they credit you as the author

If you are a non-US federal government employee, probably NO, but it depends on your contractual agreement with your employer/agency.  Check with your legal counsel and they can issue a cease-and-desist if it is not appropriate.  

If you are an International student, the answer depends on copyright law in your country.  

Read more about copyright as it applies to NPS students.

Can I get a list of all public release NPS thesis authors, titles, dates, abstracts, etc.?

Each quarter, we publish the metadata used by Calhoun for NPS theses, in spreadsheet format.

Each set includes everything that is in the records: author names, titles, advisor names, departments, abstracts, service affiliations, degree names, and more.

Note: register for an account with Calhoun to download records for individual items.




I found an error. How can I report it?

We appreciate knowing about corrections. Please contact us or Ask a Librarian to report an error or problem.

How do I find lists of Thesis Abstracts?

How do I find a list of theses I advised?

Try this search in Calhoun:


Use double quotes around your own last name. Add your first name after your last name, within the double quotes, for more precision. 

Note that author and advisor names in Calhoun items are expressed exactly as they appear in documents.  You may find your own work under variants.  Look on the right for REFINE BY: and choose Advisor. You will see your name variants there.

Please contact us or Ask a Librarian if you would like us to correct records to show your name in a specific way.

Why is it called "Calhoun"?

Photo of Ensign Guy K. Calhoun

The name of the NPS Digital Archive honors Professor Guy K. Calhoun (1889-1920), professor of Mathematics and the first appointed -- and published -- NPS scholarly author.

This earliest known appointment for a Naval Postgraduate School professor occurred on May 6, 1910 when the 61st Congress approved Ensign Guy K. Calhoun as “professor of mathematics in the navy.” [1]

Following his 1908 graduation from the Naval Academy, Prof. Calhoun made extensive computations to develop a set of mathemathics tables that proved to be highly useful to navigators. His work, Products of Arcs and Sines of 15-Degree Rhumbs was published by the Government Printing Office in 1910.  It remains in print to the present day.

Prof. Calhoun’s Congressional appointment, discovered by NPS Mathematics Faculty member Carlos Borges, sheds new light on the process of faculty hiring at Annapolis. (At the time of his appointment, NPS was called the School of Marine Engineering and was co-located with the Naval Academy at Annapolis.)

NPS Archive: Calhoun serves as a permanent and secure online home for scholarly work produced by NPS researchers. We are proud to commemorate Professor Guy K. Calhoun by lending his name to the archive.

1. U.S. House. Committee on Naval Affairs. Additional professor of mathematics in the Navy. (H. Rpt .830; Serial Set 5597). March 25, 1910. Text in: ProQuest Congressional Serial Set Digital Collection; Accessed: December 22, 2014.  

Can't find a thesis or dissertation?

Remember, Calhoun contains items for public access only.  Registered users can check the Restricted Collection for restricted items newer than 2001. Registration is available only to U.S. military, U.S. government employees and contractors who are members of the NPS community. (Learn more about Restricted Resources, and how to find items previous to 2001.   Still not sure why you can't find an NPS thesis?  Ask a Librarian or Contact us.

Most Popular Items statistics

Calhoun offers statistics about downloads and views for each item in the repository. Scroll down to "Show Statistical Information".  To see Calhoun's "Most Popular" and "Statistics by Country" features, look on the left on any collection page, and adjust the drop-down menus for the information you need.

NOTE: statistics in Calhoun reflect figures collected since August 2014, when the DSpace platform software was upgraded. (Calhoun opened in April 2012.)

We welcome data in the Calhoun repository, and if you wish, can add it to the same record that presents your published work. Independent datasets are welcome, too. Explore our datasets collection.

We are aware that researchers may wish to publish their data in a number of venues.  Calhoun is one possibility, especially for data related to published works in Calhoun.  

We can publish your data ahead of publication, "in place" (if you would like a link to include in a work going to press)or in the same record as the published work. We are glad to work with you.

Find out more about the Data Management Plan process for NPS authors:

Calhoun Disclaimer
Content in Calhoun is made available for the purpose of peer review and discussion and does not necessarily reflect the views of the Department of the Navy or the Department of Defense. Calhoun includes materials that are copyrighted as well as materials that are not subject to copyright in the US. 
My Accounts, AAL - Utility Links
A Long Tradition of NPS Research

Image of faculty member Dr. Rudolph Panholzer and graduate stucent presenting 1966 thesis research

Then-new faculty member Dr. Rudolph Panholzer and graduate student bring NPS research to a Michigan State University audience in 1966. Want to see exactly what they were presenting? Calhoun has it.

NPS Archive: Calhoun - Contacts & Links

Contact Us

Ask A Librarian
Floor Map

You might also be interested in...