http://www.sti.nasa.gov/find-sti/#.VnmJnMpzri9
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`Find STI - NASA Scientific and Technical Information (STI) Pr...
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`Find STI
`
`Discover ways to find, locate, and access publicly available NASA STI. This page contains information
`about the NASA Technical Reports Server (NTRS), links to NTRS training videos, harvesting NASA
`STI, and links to other STI resources.
`
`Collapse All | Expand All
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`About NASA Technical Reports Server (NTRS)
`
`NASA Technical Reports Server (NTRS) provides access to aerospace-related citations,
`full-text online documents, and images and videos. The types of information include:
`conference papers, journal articles, meeting papers, patents, research reports, images, movies,
`and technical videos – scientific and technical information (STI) created or funded by NASA.
`
`The NTRS integrates the following three NASA collections and enables search and retrieval
`through a common interface:
`
`NACA Collection: Citations and reports from the National Advisory Committee for
`Aeronautics period lasting from 1915 to 1958.
`NASA Collection: Citations and documents created or sponsored by NASA starting in
`1958 and continuing to the present.
`NIX Collection: Citations and links to the images, photos, movies, and videos from the
`discontinued NASA Image eXchange (NIX).
`
`Please see NASA Disclaimers, Copyright Notice, and Terms and Conditions of Use for
`information on how to use NASA’s scientific and technical information.
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`NTRS News
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`January 16, 2015 Updated STI Contact Information
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`The new STI address is:
`NASA STI Program
`STI Support Services
`Mail Stop 148
`NASA Langley Research Center
`Hampton, VA 23681-2199
`Fax: 757-864-6500
`
`Information Desk is:
`help@sti.nasa.gov or HQ-STI-INFODESK@mail.nasa.gov
`757-864-9658
`
`September 13, 2013 Updates to RSS and Twitter Notices on New Content Frozen
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`Due to an on-going, major system transition, no new documents are currently being added to
`the NTRS. The RSS feed and Twitter updates about new content to NTRS will resume by
`mid-November.
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`September 10, 2013 Update to June 5, 2013 Questions and Answers on NTRS
`
`On September 6, 2013, after export control analysis, nearly 138K documents were reloaded to
`the NASA Technical Reports Server (NTRS). This action more than doubles the full-text STI
`content available from NTRS and represents 75% of the full-text available prior to the NTRS
`going off-line in March 2013. The STI Program Office, in conjunction with the Export Control
`Program, will continue to assess the remaining content and release documents deemed
`publically available.
`
`June 15, 2013 The NASA Technical Reports Server (NTRS) has received an update!
`
`The update provided:
`
`A new fresh, clean look for users
`Enhanced record display that shows author affiliations, sponsorship, and document type
`A new Search History display that lists all searches conducted during a search session,
`and allows users to quickly recall a previous search for display or further refinement
`Ability to search organization names from the advanced search form
`Ability to flag multiple records of interest from a search-results display, and create a new
`set containing the flagged items
`
`June 5, 2013 Questions and Answers on NTRS
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`Background:
`
`On March 20, 2013, the NASA Administrator directed that the NASA Technical Reports Server
`(NTRS) be taken off-line while the Agency conducted a review of whether there is a risk of
`export-controlled documents being made available on the NTRS website. During this review,
`NASA provided the following public notice:
`“The NASA technical reports server will be unavailable for public access while the agency
`conducts a review of the site’s content to ensure that it does not contain technical information
`that is subject to U.S. export control laws and regulations and that the appropriate reviews were
`performed. The site will return to service when the review is complete. We apologize for any
`inconvenience this may cause.”
`Across the succeeding weeks, teams of personnel from the NASA Center for AeroSpace
`Information (CASI) and NASA Scientific and Technical Information Program Office (STIPO)
`have validated approximately 966,460 documents and metadata records from the NASA
`Technical Reports Server (NTRS) to ensure that all have received proper review and approval
`for public release, including required export control reviews for those NTRS records that
`comprise scientific and technical information. On May 8, 2013, the NTRS was brought back
`on-line for public access, reloaded with the validated 966,460 documents and metadata
`records. A small subset of approximately 248,000 documents, largely consisting of older
`documents, such as National Advisory Committee on Aeronautics materials, remain to be
`reviewed and will not be restored to public access until a thorough review is completed.
`
`Responses to Questons:
`
`
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`Why was the technical reports server taken down?1.
`
`Between March 20, 2013, and May 8, 2013, the NASA Technical Reports Server was
`unavailable for public access while the Agency conducted a review of the site’s content
`to ensure that the appropriate reviews were performed and that it does not contain
`technical information subject to U.S. export control laws and regulations.
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`
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`Why has NASA now brought the technical reports server back-up?2.
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`On May 8, 2013, the NASA Technical Reports Server was brought back on-line for public
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`access after the review and confirmation of approximately 966,460 records, images, and
`documents as having been properly screened and certified for public release.
`
`
`How many records have been reviewed and certified for posting on the technical reports3.
`server? How many have yet to be reviewed and certified for return to the technical
`reports server? When will they be posted?
`
`As of May 8, 2013, the NASA Technical Reports Server contains more than 966,460
`records, images, and documents for public research purposes. A subset of
`approximately 248,000 documents, largely consisting of older documents, including
`National Advisory Committee on Aeronautics (NACA) materials, remain to be reviewed,
`and they will be loaded back to the NASA Technical Reports Server as soon as the
`reviews are completed by the originating NASA Centers.
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`NTRS Training via YouTube
`
`The STI Program provides training videos to help users become more familiar with the features
`and functions of the NTRS. Users can access these tutorials via the NASA STI YouTube
`Channel to learn on-demand and at their own pace.
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`Harvesting Data from NTRS
`
`NTRS promotes the dissemination of NASA STI to the widest audience possible by allowing
`NTRS information to be harvested by sites using the Open Archives Initiative Protocol for
`Metadata Harvesting (OAI-PMH). OAI-PMH defines a mechanism for information technology
`systems to exchange citation information using the open standards HTTP (Hypertext Transport
`Protocol) and XML (Extensible Markup Language). NTRS is designed to accept and respond to
`automated requests using OAI-PMH. Automated requests only harvest citation information and
`not the full-text document images.
`
`If you are interested in harvesting from NTRS, please fill out the brief OAI Harvester Information
`form so that the STI Program can notify you of any changes related to the OAI service or
`content. Also note the changes to the available record formats below.
`
`Sites interested in harvesting from NTRS should review the following guidance before
`harvesting:
`
`Use of Government Information
`The NTRS serves out unlimited, unclassified, publicly available NASA citations and full-text
`documents (PDFs). Persons, organizations, and sites interested in obtaining NASA information
`should review Disclaimers, Copyright Notice, Terms and Conditions of Use for guidance.
`
`Harvesting Images
`NTRS actively blocks spidering, robots, and intelligent agents from automatically retrieving the
`full-text images. Links to full-text documents (PDFs) are included in the citations. The URL
`image link in the harvested NTRS metadata is a way for your users to access the full-text
`document image residing on NTRS.
`
`Harvesting Metadata Citations
`The NTRS is an OAI-compliant data provider. OAI-PMH is an implementation of the
`Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH), a standard for
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`retrieving metadata from digital document repositories.
`NTRS supports OAI-PMH version 2.0. It does not support earlier versions of the protocol.
`The base URL for the NTRS is http://ntrs.nasa.gov/
`An OAI request for harvesting from NTRS will return a maximum of 100 records per
`request. If you plan on harvesting more than 100 records, please run those requests
`between 8PM-8AM U.S. Eastern Time. Do not make more than one request every 3
`seconds.
`Users can harvest the NTRS data by sending an OAI compliant request to the NTRS
`archive. The request URL is formatted as http://ntrs.nasa.gov/oai?verb=XXX (where XXX
`is the verb value). There are several valid verb values that provide useful information.
`Identify = Provides a description of the NTRS repository
`ListMetadataFormats = Gives the metadata format(s) available for request from
`NTRS
`ListSets = Provides a list of the NTRS defined sets. These results can help refine
`your request by asking for one specific set of data versus the entire NTRS
`collection
`ListIdentifiers = Gives a list of the OAI unique identifiers available within NTRS
`ListRecords = Gives a listing of N records at a time. NTRS is currently set to give
`100 records at a time with a Resumption Token at the end if more records are
`available for the request received
`GetRecord = Will provide the user the XML file for a specific record
`Records may be harvested from NTRS in the following formats: oai_dc and casi_dc — a
`more inclusive record format based on Dublin Core and supplemented with NASA terms.
`For more information, see the field description document for the casi_dc format, and the
`schema references returned from the following request: http://ntrs.nasa.gov
`/oai?verb=ListMetadataFormats.
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`Updated, Modified, and Deleted Citations and Full-Text Documents
`Over time, metadata citations and full-text document images may be updated, modified, and/or
`deleted as a result of regular data management. The best method to detect changes in NTRS
`information is regular harvesting of NTRS using OAI-PMH. Newly updated and/or modified
`records will automatically replace previously harvested records. Records marked as ‘deleted’
`will take additional processing on your site to detect NASA citations that should be deleted from
`your repository.
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`Related Content
`
`The following links provide resources for users who would like to find more information from
`NASA and beyond. These links open in a new window.
`
`Aeronautics Research Mission Directorate
`Astronaut Photography
`Human Exploration & Operations Mission Directorate
`Life Sciences Data Repositories at NASA Johnson Space Center
`NASA Education Program
`NASA Guidelines for Quality of Information
`NASA History Office
`NASA Images at Internet Archive
`NASA Knowledge Management
`NASA Multimedia Gallery
`NASA TechFinder
`NASA Technical Standards Program
`NASA/IPAC Extragalactic Database (NED)
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`NASA Online Directives Information System (NODIS)
`Office of the Chief Technologist
`Science Mission Directorate
`Solar System Exploration
`Space Technology Mission Directorate
`Spinoff
`TechPort
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