NASA Scientific and Technical Aerospace Reports

work, we strongly favour a policy of retaining the original byte-stream (or possibly bit-stream, see below) as the master copy,
and evolving representation information (including software tools) over time to guarantee continued access to the intellectual
content of the preserved material. This paper attempts to justify that approach, and to argue for its technical feasibility and
economic good sense. Thus we need long-term stewardship of the byte-streams, and long-term stewardship of the
representation information. We use the term representation information in the sense of the OAIS model. The purpose of the
representation information is to give future access to the intellectual content of preserved byte-streams. Without stewardship
of the representation information we would not be exercising stewardship of the preserved data.
Derived from text
Technology Assessment; Policies; Economics; Management Systems
20040121050 National Oceanographic Data Center, Silver Spring, MD, USA
US National Oceanographic Data Center Archival Management Practices and the Open Archival Information System
Reference Model
Collins, Donald W.; NASA/IEEE MSST 2004 Twelfth NASA Goddard Conference on Mass Storage Systems and
Technologies in cooperation with the Twenty-First IEEE Conference on Mass Storage Systems and Technologies; April 2004,
pp. 329-343; In English; See also 20040121020; No Copyright; Avail: CASI; A03, Hardcopy
This paper describes relationships between the Open Archival Information System Reference Model (OAIS RM) and the
archival practices of the NOAA National Oceanographic Data Center (NODC). The OAIS RM defines a thorough approach
to defining the processes, entities, and framework for maintaining digital information in an electronic archival environment
without defining how to implement the framework. The NODC Archival Management System (AMS) is an example of an
implementation of a persistent digital archive. Major OAIS RM components, such as the Submission Information Package,
Archival Information Package, Dissemination Information Package, and Archival Storage are clearly comparable between the
OAIS RM and the NODC AMS. The main participants (Producer, Consumer, Management, and OAIS) are represented in the
NODC AMS, as are many primary functions (Ingest Process, Archive Process, Dissemination Process). Some important OAIS
RM components, such as a consistent Submission Agreement and a deeper level of Preservation Description Information may
be missing for some of the information archived in the NODC AMS. It is instructive to document the commonalities between
the NODC system and the OAIS RM as the NOAA National Data Centers expand archival services for a broad and growing
range of digital environmental data.
Author
Data Storage; Data Management; Information Systems
20040121056 California Univ., Santa Cruz, CA, USA
Evaluation of Efficient Archival Storage Techniques
You, Lawrence L.; Karamanolis, Christos; NASA/IEEE MSST 2004 Twelfth NASA Goddard Conference on Mass Storage
Systems and Technologies in cooperation with the Twenty-First IEEE Conference on Mass Storage Systems and Technologies;
April 2004, pp. 227-231; In English; See also 20040121020
Contract(s)/Grant(s): NSF CCR-03-10888; No Copyright; Avail: CASI; A01, Hardcopy
The ever-increasing volume of archival data that need to be retained for long periods of time has motivated the design
of low-cost, high-efficiency storage systems. Inter-file compression has been proposed as a technique to improve storage
efficiency by exploiting the high degree of similarity among archival data. We evaluate the two main inter-file compression
techniques, data chunking and delta encoding, and compare them with traditional intra-file compression. We report on
experimental results from a range of representative archival data sets.
Author
Data Storage; Information Management; Data Compression; Coding
20040121077 NASA Langley Research Center, Hampton, VA, USA
The NASA Technical Report Server
Nelson, Michael L.; Gottlich, Gretchen L.; Bianco, David J.; Paulson, Sharon S.; Binkley, Robert L.; Kellogg, Yvonne D.;
Beaumont, Chris J.; Schmunk, Robert B.; Kurtz, Michael J.; Accomazzi, Alberto, et al.; Internet Research: Electronic Network
Applications and Policy; 1995; Volume 5, No. 2, pp. 25-36; In English; Copyright; Avail: CASI; A03, Hardcopy
The National Aeronautics and Space Act of 1958 established NASA and charged it to ‘provide for the widest practicable
and appropriate dissemination of information concerning its activities and the results thereof.’ The search for innovative
methods to distribute NASA’s information lead a grass-roots team to create the NASA Technical Report Server (NTRS),
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