16,515 research outputs found
Dynamic Web File Format Transformations with Grace
Web accessible content stored in obscure, unpopular or obsolete formats
represents a significant problem for digital preservation. The file formats
that encode web content represent the implicit and explicit choices of web site
maintainers at a particular point in time. Older file formats that have fallen
out of favor are obviously a problem, but so are new file formats that have not
yet been fully supported by browsers. Often browsers use plug-in software for
displaying old and new formats, but plug-ins can be difficult to find, install
and replicate across all environments that one may use. We introduce Grace, an
http proxy server that transparently converts browser-incompatible and obsolete
web content into web content that a browser is able to display without the use
of plug-ins. Grace is configurable on a per user basis and can be expanded to
provide an array of conversion services. We illustrate how the Grace prototype
transforms several image formats (XBM, PNG with various alpha channels, and
JPEG 2000) so they are viewable in Internet Explorer.Comment: 12 pages, 9 figure
Digital Preservation Services : State of the Art Analysis
Research report funded by the DC-NET project.An overview of the state of the art in service provision for digital preservation and curation. Its focus is on the areas where bridging the gaps is needed between e-Infrastructures and efficient and forward-looking digital preservation services. Based on a desktop study and a rapid analysis of some 190 currently available tools and services for digital preservation, the deliverable provides a high-level view on the range of instruments currently on offer to support various functions within a preservation system.European Commission, FP7peer-reviewe
Technical alignment
This essay discusses the importance of the areas of
infrastructure and testing to help digital preservation services
demonstrate reliability, transparency, and accountability. It
encourages practitioners to build a strong culture in which
transparency and collaborations between technical frameworks
are valued highly. It also argues for devising and applying
agreed-upon metrics that will enable the systematic analysis of
preservation infrastructure. The essay begins by defining
technical infrastructure and testing in the digital preservation
context, provides case studies that exemplify both progress and
challenges for technical alignment in both areas, and concludes
with suggestions for achieving greater degrees of technical
alignment going forward
An Infrastructure for the Dynamic Distribution of Web Applications and Services
This paper presents the design and implementation of an infrastructure that enables any Web application, regardless of its current state, to be stopped and uninstalled from a particular server, transferred to a new server, then installed, loaded, and resumed, with all these events occurring "on the fly" and totally transparent to clients. Such functionalities allow entire applications to fluidly move from server to server, reducing the overhead required to administer the system, and increasing its performance in a number of ways: (1) Dynamic replication of new instances of applications to several servers to raise throughput for scalability purposes, (2) Moving applications to servers to achieve load balancing or other resource management goals, (3) Caching entire applications on servers located closer to clients.National Science Foundation (9986397
1st INCF Workshop on Sustainability of Neuroscience Databases
The goal of the workshop was to discuss issues related to the sustainability of neuroscience databases, identify problems and propose solutions, and formulate recommendations to the INCF. The report summarizes the discussions of invited participants from the neuroinformatics community as well as from other disciplines where sustainability issues have already been approached. The recommendations for the INCF involve rating, ranking, and supporting database sustainability
Long term digital preservation
The field of digital preservation is being defined by a set
of standards developed top-down, starting with an abstract reference
model (OAIS) and gradually adding more specific detail. Systems
claiming conformance to these standards are entering production use.
Work is underway to certify that systems conform to requirements
derived from OAIS.
The fundamental goal of these systems is to ensure that the
information they contain remains accessible for the long term. We
develop a parallel set of requirements based on observations of how
existing systems handle this task, and on an analysis of the threats to
achieving that goal. On this basis we suggest disclosures that systems
should provide as to how they satisfy their goals
DGD Gallery: Storage, sharing, and publication of digital research data
We describe a project, called the "Discretization in Geometry and Dynamics
Gallery", or DGD Gallery for short, whose goal is to store geometric data and
to make it publicly available. The DGD Gallery offers an online web service for
the storage, sharing, and publication of digital research data.Comment: 19 pages, 8 figures, to appear in "Advances in Discrete Differential
Geometry", ed. A. I. Bobenko, Springer, 201
Audiovisual preservation strategies, data models and value-chains
This is a report on preservation strategies, models and value-chains for digital file-based audiovisual content. The report includes: (a)current and emerging value-chains and business-models for audiovisual preservation;(b) a comparison of preservation strategies for audiovisual content including their strengths and weaknesses, and(c) a review of current preservation metadata models, and requirements for extension to support audiovisual files
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