A Service Component Model and Implementation for Institutional Repositories - Advanced Design Approaches to Emerging Software Systems - page 64

2. RELATED WORKS point of view, we regard that the value of a digital

resource to not only be decided by the author,
but also enhanced by its users. For example, on
Flickr.com, a picture is annotated with social tags
which are relevant keywords associated with or
assigned to a piece of information (e.g., a Web
page), describing the item and enabling keyword-
based classification (Chirita et al. 2007). The
tags are more precise to describe the content of
the photo and provide an up-to-date taxonomy
(Hunter et al. 2008) (Marlow et al. 2006). While
emergent semantics of social tagging are used to
help evaluate similarity measures (Markines et
al. 2009), we emphasize the participation of users
and support them by importing social annotations
such as tags, scores and comments.
Our overall goal is to both enrich the value of
the digital resources with user-generated-content
and also help users find required digital resources.
To achieve the second target, we have to find what
they want, this is, the users' interests. The interests
of the users can be expressed in two ways: explicit
and implicit expressions. The explicit expressions
are provided by the users (i.e., keywords list)
while the implicit expressions are the records of
the users' actions such as click-streams, and pre-
viously used resources. In addition, annotations
help discover the users' interests by calculating
the similarities between digital resources and
between users (Sen et al. 2009) (Aurnhammer et
al. 2006) (Song et al. 2008).
This paper is organized into eight sections.
The second section discusses the related work.
A Digital Resource Service Component model is
depicted in section 3. Section 4 describes the archi-
tecture supporting DRSC model. The design and
implementation of the clouds are given in section
5. In section 6, the tool and process of building an
IR are described in details. And section 7 comes
the system requirements and installation. The
last sections are the future work and conclusion.

There are many well-known platforms and pro-
grams available to help institutions build their own
repositories, such as DSpace 1 , Fedora Commons 2
and EPrints 3 to name a few. However, they have to
maintain the whole systems on the basis of these
platforms and programs which is not what we call
cloud services. To the best of our knowledge, there
are only two Institutional Repository projects try-
ing to bring in the advantages that cloud services
provide: Fedorazon 4 and DuraCloud 5 .
Fedorazon is an out-of-the-box version of the
Fedora Commons repository software that comes
preconfigured for installation in the Cloud. It
regards that a Cloud Repository is Fedora Com-
mons Repository plus Amazon Web Services
(i.e., Fedora + Amazon = Fedoarzon). The Aim
of project Fedorazon is to enhance the content
of repositories throughout the UK's HE and FE
sector by providing solutions for the scalability of
repositories as they grow in size and complexity.
As a rapid innovation project, it looks to remove
the “hardware” barriers involved in launching and
maintaining a repository. It accomplishes this by
enabling the use of Fedora Commons repository
software on-top-of Amazon's virtual servers (EC2
& S3). By pre-configuring these servers, any HE/
FE institution can “rent” Amazon server space and
launch their own secure Fedora repository without
having to pre-configure a local server within their
institution. In short, institutions can launch their
repository service on the same day they decide to
have one, and without hiring a “hardware” expert.
To pursue a common mission, Fedora Com-
mons and the DSpace Foundation merged into
DuraSpace. DuraSpace is committed to serving
the creators and stewards of scholarly, scientific,
and cultural heritage by providing technologies
and services that help to ensure that digital content
is accessible over the long term. Accordingly, the
DuraSpace technology portfolio inherently ad-
dresses the issue of durability of digital content.
DuraCloud is a hosted service and open technol-