147,441 research outputs found
From a Link Semantic to Semantic Links - Building Context in Educational Hypermedia
Modularization and granulation are key concepts in educational content
management, whereas teaching, learning and understanding require a discourse
within thematic contexts. Even though hyperlinks and semantically typed
references provide the context building blocks of hypermedia systems, elaborate
concepts to derive, manage and propagate such relations between content objects
are not around at present. Based on Semantic Web standards, this paper makes
several contributions to content enrichment. Work starts from harvesting
multimedia annotations in class-room recordings, and proceeds to deriving a
dense educational semantic net between eLearning Objects decorated with
extended LOM relations. Special focus is drawn on the processing of recorded
speech and on an Ontological Evaluation Layer that autonomously derives
meaningful inter-object relations. Further on, a semantic representation of
hyperlinks is developed and elaborated to the concept of semantic link
contexts, an approach to manage a coherent rhetoric of linking. These solutions
have been implemented in the Hypermedia Learning Objects System (hylOs), our
eLearning content management system. hylOs is built upon the more general Media
Information Repository (MIR) and the MIR adaptive context linking environment
(MIRaCLE), its linking extension. MIR is an open system supporting the
standards XML and JNDI. hylOs benefits from configurable information
structures, sophisticated access logic and high-level authoring tools like the
WYSIWYG XML editor and its Instructional Designer.Comment: Summary of several conference article
Hypermedia Learning Objects System - On the Way to a Semantic Educational Web
While eLearning systems become more and more popular in daily education,
available applications lack opportunities to structure, annotate and manage
their contents in a high-level fashion. General efforts to improve these
deficits are taken by initiatives to define rich meta data sets and a
semanticWeb layer. In the present paper we introduce Hylos, an online learning
system. Hylos is based on a cellular eLearning Object (ELO) information model
encapsulating meta data conforming to the LOM standard. Content management is
provisioned on this semantic meta data level and allows for variable,
dynamically adaptable access structures. Context aware multifunctional links
permit a systematic navigation depending on the learners and didactic needs,
thereby exploring the capabilities of the semantic web. Hylos is built upon the
more general Multimedia Information Repository (MIR) and the MIR adaptive
context linking environment (MIRaCLE), its linking extension. MIR is an open
system supporting the standards XML, Corba and JNDI. Hylos benefits from
manageable information structures, sophisticated access logic and high-level
authoring tools like the ELO editor responsible for the semi-manual creation of
meta data and WYSIWYG like content editing.Comment: 11 pages, 7 figure
Sharing Linkable Learning Objects with the use of Metadata and a Taxonomy Assistant for Categorization
In this work, a re-design of the Moodledata module functionalities is
presented to share learning objects between e-learning content platforms, e.g.,
Moodle and G-Lorep, in a linkable object format. The e-learning courses content
of the Drupal-based Content Management System G-Lorep for academic learning is
exchanged designing an object incorporating metadata to support the reuse and
the classification in its context. In such an Artificial Intelligence
environment, the exchange of Linkable Learning Objects can be used for dialogue
between Learning Systems to obtain information, especially with the use of
semantic or structural similarity measures to enhance the existent Taxonomy
Assistant for advanced automated classification
SWA-KMDLS: An Enhanced e-Learning Management System Using Semantic Web and Knowledge Management Technology
In this era of knowledge economy in which knowledge have become the most precious
resource, surveys have shown that e-Learning has been on the increasing trend in various
organizations including, among others, education and corporate. The use of e-Learning is
not only aim to acquire knowledge but also to maintain competitiveness and advantages
for individuals or organizations. However, the early promise of e-Learning has yet to be
fully realized, as it has been no more than a handout being published online, coupled with
simple multiple-choice quizzes. The emerging of e-Learning 2.0 that is empowered by
Web 2.0 technology still hardly overcome common problem such as information
overload and poor content aggregation in a highly increasing number of learning objects
in an e-Learning Management System (LMS) environment.
The aim of this research study is to exploit the Semantic Web (SW) and Knowledge
Management (KM) technology; the two emerging and promising technology to enhance
the existing LMS. The proposed system is named as Semantic Web Aware-Knowledge
Management Driven e-Learning System (SWA-KMDLS). An Ontology approach that is
the backbone of SW and KM is introduced for managing knowledge especially from
learning object and developing automated question answering system (Aquas) with
expert locator in SWA-KMDLS. The METHONTOLOGY methodology is selected to
develop the Ontology in this research work.
The potential of SW and KM technology is identified in this research finding which will
benefit e-Learning developer to develop e-Learning system especially with social
constructivist pedagogical approach from the point of view of KM framework and SW
environment. The (semi-) automatic ontological knowledge base construction system
(SAOKBCS) has contributed to knowledge extraction from learning object semiautomatically
whilst the Aquas with expert locator has facilitated knowledge retrieval
that encourages knowledge sharing in e-Learning environment.
The experiment conducted has shown that the SAOKBCS can extract concept that is the
main component of Ontology from text learning object with precision of 86.67%, thus
saving the expert time and effort to build Ontology manually. Additionally the
experiment on Aquas has shown that more than 80% of users are satisfied with answers
provided by the system. The expert locator framework can also improve the performance
of Aquas in the future usage.
Keywords: semantic web aware – knowledge e-Learning Management System (SWAKMDLS),
semi-automatic ontological knowledge base construction system (SAOKBCS),
automated question answering system (Aquas), Ontology, expert locator
Promoting accessibility by using metadata in the framework of a semantic-web driven CMS
Web content accessibility for impaired people has
been mainly addressed by the Web Content
Accessibility Guidelines (WCAG) developed by the
Web Accessibility Initiative (WAI) of the W3C
Consortium. Those guidelines have proved to be good
diagnostic means for testing accessibility for different
types of impairments, as well as for guiding the
development of accessible content. A further step
would be to promote discovery of material having
appropriate accessibility support, as well as the
adjustment of control and display of resources to meet
user accessibility needs and preferences [5]. The last
two challenges have been addressed by the IMS
Global Learning Consortium in the IMS-AccessForAll
(ACCMD) and the IMS Learner Information Profile
(ACCLIP) specifications. Although IMS has
approached both goals in a learning framework, both
accessibility specifications pay a special attention to
impaired users’ needs. As a first step, in this paper we
survey how far IMS accessibility specifications cover
WCAG, and discuss the convenience of extending it to
the whole WAI guidelines. Secondly, we argue how
accessibility could be considered as a key issue for
promoting reusability. We continue explaining why
using a semantic framework (such as the MPEG-7
semantic tool, RDF or OWL) for describing textual
and contextual information in a standardized manner
could promote both, accessibility and reusability.
Finally, we explain how some accessibility issues
have been already addressed by XimetriX’s ximDEX,
a semantic-web Content Management System (CMS).
We conclude proposing a plan to better integrate the
accessibility specifications and contextual description
tools into that CMS
The Knowledge Life Cycle for e-learning
In this paper, we examine the semantic aspects of e-learning from both pedagogical and technological points of view. We suggest that if semantics are to fulfil their potential in the learning domain then a paradigm shift in perspective is necessary, from information-based content delivery to knowledge-based collaborative learning services. We propose a semantics driven Knowledge Life Cycle that characterises the key phases in managing semantics and knowledge, show how this can be applied to the learning domain and demonstrate the value of semantics via an example of knowledge reuse in learning assessment management
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