4,033 research outputs found
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
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
An ontology-based consultation system to support medical care on board seagoing vessels
Background: A realistic possibility to obtain medical care for patients located in remote sites such as seagoing vessels, in which health professionals are not available, is to contact a doctor via telecommunication systems. In general, the medical knowledge of who on board ships is in charge of medical care is quite limited and therefore, in a first level telemedical consultation, the flow of information should be correct and its efficiency should be maximised. This paper describes an application conceived to improve requests of medical assistance from sailing ships. The ultimate objective of this system is a) to standardise as much as possible the requests of medical advice at a distance, b) to overcome language barriers and jammed-related troubles that could make difficult or not understandable a telephone conversation.
Materials and methods: The application is based on a software engine extracting data from an ontological knowledgebase built ad hoc using Protégé.
Results: Compared to the conventional consultation systems based on telephone and e-mail, the proposed device is more accurate and complete in terms of information contained in the request of assistance. Moreover, data received by the medical centre can be more easily managed, as they can be standardised.
Conclusions: The system described here allows people responsible of medical care on board ships to forward detailed requests of assistance containing symptom-guided information on patient clinical conditions. This may represent an innovative tool for medical consultations at distance allowing the remote centre to provide more precise and quicker medical advice.
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