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Laboratorio de Investigación en Videojuegos y E-Learning. GEDES - UGR. A Model Based on Semantic Nets to Support Evolutionary and Adaptive Hypermedia Systems. N. Padilla Zea M. Medina Medina M. J. Cabrera F. Molina Ortiz L. García Cabrera. Summary. Introduction SEM-HP Results
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Laboratorio de Investigación en Videojuegos y E-Learning GEDES - UGR A Model Based on Semantic Nets to Support Evolutionary and Adaptive Hypermedia Systems N. Padilla Zea M. Medina Medina M. J. Cabrera F. Molina Ortiz L. García Cabrera
Summary • Introduction • SEM-HP • Results • Conclusions and further work Laboratorio de Investigación en Videojuegos y E-Learning
Introduction AHS (Student perspective) Associativeretrieval of information Changesnotonuser’sdemand Diversity of formats Users should have control over when and how adapt Severalwaystoaccessinformation Adjusttouser’sneeds Forcetoreadprerrequisites Reduce desorientation Allow different types of navigation Reduce knowledgeoverloading Laboratorio de Investigación en Videojuegos y E-Learning
Introduction AHS (Author perspective) Building more complexthan non-adaptivesystems Provide author tools Provide mechanisms to make changes easier and consistent Lifecycleisnotgivenimportanceenough SEM-HP (SEMantic, Systemic and Evolutionary model to develop HyPermedia Systems) Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP • Design and development based on a cognitive model • Development, maintenance and navigation easier and flexible • Design in four phases to separate domain modelling, presentation, navigation and adaptation Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP Divide-and-conquer strategy Guidelines regarding Soft. Eng. • Three elements to develop AHS • Development process • Architecture • Author tool Four phases: Memorization Presentation Navigation Learning Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP • The author specifies: • Information domain • Set of items associated to concepts in the concept domain • Underlying conceptual domain • To make semantic relations explicit • Concepts to classify information items • Concept: Idea, though or abstraction Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP The author selects different presentations or views of the knowledge domain obtained in the memorization phase Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP The author establishes how the user can navigate the available information items Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP Question about adaptation: What, who, how and when to adapt The author established mechanism to allow system to adjust to user’s characteristics and interests Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP These phases are iterative Evolutionary development because phases are able to integrate changes Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP • Vertical division • 4 related subsystems • Horizontal division • 2 layers for each subsystem • System: Representation models designed during each development phase • Meta-system: Evolutionary mechanisms to integrate and propagate changes • Evolutionary actions • Restrictions • Change propagation Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP To build and modify the HS… Changes in otherelements are needed? (Internalpropagarion) Changes in othersybsystems are needed? (Externalpropagarion) OK. I have finished Action 1 Action 2 . . . Action n System restrictions? Author restrictions? Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP • Stores, structures and maintains conceptual and informational domain • Catalogues information item on the underlying conceptual domain • The representation model is a conceptual structure • Semantic net • 2 types of nodes semantically tagged (concepts and information item) • Formal definition CS=(C, I, Rc, Rf, Ac, Af) Let’s talk about vertical division… Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP CS=(C, I, Rc, Rf, Ac, Af) Rc (Conceptual Relation) rcRc is the tag placed in the arc joining coC and cdC Ac (Conceptual Association) acAc is composed by 2 concepts and a rc that exists between them Rf (Functional Relation) rfRf tags a link between ijI and ckC. Denotes the role that ij performs regarding ck Af (Functional Association) afRf is composed by a concept, an item and a rfRf that exist between them Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP Each presentation of the conceptual and informational domain is a Conceptual Structure of Presentation Each presentation updates modifications performed in the Memorization Subsystem Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP Define rules Ro to navigate based on: • Last item accessed • Concept associated to this item • Concepts available from this one When a concept or item is deleted the meta-system propagates the change Deletes rules or predicates in rules Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP Models the user and adapts the system to his characteristics. Information at User model: • Personal data • Knowledge state • Experience on subject • Navigation experience • Preferences • Interests • Goals Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP MEMORIZATION Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP PRESENTATION Laboratorio de Investigación en Videojuegos y E-Learning
SEM-HP LEARNING Laboratorio de Investigación en Videojuegos y E-Learning
Results • 31 students • Knowledge domain: Object Oriented Programmation • JSEM-HP to build the HS • Positive evaluation in 35 aspects • Test by an opinion questionnaire Laboratorio de Investigación en Videojuegos y E-Learning
Results Some results Laboratorio de Investigación en Videojuegos y E-Learning
Conclusions and further work • SEM-HP is a semantic, systemic and evolutionary model to develop hypermedia systems • Provides the author a systematic development process, a layered architecture and an author tool Laboratorio de Investigación en Videojuegos y E-Learning
Conclusions and further work • The architecture is divide in 4 subsystems and has 2 abstraction levels to perform automatic evolution • The navigation structure allows student to check their knowledge degree • Finishing JSEM-HP to carry our wider assessments from students and author perspective Laboratorio de Investigación en Videojuegos y E-Learning
Laboratorio de Investigación en Videojuegos y E-Learning GEDES - UGR A Model Based on Semantic Nets to Support Evolutionary and Adaptive Hypermedia Systems THANK YOU! N. Padilla Zea M. Medina Medina M. J. Cabrera F. Molina Ortiz L. García Cabrera