All posts by Prof. Yeong-Tae Song


About Prof. Yeong-Tae Song

Towson University - Towson, MD - USA

Ontology based learner-centered smart e-learning system

Rapid changes in learning contents and variability of the learners’ background can make e-learning systems inefficient due to their inflexibility in coping with such factors – changes and variability. In this paper, we are proposing an ontological approach in dealing with such issues. Our approach – the Ontology based Learner-centered Smart E-Learning System (OLSES) – allows instructors and learners semantically organize their learning objects to the learning contents repository and through the semantic searches, create filtered and ordered collection of learning objects as study plans – instructor-created study plans (ISP) and learner-created study plans (LSP) respectively. The OLSES continuously monitors the activities of the learners and updates their profiles accordingly so it can be used to search more suitable learning object for their learners.
In OLSES, the key to find relevant learning objects for the given topic is ontology-based semantic search. For that, all learning objects need to be registered in OLSES where an ontology-based meta-data definition is in place. In case of LSPs, learners can organize their own learning objects. This scheme builds the learner-centered learning environment by providing the learners with the relevant learning objects that suitably match with learners’ need so it help improve the learning performance at the same time.

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Bridging the gap between academia and industry through user-centred training

Bridging the Gap is a project-based online track within TU-Towson University’s undergraduate curriculum that will provide industry and theoretical background through a module-based e-learning environment. Bridging the Gap will develop and enhance TU’s existing IT courses with the addition of self-paced e-learning modules and hands-on industry projects. The project will assist faculty members with developing and administering class assignments by utilizing modulated project repository and providing them with continuous real-time technology updates, required skill sets and knowledge of industry trends. The business community will also benefit from the User Centred Software Engineering and Web Technology Lab; the lab will serve as a test bed for industry applications. Active collaboration with industry will result in the development of new research initiatives for undergraduate and graduate students while, at the same time, helping them develop real-world skill sets to compliment what they will learn through self-paced e-learning modules. Bridging the Gap’s approach will lead to the development of a project-based course curriculum, which will benefit the students, TU and other universities, and ultimately the IT industry.

Received: 4th June 2008

Revised: 23rd September 2008

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Virtual collaboration and training in medicine through multimedia e-learning system

Web-based virtual collaboration is increasingly gaining popularity in almost every area in our society due to the fact that it can bridge the gap imposed by time and geographical constraints. However, in medical field, such collaboration has been less popular than other fields. Some of the reasons were timeliness, security, and preciseness of the information they are dealing with. In this paper, we are proposing a web-based distributed medical collaboration system called Virtual Collaboration System for Medicine (VCSM) for medical doctors that meet the needs. The proposed system consists of two parts: multimedia presentation and recordable virtual collaboration. The former supports synchronized multimedia presentation using Synchronous Multimedia Integration Language (SMIL). It allows synchronization of the contents of a PowerPoint presentation file and a video file so that the presentation shows slides and video on the same topic at any given time. The resulting SMIL file is used to provide multimedia presentation for image intensive discussion. The presentation may be provided to the participants before the discussion begins. Participants can use text along with associated symbols during the discussion over the presented medical images. The symbols such as arrows or polygons have x-y coordinates within the images to represent associated participants’ opinions. Those can be set or removed dynamically to represent areas of interest in digital images using so called layered architecture that separates image layer from annotation layer. Those annotations can be easily hidden for training purposes. XML files are used to record participants’ opinions along with the associated elements such as arrows and polygons over some particular images.

Received: April 9th, 2007
Revised: May 5th, 2007

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