Catálogo de publicaciones - libros

Large quantities of historical newspapers are being digitized and OCRd. We describe a framework for processing the OCRd text to identify articles and extract metadata for them. We describe the article schema and provide examples of features that facilitate automatic indexing of them. For this processing, we employ lexical semantics, structural models, and community content. Furthermore, we describe visualization and summarization techniques that can be used to present the extracted events.

This paper presents a “persistent chat” extension to the ePresence Interactive Media webcasting infrastructure to support real-time commenting on and discussing of issues that arise during a learning event, followed by ongoing asynchronous dialogue about these issues while viewing the archives after the event. We report encouraging results of a field study of use of the system by students and a teaching assistant in a computer science class on communication skills, which encouraged students to review, think critically about, and improve their public speaking abilities.

As of 2003, 99% of K-12 schools in the United States use the Internet.  With the increased use of databases and other technologies to manage data in K-12 institutions, an inherent threat to the privacy and confidentiality of that information has also increased.   Over the last decade, with the increased use of these technologies, there has also been an increase in the number of privacy-related violations that have occurred, both in industry and in the K-12 environment.  There are a plethora of security technologies that can be used to improve privacy; however, organizations such as K-12 schools often cannot afford to hire IT staff versed in the state of the art.   Furthermore, technology alone will not address security and privacy problems; policy is an essential ingredient for any organization.  This study is a gap analysis investigating privacy practices of public educators in the Midwestern portion of the United States.  The significance of the work is that we cannot improve the practices unless we understand deficiencies in current privacy practices and perceptions.

The objective of this paper is to present a part of m-learning process developed at our University at the Faculty of Electrical Engineering in the field of image processing. The basic courses in this field are on the Faculty Web. The multimedia illustration of the basic methods in image processing is realized both on Desktop PC and on handheld (PDA) devices equipped with cameras and could be used individually by each student. The students can take photos with the cameras and interactively learn about the results of the image processing algorithms. For efficient use of the handheld devices we developed a suitable HCI. According to the surveys with 20 students at the last year of study, their experience with our specially developed tools for m-learning is very positive.

In this paper we present a semi-automatic ontology editor as implemented in a new version of OntoGen system. The system integrates machine learning and text mining algorithms into an efficient user interface lowering the entry barrier for users who are not professional ontology engineers. The main features of the systems include unsupervised and supervised methods for concept suggestion and concept naming, as well as ontology and concept visualization. The system was tested in extensive user trails and in several real-world scenarios with very positive results.

Knowledge sharing is presumed to be better facilitated through knowledge gardening metaphor. Nonetheless, there is a research gap in the metaphor application, where there is yet a formal elicitation undertaken towards it. This paper intends to answer three questions: How does knowledge gardening metaphor supports knowledge sharing within a user interface? What properties should the overall user interface have to support user-oriented environment? How can the knowledge gardening metaphor be elicited? Henceforth, a description on the user interface design incorporating knowledge gardening metaphor is discussed. Steps undertaken in a metaphor elicitation are also provided.

When information is memorized, the brain rehearses it. We can preserve information over a long period of time if this rehearsal is effectively performed in studying. This research aims 1.To clarify the effect of the rehearsal in e-learning, 2. To clarify the effective method for summary-making using a prototype system that studies structure of a stock (equity in a company). For this purpose, we 1.Compare the difference among three rehearsal methods, 2. (From result of 1) compare the results of an experiment of “Summarize” rehearsal method. As a result we find that the “Summarize” rehearsal is effective, especially when used for memorization constraints imposed in the number and types words used.

Science and technology communication is very important for a lot of people, engineers, scientist, and students. In order to study science and technology communication method, some education programs have started in some universities of Japan. In this study, to support education programs for science and technology communication, a support tool using computer is designed and developed. The target of support is group discussion of the exercise, and the developed software tool was used in the exercises in Osaka University.

The cultural background of learners has been highlighted as crucial in determining the effectiveness of educational technology. This paper focuses on the influence of power distance in determining the effectiveness of educational technology. Utilizing a multiple case study, we examined the perception of learners from small and large power distance societies in terms of satisfaction with learning, self-efficacy with educational technology and perceived learning. Our findings show that the availability of educational technology enhances the learning outcomes of both cultures. The study suggests the notion that learning outcomes differ for learners from small and large power distance cultures.

We develop a multiple-view tool called AlViz, which aims at supporting the ontology alignment process visually. Combing views on several levels of abstraction, the tool tries to make the ’relatedness’ between entities accessible. Based on a literature study we identified relevant phases emerging in ontology alignment. We extended a general alignment framework in order to reflect the adoption of visualization techniques. This framework builds the background for our user study. We evaluate visual ontology alignment with AlViz in three stages: (1) Participative software development, (2) usability evaluation, and (3) utility study. The evaluation methods proved viable even though our study design is challenging.