Abstract. The provision of interactive multimedia services, such as video-on-demand, teleshoping ... more Abstract. The provision of interactive multimedia services, such as video-on-demand, teleshoping and distance learning, to a large num-ber of users, still remains a challenging issue in the multimedia area. Despite of recent technological advances in all levels of the distributed multimedia ...
This paper presents the SICMA Multimedia Information Server that was demonstrated during the firs... more This paper presents the SICMA Multimedia Information Server that was demonstrated during the first public trial of the ACTS SICMA project, which took place in Natural History Museum of London and in Gallo Romeins Museum of Tongeren (Belgium), from June to September of 1997. The demonstrator application, namely the "Virtual Museum", is also presented. The SICMA server complies to the
Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014), 2014
ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and on... more ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and online availability of a huge amount of data. This data is of varied reliability and accuracy and exists in various forms and formats. Often, it is cross-referenced and linked to other data, forming a nexus of text, images, animation and audio enabled by hypertext and, recently, by the Web3.0 standard. Our main goal is to enable historians, architects, archaeolo- gists, urban planners and affiliated professionals to reconstruct views of historical monuments from thousands of images floating around the web. This paper aims to provide an update of our progress in designing and imple- menting a pipeline for searching, filtering and retrieving photographs from Open Access Image Repositories and social media sites and using these images to build accurate 3D models of archaeological monuments as well as enriching multimedia of cultural / archaeological interest with metadata and harvesting the end products to EU- ROPEANA. We provide details of how our implemented software searches and retrieves images of archaeological sites from Flickr and Picasa repositories as well as strategies on how to filter the results, on two levels; a) based on their built-in metadata including geo-location information and b) based on image processing and clustering techniques. We also describe our implementation of a Structure from Motion pipeline designed for producing 3D models using the large collection of 2D input images (>1000) retrieved from Internet Repositories.
ABSTRACT Learning objectives have been researched in cognitive psychology and in education, in or... more ABSTRACT Learning objectives have been researched in cognitive psychology and in education, in order to specify the goals of a learning process. Bloom’s taxonomy provides a description of learning objectives in 6 stages of scaling complexity. Bayesian networks and decision theory have been used extensively in Intelligent Tutoring Systems in order to model uncertainty on the one hand and learner or tutor preferences on the other, while diagnosing the learners’ cognitive state. In this paper we evaluate a model for task-based diagnosis of cognitive achievement, based on learning objectives, static Bayesian networks, decision theory and multi-attribute utility theory. The cognitive achievement of learning objectives is tested against observed learner behaviour in a non-deterministic manner, due to the inherent uncertainty in the problem. The proposed model is domain-independent since it assumes that learning material consists of generic Learning Objects associated with specific learning objectives. Multi-attribute utility theory is used for combining learning evidence with tutor preferences, thus providing for different tutors and different types of tutoring. Bayesian networks are used for handling the uncertainty of the diagnosis by calculating the posterior probability of achieving a learning objective based on the available evidence. Decision theory is used for expressing the pedagogical utility of available actions. The evaluation parameters include preferences regarding the value of evidenced learner behaviour such as assessment results, affective states, the learner’s own belief and the time-on-task, as well as the pedagogical utility of available actions. All learning evidence is modelled as discrete-state variables. Assessment results are modelled as binary or multiple-state variables. Affective states range from negative to positive, while the time-on-task is discretized in a scale from ‘too little time’ to ‘a lot of time’. The learner’s own belief about her cognitive state is included in the model, as an important feature of an open learning process. The learner’s belief is expressed through his post-task activity with respect to the learning goal at hand. The model is used for the selection of suitable remediation Learning Objects (LO’s) or for moving on to the next learning goal, in an intelligent learning environment. Data from real tutoring sessions in introductory programming courses and real assessment results are used in order to test the validity of the model.
International Journal of Decision Support System Technology, 2012
Innovation is a critical factor in building an organization’s culture of growth. Provided that ... more Innovation is a critical factor in building an organization’s culture of growth. Provided that it is properly blended with organizational development initiatives and aligned with the organization’s strategy, it supplies a compelling advantage for the growth process. Neglecting to encompass innovation in an organization’s culture could lead to shrinkage and even extinction, in the case of an intensively competitive market.
Interdisciplinary Perspectives on User Satisfaction, 2014
ABSTRACT E-learning has known a large expansion in the past decades due to the advent of the Inte... more ABSTRACT E-learning has known a large expansion in the past decades due to the advent of the Internet as a major communication medium and the WWW as a technology that provides enormous capabilities for information exchange anytime, anywhere, anyhow. Few studies exist on the evaluation of e-learning Websites in terms of their pedagogical quality that is on their success in helping learners learn through specific pedagogical principles. Pedagogical evaluation, however, is very important in e-learning as it can improve the quality of the system greatly and help the decision maker choose the most appropriate among different systems or designs. This chapter proposes a multi-criteria evaluation model for e-learning Websites based on well-known pedagogical principles, namely Bloom’s taxonomy of six cognitive objectives, Knowledge, Comprehension, Application, Analysis, Synthesis, and Evaluation.
Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014), 2014
ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and on... more ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and online availability of a huge amount of data. This data is of varied reliability and accuracy and exists in various forms and formats. Often, it is cross-referenced and linked to other data, forming a nexus of text, images, animation and audio enabled by hypertext and, recently, by the Web3.0 standard. Our main goal is to enable historians, architects, archaeolo- gists, urban planners and affiliated professionals to reconstruct views of historical monuments from thousands of images floating around the web. This paper aims to provide an update of our progress in designing and imple- menting a pipeline for searching, filtering and retrieving photographs from Open Access Image Repositories and social media sites and using these images to build accurate 3D models of archaeological monuments as well as enriching multimedia of cultural / archaeological interest with metadata and harvesting the end products to EU- ROPEANA. We provide details of how our implemented software searches and retrieves images of archaeological sites from Flickr and Picasa repositories as well as strategies on how to filter the results, on two levels; a) based on their built-in metadata including geo-location information and b) based on image processing and clustering techniques. We also describe our implementation of a Structure from Motion pipeline designed for producing 3D models using the large collection of 2D input images (>1000) retrieved from Internet Repositories.
Innovation is a critical factor in building an organization’s culture of growth. Provided that ... more Innovation is a critical factor in building an organization’s culture of growth. Provided that it is properly blended with organizational development initiatives and aligned with the organization’s strategy, it supplies a compelling advantage for the growth process. Neglecting to encompass innovation in an organization’s culture could lead to shrinkage and even extinction, in the case of an intensively competitive market.
Abstract. The provision of interactive multimedia services, such as video-on-demand, teleshoping ... more Abstract. The provision of interactive multimedia services, such as video-on-demand, teleshoping and distance learning, to a large num-ber of users, still remains a challenging issue in the multimedia area. Despite of recent technological advances in all levels of the distributed multimedia ...
This paper presents the SICMA Multimedia Information Server that was demonstrated during the firs... more This paper presents the SICMA Multimedia Information Server that was demonstrated during the first public trial of the ACTS SICMA project, which took place in Natural History Museum of London and in Gallo Romeins Museum of Tongeren (Belgium), from June to September of 1997. The demonstrator application, namely the "Virtual Museum", is also presented. The SICMA server complies to the
Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014), 2014
ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and on... more ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and online availability of a huge amount of data. This data is of varied reliability and accuracy and exists in various forms and formats. Often, it is cross-referenced and linked to other data, forming a nexus of text, images, animation and audio enabled by hypertext and, recently, by the Web3.0 standard. Our main goal is to enable historians, architects, archaeolo- gists, urban planners and affiliated professionals to reconstruct views of historical monuments from thousands of images floating around the web. This paper aims to provide an update of our progress in designing and imple- menting a pipeline for searching, filtering and retrieving photographs from Open Access Image Repositories and social media sites and using these images to build accurate 3D models of archaeological monuments as well as enriching multimedia of cultural / archaeological interest with metadata and harvesting the end products to EU- ROPEANA. We provide details of how our implemented software searches and retrieves images of archaeological sites from Flickr and Picasa repositories as well as strategies on how to filter the results, on two levels; a) based on their built-in metadata including geo-location information and b) based on image processing and clustering techniques. We also describe our implementation of a Structure from Motion pipeline designed for producing 3D models using the large collection of 2D input images (>1000) retrieved from Internet Repositories.
ABSTRACT Learning objectives have been researched in cognitive psychology and in education, in or... more ABSTRACT Learning objectives have been researched in cognitive psychology and in education, in order to specify the goals of a learning process. Bloom’s taxonomy provides a description of learning objectives in 6 stages of scaling complexity. Bayesian networks and decision theory have been used extensively in Intelligent Tutoring Systems in order to model uncertainty on the one hand and learner or tutor preferences on the other, while diagnosing the learners’ cognitive state. In this paper we evaluate a model for task-based diagnosis of cognitive achievement, based on learning objectives, static Bayesian networks, decision theory and multi-attribute utility theory. The cognitive achievement of learning objectives is tested against observed learner behaviour in a non-deterministic manner, due to the inherent uncertainty in the problem. The proposed model is domain-independent since it assumes that learning material consists of generic Learning Objects associated with specific learning objectives. Multi-attribute utility theory is used for combining learning evidence with tutor preferences, thus providing for different tutors and different types of tutoring. Bayesian networks are used for handling the uncertainty of the diagnosis by calculating the posterior probability of achieving a learning objective based on the available evidence. Decision theory is used for expressing the pedagogical utility of available actions. The evaluation parameters include preferences regarding the value of evidenced learner behaviour such as assessment results, affective states, the learner’s own belief and the time-on-task, as well as the pedagogical utility of available actions. All learning evidence is modelled as discrete-state variables. Assessment results are modelled as binary or multiple-state variables. Affective states range from negative to positive, while the time-on-task is discretized in a scale from ‘too little time’ to ‘a lot of time’. The learner’s own belief about her cognitive state is included in the model, as an important feature of an open learning process. The learner’s belief is expressed through his post-task activity with respect to the learning goal at hand. The model is used for the selection of suitable remediation Learning Objects (LO’s) or for moving on to the next learning goal, in an intelligent learning environment. Data from real tutoring sessions in introductory programming courses and real assessment results are used in order to test the validity of the model.
International Journal of Decision Support System Technology, 2012
Innovation is a critical factor in building an organization’s culture of growth. Provided that ... more Innovation is a critical factor in building an organization’s culture of growth. Provided that it is properly blended with organizational development initiatives and aligned with the organization’s strategy, it supplies a compelling advantage for the growth process. Neglecting to encompass innovation in an organization’s culture could lead to shrinkage and even extinction, in the case of an intensively competitive market.
Interdisciplinary Perspectives on User Satisfaction, 2014
ABSTRACT E-learning has known a large expansion in the past decades due to the advent of the Inte... more ABSTRACT E-learning has known a large expansion in the past decades due to the advent of the Internet as a major communication medium and the WWW as a technology that provides enormous capabilities for information exchange anytime, anywhere, anyhow. Few studies exist on the evaluation of e-learning Websites in terms of their pedagogical quality that is on their success in helping learners learn through specific pedagogical principles. Pedagogical evaluation, however, is very important in e-learning as it can improve the quality of the system greatly and help the decision maker choose the most appropriate among different systems or designs. This chapter proposes a multi-criteria evaluation model for e-learning Websites based on well-known pedagogical principles, namely Bloom’s taxonomy of six cognitive objectives, Knowledge, Comprehension, Application, Analysis, Synthesis, and Evaluation.
Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014), 2014
ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and on... more ABSTRACT One of the main characteristics of the Internet era we are living in, is the free and online availability of a huge amount of data. This data is of varied reliability and accuracy and exists in various forms and formats. Often, it is cross-referenced and linked to other data, forming a nexus of text, images, animation and audio enabled by hypertext and, recently, by the Web3.0 standard. Our main goal is to enable historians, architects, archaeolo- gists, urban planners and affiliated professionals to reconstruct views of historical monuments from thousands of images floating around the web. This paper aims to provide an update of our progress in designing and imple- menting a pipeline for searching, filtering and retrieving photographs from Open Access Image Repositories and social media sites and using these images to build accurate 3D models of archaeological monuments as well as enriching multimedia of cultural / archaeological interest with metadata and harvesting the end products to EU- ROPEANA. We provide details of how our implemented software searches and retrieves images of archaeological sites from Flickr and Picasa repositories as well as strategies on how to filter the results, on two levels; a) based on their built-in metadata including geo-location information and b) based on image processing and clustering techniques. We also describe our implementation of a Structure from Motion pipeline designed for producing 3D models using the large collection of 2D input images (>1000) retrieved from Internet Repositories.
Innovation is a critical factor in building an organization’s culture of growth. Provided that ... more Innovation is a critical factor in building an organization’s culture of growth. Provided that it is properly blended with organizational development initiatives and aligned with the organization’s strategy, it supplies a compelling advantage for the growth process. Neglecting to encompass innovation in an organization’s culture could lead to shrinkage and even extinction, in the case of an intensively competitive market.
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Papers by Georgia Kyriakaki