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PUBLICATIONS

2019

Motion Capture and whole-body interaction technologies have been experimentally proven to contribute to the enhancement of dance learning and to the investigation of bodily knowledge, innovating at…

2017

In this paper, we propose an approach to describe the temporal aspects of ontological representation of dance movement. By nature, human movement consists of complex combinations of spatiotemporal…

2016

In this paper we present BalOnSe (named after the ballet step balance), an ontology-based web interface that allows the user to annotate classical ballet videos, with a hierarchical domain specific…
Clouds have become an attractive platform for highly scal- able processing of Big Data, especially due to the concept of elasticity, which characterizes them. Several languages and systems for cloud-…

2015

Supporting real-time, cost-effective execution of Complex Event processing applications in the cloud has been an important goal for many scientists in recent years. Distributed Stream Processing…
This paper reports on a small-scale experiment conducted in the Stedelijk Museum Amsterdam (SMA), showcasing the effective use of CHESS research prototype for the creation and provision of…
Mobile devices, such as smartphones allow us to use computationally expensive algorithms and techniques. In this paper, we study algorithms in order to solve the problem of finding the most similar…
Users in social networks utilize hashtags for a variety of reasons. In many cases, hashtags serve retrieval purposes by labeling the content they accompany. More often than not, hashtags are used to…
The existing practices of the urban section of freight transport chain result in traffic congestion, air pollution and resources being wasted. We focus on the final stage of freight distribution and…
Earth-Science data are composite, multidimensional and of significant size, and as such, continue to pose a number of on-going problems regarding their management. With new and diverse information…
Authors of scientific publications and books use images to present a wide spectrum of information. Despite the richness of the visual content of scientific publications the figures are usually not…
Twitter is one of the most prominent social media platforms nowadays. A primary reason that has brought the medium at the spotlight of academic attention is its real-time nature, with people…
We present a subsequence matching framework that allows for gaps in both query and target sequences, employs variable matching tolerance efficiently tuned for each query and target sequence, and…
Complex Event Processing (CEP) systems process large streams of data trying to detect events of interest. Traditional CEP systems, such as Esper, lack the required scalability and processing…
Big Data Analytics is an emerging field since massive storage and computing capabilities have been made available by advanced e-infrastructures. Earth and Environmental sciences are likely to benefit…
Many modern applications require the evaluation of analytical queries on large amounts of data. Such queries entail joins and heavy aggregations that often include user-defined functions (UDFs). The…
Digital storytelling is one resource museums have in hand for enriching their offer to audiences and society at large. But how is the museum to author digital storytelling experiences that cater to…

2014

In this paper, we deal with the integration of multiple sources of information such as Earth observation (EO) synthetic aperture radar (SAR) images and their metadata, semantic descriptors of the…
Processing complex dataflow tasks (graphs) on the cloud is a critical requirement for many applications. Schedul- ing dataflow graphs on cloud resources has many tradeoffs between monetary cost and…
In the era of Big Data, datasets are growing at a much higher rate than the processing power of a single machine. In the long run, distributed computing seems to be the only viable solution to be…
In this paper, we discuss the key elements of a semantic dance-move representation model based on rule-based extractions of logical descriptions from existing Labanotation scores. This is part of a…
We propose a comprehensive information processing, knowledge discovery and simulation platform for Big Data Healthcare. In addition, we present a related, well-defined workflow that promotes model-…
Facebook’s architecture relies on various services that answer queries about people and their friends. Because of the size of the dataset, number of queries per second, and latency requirements, many…
An increasing number of Web applications such as friends recommendation depend on the ability to join objects at scale. The traditional approach taken is nearest neighbor join (also called similarity…
Lots of Earth Observation data has become available at no charge in Europe and the US recently and there is a strong push for more open EO data. Open EO data that are currently made available by…
In the last few years, thanks to projects like TELEIOS, the linked open data cloud has been rapidly populated with geospatial data some of it describing Earth Observation products (e.g., CORINE Land…
Lots of Earth Observation data has become available at no charge in Europe and the US recently and there is a strong push for more open EO data. Open EO data that are currently made available by…
Advances in remote sensing technologies have allowed us to send an ever-increasing number of satellites in orbit around Earth. As a result, Earth Observation data archives have been constantly…
In this work, we describe the basic elements of an effort towards achieving personalized storytelling for museum visits in the context of the CHESS project, with a focus on the profiling techniques…
We improve the state-of-the-art method for graph compression by exploiting the locality of reference observed in social network graphs. We take advantage of certain dense parts of those graphs,…
In this work, we present the CHESS research prototype system which offers personalized, interactive digital storytelling experiences to enhance museum visits, demonstrating the authoring and…
Text visualization is a rather important task related to scientific corpora, since it provides a way of representing these corpora in terms of content, leading to reinforcement of human cognition…
The description of the human body and its movement is fundamental and a critical part of the content of a Dance Digital Library. It must be captured in an organized way, both for allowing user…
We study the problem of distributed resource sharing in peer-to-peer networks and focus on the problem of information ltering. In our setting, subscriptions and publications are speci ed using an…
We improve the state-of-the-art method for the compression of web and other similar graphs by introducing an elegant technique which further exploits the clustering properties observed in these…
CHESS is a research prototype system aimed at enriching museum visits through personalized interactive storytelling. Aspiring to replace traditional exhibit-centric descriptions by story-centric…
Researchers, nowadays, have at their disposal valuable data from social networking applications, of which Twitter and Facebook are the most prominent examples. To retrieve this content, the Twitter…
The acquaintance of Museums and Cultural Heritage (CH) institutions with the digital age challenges is of no question a matter of survival. Nevertheless, the dialogue between CH and Information and…
The Information Inference Framework presented in this paper provides a general-purpose suite of tools enabling the definition and execution of flexible and reliable data processing workflows whose…
The ever growing amount of information collected by scientific instruments and the presence of descriptive metadata accompanying them calls for a unified way of querying over array and semi-…

2013

This paper discusses issues related to digital storytelling and its use in Cultural Heritage institutions. It will demonstrate the usefulness and advantages of digital storytelling by providing…
Geospatial extensions of SPARQL like GeoSPARQL and stSPARQL have recently been de ned and corresponding geospatial RDF stores have been implemented. However, there is no widely used benchmark for…
We present SexTant, a Web-based system for the visualization and exploration of time-evolving linked geospatial data and the creation, sharing, and collaborative editing of \temporally-enriched"…
The present work describes a Web interface aiming at the advanced fruition of music content. This browser application, already available on the Internet, adopts the international standard known as…
In this paper, we discuss the challenges that we have faced and the solutions we have identified so far in our currently on-going effort to design and develop a Dance Information System for archiving…
Strabon is a very scalable and ecient RDF store for storing and querying geospatial data that changes over time. We present the geospatial and temporal features of Strabon and we demonstrate their…