ACM Journal on

Computing and Cultural Heritage (JOCCH)

Latest Articles

Conducting Visitor Studies Using Smartphone-Based Location Sensing

Visitor studies explore human experiences within museums, cultural heritage sites, and other informal learning settings to inform decisions.... (more)

Automatic Extraction of Petrographic Features from Pottery of Archaeological Interest

The microscopic description of ancient pottery is widely used for the fabric definition, classification and provenance assessment. In most cases,... (more)

Information Reliability Evaluation

The literature on information retrieval shows the importance of information reliability as a key criterion for relevance judgment. However, information reliability evaluation is discussed in many disciplines such as history, Arabic storytelling, and computer science. Although these disciplines share common principles, they differ in many aspects,... (more)

Integrating a Location-Based Mobile Game in the Museum Visit

Location-based systems currently represent a suitable solution to enhance cultural experiences inside museums, as they can satisfy visitors’... (more)

Ancient Polychromy

Digital reconstruction of ancient polychromy is a relatively recent phenomenon in the history of archaeological and architectural heritage documentation. It has emerged as a result of new interest in the experimental archaeology and the technological development of computer graphic tools. Therefore, this article presents a project aimed at the... (more)

Automatic Production of Tailored Packaging for Fragile Archaeological Artifacts

This article deals with storage and transportation of fragile heritage objets. The main goal is to... (more)


New options for ACM authors to manage rights and permissions for their work

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ACM is endorsing ORCID, a community-based effort to create a global registry of unique researcher identifiers for the purpose of ensuring proper attribution of works to their creators. JOCCH authors are invited to create an ORCID unique researcher identifier (see at ) and to add this id at submission time.

Impact Factor Update

The journal Impact Factor (IF) is produced by ISI. A pre-condition to the application process is a record of timely publication of journal issues over a two-year period. I am pleased to announce that JOCCH followed a regular publishing schedule from 2012 through 2013 and so the procedure for requesting the ISI IF certification started early 2014. The evaluation period will take approximately two years.
In the meantime, please note that ACM JOCCH is cited and measured in SCImago and in the Elsevier's Journal Metrics system, based on Scopus data.

Forthcoming Articles

Adaptive Sparse Representation for Analyzing Artistic Style of Paintings

Inspired by the outstanding performance of sparse coding in a variety of image/video relevant classification and identification tasks, we propose an adaptive sparse coding method for painting authentication that is traditionally carried out by art connoisseurs and experts. Significantly improved over previous sparse coding methods, which heavily rely on the comparison of query paintings, our method is able to determine the authenticity of a single query painting based on the estimated decision boundary. Specifically, discriminative patches containing the most representative characteristics of the given samples are firstly extracted via exploiting the statistical information of their representation on the DCT basis. Subsequently, the strategy of adaptive sparsity constraint which assigns higher sparsity weight to the patch with higher discriminative level is enforced to make the dictionary trained on such patches more adaptive to the training samples than via previous sparse coding algorithms. Relying on the learnt dictionary, the query painting can be authenticated if both better denoising performance and higher sparse representation are obtained, otherwise it should be denied. Extensive experiments on our dataset comprised of paintings from van Gogh and Monet demonstrate the effectiveness of our method.

Automatic Production of Tailored Packaging for Fragile Archaeological Artifacts

This paper deals with storage and transportation of fragile heritage objets. The main goal is to create an ad-hoc packaging software solution by combining the use of 3D scanning and 3D milling technologies. Traditionally, packaging for this kind of objects is made manually, creating custom supports and boxes adapted to the specific needs and particularities of each case. This process is time-consuming, error-prone, costly and does not ensure a standard quality. On the other hand, the proposed solution (specially adapted to archaeological glass needs) provides faster results, while increasing achieved quality and reducing costs. The process starts with the acquisition of 3D digital models of the original artifacts and uses an interactive GPU-accelerated algorithm to assist restoration personnel in the automatic design of the tailored package. The final result is a CNC program that is sent to a low cost milling machine to produce the housing for the selected artifact. Unlike 3D printers, milling machines allow working with lots of different materials, which is a key aspect for this kind of packages: chemical stability and shock absorption are mandatory. Given that, during the design process, original artifacts are only manipulated in the acquisition stage, risks of damaging them are also reduced. Since the whole process is considered in the same application, intermediate calculations are performed considering manufacturing and user-defined restrictions. This way, together with a GPU implementation, achieved results are very fast providing a real-time application with visual feed-back.

Alternative Representations of 3D-Reconstructed Heritage Data

By collecting images of heritage assets from members of the public and processing them to create 3D reconstructed models, the HeritageTogether project has accomplished the digital recording of nearly 80 sites across Wales, UK. A large amount of data has been collected and produced in the form of photographs, 3D models, maps, condition reports and more. Here we discuss some of the different methods used to realise the potential of this data in different formats and for different purposes. The data are explored in both virtual and tangible settings, and - with the use of a touch table - a combination of both. We examine some alternative representations of this community-produced heritage data for educational, research and public engagement applications.

Developing 3D imaging programmes - workflow and quality control

This short paper reports on an ongoing project for 3D imaging research, digital applications and use of new technologies in the museum. The paper will focus on the development and implementation of a viable workflow for the production of high quality 3D models of museum objects, based on the 3D laser scanning and photogrammetry of selected ancient Egyptian artefacts. The development of a robust protocol for the complete process chain for imaging cultural heritage artefacts, from the acquisition of 2D and/or 3D images to the development of interactive applications for the public audience, was a specific objective of the project. The workflow devised by the university museum team combines reference photography and 3D imaging with a curatorial review of the actual object to its digital counterpart. It also integrates methodologies for managing the accompanying metadata sets to record these activities. As final stage deliverables from the process, the museum is making high quality 3D images of artefacts from its collection available through creation and dissemination of digital 3D multi-platform interactive applications in order to allow remote access and to enhance the Museum's public engagement. The short paper will conclude with practical considerations for a 3D imaging workflow such as time and skills needed, 3D model quality and expectation management.

Fast Image Classification for Monument Recognition

The ROV 3D Project: Deep-sea underwater survey using photogrammetry. Applications for underwater archaeology

In this paper we present an approach for deep-sea survey based on photogrammetry using a remotely operated underwater vehicle (ROV). A hybrid technique gives us real-time results, sufficient for piloting the ROV from the surface vessel and ensuring a uniform coverage of the site as well as recording high-definition images using an on-board computer that will later provide a survey with millimetric precision. The measurements are made without any contact and are non invasive. The time required on site is minimal, and corresponds to the time needed by the ROV to cover the zone. With the photos taken at a frame rate synchronized at 10 Hz, the ROV required two hours to perform the experiment presented in this article: The survey of the Roman shipwreck Cap Bénat 4, at a depth of 328 metres. The approach presented in this paper was developed in the scope of the ROV 3D project. This project, financed by the Fond Unique Interministériel (FUI) for three years, brings together two industrial partners and a research laboratory. The COMEX (COmpanie Maritime dExpertise) coordinated this project.

3D artifacts similarity based on the concurrent evaluation of heterogeneous properties

Archaeological artifacts are often classified in homogeneous groups, according to either intangible properties (e.g, origin, use, age) or physical features (e.g., colour, material, geometric shape, size, style). In particular, a single property is usually not enough to characterize artifacts peculiar traits, as most of the objects are affected by degradation or only partially preserved. In this paper we propose a shape analysis and comparison pipeline specifically targeted to the similarity assessment of real-world 3D artifacts. The proposed methodology is able to concurrently evaluate heterogeneous properties, such as geometric (e.g., curvature, size, roundness or mass distribution) and photometric aspects (e.g., texture, colour distribution or reflectance). The geometric description is based on a statistical technique to select properties that are mutually independent; the photometric information is handled according to a topological perspective, and complemented by the analysis of colour distribution. The outcome is a mixed description of each 3D artifact, which is used to derive a similarity measure between objects. The potential of our approach is high since any property representable as real- or vector-valued functions can be easily added in our framework. Experimental results carried on an existing collection of textured triangle meshes are exhibited to show the potentiality of the method in retrieval and classification tasks.

Low-Cost Real-Time 3D Reconstruction of Large-Scale Excavation Sites using an RGB-D Camera

The 3D-reconstruction of archeological sites is still an expensive and time-consuming task. In this paper, we present a novel interactive low-cost approach for this purpose and compare it to a standard photogrammetry-pipeline based on high-resolution photographs. Our novel real-time reconstruction pipeline is based on a low-cost consumer-level hand-held RGB-D sensor. While scanning, the user sees a live view of the current reconstruction, allowing him to intervene immediately and to adapt the sensor path to the current scanning result. After a raw reconstruction has been acquired, the digital model is interactively warped to fit a geo-referenced map using a handle based deformation paradigm. Even large sites can be scanned within a few minutes, and no costly postprocessing is required. The quality of the acquired digitized raw 3D models is evaluated by comparing them to actual imagery, a geo-referenced map of the excavation site and a photogrammetry-based reconstruction. We made extensive tests under real world conditions on an archeological excavation in Metropolis, Ionia, Turkey. We found that the reconstruction quality of our approach is comparable to that of photogrammetry. Yet, both approaches have advantages and shortcomings in specific setups, which we analyze and discuss.

Folk Dance Evaluation Using LMA

Motion capture (mocap) technology is an efficient method for digitizing art-performances, and it is becoming increasingly popular in the preservation and dissemination of dance performances. Although technically the captured data can be of very high quality, dancing allows stylistic variations and improvisations that cannot be easily captured. The majority of the motion analysis algorithms are based on quantitative metrics and thus do not usually provide insights on style qualities of a performance. In this work, we present a framework based on the principles of Laban Movement Analysis (LMA) that aims to identify style qualities in dance motions. The proposed algorithm uses a high dimensional feature space that aims to capture the four LMA components (Body, Effort, Shape, Space), and can be subsequently used for motion comparison and evaluation. We have designed and implemented a prototype virtual reality simulator for teaching folk dance in which users can preview dance segments performed by a 3D avatar and repeat them. The user's movements are captured and compared to the folk dance template motions; then, an intuitive feedback is provided to the user based on the LMA components. The results demonstrate the effectiveness of our system, opening new horizons for automatic motion and dance evaluation processes.


Publication Years 2008-2015
Publication Count 128
Citation Count 188
Available for Download 128
Downloads (6 weeks) 1313
Downloads (12 Months) 11373
Downloads (cumulative) 49409
Average downloads per article 386
Average citations per article 1
First Name Last Name Award
David P Dobkin Fellows (1997)
Wen Gao Fellows (2013)
Ugur Gudukbay Senior Member (2008)
Tsvi Kuflik Distinguished Member (2013)
Senior Member (2012)
George Lepouras Senior Member (2008)
Holly E Rushmeier Distinguished Member (2006)
Kenneth Steiglitz Fellows (1997)

First Name Last Name Paper Counts
Roberto Scopigno 6
Marco Callieri 5
Ruggero Pintus 4
Enrico Gobbetti 4
Matteo Dellepiane 4
Livio Luca 3
Martin Doerr 3
Massimiliano Corsini 3
Carlos Sanchez-Belenguer 2
Eduardo Vendrell-Vidal 2
George Lepouras 2
Tim Weyrich 2
Francesco Bellotti 2
Alberto Villanueva 2
Dieter Fellner 2
Fabio Bettio 2
Stephen Laycock 2
Graham Bell 2
Markku Reunanen 2
Angeliki Antoniou 2
Nadine Couture 2
David Mortimore 2
Alan Chalmers 2
Valentina Fiore 2
Thomas Funkhouser 2
Alessandro De Gloria 2
Fabio Marton 2
Nick Corps 2
Riccardo Berta 2
Lily Diaz 2
Rudolf Gschwind 2
Paolo Cignoni 2
Anke Ludeling 2
Hijung Shin 2
Volker Settgast 2
Szymon Rusinkiewicz 2
Roberto Turco 1
Ying Yang 1
I Cacciari 1
Fabio Fumarola 1
Jane Tarakhovsky 1
Ido Dagan 1
Irene Rubino 1
Bilel Elayeb 1
Tarquinio Mota 1
R Castro 1
Leith Chan 1
Marcos Rodriguez 1
F Soler 1
Engtat Khoo 1
Jerzy Wojsz 1
Holly Rushmeier 1
John Ffrench 1
Amy Friedlander 1
David Dobkin 1
Max Arends 1
Bruce Merry 1
Hagen Hirschmann 1
Gregory Crane 1
Oliviero Stock 1
Katerina Boutsika 1
Michael Makridis 1
Ashraf Hussein 1
Daniel Aliaga 1
Mohamed Djibril 1
Diego Gutierrez 1
Robert Kalasek 1
Qixing Huang 1
Sven Havemann 1
Anupama Mallik 1
Bernard Frischer 1
Antoni Chica 1
Zheng Lu 1
Gabriele Fangi 1
Gualtiero Volpe 1
Farida Chériet 1
George Papagiannakis 1
Nadia Magnenat Thalmann 1
Florian Muller 1
Noor Mohd Yatim 1
Sofia Pescarin 1
Antonio Felle 1
Giovanni Cignoni 1
Wenching Liao 1
Mengchieh Yu 1
Sebastian Zambanini 1
Genfang Chen 1
Charlotte Hug 1
Gowri Somanath 1
Germana Barone 1
George Roussos 1
Ibrahim Bounhas 1
A Miranda 1
Jeffrey Shaw 1
Marco Agus 1
Juan Torres 1
Min Kim 1
Irma Passeri 1
Chihhong Huang 1
Roland Ruiters 1
Reinhard Klein 1
Shahar Kats 1
Julia Sheidin 1
Minjun Jiang 1
Mark Stevenson 1
Robert Laycock 1
Maciej Karaszewski 1
Stephanie Mahut 1
Mark Mudge 1
Jonathan Smith 1
Dolores Iorizzo 1
Hilke Thur 1
Lorenzo Gonzo 1
Antonio Camurri 1
Michael Ashley 1
Aimilia Tzanavari 1
Giorgio Trumpy 1
Maarten Heerlien 1
Joost Van Leusen 1
Kirsten Van Hulsen 1
David Buglio 1
S Siano 1
Gianvito Pio 1
Michelangelo Ceci 1
Tommi Horttana 1
Lior Shamir 1
Christian Hörr 1
Elisabeth Lindinger 1
Chunko Hsieh 1
Khurshid Ahmad 1
Giovanni Malnati 1
Theano Moussouri 1
Yahya Slimani 1
Nicolas Mellado 1
Christian Pere 1
Patrick Callet 1
Kirk Woolford 1
Erica Calogero 1
Ryohei Nakatsu 1
Adrian Cheok 1
Craig Sapp 1
Josef Froschauer 1
Dieter Merkl 1
Yiting Huang 1
Chawee Busayarat 1
Nadav Kashtan 1
Enzhi Ni 1
Mark Greco 1
Annamaria D'ursi 1
Paul Clough 1
Hisham El-Shishiny 1
Amalia De Götzen 1
Stefano Valtolina 1
Mihalis Exarhos 1
Qing Sun 1
Torsten Ullrich 1
Fermin Gomez 1
Jérôme Barthélemy 1
Roeland Ordelman 1
Simon Flöry 1
Oyvind Eide 1
Wei Luo 1
Moshe Ben-Ezra 1
Michael Brown 1
Vinay Das 1
Daryl Baldwin 1
Lukas Rosenthaler 1
Kenneth Steiglitz 1
Ruth Tringham 1
Charalambos Poullis 1
Naokazu Yokoya 1
Sven Helmer 1
Johannes Kohler 1
S May 1
Daniel Isemann 1
George Leifman 1
Rohith Mv 1
Elvira Aura-Castro 1
Andrea Adami 1
Nuno Correia 1
Sotiris Manitsaris 1
Frédéric Bevilacqua 1
Brett Ridel 1
M Gaiani 1
Sarah Kenderdine 1
Emmanuel Durand 1
Frédéric Mérienne 1
David Tidmarsh 1
Antonio Castañeda 1
Kris Naessens 1
Daniele Mori 1
James Gain 1
Amir Zeldes 1
David Mimno 1
Fabian Bohnert 1
Changle Zhou 1
Jane Hunter 1
Andrew Day 1
Loic Espinasse 1
Bin Ma 1
Panayiotis Roussopoulos 1
Ismail Altingövde 1
Atte Timonen 1
Fedelucio Narducci 1
Yogesh Garg 1
Thomas Hurtut 1
James Clarke 1
Cinzia Perlingieri 1
Nazrita Ibrahim 1
Irene Katsouri 1
Fumio Okura 1
Immanuel Normann 1
Gerd Reis 1
Didier Stricker 1
Cataldo Musto 1
Stephanie Schnorr 1
Suzanne De Jong-Kole 1
Donato Malerba 1
Fabio Gadducci 1
Christine Chevrier 1
Qiong Li 1
Ilan Shimshoni 1
Jennifer Gutierrez 1
Chandra Kambhamettu 1
Claudia Barberis 1
Jetmir Xhembulla 1
Eliana Siotto 1
Fabrice Evrard 1
Alejandro León 1
M Luzón 1
Stuart Dunn 1
Jaime Kaminski 1
Elwira Holowko 1
Jeffrey Trevino 1
Werner Purgathofer 1
Doron Goldfarb 1
Liz Sonenberg 1
Massimo Zancanaro 1
Irving Finkle 1
Judith Aston 1
D Drinkwater 1
P Cignoni 1
Alain Bonardi 1
Luis MagalhãEs 1
João Moura 1
Fabio Remondino 1
Matthias Zeppelzauer 1
David Koller 1
Blanca Acuña 1
Zhijun Sun 1
Marco De Gemmis 1
Sven Schutte 1
Andreas Vlachopoulos 1
Masayuki Kanbara 1
Emilio Merella 1
Chiara Leoni 1
Niels Raes 1
Wei Ma 1
Yizhou Wang 1
Xin Ma 1
Wen Gao 1
Guido Brunnett 1
Yiping Hung 1
Albert Kavelar 1
Michael Kolomenkin 1
Angelos Yannopoulos 1
César Gonzalez-Perez 1
Ayellet Tal 1
Chaya Liebeskind 1
Jonathan Schler 1
Giovanni Puglisi 1
Miguel Sanchez-Lopez 1
Eva Pietroni 1
R Carvalho 1
Jérémy Laviole 1
Xavier Granier 1
S Baldissini 1
Hera Almpanoudi 1
Xuan Wang 1
Robert Sitnik 1
Andreas Reichinger 1
Jaakko Suominen 1
Christopher Schwartz 1
Patrick Marais 1
David Smith 1
Sadek Jbara 1
Lauto Magnani 1
Kaizhong Zhang 1
Rachid Thami 1
Klaus Riede 1
Franciska De Jong 1
Michael Hofer 1
Stefano Girardi 1
Alessandro Rizzi 1
Dalibor Mitrović 1
Uğur Güdükbay 1
Isaac Besora 1
Fabiana Zeppa 1
Claus Fleischer 1
Stefano Capuzzi 1
Alexandra Poulovassilis 1
Vanessa Lardinois 1
Alonzo Addison 1
P Nieri 1
G Cox 1
I Finkel 1
Debra Norris 1
Carmen Diaz-Marin 1
Teresa Romao 1
M Melo 1
A Glushkova 1
Chihhao Yu 1
Corey Toler-Franklin 1
Anna Sivula 1
Michael Weinmann 1
Karl Grieser 1
Timothy Baldwin 1
Tsvi Kuflik 1
Nikolaos Aletras 1
Petros Daras 1
Elisa Bertino 1
Gianpaolo Palma 1
Constantin Papaodysseus 1
Dimitris Arabadjis 1
Michail Panagopoulos 1
Deyun Zhang 1
Yifeng Fan 1
Veronica Sundstedt 1
Willemijn Heeren 1
René Berndt 1
Christian Breiteneder 1
Cecilia Pisa 1
Özgür Ulusoy 1
Greg Humphreys 1
Jordi Moyes 1
Giovanni Semeraro 1
Francis Schmitt 1
Douglas Troy 1
Stephan Schreiber 1
Klaus Hinzen 1
Christos Doumas 1
Nazlena Mohamad Ali 1
Richard Brownlow 1
Luciana Martins 1
Tobias Nöll 1
Daniel O’donnell 1
Holly Rushmeier 1
Stefano Paci 1
Yingqing Xu 1
Martin Kampel 1
Hadas Zohar 1
Filippo Stanco 1
Paolo Mazzoleni 1
A Ricardo 1
F Moutarde 1
Patrick Reuter 1
Stavroula Bampatzia 1
David Arnold 1
Stefan Maierhofer 1
Benedict Brown 1
Tanguy Coenen 1
Lien Mostmans 1
Michela Mortara 1
Chiara Stefani 1
Julie Lombardo 1
Philippe Véron 1
David Bamman 1
Ariel Gorfinkel 1
Xiaojun Ding 1
Athina Kritsotaki 1
Paul Matthews 1
Stefania Serafin 1
Patrick Reuter 1
Guillaume Riviere 1
Jeremy Hutchings 1
Karl Lampe 1
Douglas Oard 1
Barbara Thuswaldner 1
Alexandrino Gonçalves 1
Markus Seidl 1
Santanu Chaudhury 1
Hiranmay Ghosh 1
Ismet Yalniz 1
Guido Ranzuglia 1
Pere Brunet 1
Pasquale Lops 1
Yann Gousseau 1
Victor Obonyo 1
Alessandro Foni 1
Peter Fornaro 1
Kyriakos Herakleous 1

Affiliation Paper Counts
University of Padua 1
Universite Victor Segalen Bordeaux 2 1
Austrian Academy of Sciences 1
University of Ioannina 1
Universiti Tenaga Nasional 1
Xi'an University of Finance and Economics 1
The University of Hong Kong 1
Spanish National Research Council 1
Free University of Bozen-Bolzano 1
Technical University of Darmstadt 1
King's College London 1
Ionian University 1
City University of Hong Kong 1
University of Waterloo 1
University of Massachusetts Amherst 1
Imperial College London 1
Ain Shams University 1
Xi'an Jiaotong University 1
Polytechnic School of Montreal 1
Foundation for Research and Technology-Hellas 1
Monash University 1
University of Maryland 1
University of Bristol 1
University of Surrey 1
Universite Paris 1 Pantheon-Sorbonne 1
Aalborg University 1
Massachusetts Institute of Technology 1
Ecole Centrale Paris 1
University of Lethbridge 1
Catholic University of Leuven 1
University of Thessaly 1
University of Bologna 1
University of New South Wales 1
Polytechnic Institute of Leiria 1
Universite Paris Descartes 1
University of Milan 1
University of Bath 1
IRIT Institut de Recherche Informatique de Toulouse 1
Ecole des Mines de Paris 1
Scuola Normale of Pisa 1
Korea Advanced Institute of Science & Technology 1
University of Cagliari 1
University of London 1
Tata Consultancy Services India 1
Hangzhou Normal University 1
Cultural Heritage Imaging, California 1
Universite de Bordeaux 1
E2v 1
University of Nicosia 1
Royal College of Art 1
Universiti Kebangsaan Malaysia 2
Istituto Di Fisica Applicata Nello Carrara 2
The British Museum 2
Lawrence Technological University 2
VRVis Research Center 2
Chemnitz University of Technology 2
Purdue University 2
University of Oslo 2
University of Dublin, Trinity College 2
National Taipei University of Technology 2
Stanford University 2
University of Tras-os-Montes and Alto Douro 2
Universidad de Zaragoza 2
Universite Mohammed V-Agdal 2
University of the West of England 2
Maulana Azad National Institute of Technology 2
The University of Warwick 2
Tufts University 2
University of Turku School of Cultural Production and Landscape Studies 2
TELECOM ParisTech 2
University of Queensland 2
Indian Institute of Technology, Delhi 2
European Commission Joint Research Centre, Ispra 2
University of Manouba 2
Zoologisches Forschungsmuseum Alexander Koenig 2
Centro de Quimica fina e Biotecnologia 2
Fondazione Bruno Kessler 2
University of Cape Town 3
University of Sheffield 3
University of Geneva 3
University of Brighton 3
University of Catania 3
Institut de Recherche et Coordination Acoustique Musique 3
Peking University 3
University of Twente 3
University of Virginia 3
Technion - Israel Institute of Technology 3
University of Cologne 3
Nara Institute of Science and Technology 3
University of California, Berkeley 3
University of Melbourne 3
Vrije Universiteit Brussel 3
University of Athens 3
Marche Polytechnic University 3
Miami University Oxford 3
Cyprus University of Technology 3
Arts et Metiers ParisTech 3
Humboldt University of Berlin 4
Bar-Ilan University 4
Warsaw University of Technology 4
University of Peloponnese 4
National Taiwan University 4
University of Bonn 4
Universitat Politecnica de Catalunya 4
Universidad Politecnica de Valencia 4
Polytechnic Institute of Turin 4
Bilkent University 4
Xiamen University 4
Italian National Research Council 4
Universidad de Granada 4
Institute of Computer Science Crete 4
German Research Center for Artificial Intelligence (DFKI) 4
National Technical University of Athens 5
Birkbeck University of London 5
National University of Singapore 5
University College London 5
University of Delaware 5
University of Pisa 5
Microsoft Research Asia 5
University of East Anglia 6
Graz University of Technology 6
University of Basel 6
New University of Lisbon 6
University of Haifa 7
Aalto University 7
CNRS Centre National de la Recherche Scientifique 8
Yale University 9
Princeton University 10
University of Bari 10
University of Genoa 13
Vienna University of Technology 15
Istituto di Scienza e Tecnologie dell'Informazione A. Faedo 19
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