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Web Futures: Inclusive, Intelligent, Sustainable The 2020 Manifesto for Web Science (Dagstuhl Perspectives Workshop 18262)

Authors Bettina Berendt , Fabien Gandon , Susan Halford , Wendy Hall , Jim Hendler , Katharina E. Kinder-Kurlanda , Eirini Ntoutsi , Steffen Staab

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Author Details

Bettina Berendt
  • TU Berlin and Weizenbaum Institute for the Networked Society, Germany
  • KU Leuven, Belgium
Fabien Gandon
  • Inria, Université Côte d’Azur, CNRS, I3S, France
Susan Halford
  • University of Bristol, UK
Wendy Hall
  • University of Southampton, UK
Jim Hendler
  • Rensselaer Polytechnic Institute, USA
Katharina E. Kinder-Kurlanda
  • University of Klagenfurt, Austria
Eirini Ntoutsi
  • Freie Universität Berlin, Germany
Steffen Staab
  • Universität Stuttgart, Germany, and University of Southampton, UK

Funding

  • Staab, Steffen: The work performed by Steffen Staab has been partially supported by EU-Project Co-Inform which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 770302.

Acknowledgements

The authors of this Manifesto are greatly indebted to the co-participants of the Dagstuhl Perspectives Workshop. We also appreciate the support and patience that Dr. Kunz and the team at Dagstuhl had with us when we took much longer than planned in putting together this Manifesto.

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Bettina Berendt, Fabien Gandon, Susan Halford, Wendy Hall, Jim Hendler, Katharina E. Kinder-Kurlanda, Eirini Ntoutsi, and Steffen Staab. Web Futures: Inclusive, Intelligent, Sustainable The 2020 Manifesto for Web Science (Dagstuhl Perspectives Workshop 18262). In Dagstuhl Manifestos, Volume 9, Issue 1, pp. 1-42, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021) https://doi.org/10.4230/DagMan.9.1.1

Abstract

This Manifesto was produced from the Perspectives Workshop 18262 entitled "10 Years of Web Science" that took place at Schloss Dagstuhl from June 24 – 29, 2018. At the Workshop, we revisited the origins of Web Science, explored the challenges and opportunities of the Web, and looked ahead to potential futures for both the Web and Web Science. 
We explain issues that society faces in the Web by the ambivalences that are inherent in the Web. All the enormous benefits that the Web offers - for information sharing, collective organization and distributed activity, social inclusion and economic growth - will always carry along negative consequences, too, and 30 years after its creation negative consequences of the Web are only too apparent.
The Web continues to evolve and its next major step will involve Artificial Intelligence (AI) at large. AI has the potential to amplify positive and negative outcomes, and we explore these possibilities, situating them within the wider debate about the future of regulation and governance for the Web. Finally, we outline the need to extend Web Science as the science that is devoted to the analysis and engineering of the Web, to strengthen our role in shaping the future of the Web and present five key directions for capacity building that are necessary to achieve this: (i), supporting interdisciplinarity, (ii), supporting collaboration, (iii), supporting the sustainable Web, (iv), supporting the Intelligent Web, and (v), supporting the Inclusive Web.
Our writing reflects our background in several disciplines of the social and technical sciences and that these disciplines emphasize topics to various extents. We are acutely aware that our observations occupy a particular point in time and are skewed towards our experience as Western scholars - a limitation that Web Science will need to overcome.

Subject Classification

ACM Subject Classification
  • Information systems → World Wide Web
  • Human-centered computing → Collaborative and social computing theory, concepts and paradigms
  • Computing methodologies → Philosophical/theoretical foundations of artificial intelligence
  • Social and professional topics → History of computing
  • Social and professional topics → Censorship
  • Social and professional topics → Surveillance
  • Social and professional topics → Network access control
Keywords
  • Web Science
  • Artificial Intelligence
  • Web Governance
  • Capacity Building

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References

  1. Giovanni Allegretti and Sofia Antunes. The Lisbon participatory budget: results and perspectives on an experience in slow but continuous transformation. Field Actions Science Reports. The journal of field actions, Special Issue 11, 2014. Google Scholar
  2. S. Amsler and K. Facer. Contesting anticipatory regimes in education: exploring alternative educational orientations towards the future. Futures, 94:6-14, 2017. Google Scholar
  3. A. Appadurai. The Future as Cultural Fact. Verso, London, 2013. Google Scholar
  4. Ross Ashby. Design for an intelligence-amplifier. Automata studies, 400:215-233, 1956. Google Scholar
  5. Ipek Baris, Lukas Schmelzeisen, and Steffen Staab. CLEARumor at SemEval-2019 task 7: Convolving ELMo against rumors. In Proceedings of the 13th International Workshop on Semantic Evaluation, SemEval@NAACL-HLT 2019, Minneapolis, MN, USA, June 6-7, 2019, pages 1105-1109, 2019. URL: https://www.aclweb.org/anthology/S19-2193/, URL: https://doi.org/10.18653/v1/s19-2193.
  6. Bettina Berendt. AI for the common good?! Pitfalls, challenges, and ethics pen-testing. Paladyn, 10(1):44-65, 2019. URL: https://doi.org/10.1515/pjbr-2019-0004.
  7. Tim Berners-Lee, Robert Cailliau, Ari Luotonen, Henrik Frystyk Nielsen, and Arthur Secret. The World-Wide Web. Commun. ACM, 37(8):76-82, 1994. URL: https://doi.org/10.1145/179606.179671.
  8. Tim Berners-Lee, Wendy Hall, James Hendler, Nigel Shadbolt, and Daniel J Weitzner. Creating a science of the Web. Science, 313(5788):769-771, 2006. Google Scholar
  9. M. Bevir. Governance: A very short introduction. Oxford University Press, Oxford, UK, 2012. Google Scholar
  10. J. Bowker and S.L. Starr. Sorting Things Out: Classification and its’ consequences. MIT Press, Cambridge, MA., 1999. Google Scholar
  11. Irene Celino, Oscar Corcho, Franz Hölker, and Elena Simperl. Citizen science: design and engagement (dagstuhl seminar 17272). In Dagstuhl reports, volume 7. Schloss Dagstuhl-Leibniz-Zentrum fuer Informatik, 2018. Google Scholar
  12. Karin Knorr Cetina. Epistemic cultures: How the sciences make knowledge. Harvard University Press, 2009. Google Scholar
  13. Andrei Ciortea, Simon Mayer, Fabien Gandon, Olivier Boissier, Alessandro Ricci, and Antoine Zimmermann. A Decade in Hindsight: The Missing Bridge Between Multi-Agent Systems and the World Wide Web. In AAMAS 2019 - 18th International Conference on Autonomous Agents and Multiagent Systems, page 5p, Montréal, Canada, 2019. URL: https://hal-emse.ccsd.cnrs.fr/emse-02070625.
  14. European Commission. Ethics guidelines for trustworthy ai, 2019. URL: https://ec.europa.eu/digital-single-market/en/news/ethics-guidelines-trustworthy-ai.
  15. European Commission. On Artificial Intelligence - a European approach to excellence and trust. Technical report, European Commission, Brussels, BE, February 2020. Whitepaper. URL: https://ec.europa.eu/info/sites/info/files/commission-white-paper-artificial-intelligence-feb2020_en.pdf.
  16. ACM US Public Policy Council, 2017. URL: https://www.acm.org/binaries/content/assets/public-policy/2017_usacm_statement_algorithms.pdf.
  17. Loy D. Watley. Training in ethical judgment with a modified Potter box. Business Ethics: A European Review, 23(1):1-14, 2014. URL: https://doi.org/10.1111/beer.12034.
  18. Mathieu d'Aquin, Pinelopi Troullinou, Noel E. O'Connor, Aindrias Cullen, Gráinne Faller, and Louise Holden. Towards an "ethics by design" methodology for AI research projects. In Jason Furman, Gary E. Marchant, Huw Price, and Francesca Rossi, editors, Proceedings of the 2018 AAAI/ACM Conference on AI, Ethics, and Society, AIES 2018, New Orleans, LA, USA, February 02-03, 2018, pages 54-59. ACM, 2018. URL: https://doi.org/10.1145/3278721.3278765.
  19. María Puig de La Bellacasa. Matters of care: Speculative ethics in more than human worlds, volume 41. U of Minnesota Press, 2017. Google Scholar
  20. R. De Wolf, E. Vanderhoven, B. Berendt, J. Pierson, and T. Schellens. Self-reflection on privacy research in social networking sites. Behaviour & Information Technology, 36(5):459–469, 2017. Google Scholar
  21. R. Dean, J. Boswell, and G. Smith. Designing democratic innovations as deliberative systems: The ambitious case of NHS citizen. Political Studies, 2019. Advanced online publication. doi:10.1177/0032321719866002. Google Scholar
  22. Ronald J. Deibert, John G. Palfrey, Rafal Rohozinski, and Jonathan Zittrain. Access Denied: The Practice and Policy of Global Internet Filtering (Information Revolution and Global Politics). MIT Press, 2008. Google Scholar
  23. CGIL (Confederazione Generale Italiana del Lavoro [Italian General Confederation of Labour]. Riders: CGIL, causa contro multinazionale food delivery per condotta discriminatoria, algoritmo penalizza diritti di sciopero e malattia, 2019. URL: http://www.cgil.it/riders-cgil-causa-contro-multinazionale-food-delivery-per-condotta-discriminatoria-algoritmo-penalizza-diritti-di-sciopero-e-malattia/.
  24. L. DeNardis and M. Raymond. Thinking clearly about multistakeholder internet governance. In GigaNet: Global Internet Governance Academic Network, Annual Symposium 2013, 2013. Available at SSRN: https://ssrn.com/abstract=2354377 or URL: http://dx.doi.org/10.2139/ssrn.2354377.
  25. Deutscher Bundestag – Wissenschaftliche Dienste. Regulierung von Hate Speech und Fake News in sozialen Netzwerken durch EU-Mitgliedstaaten [regulation of hate speech and fake news in social networks by eu member states], 2018. WD 10-3000 -032/18, URL: https://www.bundestag.de/resource/blob/566942/a5eb997872bbe5dbca3f47112eb04c46/wd-10-032-18-pdf-data.pdf.
  26. Virginia Dignum, Catelijne Muller, and Andreas Theodorou. First analysis of the EU whitepaper on ai. Technical report, ALLAI, February 2020. URL: http://allai.nl/first-analysis-of-the-eu-whitepaper-on-ai/.
  27. European Data Protection Board (EDPD). Guidelines 04/2020 on the use of location data and contact tracing tools in the context of the COVID-19 outbreak, 21 April 2020. URL: https://edpb.europa.eu/sites/edpb/files/files/file1/edpb_guidelines_20200420_contact_tracing_covid_with_annex_en.pdf.
  28. Douglas C Engelbart. Augmenting human intellect: A conceptual framework. SRI Summary Report AFOSR-3223, Stanford Research Institute, 1962. Google Scholar
  29. Omer Farooq, Salman Ahmed Khan, and Sadaf Khalid. Financial ethics: A review of 2010 flash crash. International Journal of Computer and Information Engineering, 8(6):1652-1654, 2014. Google Scholar
  30. Roy T Fielding and Richard N Taylor. Principled design of the modern Web architecture. ACM Transactions on Internet Technology (TOIT), 2(2):115-150, 2002. Google Scholar
  31. The IEEE Global Initiative for Ethical Considerations in Artificial Intelligence and Autonomous Systems, 2016. URL: http://standards.ieee.org/develop/indconn/ec/ead_v1.pdf.
  32. B. Fox. Campaigners lock horns with EU justice chief on ‘hate speech’, 2018. EURACTIV, URL: https://www.euractiv.com/section/freedom-of-thought/news/campaigners-lock-horns-with-eu-justice-chief-on-hate-speech/.
  33. Peter Fox and James Hendler. Changing the equation on scientific data visualization. Science, 331(6018):705-708, 2011. Google Scholar
  34. Fabien Gandon. The three 'W' of the World Wide Web call for the three 'M' of a Massively Multidisciplinary Methodology. In Valérie Monfort and Karl-Heinz Krempels, editors, WEBIST 2014 - 10th International Conference, volume 226 of Web Information Systems and Technologies, Barcelona, Spain, 2014. Springer International Publishing. URL: https://doi.org/10.1007/978-3-319-27030-2.
  35. Fabien Gandon. For everything: Tim Berners-Lee, winner of the 2016 Turing award for having invented… the Web. 1024 : Bulletin de la Société Informatique de France, 11:21, 2017. URL: https://hal.inria.fr/hal-01843967.
  36. Fabien Gandon, Michel Buffa, Elena Cabrio, Olivier Corby, Catherine Faron Zucker, Alain Giboin, Nhan Le Thanh, Isabelle Mirbel, Peter Sander, Andrea G. B. Tettamanzi, and Serena Villata. Challenges in Bridging Social Semantics and Formal Semantics on the Web. In Hammoudi, S., Cordeiro, J., Maciaszek, L.A., Filipe, and J., editors, 5h International Conference, ICEIS 2013, volume 190 of Lecture Notes in Business Information Processing, pages 3-15, Angers, France, 2013. Springer. URL: https://hal.inria.fr/hal-01059273.
  37. Fabien Gandon and Alain Giboin. Paving the WAI: Defining Web-Augmented Interactions. In Web Science 2017 (WebSci17), pages 381-382, Troy, NY, United States, 2017. URL: https://doi.org/10.1038/nbt0609-508.
  38. Paul Gaskell. Forecasting financial markets with online information. PhD thesis, University of Southampton, Faculty of Business, Law and Art, 2015. URL: https://eprints.soton.ac.uk/393779/.
  39. K. Georgiou, S. Xavier-de-Souza, and K. Eder. The IoT energy challenge: A software perspective. IEEE Embedded Systems Letters, 10(3):53-56, September 2018. URL: https://doi.org/10.1109/LES.2017.2741419.
  40. L. Gill, D. Redeker, and U. Gasser. Towards digital constitutionalism? Mapping attempts to craft an internet bill of rights. Technical report, Berkman Center Research Publication No. 2015-15, 2015. Available at SSRN: https://ssrn.com/abstract=2687120 or http://dx.doi.org/10.2139/ssrn.2687120 .
  41. Christophe Guéret, Victor de Boer, and Stefan Schlobach. Let’s "downscale" linked data. IEEE Internet Computing, 18(2):70-73, 2014. Google Scholar
  42. Seda Gurses, Rebekah Overdorf, and Ero Balsa. POTs: The revolution will not be optimized? CoRR, abs/1806.02711, 2018. URL: http://arxiv.org/abs/1806.02711.
  43. Susan Halford and M. Savage. Speaking sociologically with Big Data: Symphonic social science and the future for Big Data research. Sociology, 51(6):1132-1148, 2017. Google Scholar
  44. James A. Hendler, Wendy Hall, and Noshir Contractor. Web science: Now more than ever. IEEE Computer, 51(6):12-17, 2018. URL: https://doi.org/10.1109/MC.2018.2701637.
  45. Aidan Hogan, Eva Blomqvist, Michael Cochez, Claudia d'Amato, Gerard de Melo, Claudio Gutierrez, José Emilio Labra Gayo, Sabrina Kirrane, Sebastian Neumaier, Axel Polleres, Roberto Navigli, Axel-Cyrille Ngonga Ngomo, Sabbir M. Rashid, Anisa Rula, Lukas Schmelzeisen, Juan Sequeda, Steffen Staab, and Antoine Zimmermann. Knowledge graphs, 2020. URL: http://arxiv.org/abs/2003.02320.
  46. Viktória Ilková and Adrian Ilka. Legal aspects of autonomous vehicles – an overview. In Proceedings of the 2017 21st International Conference on Process Control (PC), Štrbské Pleso, Slovakia, June 6 – 9, pages 428-433, 2017. URL: https://doi.org/10.1109/PC.2017.7976252.
  47. Emma A. Jane. Online misogyny and feminist digilantism. Continuum, 30(3):284-297, 2016. URL: https://doi.org/10.1080/10304312.2016.1166560.
  48. N. Jones. How to stop data centres from gobbling up the world’s electricity. Nature, 561:163-166, 2018. URL: https://doi.org/10.1038/d41586-018-06610-y.
  49. Katharina E Kinder-Kurlanda. Ethnography in a computer science centered project. In ICC'14 Workshop, ACM WebSci'14 Conference, Bloomington. Online: http://www. icc. ecs. soton. ac. uk/papers/icc14_submission_2. pdf, 2014. Google Scholar
  50. Dave Lee. How scientology changed the internet. BBC News, 2013. URL: https://www.bbc.com/news/technology-23273109.
  51. L. Lessig. Code and Other Laws of Cyberspace. Basic Books, 1999. Google Scholar
  52. Amanda Levendowski. Using copyright to combat revenge porn. 3 N.Y.U. J. INTELL. PROP. & ENT. L., pages 422-446, 2014. Available at SSRN: https://ssrn.com/abstract=2374119 or URL: http://dx.doi.org/10.2139/ssrn.2374119.
  53. R. Levitas. Utopia as Method: the imaginary reconstitution of society. Palgrave Macmillan, London, 2013. Google Scholar
  54. Annette Markham. Fabrication as ethical practice: Qualitative inquiry in ambiguous internet contexts. Information, Communication & Society, 15(3):334-353, 2012. Google Scholar
  55. Aryn Martin, Natasha Myers, and Ana Viseu. The politics of care in technoscience. Social Studies of Science, 45(5):625-641, 2015. Google Scholar
  56. John McCarthy, Marvin Minsky, Nathaniel Rochester, and Claude Shannon. A proposal for the Dartmouth summer research project on Artificial Intelligence, August 1955. URL: http://raysolomonoff.com/dartmouth/boxa/dart564props.pdf.
  57. Panagiotis Takis Metaxas and Eni Mustafaraj. From obscurity to prominence in minutes: Political speech and real-time search. In Proceedings of the WebSci10: Extending the Frontiers of Society On-Line, April 2010. Google Scholar
  58. Luc Moreau, Paul T. Groth, James Cheney, Timothy Lebo, and Simon Miles. The rationale of PROV. J. Web Semant., 35:235-257, 2015. URL: https://doi.org/10.1016/j.websem.2015.04.001.
  59. Eni Mustafaraj and Panagiotis Takis Metaxas. The fake news spreading plague: Was it preventable? In Proceedings of the 2017 ACM on Web Science Conference, WebSci 2017, Troy, NY, USA, June 25 - 28, 2017, pages 235-239, 2017. URL: https://doi.org/10.1145/3091478.3091523.
  60. CNIL (Commission nationale de l'informatique et des libertés). La CNIL publie son deuxième avis adressé au parlement sur les conditions de mise en œuvre de SI-DEP, Contact Covid, Vaccin COVID et TousAntiCovid [The CNIL publishes its second advice to parliament about the conditions of implementation of SI-DEP, Contact Covid, Vaccin COVID and TousAntiCovid], 21 January 2021. URL: https://www.cnil.fr/fr/la-cnil-publie-son-deuxieme-avis-adresse-au-parlement-sur-les-conditions-de-mise-en-oeuvre-de-si-dep.
  61. Gina Neff and Peter Nagy. Automation, algorithms, and politics - talking to bots: Symbiotic agency and the case of Tay. International Journal of Communication, 10:17, 2016. Google Scholar
  62. Eirini Ntoutsi, Pavlos Fafalios, Ujwal Gadiraju, Vasileios Iosifidis, Wolfgang Nejdl, Maria-Esther Vidal, Salvatore Ruggieri, Franco Turini, Symeon Papadopoulos, Emmanouil Krasanakise, Ioannis Kompatsiaris, Katharina Kinder-Kurlanda, Claudia Wagner, Fariba Karimi, Miriam Fernandez, Harith Alani, Bettina Berendt, Tina Kruegel, Christian Heinze, Klaus Broelemann, Gjergji Kasneci, Thanassis Tiropanis, and Steffen Staab. Bias in data-driven AI systems - an introductory survey. WIREs Data Mining and Knowledge Discovery, 2020. URL: https://doi.org/10.1002/widm.1356.
  63. AoIR (Association of Internet Researchers), 2012. URL: https://aoir.org/reports/ethics2.pdf.
  64. Kieron O’Hara and Wendy Hall. Four internets: The geopolitics of digital governance. Center for International Governance Innovation, 206, December 2018. URL: https://www.cigionline.org/publications/four-internets-geopolitics-digital-governance.
  65. J.R. Reidenberg. Lex informatica: The formulation of information policy rules through technology. Texas Law Review, 76:553-593, 1998. Google Scholar
  66. S. Saad, S. Bazan, and C. Varin. Asymmetric cyberwarfare between Israel and Hezbollah: The Web as a new strategic battlefield. In Poster Proceedings WebSci'11, June 14-17 2011, Koblenz, Germany, pages 1-4, 2011. Google Scholar
  67. Sabrine Saad, Muriel Chamoun, and Stéphane B. Bazan. Infowar on the web: When the caliphate goes online. In Proceedings of the ACM Web Science Conference, WebSci 2015, Oxford, United Kingdom, June 28 - July 1, 2015, pages 53:1-53:3, 2015. URL: https://doi.org/10.1145/2786451.2786487.
  68. Michel Serres. The natural contract. University of Michigan Press, 1995. Google Scholar
  69. Scott Shane and Daisuke Wakabayashi. ‘the business of war’: Google employees protest work for the Pentagon. The New York Times, 2018. URL: https://www.nytimes.com/2018/04/04/technology/google-letter-ceo-pentagon-project.html.
  70. Tamar Sharon. Blind-sided by privacy? digital contact tracing, the apple/google api and big tech’s newfound role as global health policy makers. Ethics and Information Technology, 2020. URL: https://doi.org/10.1007/s10676-020-09547-x.
  71. Phil Simon. How nextdoor addressed racial profiling on its platform. Harvard Business Review, 2018. URL: https://hbr.org/2018/05/how-nextdoor-addressed-racial-profiling-on-its-platform.
  72. Steffen Staab, Susan Halford, and Wendy Hall. Web Science in Europe: beyond boundaries. Commun. ACM, 62(4):74, 2019. URL: https://doi.org/10.1145/3312569.
  73. Emma Strubell, Ananya Ganesh, and Andrew McCallum. Energy and Policy Considerations for Deep Learning in NLP. arXiv e-prints, page arXiv:1906.02243, June 2019. URL: http://arxiv.org/abs/1906.02243.
  74. Mengfan Tang, Pranav Agrawal, and Ramesh Jain. Habits vs environment: What really causes asthma? In Proceedings of the ACM Web Science Conference, pages 1-5, 2015. Google Scholar
  75. The speakers commission on digital democracy:, 2015. URL: http://www.parliament.uk/business/commons/the-speaker/speakers-commission-on-digital-democracy/.
  76. Ramin Tinati, Susan Halford, Les Carr, and Catherine Pope. Big Data: methodological challenges and approaches for sociological analysis. Sociology, 48(4):663-681, 2014. Google Scholar
  77. Thanassis Tiropanis, Wendy Hall, Nigel Shadbolt, David De Roure, Noshir Contractor, and Jim Hendler. The Web Science observatory. IEEE Intelligent Systems, 28(2):100-104, 2013. Google Scholar
  78. Jon Truby. Decarbonizing bitcoin: Law and policy choices for reducing the energy consumption of blockchain technologies and digital currencies. Energy Research & Social Science, 44:399-410, 2018. URL: https://doi.org/10.1016/j.erss.2018.06.009.
  79. Gert Jan van Hardeveld, Craig Webber, and Kieron O’Hara. Deviating from the cybercriminal script: Exploring tools of anonymity (mis)used by carders on cryptomarkets. American Behavioral Scientist, 61:1244-1266, October 2017. Google Scholar
  80. Ricardo Vinuesa, Hossein Azizpour, Iolanda Leite, Madeline Balaam, Virginia Dignum, Sami Domisch, Anna Felländer, Simone Daniela Langhans, Max Tegmark, and Francesco Fuso Nerini. The role of Artificial Intelligence in achieving the Sustainable Development Goals. Nature Communications, 11(1):233, 2020. URL: https://doi.org/10.1038/s41467-019-14108-y.
  81. Jennifer Welch, Susan Halford, and Mark Weal. Conceptualising the Web for post-conflict governance building. Peacebuilding, 3(1):58-74, 2014. Google Scholar
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