skip to main content
10.1145/3461778.3462090acmconferencesArticle/Chapter ViewAbstractPublication PagesdisConference Proceedingsconference-collections
research-article
Open Access

Designing Direct Interactions with Bioluminescent Algae

Authors Info & Claims
Published:28 June 2021Publication History

ABSTRACT

Living matter is an emerging topic of interest in HCI as researchers are recognizing the unique affordances of biological materials. We explore direct interactions with Dinoflagellates, bioluminescent algae that produce light when exposed to oxygen through physical stimulation. Leveraging Dinoflagellates’ natural feedback mechanism, we propose directly engaging the human user with the organism through physical kinetic interactions. We take an organism-centered design approach, considering the well-being of the organism by focusing first on designing appropriate environments for the organism, then proceeding to exploring the available interactions within these environments. Our framework consists of four components (form, reception, feedback, and control) and can be used to guide designers in their design process with living matter. We demonstrate the framework with environments for Dinoflagellates and three real-life examples: a checkers game, a ball game. and hopscotch. Last, we discuss the constraints and limitations of integrating Dinoflagellates and living matter in interactive systems.

Skip Supplemental Material Section

Supplemental Material

Designing_Direct_Interactions_with_Bioluminescent_Algae.mp4

mp4

166.7 MB

References

  1. Mirela Alistar and Margherita Pevere. 2020. Semina Aeternitatis: Using Bacteria for Tangible Interaction with Data. In Extended Abstracts of the 2020 CHI Conference on Human Factors in Computing Systems. 1–13.Google ScholarGoogle Scholar
  2. Gilles Bailly, Sidharth Sahdev, Sylvain Malacria, and Thomas Pietrzak. 2016. LivingDesktop: Augmenting desktop workstation with actuated devices. In Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems. 5298–5310.Google ScholarGoogle ScholarDigital LibraryDigital Library
  3. Bahareh Barati, Elvin Karana, Kaspar MB Jansen, and Stan Claus. 2018. Making’a drop of light’: an illustrative case of designing for electroluminescent material experiences. International Journal of Design Engineering 8, 2 (2018), 170–196.Google ScholarGoogle ScholarCross RefCross Ref
  4. Fiona Bell, Alice Hong, Andreea Danielescu, Aditi Maheshwari, Ben Greenspan, Hiroshi Ishii, Laura Devendorf, and Mirela Alistar. 2021. Self-deStaining Textiles: Designing Interactive Systems with Fabric, Stains and Light. In Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems.Google ScholarGoogle ScholarDigital LibraryDigital Library
  5. [5] Erika Blumenfeld.2016. Retrieved February 2, 2021 from https://erikablumenfeld.com/works/bioluminescence/Google ScholarGoogle Scholar
  6. [6] BTMETER.2020. Retrieved August 12, 2020 from https://www.amazon.com/stores/BTMETER/page/0BCF3C8A-52A3-4F3D-9322-154B2676C255?ref_=ast_blnGoogle ScholarGoogle Scholar
  7. Richard Buchanan. 1998. Branzi’s dilemma: design in contemporary culture. Design Issues 14, 1 (1998), 3–20.Google ScholarGoogle ScholarCross RefCross Ref
  8. Serena Camere and Elvin Karana. 2018. Fabricating materials from living organisms: An emerging design practice. Journal of Cleaner Production 186 (2018), 570–584.Google ScholarGoogle ScholarCross RefCross Ref
  9. Yves Candau, Jules Françoise, Sarah Fdili Alaoui, and Thecla Schiphorst. 2017. Cultivating kinaesthetic awareness through interaction: Perspectives from somatic practices and embodied cognition. In Proceedings of the 4th International Conference on Movement Computing. 1–8.Google ScholarGoogle ScholarDigital LibraryDigital Library
  10. SS Chang, BB Prezelin, and RK Trench. 1983. Mechanisms of photoadaptation in three strains of the symbiotic dinoflagellate Symbiodinium microadriaticum. Marine Biology 76, 3 (1983), 219–229.Google ScholarGoogle ScholarCross RefCross Ref
  11. Adrian David Cheok, Roger Thomas Kok, Chuen Tan, Owen Noel Newton Fernando, Tim Merritt, and Janyn Yen Ping Sen. 2008. Empathetic living media. In Proceedings of the 7th ACM conference on Designing interactive systems. 465–473.Google ScholarGoogle ScholarDigital LibraryDigital Library
  12. Alan Cooper. 1999. ”The inmates are running the asylum. Indianapolis, IA: SAMS”. Macmillan (1999).Google ScholarGoogle ScholarCross RefCross Ref
  13. Paul Coulton and Joseph Galen Lindley. 2019. More-than human centred design: Considering other things. The Design Journal 22, 4 (2019), 463–481.Google ScholarGoogle ScholarCross RefCross Ref
  14. Ingrid De Pauw, Prabhu Kandachar, Elvin Karana, David Peck, and Renee Wever. 2010. Nature inspired design: Strategies towards sustainability. (2010).Google ScholarGoogle Scholar
  15. Dennis E Desjardin, Anderson G Oliveira, and Cassius V Stevani. 2008. Fungi bioluminescence revisited. Photochemical & Photobiological Sciences 7, 2 (2008), 170–182.Google ScholarGoogle ScholarCross RefCross Ref
  16. Hugh Dubberly, Paul Pangaro, and Usman Haque. 2009. ON MODELING What is interaction? are there different types?interactions 16, 1 (2009), 69–75.Google ScholarGoogle Scholar
  17. Karen El Asmar. 2019. Social Microbial Prosthesis: Towards Super-Organism Centered Design. In Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems. 1–7.Google ScholarGoogle ScholarDigital LibraryDigital Library
  18. Joanne Engebrecht, Kenneth Nealson, and Michael Silverman. 1983. Bacterial bioluminescence: isolation and genetic analysis of functions from Vibrio fischeri. Cell 32, 3 (1983), 773–781.Google ScholarGoogle ScholarCross RefCross Ref
  19. Sidney Fels. 2000. Intimacy and embodiment: implications for art and technology. In Proceedings of the 2000 ACM workshops on Multimedia. 13–16.Google ScholarGoogle ScholarDigital LibraryDigital Library
  20. [20] DIY Bio An Institution for the Do-It-Yourself Biologist.2020. Retrieved September 16, 2020 from https://diybio.orgGoogle ScholarGoogle Scholar
  21. Karmen Franinović and Luke Franzke. 2015. Luminous matter. Electroluminescent paper as an active material. In Proceedings of the International Conference on Design and Semantics of Form and Movement. 37–47.Google ScholarGoogle Scholar
  22. Gilad Gome, Julian Waksberg, Andrey Grishko, Iddo Yehoshua Wald, and Oren Zuckerman. 2019. OpenLH: open liquid-handling system for creative experimentation with biology. In Proceedings of the Thirteenth International Conference on Tangible, Embedded, and Embodied Interaction. 55–64.Google ScholarGoogle ScholarDigital LibraryDigital Library
  23. David S Goodsell. 2009. The machinery of life. Springer Science & Business Media.Google ScholarGoogle Scholar
  24. Phillip Gough, Larissa Pschetz, Naseem Ahmadpour, Leigh-Anne Hepburn, Clare Cooper, Carolina Ramirez-Figueroa, and Oron Catts. 2020. The Nature of biodesigned systems: Directions for HCI. In Companion Publication of the 2020 ACM Designing Interactive Systems Conference. 389–392.Google ScholarGoogle ScholarDigital LibraryDigital Library
  25. Andreas Greiner and Sunlay Almeida Rodriguez. 2014. Toccata for Pyrocystis Fusiformis. (2014). Retrieved February 2, 2021 from http://www.andreasgreiner.com/works/toccata-for-pyrocystis-fusiformis/Google ScholarGoogle Scholar
  26. Foad Hamidi and Melanie Baljko. 2017. Engaging children using a digital living media system. In Proceedings of the 2017 Conference on Designing Interactive Systems. 711–723.Google ScholarGoogle ScholarDigital LibraryDigital Library
  27. Tom Hitron, Idan David, Netta Ofer, Andrey Grishko, Iddo Yehoshua Wald, Hadas Erel, and Oren Zuckerman. 2018. Digital Outdoor play: Benefits and risks from an interaction design perspective. In Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems. 1–13.Google ScholarGoogle ScholarDigital LibraryDigital Library
  28. David Holstius, John Kembel, Amy Hurst, Peng-Hui Wan, and Jodi Forlizzi. 2004. Infotropism: living and robotic plants as interactive displays. In Proceedings of the 5th conference on Designing interactive systems: processes, practices, methods, and techniques. 215–221.Google ScholarGoogle ScholarDigital LibraryDigital Library
  29. Kristina Höök, Anna Ståhl, Martin Jonsson, Johanna Mercurio, Anna Karlsson, and Eva-Carin Banka Johnson. 2015. Cover story somaesthetic design. interactions 22, 4 (2015), 26–33.Google ScholarGoogle Scholar
  30. Caroline Hummels, Kees CJ Overbeeke, and Sietske Klooster. 2007. Move to get moved: a search for methods, tools and knowledge to design for expressive and rich movement-based interaction. Personal and Ubiquitous Computing 11, 8 (2007), 677–690.Google ScholarGoogle ScholarDigital LibraryDigital Library
  31. Hiroshi Ishii. 2008. Tangible bits: beyond pixels. In Proceedings of the 2nd international conference on Tangible and embedded interaction. xv–xxv.Google ScholarGoogle ScholarDigital LibraryDigital Library
  32. Hiroshi Ishii, Dávid Lakatos, Leonardo Bonanni, and Jean-Baptiste Labrune. 2012. Radical atoms: beyond tangible bits, toward transformable materials. interactions 19, 1 (2012), 38–51.Google ScholarGoogle ScholarDigital LibraryDigital Library
  33. Yuhua Jin, Isabel Qamar, Michael Wessely, and Stefanie Mueller. 2020. Photo-Chromeleon: Re-Programmable Multi-Color Textures Using Photochromic Dyes. In Special Interest Group on Computer Graphics and Interactive Techniques Conference Emerging Technologies. 1–2.Google ScholarGoogle Scholar
  34. Eduard Kac. 1999. GENESIS. (1999). Retrieved February 2, 2021 from http://www.ekac.org/geninfo.htmlGoogle ScholarGoogle Scholar
  35. Elvin Karana, Bahareh Barati, and Elisa Giaccardi. 2020. Living artefacts: Conceptualizing livingness as a material quality in everyday artefacts. International Journal of Design 14, 3 (2020), 37–53.Google ScholarGoogle Scholar
  36. Jansen Kaspar, Bahareh Barati, and Stan Claus. 2016. A drop of light. (2016). Retrieved February 2, 2021 from https://www.tudelft.nl/en/ide/research/research-labs/emerging-materials-lab/electroluminescence/a-drop-of-lightGoogle ScholarGoogle Scholar
  37. Jansen Kaspar, Frans Taminiau, and Linda Plaude. 2016. Awearable. (2016). Retrieved February 2, 2021 from https://www.tudelft.nl/en/ide/research/research-labs/emerging-materials-lab/electroluminescence/awearableGoogle ScholarGoogle Scholar
  38. Jansen research group Kaspar. 2016. Electroluminescence Strip Lamp. (2016). Retrieved February 2, 2021 from https://www.tudelft.nl/en/ide/research/research-labs/emerging-materials-lab/electroluminescence/electroluminiscence-strip-lampGoogle ScholarGoogle Scholar
  39. Honesty Kim, Lukas Cyrill Gerber, Daniel Chiu, Seung Ah Lee, Nate J Cira, Sherwin Yuyang Xia, and Ingmar H Riedel-Kruse. 2016. LudusScope: accessible interactive smartphone microscopy for life-science education. PloS one 11, 10 (2016), e0162602.Google ScholarGoogle ScholarCross RefCross Ref
  40. Rebecca Klee and Siouxsie Wiles. 2013. Living Light. Retrieved February 2, 2021 from https://www.youtube.com/watch?v=XupGVZB0Y5Y&feature=emb_titleGoogle ScholarGoogle Scholar
  41. Satoshi Kuribayashi, Yusuke Sakamoto, and Hiroya Tanaka. 2007. I/O plant: a tool kit for designing augmented human-plant interactions. In CHI’07 extended abstracts on Human factors in computing systems. 2537–2542.Google ScholarGoogle Scholar
  42. Stacey Kuznetsov, Carrie Doonan, Nathan Wilson, Swarna Mohan, Scott E Hudson, and Eric Paulos. 2015. DIYbio things: open source biology tools as platforms for hybrid knowledge production and scientific participation. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems. 4065–4068.Google ScholarGoogle ScholarDigital LibraryDigital Library
  43. Michael I Latz. 2019. The Making of Infinity Cube, a Bioluminescence Art Exhibit. Limnology and Oceanography Bulletin 28, 4 (2019), 130–134.Google ScholarGoogle ScholarCross RefCross Ref
  44. Andrew Lau. 2004. Life Centered Design–A Paradigm For Engineering In The 21 St Century. In 2004 Annual Conference. 9–866.Google ScholarGoogle ScholarCross RefCross Ref
  45. Seung Ah Lee, Engin Bumbacher, Alice M Chung, Nate Cira, Byron Walker, Ji Young Park, Barry Starr, Paulo Blikstein, and Ingmar H Riedel-Kruse. 2015. Trap it! A playful human-biology interaction for a museum installation. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems. 2593–2602.Google ScholarGoogle Scholar
  46. Jen Liu, Daragh Byrne, and Laura Devendorf. 2018. Design for collaborative survival: An inquiry into human-fungi relationships. In Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems. 1–13.Google ScholarGoogle ScholarDigital LibraryDigital Library
  47. Clara Mancini. 2011. Animal-computer interaction: a manifesto. interactions 18, 4 (2011), 69–73.Google ScholarGoogle ScholarDigital LibraryDigital Library
  48. Clara Mancini. 2017. Towards an animal-centred ethics for Animal–Computer Interaction. International Journal of Human-Computer Studies 98 (2017), 221–233.Google ScholarGoogle ScholarDigital LibraryDigital Library
  49. Samuel Mann and LG Smith. 2008. Biomimicry as a super systems metaphor for software engineering. In 21st Annual Conference of the National Advisory Committee on Computing Qualifications, Supplementary Proceedings, Auckland. Citeseer.Google ScholarGoogle Scholar
  50. Marta de Menezes. 2003. The artificial natural: manipulating butterfly wing patterns for artistic purposes. Leonardo 36, 1 (2003), 29–32.Google ScholarGoogle ScholarCross RefCross Ref
  51. Timothy Merritt, Foad Hamidi, Mirela Alistar, and Marta DeMenezes. 2020. Living media interfaces: a multi-perspective analysis of biological materials for interaction. Digital Creativity 31, 1 (2020), 1–21.Google ScholarGoogle ScholarCross RefCross Ref
  52. Timothy Merritt, Christine Linding Nielsen, Frederik Lund Jakobsen, and Jens Emil Grønbæk. 2017. GlowPhones: Designing for Proxemics Play with Low-Resolution Displays in Location-based Games.. In CHI PLAY. 69–81.Google ScholarGoogle Scholar
  53. Hideshi Nakamura, Yoshito Kishi, Osamu Shimomura, David Morse, and J Woodland Hastings. 1989. Structure of dinoflagellate luciferin and its enzymic and nonenzymic air-oxidation products. Journal of the American Chemical Society 111, 19 (1989), 7607–7611.Google ScholarGoogle ScholarCross RefCross Ref
  54. Iohanna Nicenboim, Elisa Giaccardi, Marie Louise Juul Søndergaard, Anuradha Venugopal Reddy, Yolande Strengers, James Pierce, and Johan Redström. 2020. More-Than-Human Design and AI: In Conversation with Agents. In Companion Publication of the 2020 ACM Designing Interactive Systems Conference. 397–400.Google ScholarGoogle ScholarDigital LibraryDigital Library
  55. Donald A Norman. 1988. The Psychology of Everyday Things, New York, Basic Book. paperback as the Design of Everyday Things(1988), 1990.Google ScholarGoogle Scholar
  56. Kalle Olli and Donald M Anderson. 2002. High encystment success of the dinoflagellate Scrippsiella cf. lachrymosa in culture experiments 1. Journal of Phycology 38, 1 (2002), 145–156.Google ScholarGoogle ScholarCross RefCross Ref
  57. Amanda Parkes and Connor Dickie. 2013. A biological imperative for interaction design. In CHI’13 Extended Abstracts on Human Factors in Computing Systems. 2209–2218.Google ScholarGoogle Scholar
  58. Amanda Parkes, Ivan Poupyrev, and Hiroshi Ishii. 2008. Designing kinetic interactions for organic user interfaces. Commun. ACM 51, 6 (2008), 58–65.Google ScholarGoogle ScholarDigital LibraryDigital Library
  59. Pat Pataranutaporn, Todd Ingalls, and Ed Finn. 2018. Biological HCI: towards integrative interfaces between people, computer, and biological materials. In Extended Abstracts of the 2018 CHI Conference on Human Factors in Computing Systems. 1–6.Google ScholarGoogle ScholarDigital LibraryDigital Library
  60. Pat Pataranutaporn, Angela Vujic, David S Kong, Pattie Maes, and Misha Sra. 2020. Living bits: Opportunities and challenges for integrating living microorganisms in human-computer interaction. In Proceedings of the Augmented Humans International Conference. 1–12.Google ScholarGoogle ScholarDigital LibraryDigital Library
  61. [61] PetSmart.2021. Retrieved February 2, 2021 from https://www.petsmart.comGoogle ScholarGoogle Scholar
  62. [62] PyroFarms.2021. Retrieved February 2, 2021 from https://fritzaquatics.comGoogle ScholarGoogle Scholar
  63. [63] PyroFarms.2021. Retrieved February 2, 2021 from https://pyrofarms.comGoogle ScholarGoogle Scholar
  64. Majken K Rasmussen, Esben W Pedersen, Marianne G Petersen, and Kasper Hornbæk. 2012. Shape-changing interfaces: a review of the design space and open research questions. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. 735–744.Google ScholarGoogle ScholarDigital LibraryDigital Library
  65. K Richardson, J Beardall, and JA Raven. 1983. Adaptation of unicellular algae to irradiance: an analysis of strategies. New Phytologist 93, 2 (1983), 157–191.Google ScholarGoogle ScholarCross RefCross Ref
  66. RB Rivkin, HH Seliger, E Swift, and WH Biggley. 1982. Light-shade adaptation by the oceanic dinoflagellates Pyrocystis noctiluca and P. fusiformis. Marine Biology 68, 2 (1982), 181–191.Google ScholarGoogle ScholarCross RefCross Ref
  67. [67] Mark Rober.2013. Retrieved February 2, 2021 from https://www.youtube.com/watch?v=mDmFSz8-r7gGoogle ScholarGoogle Scholar
  68. Ben Salem, Adrian Cheok, and Adria Bassaganyes. 2008. BioMedia for Entertainment. In International Conference on Entertainment Computing. Springer, 232–242.Google ScholarGoogle ScholarDigital LibraryDigital Library
  69. Elena Márquez Segura, Laia Turmo Vidal, and Asreen Rostami. 2016. BODYSTORMING FOR MOVEMENT-BASED INTERACTION DESIGN.Human Technology 12, 2 (2016).Google ScholarGoogle Scholar
  70. Richard Shusterman. 1999. Somaesthetics: A disciplinary proposal. The journal of aesthetics and art criticism 57, 3 (1999), 299–313.Google ScholarGoogle Scholar
  71. Nancy Smith, Shaowen Bardzell, and Jeffrey Bardzell. 2017. Designing for cohabitation: Naturecultures, hybrids, and decentering the human in design. In Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems. 1714–1725.Google ScholarGoogle ScholarDigital LibraryDigital Library
  72. Frances Stracey. 2009. Bio-art: the ethics behind the aesthetics. Nature Reviews Molecular Cell Biology 10, 7 (2009), 496–500.Google ScholarGoogle ScholarCross RefCross Ref
  73. Katsunori Teranishi. 2007. Luminescence of imidazo [1, 2-a] pyrazin-3 (7H)-one compounds. Bioorganic chemistry 35, 1 (2007), 82–111.Google ScholarGoogle Scholar
  74. Bill Verplank. 2003. Interaction design sketchbook. Unpublished paper for CCRMA course Music 250a (2003), 6–10.Google ScholarGoogle Scholar
  75. Linden Vongsathorn, Kenton O’Hara, and Helena M Mentis. 2013. Bodily interaction in the dark. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. 1275–1278.Google ScholarGoogle ScholarDigital LibraryDigital Library
  76. Michelle Westerlaken and Stefano Gualeni. 2016. Becoming with: towards the inclusion of animals as participants in design processes. In Proceedings of the Third International Conference on Animal-Computer Interaction. 1–10.Google ScholarGoogle ScholarDigital LibraryDigital Library
  77. Emil H White, Mark G Steinmetz, Jeffrey D Miano, Peter D Wildes, and Robert Morland. 1980. Chemi-and bioluminescence of firefly luciferin. Journal of the American Chemical Society 102, 9 (1980), 3199–3208.Google ScholarGoogle ScholarCross RefCross Ref
  78. Siouxsie Wiles. 2016. Artists create living paintings from glow-in-the-dark bacteria. Microbiology International(2016). Retrieved February 2, 2021 from https://800ezmicro.com/blog-articles/114-artists-create-living-paintings-from-glow-in-the-dark-bacteria.htmlGoogle ScholarGoogle Scholar
  79. Siouxsie Wiles. 2016. Painting bacteria: art meets glow-in-the-dark microbes. Special Broadcasting Service (SBS) Australia (2016). Retrieved February 2, 2021 from https://www.sbs.com.au/topics/science/nature/article/2016/03/17/painting-bacteria-art-meets-glow-dark-microbesGoogle ScholarGoogle Scholar
  80. Thérèse Wilson and J Woodland Hastings. 1998. Bioluminescence. Annual review of cell and developmental biology 14, 1 (1998), 197–230.Google ScholarGoogle Scholar
  81. Lining Yao, Jifei Ou, Chin-Yi Cheng, Helene Steiner, Wen Wang, Guanyun Wang, and Hiroshi Ishii. 2015. bioLogic: Natto cells as nanoactuators for shape changing interfaces. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems. 1–10.Google ScholarGoogle ScholarDigital LibraryDigital Library
  82. Bin Yu, Jun Hu, Mathias Funk, and Loe Feijs. 2018. DeLight: biofeedback through ambient light for stress intervention and relaxation assistance. Personal and Ubiquitous Computing 22, 4 (2018), 787–805.Google ScholarGoogle ScholarCross RefCross Ref
  83. Chi Zhang, Josh Tabor, Jialiang Zhang, and Xinyu Zhang. 2015. Extending mobile interaction through near-field visible light sensing. In Proceedings of the 21st Annual International Conference on Mobile Computing and Networking. 345–357.Google ScholarGoogle ScholarDigital LibraryDigital Library

Recommendations

Comments

Login options

Check if you have access through your login credentials or your institution to get full access on this article.

Sign in
  • Published in

    cover image ACM Conferences
    DIS '21: Proceedings of the 2021 ACM Designing Interactive Systems Conference
    June 2021
    2082 pages
    ISBN:9781450384766
    DOI:10.1145/3461778

    Copyright © 2021 ACM

    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

    Publisher

    Association for Computing Machinery

    New York, NY, United States

    Publication History

    • Published: 28 June 2021

    Permissions

    Request permissions about this article.

    Request Permissions

    Check for updates

    Qualifiers

    • research-article
    • Research
    • Refereed limited

    Acceptance Rates

    Overall Acceptance Rate1,158of4,684submissions,25%

    Upcoming Conference

    DIS '24
    Designing Interactive Systems Conference
    July 1 - 5, 2024
    IT University of Copenhagen , Denmark

PDF Format

View or Download as a PDF file.

PDF

eReader

View online with eReader.

eReader

HTML Format

View this article in HTML Format .

View HTML Format