Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
skip to main content
10.1145/3473856.3473861acmotherconferencesArticle/Chapter ViewAbstractPublication PagesmundcConference Proceedingsconference-collections
research-article

Less is more! Support of Parallel and Time-critical Assembly Tasks with Augmented Reality

Published: 13 September 2021 Publication History

Abstract

Manual assembly tasks require workers to precisely assemble parts in 3D space in parallel steps. Often, additional time pressure further increases the complexity of these parallel tasks (e.g. in adhesive bonding processes). The performance in parallel tasks is heavily influenced by the capacity of the working memory, which is often overwhelmed if rules and states of too many tasks have to be remembered or perceived. Therefore, we propose to use Augmented Reality (AR) to investigate how visual assistance with parallel tasks can affect worker performance in time and spatial dependent process steps. In a user study, we compare three conditions: AR instructions presented (a) One task, (b) Two tasks, and (c) Four tasks per step on a tablet. For instructions we used selected work steps from a standardized adhesive bonding process as a representative for common time-critical assembly tasks. Our results show that instructions with multiple displayed tasks simultaneously per step can improve the process time but also increase the error rate and task load. The work instructions with less displayed tasks per work step showed better subjective results among participants, which may increase motivation, especially among less experienced workers. Our results help designers and developers to design assistance systems for time-critical and simultaneously executable assembly tasks, while considering process times, error rate and task load.

References

[1]
DIN 2304-1:2020-04. 2020. Adhesive bonding technology - Quality requirements for adhesive bonding processes - Part 1: Adhesive bonding process chain. https://doi.org/10.31030/3138880
[2]
J. Alves, B. Marques, M. Oliveira, T. Araújo, P. Dias, and B. S. Santos. 2019. Comparing Spatial and Mobile Augmented Reality for Guiding Assembling Procedures with Task Validation. In 2019 IEEE International Conference on Autonomous Robot Systems and Competitions (ICARSC). IEEE, 1–6. https://doi.org/10.1109/ICARSC.2019.8733642
[3]
Ronald T. Azuma. 1997. A Survey of Augmented Reality. Presence: Teleoperators and Virtual Environments 6, 4(1997), 355–385. https://doi.org/10.1162/pres.1997.6.4.355 arXiv:https://doi.org/10.1162/pres.1997.6.4.355
[4]
Michiel Bal, Jos Benders, Steven Dhondt, and Lander Vermeerbergen. 2021. Head-worn displays and job content: A systematic literature review. Applied Ergonomics 91(2021), 103285. https://doi.org/10.1016/j.apergo.2020.103285
[5]
Anne S. Berry, Theodore P. Zanto, Aaron M. Rutman, Wesley C. Clapp, and Adam Gazzaley. 2009. Practice-Related Improvement in Working Memory is Modulated by Changes in Processing External Interference. Journal of Neurophysiology 102, 3 (2009), 1779–1789. https://doi.org/10.1152/jn.00179.2009 arXiv:https://doi.org/10.1152/jn.00179.2009PMID: 19587320.
[6]
B. Besbes, S. N. Collette, M. Tamaazousti, S. Bourgeois, and V. Gay-Bellile. 2012. An interactive Augmented Reality system: A prototype for industrial maintenance training applications. In 2012 IEEE International Symposium on Mixed and Augmented Reality (ISMAR). IEEE Computer Society, 269–270.
[7]
Bhaskar Bhattacharya and Eliot H. Winer. 2019. Augmented reality via expert demonstration authoring (AREDA). Computers in Industry 105 (2019), 61 – 79. https://doi.org/10.1016/j.compind.2018.04.021
[8]
Jonas Blattgerste, Benjamin Strenge, Patrick Renner, Thies Pfeiffer, and Kai Essig. 2017. Comparing Conventional and Augmented Reality Instructions for Manual Assembly Tasks. In Proceedings of the 10th International Conference on PErvasive Technologies Related to Assistive Environments (Island of Rhodes, Greece) (PETRA ’17). Association for Computing Machinery, New York, NY, USA, 75–82. https://doi.org/10.1145/3056540.3056547
[9]
Eleonora Bottani and Giuseppe Vignali. 2019. Augmented reality technology in the manufacturing industry: A review of the last decade. IISE Transactions 51, 3 (2019), 284–310. https://doi.org/10.1080/24725854.2018.1493244 arXiv:https://doi.org/10.1080/24725854.2018.1493244
[10]
Anna Brolin, Peter Thorvald, and Keith Case. 2017. Experimental study of cognitive aspects affecting human performance in manual assembly. Production & Manufacturing Research 5, 1 (2017), 141–163. https://doi.org/10.1080/21693277.2017.1374893 arXiv:https://doi.org/10.1080/21693277.2017.1374893
[11]
John Brooke 1996. SUS-A quick and dirty usability scale. Usability evaluation in industry 189, 194 (1996), 4–7.
[12]
Benjamin J. Dixon, Michael J. Daly, Harley Chan, Allan D. Vescan, Ian J. Witterick, and Jonathan C. Irish. 2013. Surgeons blinded by enhanced navigation: the effect of augmented reality on attention. Surgical Endoscopy 27(2013), 454–461. https://doi.org/10.1007/s00464-012-2457-3
[13]
John Duncan. 1979. Divided attention: The whole is more than the sum of its parts.Journal of Experimental Psychology: Human Perception and Performance 5, 2(1979), 216.
[14]
A. Elliot, M. Maier, A. Moller, R. Friedman, and J. Meinhardt. 2007. Color and psychological functioning: The effect of red on performance attainment. Journal of experimental psychology. General 136 (03 2007), 154–68. https://doi.org/10.1037/0096-3445.136.1.154
[15]
Rico Fischer, Jeff Miller, and Torsten Schubert. 2007. Evidence for parallel semantic memory retrieval in dual tasks. Memory & Cognition 35, 7 (01 Oct 2007), 1685–1699. https://doi.org/10.3758/BF03193502
[16]
Rico Fischer and Franziska Plessow. 2015. Efficient multitasking: parallel versus serial processing of multiple tasks. Frontiers in Psychology 6 (2015), 1366. https://doi.org/10.3389/fpsyg.2015.01366
[17]
Markus Funk, Thomas Kosch, and Albrecht Schmidt. 2016. Interactive Worker Assistance: Comparing the Effects of in-Situ Projection, Head-Mounted Displays, Tablet, and Paper Instructions. In Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing(Heidelberg, Germany) (UbiComp ’16). Association for Computing Machinery, New York, NY, USA, 934–939. https://doi.org/10.1145/2971648.2971706
[18]
G. Habenicht. 2009. Kleben - erfolgreich und fehlerfrei: Handwerk, Praktiker, Ausbildung, Industrie. Vieweg+Teubner Verlag, Wiesbaden, Germany. https://books.google.de/books?id=BskNkFjqDJsC
[19]
Sandra G. Hart. 2006. Nasa-Task Load Index (NASA-TLX); 20 Years Later. Proceedings of the Human Factors and Ergonomics Society Annual Meeting 50, 9(2006), 904–908. https://doi.org/10.1177/154193120605000909 arXiv:https://doi.org/10.1177/154193120605000909
[20]
Bernhard Hommel. 1998. Automatic Stimulus-Response Translation in Dual-Task Performance. Journal of experimental psychology. Human perception and performance 24 (11 1998), 1368–84. https://doi.org/10.1037//0096-1523.24.5.1368
[21]
Melynda Hoover. 2018. An evaluation of the Microsoft HoloLens for a manufacturing-guided assembly task. Master’s thesis. Iowa State University. https://doi.org/10.31274/etd-180810-6008
[22]
Lei Hou, Xiangyu Wang, and Martijn Truijens. 2015. Using Augmented Reality to Facilitate Piping Assembly: An Experiment-Based Evaluation. Journal of Computing in Civil Engineering 29, 1 (2015), 05014007. https://doi.org/10.1061/(ASCE)CP.1943-5487.0000344 arXiv:https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%29CP.1943-5487.0000344
[23]
Jannike Illing, Philipp Klinke, Uwe Grünefeld, Max Pfingsthorn, and Wilko Heuten. 2020. Time is Money! Evaluating Augmented Reality Instructions for Time-Critical Assembly Tasks. Association for Computing Machinery, New York, NY, USA, 277–287. https://doi.org/10.1145/3428361.3428398
[24]
Yuhong Jiang, Rebecca Saxe, and Nancy Kanwisher. 2004. Functional Magnetic Resonance Imaging Provides New Constraints on Theories of the Psychological Refractory Period. Psychological Science 15, 6 (2004), 390–396. https://doi.org/10.1111/j.0956-7976.2004.00690.x arXiv:https://doi.org/10.1111/j.0956-7976.2004.00690.xPMID: 15147492.
[25]
S. Julier, M. Lanzagorta, Y. Baillot, L. Rosenblum, S. Feiner, T. Hollerer, and S. Sestito. 2000. Information filtering for mobile augmented reality. In Proceedings IEEE and ACM International Symposium on Augmented Reality (ISAR 2000) (Munich, Germany). IEEE Computer Society, 3–11. https://doi.org/10.1109/ISAR.2000.880917
[26]
Daniel Kahneman. 1973. Attention and effort. Prentice-Hall, Hoboken, NJ.
[27]
Jens Keil, Florian Schmitt, Timo Engelke, Holger Graf, and Manuel Olbrich. 2018. Augmented Reality Views: Discussing the Utility of Visual Elements by Mediation Means in Industrial AR from a Design Perspective. In Virtual, Augmented and Mixed Reality: Applications in Health, Cultural Heritage, and Industry, Jessie Y.C. Chen and Gino Fragomeni (Eds.). Springer International Publishing, Cham, 298–312.
[28]
Jens Keil, Michael Zoellner, Timo Engelke, Folker Wientapper, and Michael Schmitt. 2013. Controlling and Filtering Information Density with Spatial Interaction Techniques via Handheld Augmented Reality. In Virtual Augmented and Mixed Reality. Designing and Developing Augmented and Virtual Environments, Randall Shumaker (Ed.). Springer Berlin Heidelberg, Berlin, Heidelberg, 49–57.
[29]
Bui Minh Khuong, Kiyoshi Kiyokawa, Andrew Miller, Joseph J. La Viola, Tomohiro Mashita, and Haruo Takemura. 2014. The effectiveness of an AR-based context-aware assembly support system in object assembly. In 2014 IEEE Virtual Reality, VR 2014 - Proceedings(Minneapolis, MN) (Proceedings - IEEE Virtual Reality). IEEE Computer Society, 57–62. https://doi.org/10.1109/VR.2014.6802051 21st IEEE Virtual Reality Conference, VR 2014 ; Conference date: 29-03-2014 Through 02-04-2014.
[30]
Stuart T. Klapp, Dana Maslovat, and Richard J. Jagacinski. 2019. The bottleneck of the psychological refractory period effect involves timing of response initiation rather than response selection. Psychonomic Bulletin & Review 26, 1 (01 Feb 2019), 29–47. https://doi.org/10.3758/s13423-018-1498-6
[31]
Iring Koch, Edita Poljac, Hermann Müller, and Andrea Kiesel. 2018. Cognitive Structure, Flexibility, and Plasticity in Human Multitasking-An Integrative Review of Dual-Task and Task-Switching Research. Psychological Bulletin 144 (03 2018). https://doi.org/10.1037/bul0000144
[32]
Iring Koch and Wolfgang Prinz. 2002. Process interference and code overlap in dual-task performance.Journal of Experimental Psychology: Human Perception and Performance 28, 1(2002), 192. https://doi.org/10.1037/0096-1523.28.1.192
[33]
Carola Lehle and Ronald Hübner. 2008. Strategic capacity sharing between two tasks: evidence from tasks with the same and with different task sets. Psychological Research PRPF 73, 5 (08 Oct 2008), 707. https://doi.org/10.1007/s00426-008-0162-6
[34]
Wang Li, Junfeng Wang, Sichen Jiao, Meng Wang, and Shiqi Li. 2019. Research on the visual elements of augmented reality assembly processes. Virtual Reality & Intelligent Hardware 1, 6 (2019), 622 – 634. https://doi.org/10.1016/j.vrih.2019.09.006
[35]
Gordon D Logan and Matthew D Schulkind. 2000. Parallel memory retrieval in dual-task situations: I. Semantic memory.Journal of Experimental Psychology: Human Perception and Performance 26, 3(2000), 1072. https://doi.org/10.1037/0096-1523.26.3.1072
[36]
Anastacia MacAllister, Melynda Hoover, Stephen B Gilbert, James H. Oliver, Rafael Radkowski, Timothy Garrett, Joseph Holub, Eliot Winer, Scott Terry, and Paul Davies. 2017. Comparing Visual Assembly Aids for Augmented Reality Work Instructions. In Proceedings of the 2017 Interservice/Industry Training, Simulation, and Education Conference (I/ITSEC). National Training and Simulation Association, Arlington, VA, 17208.
[37]
George A. Miller. 1956. The magical number seven, plus or minus two: some limits on our capacity for processing information.Psychological Review 63, 2 (1956), 81–97. https://doi.org/10.1037/h0043158
[38]
Jeff Miller. 2005. Backward crosstalk effects in psychological refractory period paradigms: effects of second-task response types on first-task response latencies. Psychological Research 70, 6 (20 Oct 2005), 484. https://doi.org/10.1007/s00426-005-0011-9
[39]
David Navon and Jeff Miller. 1987. Role of outcome conflict in dual-task interference.Journal of Experimental Psychology: Human Perception and Performance 13, 3(1987), 435. https://doi.org/10.1037/0096-1523.13.3.435
[40]
David Navon and Jeff Miller. 2002. Queuing or sharing? A critical evaluation of the single-bottleneck notion. Cognitive psychology 44, 3 (2002), 193–251. https://doi.org/10.1006/cogp.2001.0767
[41]
Donald A Norman and Daniel G Bobrow. 1975. On data-limited and resource-limited processes. Cognitive Psychology 7, 1 (1975), 44–64. https://doi.org/10.1016/0010-0285(75)90004-3
[42]
Harold Pashler. 1994. Dual-task interference in simple tasks: data and theory.Psychological bulletin 116, 2 (1994), 220.
[43]
Harold E Pashler. 1999. The psychology of attention. MIT press, Cambridge, MA.
[44]
N. Pathomaree and S. Charoenseang. 2005. Augmented reality for skill transfer in assembly task. In ROMAN 2005. IEEE International Workshop on Robot and Human Interactive Communication, 2005. (Nashville, TN, USA). IEEE, 500–504. https://doi.org/10.1109/ROMAN.2005.1513829
[45]
Carole Plasson, Dominique Cunin, Yann Laurillau, and Laurence Nigay. 2019. Tabletop AR with HMD and Tablet: A Comparative Study for 3D Selection. In Proceedings of the 2019 ACM International Conference on Interactive Surfaces and Spaces (Daejeon, Republic of Korea) (ISS ’19). Association for Computing Machinery, New York, NY, USA, 409–414. https://doi.org/10.1145/3343055.3360760
[46]
Edita Poljac, Andrea Kiesel, Iring Koch, and Hermann Müller. 2018. New perspectives on human multitasking. Psychological Research 82, 1 (01 Jan 2018), 1–3. https://doi.org/10.1007/s00426-018-0970-2
[47]
Edita Poljac, Iring Koch, and Harold Bekkering. 2009. Dissociating restart cost and mixing cost in task switching. Psychological Research PRPF 73, 3 (01 May 2009), 407–416. https://doi.org/10.1007/s00426-008-0151-9
[48]
K. Pravossoudovitch, F. Cury, S. G. Young, and A. J. Elliot. 2014. Is red the colour of danger? Testing an implicit red–danger association. Ergonomics 57, 4 (2014), 503–510. https://doi.org/10.1080/00140139.2014.889220 arXiv:https://doi.org/10.1080/00140139.2014.889220PMID: 24588355.
[49]
Rafael Radkowski, Jordan Herrema, and James Oliver. 2015. Augmented Reality-Based Manual Assembly Support With Visual Features for Different Degrees of Difficulty. International Journal of Human–Computer Interaction 31, 5(2015), 337–349. https://doi.org/10.1080/10447318.2014.994194 arXiv:https://doi.org/10.1080/10447318.2014.994194
[50]
P. Renner and T. Pfeiffer. 2017. Attention guiding techniques using peripheral vision and eye tracking for feedback in augmented-reality-based assistance systems. In 2017 IEEE Symposium on 3D User Interfaces (3DUI). IEEE Computer Society, 186–194. https://doi.org/10.1109/3DUI.2017.7893338
[51]
Eric Rose, David Breen, Klaus H. Ahlers, Chris Crampton, Mihran Tuceryan, Ross Whitaker, and Douglas Greer. 1995. 25 - Annotating Real-World Objects Using Augmented Reality. In Computer Graphics, Rae Earnshaw and John Vince (Eds.). Academic Press, Boston, 357 – 370. https://doi.org/10.1016/B978-0-12-227741-2.50029-3
[52]
Orit Rubin and Nachshon Meiran. 2005. On the Origins of the Task Mixing Cost in the Cuing Task-Switching Paradigm.Journal of experimental psychology. Learning, memory, and cognition 31 (12 2005), 1477–91. https://doi.org/10.1037/0278-7393.31.6.1477
[53]
Dario D Salvucci and Niels A Taatgen. 2008. Threaded cognition: An integrated theory of concurrent multitasking.Psychological review 115, 1 (2008), 101. https://doi.org/10.1037/0033-295X.115.1.101
[54]
Sule Serubugo, Denisa Skantarova, Lasse Kjærsgård Nielsen, and Martin Kraus. 2017. Comparison of Wearable Optical See-through and Handheld Devices as Platform for an Augmented Reality Museum Guide. Proceedings of the 12th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications 1 (2017), 179–186. https://doi.org/10.5220/0006093901790186
[55]
Mariano Sigman and Stanislas Dehaene. 2006. Dynamics of the Central Bottleneck: Dual-Task and Task Uncertainty. PLOS Biology 4, 7 (06 2006). https://doi.org/10.1371/journal.pbio.0040220
[56]
Anna Syberfeldt, Magnus Holm, Oscar Danielsson, Lihui Wang, and Rodney Lindgren Brewster. 2016. Support Systems on the Industrial Shop-floors of the Future – Operators’ Perspective on Augmented Reality. Procedia CIRP 44(2016), 108 – 113. https://doi.org/10.1016/j.procir.2016.02.017 6th CIRP Conference on Assembly Technologies and Systems (CATS).
[57]
Arthur Tang, Charles Owen, Frank Biocca, and Weimin Mou. 2003. Comparative Effectiveness of Augmented Reality in Object Assembly. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (Ft. Lauderdale, Florida, USA) (CHI ’03). Association for Computing Machinery, New York, NY, USA, 73–80. https://doi.org/10.1145/642611.642626
[58]
Mike Tombu and Pierre Jolicoeur. 2003. A Central Capacity Sharing Model of Dual-Task Performance. Journal of experimental psychology. Human perception and performance 29 (03 2003), 3–18. https://doi.org/10.1037//0096-1523.29.1.3
[59]
Alan T Welford. 1952. The psychological refractory period and the timing of high-speed performance-a review and a theory. British Journal of Psychology 43, 1 (1952), 2.
[60]
Christopher D Wickens. 1984. Processing resources in attention/R. Parazuman, DR Davis (Eds.). Varieties of Attention.
[61]
Christopher D. Wickens. 2002. Multiple resources and performance prediction. Theoretical Issues in Ergonomics Science 3, 2 (2002), 159–177. https://doi.org/10.1080/14639220210123806 arXiv:https://doi.org/10.1080/14639220210123806
[62]
Theodore P. Zanto and Adam Gazzaley. 2009. Neural Suppression of Irrelevant Information Underlies Optimal Working Memory Performance. Journal of Neuroscience 29, 10 (2009), 3059–3066. https://doi.org/10.1523/JNEUROSCI.4621-08.2009 arXiv:https://www.jneurosci.org/content/29/10/3059.full.pdf
[63]
Xianjun Sam Zheng, Cedric Foucault, Patrik Matos da Silva, Siddharth Dasari, Tao Yang, and Stuart Goose. 2015. Eye-Wearable Technology for Machine Maintenance: Effects of Display Position and Hands-Free Operation. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (Seoul, Republic of Korea) (CHI ’15). Association for Computing Machinery, New York, NY, USA, 2125–2134. https://doi.org/10.1145/2702123.2702305
[64]
Feng Zhou, Henry Been-Lirn Duh, and Mark Billinghurst. 2008. Trends in Augmented Reality Tracking, Interaction and Display: A Review of Ten Years of ISMAR. In Proceedings of the 7th IEEE/ACM International Symposium on Mixed and Augmented Reality(ISMAR ’08). IEEE Computer Society, Washington, DC, USA, 193–202. https://doi.org/10.1109/ISMAR.2008.4637362

Cited By

View all
  • (2024)Keep Track! Supporting Spatial Tasks with Augmented Reality OverviewsProceedings of the 2024 ACM Symposium on Spatial User Interaction10.1145/3677386.3682093(1-11)Online publication date: 7-Oct-2024
  • (2024)Positive and Negative Reinforcement Nudges for Human-Robot Collaboration using a Mixed Reality InterfaceProceedings of the European Conference on Cognitive Ergonomics 202410.1145/3673805.3673844(1-4)Online publication date: 8-Oct-2024
  • (2024)Unlocking Augmented Reality Learning Design Based on Evidence From Empirical Cognitive Load Studies—A Systematic Literature ReviewJournal of Computer Assisted Learning10.1111/jcal.1309541:1Online publication date: 2-Dec-2024
  • Show More Cited By

Recommendations

Comments

Information & Contributors

Information

Published In

cover image ACM Other conferences
MuC '21: Proceedings of Mensch und Computer 2021
September 2021
613 pages
ISBN:9781450386456
DOI:10.1145/3473856
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 the author(s) 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: 13 September 2021

Permissions

Request permissions for this article.

Check for updates

Author Tags

  1. augmented reality
  2. computer-aided manufacturing
  3. multitasking
  4. situational awareness
  5. time criticality
  6. user study
  7. worker support

Qualifiers

  • Research-article
  • Research
  • Refereed limited

Conference

MuC '21
MuC '21: Mensch und Computer 2021
September 5 - 8, 2021
Ingolstadt, Germany

Contributors

Other Metrics

Bibliometrics & Citations

Bibliometrics

Article Metrics

  • Downloads (Last 12 months)50
  • Downloads (Last 6 weeks)9
Reflects downloads up to 13 Jan 2025

Other Metrics

Citations

Cited By

View all
  • (2024)Keep Track! Supporting Spatial Tasks with Augmented Reality OverviewsProceedings of the 2024 ACM Symposium on Spatial User Interaction10.1145/3677386.3682093(1-11)Online publication date: 7-Oct-2024
  • (2024)Positive and Negative Reinforcement Nudges for Human-Robot Collaboration using a Mixed Reality InterfaceProceedings of the European Conference on Cognitive Ergonomics 202410.1145/3673805.3673844(1-4)Online publication date: 8-Oct-2024
  • (2024)Unlocking Augmented Reality Learning Design Based on Evidence From Empirical Cognitive Load Studies—A Systematic Literature ReviewJournal of Computer Assisted Learning10.1111/jcal.1309541:1Online publication date: 2-Dec-2024
  • (2024)Taxonomy of performance shaping factors in manufacturing: A systematic literature reviewHuman Factors and Ergonomics in Manufacturing & Service Industries10.1002/hfm.2103634:5(367-385)Online publication date: 13-May-2024
  • (2023)Manual Assembly Augmented Reality Systems Implementation: A Systematic Literature MappingProceedings of the 25th Symposium on Virtual and Augmented Reality10.1145/3625008.3625011(17-25)Online publication date: 6-Nov-2023
  • (2022)Adaptive Visual Cues for Guiding a Bimanual Unordered Task in Virtual Reality2022 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)10.1109/ISMAR55827.2022.00059(431-440)Online publication date: Oct-2022

View Options

Login options

View options

PDF

View or Download as a PDF file.

PDF

eReader

View online with eReader.

eReader

HTML Format

View this article in HTML Format.

HTML Format

Media

Figures

Other

Tables

Share

Share

Share this Publication link

Share on social media