Tuesday, November 15, 2016

[Paper Review #8 15/11/16] SCI-FI: Shape-Changing Interfaces, Future Interactions

SCI-FI: Shape-Changing Interfaces, Future Interactions

Giovanni Maria Troiano, John Tiab, Youn-Kyung Lim, NordiCHI '16


This paper reviews 340 Sci-Fi movies to identify shape-changing instances and understand their behavioral patterns. Among 240 movies, 61 movies contain 101 shape-changing instances in total. Two authors analyze the instances using affinity diagram, inspired by thematic analysis [1]. They reveal behavioral patterns and functionalities as follows (The higher classification is called pattern, and the lower classification is called functionality):

  1. "Reconfiguration expresses the capacity of a SCI to change in formation or to reconfigure its structure."
    1. Assembling / Disassembling
    2. Reshaping Environments
    3. Revealing Interactive Parts
  2. "Transformation expresses the capacity of a SCI to change in form and in appearance."
    1. Camouflage
    2. Morphing
  3. "Adaptation expresses the capacity of SCI to adjust their shape, so as to fulfill users' needs or adapt to specific situations."
    1. Finding the Intended Shape
    2. Expanding
    3. Reversing Shape
  4. "Physicalization expresses the capacity of a SCI of extruding shapes from its surface to physicalize digital information or to ultimately generate physical matter."
    1. Representation
    2. Materialization

Method and Tools

  1. code shape-changing instances in the movies [coded data]
  2. cross check if there are missed instances by fast playing movies (with Chrome Video Speed Controller plug-in and PotPlayer)
  3. make affinity diagram (Mural.ly). The authors go through 5 iterations, and it took 2~3 weeks

What I like

  • The paper is very well structured and easy to read.
  • The method has academic background, and took enough time and iteraction
  • The figures well help understand what they explain in the text.


  • What was the tool to code video?
  • Number of instances per pattern and functionality
  • I think this paper can extend Joelle Coutaz's plasticity definition, especially its purposes: to fit into environment; to fit to users; to fit the task performed.

Further to read

1. Soegaard, M. and Dam, R.F. 2011. Semi-structured Qualitative Studies. In The Encyclopedia of Human- Computer Interaction (2nd Ed.). The Interaction Design Fundation.

Monday, November 7, 2016

[Paper Review #7 07/11/16] 3D Printing Pneumatic Device Controls with Variable Activation Force Capabilities

3D Printing Pneumatic Device Controls with Variable Activation Force Capabilities

Marynel Vázquez, Eric Brockmeyer, Ruta Desai, Chris Harrison, Scott E. Hudson, CHI '15


The paper demonstrates a fabrication method to provide variable activation force capabilities on 3D printed pneumatic controls. It well illustrates capabilities and limitations of 3D printed pneumatic controls. For example, the 3D printing allows fast implementation, but it is tricky to reduce support material from soft material. The paper implies that the authors tried various methods to shorten the procedure, make the structure robust to more air pressure, and ease the implementation for other researchers. The figures clearly illustrate the design and implementation of controls. Plus, the detailed information about the hardware invites the readers to investigate pneumatic interfaces further.


  • Hardware configuration: AIRPO pump (D20288), manual pressure regulator by Airtrol, SMC valves (S070C), silicon microstructures pressure sensor (SM5651), gauge, arduino. the pressure regulator and the gauge are no necessary for operating our controls, but were added for safety.
  • 3D printer: Objet Eden260V with resolution of 600dpi (42 microns)
  • 3D printer materials for the printer: http://www.stratasys.com/materials/
  • National pipe thread standard


  • Alligator toy
  • Responsive lamp
  • Volume knob: the knob increases friction when it is rotated clockwise beyond its middle position, to keep the volume levels in a safe range.
  • Side scrolling video game: the slider has more friction when the flight goes through clouds.
  • Radio tuner: the knob gives more frictions when users reach a station.

Expression I like

  • for illustrative purposes,
  • closed-loop (cf., open-loop)
  • off-the-shelf sensors (commercially available sensors)


  • I wonder if the dynamic pressure profiles (figure 5) will be distinguishable by users.

Further to read

  • Clark, L. How hair gel enables freeform 3d printing with an undo function. Wired.co.uk, July 2013. http://www.wired.co.uk/news/archive/2013-07/25/ undo-3d-printing.
  • Malone, E., and Lipson, H. Multi-material freeform fabrication of active systems. In Proc. ESDA'08 (2008).
  • Slyper, R., and Hodgins, J. Prototyping robot appearance, movement, and interactions using flexible 3d printing and air pressure sensors. In Proc. RO-MAN'12 (2012).

Wednesday, November 2, 2016

Digital Gastronomy

paper: http://dl.acm.org/citation.cfm?id=2984528

website: http://digitalgastronomy.co/

When I saw MIT's inflated food, I didn't expect technologies can be used for our daily food. After watching this work, I'm truly convinced that those technologies will be used in fancy restaurants. (It may be happening already!) Considering molecular cooking is actively investigated, I believe the authors' vision is feasible. I'd like to taste the food that they demonstrated!