Wearable Human-Machine Interface Developed at KAIST in South Korea Quantitatively Measures Goose Bumps -- a Step Toward Direct Detection of Human Emotional States
Can emotional states be measured quantitatively, and if so what would advertising, manufacturing and social media companies do with that data? Imagine a world in which a consumer's real-time physical and emotional response helped to determine his/her experience of music, online ads or the temperature in the room.
That may not be so far away -- a team of researchers at KAIST in Daejeon, South Korea has developed a flexible, wearable 20mm x 20mm polymer sensor that can directly measure the degree and occurrence on the skin of goose bumps (technically known as "piloerection"), which is caused by sudden changes in body temperature or emotional states.
Described this week in the journal Applied Physics Letters, from AIP Publishing, the technology is based on an electronic device known as a coplanar capacitor and detects goose bumps by virtue of a simple, linear relation between the deformation of the sensor and the decrease of the capacitance.
“We found that the height of the goose bump and the piloerection duration can be deduced by analyzing obtained capacitance change trace,” explained Young-Ho Cho.
While more work still needs to be done to correlate such physical measurements with emotional states, the work suggests that quantitatively monitoring goose bumps in real-time as an indicator of human physical or emotional status is possible, which could pave the way for personalized advertising, music streams or other services informed by directly access to the emotions of the end user.
"In the future, human emotions will be regarded like any typical biometric information, including body temperature or blood pressure," Cho said.
How the Device was Made
Through use of microfabrication technology, Cho and colleagues built the sensor using a conductive polymer called PEDOT:PSS for the capacitors, which is flexibile compared to brittle metallic conductive materials. The capacitors were embedded in a silicon substrate via a multi-step spin-coating process, giving them a spiral shape and coplanar structure. This gave them high capacitive density and high deformability while remaining only 1.2 micrometers thick.
The silicon substrate, known as Ecoflex 0030, was selected due to its biocompatibility and high degree of flexibility relative to human skin. It is also highly thermal and photo-stability, which allows the embedded polymer devices to maintain their performance in diverse conditions.
They attached these sensors to the inside of a 28-year old subject’s dorsal forearm and had him grab ahold of ide cubes to induce a sudden cold shock. This stimulated piloerection, deforming the sensors and causing their capacitance to notably decrease.
Future work includes scaling down the signal processing module and capacitance measurement system to be co-mounted on skin with the sensor.
The article "A Flexible Skin Piloerection Monitoring Sensor" by Jaemin Kim, Dae Geon Seo, and Young-Ho Cho will be published in the journal Applied Physics Letters on June 24, 2014 (DOI: 10.1063/1.4881888). After that date, it can be accessed at: http://scitation.aip.org/content/aip/journal/apl/104/25/10.1063/1.4881888
ABOUT THE JOURNAL
Applied Physics Letters features concise, rapid reports on significant new findings in applied physics. The journal covers new experimental and theoretical research on applications of physics phenomena related to all branches of science, engineering, and modern technology. See: http://apl.aip.org
Jason Socrates Bardi | newswise
Merging galaxies break radio silence
28.05.2015 | ESA/Hubble Information Centre
New Technique Speeds NanoMRI Imaging
28.05.2015 | American Institute of Physics (AIP)
Using ultrashort laser pulses, scientists in Max Planck Institute of Quantum Optics have demonstrated the emission of extreme ultraviolet radiation from thin dielectric films and have investigated the underlying mechanisms.
In 1961, only shortly after the invention of the first laser, scientists exposed silicon dioxide crystals (also known as quartz) to an intense ruby laser to...
The only professorship in Germany to date, one master's programme, one laboratory with worldwide unique equipment and the corresponding research results: The University of Würzburg is leading in the field of biofabrication.
Paul Dalton is presently the only professor of biofabrication in Germany. About a year ago, the Australian researcher relocated to the Würzburg department for...
Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.
Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...
Development and implementation of an advanced automobile parking navigation platform for parking services
To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...
The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...
20.05.2015 | Event News
18.05.2015 | Event News
12.05.2015 | Event News
28.05.2015 | Press release
28.05.2015 | Physics and Astronomy
28.05.2015 | Information Technology