A fractal approach is employed for the brain motor imagery recognition and applied to brain computer interface (BCI).
The fractal dimension is used as feature extraction and SVM (Support Vector Machine) as feature classifier for on-line
BCI applications. The modified Inverse Random Midpoint Displacement (mIRMD) is adopted to calculate the fractal
dimensions of EEG signals. The fractal dimensions can effectively reflect the complexity of EEG signals, and are related
to the motor imagery tasks. Further, the SVM is employed as the classifier to combine with fractal dimension for
motor-imagery recognition and use mutual information to show the difference between two classes. The results are
compared with those in the BCI 2003 competition and it shows that our method has better classification accuracy and
mutual information (MI).
A novel optoelectrofulidic system integrated optical image concentration and alignment system, dielectrophoresis
phenomenon, microfluidic and friendly real-time control interface is first reported in this article. A new application of
photoconductive material oxotitanium phthalocyanine (TiOPc) for microparticle applying has been first described and
demonstrated by our research group. Basis on the special character of the photoconductive material, a TiOPc-based
optoelectronic tweezers (Ti-OET) is utilized for single and massive cells/particles manipulation. The objects wanted to
be manipulated are defined with different behaviors (e.g., press, release, drag and move) using Flash® software when the
cursor acts on them. It also reveals the application for biological application to form the cells trapping with three sorts of
cells, HMEC-1, HepG2 and HEK293t.
Another application of our optoelectrofulidic system is to fabricate a TiOPc-based flow cytometry chip which can be
used for sorting the 15μm diameter particles with 105 μm/s velocity. When the 10Vp.p. voltage and 45 kHz AC
frequency apply on the top and button ITO electrode, the illuminated light pattern will become a spatially virtual switch
inside the microchannel. The dielectrophoresis force between top ITO glass and button photoconductive layer controlled
by the friendly interface will concentrate the cells/particles as a straight line and individually direct each one in different
paths.
In summary, we have established an optoelectronfulidic-based chip and spatially virtual switch system which are applied
for cell pattern and particles sorting. In the future, this easy manipulation approach can place the full power of
optoelectronfulidic chip into the biological operators' hands.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.