[Eeglablist] eeglablist Digest, Vol 45, Issue 11

Murugappan M m.murugappan at gmail.com
Thu Jul 31 21:08:24 PDT 2008


Dear Friends,

I am currently working on Human Emotion Recognition using EEG. i am using
Audio-Visual Induction based
protocol for evoking the emotions. i have tried in the website for getting
the universal standard video clips for
inducing emotions, i am tried to succeed much. Also, i cant find any short
time duration video clips for inducing
Anger and sad emotions. In addition, i want to if any standard data base is
available for the emotion recognition
experiemtn. If any one knows about the details means, can you pl forward to
me.

Thanks in advance,

Regards,

M Murugappan,
Research Scholar,
Universiti Malaysia Perlis (UniMAP),
Perlis, Malaysia.
E-Mail: m.murugappn at gmail.com
Phone: +6-04-9798686



On Thu, Jul 31, 2008 at 3:00 AM, <eeglablist-request at sccn.ucsd.edu> wrote:

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> Today's Topics:
>
>   1. post-doctoral position (Ferris, Daniel)
>   2. Pros & cons of Butterworth filter order (Wambua Kazi)
>   3. rereferencing and epochs (Skotara)
>   4. ICA weights blowing up (Alana Firl)
>
>
> ---------- Forwarded message ----------
> From: "Ferris, Daniel" <ferrisdp at umich.edu>
> To: "eeglablist at sccn.ucsd.edu" <eeglablist at sccn.ucsd.edu>
> Date: Mon, 28 Jul 2008 22:13:04 -0400
> Subject: [Eeglablist] post-doctoral position
>
> Post-Doctoral Research Position in Brain Dynamics During Human Locomotion
>
> University of Michigan
>
>
>
> A post-doctoral research position is available in the Human Neuromechanics
> Laboratory to study brain dynamics during human locomotion using high
> density EEG. The research will involve studying brain dynamics in both
> healthy and spinal cord injured humans with simultaneous full body
> biomechanical analyses (kinematics, kinetics, EMG). The projects include
> collaborations with members of the University of Michigan Dept. of Physical
> Medicine and Rehabilitation and the UC San Diego Swartz Center for
> Computational Neuroscience. Experience with Matlab, EEG, and/or gait
> biomechanics is desirable. Interested candidates should submit a curriculum
> vitae, letter of interest, and contact information for three references to
> Dan Ferris, Division of Kinesiology, University of Michigan (
> ferrisdp at umich.edu). Review of applications will begin immediately. *This
> position is for U.S. citizens and permanent residents only.* For
> additional information, please feel free to contact me by e-mail.
>
>
>  *Dan Ferris, Ph.D.*
> Associate Professor
> Division of Kinesiology
> Department of Biomedical Engineering
> Department of Physical Medicine and Rehabilitation
> University of Michigan
> http://www-personal.umich.edu/~ferrisdp/
>
> ferrisdp at umich.edu
>
>
> ---------- Forwarded message ----------
> From: "Wambua Kazi" <wambua.kazi at gmail.com>
> To: eeglablist at sccn.ucsd.edu
> Date: Tue, 29 Jul 2008 22:05:13 -0700
> Subject: [Eeglablist] Pros & cons of Butterworth filter order
> Hello,
>   I am trying to figure out how to bandpass filter an EEG data set.  From
> skimming the literature it appears that Butterworth filters are  commonly
> used for filtering EEG data and strike a good compromise between the
> steepness of the transition band and ripples in the pass and stop bands.
> It's also clear to me that the higher the order of the filter, the steeper
> the transition band.  Are there any cons to using a higher order Butterworth
> filter?
>        thank you for your help,
>             -Wambua
>
> wambua.kazi at gmail.com
>
>
> ---------- Forwarded message ----------
> From: Skotara <nils.skotara at uni-hamburg.de>
> To: eeglablist at sccn.ucsd.edu
> Date: Tue, 29 Jul 2008 15:39:48 +0200
> Subject: [Eeglablist] rereferencing and epochs
> Hello everybody,
>
> sorry for my basic questions. I am a beginner in eeglab and try to figure
> out some basic functions in eeglab. I like to adjust them to my needs.
>
> Is it possible to rereference the data using one of my channels such that
> the rereferenced dataset would be referenced against the new channel divided
> by 2?
> resulting channel = old channel - (specific channel / 2)
> By using 'reref' I wasnt able to do this..
>
> How can I extract epochs by using conditional expressions such as: Extract
> all epochs after event-code x but only if event-code y is following within
> the next z ms?
>
> Have you any ideas, why 'h' instead of 'EEG.history' doesnt work on my
> computer?
>
> Thank you very much in advance!
> Best regards,
> Nils
>
>
>
>
> --
> Dipl. Psych. Nils Skotara
> Universität-Hamburg
> Biologische Psychologie und Neuropsychologie - BPN
> Von-Melle-Park 11
> 20146 Hamburg
> Telefon: (+49)-(0)40/42838-3218
> E-Mail: nils.skotara at uni-hamburg.de
> http://www.bpn.uni-hamburg.de/Skotara.html
>
> --
> Universität Hamburg
> Sonderforschungsbereich 538: Mehrsprachigkeit
> Max-Brauer-Allee 60
> 22765 Hamburg
> Germany
> -
> Telefon:  ++49/(0)40-42 838 68 89
> Fax:    ++49/(0)40-42 838 61 16
> http://www.uni-hamburg.de/fachbereiche-einrichtungen/sfb538/nilsskotara.htm
>
>
>
>
> ---------- Forwarded message ----------
> From: "Alana Firl" <ajfirl at gmail.com>
> To: eeglablist at sccn.ucsd.edu
> Date: Tue, 29 Jul 2008 12:00:04 -0700
> Subject: [Eeglablist] ICA weights blowing up
> Hi, my lab has been using ICA to identify blinks and other artifacts.
> However I've found that about 20% of subjects appear to have data that ICA
> can't find a good solution for. runica takes hours to do just a few steps
> and eventually matlab crashes. All of our data after acquisition is
> processed in eeglab. The data is 128 channels, which we reduce to 75 using
> PCA. After premilinary artifact rejection, each subject has about 30 minutes
> worth of epoched data. I use extended runica, although other versions of ica
> didn't do any better. I did some troubleshooting with the data and runica.m
> and it seems as though, for the "bad" subjects, the weights are blowing up
> every time. For some subjects, their data is just poor quality but for
> others, their data looks clean, and I don't know why ICA isn't working for
> them. Is there anything I can do to get around this problem?
> Thanks!
> Alana Firl
> UC Davis
> Imaging Research Center
>
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-- 
Regards,
M.Murugappan
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