Search found 9 matches

by Matthew
Thu May 31, 2012 8:27 am
Forum: BioSemi Hardware
Topic: understanding active electrodes and impedance
Replies: 4
Views: 58894

Re: understanding active electrodes and impedance

Hello, In reference to BioSemi's active electrodes, the original poster asks the question "Why does the impedance across the gel/skin/electrode interface no longer matter?" I've been reading through the forums and notice that there are many descriptions about why 'electrode impedance' is negligible ...
by Matthew
Thu May 31, 2012 1:50 am
Forum: EEG data analysis
Topic: EEG - frequency processing question
Replies: 2
Views: 11466

Re: EEG - frequency processing question

Thanks very much for your reply, Coen. I have since explored LabView's library of subVIs, and have been able to accomplish my original goal by avoiding filtering and instead performing power spectrum analyses for each channel.
by Matthew
Tue Mar 20, 2012 5:15 am
Forum: EEG data analysis
Topic: EEG - frequency processing question
Replies: 2
Views: 11466

EEG - frequency processing question

Hello, I am trying to take the 2D array of samples from 64 EEG channels in the ring buffer, and process these to determine in real-time the respective power of delta, theta, alpha, beta, and gamma brain wave activity. I am attempting to do this using bandpass filters within an auto-indexing for-loop...
by Matthew
Sun Oct 09, 2011 6:45 pm
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Thanks Paul. It seems that no matter how 'BioSemi-Labview_DLL.framework' is being referenced (e.g. referring to the structure itself; referring to its containing folder; using '/', '\', or ':' as separators between subdirectories), a message immediately comes back saying "The file selected is not a ...
by Matthew
Thu Oct 06, 2011 4:04 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Thanks Paul, these instructions were very helpful. In response to Coen, the program ran and output the following over the first 20 seconds: **************************************** Parameters can be, in any order: Time to run, in seconds: default is 600 seconds (10 minutes) 0=unlimited Ring buffer s...
by Matthew
Sun Oct 02, 2011 1:45 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Thanks for your continued assistance, Coen. I had a chance to try the Labview_DLL_SyncTest in the lab yesterday. I wasn't clear from within the INSTALL-MAC.txt instructions where to 'type "./Labview_DLL_SyncTest 0" to start the test program.' I tried this in the Mac Terminal interface nonetheless, a...
by Matthew
Thu Sep 29, 2011 5:14 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Hm, yes I am working in a different OS: OSX 10.6 (32-bit). Would this create a compatibility issue?

Thanks,
Matthew
by Matthew
Wed Sep 28, 2011 3:38 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Thanks for your response, Coen. I have downloaded the ActiMac folder from the link provided. Upon opening "ActiView700-Mac-Rev15.vi" in LabVIEW 2010, a list of 15 errors show the following Library Function Nodes as "Library not found or failed to load": READ_POINTER OPEN_DRIVER_ASYNC CLOSE_DRIVER_AS...
by Matthew
Mon Sep 26, 2011 4:41 am
Forum: BioSemi Software (LabVIEW programming)
Topic: Developing ActiView with LabView 2010 for mac
Replies: 13
Views: 44352

Developing ActiView with LabView 2010 for mac

Hello, I'm looking to further develop ActiView using my version of LabView 2010 for mac, but seem to be faced with some obstacles. Upon starting up any of the ActiView sourcecode programs, LabView was originally unable to find Labview_DLL.dll or the following files in the <vilib>:Utitlity:inputDevic...