Can you find any pattern in the two signals, green and blue? The blue signal is the brain wave (measured by NIRS) of a person when he is pressing some buttons (the timing of button pressing is shown i
Wavelet transform coherence (WTC) is a method for analyzing the coherence and phase lag between two time series as a function of both time and frequency (Chang and Glover 2010). Here I played with it
SVM is mostly commonly used for binary classifications. But one branch of SVM, SVM regression or SVR, is able to fit a continuous function to data. This is particularly useful when the predicted varia
Update 2021/2/27: If you find griddata3 not working, try to change griddata3 to griddata. I was asked where to get nirs2img script. Here it is. The download link is at the bottom of this article. nirs2img is to create an image file from the input data. Then theimage file can be viewed by a
I used to use jsMath to support latex in this website, but it no longer works (I have no idea why). The one I am using right now in this blog is MathJax LaTex WordPress plugin. A pleasant surprise is that my old equations (e.g. in Balloon model) stil
We have an online fNIRS Journal Club in the end of each month. For the last journal club on March 21st, the presenter was Dr. Yafeng Pan. Yafeng received his Ph.D in East China Normal University and is a postdoc at Karolinska Institutet. He has publi
Our literature altert app Stork has many users in US and China. Our server is located in US West (silicon valley), and it’s been fast. But recently we got more and more complaints from China users that it’s slow to load our website and so
Like Steve Blank’s many other stories, this one is very interesting. Steve Blank is well known in startup community. He was a sucessful entrepreneur (co-founder of E.piphany), influential teacher, and very generous in giving advice to startup f
Light travels in a straight line. When light is reflected by a mirror, the incoming angle is equal to the reflection angle. When light enters water, it changes its directions according to Snell’s law. … Or does it? These light behaviors a
Stork has an update and we need to send an email to our users. In the email we wish to show a super short video demonstrating the new feature. However, embedding video in email can be complicated. A GIF picture will be much easier for users to consum
