ReSpect v2.0

ReSpect 2.0 infers relaxation spectra from dynamic moduli.

UPDATE Aug/Sep 2024:

Please consider using the python programs (https://github.com/shane5ul/pyrespect-freq and https://github.com/shane5ul/pyrespect-time), which are actively maintained, instead of ReSpect 2.0. They have more features, run much faster (nearly 10x faster), and produce more reliable spectra using default settings.

If you really want to use a Matlab program, then I urge you to use a newer version (for oscillatory shear data only) of the program -- ReSpect_v3. It is available on github at https://github.com/shane5ul/ReSpect_v3.

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This application extracts continuous and discrete relaxation spectra from dynamic viscoelastic measurements obtained from small-angle oscillatory shear experiments. This is a revised version of the original ReSpect which is hosted at http://www.mathworks.com/matlabcentral/fileexchange/40458-respect

It includes bug-fixes, new features, and algorithmic changes, described in the ReadMe.pdf file.

It can be used directly from the command line or graphical user interface (GUI). Functions and their tasks are described in detail in ReadMe.pdf file, which includes an example data file.

Run the command "contSpec()" or "discSpec()" to extract the continuous relaxation spectra (CRS) or discrete relaxation spectra (DRS), respectively. To access the GUI panel, run "specgui()".

The algorithms used are described in detail in the following paper:

Takeh A, Shanbhag S: A Computer Program to Extract the Continuous and Discrete Relaxation Spectra from Dynamic Viscoelastic Measurements, Appl. Rheol. 23 (2013) 24628.

Please cite this paper if you use ReSpect and find it helpful.