This dataset consists of shear-mechanical and dielectric data taken
on 2-butanol and 2-ethyl-1-hexanol.

These data were published in : 

Bo Jakobsen, Claudio Maggi, Tage Christensen, and Jeppe C. Dyre. 
"Investigation of the shear-mechanical and dielectric relaxation
processes in two monoalcohols close to the glass transition"
Journal of Chemical Physics, 129:184502, 2008.

All experimental information can be found in this paper.

This electronic version of the data was published on the
"Glass and time - Data repository" found at http://glass.ruc.dk/data

The authors have copyright to these data. 
The authors have given permission to "Glass and Time" to publish the
data on the "Glass and time - Data repository" web site. 

You are very welcome to use the data for further analysis, but
are requested to cite the original publication whenever use is made of
the data in publications, presentations, etc. 

Any questions regarding the data can be addressed
to boj@ruc.dk who would also appreciate a mail if you find the data useful.
____________________________________________________________________
The data format is defined as described below:

There are 4 directories with raw data:
      Dielectric-2-butanol 
      Dielectric-2-ethyl-1-hexanol 
      Shear-2-butanol
      Shear-2-ethyl-1-hexanol

Each directory contains 4 data files:
     Temp.dat : the temperatures in Kelvin 
     Fr.dat   : the frequencies in Hertz 
     Im.dat   : the imaginary part of the relevant quantity
     Re.dat   : the real part of the relevant quantity

The last two files contain the data. Each column corresponds to a
temperature, each row corresponds to a frequency. 

For example: Re(n,m)+i*Im(n,m) is the total complex shear modulus at
temperature Temp(m) and frequency Fr(n), for the shear data 

If a value in one of the data arrays is 0, it means that no data is
taken at this frequency/temperature. 

Beside the data files, plots of the data exist as png images for
reference. 

Loss-peak positions (as shown in figure 4 in the paper) are also available. 

The directory "Loss-peak-frequencies" contains 6 data files: 
    2-butanol_dielectric_alpha.dat  
    2-butanol_dielectric_debye.dat      
    2-butanol_shear_alpha.dat       
    2-ethyl-1-hexanol_dielectric_alpha.dat  
    2-ethyl-1-hexanol_dielectric_debye.dat    
    2-ethyl-1-hexanol_shear_alpha.dat
each file contains two columns and a number of rows.
The first column is the temperature (in Kelvin) and the second the loss-peak
frequency (in Hertz). 
Beside the data files, a plot of the data exist (LossPeakFrequencies.png) for
reference. 

Notice that the uncertainty on the absolute level of the
2-ethyl-1-hexanol shear data is rather large (as also mentioned in the
paper), reproducibility experiments suggests order of 20%
uncertainty. It should likewise be noticed that the used dielectric
cell is rather soft, introducing errors in the absolute levels on the
dielectric measurements. These issues are unimportant for the
conclusions in the original paper, but might be of concern in other
analysis.


	   Last edited October 2008, Bo Jakobsen