This dataset consists of dielectric data taken on 4 liquids on a
high-pressure setup, and data on the measures of isochronal 
superposition on 6 liquids. 

These data were originally presented in: 
L. A. Roed, Master's thesis in Physics, 
Department of Mathematics and Physics (IMFUFA), NSM, 
Roskilde University, 2012.

and were later published in:

L. A. Roed, D. Gundermann, J. C. Dyre, and K. Niss. 
Communication: Two measures of isochronal superposition. 
Journal of Chemical Physics. 139, 101101, 2013.

All experimental information can be found in these references.

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 publications whenever use is made of
the data in publications, presentations, etc. 

Any questions regarding the data can be addressed
to laroed@ruc.dk, who would also appreciate a mail if
you find the data useful.

____________________________________________________________________
The data format is defined as described below:

There is a directory for each sample. The name of the directory
corresponds to the abbreviations used in the original paper (as
defined in table I).

Each directory contains 4-7 data files.

For the liquids 1,2,6-HT, glycerol, 5PPE, and DEP the raw data are 
presented in these files:

temp.dat      : the temperatures in Kelvin.
pres.dat      : the pressures in MPa.
logfm.dat     : the logarithm with base 10 to the frequency where the imaginary part of the dielectric constant is at it's maximum.
logfr.dat     : the logarithm with base 10 to the frequencies in Hertz.
dielIm.dat    : the imaginary part of the dielectric response.
dielRe.dat    : the real part of the dielectric response.

The two last files contain the data. Each column corresponds to a
state point; each row corresponds to a frequency.

For example: dielRe(n,m)+i*dielIm(n,m) is the total complex dielectric
constant at temperature temp(m), pressure pres(m) and frequency
logfr(n).

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

For the liquids DC704 and DBP only the files temp.dat, pres.dat, and
logfm.dat are available.

A file with the values for the two measures of isochronal
superposition used on three shape parameters are available for all
liquids.

These measures are for each liquid presented in the file:

measures.dat 

The first column contains the logarithm with base 10 to the frequency
of the measure (that is the mean value of logfm for the two
measurements), 
the second column is the temperature of the measure
(that is the mean value of the temperature of the two measurements),
the third column is the measure L(W1/2), 
the fourth column is the measure L_T(W1/2), 
the fifth column is the measure L(A), 
the sixth column is the measure L_T(A), 
the seventh column is the measure L(B),
and the eight column is the measure L_T(B).

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

	   Last edited October 2013, Lisa Anita Roed