The methodology for my PhD project is based on data collected from the existing published paper, such as journal(figures), thesis and articles et al..
I was wondering if any researcher knows is this a proper way to analysis the data? the other question is when I use the plotdigitizer(software) to read the figure's data(from other reaserchers' publication) is it acceptable to do this in PhD(the data is not given by the institutes or the researcher, it it OK)?
I raise this questions is because I have seen there are plenty of publications in the field of creep damage analysis which using the existed data and I could not find out if the author obtain those data from the original researcher or read by themselves and cites the resource?
I am really appreciate for your help!
It is ok, in my opinion too. You just maximize the information you can obtain from the literature. For recent publications you can also contact the authors to ask for the orignial data / values, e.g. if you go for a meta-analysis. Of course always cite, do not pretend its your own data
I think it is OK, provided you cite the original sources in your PhD thesis and in the publication. Of course in the analysis you must take into account the lower precision of the digitized data with respect (presumably) to your own results.
It is ok, in my opinion too. You just maximize the information you can obtain from the literature. For recent publications you can also contact the authors to ask for the orignial data / values, e.g. if you go for a meta-analysis. Of course always cite, do not pretend its your own data
I think it is Ok, But you must ask your supervisor Prof. to make sure.
Good luck
it's OK for sure! if you are able to ask the author of the paper that you are interested in, to give you the data then its better to do that otherwise using the software is the only possible way and its very normal to do.
Quhia,
The operative word is O.K. Nariman is correct it is much better to get the original data from the author in order to examine it for yourself. In general I always prefer to review the data myself and chose a different theoretical lens in which to analyze the original data. In this manor one can gain a different interpretation of said data and make your dissertation even that much more.
Hope this helps,
Douglas
In my view it is ok if you digitize data from the literature, analyze and apply the data for your PhD project and cite the original.
For the analysis of creep and creep damage some features may be of importance Creep data for the same material tested in different laboratories may deviate essentially, since creep is very sensitive to the type of processing, tempering, grain size, etc.
If possible, collect creep vs time curves, rather than some characteristics derived from creep curves. In some papers you may find minimum creep rate vs. stress curves, please ask the authors, how the minimum creep rate was computed.
It is also important to document, how (at which rate) the specimen was loaded, before the creep process started.
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