Christian Ungewitter

12 Questions 41 Answers 0 Followers

Questions related from Christian Ungewitter

Do stiff mechanical systems (e.g. rock) react faster on stress rate changes than soft systems (e.g. soil)?

I have a rock specimen and a soil specimen. During my mechanical measurements I observed that the rock reacts much faster on stress rate changes (observable by a sharp kink in the deformation...

10 October 2019 4,836 3 View

Is it valid to build climate models based on natural data?

Climate models are validated and checked on historical climate data. With these climate models it is aimed to predict the climate change induced by human actions. But is this a valid procedure?...

02 February 2019 3,553 4 View

Is there a recommended book or overview article on artificial neural networks?

I'm new to the topic and I want to have a first and broad overview on questions concerning: What is an artificial neural network? What can they do? How do they work? What types of ANNs do exist?...

06 June 2017 3,913 12 View

Is there a free Excel addon or Excel sheet which allows the conversion of normal distributed datsa into lognormal distributed data?

I am searching for a free Excel addon or Excel sheet which allows the conversion of normal distributed datsa into lognormal distributed data.

01 January 2017 7,203 4 View

Is it possible that corrosion takes place in an oil environment?

I think that I have problems with corrosion on a workpiece of stainless steel, but I'm not sure.

12 December 2016 3,659 3 View

Is there a good reference (paper or book) for the topic osmosis?

I am searching for a good reference for osmosis from a physico-chemical/thermodynamical point of view. The publication must provide a general introduction to osmosis based on the chemical potential.

08 August 2016 9,394 3 View

Is there any open source plot digitizing software?

I want to extract data points from a scanned graph. But all software I found was not for free.

07 July 2016 4,328 1 View

Is there a technique to measure the mechanical stress inside a material without contact?

I think of X-ray techniques, applications of magnetic fields or something in this direction.

07 July 2016 8,069 7 View

Are there publications about the application of multiple point geostatistics on mudrocks, argillte, oil shales and so on?

I would like to know if somebody tried to model the pore connectivity and pore size in mudrocks with multiple point geostatistics.

06 June 2016 4,073 0 View

Recognition of pore water distribution by ESEM?

Is it possible to determine the pore water distribution or to visualise the pore water in a mudrock or shale with an environmental scanning electron microscope?

03 March 2016 7,628 6 View

Are there free R- or Python-codes for evaluating triaxial tests?

I'm searching for free R- or Python-codes for evaluating triaxial tests performed with rock specimen.

01 January 1970 3,657 2 View

Are there recommended settings (rotational speed, drift) for overcoring a mudstone in a lab?

I want to overcore a drilled specimen from the field for triaxial testing. Now I need appropriate settings for the overcoring machine to get (nearly) undisturbed mudrock specimen.

01 January 1970 8,111 2 View