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...

09 October 2019 4,718 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?...

01 February 2019 3,466 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?...

05 June 2017 3,778 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.

31 December 2016 7,110 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.

11 December 2016 3,569 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.

07 August 2016 9,295 3 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.

06 July 2016 7,984 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.

05 June 2016 3,977 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?

02 March 2016 7,530 6 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 8,019 2 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

What is the difference between genotype and haplotype data in the ped format?

Hi everybody In the ped format for genotype, alleles of any SNP are represented by two columns (one for each allele, separated by a space). Is a column sufficient for the haplotype to...

27 February 2021 1,965 1 View