Which assumption of column stability is better: a critical force (Euler's), or force line exiting a critical cross-section (tech. stability theory) ?

More Krzysztof Murawski's questions See All

How to simply increase the inert atmosphere pressure in tube furnace?

I have been setting up the tube furnace to work with inert atmosphere, i.e. H2 and N2 in order to anneal the iron-based metallic powders. The furnace is equipped with vacuum pump as well. The...

18 December 2020 4,006 2 View

How can I add any kind of noise to image for a given SNR?

Dears, what is the best way to add any kind of noise (not only Gaussian noise) to 2D signal (image) for a given SNR? Do you know a good code in Matlab?

30 September 2020 8,788 2 View

What type of noise in MRI image?

Dears, could you recommend the papers in which the types of noise in MRI images were analyzed?

05 September 2020 2,810 4 View

Is there any post-hoc easily applicable explainable AI tool for detections carried out by complex CNN-base architectures e.g. Mask R-CNN?

Hi, I'm aware of numerous Explainable AI (XAI) solutions for CNNs, however they ~all seem to be tailored for classification (or segmentation). I also see that for a small home-made model (lets...

31 March 2020 5,082 5 View

Coronavirus and politics: what does the epidemic tell us about democracy and other regimes?

Most of us experience far-reaching restrictions on private and public life, introduced by governments all over the world because of the coronavirus epidemic. Generally, these restrictions make a...

22 March 2020 6,992 95 View

Are manufacturers obliged to identify all possible food contact surfaces for Listeria monocytogenes or an indicator organism testing?

Hi, Under 9 CFR 430, establishments in Alternative 2b and 3 are required to sample food contact surfaces for Listeria monocytogenes or an indicator organism....

10 March 2020 6,762 4 View

Is it advisable to perform radiometric normalization on multi-temporal Sentinel-2 Level-2A images?

Should I perform such processing step before any analysis i.e. by using pseudo-invariant features (PIFs)?

30 January 2020 6,549 2 View

Consistent with the experimental value, the theoretically calculated proton radius from the theory that mass is of EM origin, what do you think?

Assuming that particle consists of a photon that moves circularly in the loop, creating standing wave obeying the rule that its closed path 2*Pi*R=n*Lambda (1) (resonator where resonator length...

15 October 2019 8,759 12 View

Can friendship be defined by any scientific criteria?

What criteria can be applied to define friendship? Is friendship an object of scholars'/philosophers' thinking? And what does it mean that someone is someone's friend? What are the qualities of...

02 August 2019 6,716 24 View

Can one believe in the existence of God without following any religion?

Is it necessary to accept the idea of God established by a given religion to believe in the existence of God? Does belief in the existence of God inevitably involve the adoption of an ethical...

31 July 2019 4,599 97 View

In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein?

Hi In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein? I got this error in the add-ion stage: Fatal error "./ amber99sb-ildn-HHH.ff / force...

01 March 2021 8,747 4 View

Why does the sum of reaction forces not match the force component of a Free Body Cut in Abaqus?

I am using Abaqus to simulate a plate with in-plane loading. The boundary conditions allow the right edge to move up and down, the displacements on the left edge are fixed. There is no rotation...

23 February 2021 711 3 View

How to include additional force field in GROMACS?

I have a cellulose model system that is best described by the GLYCAM06 force field according to the literature. However, the set of force fields included in the GROMACS package doesn't include the...

20 February 2021 3,309 3 View

I want to simulate a system containing protein and heavy metals; which force field is most reliable for this purpose?

The protein I want to simulate has multiple heavy metals. I wanted to know which force-field I should use with GROMACS to achieve this. Most importantly, do the latest updates in the force-field...

16 February 2021 2,420 1 View

How to obtain parameters to run a simulation for benzene using CHARMM forcefield in GROMACS?

I have been reading this paper Soft Matter, 2017, 13, 1904 and in this paper, they simulate benzene in GROMACS using CHARMM. They mention that they performed simulations of benzene using the...

15 February 2021 5,561 3 View

Gromacs force field and water model recommended for protein hydrophobic study?

Dear All, I received a comment from reviewer about asking me selection of force field and water model. I choose OPLS-AAL and 3-point water model. They mentioned the combination of OPLS-AAL and SPC...

13 February 2021 1,364 3 View

Can anyone please suggest where I can find a reference for ReaxFF parameters for PTFE(Teflon) suitable for use in LAMMPS?

Trying to simulate a ice-PTFE interaction and am unable to find a reference which actually lists out forcefield parameters for PTFE-PTFE interactions using ReaxFF or even other force fields like...

08 February 2021 9,373 2 View

Anyone use GROMACS' pdb2gmx for Adenosine monophosphate (AMP) to use with CHARMM force field?

I am trying to use the following command in GROMACS to generate a CHARMM topology file: gmx pdb2gmx -ff charmm27 -f amp.pdb -o amp.gro -p amp.top The atom list in my pdb file (amp.pdb)...

01 February 2021 7,769 6 View

Is there any difference between "SEP" as a non standard residue and phohophorylated serine?

I am trying to run a molecular dynamics simulation for a ligand that contains a "SEP" residue. also, I am preparing my files using Charmm-GUI using charmm36 ff, but it says that it will rename my...

31 January 2021 6,321 1 View

Does AMBER or CHARMM force field parameters have coarsed grained side chain parameters?

I need to coarse grain the side chain with a single atom. However, what force field parameters do I have to use. Does AMBER or CHARMM have any parameters and partial charges for coarse-grained...

31 January 2021 7,091 3 View