How to select threshold for bi-variate frequency analysis of extreme rainfall events?

I am trying to do a bi-variate (average intensity and duration) frequency analysis of extreme rainfall events for urban flood studies. I have hourly rainfall data for 45 years and have delinted...

03 April 2019 8,282 3 View

What are the effects of Capacitor C3 in the circuit?

27 March 2017 8,840 18 View

What is the algorithm used by matlab's built-in 'bvp4c' function in solving boundary value problems?

I want to know the method used by 'bvp4c' to converge to the solution. Thanks.

04 August 2015 9,350 1 View

How much Electric power could be generated by a piezoelectric material by applying our weight on it?

Does this power generated can be stored in batteries? Application could be in shoes and foot paths in order to harvest energy. I'm working on these applications would like to know all the possible...

01 January 1970 8,428 4 View

How to get the vector of a specific vibration mode in phonon dispersion?

For example, I have this phonon dispersion(Fig. 1), and now I would like get vector of atoms which describes TA1 in P. I know v_sim can show vibrational animation of specific mode, but I do not...

20 February 2021 4,332 4 View

Can anyone suggest a numerical method to calculate perimeter of a contour in charge density contour maps?

Hi i have drawn the charge density contour maps using VESTA taking CHGCAR files from VASP. Now, What I Want is that I need to know the perimeter of each contour appearing in the cross section 2D...

04 February 2021 3,637 1 View

Why VASP MD Crashes with ALGO = Fast ?

Hi, I'm doing molecular dynamics on a 168 atoms system with a 20 A vacuum. To speed up my calculations, I set ALGO = Fast tag in INCAR, but surprisingly VASP crashes momentarily!. I have done a...

25 January 2021 9,876 3 View

Why it is required to optimize a unit cell generated from cif lattice parameters and atomic coordinates during ab initio solid state calculations?

A cif file represents a unit cell with minimum energy. My question is, in the start of any ab initio calculation for unit cell generated from the cif file, why we are advised to optimize cell...

19 January 2021 9,883 3 View

Software for bond manipulation with POSCAR (VASP) files?

I am calculating adsorption energies of molecules on surfaces using VASP. Every time I want to modify the starting configuration of the molecule, I am doing this long process of converting...

19 January 2021 2,624 3 View

Exportation of Effective Potential using DFT on VASP?

Hello! I am a student and I am new to using VASP. My question is when performing DFT, is it possible to export the effective potential (Veff(r)) to be able to use this for calculations in MATLAB...

18 January 2021 9,442 1 View

How VASP perform selfconsistent noncollinear calculations?

Selfconsistent noncollinear magnetic calculations can be done in VASP. I am wondering how VASP update the spin directions at each local site. For molecular dynamics, VASP search the next...

16 January 2021 1,398 3 View

Recognition of Molecules from a file containing molecular dynamics trajectory?

Can anyone recommend a good code/software/implementation to identify the change of molecules (bond creation/break, number of molecules at a given timestep, etc.)? I am currently working with XYZ...

12 January 2021 1,655 4 View

DFT Optical calculation and plotting of Real and imaginary Permittivity.??

Dear DFT Community, i have calculated Frequency dependent optical permittivity of Au using (VASP) my INCAR tag includes LOPTICS=.TURE., my OUTCAR has expected frequency dependent IMAGINARY...

30 December 2020 9,543 9 View

VASP - Convergence Problem?

Dear All, I am new to DFT calculation, and I am using VASP. In a lot of my jobs, the forces are already smaller than the EDIFFG tag that I set in the INCAR, but, the jobs won't stop!!! The jobs...

26 December 2020 1,045 6 View