Can someone help me with this error that I am getting while estimating a VAR model in R?

I am using annual time series data to estimate a VAR model in R. However, when I run the command to find the optimal lag length, I get the following error: Fehler in VARselect(data, lag.max = 10,...

18 February 2021 9,647 3 View

What are the easy methods or techniques to synthesize green nano particles?

because many technical steps are there to get a particular plant nano particle and its expensive too

14 January 2021 1,556 4 View

For a PCR the volume of each component is standard ?

for example the total volume is 50microliters how can we know that what will be the amount of template , buffer, enzyme, primers (forward and reverse), dNTPs, MgCl2 and water?

02 January 2021 3,352 6 View

How can we know about the final concentration of each component to be used in the master mix for the PCR ?

Final concentration for each component in master mix depends on what or how it will be known that in this master mix the concentration required is __ microliters ?

02 January 2021 5,764 2 View

A three level hierarchical data structure in multilevel modelling, for multiple response question?

Im refering to Andy Field's example in his book Discovering statistics using SPSS, 3rd edition, page 728, where he gives an example of a data structure with level 1 variable is a memory recall...

26 December 2020 9,717 6 View

How can I separate features and the background to measure pixel intensity?

For image processing, I am using ImageJ. I need to separate the features from the background and calculate pixel intensity of features and background. Can anybody help me in this? Thanks

09 December 2020 7,472 9 View

Which are the appropriate metrics can be used to calculate overall Precision, Recall and F-measure in different data samples? and when can use F1?

If we have three different domain of data (e.g. security, AI and sport) and we did 3 different case study or experiments (1 for each domain) and we estimate the Precision, Recall and F-measure for...

07 December 2020 9,833 3 View

How to convert Unit/mL enzyme concentration to FPU/mL or FPU/g concentration?

Is there any conversion formula for this purpose.

06 December 2020 3,283 3 View

How can stem cells repair damaged cells?

How can stem cells repair damaged cells? Could anyone provide papers show the therapeutic potential of stem cells in vitro (on the disease model)?

29 November 2020 9,534 6 View

How can to calculate the Computational complexity/cost (espatially, number of operations and space/memory cost) for an algorithm?

As we know, computational complexity of an algorithm is the amount of resources (time and memory) required to run it. If I have algorithm that represents mathematical equations , how can estimate...

25 November 2020 6,950 7 View

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 View

How to get onecolumn document from standard IEEE ACCESS LateX template?

I have prepared a manuscript in IEEE Latex template, but for some purpose, I need to prepare a word file as well (detailed format is not required). Compared to two column .tex file, one column...

02 March 2021 1,830 3 View

How can the modification of garden soil cause global warming?

Hello, I am working on a soil project and I found a primary research article that tests how the modification of agricultural soil can cause global warming, using a thermal collector, however I...

02 March 2021 7,161 3 View

Does anyone know how to plot my station to a section plot on Ocean Data View (ODV)?

I made a vertical section plot with WOA .nc file on ODV, and now I want to plot my stations (csv. file) in it. Does anyone know how to import my points to the section? They are two different...

01 March 2021 3,610 1 View

Does anyone know to clarify these changes?

01 March 2021 1,290 2 View

How can I calculate the rdf of water molecules around 'Na' ions that are closest(adsorbed) to the nanoparticle(solute)?

Hi, I want to calculate the radial distribution function for water molecules around the Na+ ions adsorbed on the surface of a spherical nanoparticle using the gromacs trajectory dynamically? For...

28 February 2021 5,650 1 View

How can I convert .vesta file to a .cif file?

I've used the "export data" option in Vesta software to convert my unit cell into a cif file however when I use that cif in atomsk it shows error such as "can't read the position of atom 0". If I...

28 February 2021 4,966 3 View

How to calculate Ligand-active site distance in a ligand-protein complex from MD simulation?

I have run a MD simulation of a ligand-protein complex in GROMACS using CHARMM forcefield. Reviewer has asked me to calculate Ligand-activesite distance and binding free energy of ligand with...

27 February 2021 4,703 1 View

How can I assign a velocity along one direction to CO2 molecules in a molecular dynamics simulation using GROMACS?

Dear all, I am trying to perform a MD simulation about the interaction between CO2 and a polymer. I create my model, solvate it and perform the NVT and NPT equilibration. Now I am not able to...

26 February 2021 10,014 3 View

How does GROMACS calculate the average structure of proteins?

I want to get a average structure from a pdb file containing multiple models. I used the command below: gmx cluster -f input.pdb -s topol.tpr -cutoff 20 -method gromos -av GROMACS...

25 February 2021 6,314 1 View