Warning in Lavaan, variance-covariance not positive definite!, model is not identified?

Dear colleagues, I am new to R, I have been using Amos for conducting CFA but came to learn that when dealing with Likert scale, Lavaan in R is a better tool to do such analysis. I started using...

30 December 2020 5,608 3 View

How to identify Microplastic polymers extracted from biota samples ?

It is suggested that FTIR or Raman spectroscopy is quiet useful to identify Microplastics extracted from samples. But when fibers are microscopic in size , then technical issues rises. For FTIR, a...

08 January 2020 1,312 4 View

How to use SmartPls for structural equation modeling?

I want to conduct partial least squares structural equation modeling for my research in SmartPls software . So, is there anyone who provides me the step by step guide of conducting SmartPls...

28 May 2019 3,292 4 View

Can ANSYS solve on multiple geometries at the same time?

I have 30 different geometries that will be subjected to the same fluid flow physics. Can i solve all at the same time in ANSYS workbench instead of each separately?

01 July 2018 9,685 3 View

Pls can someone share DIFFRAC.SUITE EVA software or it alternative for X-ray powder diffraction ?

31 May 2018 3,474 6 View

Pls, is it appropriate to incorporate some part of my published article in my thesis?

I want to know if i can incorporate some part of my published article (which arised from my thesis) as direct copy and paste or its paraphrased version in my thesis. Please is that acceptable?...

12 May 2018 8,163 14 View

Is there any viscosity limit for nanogel formulation?

I'm wondering whether there is a viscosity limit for a nanoparticle-hydrogel composite before it is categorize as nanogel or otherwise. For example, if a formulation is composed by entwinement of...

20 April 2018 1,886 3 View

Anyone who have RADEP (IMBA) or LUDEP program ?

Those programs (softwares) are used for estimation of lung dose caused by Radon decay products .

01 March 2018 7,794 2 View

What will be the effect in massive MIMO channel modeling if we consider the large scale fading to be different for m antennas at the BS?

In Massive MIMO propagation(channel) modeling the large scale fading considered independent of the M antennas and for all m antennas is the same . my question is what if we consider the large...

06 March 2016 6,183 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View