GLMM in SPSS?

30 November 2020 2,716 4 View

Indicated hydrogens in heterocyclic compounds - nomenclature?

Hello, I have a question to the IUPAC nomenclature of heterocyclic compounds. Usually hydrogen atoms in the ring system not attached to atoms connected by double bonds are denoted as indicated...

03 November 2020 3,313 3 View

Is there a good text/book on trend analyses?

Dear friends, I am looking for a book/text on trend studies and their statistical analysis. So far I found out that a trend study focuses on the same population with different individuals at...

22 August 2020 9,031 3 View

What is the best wearable EEG recording device for research?

Hi there, I am searching a wearable EEG device with as many channels and the highest accuracy possible. I found some papers which reviewed/used the following devices, but still not sure which is...

19 May 2020 5,712 2 View

Is it possible to precisely evaluate a thickness of a NiP-Cr coating on a stailness steel with XRF?

Hello everybody, I have a qestion about the implementation of the XRF to determine the thickness of the NiP -Cr coating on a stainless steel (1.4305). According to the TDS of the base Material,...

24 February 2020 5,574 2 View

HPLC standard (mixture) for performance qualification test?

Has anyone experience in standards or standard mixtures for HPLC with UV detection for performing performance qualification tests? I am searching for e.g. a mixture of 2-3 compounds that is...

12 January 2020 537 4 View

Are there studies on the effects of social media and smartphone usage on real-life interactions?

One thing I keep hearing from people around me is that social media and smartphone usage, especially for the generations who are in their teens right now, have ruined/worsened the way we interact...

29 December 2019 5,242 4 View

Methanolysis and HPLC measurement?

I would like to perform methanolysis of proteins to get the monosaccharide building blocks. After methanolysis the monosaccharides are present as methyl glucosides - how can I analyze them by...

13 February 2019 9,591 1 View

Do you think it is allowed to delete items from the further analysis if these items result in a lower measurement of test-retest-reliability?

03 August 2016 1,324 15 View

I designed a construct containing an IRES to co-express two genes. I only get expression from the first gene (5' of IRES). What might be the problem?

24 August 2015 6,443 14 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

How to assign different material properties to each element in Abaqus ?

Hello, I am writing a python script to generate my model and write the input file. The problem is I have 1000 elements in my mesh and I want to assign different material properties to each...

01 March 2021 9,511 3 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View

How to remove fatty material from plant extract?

The resultant solid was partitioned three times with 250 ml of petroleum ether (40-60/c) to remove any fatty material and evaporated to dryness.

28 February 2021 9,464 2 View

How to modify Johnson cook equation in ABAQUS?

I wanted to add an extra parameter to the existing Johnson cook equation in the ABAQUS simulation. How to add those extra parameters. Ref: A modified Johnson-Cook material model with strain...

28 February 2021 4,841 3 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

How to find the right number of integration points in second order 3d finite elements?

I am familiar with finite element simulations and numerical schemes like the Gauss Legendre quadrature. I also know that the Gauss integration yields exact values for polynomials up to degree 2n-1...

27 February 2021 6,818 3 View

How can we use a hybrid element in Abaqus Dynamic/Explicit for impressible materials?

Hi, all! How can we use a hybrid element in Abaqus Dynamic/Explicit for impressible materials? I have not find the choice for explicit element in Abaqus CAE. I am wondering whether it is possible...

25 February 2021 9,936 2 View