What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

What is the most reliable source to get Impact factor of journals?

Source to get Impact factor of journals

01 March 2021 6,654 2 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How much cell pressure and back pressure should I apply to start for triaxial test for different types of soil?

We have recently purchased a triaxial test instrument (MATEST) for testing different types of soil. After installing software, we are facing a issue of saturation where the samples does not...

23 February 2021 7,194 4 View

Best FE Program for Concrete Strengthened with FRP Sheets?

Colleagues, I have been using ANSYS to model concrete strengthened FRP sheets, but less than happy with it. Any has recommendation for efficient, easy to use FE program for modelling concrete...

22 February 2021 7,528 3 View

What is the detection limit of ED-XRF technique for transition metals in silicon ?

Hi everybody, please, can someone tell us if the transition metals (W, Fe, Ni, etc ...) in silicon destined for solar cell manufacturing can be detected by ED-XRF technique. Note that the...

18 February 2021 6,231 4 View

Any information about dinitrosalisylic acid reagent end point color stability ?

I work on estimation of alpha amylase activity using dinitrosalisylic acid reagent If i put the reagent to stope the enzymatic reaction and allow the reagent to react with the produced reducing...

17 February 2021 7,402 4 View

Using liquids as superstrate in Fabry-Perot Cavity Antenna?

Hi, A Fabry Perot Cavity allows to increase the directivity of a low gain antenna by putting in the top of cavity a superstrate with high permittivity such as a ceramic (er=10.2). However,...

09 February 2021 6,799 8 View

How to address mutual causality using Propensity Match Scoring using a panel dataset?

Hello dear researchers. I have a panel data set where I regressed innovation on director tenure. Though, I employed GMM and lag of the director tenure to address the endogeneity and reverse...

08 February 2021 5,809 1 View

How to create the context-mechanism-outcome configuration (CMOc) in the realist methodology?

In the realist methodology (especially by Raymond Pawson et al), the CMOc is a common structure to explain what works, for whom, in what circumstances, and why? I'm always asked about the...

08 February 2021 2,792 1 View

Hello, can you recommend a method to remove serial correlation from path coefficients (standardized regression coefficients)?

I would like to measure the causal effects among variables in a path model, but the variables (time series) may be serially correlated. I'm looking for a method to remove or otherwise manage the...

02 February 2021 210 3 View

Cross-lagged panel analysis and sample size?

I want to estimate the causal relationship between two latent variables over time using structural equation modelling. both latent variables are measured according to different indicators...

31 January 2021 3,777 5 View

Is it possible to calculate entalphy of LiBr/H2O or another solution if we know correlation of specific heat without using any software?

Is it possible to calculate entalphy of LiBr/H2O or another solution if we know correlation of specific heat without using any software?

17 January 2021 5,522 3 View

Can I use a causal model for representing subjective qualitative findings?

I have conducted grounded theory research via mixed methods approach. The study was conducted in two phases. First phase was purely grounded and so ended up while developing core categories and...

05 January 2021 505 6 View

How can i get the data for the FTSE/JSE Responsible investment top 30 index (J110)?

Hi All , Please can you recommend a free database (i already use yahoo finance but it's not avaible) ,or if someone has already worked on this index for the period of 2015 it would be great to...

22 December 2020 247 3 View

How to model the causal effect of working part-time compared to full-time on health?

Hi there, I have to estimate the causal effect of part-time work compared to full-time work on health. I have an unbalanced panel data set with t=2008-2017, except for year 2009. The main issue...

11 December 2020 3,170 3 View

Interested in contributing to a Special Issue in Entropy (MDPI, IF 2.49)?

30 November 2020 1,941 1 View

Which element we can replace in mechanically alloyed FeCoNiAlMn equi-atomic high entropy alloy powder to increase its soft magnetic properties?

Which element we can replace in mechanically alloyed FeCoNiAlMn equi-atomic high entropy alloy powder to increase its soft magnetic properties?

30 November 2020 1,573 5 View