Please give idea to calculate Watson''s U squared test in excel or any other package may be R if you have codes and tutorial for matrix preparation.

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What is the mechanism behind the finding of the band gap in core-shell nanocomposite materials?

The band gap of metal-semiconductor-based core-shell nanocomposites is very narrow compared to their semiconductor nanoparticles. Is it characteristic of core-shell structure or any other doping...

31 January 2024 8,512 4 View

How Influences trap energy and temperature on the current-voltage (J-V) characteristics of a solar cell?

Relation to determine trap energy from J-V characteristics obtained at varying temperatures of solar cells and expound upon the optoelectronic parameters based on the trap energy.

30 August 2023 9,899 2 View

What are the exact relationships between the absorber thickness, the defect density, and the excitons diffusion length in perovskite solar cells?

Requested scientific theories and comprehensive experimental data.

13 June 2023 703 3 View

Regression model evaluation?

The same model provides 0.94 R2 value for one test set (9 observations) while 0.73 R2 value for another test set (95 observations), however, 0.73 R2 is associated with lower RMSE and MAE. how to...

18 May 2023 4,016 3 View

Can the uncertainty value (calculated from repeated measurements) be lower than the accuracy of the instrument?

I have calculated the uncertainty from repeated measurements. Is it possible to have an uncertainty value, which is lower than the accuracy (given in the specification) of the instrument?

26 February 2023 5,930 6 View

EvaGreen; Q4ever Green, SYBR Green - which would you choose for your qRTPCR?

SYBR Green I is an asymmetrical cyanine dye. The relative fluroscence of this dye increases when it binds to double-stranded DNA. This precisely quantifiable increase of fluroscence intensity is...

01 November 2022 4,417 0 View

Is it possible to keep the HRR of a CI engine constant?

Hello everyone. It is well-known that A/F ratio is not a direct regulated parameter in CI engine. Additionally, the A/F ratio is not required to be kept constant as the fuel supply in CI engine...

19 September 2022 4,702 0 View

What is the range of 'Zeta potential' for water-in-oil emulsion surface?

Hello Everyone, I have found that the zeta potential values of my samples are very close to zero. I have used TWEEN 80 and SPAN 80 at different proportion. The HLB value I have kept in the range...

07 February 2022 8,146 7 View

How to remove water from 85% orthophosphoric acid [[H3PO4]?

My experiment needs anhydrous orthophosphoric acid and we only have a 85% aqueous solution. Any method to dry it? Most of the literature I found deals with purification from metal ions present in...

18 January 2022 5,657 1 View

How can I synthesize and characterize tris-(triethylammonium) phosphate [(Et3NH)3 PO4]?

I tried neutralizing orthophosphoric acid with triethylamine using 1:3 stoichiometry by stirring the two liquids at room temperature but a lot of triethylamine remains unreacted which suggests...

08 December 2021 9,228 0 View

How can I showcase the extremely small value that approaches 0 in the ARDL approach's long-run equation?

I ran the ARDL approach on E-Views 9, and it turns out that the independent variable has a small coefficient, but it appears as zero in the long-term equation as shown in the table, despite having...

23 December 2022 7,644 5 View

What's The difference between R squared in ARDL model and R squared in bounds test?

Using E-Views 9, I ran the ARDL test, resulting in an R-Squared value in the initial ARDL model output and an R-Squared value under the Bounds test. so, what is the difference between these two R...

03 December 2022 800 2 View

NEPLAN software simulation ?

hello all, I'm looking for a comprehensive guide on how to add pv panel to neplan Library . ? Thanks !

10 May 2022 2,592 0 View

How can I test the relevance of my dependent variables before and after an event?

i'm having problem in deciding how to run the regression. i want to see whether before and after covid, banks look at different characteristics when pricing loans. If for example in the period...

10 November 2021 7,702 11 View

Sample size in panel data?

Dear colleagues, I am planning to investigate the panel data set containing three countries and 10 variables. The time frame is a bit short that concerns me (between 2011-2020 for each country)....

15 August 2021 8,734 6 View

What is the optimal number of lags for an ARDL model?

I am running an ARDL model on eviews and I need to know the following if anyone could help! 1. Is the optimal number of lags for annual data (30 observations) 1 or 2 OR should VAR be applied to...

18 May 2021 2,994 6 View

Event Study Tools Website Manual?

Dear All, I would like to perform event study analysis through website: https://www.eventstudytools.com/. Unfortunately they ask for uploading data in a format i dont understand , dont know how...

07 September 2020 4,866 7 View

What does it really mean to "hold other variables constant" in a regression?

To illustrate my point I present you an hypothetical case with the following equation: wage=C+0.5education+0.3rural area ( Where the variable "education" measures the number of years of...

10 July 2020 3,090 12 View

Can I make a mediation analysis just with my variables of interest or do I have to include, also, the control variables?

In order to analyze if there is a mediation effect using Baron & Kenny's steps, is it necessary to include the control variables of my model, or is it enough to do the analysis just with the...

11 December 2019 9,145 6 View

Is the F test useful when one of the variables of the group I'm studying is already significative?

Reading Wooldridge's book on introductory econometrics I observe that the F test allows us to see if, in a group, at least one of the coefficients is statistically significant. However, in my...

11 December 2019 3,755 6 View