In DFT or HF, is it more expensive to calculate the H matrix or to diagonalize it?

I was wondering: in common DFT (or Hartree-Fock) algorithms/codes, and in particular in solving the Roothan equation, what is the most computationally expensive part: 1- evaluate all the terms of...

01 February 2021 396 2 View

Suggestions for transfecting plasmids in ME-1 cells?

Hello everybody, I am currently working with recently purchased ME-1 cells. I was wondering if anyone that has experience transfecting this cell line, or even lines that are similar, would be...

08 October 2020 9,943 2 View

What is the mathematical relationship between degree of extraction and CO2/sample mass ratio in SFE?

In a supercritical fluid extraction system, what is the equation describing the relationship between the mass of extract or the degree of extraction (m extract/m extract(0)) and the amount of CO2...

07 October 2020 6,433 2 View

How to run a statistical comparison of same group and 2 conditions in fMRI?

Hi everyone, I have some doubts about which statistical test to apply in order to test the probability of eventA to happen at the same time of non-eventB. Basically I have my fMRI group with...

14 September 2020 1,887 3 View

Is there a difference between using potassium lactate or sodium lactate as preservatives in a product which will be used as intervaginal device?

If anybody could advise from medical or chemical prospector

23 March 2020 9,971 3 View

How can I effectively inoculate Pseudomonas syringae pv. actinidiae in young kiwi plants?

Hi everyone. I have to start a trial of efficacy of bacteriophages against the kiwi bacterial canker, but before I need an effective method to inoculate my 15 6 months old kiwi plants with...

24 November 2019 383 3 View

Is there a device which can dillute a gas-sample before it enters a continious-flow gas-analysator?

I want to measure gaseous NH3 emitted from slurry with the gas-analysator G2508 from Picarro. I expect the concentration to be ten and more times higher than the operating range of the...

02 October 2019 8,276 3 View

What statistical test can I use to test hypotheses with a limited sample size?

For my bachelor thesis, I'm seeking to prove that the degree of adoption of value based pricing strategy has a positive effect on the innovation performance of SMEs. At first, I thought to use a...

05 June 2018 8,364 17 View

Any interested in mixed cryoghlobulinemia in Egypt ?

I am interested in the epidemiology of mixed cryoglobulinemia (MC). Japanese people infected by HCV do not develop MC, therefore MC seems to be confined to caucasians. Nobody knows what happens in...

22 July 2017 782 3 View

Which is a correct stainless steel for a vessel with maximum stress of 380 MPa, decent corrosion resistance and good machinability?

04 July 2017 6,719 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to choose ANN number of hidden layers and nodes?

Hello, Could you please share any interesting research explaining how to choose the number of hidden layers and nodes per layer in case of regression problems using ANN? Thank you, any help would...

01 March 2021 6,200 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

Can anyone provide the Support vector regression code structure of LIBSVM MATLAB or python ?

Please, if Gaussian Parameter optimization is possible in this code structure

28 February 2021 278 3 View

How could I take into consideration the weights of observation in a system of seemingly unrelated regressions (SUR) in rstudio?

I build a model of 4 regression equations (probit and OLS) in R studio. I need to take the weights of observations into consideration. While it is simple to do so for every regression equation,...

27 February 2021 1,233 1 View

VIF very high, but correlation is low and coefficient is significant. Which one whould I choose?

Hello. I have a question whether if my coefficients (statistically significant) would be valid when VIFs are really high. In my model, there are independent variables(IV), moderating variables...

26 February 2021 956 13 View