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

How to test single hypothesis with various observation samples?

Hello, I'm conducting OLS regression in order to find value drivers for abnormal returns. My model includes 6 different independent variables, and i'm forming 20 subsamples (observations). My...

03 April 2019 272 1 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

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

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 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

Ideas for Phd's Thesis on pricing (Marketing)?

Hi everyone, I'm studying Marketing and I would like to write my PhD thesis on the topic of pricing. Any specific ideas?

02 March 2021 9,706 5 View

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02 March 2021 3,060 3 View