Is the logarithmic transformation a necessary step in time series analysis ?

Hello, I'm checking if the log-tranformation of time series data is a necessary step; We all know the aim of such transformation, but in every study (in time series analysis) we found the authors...

15 February 2021 5,655 14 View

Is the test of the H1 hypothesis in mediation analysis total effect or direct effect?

There are three hypotheses and I carry out direct effect and indirect effects with SEM. H1: There is a significant positive relationship between A and B. H2: There is a significant positive...

08 February 2021 9,141 3 View

How do I convert or prepare a taxi dataset to a time series with the fixed intervals?

I have NYC taxi trips dataset contains multiple attributes like (pickups and dropoffs) coordinates, DateTime also, trip distance and so on, indexed by "tpep_pickup_datetime" coulmn as...

01 June 2020 4,164 4 View

Logistic regression, Linear Regression and Survival models are they complementary methods ?

Hello dear professors and colleagues, I have a data set where I want to applied three methods: Logistic regression , linear regression and survival models, of couse each method focalise on an...

09 May 2020 3,746 7 View

Could the relationship between social media use and 'cocooning at home' be investigated in the Covid 19 process?

Dear academics, I want to do a quantitative research on the use of social media in the process of closing the house in Covid 19 process. At this point, 'cocooning', that is, maintaining a...

24 March 2020 3,879 3 View

Is there any pH buffering system or device for acidic microbiological experiments?

Dear researchers, I am working on acidophilic bacteria and mineral interactions. I will use rock grains in my microbiological flasks and see the effects of bacteria to dissolution of rocks....

18 March 2020 191 4 View

The standard error in the standardized model results section in Mplus7 does not show the standardized error, t value and p-value?

I'm doing bootstrap 2000 for multiple mediated analysis on Mplus7. However, in the standardized model results section,does not show the standardized error, t value (EST./S.E.) and p-value. How...

17 March 2020 9,102 3 View

What would be the effects of coronavirus on publication process and times reviewing of articles?

Hello dear Reserachers, Professors, I'm asking myself and you, for the effects of Covid-19 on publication, reviewing process, and reclassification of priorioties on certain topics; e.g: and with...

15 March 2020 8,598 5 View

Which models are best suited for time-series (multiple variables) data-set analysis?

I have a data-set with multiple variables. I would like to do a statistical analysis to determine the extent of the impact of factors on the change in time, Which models are best suited for...

28 July 2019 2,329 4 View

Agilent 6460 Tuning problem?

It tunes perfectly in Negative mode; and in positive it doesn't see the high masses and subsequently fails. Any ideas?

04 May 2019 8,450 3 View

Energy minimization in LAMMPS using NVT ?

How do I do energy minimization in lammps with NVT ensemble ? I am using the following command and it does not seem to work. It stops at extremely high energy and gives me the error zero search...

01 March 2021 2,294 3 View

How can I edit suggested publications?

Hi there! I regularly receive suggestion about papers and authors that are totally out of my area. Does anybody know how I can fix this? Thank you!

01 March 2021 9,574 4 View

Can you perform the Murexide test on samples fixed in Formalin?

I have a fixed sample and would like to use the murexide reaction to test for uric acid composition. I no longer have fresh samples

22 February 2021 1,328 1 View

Monte Carlo simulation?

Hi, i am conducting a Monte Carlo simulation for my new distribution but the MSE values are increasing while the sample size increase, does any experience this issue before and what should i do...

22 February 2021 3,680 4 View

Which vial septa the right one to be used for HPLC?

This is the unanswered question stored very long in my mind and till now I could not find a right answer. Google search educated me that the red surface is the PTFE material compatible to wider...

21 February 2021 546 3 View

How would I use a glycerol fixation to fix whole brain Drosophila tissue?

I need to take IF images with DAPI on a confocal but I need to use a glycerol fixation. Has anyone done this method before, if so how was it done? Thank you.

21 February 2021 3,081 3 View

Is there any general protocol for immunohistology staining?

I have some fixed slides of tissue and need to do some staining, but I am not sure where to start. There are many protocols online. Any suggestions?

17 February 2021 3,062 4 View

How can a reference point be fixed to an attachment point in Abaqus?

I am currently trying to copy an assembly feature, that is present in an old version of the model I am using, onto a new model. The feature is a reference point that is fixed to an attachment...

16 February 2021 8,872 2 View

What test should I use?

15 February 2021 911 5 View

What kind of tape can be used to fix the samples on an XRD machine?

I have a very thin sample, the thickness is around 1 mm. I want to do X-ray diffraction measurement on the thin side of the sample. What kind of tape can I use to fix the sample, and will not...

13 February 2021 4,153 3 View