I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

I need to accelerate corrosion in steel parts that are used in a salt-water environment. Is there a technique for doing so?

I have a structure that employs d-ring swiveling tie-downs that corrode during use and become "frozen". I have sample swivel assemblies that I wish to corrode to see if I can free them using one...

01 March 2021 3,739 3 View

Where to find data on trees in tropical agroforestry?

Hi, I'm looking for data (mainly related to management: growth rate, canopy size, soil and climate preferences, etc.) about tropical trees used in tropical agroforestry. Have you ever heard about...

28 February 2021 7,356 8 View

How to include original NMR data in a manuscript?

hello. i am junior researcher. I received a comment from a reviewer that he could not find NMR data in my submitted paper. I had included the NMR graph with explanation and formula to calculate...

27 February 2021 734 4 View

Does anyone ever solved this following Matlab error : "Error using imaqdevice/start (line 95) pointgrey: Failed to stop the camera acquisition." ?

I use Matlab 2014b to capture some images with a PointGrey camera connected with USB3 port. I initialize the camera in a function which basically execute these followed lines : vid =...

22 February 2021 6,386 1 View

Making my research papers available for readers?

17 February 2021 8,533 2 View

What influences inter-day reproducibility in UPLC-MS/MS analysis?

I was analyzing some metabolites in human plasma. While the intraday precision of these metabolites was acceptable ( less than 20%), the interday precision was quite large. So what influences...

13 February 2021 9,183 9 View

3T3-L1 cells, is this a bacterial contamination or a cross contamination with different cell line? or something else?

Hi, I am experiencing some difficulties with 3T3-L1 cells culturing recently. I am working with 3T3-L1 cells for almost 4 years now and have seen bacterial contaminations/ unhealthy cells and...

13 February 2021 4,040 3 View

What are the main conditions suited for synthesizing a PVDF thin film by solvent casting method?

I have been trying to synthesize PVDF thin film by solvent casting method. I started by using 2:3 DMSO: acetone as solvents. The solution was stirred for 3hrs at 60 deg and was dried at 90 degrees...

09 February 2021 8,850 3 View

Wave velocity and rock density paradox?

Practically it is known that seismic velocity increases as rock density increases, why then does the wave velocity equation involving elastic moduli and density indicate that velocity is inversely...

09 February 2021 1,843 3 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

How to find if Qualitative and Quantitative (discrete) variables have a relation?

I'm going to do a brief research about the dependance between the number of cases of Covid-19 and sex( male/female) . One of the requierements is to use inferential statistics to test the...

18 February 2021 7,092 11 View

Is there any website where I can find daily COVID-19 confirmed cases and deaths according to age and sex for Sri Lanka?

I need to calculate CFR based on age group and sex. For this, I need daily COVID-19 confirmed cases and deaths according to age and sex for Sri Lanka. Where can I find this?

13 December 2020 8,287 2 View

What is the most sensitive Non-invasive prenatal testing for fetal sex determination?

Is 8th week the earliest week where we can determine the fetal sex ?

05 October 2020 9,576 9 View

Sex-specific Occupancy modeling?

I want to employ Occupancy and Detection probabilitiy estimates for a large vertebrate species. Do you recommend using and running different models with presence-absence matrices by sex (i have...

28 July 2020 6,142 3 View

Precision on how does R handles Factors and Numeric Predictors containing the same information in Multiple Regression Model ?

Hello, - I've ran Multiple Linear and Logistic Regression Analysis in R in order to compare the effect of a couple of predictors including Sex and group for IQ (categorically defined as High or...

15 June 2020 8,811 1 View

How to report incidence that is more common in males?

Dear colleagues, I have to report incidence rates for spontaneous pneumothorax, which from a study has an incidence in males of 19.3 and 8.1 in females(per 100000). I wanted to report a general...

20 May 2020 1,413 2 View

Is comparing some rates among the patients with respective rates in general population appropriate in epidemiology?

Is it appropriate to compare rates of (for instance) tea consumers among patients admitted to a hospital with some disease, with rates of tea consumers in general population in the same country?...

11 March 2020 5,560 3 View

Do you know any Excel prepared for probabilistic sampling?

There is software that could be used to do the sampling, but maybe someone has developed any Excel sheet to do the process easily. I would like to do a multi-stage including principally clusters...

05 March 2020 6,627 3 View

The condition has length > 1 in ifelse in r?

When the condition has length > 1 in ifelse in r and there are more than 2 statements how to use ifelse? I have a data set wherre I want to categorise people in to categories using sveveral...

04 March 2020 4,811 6 View