Are you using directed acyclic graph (DAG) when deciding which covariates to adjust for?

More Evans Otieku's questions See All

Is it professional or ethical to recommend a reviewer for your manuscript as suggested by some journals?

Should authors have a say on who reviews their manuscript taking into account a blind peer review policy?

05 October 2020 3,521 9 View

Is there heteroscedasticity in my data, and if so how can I reduce it?

I am trying to perform a linear regression analysis but I fear that my data has heteroscedasticity, thus violating the assumption of homoscedasticity which is required for linear regression. I...

14 June 2020 199 3 View

Are two values statistically significantly different if their 95% Confidence Intervals do not overlap?

I estimated the percent tree cover for two fields and obtained as an example the following values ( 95 % CI): 13.67% (11.93-15.41%) and 9.27% (7.8-10.74%) . As the 95% CI do not overlap, can I...

09 May 2020 2,359 23 View

Is Linear mixed model appropriate for assessing if there is a difference in tree density between land use types. I have a nested data?

Below is a hypothetical example of how my data looks like in excel. My actual data has 16 sites and each site has about 10 plots, so its a huge dataset). Plots are nested within Sites. I would...

12 April 2020 9,774 6 View

Advice writing an unbiased qualitative research question?

Hi, I was wondering whether kindly souls out there might be able to help me with some advice regarding the formulation of a RQ for my qualitative study please? I'm trying to refine an early...

25 March 2020 6,512 5 View

How applicable are the following models in current times?

Transformative model, Engagement model, University learning model, Responsive university model and Quality management in education model. I would really appreciate to link me to the latest...

06 July 2019 3,084 3 View

How is Reynolds number calculated?

I want to know how to determine the dimensionless numbers such as Reynolds and Nusselt numbers for my combustion modeling. Its a CH4/O2 mixture, diameter of tube is 6mm, length of 60mm. Also,...

02 July 2019 6,901 11 View

Recording very high temperatures in my model of micro combustion in porous inert medium, any helps pls?

Im working on porous media micro combustion in a cylindrical channel. i have been recording very high temperature (2000K-4800K) in the combustor and on the outer wall as well which is made of...

22 April 2019 3,712 3 View

Contamination or Brownian movement?

I noticed an odd spot within one of my polyacrylamide hydrogels. It looked like gel was missing from this spot and was down to the plastic. I zoomed in and noticed this and recorded it. What do...

10 February 2019 7,271 4 View

What is a Good Gene to Identify 4T1 Cells With Q-RT-PCR?

Hi Everyone, I am planning a study to test the effectiveness of a cancer therapy on reducing tumor volume in a 4T1 mouse model. In addition, I would like to see the effect of my treatment on the...

09 December 2018 3,257 3 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

Can I use a graph from a another source in a thesis?

I have a permission from X company to use their graph from a report, but they have a reference in the bottom left corner of the graph as follows: "Source: Database Y". Is it OK to use this graph...

24 February 2021 2,269 3 View

I have need of XRD graph analysis software for phase identification. Can you please provide links for software tools which can be downloaded?

i am trying to download x'pert high score software, but can't download it. please do suggest software for phase analysis

24 February 2021 5,687 4 View

Could you please suggest to me research in which a relation between the shear wave velocity and the degree of saturation for stone was discussed?

Hi all, I am looking for a graph or a relation that relates the degree of saturation and the shear wave velocity for the marlstone. Looking forward to your suggestions Best Regards

24 February 2021 9,690 1 View

Algorithms to filter corrective max and min from a set of data?

I've got this 5 year Direct Normal Irradiance data I downloaded from https://re.jrc.ec.europa.eu/. I ordered this by year and by every 24 hours because I need the DNI curve by max in summer, min...

17 February 2021 2,777 5 View

There is any numerical criterion for identifying neighbours for Voronoi /Gabriel graphs?

If there is a set of n points in a plan (with known x, y coordinates), can I use a numerical criterion to establish if two points are neighbours, given the definition of a neighbour for Voronoi...

17 February 2021 6,914 4 View

Can anyone name this graph type?

I've attached a recreation of this graph type that I need to make for study reports. The clients have sent them to us in the past, but I am trying to make the reporting process more streamlined,...

15 February 2021 9,795 3 View

Buckling analysis of a cylindrical shell in Ansys APDL?

In Ansys APDL, We are trying to validate our shell model for nonlinear buckling analysis considering the initial imperfection (as given by Ahmed et. al.) We have attached our results as attached....

13 February 2021 9,200 5 View