Is it empirically proven that there is an actual and not only apparent increase in mass at relative velocity?

Is it empirically proven that there is an actual and not only apparent increase in mass at relative velocity? If that were the case and the moving object was as big as a spacecraft, which of its...

18 December 2019 2,343 3 View

Do you think Darwin's theory is correct?

Do you agree with evolutionary theory?

07 February 2019 5,915 22 View

What is the difference between digital colors and chromatic colors?

What is the difference between digital colors and chromatic colors?

03 February 2019 8,592 8 View

What are the reasons of different fluid properties in one reservoir?

Some times, there is a significant difference in oil properties, such as API and PVT, in the same reservoir of a field, what could be the reason (s) behind that?

10 November 2018 320 7 View

What are the reasons of different fluid properties in one reservoir?

Some times, there is a significant difference in oil properties, such as API and PVT, in the same reservoir of a field, what could be the reason (s) behind that?

07 November 2018 5,114 7 View

What should be the affiliation of author on a reseach conducted in a school after moving to another school?

I have conducted a research during my PhD study in school 1. Now I moved to another school for a research position. What should be then my affiliation if I want to publish that research, School 1...

07 August 2018 9,392 0 View

Is 10-folds cross-validation the only way to validate proxy or surrogate metamodeling?

Hello, I have a paper accepted with revision at a solid journal. One of reviewers is insisting to do 10-fold CV to validate the proxy modeling. However, the paper talks about using three new...

08 March 2018 208 5 View

Can RBF-NN be implemented in R?

Is there any R-package and tutorial to implement Radial-basis Function Neural Networks?

02 March 2018 5,389 5 View

What are the standard regulations for the produced water quality for reinjection purposes?

05 June 2017 6,695 6 View

What is the exact reason for having difference between oil flow rate obtained from PLT Log and Seperators?

Which is more accurate for measuring oil production rates? PLT log or gravity separators?

05 June 2017 9,855 0 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

RIA. How to measure?

When you use RIA, with a control the unknown sample with antibodies, you bare in mind the binding sites of the antibodies. However you still need to measure labelled antigen (radioactive) and not...

28 February 2021 2,133 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

Bayesian decision trees and bayesian regression trees in Python and/or R?

I am looking for implementation of bayesian decision trees and bayesian regression trees in Python and/or R.. Do you know if the existing libraries support this

23 February 2021 6,689 3 View

Are there packages (R or Python) for simple models (bucket?) to assess soil water content?

Hi everyone. I am researching droguht effects on soil water drought. I am looking for already implemented functions in R or Python to estimate soil water content from precipitation,...

21 February 2021 2,084 1 View

Could the "incoming radiation (net radiation)" values be negative?

Could the "incoming solar radiation" values be negative? What is the difference between "global solar radiation" and "incoming solar radiation"? Which one might be measured negative values?

21 February 2021 7,726 9 View

ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

MVN, how to conciliate contradictory results from Multivariate normality and Multivariate outliers test?

Dear colleagues, I'm working with Path analyses in lavaan and MVN packages. There are some results that for me are confusing and features from the MVN that I do not know how to set. My dataset is...

18 February 2021 190 3 View