What is the best way to determine the frequency of plant fossils in a shale matrix?

07 August 2017 3,801 2 View

How do you recgznize a Permian locality based upon palynology or plant megafossils?

It would be interesting to know the decisive criteria.in recognizing Permian localities.

01 February 2017 9,848 0 View

In modern terms, was Charles Darwin, a biologist, geologist, or something else?

In his time, Charles Darwin was a naturalist who investigated many fields of science.

08 September 2016 5,783 6 View

What is the difference between a chemical signature and a chemical fingerprint?

I think that both terms have been used in the literature. Maybe they are the same concept but maybe not.

02 March 2016 9,864 1 View

What is the difference between precision and accuracy when you are looking at analytical data?

31 December 2015 4,937 3 View

Of all the great hypotheses of the 19th and 20th Centuries which one is the greatest, either in the geological sciences, physical sciences?

Justify your choice and indicate why it is the best.

11 December 2015 2,484 6 View

Have fungi been observed in the organic matter of Carboniferous coal balls?

Fungi are rare in Carboniferous coal where they are classified as the maceral funginite.

11 December 2013 9,154 2 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 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

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

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

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 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

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View