How can I compare the medians of groups with different sample sizes?

I have two different groups: one that contains the number of ostracod species from mudstone samples (36 samples), and one that contains the number of ostracod species from siltstone samples (120...

22 June 2020 9,945 27 View

How to infer Causality in a observational data?

My Machine Learning model show in different ways, high correlation between parents' education and student's outcomes. I 'm trying to identify a causal relationship in a separate model since the...

11 June 2020 4,186 7 View

What is photogeology?

Belongs to Geology and Remote Sensing? What are the main references available for free (pdf) in this field of knowledge? Is it still a usual field within geology? Best Regards.

16 August 2019 9,706 18 View

Geological Map or Stratigraphic Map?

What is the conceptual difference between Geological Map and Stratigraphic Map?

11 August 2019 2,082 27 View

How to make pbm pakhira index on excell or matlab?

How to make pbm pakhira index on excell or matlab? I am doing groupings by the fuzzy c-means method and would like to validate the degrees of membership by the PBM method, can anyone help me?

08 August 2019 9,014 2 View

Does anyone know how to indicate a free reference on free geotechnology? Which conceptually encompasses all free geotechnologies?

Does anyone know how to indicate a free reference on free geotechnology? Which conceptually encompasses all free geotechnologies?

03 June 2019 2,654 10 View

X-ray panoramic dataset ?

Hello, I am having some trouble to find some good dataset related with panoramic x-ray image.

12 April 2019 1,524 4 View

Can anyone indicate a cosmid vector available from AddGene for gene expression in Pseudomonas or Gram-negative bacteria?

Can anyone indicate a cosmid vector available from AddGene, similar to pJRD215, for gene expression in Pseudomonas and other Gram-negative bacteria?

03 April 2019 3,484 2 View

Can anyone indicate a cosmid vector available from AddGene for gene expression in Pseudomonas or Gram-negative bacteria?

Can anyone indicate a cosmid vector available from AddGene, similar to pJRD215, for gene expression in Pseudomonas and other Gram-negative bacteria?

02 April 2019 2,458 2 View

How to determine the glass transition temperature of pharmaceutical polymers?

Which methodologies using thermal analysis are available to visualize this phenomenon in polymers used in pharmaceutical field?

13 September 2018 2,546 1 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

PACYC PCR not working after several attempts. Would anyone have any suggestions?

So, I have been trying to run a pACYC PCR which will be used later on for a Gibson Assembly. However the PCR is not working. I have already tried gradient PCR and changing extension time; however...

02 March 2021 1,146 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

How can we obtain a modification factor for creep parameters?

I want to obtain standard creep parameters of salt rock by creep parameters of rectangular samples. Is there a modification factor to convert creep parameters of rectangular (prismatic) rock salt...

01 March 2021 7,131 1 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Anyone found any research papers on solar furnace design calculations (for solar concentration)?

I am thinking about working on solar furnace with heliostats that concentrate sunlight and heat molten salt, but currently no luck with research. Not a lot of papers based on the subject. (check...

01 March 2021 5,023 5 View