Are there studies that determine the effect of post-exam feedback on student performance?

This applies to general education but I am a medical student. I'm interested to know if there are studies that compare, like for example, a set of students that receive feedback on their exams...

01 February 2019 1,679 4 View

How to interpret Nei's distance (d) and what does a negative d value imply?

I am doing a study on phylogeography. An average pairwise difference and Nei's distance matrix was generated in Arlequin. I am having a hard time interpreting the results. As far as I know, higher...

03 April 2016 6,487 2 View

In terms of evolution, which came first: the endospore forming or non-endospore forming bacteria?

These are of low mole % G + C. Considering the early conditions of the earth, maybe endospore-forming bacteria came first. However, I am not sure of this and I need more reasons. Kindly provide...

02 March 2016 5,568 4 View

Which is the most and least evolved in terms of physiological types: chemoautotrophs, chemoheterotrophs, photoautotrophs or photoheterotrophs?

Knowing the conditions of the early Earth, I could say that the least evolved are the chemoautotrophs. But which of the three is most evolved or most recent? Please correct me if I am...

02 March 2016 6,892 3 View

What is the difference between minimum spanning and median-joining haplotype network? When is one better than the other?

I've seen several networks used in articles. There are also a lot of options to choose from (like in Pop ART). I tried to read on these 2 types of networks, some saying that median-joining is...

02 March 2016 9,387 1 View

Do I need another software to view the results in Arlequin?

Hello everyone. I am working on 16s rRNA. I am having a problem in viewing the results. I have already installed R software so I guess it is not the problem. Attached is a preview after I clicked...

01 February 2016 1,360 3 View

Is MacClade a required program for you to use Arlequin for haplotype analysis?

31 December 2015 7,699 9 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 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

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 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