Can anyone suggest any references to articles using first difference regression (also methodological texts)?

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Carboniferous shark teeth - ID help?

Dear everyone! I am looking for some help regarding the identification of two Carboniferous shark teeth from Hungary. See the pic attached. I'd go for Bransonellidae family for A, and Falcatidae...

21 December 2020 1,226 4 View

Hybodontiformes - last survivors?

Hello Everyone, I just ran into the work of Boisvert et al., 2019, in which I found fig. 4.2 a bit confusing. It shows, that Hybodontiformes (pale green) survived till the Miocene, however, as...

13 December 2020 5,180 3 View

Are you a researcher or practicioner in the climate change adaptation field? Do you have knowledge or experience with Monitoring and Evaluation?

Dear Colleagues, My name is Sylvia Lima and I am conducting a survey as part of my Ph.D. research in evaluation of climate change adaptation success in coastal areas of developing countries with...

09 November 2020 6,434 3 View

Protease activity assay?

Hello, I would like to get help! I want to measure the protease activity of pancrease powder. I prepared 10mg/ml stock solution from the pancrease powder and I used 100ul from that and I added...

22 June 2020 1,609 3 View

LED light for plant growth chamber for ecotoxicity experiements - which set up and typ of lighting do you recommend?

We are building a new plant growth chamber for plant ecotoxicity experiments (algae, seed germination, genotox experiment with Vicia faba, Lemna growth inhibition etc. The old one used cooling and...

21 June 2020 8,017 2 View

ANCOVA: When group differences emerge in variable X but age is a significant covariate, how do you interpret the Results?

Is age a moderator in this case? How do you examine its effect (i.e. higher or lower age is impacting the DV?)? Partial correlation? Other?

05 February 2020 2,193 3 View

Why are triple base propellants not used in small arms such as assault rifles?

I would think that the use of triple base propellants in hand-held weapons, such as assault rifles or pistols, would be greatly beneficial as its use would remove the muzzle flash. Also, it would...

26 November 2018 4,079 1 View

Does transposable elements in humans carry human genes?

In case of humans does any transposon type move genes that code for such human proteins that have functions? I've read at several sources that they transcribe the proteins needed for the...

14 September 2018 2,698 4 View

How you solve a problem/task like cooking a pizza or exit a room etc.? How you know what is the next step which is lead to the solution?

How do you know that from the almost infinite action (toolbox), which action you need to choose (which is A , B etc..) to get the next step within the progress toward the target. (Starting point...

30 July 2018 2,763 8 View

How can one calculate the radiative reaction of a dipole for stimulated emission (when the radiation field isn't empty)?

The recoil force of radiation is known for spontaneous emission (for the radiation of an accelerating charge or dipole), when the photon field is empty. Is there any difference when stimulated...

26 June 2018 9,813 6 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 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

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

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 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

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

How to quantitative analize the data of TNBS assay for gelatin?

Estemeed colleagues, I found some issues regarding the quantification of the data for TNBS assay. There are different protocols on how to perform that but it is clear to me the "fil rouge" that...

02 March 2021 2,616 1 View