Compare to prevalence before and after covid in population studies?

Dear researchers, I have a prevalence of some diet habit in relatively large narrow population of children 13 years old in 2019 and 2020. Logically they are different population. However, since...

10 January 2021 3,170 9 View

Online self reported survey on nutrition and physical activities of children aged 11-12 years old?

Do you have some recommendation for this this type of survey? Some standard form of survey? I am looking for some short form, that can be easily done by children.

25 July 2020 2,641 3 View

GINI fractional regression and log transformation?

I would like to estimate changes in GINI during 15 years. Should I make log transformation of independet varible? Raw data for some independent varibles are not normaly distributed. Sincerely, A.

23 March 2020 1,601 3 View

Relativity of simultaneity and free fall: Do all observers see that two objects reach the surface at the same time when they are dropped?

Hi there, my question concerns a situation in which the law of free fall and the relativity of simultaneity come into play simultaneously. The general assumptions are as follows: 1. if we let...

03 February 2020 7,392 29 View

Bootstraping DEA scores and SE?

Dear all, I try to do a research based of DEA using bootsraping techniques in R packages: Bootstraping and DEAr. Does someone know how to calculate SE with 95%CI and how to obraine summaried...

24 October 2019 6,353 3 View

GINI coefficient EXCEL/R/SPSS?

Dear colleagues, do you have some EXCEL template for calculate GINI coefficient and create Lorenzo curve? I find some R packages but I am not sure how to use it on my date with population and...

12 April 2019 5,293 2 View

What secretes/produces the cytokine IL4?

Hello, I'm little confused about the secretion of IL4. In some papers it is mentioned that B cells secrete IL4, on other that it is Th cells, or even basophils. Can you also provide me with...

13 August 2018 9,329 3 View

Plants as Methane Producers? What is the latest standard of knowledge?

Dear All, not only in all known to me textbooks, but also in my academic environment, plants are only discussed as carbon sinks and therefore planting forests is said to be one of the main...

08 November 2017 6,587 7 View

Does Occam's razor favor MACHOs as candidates for Dark Matter?

Dear All, not only in our university, but almost in all well known to me lectures about Dark Matter, MACHOs (Massive Astrophysical Compact Halo Objects) are rather incidentally discussed while...

25 October 2017 9,570 2 View

Radnom sample froms survey data?

Using survey data, I planed to make log regression. Original sample size is 2000 and there are obaut 10% cases with outcome and 90% withoit it. May I chose amongst thant 90% random sample matced...

19 September 2017 3,296 1 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

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 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

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03 March 2021 5,360 2 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

How can we raise the figure when we writing a paper with Latex ?

Hi, everyone. I'm a starter to write a paper by Latex. But I have some difficulty using it. I'm writing the paper with 2 columns. And, there is one figure that occupies the 2 both-sides. I want to...

26 February 2021 3,738 3 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View

No amplification data for qPCR on MxPro?

I have set up a qPCR run on MxPro with SYBR green and ROX as a reference, however, when I go to the analysis section the program seems to only collect data for the dissociation curves and not the...

25 February 2021 8,039 1 View

Can I use TCA instead of TFA for protein analyis in RP-HPLC?

I am trying to analyze lipase using the reverse phase-HPLC C18 column. In the literature, 0.1 % TFA was and 60% ACN was used. Can I use TCA in place of TFA? If any other methods are available to...

25 February 2021 2,388 3 View