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

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

Differences between sheep blood with Alsever solution vs citrated/defibrinated sheep blood in microbiological media?

I am aware of a study that has compared the use of citrated and defibrinated sheep's blood in microbiological media (Hair Sheep Blood, Citrated or Defibrinated, Fulfills All Req... ), but can...

10 February 2021 5,927 1 View

Applications of General Multiple Sums?

Does anyone know of applications of multiple sums of a sequence? I know of the Multiple Zeta values (which is a multiple sum of 1/N^s). This has multiple applications in quantum physics, QED,...

08 February 2021 8,047 12 View

How can I select the best plasmid after sequencing?

I have transformed a drought-related gene of 1.7kb into pGEMt vector (E.coli DH5 alpha strain). After sequencing the plasmids (3 replicates) 4 changed amino acids are visible at different...

06 February 2021 336 3 View

Can anybody provide me sequences of SPF10 primers?

03 February 2021 1,053 2 View

How do you annotate figures to show significance?

30 January 2021 1,008 3 View

Can anyone suggest a commercial MAT kit to detect Toxoplasma gondii antibodies in animals?

18 January 2021 5,438 2 View

Can anyone help for the content validity of my psychological test?

Good day! I am in the midst of completing my test development requirement under the Psychological Assessment subject. I was wondering if anyone can help me reach experts or psychology graduates...

14 January 2021 1,536 4 View

Which neuropsychological tests assess immediate and delay(24-48hrs) declarative memory/learning (verbal and visual) and procedural memory in children?

it can be either a neuropsychological assessmentfrom age 8 years old or a wel research paradigm

13 January 2021 2,308 2 View

What are some recent publications showing the predictor power of resting state brain acitivity for tasks done outside the MRI scanner?

Looking for recent articles (2018-2020) that showed resting state brain activity can predict cognitive task performance (e.g., attentional and executive functioning tasks) done in the lab AFTER...

09 January 2021 2,310 2 View