Why are p-value adjustments made when comparing Kaplan-Meier curves to a reference group but not when using a reference group in a Cox model?

I would like to compare survival among patients stratified by insurance status, where insurance status has 3 potential values (private insurance, Medicaid, uninsured). I would like to treat...

25 October 2020 8,367 4 View

Any recommendations for a high-quality, contract basis, academic illustrator for a paper in Nature Climate Change?

We looking for a high-quality, contract basis, academic illustrator for a paper in Nature Climate Change, any recommendations? Proven track record important.

26 April 2020 7,427 8 View

How do you interpret Likert-scale answers to 15 questions, comparing two samples?

Part of my dissertation looks at a replication of the NEP study conducted in 2000. I'm attempting to compare the two (my repsonses and the responses received in 2000) and see whether my survey...

06 March 2019 4,050 6 View

XRD software

I have a very old XRD program that uses .jcp files for mineral identification. In order to generate the .jcp file, I had another program that was used to examine, pick peaks and create the .jcp...

23 May 2017 1,522 3 View

Modifying sister chromatid exchange assay?

08 November 2016 734 2 View

Can SDS be used to retain beta amyloid monomers and will this impact their mobility?

03 March 2016 5,390 1 View

Is it justifiable, in a longitudinal study not to amend flawed questions? Why?

07 October 2015 2,510 7 View

How to apply survey weights in Stata for the European Working Conditions Survey?

13 June 2015 3,854 6 View

What is a suitable substrate to culture PC12 cells?

I have been using the PC12 cells that require a substrate for adherence. I have used collagen I coated on glass cover slips but have found the cells to not adhere very well. I have read that...

31 May 2015 8,104 3 View

Can one separate the two effects of time/exposure by also including it as an independent variable when using 'offset()' in Poisson regressions?

19 May 2015 714 6 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Good morning research fellows, Has anyone worked with senna alata plant extract on any kind of fish?

Literatures on the piscicidal effect of sennaa alata is scanty. if you have any related litrature either in the bark, leaves or roots used as treatment to any aquatic organism please kindly help...

28 February 2021 9,138 2 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

Experimental Design: How deal with pseudreplicates with immunological and clinical-chemical paramaeters?

Hello everybody, I am investigating the influence of a toxinon various clinical-chemical and haematological parameters in fish. I have three treatments (control, low dose, high dose) in my...

24 February 2021 1,243 1 View

Hi i want to ask that in order to find out LC 50 (96 hours) of particular toxin for fish. Should we keep the animals with food or without food?

if we expose the fish after acclimatization to particular toxin in order to find out LC 50 (96 hours).Should we keep the fish off feed or with feed for that duration. Some literature show that...

24 February 2021 357 2 View

How do I collect online measures in a same-different task?

The same-different task requires to subjects to indicate whether a pair of stimuli seen or heard are the same (say AA or BB) or different (say AB or BA). Researchers often collect offline measures...

20 February 2021 9,226 2 View

Measuring Total immunoglobulin whole-body of fish larvae?

Hi Dear All, I prepared the extract of fish larvae whole body with PBS. Then protein concentration of the whole-body extraction samples determined by the Folin-Ceiocalteu-Phenol method (Lowry...

17 February 2021 1,971 3 View

What is the identity of additional bands found during fish gut microbiome 16S V4 PCR amplification?

Hi, I am carrying out test PCRs for 16S amplicon sequencing on Illumina MiSeq. I am using standard V4 primers: 515F/806R. The aim is to profile the microbiome of fish guts under different...

16 February 2021 5,668 6 View

Is there any free software for behaviour analysis of zebrafish ?

I need to do novel tank test and light/dark test for zebrafish. So I need a tracking software for tracking in these tests. Is there any free softwares available for tracking of zebrafish ?

16 February 2021 1,541 1 View

Is there any kind of data available for connection properties like signal strength between UE and RAN?

Is there any kind of data available for connection strength between UE and RAN? I am looking for signal strength, the geographical coverage of RAN's in a given Tracking Area, Coverage Area over a...

16 February 2021 1,073 5 View