How can i operate kruskal wallis test for survey data in stata?

Hi, Please i m trying to compare medians of independant groups in the framework of epidemiological survey. I would like to know if there is a special command dedicated to pweight kruskal wallis...

08 September 2016 8,239 0 View

Use of weighted correlation?

09 October 2015 2,801 8 View

Where can I get data about immunoassay performances for salivary cortisol assay?

I want to assess the variability effect of salivary cortisol by immunoassay kits on diagnosis of cushing syndrome and other surrenal related pathologies.

31 December 2014 5,521 9 View

Salivary thyroxin assay why not a future?

Why researchers don't give any interest on thyroid hormones analysis in saliva?

11 December 2014 150 3 View

It is necessary to practice solvent and chromatography extraction to an accurate measure of salivary cortisol with immunoassay techniques?

When used the immunoassay method, several metabolites are able to interfere with salivary cortisol determination especially in sample from neonates, therapy replacement, oral prednisolone use...

10 November 2014 2,813 3 View

What type of resin should I use to extract iodine from biological samples (urine, serum)?

In our laboratory, we tried to measure iodine levels by ion selective electrodes. However, our direct assays were subject to interferences from other anions like fluorine, bromine. We would like...

03 April 2014 452 2 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How to find a correlation between coordinates in a curvilinear coordinate system?

Hello. I have a skewed elliptical coordinate system (I use alternative elliptical coordinates). And I need to determine connections between coordinates in order to fetch a covariance matrix of...

28 February 2021 364 3 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

How could I process data in RCT to include it in meta-analysis?

I'm in the process of doing a meta-analysis and have encountered some problems with the RCT data. One of my outcom is muscle strength. In one study, I have three different measurements of muscle...

25 February 2021 7,603 3 View