How long can we consider that the data obtained with qualitative social research methods are "current"?

I cannot find any reference that deals with the temporal validity of qualitative data. I think there is a gap in the methodological literature on the temporal validity of the research results and,...

05 February 2021 9,788 20 View

Can I use the images of Collection 1 Level 2 Landsat 5 TM / Landsat 8 OLI to perform vegetation indices right away?

I'm aware that in order to perform any vegetation index like NDVI, SAVI or OSAVI you need to do some atmospheric, radiometric and terrain corrections. I'm pretty sure that Level 2 images from...

21 December 2020 4,088 3 View

BSEM/SEM approach?

Hi all! I'm getting into BSEM approach and I am specially concerned about when it is recommended or not to use this model. I have tested a BSEM with a small sample obtaining excellent results,...

07 September 2020 3,919 3 View

Unable to perfiorm raster to-table join in ArcGIS?

Dear all, I am trying to replicate some results from a publication. There, one of the datasets they use is WISE30sec map (available for download here:...

18 February 2020 6,906 3 View

Low 260/230 ratio using Qiagen DNeasy kit?

Recently I performed a DNA extraction using Qiagen DNeasy kit and the results show a 260/230 ratio of 1.05 likely due the presence of phenol or other organic contaminant... I have read that you...

16 February 2020 787 3 View

Why is the TMB substrate turning blue without being in contact with the sample and in the dark?

Hi everyone, last time I was doing an ELISA without exposing it to the light and before I added the substrate it was turning blue. Do you have any idea or suggestion of a better substrate?, the...

03 January 2020 1,294 7 View

How data is normalized in Transcriptome Analysis Console (TAC) Software?

I'm using TAC software 4.0.2 (Affimetrix) for the first time to analize differential gene expression in two groups of samples (control and treatment). I have problems with the normalization step...

18 November 2019 7,146 3 View

Importance of drying-time after using gelatin as coating?

I am culturing stem cells on plates coated with gelatin. After finding so many variations of drying time in different protocols, I am wondering what is the reason? In other words, why is it...

09 September 2019 9,415 3 View

How to interpret ordinal logistic regression in Stata with ordinal dependant and independent variables?

My question is very straightforward. I have different ordinal independent variables (4 categories), and I am trying to regress it on different ordinal and nominal variables. I want help on how I...

09 July 2019 5,769 1 View

Could you suggest any scale to assess parents' satisfaction with their children's schools?

Hi all! I'a looking for a scale to assess parents' satisfaction with their children's schools. I have found some different papers about parents satisfaction but no one seems to offer just what I...

10 December 2018 8,430 3 View

How do you write a simplified C block code of this average-current control on PSIM?

This is a Buck (step-down) Converter and I am new to this program. I need to program with simplified C block and I actually don't know what to do. Can anyone show me how to do this? Or at least...

02 March 2021 8,233 1 View

Do you know good and user-friendly programs to measure plant quantitative traits?

For my research i will need to measure plant quantitative traits (especially leaves area and roots length, but would be nice to add some more information). I recently discovered...

01 March 2021 5,035 2 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 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

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

Is it possible to set a breakpoint at a specific DYNAMIC instruction using the GNU Debugger (GDB)?

Using GDB, it is straightforward to debug and monitor a target program by setting a break-point at a specific instruction, since the instruction addresses are known. However, we have two...

24 February 2021 1,598 2 View

Implementation of chance-constrained optimization problem via scenario approach?

23 February 2021 7,826 2 View

Is it efficient to do liquid biopsy to investigate the gene expressions of the tumor?

To do liquid biopsy and look for specific gene expressions there are so many published papers. Thera are different protocols and procedures used to isolate circulating cell free RNA or mRNA from...

23 February 2021 7,326 5 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View

Can I use FLEXBAR to detect and remove barcodes out of my short reads without demultiplexing ?

Hello, I have demultiplexed my short reads and I have removed the Illumina adapter left in the sequences and now I need to remove the barcodes used by the sequencing centre from my reads. I have...

22 February 2021 9,873 3 View