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 to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

How to manually calculate p value in ANOVA? what is the equation or formula for it?

How to manually calculate p value in ANOVA? what is the equation or formula for it?

03 March 2021 4,928 5 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Could any one guide me, to write research proposal for grant? ?

We have one plant, the local people using this for controlling blood sugar, the toxicity and antidiabetic activity of the plant is not reported yet, please guide from whag should be the process ?...

02 March 2021 2,300 1 View

No title

01 March 2021 3,905 5 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 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