How to perform Cox proportional hazard analysis or Kaplan-meier survival analysis in SPSS?

At first please see the attachment. This experiment was performed for a period of 7 days (n=100). After 7 days, we found different level of survival rate (%) for each treatment. Now, I want to...

15 February 2021 9,145 2 View

For acid treated montmorillonite clays what will be the result of surface area?

The organo montmorillonite nanoclays modified with octadecylamine were used for the experiment. After acid treatment, the surface area will be increase. However, in my experiment, the surface area...

10 February 2021 1,581 3 View

How to identify when a gaussian program is about terminate normally?

Dear all, I am trying to optimize a bimetallic complex using # opt=tight b3lyp/lanl2dz scf=qc geom=connectivity. The program is running for around 5 days but the size of the .chk remains same...

05 February 2021 8,721 3 View

Can I use 500ng of DNA for restriction digestion?

The recommended amount of DNA for restriction digestion is 1ug in a 50ul rx I've got around 500-600ng of DNA in a total volume of 35ul. Would I get satisfactory results with this amount of DNA for...

31 January 2021 729 6 View

What is the effectiveness of online teaching during COVID-19?

Please share your experience on the effectiveness or challenges on online teaching during Covid-19 lock down. Share your experience about challenges, technology, online learning platform,...

26 January 2021 4,532 37 View

LC-MS metabolomics data after annotation some have their compound name but no KEGG id or with KEGG id but no pathway. How to interprete?

Recently I have generated LC-MS metabolomics data. After annotation, some have their compound name but either no KEGG id or KEGG id but no pathway. How to interpret those compounds? Additionally,...

18 January 2021 1,938 3 View

Has there been any scholarly research done in schools that addresses teaching from a global citizenship perspective to deal with global problems?

The current global pandemic, the climate crisis, the destruction of the oceans (with plastics, etc), and massive numbers of refugees are part of a set of serious global problems. It is clear...

13 January 2021 2,022 3 View

How to remove a citation from list of research articles?

I want to remove a duplicate citation

01 January 2021 3,983 3 View

No executable file generates while building geant4 example code, where is the problem?

Hello, I am a newbie in geant4. I'm learning it playing with example. Sometimes, when I go to simulate an example code, it doesn't create an executable file (the green one in my ubuntu terminal)....

26 December 2020 9,482 3 View

How to get structure and topology for glycosaminoglycan (GAG) of arbitrary length?

Hello all, I want to do glycosaminoglycan (GAG) simulation in Gromacs. Initial structure and CHARMM topology for short chains can be obtained from Charmm GUI glycan modeler. But I have to take...

23 December 2020 6,092 2 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

Person-Codes for questionnaires in longitudinal studies: Is there an easy solution for better matching-rates?

Hi, I have a problem regarding matching of longitudinal data in my field of research (university students). We have a Person-Code for matching data measured in different time points, but 30%+ of...

17 February 2021 3,075 4 View

How do I calculate a trend with 3 time points and 3 different groups with a small sample size in a longitudinal study?

Dear colleagues, I am working on an intervention study with 3 different groups of students. One group represents the intervention group and consists of a seminar with a practical phase and...

24 January 2021 8,051 4 View

What is the best and affordable method to make and distribute a survey?

What is the best and affordable method for higher education student to build and distribute a survey in the United States of America with consideration of the following points: There are no...

23 January 2021 9,342 2 View

In this winter, the trend of death and infection rate due to covid-19 in Bangladesh is much lower than USA or other 1st world countires, why?

According to the opinions of experts the casualties caused by covid-19 would suppose to be increased in winter. Similar trend is seen in the case of USA and other 1st world countries....

14 January 2021 2,146 2 View

Are there only winners in the world of exism?

BREXISM finally is over and they got a trade deal with europe now, but exism left the UK poorer according to the news Brexit is finally done. It will leave the UK...

23 December 2020 4,071 6 View

How is chemistry taught in schools in the United States?

How is chemistry taught in schools in the United States? A comparative study of high school chemistry education

10 December 2020 9,972 3 View

GLMM in SPSS?

30 November 2020 2,716 4 View

In SPSS, how to select cases if variable has x but not y?

Hi all, I have an SPSS longitudinal database in which one of the variables is monthnumber. The month ranges from 0 (baseline) through all of the months they were involved and then 51 for last...

30 November 2020 490 4 View

Linear Mixed Models for repeated measures - how can I restructure my data set when some variables are only collected at baseline?

Hello, I plan to perform a linear mixed model analysis to look at change in cognitive function over 5 follow up waves. I am interested in looking at how this change is influenced by dietary and...

27 November 2020 5,087 3 View