VIF very high, but correlation is low and coefficient is significant. Which one whould I choose?

Hello. I have a question whether if my coefficients (statistically significant) would be valid when VIFs are really high. In my model, there are independent variables(IV), moderating variables...

26 February 2021 956 13 View

How to clean up TEM grid with plasma cleaner?

I need to clean the hydrocarbon contamination on the carbon substrate of TEM grid. However, I heard that substrate could be broken by the powerful plasma. My substrate is pure carbon, with ~3nm,...

23 February 2021 3,262 5 View

Sb2Te3 thin film annealing and damage(break)?

21 January 2021 9,642 2 View

When comparing two very similar surveys taken over time, but with different sample size, what would be the best way to approach this problem?

Hi, I'm currently analysing a survey for a university course design, and some guidance would be very much appreciated. The students who are enrolled in a (year-long) course were given a link to...

08 December 2020 6,624 9 View

When analysing survey using Likert scale, is it okay to use Friedman's test?

Hi, I'm currently analysing a survey for a university course design, and some guidance would be very much appreciated. The students who are enrolled in a course were given a link to participate...

06 December 2020 6,060 2 View

How many journal articles should come out of a doctoral thesis?

Is it normal if I publish my doctoral thesis into only one journal article (since my doctoral thesis will be data-heavy and theory-light)? Or are doctoral theses expected to be equivalent to 3-4...

01 December 2020 3,803 14 View

Which time-serie model is good when using concatenate data?

I would like to make a model using sequence datasets. As I've searched that , many LSTM, RNN tutorials use long-sequential data such as weather in 1950-2020. However, my datasets are short...

24 November 2020 808 3 View

Could you answer some basic questions on CRISPR-cas9?

Hi, I would like to ask simple some questions related to CRISPR-Cas9 that I could not understand by reading some basic articles on it. I am not in that scientific field so my questions might be...

21 October 2020 2,439 2 View

How can I design resin column for test?

I'm interested in the research field of ion exchange resin. I want design about resin column with acryl for test. How do you usually design the diameter and length of small columns for test? I...

13 October 2020 3,443 2 View

How do you check the locations of brain-implanted cannulas?

Hello. I implanted single cannulas bilaterally into the brains of mice to infuse drugs. After behavior tests, what would be the simplese way to validate if the cannulas are in the target areas?...

18 September 2020 8,457 3 View

SDS page software for analysis?

I did sds page to determine the difference in protein expression between 3 types of vaccine , but i don't have scanner or densitometer available. . so i wonder if there is a software to analyze...

02 March 2021 6,270 3 View

Mediation path analysis - Can I run two seperate models?

I am wanting to run a serial mediation model with 2 x IVs, 2 x MVs, and 3 DPs (all continuous). Is it problematic to run 2 different models for each IV, keeping the MVs and DPs the same in each...

27 February 2021 5,681 3 View

Do I need to ask permission to use pictures for my questionnaire?

I would like to use some photo from a government website for my questionnaire. But, different photo is from the different owner. So, should I just get permission from that government body or still...

23 February 2021 1,631 3 View

Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View

Is there a suitable way to confine cell attachment area inside a multi-well plate?

Are there any types of cylindrical cell culture inserts that are designed to confine cell seeding area? Say, if I'm using a 12 well plate (3.5 cm^2/well), but only want to seed cells in the middle...

22 February 2021 7,127 4 View

No title

The regenerated cellulose film was prepared by zinc chloride/H2O system. The zinc chloride had been washed away in the regeneration process, and the wet film which was not dried had uniform...

18 February 2021 9,538 1 View

How can a reference point be fixed to an attachment point in Abaqus?

I am currently trying to copy an assembly feature, that is present in an old version of the model I am using, onto a new model. The feature is a reference point that is fixed to an attachment...

16 February 2021 8,872 2 View

Onset of Photo Oxidation in Polymers?

Hi! I am looking for some specific information in regards to the minimum amount of UV intensity required to begin the photo degradation process in polymers. I understand each polymer is...

15 February 2021 7,703 4 View

How to determine the significance of "diagonal" contrasts in two-way ANOVA interactions on SPSS?

Hi all, I'm running a 2 x 2 between-subjects ANOVA with the setup in the attached image (kindly refer to JPG attachment). I understand that calculating simple effects involves determining...

09 February 2021 547 3 View

Whether L version and D version peptidesshould have identical NMR, especially in the state of self-assembly?

Whether L version and D version peptides should have identical NMR, especially in the state of self-assembly have to have identical NMR? How to use HRMS to confirm L version or D version...

01 February 2021 6,756 4 View