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 to use CCDC to find CIF files?

Seems like a silly question but I'm having trouble with searching for CIF files via https://www.ccdc.cam.ac.uk. I've used it before but I was on university campus so I think I was able to use more...

25 March 2020 1,271 3 View

Did anyone ever tried to extract springtails from muck soil with Berlese funnel?

We tried this last summer, but with no results, even if we were able to see them on the ground. We have already test for different heat sources (60W, 25W, 10W)...It seems that nothing is going...

01 February 2019 1,960 2 View

Why do I get variation in ELISA (sandwich) results?

Hello, we have been performing in our lab a validated ELISA test and we are getting a lot of variation in results. We have a std curve with each test and we also include a control sample and we...

02 March 2018 3,014 5 View

Can the result from Zetasizer analysis considered as the size of the nano particle?

11 May 2017 5,099 9 View

What is the process used to coat Ag with PVP? Could one just mix PVP with AgNP in distilled water and shake it?

Appreciate any input

10 January 2017 923 3 View

How to measure magnetic nano particle (iron) grain size without chemical compound?

Since SEM and TEM both have metal probe, I am wondering if there is any other way to measure magnetic nano particle (iron) grain size without chemical compound. I know that XRD could be an option...

12 July 2016 8,071 1 View

Perform classification data mining on attached dataset using Weka to build model that could be used to predict lateness?

Please help!!! I am new to Weka, and have to do a project for school regarding classification. Is there anyone familiar with Weka that would be willing to point me in the right direction? Thank...

19 April 2016 4,144 2 View

What is the influence of fluid leakages on vortex generation inside the diffuser of a pump tested in air?

When a pump is tested in air, fluid leakages are entering inside the pump through the gap betwen the impeller and the diffuser for some flowrates. These fluid leakages can significally modify the...

20 February 2016 4,696 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

Are there methods for automatically mapping floodplains, fans and terraces?

I want to map these river geoforms with as little subjectivity as possible. I have a high resolution DEM generated by drone data.

22 February 2021 7,800 3 View

Covid 19 Pandemic ' impact on digital transformation?

Covid 19 Pandemic and digital transformation

22 February 2021 3,351 5 View

How can we improve AI in detecting fraudulent activities on digital payments?

I am conducting a study on the effectiveness of AI towards detecting and averting digital payment fraud. What are the popular AI techniques being adopted in mitigating digital fraud and how could...

21 February 2021 3,888 4 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

Are we using now IT technology effectively?

I discover now two my papers, which are more then 30 years old and which are describing something, what was done in years 1985 -...

21 February 2021 5,008 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View