What is the analogue of a dielectric in magnetism?

Capacitors and dielectrics pertain electric phenomena, one could say that inductors can be considered analogues of capacitors in the magnetic case. Is there a dielectric analogue in magnetism?...

02 March 2019 8,302 5 View

How to implement tightly coupled nonlinear odes using ode45 in matlab?

I am solving a problem from fluid dynamics; in particular tightly coupled nonlinear ordinary differential equations. The following is a scaled-down version of my actual problem. I have solved...

10 November 2018 4,357 27 View

Unsolvable Nonlinear differential equations?

Could there be nonlinear ODEs that could not even be solved numerically? I am working on a third-order nonlinear problem which is giving accurate results for a given set of initial conditions...

10 November 2018 2,072 7 View

Solving second order (or even third order) nonlinear coupled ordinary differential equations using Fortran?

I have solved system of ODEs multiple times in the past. But for some reason this particular problem has made things difficult for me. See Eq.(7) of the attached file and its subsequent...

09 October 2018 10,082 8 View

Is planetary type motion possible only with an inverse square law type force?

Will there be planetary type motion possible if force varies linearly or cubically with distance? If a body is revolving around another body then can i say with total confidence that the body is...

08 September 2018 8,780 4 View

What is the difference between internal energy and kinetic energy for gases?

Some thermodynamics confusion. Assume ideal gases for simplicity. Are kinetic energy (K) and internal energy (U) for gases, different from one another? As I understand, dU = n Cv dt And if some...

11 December 2017 7,854 98 View

Is Newton's third law applicable to the force of gravitation?

07 August 2017 8,035 11 View

Do vacuum and empty space imply the same?

1) Do vacuum and empty space imply the same? Can they be used interchangeably? 2) If a sealed "empty" box resting on a table is slided to another position, is the space if "encapsulated", also...

02 March 2017 736 12 View

Is there a measurement problem underlying special theory of relativity?

02 March 2017 263 9 View

Physical interpretation of the Navier-Stokes ladder theorem?

07 August 2016 5,931 0 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

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

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

Data Analysis K-S and S-W tests?

Hello, I have conducted analysis where the K-W and S-W have come out as p

25 February 2021 9,648 3 View

Has anyone used the Illumina ITS1 primer sets?

Hi everyone, Illumina provides a list of primers to amplify with high taxonomic coverage the ITS1 region for further fungal sequencing, but I cannot find the exact amount necessary of each...

25 February 2021 6,969 3 View

Statistics: include groups of respondents made by one person for analysis?

Good morning, I could not find literature about this so I am asking. I am organizing data for a questionnaire (N=100) that foresees some personal questions like level of education. For the aim...

25 February 2021 2,090 4 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

Standard curve shifting over time. How do I stabilise the ELISA?

24 February 2021 1,365 3 View

How does the injection volume impact LLOQ and ULOQ in regression analysis (LC-MSMS)?

Hello, I have run into an issue that has sparkled a debate at work: is the LLOQ/ULOQ impacted by injection volume under the following circumstances: 1) Same dilution factor of all samples 2)...

23 February 2021 9,159 3 View