How to find Lyapunov Exponent for a non-linear time series in R/Python?

I am working on a project where I am using chaos theory to check if chaos is there in non-linear time series and use it for a neural network model. We need two parameters for finding chaos (using...

29 October 2020 3,289 3 View

Is there any other fluorescence dyes which can be used to stain bacterial cells like SYTO9?

Fluorescent staining and further microscopy is a powerful tool in studying microscopic strictures. Are there any other dye systems available that can stain bacterial cells as SYTO9 does?

08 April 2020 9,038 7 View

Can PFM phase image be useful to extract multi-state polarization level of ferroelectric thin films?

I want to polarize my ferroelectric PVDF-TrFE thin films in different directions and probe it using PFM. I know that PFM phase can read either 0o or 180o. Can it read any other orientation in...

05 March 2020 4,883 3 View

Why do some researchers consider "damage parameters" in concrete while others do not?

I have been reading a few papers related with the non-linear finite element analysis of RC beam under static loading, in Abaqus using CDP model. So far, I have found that some researchers use...

20 May 2019 469 4 View

Can anyone suggest an apparatus for measuring vibration of washing machine drum experimentally ?

Washing machine drum vibration - rotating drum - equipment for measurement

06 September 2018 7,671 3 View

Are there any ways to provide constraint between a 3D-Solid node(or Surface) and a 2-node (truss or beam element) in ABAQUS?

Consider a rebar welded on a base plate and load is applied on the lateral direction. Can you suggest some ideas to constraint the end of the rebar with the base plate in ABAQUS ? The attached...

22 April 2018 2,843 3 View

Additives for decreasing the thermal conductivity of polyetylene foams?

I am looking for additives/filler to decrease thermal conductivity of cross linked closed cell polyethylene foams? please advise me what kind of fillers I can use for my research purpose.

13 December 2017 1,489 3 View

What information can we get from the Exchange stiffness constant of ferromagnets?

12 April 2017 6,738 5 View

XRD phi scan of thin film substrate shows split peaks?

When I do a phi scan about the substrate peak, the phi scan peaks seems to be split or shows multiple peaks at the same value of Phi. And also omega scan about the substrate peak give multiple...

28 March 2017 9,580 3 View

Isolation of endophytic bacteria

What is the best method for isolation of endophytic bacteria from tuber (underground) portion of plant and hard plant part?

04 January 2017 3,596 7 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 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

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 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

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

No streamlines present in a small region inside a flow. This means exactly what?

No streamlines present means whether the flow is getting obstructed there and the velocity inside the region is zero? Or else, the fluid is trapped inside that region with a nonzero velocity?...

22 February 2021 5,249 10 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

How do I collect online measures in a same-different task?

The same-different task requires to subjects to indicate whether a pair of stimuli seen or heard are the same (say AA or BB) or different (say AB or BA). Researchers often collect offline measures...

20 February 2021 9,226 2 View