May bifurcation diagrams exhibit the parameter "time" on the x-axis?

When plotting a bifurcation diagram in nonlinear dynamics, the axis x displays a given phase parameter. Are there examples in which the phase parameter stands for time passing (for example, from...

11 December 2018 787 11 View

Connectome, oscillations, free energy, phase transitions and so on: did anybody ever try to put all the brain theories in a coherent framework?

further...

01 January 1970 8,155 5 View

How many dimensions are there in brain activity?

A donut-like torus may be compared with a video game with biplanes in aerial combat: when a biplane flies off one edge of gaming display, it does not crash but rather it comes back from the...

01 January 1970 686 4 View

Is the Klein j-invariant (or j-function) a fractal?

Some modular functions, such as the Riemann zeta one, display a fractal behaviour. Does also the curve of the j-function display power law properties, or a scale free structure? It it feasible...

01 January 1970 3,538 8 View

In Einstein special and general relativity, does the mass change, depending on the observer's standpoint?

Read 115 answers by scientists with 85 recommendations from their colleagues to the question asked by Arturo Tozzi on Feb 25, 2017

01 January 1970 9,484 82 View

Where is the neural code? just in spikes?

01 January 1970 6,976 11 View

The retina contains L cones, M cones and S cones: when they are activated, do they fire with the same frequency?

01 January 1970 1,355 13 View

Kuramoto oscillators: am I allowed to use the parameter "noise" in the way described below?

https://www.researchgate.net/publication/279416789_A_DIFFERENT_ROLE_FOR_NOISE_IN_BRAIN_OSCILLATORS

01 January 1970 4,059 0 View

Changes in probability p lead to changes in Shannon's entropy E. Is the reverse true? If I hypothetically change E, may I obtain a change in p?

01 January 1970 5,178 14 View

Transcranial stimulation: is the role of fractals in the waveforms underestimated?

We suggest that the techniques of transcranial electrical stimulation need to be keept into account, along with the amplitude and frequency of the applied waveforms (Reato), and also their scaling...

01 January 1970 2,014 10 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

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 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

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

Can anyone help with an Accurate Diffuser Expansion Loss formula for rectangular shaped diffusers in turbulent flow regime?

I have tried Idelchik's Handbook of Hydraulic Resistance 4th Edition (2007 page 300) formulas and across some range the formulas are reported valid for, the law of conservation of energy is...

20 February 2021 2,504 1 View

How to predict the reaction pathway for electro organic synthesis?

Can anyone recommend some any software/models available that can predict substance reactivities and the reaction yield under a specific set of reaction conditions process and proposing pathways to...

17 February 2021 2,383 3 View

How to visualize stress in a coating defined by "Skin" in Abaqus?

Hello All! I'm trying to model a contact between a coated substrate and a tip in Abaqus. The coating is ultra-thin compared to the geometry of the substrate. So I defined the coating using the...

16 February 2021 1,594 3 View