Is anyone aware of any electromagnetic field equations that would generate an image such as this?

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Would a device that harvests energy via a dissipative structure qualify as a Prigogine Machine?

Also, would a device that processes information via a dissipative structure qualify as a Prigogine Machine?

02 March 2016 6,942 4 View

Would you agree that P -> NP as v -> c?

The notation " -> " reads as "approaches". If we give each Twin in the Special Relativity Paradox a computer, the traveller can see the stationary computer complete a very long NP calculation...

08 September 2015 1,336 7 View

The length of non-stop nsDNA is about 5 to 10 times longer in communal bacteria than pathogens. Half the nsDNA is paired. Have I missed a reference?

I have an observation and a correlation that is strong enough to present in a preliminary and semi-quantitative form before the full study ends. If one calculates the distance in nucleotides...

07 August 2015 3,397 2 View

How rare is it for a sparse rectangular matrix to have an exact solution?

By "solution", I mean a PseudoInverse. By "exact", I mean a formula, not a fit (such as SVD) or a decomposition.

10 November 2014 2,687 3 View

Is bubble memory loss of daily events common for a mathematician heavily involved in work?

I'm sort of grinning as I ask this question: It might get me off the hook with my wife!

10 November 2014 7,227 1 View

In formal mathematical terms, what is the most succinct statement of the P v NP problem?

It would be nice if the text defined all operators.

10 November 2014 2,167 1 View

Has anyone run code on the 156,000 node Amazon computer?

http://aws.amazon.com/

09 October 2014 8,664 2 View

What is the most direct evidence that the speed of light is invariant in all reference frames?

Be careful that your answer is not using indirect or secondary observations.

09 October 2014 6,257 4 View

Does anyone recognize this SVD shortcut as a known equation?

(* complete dictionary of words, one per row, number of rows is (alpha^word), using words of length "word" and an alphabet of "alpha" number of characters *) alpha = 4; word = 3; dict =.; dict =...

09 October 2014 9,282 3 View

What do you think the odds are for finding an alternative genetic code in an environmental metagenomics library?

Don't be shy to answer. I'd really like to know what people think!

09 October 2014 5,524 0 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Is it possible to use the Fused Deposition Modeling (FDM) to additively manufacture interconnected porous structure generation of >100-200 micrometer?

Usually, additive manufacturing techniques like SEBM, SLS, and SLM are used for interconnected porous lattice structure generation with sizes of >100–200 micrometers. Can the Fused Deposition...

09 August 2024 7,892 0 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How to increase simulation box size?

We intend to study the interaction between peptides and polymer (like PP, PE and PS) through MD simulations using Martini force fields ( Martini 2 for PP and Martini 3 for PE, PS). We have...

08 August 2024 4,842 0 View

Can you suggest reliable sources defining "3D mesh" and "3D city models"?

Dear fellow researchers, I am currently working on a paper where I need to provide a reliable reference that defines and distinguishes between 3D mesh models and 3D city models. Although I am...

06 August 2024 9,986 2 View

Please explain how the plastic input value should be considered from the true stress-strain curve for the bilinear elastoplastic material model ?

I am working on Abaqus/Explicit(Quasistatic ) for the deformation of the auxetic structure model. Please explain how the plastic input value should be considered from the true stress-strain curve...

05 August 2024 454 3 View

What are the shear and normal stiffness values of an LLDPE liner in 3D numerical modeling of a stockpile?

I am seeking experimental or applicable data for the liner (LLDPE) interface in FLAC3D numerical modeling of a large stockpile. Could you please recommend suitable references? The preferred data...

05 August 2024 3,665 0 View

Is it necessary to covary exogenous constructs in a structural model?

I am working on a SEM model where i have 7 latent variables (6 exogenous and 1 endogenous). In AMOS when I co-vary the exogenous constructs, only 2 paths are coming significant out of 6. But when...

03 August 2024 6,028 4 View