An AC-like system to fight climate change?

Wouldn't it be possible to build a huge air-conditionning-like sytem to evacuate calories from the atmosphere to space, and reduce the atmosphere's temperature?

08 September 2019 1,038 2 View

Is it possible to intercept a time reversal RF communication ?

31 December 2015 6,353 3 View

Does Heisenberg uncertainty principle apply to Higgs boson or should it be adapted?

The Higgs boson seems to be a particule difficult to detect (elusive particle), in this context does the uncertainty principle apply as well as it applies to other less elusive particles? More...

08 September 2014 9,641 8 View

Never ending Big Bang ?

The current theory about Big Bang says that 'normal' matter, as opposed to antimatter, won because something (some say that neutrinos are responsible) happened that broke the balance between...

08 September 2014 8,424 4 View

Any suggestion for a good but easy to understand book about String Theory ?

String Theory seems quite complicated if you don't have enough scientific background in the domain. I tried "Little book of string theory" from Steven S. Gubser, but it lacks some basic...

08 September 2014 5,895 0 View

What are Foster and Non-Foster materials?

I've seen these words in a few papers, related to metamaterials, but never found any explanation nor translation.

03 April 2014 7,086 2 View

Can anyone help with Bruggeman mixing model?

I am using mixing models to calculate effective parameters (such as permittivity or permeability) of mixtures, i.e. inclusions with a given volume fraction in a host medium. There are several...

02 March 2014 6,387 11 View

Does a moving magnetic field generate a current?

Supposing a constant or time varying magnetic field H, moving at the constant speed V at a distance d along an electric wire or a pair of parallel electric wires. Does this generate a current in...

01 February 2014 8,777 12 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

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 View

Does any one know how i can prepare liver tissue with transmission electron microscope with good fixation?

i have problem in preparation of liver tissue with bad cell organelles and how i can adjust osmolarity

03 March 2021 8,890 1 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 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

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 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

SEM or Multiple Regression for an analysis without Latent Variables?

Hello, I have three hypothesis to test, all with the same IV. I am testing if the effect of the IV on the first DV is mediated by awe. I am then measuring whether the effect of the IV on a...

26 February 2021 8,399 5 View