What would be the appearance of different colors below the ultraviolet and beyond the infrared?

There is an infinity of colors below purple and beyond red, but what would be their appearance if we could "see" them?

11 December 2017 8,217 6 View

"Publish or perish" seems to be the slogan "in vogue", but is there another emergency exit ?

People have to publish in a factor impacted journal, but the must high quoted ones hardly accept non experimental works. What have a pure theorician to do, then in order to overcome this difficulty ?

01 February 2017 5,037 1 View

If none of the Shockley and Queisser suppositions were necessarily true, how could we significantly improve their limit?

The analysis of Shockley and Queisser relied on hypothesis that only one electron-hole was created per incoming photon, there is a thermal relaxation of the electron-hole pair energy in excess of...

01 February 2015 5,754 2 View

Could we make very efficient optical waveguides on semiconductors ?

We have previously developped a theoretical optical waveguide using a III-Nitrides substrate, but we nevertheless didn't find a lot of literature about this kind of waveguides.

31 December 2014 3,878 4 View

In Schottky diodes, how could we explain, physically, the barrier inhomogeneities ?

In Schottky diodes appears at metal/Semiconductor interface some inhomogeneities in the barrier.

11 December 2014 3,006 5 View

Why don't we use specific bacterias to produce hydrocarbons from atmospheric carbon dioxide ?

There are, like superior plants, a lot of species of bacterias which could use atmospheric Carbon Dioxide to make hydrocarbons, so why don't we investigate this way of resolving the fateful...

11 December 2014 645 1 View

Why is that the best band gap of a solar cell is in the region of 1.5 eV?

In several papers I found that the optimized band gap for solar cells is close to 1.5 eV. This value corresponds to a wavelength of about 830 nm, in infrared. Is it due to the fact that we use...

11 December 2014 1,362 18 View

If the polar ice caps would melt more, resulting in an erection of the underlying landmasses, would this not accelerate the elevation of sea levels?

The polar ice caps rely on continental masses sinking them into the earth's crust. If the ice melts quickly, did it would not occur a sudden acceleration of the sea level elevation (estimated at...

07 August 2014 8,932 6 View

Could the atmosphere reflect more sun radiations since the GHGs concentration has risen?

Since the Greenhouse Gases concentration has greatly augmented, could the climate changing be counterbalanced by reflecting more solar radiations like a volcano with its ashes cloud can do?

06 July 2014 4,055 15 View

How can we explain the barrier height inhomogeneity in Schottky contact?

Some researchers proposed to use gaussian. What about other solutions?

02 March 2014 7,915 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 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