Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What is the most reliable source to get Impact factor of journals?

Source to get Impact factor of journals

01 March 2021 6,654 2 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Why is the efficiency of viral mRNA electroporation in PBMC low?

Hello, I have been struggling with the electroporation of PBMC with HIV-I mRNA. Although the quality of the RNA generated is good, and the handling of the cells in meticulous, the frequency of...

27 February 2021 9,233 3 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

Have anyone checked before Cyclic voltammograms of intial ITO substrate and E-teck?

As a beginner in electrochemistry, I tried to obtain cyclic voltamograms of commercial anatase powder deposited on an ITO substrate or on Eteck. After several attempts, I noticed that my cyclic...

23 February 2021 3,175 3 View

Best FE Program for Concrete Strengthened with FRP Sheets?

Colleagues, I have been using ANSYS to model concrete strengthened FRP sheets, but less than happy with it. Any has recommendation for efficient, easy to use FE program for modelling concrete...

22 February 2021 7,528 3 View

The type of filter paper used to filter an epoxidized oil (the mixture is an epoxidized oil with magnesium sulfate) ?

I have a mixture of epoxidized oil and magnesium sulfate wich type of filtre paper should i use

21 February 2021 3,944 3 View

Any information about dinitrosalisylic acid reagent end point color stability ?

I work on estimation of alpha amylase activity using dinitrosalisylic acid reagent If i put the reagent to stope the enzymatic reaction and allow the reagent to react with the produced reducing...

17 February 2021 7,402 4 View

If you haven't computer? how you show the photons to pupils?

Educational Process

01 March 2021 1,827 1 View

What is the structure of a photon that can describe the interference experiments that reject the wave nature of light?

De Broglie's double-solution postulated a causal model of Quantum Mechanics. Knowledge of the photon structure was needed to model the particle part of the cause of the Double Slit interference...

11 February 2021 6,869 5 View

What kind of detector is used in the double slit experiment to determine through which slit the photon or electron passes?

Explain exactly what the detector does and if the choice of detector affects the outcome. Einstein and Bohr had some discussions on this. What's the current situation?

29 December 2020 1,984 5 View

How much does radiative heat transfer effect thermal conductivity of materials and how to compare calculations to experirment?

I am calculating the phonon contribution to thermal conductivity for 4 perovskites (BaZrO3, BaSnO3, BaHfO3, and KTaO3) with relatively wide bandgap. When I compare my results for BaZrO3 to the...

27 December 2020 3,232 3 View

Can photons curve the spacetime and how would you measure this effect?

Mass bends spacetime. It's generally accepted that the photons have no mass, but they do have momentum and energy and can cause pressure, so they have equivalent mass of p/c. The...

14 December 2020 3,195 6 View

Are there definitive rules or conditions for the creation of a quantum mechanically entangled state?

Are there some (simple) rules or conditions which dictate whether a physical process will lead to a state of quantum entanglement of two or more particles or systems? Given the relevance of the...

13 December 2020 7,590 3 View

What is virtual photon field , how is it helpfull to explain the Lamb shift on hydrogen atom ?

It is known that the Lamb shift is the consequence of the interaction of the electron with its virtual photon field. What is the meaning of virtual photon field? And how is it helpful to explain...

03 December 2020 535 3 View

What are the latest (theoretical) understanding of self-interference (in double-slit exp)?

In 1967 R. L. Pfleegor and L. Mandel, Phys. Lett. 24A, 766-67 proved experimentally the self-interaction of photon through double slit. Well, some said it is even later until 1986 by Grangier et...

19 November 2020 2,378 11 View

Number of photons in a cavity?

I am trying to interpret the following statement: A microwave tone at 7.684 GHz and power -130 dBm coherent with a cavity corresponds to about 3 intracavity photons. How can I get 3 photons from...

11 November 2020 4,787 11 View

How do you deal with massless particles in SR, since they can't have four vectors?

Suppose a photon is observed to have some three velocity v in an inertial frame O, another inertial frame O' is moving away from O with another three velocity u. Is there a general way to get the...

10 October 2020 5,132 3 View