What is the meaning of writting a comment on a published paper ?

When one writes a comment on a published paper , what is actually the intention of the commenting author ? To point out the mistakes or present complete solution . It is seen that very often...

01 February 2019 6,761 4 View

Can any one suggest how to calculate C when the Hamiltonian neither P nor T invariant ?

[H,P]=/=0;[H,T]=/=0;[H,PT]=/=0; then how to calculate C ? If one take C=0,this implies only zero charge particles exist for this type of H .Mathematically [H, CPT]=0. Or one can tell that...

31 December 2018 8,904 0 View

How to calculate charge operator for a 3x3 complex mayrix ?

Please suggest matrix method for calculating charge conjugation operator. Suppose one desires to apply matrix to study K^0; K^+;K^- . Then how to proceed .

11 December 2018 4,693 0 View

Do you accept parity violation in Quantum Mechanics ?

In my understanding parity is violated in many hermitian operators with susy or without susy . Interestingly hermitian matrix also comes under this P =/= P^-1

09 October 2018 7,523 0 View

How many + and - ve charges in a C(conjugate operator) ?

08 September 2018 603 0 View

Can I have two charge conjugate matrix for given complex matrix reflecting real eigenvalues ?

08 September 2018 2,381 0 View

No title

08 September 2018 8,205 0 View

Why product of two matrices are non-commutative in nature.?

07 August 2018 9,564 4 View

Can you suggest an application on matrix eigenvalue method to Economics or Business ?

Please suggest a suitable problem in Economics or Business where one can apply matrix eigenvalue method ? Give details. B.Rath

07 August 2018 2,805 1 View

Can you suggest some applications of fractional matrix ?

Please read my article fractional matrix and suggest some new applications . B.Rath

07 August 2018 8,197 0 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

Why the nucleic acid gel melted after running for 30min?

Hi all, I proceed with nucleic acid gel electrophoresis recently several times, but a wried phenomenon is they always melted after running over 30min. My gel concentration is 1% percentage...

22 February 2021 9,896 3 View

Online surveys for social sciences researchs: what are your opinions about this tool and how can we improve the research design to incorporate online?

Good morning everyone, Due to the pandemic, I conducted several online surveys. It is quite agile, not at all expensive, but there are several problems: the sample's representativeness and its...

21 February 2021 7,457 3 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