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Questions related from P. K. Karmakar
It is often felt that "Happiness" is a temporary feature; whereas, "Unhappiness" is a not-so-temporary feature of life. A natural philosophical question now arises towards "Happy life". How can...
03 March 2019 8,441 18 View
We have mind. We are made up of matter. Does matter have its own mind? Do electrons and protons, which are the building blocks of matter, have independent minds to decide the directionality of...
02 February 2019 8,230 3 View
I need good study materials and books on the effects of "tidal force" on self-gravitational cloud collapse. Could you please cooperate?
01 January 2019 8,655 0 View
The constitutive dust grains in astrophysical environments are partially ionized. What should be the most appropriate (effective) form of dust-dust interaction in astrophysical environments? In a...
12 December 2018 6,832 2 View
Can any one simply explain how the Jeans instability is affected by cosmic ray particles? References and suggested readings are welcome.
12 December 2018 5,829 4 View
How is a normal polytrope influenced in the presence of the kappa-distributed constitutive particles?
12 December 2018 5,324 1 View
Astrophysical fluids are nonthermal in nature. Could you please provide a list (preferably, tabular form) of various nothermal distribution laws for the constitutional particles relevant in...
12 December 2018 3,464 1 View
Interstellar space is nonthermal in nature. Can anybody help me in finding all the possible nonthermal realistic particle distribution laws realizable in interstellar space?
11 November 2018 2,874 0 View
There has been a great need of some reference books in our laboratory on the "electrohydrodynamic (EHD) theory" of stellar winds. May anyone help us by suggesting reliable references in this context?
10 October 2018 7,544 0 View
What are the different methods for obtaining analytical solutions of ordinary nonlinear differential equations (LEEq, reduced KdV, etc)? Aim is to compare the efficiency and reliability of...
08 August 2018 6,837 0 View
What is the main justification behind using the Coriolis force in 1-D stability analysis of self-gravitating astrophysical fluids? Books and reports are welcome as guides.
07 July 2018 7,485 0 View
It is widely believed that the star formation rate (SFR) is affected by the background cloud magnetic field (B). Can anybody suggest a good book or report relating the SFR and B in detail?
07 July 2018 1,157 0 View
I am well familiar with "surface plot", but not so with "density plot" in Matlab. Is there any simple technical way or command to convert "surface plot" into "data density plot" directly in...
07 July 2018 5,684 2 View
I have a philosophical query in mind. It is in search of happiness. Is there any mathematical expression for "happiness" and "mental peace" in terms of other characteristic properties, such as...
07 July 2018 4,118 0 View
How do we derive the mathematical condition (on the system size and angular wave number) for the plane-wave approximation?
07 July 2018 8,304 3 View
Can anyone summarize the basic differences between the usual (with no correction prefactor in the front of the Bohm potential) Quantum Hydrodynamics (QHD) and modified (with a...
07 July 2018 265 1 View
The universal reliability of the Bohm criterion for plasma sheath may indeed be found questionable as per the various existing reports. I am interested in some realistic situations where the Bohm...
07 July 2018 3,456 0 View
As far as seen, the usual Debye shielding mode ignores the test particle dynamics. I am interested in the usual (fluid) model of the Debye sheath for moving (non-static) object. Any suggestion...
07 July 2018 6,319 2 View
As per the usual tradition, the mass of a classical object is taken as a "positive quantity". It can, however, be known to be "negative" as well in reality. My query is of a basic type. What are...
07 July 2018 1,032 6 View
The electrostatic Coulomb law has a number of demerits. Based on it, we semi-classically derive the Bohr atomic theory. Therefore, a natural question arises in fundamentality. How much is the Bohr...
06 June 2018 3,627 6 View
Hello, RG Colleagues! Greetings! I have a peculiar philological question as follows. How to know whether what one says, irrespective of matter, is true? Is there any scientific sort of...
01 January 1970 6,014 2 View
Can anybody suggest the most accurate laws dealing with grain mass distribution in naturalistic astrospace? Papers, books, or chapters dealing with the diversified forms of grain-mass...
01 January 1970 5,806 0 View
The terminology "best method" is a confusing word, because I think, in what context it is physically quantified, is very relevant. One of the efficient methods, however, for your own case of the...
01 January 1970 7,580 0 View
It is often said that "Homeopathy" is the science of gentle and safe healing. What is your opinion in this matter on "Homeopathy"?
01 January 1970 2,225 4 View
Primordial universe is a complex system of plasma, radiation, etc. May we get a plasma model of the primordial university?
01 January 1970 9,629 0 View
It is intended to initiate an interactive discussion to widely spread "Happiness" in the world.
01 January 1970 9,218 40 View
Everybody wants "success", none wants "failure". In reality, "success" is an extra bit over "failure". I, in this backdrop, would like to invite our respected learned RG Friends and RG Colleagues...
01 January 1970 3,258 101 View
Life is a complex system. It is a Nonlinear Dynamics due mainly to its unpredictability. Its colour is a dynamic variable. Different people have different slogans for life. In this backdrop, I...
01 January 1970 3,265 4 View
I want put a fundamental question on the collective dynamics in the fluids of electrically charged particles. What is the basic physics responsible behind the origin of viscoelasticity in the...
01 January 1970 7,664 0 View
