NCRB is an Indian government agency responsible for collecting and analysing crime data as defined by the Indian Penal Code.
It is part of the Ministry of Home Affairs (MHA) and headquartered in New Delhi.
The MHA has entrusted NCRB with a renewed mandate for the Crime and Criminal Tracking Network and Systems (CCTNS) Project connecting around 12800 police stations to allow search for a criminal / suspect on a national data base.
NCRB also compiles and publishes National Crime Statistics i.e. Crime in India, Accidental Deaths & Suicides, Prison Statistics and Finger Prints.
Time crystals
They are hypothetical structures that have movement without spending energy i.e they appear to have movement even at their lowest energy state, known as a ground state.
Normally, the atoms of crystals are arranged in orderly 3D patterns that repeat within space.
But in time crystals atoms are arranged in patterns that repeat in time as well.
So the atoms would be moving at a certain rate and never settle to a thermal equilibrium i.e they will remain in a non-equilibrium phase.
This ability violates a fundamental symmetry in physics called time-translation symmetry i.e the laws of physics must work in the same way in all places and all times.
Recently two separate teams of physicists described ways of actually creating such structures.
Being able to create them would mean a leap forward in creating quantum computers i.e a computer which makes use of the quantum states of subatomic particles to store information.
Superfluids
Superfluids are fluids with zero viscosity i.e they flow without loss of kinetic energy.
When stirred a superfluid forms cellular vortices that continue to rotate indefinitely.
Superfluidity occurs in two isotopes of helium (helium-3 and helium-4) when they are liquified by cooling to cryogenic temperatures.
