Critical Mass

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Related to subcritical: Subcritical flow
Radiation safety The minimum amount of material—mass of a particular radioisotope—required for it to reach ‘criticality’ and undergo a spontaneous fission chain reaction, releasing a lethal shower of neutron and gamma radiation
Research A popular term for the minimum number of persons working in related fields in a particular place, below which creative thinking and interaction may be suboptimal
References in periodicals archive ?
Discharge coefficient for sharp-crested side weir in subcritical flow.
Kawano urged the Japanese government to file a tough protest with Washington over the subcritical nuclear test.
As thermal reservoir temperature increases, COP of a heat pump decreases but not linearly as seen in subcritical operation.
In order to have subcritical Rayleigh values, one calculate the solution at a Rayleigh value greater than [R.
The terms of the agreement for the wall-fired subcritical and supercritical generators were not disclosed.
Written for physicists and other research scientists in the nuclear energy field, these papers discuss HPPA5 programs and applications in terms of overall reliability, the development of spallation target and coolant technology and subcritical systems designs and simulations.
Our understanding of atherosclerosis has shifted from a focal disease whose hallmark is symptoms caused by a severe stenosis to a systemic disease characterized by endothelial dysfunction (ED) and plaque inflammation, with the potential for rupture and thrombosis mainly in those with subcritical stenosis.
To comply with our sustainable development policy, we use only green processes in all our applications and extraction technologies (water extraction, hydro-alcoholic extraction, oil maceration, floral waters and subcritical water extraction), which are all available on a custom basis.
We say that the function p(x, y) is subcritical for t(z) if p(x, y) is analytic in some set {(x, y) : [absolute value of x] [less than or equal to] [rho] + [epsilon], [absolute value of y] [less than or equal to] t([rho]) + [epsilon]}.
Non-volatile, this gas requires comparatively little energy to reach subcritical or supercritical fluidity.
The state of flow in channels may be subcritical, critical, or supercritical depending on the ratio of inertial to gravitational forces.