Results 251 to 260 of about 779,578 (304)

Neutral Density Revisited

open access: yesDeep Sea Research Part II: Topical Studies in Oceanography, 1999
Abstract The possibilities of defining and computing an approximately neutral density variable are reexamined in this paper. There are three desirable properties that a neutral density variable should possess. Firstly, the isosurfaces of this variable should coincide with (approximately) neutral surfaces.
Carsten Eden, Jürgen Willebrand
core   +4 more sources

Absorption and fixation times for neutral and quasi-neutral populations with density dependence

Theoretical Population Biology, 2008
We study a generalisation of Moran's population-genetic model that incorporates density dependence. Rather than assuming fixed population size, we allow the number of individuals to vary stochastically with the same events that change allele number, according to a logistic growth process with density dependent mortality. We analyse the expected time to
Todd L Parsons, Joshua B Plotkin
exaly   +5 more sources

The material derivative of neutral density

open access: yesJournal of Marine Research, 2005
An expression for the rate of change of neutral density following a fluid parcel (the material derivative) is derived and checked numerically. This expression can be used to quantify the degree to which neutral density varies even under purely adiabatic ...
Trevor J. McDougall, David R. Jackett
openaire   +3 more sources

The Materiality and Neutrality of Neutral Density and Orthobaric Density

Journal of Physical Oceanography, 2009
Abstract The materiality and neutrality of neutral density and several forms of orthobaric density are calculated and compared using a simple idealization of the warm-sphere water mass properties of the Atlantic Ocean. Materiality is the value of the material derivative, expressed as a quasi-vertical velocity, following the motion of ...
Scott R. Springer, Roland A. de Szoeke
openaire   +1 more source

The density dependence of neutral hydrogen density and neutral hydrogen emission from PLT

Journal of Nuclear Materials, 1987
The efflux of atoms with energies greater than 10 eV from tokamaks results primarily from charge exchange. This flux is useful as a diagnostic of plasma properties such as particle transport, particle confinement, power balance, neutral density, and ion temperature.
D.N. Ruzic, D.B. Heifetz, S.A. Cohen
openaire   +1 more source

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