Density functional theory ( DFT ) methods are often considered to be ab initio methods for determining the molecular electronic structure, even though many of the most common functionals use parameters derived from empirical data, or from more complex calculations.

By 1978 Parr had realized that Density Functional Theory ( DFT ) would be extremely useful in quantitative calculations of chemical and biological systems, especially those with high molecular weights.

In " Lisa's Date With Density ", Nelson kisses Lisa, only to be berated by Jimbo, Kearney, and Dolph, who believe that kissing girls is " gay " ( Despite the events that occurred revolving around Jimbo in " New Kid On The Block ").

In excited states, chemical reactions or when a more accurate representation is needed, electronic behavior can be obtained from first principles by using a quantum mechanical method, such as Density Functional Theory.

At increased Density Altitude, for the same given indicated airspeed the aircraft's true airspeed ( TAS ) will be higher, but the same indicated airspeed limits ( IAS ) apply.

Density can then be calculated according to a molar form of the original formula:

Density matrices acting on H < sub > A </ sub > only constitute a proper subset of the operators on H < sub > A </ sub > and same can be said for system B.

Density altitude is the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density at the place of observation, or, in other words, the height when measured in terms of the density of the air rather than the distance from the ground.

Density altitude can be calculated from atmospheric pressure and temperature ( assuming dry air ).

Density Separations may be created by printing three prints of the same picture, each at a different exposure time that will be combined for the final image.

Density, Bulk Density, or Wet Density,, are different names for the density of the mixture, i. e., the total mass of air, water, solids divided by the total volume of air water and solids ( the mass of air is assumed to be zero for practical purposes ):

Conversion of Cineon Printing Density ( CPD ) to Status-M can be estimated with a 3x3 matrix or by using tables contained in the Kodak " Digital LAD " document.

The most common reliability parameter is the mean time to failure ( MTTF ), which can also be specified as the failure rate ( this is expressed as a frequency or Conditional Probability Density Function ( PDF )) or the number of failures during a given period.

These may be heuristics-based such as the Extended Kalman Filter or the Assumed Density Filters described in Peter S. Maybeck's book or more methodologically driven such as the projection filters introduced by Damiano Brigo, Bernard Hanzon and François Le Gland, some sub-families of which are shown to coincide with the Assumed Density Filters.

Density is desirable as weights must be as small as possible, in order to minimize visual cues which could drive fish away from a fishing operation.

Density: graphite's specific gravity is 2. 3, which makes it lighter than diamonds.

In 2007 Vagrant formed another imprint label, Density Records, which will release heavier material than has traditionally been released on the label.

The U. S. National Bureau of Standards in 1916 accepted the Baumé scale, developed in France in 1768, as the U. S. standard for measuring the specific gravity of liquids less dense than water ( see: Density of water ).

Barangays Rosario, which includes contested areas between Municipality of Tagoloan and Municipality of Malitbog, Bukidnon and Sta Cruz, occupy relatively bigger areas ( 11. 2 %) than the other nine barangays. The Gross Population Density of Tagoloan in 2004 is 650 persons per square kilometer.

Allmusic's Sean Hickey says, " According to the composer, Density 21. 5 is based on two melodic ideas — one modal, one atonal — and all of the subsequent material is generated from these two themes.

In the early 1990s two high-density optical storage standards were being developed: one was the MultiMedia Compact Disc ( MMCD ), backed by Philips and Sony, and the other was the Super Density disc ( SD ), supported by Toshiba, Matsushita and many others.

C < sub > 60 </ sub > with isosurface of ground state electron density as calculated with Density functional theory | DFT

Density functional theory ( DFT ) is a quantum mechanical modelling method used in physics and chemistry to investigate the electronic structure ( principally the ground state ) of many-body systems, in particular atoms, molecules, and the condensed phases.

* Density: 22. 798 Phones / 100 Hab

Most quantitative calculations in modern quantum chemistry use either valence bond or molecular orbital theory as a starting point, although a third approach, Density Functional Theory, has become increasingly popular in recent years.

Density functional methods and semi-empirical methods are variants on the major theme.

So by reducing the number of tracks used and thus capacity, it was possible to further reduce cost-in contrast to Double Density drives used e. g. in IBM PC computers of the day which saved 180 kB on one side ( by using a 40 tracks format ).

“ Varèse: Ionisation ; Density 21. 5 ; Intégrales ; Octandre ; Hyperprism ; Poème Electronique.

* Electric Dipole Potential by Stephen Wolfram and Energy Density of a Magnetic Dipole by Franz Krafft.

Density is an intensive property in that increasing the amount of a substance does not increase its density ; rather it increases its mass.

Density of loading refers to the mass of an explosive per unit volume.

Density was checked as development was occurring.

Density of ice increases slightly with decreasing temperature and has a value of 0. 9340 g / cm³ at − 180 ° C ( 93 K ).

Density and temperature of plasma in the magnetosphere and other areas of space.

Density increases upwards, temperature increases towards the right.

: Density operators are those that are in the closure of the convex hull of the one-dimensional orthogonal projectors.

In 1989 he and Yang published Density Functional Theory of Atoms and Molecules, now considered the basic textbook on DFT.

* Density of mobile subscribers: 105. 12 per 100 inhabitants

Density is highest in the southwest where Colombo, the country's main port and industrial center, is located.

Density varies from 1 person per square kilometre ( 3 per sq.

Density and vesicularity ( gas bubbling ) of the volcanic products in question is not taken into account.

: See Density for a table of the measured densities of water at various temperatures.

Density at minimum cost per transistor.

Density contrasts between different sedimentary layers, such as between sand and clay, can result in flame structures or load casts, formed by inverted diapirism.