Hf

Definitions

  • WordNet 3.6
    • n HF 3 to 30 megahertz
    • n Hf a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
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Century Dictionary and Cyclopedia
    • n Hf A contraction of half.
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Usage

In literature:

Anderson's Royal Genealogies, or the Genealogical Tables of Emperors, Kings, and Princes, from Adam to these times, folio, hf.
"Notes & Queries, No. 42, Saturday, August 17, 1850" by Various
The line FG 6000. and fg 5267. therefore hf.
"Micrographia" by Robert Hooke
Met., last edit., hf.
"Notes and Queries, Number 211, November 12, 1853" by Various
Post 8vo, printed on laid paper and hf.-bd., =2s.= each.
"The Ivory Gate, a new edition" by Walter Besant
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In news:

The ACA.HF Analyzer: The New Standard in Safety, Simplicity and Accuracy for Analyzing HF Catalyst.
It is possible to transit some areas of Gander Oceanic Airspace with only VHF, but in some cases HF is required.
Getting and Installing an HF Beam.
The Xantrex Freedom HF inverter -charger is offered as an option by major truck manufacturers.
Koch Membrane Systems Inc will introduce Targa II HF, a new hollow-fiber ultrafiltration membrane system, in June at American Water Works Association's annual ACE11 conference.
We plan on having HF and vhf/uhf soon.
In aviation's early days, long-distance HF communications used wire antennas trailing behind the aircraft.
HF Financial is partnering with the Charlotte Zoological Park's Think Recycling program to keep electronics and business waste out of landfills.
She and Sagacious HF made waves at the Dressage at Holiday and Horses in Wellington, Fla.
Aircraft Without HF Concern Gander ANS.
Study presented at ESC may offer new diagnostic measure for HF.
Despite several notices sent to Hockey Federation over a long span of time HF has not been able to pay the water bills to KW&SB for last 15 years.
To those of you who managed to check into the first TALARC HF net last week, thank you.
There was to be a HF station and possibly some other Amateur Radio activities available.
These materials are ideal for use in vehicular collision-avoidance systems, as well as for EMI suppression in a range of applications from HF through millimeter-wave frequencies.
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In science:

Lemma 13 When Q : (L∗)i → L is continuous, then the fol lowing are equivalent. (1) ∀f ∈ (L∗ )i , x ∈ Im Q , hf , xi ≥ hf , Q(f )i (2) ∀f ∈ (L∗ )i , x ∈ Im Q \ {Q(f )} , hf , xi > hf , Q(f )i (2) ⇒ (1) is trivial.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
L∗)i , x ∈ C ⇒ hf , xi ≥ hf , Q(f )i (2) f ∈ (L∗)i , x ∈ C, x 6= Q(f ) ⇒ hf , xi > hf , Q(f )i. (2) ⇒ (1) is trivial.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
L∗)i and x ∈ C such that x 6= Q(f ), hf , Q(f )i ≥ hf , xi.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
By the hypothesis, hf , Q(f )i = hf , xi. y , f (λ) and x(λ) are defined as follows: for λ > 0, y := x − Q(f ), f (λ) := f − λg (y ), x(λ) := Q(f (λ)) − Q(f ).
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
Because X is x-independent the averages hf (X )i or hf ( ¯X )i are all in flavor space and well-defined.
Generalized heat kernel coefficients
The width of the fluidised region hf is typically given by hf ≃ H ˙Γ/ ˙γ ∗ , with ˙γ ∗ defined here above (small boundary effects neglected).
A simple model for heterogeneous flows of yield stress fluids
If f is a function on the whole set Y, we write hf in instead of hf |Yn in .
Kerov's central limit theorem for the Plancherel measure on Young diagrams
Given a “test” function f on D0 , let hf , ¯Mni denote the result of pairing between f and M n : hf , M n i = Xλ∈Yn f (¯λ( · ))Mn(λ).
Kerov's central limit theorem for the Plancherel measure on Young diagrams
HF (r) = Xi,occ where ϕi (r) ≡ hr|ii refers to the HF wave functions (4), are shown in Fig. 1 for the N = 2 system.
Symmetry breaking and the random-phase approximation in small quantum dots
Using the standard notation we refer to particle states (unoccupied HF orbitals) by subscripts m, n and to hole states (below the HF Fermi level) by i, j .
Symmetry breaking and the random-phase approximation in small quantum dots
Right scale corresponds to the occupation numbers of the HF hole state (solid symbols) while left scale indicates the ground state energies in HF (circles), RPA (squares) and exact solution (triangles).
Symmetry breaking and the random-phase approximation in small quantum dots
The above discussion can be easily extended to obtain the expectation value of any 1-body operator such as, e.g., the particle density ˆρ(r) = Xαβ where indexes α and β run over all the HF set of orbitals and ραβ (r) = ϕ∗ α (r)ϕβ (r) (with ϕα the HF wave functions).
Symmetry breaking and the random-phase approximation in small quantum dots
They established the mapping by pro jecting the Hamiltonian of the BLQH onto the Lowest Landau Level (LLL) and then using subsequent Hartree-Fock (HF) approximation and gradient expansion ( called LLL+HF in the following ).
Mutual Composite Fermion and composite Boson approaches to balanced and imbalanced bilayer quantum Hall system: an electronic analogy of the Helium 4 system
Next, define HF (Ui ) to be the height of Li in TF , and extend it by continuity on [0, 1] (which is a.s. possible according to [2, Theorem 15]) to obtain HF .
The genealogy of self-similar fragmentations with negative index as a continuum random tree
In fact, one can define ˜HF (Ui ) = Li and extend it by continuity on TF , in which case ˜HF is an isometry between TF and ((0, 1), d)/ ≡ that maps (the equivalence class of ) Ui to Li for i ≥ 1, and which preserves order.
The genealogy of self-similar fragmentations with negative index as a continuum random tree
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