HF

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HFHalf
HFHigh Frequency (3-30 MHz; 100-10m)
HFHeart Failure
HFHydrogen Fluoride
HFHalf Life (game)
HFHedge Fund
HFHandsfree
HFHafnium
HFHigh Fidelity
HFHave Fun
HFHigh Functioning
HFHot Fix
HFHartree-Fock
HFHarrison Ford
HFHarvest Festival (various organizations)
HFHolland Festival (est. 1947)
HFHarbor Freight
HFHalogen Free
HFHyperfiltration
HFHistorisk-Filosofiske Fakultet (Department of Arts, University of Oslo, Norway)
HFHellfire (antiarmor, laser guided, air-to-ground weapon)
HFHeritage Foundation
HFHuman Factor(s)
HFHyperfine
HFHack Forum (anime)
HFHip Fracture
HFHigh Five (internet gaming)
HFHorizontal Flight (aviation)
HFHemorrhagic Fever
HFHappy Face
HFHlutafelag (Icelandic corporate designation)
HFHelicopter Flight
HFHuck Finn (book)
HFHot Finish (steel)
HFHigh Force
HFHeroic Fantasy
HFHard Failure
HFHyper Fighting (Street Fighter: Hyper Fighting game)
HFHydroflouric (Acid)
HFHageman Factor
HFHome Fleet (British, WWII)
HFHeight Finder
HFHuman Failure
HFHydrogen Fill
HFHabitat Fragmentation (conservation biology)
HFHazard Function
HFHapag Lloyd Flug (IATA airline code)
HFHázi Feladat (Hungarian: homework)
HFHidden Frontier (Star Trek internet-based fanfilm)
HFHaze Filter
HFHeight-Finding (radar)
HFHorizontal Fusion
HFHigh Forage
HFHyperfile
HFHonda Foundry Co., Ltd. (Japan)
HFHarlequin Fetus
HFHarassing Fire
HFHormone Foundation
HFHabbo Forum
HFHarmony Foundation
HFHydro Foil
HFHonor Farm (Alabama prison program)
HFFailed in the House (defeated business of the House of Representatives, North Carolina)
HFHazards Forum
HFHellforge (gaming, Diablo 2)
HFHouse Forsaken (gaming guild)
HFHandling Fixture
HFHammer Forum
HFHydraulfunktion (Swedish electrohydraulics manufacturer)
HFHomeLAN Federation (gaming administrators)
HFHinkle Fieldhouse (Indiana)
HFHemochromatosis Foundation
HFHarrier Force
HFHazard of Failure
HFHead Foreman
HFHybridization Factor
HFHolmesdale Fanatics (football ultras group)
HFHoly Fudge (polite form)
HFHousefellow
HFHatof Foundation
HFHostForce
HFHeredes Fecerunt (Latin: His/Her Heirs Made, epigraphy)
HFHeres Fecit (Latin: His/Her Heir Made, epigraphy)
HFHull Fitter
HFHold For/Held For
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References in periodicals archive ?
The most common indication of CRI was device failure in 39 ears (34 ears with hard failure and 5 ears with soft failure) contributing to 73.6% of the total re-implantation.
Hard failures are observed when the product fails to function properly when under stress and does not return to operating normally when the stress is reduced or removed.
For a given network configuration, the protocol can exchange hard failure recovery time with performance costs.
This allows the administrator to control the cluster node in the event of a hard failure and also allows the OS to be managed.
At -30[degrees]C, the controller experienced a hard failure in the lithium battery on the PC104 Card, the controller's computerized core.
Hard Failure: Failure of a product under test that does not revert to correct operation when the test stresses are reduced.
Instead, fabricators always run their "golden" software and fabrication rules against the data to ensure they will produce boards that are not hard failures, and to determine adjustments to avoid soft failures that could decrease production yields.
Rai (business statistics, Wayne State University) and Singh (Rapid Global Business Solutions) present methods for arriving at hazard rate estimates when mileage accumulation rates in the vehicle population are available in the case of hard failures, estimating hazard function when mileage accumulation rate is not available, and addressing bias in warranty data due to customer-rush near the warranty expiration limit.
Six input variables (paste type, wave solder flux, reflow profile peak temperature, wave solder temperature, reflow with nitrogen/air and PCB surface finish) were analyzed against six output factors: number of prior opens (as received), number of soft failures (intermittent during vibration); number of hard failures (persist after HALT); average time to hard failures (for each individual card under test), sum of prior and hard opens (both hard opens); sum of prior, hard and soft opens and the statistical subpopulation (four were recovered).