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Related to absorptance: transmittance
AcronymDefinition
AArea
ABlood Type
AActivity
AApproved
AAccommodation
ABattery Size
AAtomic (as in A-bomb)
AAmpere
AAccusative
AUSDA Grade for Dairy Products and Eggs
AAbout
ATo (Spanish, or from Latin ad)
AAdult
AAre (unit of area)
AAmateur
AYear
AAss
AAccount
AAction
AAdvanced
AIndividual (IRB)
AAdvanced Digital Audio (filename extension)
AFirst in Series (chemistry)
AAway (Sports)
AAuthor
AAssociation
AAsk
AActive
AExcellent (scholastic grade)
AAmerican Bank Note Company (numismatic/philatelic)
AAnna
AAnswer
AArticle
AAccept
AAvailability
AAustria (international car index mark)
AAgency
AAdministration
AAdd(ed) (action code)
AAnnual
AAnalysis
AGMT + 1 hour
AAdvanced Levels (highest level of academic boards, UK)
AAssist (Sports)
AAttack (US military aircraft designation, as in A-10)
AArmy (in combinations only)
AApple
AAgreed To (that an amendment or other matter was approved; US House)
AArmy
AAnonymous
AMass Number (physics)
AAustralian
AAcademy
AAbsolute (degrees Kelvin)
AAnalysis and Assessment (LANL)
AAlpha
AAce
AAutomobile
AAssembly Source Code (Macintosh filename extension)
AAfternoon
AAce (used on playing cards)
AAlto
AAnno
AAnchor (HTML)
AAnalog
AAircraft
AAnalog Signal
AAdjacent (to a carboxyl group; chemistry)
AAqua
AArc
AAtomic Mass
AAggressive Personality Type
AAnnually
AAnterior
AAcre
AArctic
AAnte (Latin: Before)
AAft
AApplet
AAirplane
ASpecific Optical Rotation
AAlgemeen
AArse
AAerial
AAbsent
AAnd
ANewfoundland/Labrador (Canada Post designation)
AAvance (French: fast)
AAllegro (game programming library)
AAlpha Particle
AAuditor
AAtto-
AAcceleration
AAdultery (as in the Scarlet Letter)
AAcronym
AAbbreviation
AArtillery
AArtery
AFirst Substrate
AAmphibian (aircraft type)
AArterial Road (used with road numbers)
AAt or Above (constrained altitude)
AArterial blood
ASpecific Absorption Coefficient
AAirbus
AAmplitude
AAdjective
AArgon
ATotal Acidity
AAsymmetric
ARetinol (vitamin)
AAccumulator
AAutostrada (Italian notation for highways)
AAirman
AAdjutant
AAnode
ASmooth, Paintable (American Plywood Association Veneer Grades)
ADegree of Dissociation
AHelmholtz Energy
AAuris (Latin: ear)
AAlveolar Gas
AAlanine
AAdenosine
AAnimaniacs
AAliphatic Chain (chemistry)
AAngstrom (should be written with Å; unit of length)
AAdenine (one of four DNA building blocks)
AAvianca Airlines (philatelic airmail overprint)
AAbsorbance
AAgouti
AAbsorptance
AAlwaya (dinnerware trademark)
AAdenylic Acid
AAmendment of Application (insurance)
ANucleon Number (physics)
AAromatic Substituent (chemistry)
AAgilent Technologies Incorporated (stock symbol)
AAssisted Citizen (Alabama Public Safety Radio Code)
AStock and Bond Rating
AFederal Reserve Bank of Boston, Massachusetts (designates original spot of circulation of a bill)
AApplanation Tension (pressure in the eye)
ABunsen Solubility Coefficient
AAngle of Asymmetry (NIOSH)
AAssay and Accountability (LANL)
AAutotuned Navaid (aviation navigational aid)
AAktopia
AHighest Level of Division I College Athletics (United States)
AAccelerating Contactor or Relay
ALowest Full-Season Level (minor league baseball)
AUndenominated US Stamp (15 cent, issued 22 May 78)
AAir Force training category (15 days active duty training per year)
References in periodicals archive ?
In order to comprehensively study the effect of the AIT glass texture on the absorptance of amorphous silicon thinfilm solar cells, experiments were performed to investigate the optical absorptance of intrinsic a-Si:H films as well as p-i-n a-Si:H solar cell precursors on such glass sheets.
[a.sub.k] = absorptance of surface k equal to 1 - [[rho].sub.k] for opaque surfaces
The SPAD 502 uses a silicon photodiode to detect transmittance though a leaf sample of light emitted from two light emitting diodes: one with a peak emittance at 650 run, where absorptance by chlorophyll is high and relatively unaffected by carotene, and one with a peak emittance at 940 run, where absorptance by chlorophyll is negligible.
The former was due to the improved carrier collection while the latter, which coincided with the reduction in absorptance, revealed that the carrier generation was further reduced by wider bandgap graded absorbers.
Thermal Performance Values for Low-e Double Glazed with Blinds Layer Heat Transmission Rate, Solar W/([m.sup.2]*K) Transmittance, (Btu/[h*f[t.sup.2]*[degrees]F]) [tau] Low-e 1.9 (0.34) 0.380 double glazing Outer -- 0.550 glass (8 mm [0.32 in.]) Inner -- 0.687 glass (12 mm [0.48 in.]) Blinds -- 0.081 Layer Solar Solar Absorptance, Reflectance, a [rho] Low-e 0.500 0.120 double glazing Outer 0.351 0.099 glass (8 mm [0.32 in.]) Inner 0.248 0.065 glass (12 mm [0.48 in.]) Blinds 0.402 0.517 Note: Thickness of the air space is 12 mm (0.48 in.).Values for blinds were determined by measured values using solar radiation and illuminance sensors.
Aberle, "Method for quantifying optical parasitic absorptance loss of glass and encapsulant materials of silicon wafer based photovoltaic modules," Solar Energy Materials and Solar Cells, vol.
where: [alpha] is the absorptance, [rho] is reflectance, A is area, l is solar radiation, and n is the total opaque surface number.
Table 3 Heat gains on building surfaces Heat gain label Heat gain types in network S1 Solar radiation absorbed by window exterior layer S2 Solar radiation absorbed by window interior layer S11, S21, S31, Solar radiation gain on floor ..., S101 S12, S22, S32, Solar radiation gain on ceiling ..., S102 S13, S23, S33, Solar radiation gain on wall ..., S103 where, [A.sub.window] is window area ([m.sup.2]), [a.sub.e] is exterior layer absorptance (beam radiation), [a.sub.i] is interior layer absorptance (beam radaiton), [a.sub.d] is diffuse absorptance, [I.sub.d] is total diffuse irradiance (w/[m.sup.2]), [I.sub.b] is total beam irradiance (w/[m.sup.2]).
For the base case, the results showed that higher shade absorptance (and lower reflectance) results in lesser rejection of solar radiation incident on the shades, consequently increasing shade temperatures.
A solar collector having a copper tube on an aluminium sheet absorber with absorptance 94% [+ or -] 2% and emittance 5% [+ or -] 2% was used for this study (EnerWorks 2007).
where [alpha] is the mean solar absorptance of the BIPV/T roof, I is the incident solar radiation, A is the roof area, [E.sub.pv]is the rate of electrical energy generation, [E.sub.Thermal]is the rate of thermal energy collection, and [E.sub.0]is the rate of energy that is lost to the surroundings.