Volume 17 - Nondestructive Evaluation and Quality Control Part 21 ppt

• MLCD
• microwave liquid crystal display
• mm
• millimeter
• MOOT
• method of optimal truncation
• MPa
• megapascal
• mpg
• miles per gallon
• mrem
• millirem
• mSv
• millisievert
• MTF
• modulation transfer function
• mV
• millivolt
• MVp
• megavolt peak
• n
• neutrons
• N
• newton
• n
• index of refraction; fringe number; number of tests
•
• average sample size
• n
• unit vector normal to the surface

• N
• number of cycles; summation index; fringe order; length of the near field
• N
K

• Knudsen number
• N
Re

• Reynolds number
• NBS
• National Bureau of Standards
• NDE
• nondestructive evaluation
• NDI
• nondestructive inspection
• NDT
• nondestructive testing
• Nd: YAG
• neodymium: yttrium-aluminum-garnet (laser)
• nm
• nanometer
• NMR
• nuclear magnetic resonance
• No.
• number
• NTSC
• National Television Systems Committee
• OD
• outside diameter

• Oe
• oersted
• OSHA
• Occupational Safety and Health Administration
• oz
• ounce
• p
• probability
• P
• pressure
• Pa
• pascal
• PC
• printed circuit
• PCB
• printed circuit board
• pH
• negative logarithm of hydrogen ion activity
• PH
• precipitation hardening
• PIND
• particle impact noise detection
• PLC
• programmable logic control
• P/M
• powder metallurgy
• PMT
• photomultiplier tube
• POD
• probability of detection

• POFA
• probability of false alarm
• ppm
• parts per million
• ppt
• parts per trillion
• psi
• pounds per square inch
• psig
• gage pressure (pressure relative to ambient pressure) in pounds per square inch
• Q
• calibrated leakage flow
• r
• number of levels of each factor; original pixel value; radius; range
• R
• roentgen
• R
• resistance; reflection coefficient; rise time; gas constant; radius
• R
a

• arithmetic average roughness
• R
s

• effective shunt resistance
• rad
• radiation absorbed dose
• radac
• rapid digital automatic computing

• rbe
• relative biological effectiveness
• ref
• reference
• rem
• roentgen equivalent man; remainder
• RF
• radio frequency
• RFEC
• remote-field eddy current
• RGB
• red, green, blue
• RHM
• roentgen per hour at one meter
• RMM
• roentgen per minute at one meter
• rms
• root mean square
• ROC
• relative operating characteristic
• RSSS
• radiographic standard shooting sketch
• RTR
• real-time radiography
• s
• second
• S
• siemens
• S
• sensitivity; speed; spacing

• S
• signal input
• SAE
• Society of Automotive Engineers
• SAM
• scanning acoustic microscopy
• SAT
• structural assessment testing
• SDD
• source-detector distance
• SDP
• standard depth of penetration
• SEC
• secondary electron-coupled (vidicon)
• SEM
• scanning electron microscopy
• sfm
• surface feet per minute
• SiIMPATT
• silicon impact avalanche transit time
• SIT
• silicon intensified target
• SLAM
• scanning laser acoustic microscopy
• SLR
• single lens reflex
• S/N
• signal-to-noise (ratio)
• SOD
• source-object distance

• SOF
• shape and orientation factor of the flaw
• SPC
• statistical process control
• SPDT
• single pole double throw
• Sv
• sievert
• std
• standard
• t
• time; thickness
• T
• tesla
• T
• temperature; transmission coefficient
• TAB
• tape-automated bonding
• TE
• transverse electric (mode)
• TEM
• transmission electron microscopy
• TEM
• transverse electromagnetic (wave)
• TM
• transverse magnetic (mode)
• TIG
• tungsten inert gas (welding)
• TOF
• time of flight

• tsi
• tons per square inch
• U
g

• geometric unsharpness
• UCL
• upper control limit
• ULCE
• unified life cycle engineering
• USAF
• United States Air Force
• UST
• underground storage tank
• UT
• ultrasonic testing
• v
• degree of freedom; velocity
• V
• volume; velocity; variance
• VHS
• very high speed
• VHSIC
• very high speed integrated circuit
• VLSI
• very large scale integration
• vol
• volume
• W
• watt

• WORM
• write once read many
•
• sample mean
• YIG
• yttrium iron garnet
• yr
• year
• Z
• impedance; atomic number; standard normal distribution
• °
• angular measure; degree
• °C
• degree Celsius (centigrade)
• °F
• degree Fahrenheit
•
• direction of reaction
• ÷
• divided by
• =
• equals
•
• approximately equals
•
• not equal to
•
• identical with
• >
• greater than

•
• much greater than
•
• greater than or equal to
•
• infinity
•
• is proportional to; varies as
•
• integral of
• <
• less than
•
• much less than
•
• less than or equal to
• ±
• maximum deviation
• -
• minus; negative ion charge
• ×
• diameters (magnification); multiplied by
• ·
• multiplied by
• /
• per
• %
• percent
• +
• plus; positive ion charge

•
• square root of
•
• approximately; similar to
•
• partial derivative
•
• thermal diffusivity; angle of incidence
•
• angle of refraction
•
• shear strain
•
• skin depth
•
• change in quantity; increment; range; phase shift
•
• normal strain; emissivity; dielectric coefficient
•
• viscosity
•
• angle
•
• wavelength; mean free path
•
• linear attenuation coefficient; magnetic permeability; the mean (or average) of a distribution
• in.
• microinch
• m
• micron (micrometer)

•
• Poisson's ratio; frequency
•
• pi (3.141592)
•
• density; resistivity
•
• stress; standard deviation; electrical conductivity
•
• summation of
•
• shear stress
•
• angle of refraction
•
• circular frequency (angular velocity)
•
• ohm
o Greek Alphabet
• A,
• alpha
• B,
• beta
• ,
• gamma
• ,
• delta
• E,
• epsilon
• Z,

• zeta
• H,
• eta
• ,
• theta
• I,
• iota
• K,
• kappa
• ,
• lambda
• M,
• mu
• N,
• nu
• ,
• xi
• O, o
• omicron
• ,
• pi
• P,
• rho
• ,
• sigma
• T,
• tau
• ,
• upsilon
• ,

• phi
• X,
• chi
• ,
• psi
• ,
• omega