Volume 17 - Nondestructive Evaluation and Quality Control Part 21 ppt

• MLCD

• microwave liquid crystal display

• millimeter

• method of optimal truncation

• megapascal

• miles per gallon

• millirem

• millisievert

• modulation transfer function

• mV

• millivolt

• 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

• NK

• Knudsen number

• NRe

• Reynolds number

• National Bureau of Standards

• nondestructive evaluation

• nondestructive inspection

• nondestructive testing

• neodymium: yttrium-aluminum-garnet (laser)

• nm

• nanometer

• nuclear magnetic resonance

• number

• National Television Systems Committee

• OD

• outside diameter

• Oe

• oersted

• Occupational Safety and Health Administration

• oz

• ounce

• p

• probability

• P

• pressure

• Pa

• pascal

• PC

• printed circuit

• printed circuit board

• pH

• negative logarithm of hydrogen ion activity

• PH

• precipitation hardening

• particle impact noise detection

• programmable logic control

• powder metallurgy

• photomultiplier tube

• probability of detection

• probability of false alarm

• parts per million

• parts per trillion

• pounds per square inch

• 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

• Ra

• arithmetic average roughness

• Rs

• effective shunt resistance

• radiation absorbed dose

• rapid digital automatic computing

• relative biological effectiveness

• ref

• reference

• roentgen equivalent man; remainder

• RF

• radio frequency

• remote-field eddy current

• red, green, blue

• roentgen per hour at one meter

• roentgen per minute at one meter

• root mean square

• relative operating characteristic

• radiographic standard shooting sketch

• real-time radiography

• s

• second

• S

• siemens

• S

• sensitivity; speed; spacing

• S

• signal input

• Society of Automotive Engineers

• scanning acoustic microscopy

• structural assessment testing

• source-detector distance

• standard depth of penetration

• secondary electron-coupled (vidicon)

• scanning electron microscopy

• surface feet per minute

• silicon impact avalanche transit time

• silicon intensified target

• scanning laser acoustic microscopy

• single lens reflex

• signal-to-noise (ratio)

• source-object distance

• shape and orientation factor of the flaw

• statistical process control

• single pole double throw

• Sv

• sievert

• standard

• t

• time; thickness

• T

• tesla

• T

• temperature; transmission coefficient

• tape-automated bonding

• TE

• transverse electric (mode)

• transmission electron microscopy

• transverse electromagnetic (wave)

• TM

• transverse magnetic (mode)

• tungsten inert gas (welding)

• time of flight

• tons per square inch

• Ug

• geometric unsharpness

• upper control limit

• unified life cycle engineering

• United States Air Force

• underground storage tank

• UT

• ultrasonic testing

• v

• degree of freedom; velocity

• V

• volume; velocity; variance

• very high speed

• very high speed integrated circuit

• very large scale integration

• volume

• W

• watt

• write once read many

•

• sample mean

• 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

• microinch

• 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

• alpha

• beta

• gamma

• delta

• epsilon

• zeta

• eta

• theta

• iota

• kappa

• lambda

• mu

• nu

• xi

• omicron

• pi

• rho

• sigma

• tau

• upsilon

• phi

• chi

• psi

• omega