For outdoor signs and displays, acrylic, with its outstanding optical characteristics, weather resistance and formability, strongly dominates the picture.

For the further discussion, we shall thus assume an electron optical resolution of 80 Af and phosphor screen resolution of 60 Af.

For general computer use access technology such as screen readers, screen magnifiers and refreshable Braille displays has been widely taken up along with standalone reading aids that integrate a scanner, optical character recognition ( OCR ) software, and speech software in a single machine.

For example, the SEA-ME-WE 3 optical submarine telecommunications cable lands at both Medan and Jakarta connecting Europe with South eastern Asia ( several countries up to Japan ) and Australia ( Perth ).

For real, passive, optical systems, the output luminance is at most equal to the input.

For similar reasons, a bodyguard with a holster-carried, concealed weapon is typically not able to mount accessories onto the weapon, such as optical sights or forward handgrips.

For example, the Giant Magellan Telescope will have seven 8. 4 meter primary mirrors, with the resolving power equivalent to a optical aperture.

For example, the stability of bulk matter ( which consists of atoms and molecules which would quickly collapse under electric forces alone ), the rigidity of solids, and the mechanical, thermal, chemical, optical and magnetic properties of matter are all results of the interaction of electric charges under the rules of quantum mechanics.

For optical applications, this is characterized by the index of refraction.

For many materials ( for instance, semiconductors ), electrons move quickly from a high energy level to a meta-stable level via small nonradiative transitions and then make the final move down to the bottom level via an optical or radiative transition.

For example, the term subwavelength-diameter optical fibre means an optical fibre whose diameter is less than the wavelength of light propagating through it.

For planetary rings, the optical depth is the proportion of light blocked by the ring when it lies between the source and the observer.

* For an optical cavity consisting of two mirrors, confocal means that they share their foci.

For the optical regime, see beam divergence.

For a single-mode optical fiber, the cutoff wavelength is the wavelength at which the normalized frequency is approximately equal to 2. 405.

For an optical fiber, the effective mode volume is the square of the product of the diameter of the near-field pattern and the sine of the radiation angle of the far-field pattern.

For both families, the lowest-order solution describes a Gaussian beam, while higher-order solutions describe higher-order transverse modes in an optical resonator.

: Note: For optical fiber dispersion measurement purposes, the quantity of interest is group delay per unit length, which is the reciprocal of the group velocity of a particular mode.

For a Gaussian intensity ( i. e. power density, W / m < sup > 2 </ sup >) distribution in a single-mode optical fiber, the mode field diameter is that at which the electric and magnetic field strengths are reduced to 1 / e of their maximum values, i. e., the diameter at which power density is reduced to 1 / e < sup > 2 </ sup > of the maximum power density, because the power density is proportional to the square of the field strength.

For an optical fiber, the optical axis is along the center of the fiber core, and is also known as the fiber axis.

For example, using a long pulse length, it may possible to measure attenuation over a distance of more than 100 km, however in this case an optical event may appear to be over 1 km long.

For optical fibers, a power-law index profile is an index of refraction profile characterized by

For an optical fiber or waveguide, a radiation mode or unbound mode is a mode which is not confined by the fiber core.

For the occasion on which everyone already knows everyone else and the host wishes them to meet one or a few honored newcomers, then the `` open house '' system is advantageous because the honored guests are fixed connective points and the drifting guests make and break connections at the door.

For the past 40 years Congress has advocated a carefully planned, balanced and competitive railway system.

For a few details of the system the lines are 1-1/4'' '' X-Tru-Coat, a product of Republic Steel Corp., and all lines are welded.

For purposes of sample selection only ( individual tests were given later ) we obtained group test scores of reading achievement and intelligence from school records of the entire third-grade population in each school system.

For a time following the abandonment of the local plant, electric current for Manchester was brought in from the south with an emergency tie-in with the Vermont Marble Company system to the north.

For the case of a purely inertial autonavigator consisting of three restrained gyros, a coordinate system is used where the sensitive axis of the X accelerometer is parallel to the east-west direction at the base point, and the Y accelerometer sensitive axis is parallel to the north-south direction at the base point.

For the purposes of the treaty system, Antarctica is defined as all of the land and ice shelves south of 60 ° S latitude.

For example, an adiabatic boundary is a boundary that is impermeable to heat transfer and the system is said to be adiabatically ( or thermally ) insulated ; an insulated wall approximates an adiabatic boundary.

For tourists, the Acapulco city government has established a system of yellow buses with Acapulco!

For example a two dimensional array with three rows and four columns might provide access to the element at the 2nd row and 4th column by the expression: ( in a row major language ) and ( in a column major language ) in the case of a zero-based indexing system.

For example a target acquisition element can send a message with target details which is automatically routed through the tactical and technical fire control elements to deliver firing data to the gun's laying system and the gun automatically laid.

For bridged alkenes, the Bredt's rule states that a double bond cannot be placed at the bridgehead of a bridged ring system, unless the rings are large enough.

For example, when a user logs into a computer that is part of a Windows domain, Active Directory checks the submitted password and determines whether the user is a system administrator or normal user.

For a system of point particles without any intrinsic angular momentum ( see below ), it turns out to be

For any system, the following restrictions on measurement results apply, where is the reduced Planck constant and is any direction vector such as x, y, or z:

For a Gaussian response system ( or a simple RC roll off ), the rise time is approximated by:

For example, the three-domain system separates Archaea and Bacteria, previously grouped into the single kingdom Monera ( bacteria ).

For example, the DIN 41612 connectors used in the VMEbus system can withstand 50 to 500 insertions and removals ( called mating cycles ), depending on their quality.

For example in the case of anthrax, it is likely that by 24 – 36 hours after an attack, some small percentage of individuals ( those with compromised immune system or who had received a large dose of the organism due to proximity to the release point ) will become ill with classical symptoms and signs ( including a virtually unique chest X-ray finding, often recognized by public health officials if they receive timely reports ).

For example, an IBM PC might have either a monochrome or a color display adapter ( using different display memory addresses and hardware ), but a single, standard, BIOS system call may be invoked to display a character at a specified position on the screen in text mode.

For this reason, activists talk about the issue of ecological debt which implies a sort of predatory economic system.

For most purposes, most jurisdictions, including the U. S. federal system and most states, have merged the two courts.

For example, adding more S from the outside will cause an excess of products, and the system will try to counteract this by increasing the reverse reaction and pushing the equilibrium point backward ( though the equilibrium constant will stay the same ).

For many decades thereafter, historians derided the Parliamentary Republic as a quarrel-prone system that merely distributed spoils and clung to its laissez-faire policy while national problems mounted.

For example, the Canadian province of Quebec, which is French-speaking, has its own system of French-speaking television, movie and music celebrities.