Some doubted the discovery at first, arguing that the appearance of the structure was merely an optical illusion created by the observation technique used by Golgi.

Some multi-track recordings were made on optical sound film, which led to new advances used primarily by MGM ( as early as 1937 ) and Twentieth Century Fox ( as early as 1941 ).

Some optical keyboards use a special key structure that blocks the light in a certain pattern, allowing only one beam per row of keys ( most commonly a horizontal beam ).

Some earlier optical keyboards were limited in their structure and required special casing to block external light, no multi-key functionality was supported and the design was very limited to a thick rectangular case.

Some cameras make use of multiple lenses and rainbow-colored flashes, or exhibit extreme optical distortions and even light leaks.

Some lasers do not use an optical cavity, but instead rely on very high optical gain to produce significant amplified spontaneous emission ( ASE ) without needing feedback of the light back into the gain medium.

Some of these instruments produce a virtual image when applied to the human eye ; others produce a real image which can be captured on photographic film or an optical sensor, or can be viewed on a screen.

Some advanced face and eye powders contain optical brightener microspheres that brighten shadowed or dark areas of the skin, such as " tired eyes ".

Some quasars display changes in luminosity which are rapid in the optical range and even more rapid in the X-rays.

Some effects involved a combination of techniques ; a ray gun might require a pyrotechnic during filming, and then an optical glowing line added to the film image in post-production.

Some optical power is lost into clad due to these modes.

Some modern optical power meters have the capability to set to zero the reference level measured at the output of the reference fiber, so that the transmission loss of the fiber under test may be read out directly.

Some phenomena are yet to be conclusively explained and may possibly be some form of optical phenomena.

Some studios sought to compensate for this by shooting their color pictures with a full aperture gate ( rather than the Academy aperture ), and then reducing the image in Technicolor's optical printer ( a predecessor of that which would be today's Super-35 1. 85: 1 format ).

Some minerals exhibit unusual optical phenomena, such as asterism ( the display of a star-shaped luminous area ) or chatoyancy ( the display of luminous bands, which appear to move as the specimen is rotated ).

Some plastics also have more advantageous optical properties than glass, such as better transmission of visible light and greater absorption of ultraviolet light.

Some games, however, have mounted optical guns, such as Exidy's Crossbow.

Some cystoscopes use optical fibres ( flexible glass fibres ) that carry an image from the tip of the instrument to a viewing piece at the other end.

Some of the knots do exhibit well-developed tails which are often detectable in optical thickness from the visual spectrum.

Some superconducting magnets have a small sample chamber, far too small to contain the entire optical system.

Some high performance objective lenses may require matched eyepieces to deliver the best optical performance.

Some important properties of laser diodes are determined by the geometry of the optical cavity.

Some of his particular achievements include measurements of variable stars, using photography, and the improvement of optical systems, through the perturbative investigation of geometrical aberrations.

Some software add-ons provide operability with specific hardware, such as game controllers and optical motion sensors.

Comparison of several forms of disk storage showing tracks ( not-to-scale ); green denotes start and red denotes end .< nowiki >*</ nowiki > Some CD-R ( W ) and DVD-R ( W )/ DVD + R ( W ) recorders operate in ZCLV, CAA or CAV modes.

Some racing clutches use small multi-plate disk packs that are not part of the flywheel.

Some disk operating systems were the operating system for the entire computer system.

Some older tape drives-such as the DECtape, the ZX Microdrive and the Rotronics Wafadrive-were designed as inexpensive alternatives to disk drives which were at the time very expensive.

Some directory operations ( including < tt > unlink </ tt >( 2 )) are not synchronous on ReiserFS, which can result in data corruption with applications relying heavily on file-based locks ( such as mail transfer agents qmail and Postfix ) if the machine halts before it has synchronized the disk.

Some low-cost peripherals no longer contain non-volatile memory for firmware, and instead rely on the host system to transfer the device control program from a disk file or CD.

Comparison of several forms of disk storage showing tracks ( not-to-scale ); green denotes start and red denotes end .< nowiki >*</ nowiki > Some CD-R ( W ) and DVD-R ( W )/ DVD + R ( W ) recorders operate in ZCLV, CAA or CAV modes.

Some operating systems include tools for " collecting " entropy from the timing of unpredictable operations such as disk drive head movements.

Some versions of DOS don't assign the drive letter, beginning with C :, to the first active primary partition recognized upon the first physical hard disk, but on the first primary partition recognized of the first hard disk, even if it is not set active.

Some implementations do not neatly fit either category: a DOM approach can keep its persistent data on disk, cleverly organized for speed ( editors such as SoftQuad Author / Editor and large-document browser / indexers such as DynaText do this ); while a SAX approach can cleverly cache information for later use ( any validating SAX parser keeps more information than described above ).

Some disk imaging utilities omit unused file space from source media, or compress the disk they represent to reduce storage requirements, though these are typically referred to as archive files, as they are not literally disk images.

Some government agencies ( e. g., NSA ) require that all disk drives be physically pulverized when they are discarded, and in some cases, chemically treated with corrosives before or after.

Some bulges have similar properties to those of elliptical galaxies ( scaled down to lower mass and luminosity ); others simply appear as higher density centers of disks, with properties similar to disk galaxies.

Some calculations show that interaction with the disk can cause rapid inward migration, which, if not stopped, results in the planet reaching the " central regions still as a sub-Jovian object.

Some BIOSes ( like the IBM PC / AT ) perform the check only for fixed disk / removable drives, while for floppies and superfloppies it is enough to start with a byte greater or equal to < tt > 06h </ tt > and the first nine words not to contain the same value, before the boot sector is accepted as valid, thereby avoiding the explicit test for < tt > 0x55 </ tt >, < tt > 0xAA </ tt > on floppies.

Some machines have a serial number in ROM, while others do not, and so some other metric, such as the date and time ( to the second ) of initialization of the hard disk can be used.

Some of the performance parameters in the superblock included number of tracks and sectors, disk rotation speed, head speed, and alignment of the sectors between tracks.

Some software, e. g. ADTPro, makes use of this to store Apple II and Apple III versions of a program on the same disk, which is then bootable on both systems.

Comparison of several forms of disk storage showing tracks ( not-to-scale ); green denotes start and red denotes end .< nowiki >*</ nowiki > Some CD-R ( W ) and DVD-R ( W )/ DVD + R ( W ) recorders operate in ZCLV, CAA or CAV modes.

Some schools had simple local area networks of Scandis computers, where 10-20 machines shared one hard disk of typically 10MB capacity.

Some ATs came with one high-density ( HD ) disk drive and one double-density ( DD ) 360 kB drive.