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  2. Hard disk drive performance characteristics - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive...

    The spindle motor speed can use one of two types of disk rotation methods: 1) constant linear velocity (CLV), used mainly in optical storage, varies the rotational speed of the optical disc depending upon the position of the head, and 2) constant angular velocity (CAV), used in HDDs, standard FDDs, a few optical disc systems, and vinyl audio records, spins the media at one constant speed ...

  3. Optical storage media writing and reading speed - Wikipedia

    en.wikipedia.org/wiki/Optical_storage_media...

    25.0 GB. 23.28 GiB. 90. Modern compact discs support a writing speed of 52× and higher, with some modern DVDs supporting speeds of up to 24×. [4] Writing a DVD at 1× ( 1 385 000 bytes per second) [5] is approximately 9 times faster than writing a CD at 1× ( 153 600 bytes per second ). [6] However, the actual speeds depend on the type of ...

  4. Worldwide Harmonised Light Vehicles Test Procedure - Wikipedia

    en.wikipedia.org/wiki/Worldwide_Harmonised_Light...

    v. t. e. The Worldwide harmonized Light vehicles Test Procedure ( WLTP) [1] is a global driving cycle standard for determining the levels of pollutants, CO 2 emission standards and fuel consumption of conventional internal combustion engine (ICE) and hybrid automobiles, as well as the all-electric range of plug-in electric vehicles .

  5. Braking distance - Wikipedia

    en.wikipedia.org/wiki/Braking_distance

    Braking distance. Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling ...

  6. Cycloidal drive - Wikipedia

    en.wikipedia.org/wiki/Cycloidal_drive

    A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Cycloidal speed reducers are capable of relatively high ratios in compact sizes with very low backlash. [1] The input shaft drives an eccentric bearing that in turn drives the cycloidal disc in an eccentric, cycloidal motion.

  7. Hours of service - Wikipedia

    en.wikipedia.org/wiki/Hours_of_service

    Parts of a driver's work day are defined in four terms: On-duty time, off-duty time, driving time, and sleeper berth time. FMCSA regulation § 395.2 states: [5] On-duty time is all time from when a driver begins to work or is required to be in readiness to work until the driver is relieved from work and all responsibility for performing work.

  8. Headway - Wikipedia

    en.wikipedia.org/wiki/Headway

    Headway. Headway is the distance or duration between vehicles in a transit system measured in space or time. The minimum headway is the shortest such distance or time achievable by a system without a reduction in the speed of vehicles. The precise definition varies depending on the application, but it is most commonly measured as the distance ...

  9. Light-year - Wikipedia

    en.wikipedia.org/wiki/Light-year

    A value of 9.460 536 207 × 10 15 m found in some modern sources is the product of a mean Gregorian year (365.2425 days or 31 556 952 s) and the defined speed of light (299 792 458 m/s). Another value, 9.460 528 405 × 10 15 m, is the product of the J1900.0 mean tropical year and the defined speed of light.

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