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The rugged construction of NiMH batteries is well suited for combat robot use. This is an emerging battery technology that is still seeing constant improvement. Fast-charge/fast-discharge NiMH packs are required. The Ahr rating of this battery type is also specified at a 1-hour rate. Multiply by 0.92(see Table 5-1) to convert this 1-hour rate to the 6-minute Ahr rate. For example, a D-cell NiMH battery pack with a capacity of 6.5Ahr, has a usable 6-minute capacity of 6Ahr (6 = 0.92 6.5Ahr) and can provide a calculated average current of 60 amps (60 = 10 6Ahr) for the 6-minute duration. Even so, the specification data sheets show that for the fast-charge/fast-discharge C-cell or D-cell batteries, the maximum average current is only about 40 amps, with the peak current limit of about 100 amps. For higher current draw requirements, it is necessary to parallel the batteries. For fast charging, use only a charger designed for NiMH. Using a charger designed only for NiCads, for example, will usually destroy NiMH batteries. Because this technology is relatively new, chargers for this type of battery are harder to come by than NiCad or SLA chargers.

ventional television in both the horizontal and vertical dimensions, and a picture aspect ratio of 16:9. Used loosely to refer to the U.S. DTV System. Contrast with EDTV and IDTV. HDV High-definition video. A high definition, red-laser optical disc format in China that uses MPEG4. Promoted by Beijing Kaicheng High-Clarity Electronics Technology Co. Competed with EVD and HVD. Hertz See Hz. hexadecimal Representation of numbers using base 16. HFS Hierarchical file system. A file system used by Apple Computer s Mac OS operating system. High Sierra The original file system standard developed for CD-ROM, later modified and adopted as ISO 9660. highlight A method of display that emphasizes a selected item on a menu by increasing the brightness level to show which function is executed. horizontal resolution See lines of horizontal resolution. HQ-VCD High-quality Video Compact Disc. Developed by the Video CD Consortium (Philips, Sony, Panasonic, and JVC) as a successor to VCD. Evolved into SVCD. HRRA Home Recording Rights Association. HSF See High Sierra. HTML Hypertext markup language. A tagging specification, based on SGML (standard generalized markup language), for formatting text to be transmitted over the Internet and displayed by client software. hue The color of light or of a pixel. The property of color determined by the dominant wavelength of light. Huffman coding A lossless compression technique of assigning variable-length codes to a known set of values. Values occurring most frequently are assigned the shortest codes. MPEG uses a variation of Huffman coding with fixed code tables, often called variable-length coding (VLC). HVD 1) Holographic versatile disc, as defined by the HVD Alliance. An optical disc format using laser holography to store hundreds of gigabytes on a single disc. 2) High-definition versatile disc. A high definition, red-laser optical disc format in China. Competed with EVD and HDV. hybrid disc 1) In the general sense, a combination of two different physical discs formats on a single disc, such as the DualDisc combination of CD audio and DVD-Audio. 2) For BD, Hybrid (usually capitalized) means a disc that combines one layer of DVD and one layer of BD. Hz Hertz. A unit of frequency measurement. The number of cycles (repetitions) per second. I picture (or I frame) In MPEG video, an intra picture that is encoded independent from other pictures (see intraframe). Transform coding (DCT, quantization, and VLC) is used with no motion compensation, resulting in only moderate compression. I pictures provide a reference point for dependent P pictures and B pictures and allow random access into the compressed video stream. i.Link Trademarked Sony name for IEEE 1394. ICT Image Constraint Token. A copy deterrent feature of AACS that allows the content owner to set a flag on the disc that makes Blu-ray players downconvert digital video to 960 540 on analog outputs. Around the time Blu-ray was introduced, most Hollywood studios stated they had no plans to use ICT. IDE Integrated drive electronics. An internal bus, or standard electronic interface between a computer and internal block storage devices. IDE was adopted as a standard by ANSI in November 1990. ANSI calls it Advanced Technology Attachment (ATA). Also see E-IDE and ATAPI. IDTV 1) Improved-definition television. A television receiver that improves the apparent quality of the picture from a standard video signal by using techniques such as frame doubling, line doubling, and digital signal processing. 2) Integrated digital television (usually iDTV). A television incorporating features that would otherwise be in an external box, such as a DVR or digital cable tuner set-top box.

The first three digits refer to the network identifier (245). The next three digits refer to the cluster number (100). The final three digits refers to the member number (000).

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