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Recommended practices for World Wide Web page engineering for Intranet and Extranet environments, based on World Wide Web Consortium (W3C®) and related industry guidelines, are defined in this recommended practice. This recommended practice does not address stylistic considerations or human-factors considerations in web page design beyond limitations that reflect good engineering practice.

Web sites. --- Web sites --- Design.

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This standard describes test procedures for amplifiers and preamplifiers that are used with semiconductor, scintillation, and proportional detectors in the spectrometry of ionizing radiation. It supersedes ANSI/IEEE Std 301-1976, IEEE Standard Test Procedures for Amplifiers and Preamplifiers for Semiconductor Radiation detectors for Ionizing Radiation. The title was changed because the same amplifiers used for semiconductor detectors are applicable to other types. In this standard, measuring procedures are given in greater detail because with modern amplifiers, perceived performance often depends on the details of measurement. Tests that are specific to amplifiers with time-variant pulse-shaping filters are not included, nor are tests for pile-up rejectors. Time-variant filters allow shorter pulse-shaping times than linear filters for the same signal-to-noise ratio, and pile-up rejectors block pulses that overlap earlier ones, allowing higher count rates for a given spectral-line resolution. Both techniques have the greatest application at very low energies because wide pulses must be used to optimize the SNR, and at high energies where detector artifacts cause low-side tailing of spectrum lines. The pulse width at 50% of peak amplitude is the main amplifier indicator of shaping time because this parameter best allows a performance comparison among different amplifiers. Compared with other parameters, this one is the easiest to measure accurately with an oscilloscope and pulse generator.

Amplifiers (Electronics) --- Power amplifiers.

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This standard applies to those parts of the electric systems in stationery single-unit and multi-unit land-based nuclear power generating stations that provide electric power to the Class IE electric equipment. The electric systems included are comprised of the following interrelated systems" (1) alternating-current power systems, (2) direct-current power systems, (3) vital instrumentation and control power systems. These systems consist of power supplies (e.g., connections to the station switchyard, stand-by generators, batteries), distribution equipment and components (e.g, transformers, switchgear, bus cable, battery chargers, inverters), and instrumentation and controls (e.g., relays, meters, switches, control devices). This standard does not apply to the unit generator(s) and their buses, step-up and auxiliary transformers, switchyard, transmission lines and transmission network.

Battery chargers. --- Battery charging stations (Electric vehicles)

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Class 1E portions of ac and dc power systems and instrumentation and control power systems in single-unit and multiunit nuclear power generating stations are covered. Not included are the preferred power supply; unit generator(s) and their buses; generator breaker; step-up, auxiliary, and start-up transformers; connections to the station switchyard; switchyard; transmission lines; and the transmission network. The intent is to provide criteria for the determination of Class 1E power system design features, criteria for sharing Class 1E power systems in multiunit stations, and the requirements for their testing and surveillance, and the requirements for documentation of the Class 1E power system.

Nuclear power plants. --- Nuclear power plants

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Periodicals. --- Periodicals